The Tor Browser: netwerk/base/src/nsStandardURL.cpp@6474c204b198 (annotated)

netwerk/base/src/nsStandardURL.cpp@6474c204b198 (annotated)

netwerk/base/src/nsStandardURL.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* vim:set ts=4 sw=4 sts=4 et cindent: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "IPCMessageUtils.h"
 #include "nsStandardURL.h"
 #include "nsCRT.h"
 #include "nsEscape.h"
 #include "nsIFile.h"
 #include "nsIObjectInputStream.h"
 #include "nsIObjectOutputStream.h"
 #include "nsICharsetConverterManager.h"
 #include "nsIPrefService.h"
 #include "nsIPrefBranch.h"
 #include "nsIIDNService.h"
 #include "prlog.h"
 #include "nsAutoPtr.h"
 #include "nsIProgrammingLanguage.h"
 #include "nsIURLParser.h"
 #include "nsNetCID.h"
 #include "mozilla/MemoryReporting.h"
 #include "mozilla/ipc/URIUtils.h"
 #include <algorithm>
 using namespace mozilla::ipc;
 static NS_DEFINE_CID(kThisImplCID, NS_THIS_STANDARDURL_IMPL_CID);
 static NS_DEFINE_CID(kStandardURLCID, NS_STANDARDURL_CID);
 nsIIDNService *nsStandardURL::gIDN = nullptr;
 nsICharsetConverterManager *nsStandardURL::gCharsetMgr = nullptr;
 bool nsStandardURL::gInitialized = false;
 bool nsStandardURL::gEscapeUTF8 = true;
 bool nsStandardURL::gAlwaysEncodeInUTF8 = true;
 char nsStandardURL::gHostLimitDigits[] = { '/', '\\', '?', '#', 0 };
 #if defined(PR_LOGGING)
 //
 // setenv NSPR_LOG_MODULES nsStandardURL:5
 //
 static PRLogModuleInfo *gStandardURLLog;
 #endif
 // The Chromium code defines its own LOG macro which we don't want
 #undef LOG
 #define LOG(args)     PR_LOG(gStandardURLLog, PR_LOG_DEBUG, args)
 #undef LOG_ENABLED
 #define LOG_ENABLED() PR_LOG_TEST(gStandardURLLog, PR_LOG_DEBUG)
 //----------------------------------------------------------------------------
 #define ENSURE_MUTABLE() \
   PR_BEGIN_MACRO \
     if (!mMutable) { \
         NS_WARNING("attempt to modify an immutable nsStandardURL"); \
         return NS_ERROR_ABORT; \
     } \
   PR_END_MACRO
 //----------------------------------------------------------------------------
 static nsresult
 EncodeString(nsIUnicodeEncoder *encoder, const nsAFlatString &str, nsACString &result)
 {
     nsresult rv;
     int32_t len = str.Length();
     int32_t maxlen;
     rv = encoder->GetMaxLength(str.get(), len, &maxlen);
     if (NS_FAILED(rv))
         return rv;
     char buf[256], *p = buf;
     if (uint32_t(maxlen) > sizeof(buf) - 1) {
         p = (char *) malloc(maxlen + 1);
         if (!p)
             return NS_ERROR_OUT_OF_MEMORY;
     }
     rv = encoder->Convert(str.get(), &len, p, &maxlen);
     if (NS_FAILED(rv))
         goto end;
     if (rv == NS_ERROR_UENC_NOMAPPING) {
         NS_WARNING("unicode conversion failed");
         rv = NS_ERROR_UNEXPECTED;
         goto end;
     }
     p[maxlen] = 0;
     result.Assign(p);
     len = sizeof(buf) - 1;
     rv = encoder->Finish(buf, &len);
     if (NS_FAILED(rv))
         goto end;
     buf[len] = 0;
     result.Append(buf);
 end:
     encoder->Reset();
     if (p != buf)
         free(p);
     return rv;
 }
 //----------------------------------------------------------------------------
 // nsStandardURL::nsPrefObserver
 //----------------------------------------------------------------------------
 #define NS_NET_PREF_ESCAPEUTF8         "network.standard-url.escape-utf8"
 #define NS_NET_PREF_ALWAYSENCODEINUTF8 "network.standard-url.encode-utf8"
 NS_IMPL_ISUPPORTS(nsStandardURL::nsPrefObserver, nsIObserver)
 NS_IMETHODIMP nsStandardURL::
 nsPrefObserver::Observe(nsISupports *subject,
                         const char *topic,
                         const char16_t *data)
 {
     if (!strcmp(topic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
         nsCOMPtr<nsIPrefBranch> prefBranch( do_QueryInterface(subject) );
         if (prefBranch) {
             PrefsChanged(prefBranch, NS_ConvertUTF16toUTF8(data).get());
         }
     }
     return NS_OK;
 }
 //----------------------------------------------------------------------------
 // nsStandardURL::nsSegmentEncoder
 //----------------------------------------------------------------------------
 nsStandardURL::
 nsSegmentEncoder::nsSegmentEncoder(const char *charset)
     : mCharset(charset)
 {
 }
 int32_t nsStandardURL::
 nsSegmentEncoder::EncodeSegmentCount(const char *str,
                                      const URLSegment &seg,
                                      int16_t mask,
                                      nsAFlatCString &result,
                                      bool &appended,
                                      uint32_t extraLen)
 {
     // extraLen is characters outside the segment that will be
     // added when the segment is not empty (like the @ following
     // a username).
     appended = false;
     if (!str)
         return 0;
     int32_t len = 0;
     if (seg.mLen > 0) {
         uint32_t pos = seg.mPos;
         len = seg.mLen;
         // first honor the origin charset if appropriate. as an optimization,
         // only do this if the segment is non-ASCII.  Further, if mCharset is
         // null or the empty string then the origin charset is UTF-8 and there
         // is nothing to do.
         nsAutoCString encBuf;
         if (mCharset && *mCharset && !nsCRT::IsAscii(str + pos, len)) {
             // we have to encode this segment
             if (mEncoder || InitUnicodeEncoder()) {
                 NS_ConvertUTF8toUTF16 ucsBuf(Substring(str + pos, str + pos + len));
                 if (NS_SUCCEEDED(EncodeString(mEncoder, ucsBuf, encBuf))) {
                     str = encBuf.get();
                     pos = 0;
                     len = encBuf.Length();
                 }
                 // else some failure occurred... assume UTF-8 is ok.
             }
         }
         // escape per RFC2396 unless UTF-8 and allowed by preferences
         int16_t escapeFlags = (gEscapeUTF8 || mEncoder) ? 0 : esc_OnlyASCII;
         uint32_t initLen = result.Length();
         // now perform any required escaping
         if (NS_EscapeURL(str + pos, len, mask | escapeFlags, result)) {
             len = result.Length() - initLen;
             appended = true;
         }
         else if (str == encBuf.get()) {
             result += encBuf; // append only!!
             len = encBuf.Length();
             appended = true;
         }
         len += extraLen;
     }
     return len;
 }
 const nsACString &nsStandardURL::
 nsSegmentEncoder::EncodeSegment(const nsASingleFragmentCString &str,
                                 int16_t mask,
                                 nsAFlatCString &result)
 {
     const char *text;
     bool encoded;
     EncodeSegmentCount(str.BeginReading(text), URLSegment(0, str.Length()), mask, result, encoded);
     if (encoded)
         return result;
     return str;
 }
 bool nsStandardURL::
 nsSegmentEncoder::InitUnicodeEncoder()
 {
     NS_ASSERTION(!mEncoder, "Don't call this if we have an encoder already!");
     nsresult rv;
     if (!gCharsetMgr) {
         rv = CallGetService("@mozilla.org/charset-converter-manager;1",
                             &gCharsetMgr);
         if (NS_FAILED(rv)) {
             NS_ERROR("failed to get charset-converter-manager");
             return false;
         }
     }
     rv = gCharsetMgr->GetUnicodeEncoder(mCharset, getter_AddRefs(mEncoder));
     if (NS_FAILED(rv)) {
         NS_ERROR("failed to get unicode encoder");
         mEncoder = 0; // just in case
         return false;
     }
     return true;
 }
 #define GET_SEGMENT_ENCODER_INTERNAL(name, useUTF8) \
     nsSegmentEncoder name(useUTF8 ? nullptr : mOriginCharset.get())
 #define GET_SEGMENT_ENCODER(name) \
     GET_SEGMENT_ENCODER_INTERNAL(name, gAlwaysEncodeInUTF8)
 #define GET_QUERY_ENCODER(name) \
     GET_SEGMENT_ENCODER_INTERNAL(name, false)
 //----------------------------------------------------------------------------
 // nsStandardURL <public>
 //----------------------------------------------------------------------------
 #ifdef DEBUG_DUMP_URLS_AT_SHUTDOWN
 static PRCList gAllURLs;
 #endif
 nsStandardURL::nsStandardURL(bool aSupportsFileURL)
     : mDefaultPort(-1)
     , mPort(-1)
     , mHostA(nullptr)
     , mHostEncoding(eEncoding_ASCII)
     , mSpecEncoding(eEncoding_Unknown)
     , mURLType(URLTYPE_STANDARD)
     , mMutable(true)
     , mSupportsFileURL(aSupportsFileURL)
 {
 #if defined(PR_LOGGING)
     if (!gStandardURLLog)
         gStandardURLLog = PR_NewLogModule("nsStandardURL");
 #endif
     LOG(("Creating nsStandardURL @%p\n", this));
     if (!gInitialized) {
         gInitialized = true;
         InitGlobalObjects();
     }
     // default parser in case nsIStandardURL::Init is never called
     mParser = net_GetStdURLParser();
 #ifdef DEBUG_DUMP_URLS_AT_SHUTDOWN
     PR_APPEND_LINK(&mDebugCList, &gAllURLs);
 #endif
 }
 nsStandardURL::~nsStandardURL()
 {
     LOG(("Destroying nsStandardURL @%p\n", this));
     if (mHostA) {
         free(mHostA);
     }
 #ifdef DEBUG_DUMP_URLS_AT_SHUTDOWN
     PR_REMOVE_LINK(&mDebugCList);
 #endif
 }
 #ifdef DEBUG_DUMP_URLS_AT_SHUTDOWN
 struct DumpLeakedURLs {
     DumpLeakedURLs() {}
     ~DumpLeakedURLs();
 };
 DumpLeakedURLs::~DumpLeakedURLs()
 {
     if (!PR_CLIST_IS_EMPTY(&gAllURLs)) {
         printf("Leaked URLs:\n");
         for (PRCList *l = PR_LIST_HEAD(&gAllURLs); l != &gAllURLs; l = PR_NEXT_LINK(l)) {
             nsStandardURL *url = reinterpret_cast<nsStandardURL*>(reinterpret_cast<char*>(l) - offsetof(nsStandardURL, mDebugCList));
             url->PrintSpec();
         }
     }
 }
 #endif
 void
 nsStandardURL::InitGlobalObjects()
 {
     nsCOMPtr<nsIPrefBranch> prefBranch( do_GetService(NS_PREFSERVICE_CONTRACTID) );
     if (prefBranch) {
         nsCOMPtr<nsIObserver> obs( new nsPrefObserver() );
         prefBranch->AddObserver(NS_NET_PREF_ESCAPEUTF8, obs.get(), false);
         prefBranch->AddObserver(NS_NET_PREF_ALWAYSENCODEINUTF8, obs.get(), false);
         PrefsChanged(prefBranch, nullptr);
     }
 #ifdef DEBUG_DUMP_URLS_AT_SHUTDOWN
     PR_INIT_CLIST(&gAllURLs);
 #endif
 }
 void
 nsStandardURL::ShutdownGlobalObjects()
 {
     NS_IF_RELEASE(gIDN);
     NS_IF_RELEASE(gCharsetMgr);
 #ifdef DEBUG_DUMP_URLS_AT_SHUTDOWN
     if (gInitialized) {
         // This instanciates a dummy class, and will trigger the class
         // destructor when libxul is unloaded. This is equivalent to atexit(),
         // but gracefully handles dlclose().
         static DumpLeakedURLs d;
     }
 #endif
 }
 //----------------------------------------------------------------------------
 // nsStandardURL <private>
 //----------------------------------------------------------------------------
 void
 nsStandardURL::Clear()
 {
     mSpec.Truncate();
     mPort = -1;
     mScheme.Reset();
     mAuthority.Reset();
     mUsername.Reset();
     mPassword.Reset();
     mHost.Reset();
     mHostEncoding = eEncoding_ASCII;
     mPath.Reset();
     mFilepath.Reset();
     mDirectory.Reset();
     mBasename.Reset();
     mExtension.Reset();
     mQuery.Reset();
     mRef.Reset();
     InvalidateCache();
 }
 void
 nsStandardURL::InvalidateCache(bool invalidateCachedFile)
 {
     if (invalidateCachedFile)
         mFile = 0;
     if (mHostA) {
         free(mHostA);
         mHostA = nullptr;
     }
     mSpecEncoding = eEncoding_Unknown;
 }
 bool
 nsStandardURL::EscapeIPv6(const char *host, nsCString &result)
 {
     // Escape IPv6 address literal by surrounding it with []'s
     if (host && (host[0] != '[') && PL_strchr(host, ':')) {
         result.Assign('[');
         result.Append(host);
         result.Append(']');
         return true;
     }
     return false;
 }
 bool
 nsStandardURL::NormalizeIDN(const nsCSubstring &host, nsCString &result)
 {
     // If host is ACE, then convert to UTF-8.  Else, if host is already UTF-8,
     // then make sure it is normalized per IDN.
     // this function returns true if normalization succeeds.
     // NOTE: As a side-effect this function sets mHostEncoding.  While it would
     // be nice to avoid side-effects in this function, the implementation of
     // this function is already somewhat bound to the behavior of the
     // callsites.  Anyways, this function exists to avoid code duplication, so
     // side-effects abound :-/
     NS_ASSERTION(mHostEncoding == eEncoding_ASCII, "unexpected default encoding");
     bool isASCII;
     if (!gIDN) {
         nsCOMPtr<nsIIDNService> serv(do_GetService(NS_IDNSERVICE_CONTRACTID));
         if (serv) {
             NS_ADDREF(gIDN = serv.get());
         }
     }
     if (gIDN &&
         NS_SUCCEEDED(gIDN->ConvertToDisplayIDN(host, &isASCII, result))) {
         if (!isASCII)
           mHostEncoding = eEncoding_UTF8;
         return true;
     }
     result.Truncate();
     return false;
 }
 void
 nsStandardURL::CoalescePath(netCoalesceFlags coalesceFlag, char *path)
 {
     net_CoalesceDirs(coalesceFlag, path);
     int32_t newLen = strlen(path);
     if (newLen < mPath.mLen) {
         int32_t diff = newLen - mPath.mLen;
         mPath.mLen = newLen;
         mDirectory.mLen += diff;
         mFilepath.mLen += diff;
         ShiftFromBasename(diff);
     }
 }
 uint32_t
 nsStandardURL::AppendSegmentToBuf(char *buf, uint32_t i, const char *str, URLSegment &seg, const nsCString *escapedStr, bool useEscaped)
 {
     if (seg.mLen > 0) {
         if (useEscaped) {
             seg.mLen = escapedStr->Length();
             memcpy(buf + i, escapedStr->get(), seg.mLen);
         }
         else
             memcpy(buf + i, str + seg.mPos, seg.mLen);
         seg.mPos = i;
         i += seg.mLen;
     } else {
         seg.mPos = i;
     }
     return i;
 }
 uint32_t
 nsStandardURL::AppendToBuf(char *buf, uint32_t i, const char *str, uint32_t len)
 {
     memcpy(buf + i, str, len);
     return i + len;
 }
 // basic algorithm:
 //  1- escape url segments (for improved GetSpec efficiency)
 //  2- allocate spec buffer
 //  3- write url segments
 //  4- update url segment positions and lengths
 nsresult
 nsStandardURL::BuildNormalizedSpec(const char *spec)
 {
     // Assumptions: all member URLSegments must be relative the |spec| argument
     // passed to this function.
     // buffers for holding escaped url segments (these will remain empty unless
     // escaping is required).
     nsAutoCString encUsername, encPassword, encHost, encDirectory,
       encBasename, encExtension, encQuery, encRef;
     bool useEncUsername, useEncPassword, useEncHost = false,
       useEncDirectory, useEncBasename, useEncExtension, useEncQuery, useEncRef;
     nsAutoCString portbuf;
     //
     // escape each URL segment, if necessary, and calculate approximate normalized
     // spec length.
     //
     // [scheme://][username[:password]@]host[:port]/path[?query_string][#ref]
     uint32_t approxLen = 0;
     // the scheme is already ASCII
     if (mScheme.mLen > 0)
         approxLen += mScheme.mLen + 3; // includes room for "://", which we insert always
     // encode URL segments; convert UTF-8 to origin charset and possibly escape.
     // results written to encXXX variables only if |spec| is not already in the
     // appropriate encoding.
     {
         GET_SEGMENT_ENCODER(encoder);
         GET_QUERY_ENCODER(queryEncoder);
         // Items using an extraLen of 1 don't add anything unless mLen > 0
         // Username@
         approxLen += encoder.EncodeSegmentCount(spec, mUsername,  esc_Username,      encUsername,  useEncUsername, 1);
         // :password - we insert the ':' even if there's no actual password if "user:@" was in the spec
         if (mPassword.mLen >= 0)
             approxLen += 1 + encoder.EncodeSegmentCount(spec, mPassword,  esc_Password,      encPassword,  useEncPassword);
         // mHost is handled differently below due to encoding differences
         NS_ABORT_IF_FALSE(mPort >= -1, "Invalid negative mPort");
         if (mPort != -1 && mPort != mDefaultPort)
         {
             // :port
             portbuf.AppendInt(mPort);
             approxLen += portbuf.Length() + 1;
         }
         approxLen += 1; // reserve space for possible leading '/' - may not be needed
         // Should just use mPath?  These are pessimistic, and thus waste space
         approxLen += encoder.EncodeSegmentCount(spec, mDirectory, esc_Directory,     encDirectory, useEncDirectory, 1);
         approxLen += encoder.EncodeSegmentCount(spec, mBasename,  esc_FileBaseName,  encBasename,  useEncBasename);
         approxLen += encoder.EncodeSegmentCount(spec, mExtension, esc_FileExtension, encExtension, useEncExtension, 1);
         // These next ones *always* add their leading character even if length is 0
         // Handles items like "http://#"
         // ?query
         if (mQuery.mLen >= 0)
             approxLen += 1 + queryEncoder.EncodeSegmentCount(spec, mQuery, esc_Query,        encQuery,     useEncQuery);
         // #ref
         if (mRef.mLen >= 0)
             approxLen += 1 + encoder.EncodeSegmentCount(spec, mRef,       esc_Ref,           encRef,       useEncRef);
     }
     // do not escape the hostname, if IPv6 address literal, mHost will
     // already point to a [ ] delimited IPv6 address literal.
     // However, perform Unicode normalization on it, as IDN does.
     mHostEncoding = eEncoding_ASCII;
     // Note that we don't disallow URLs without a host - file:, etc
     if (mHost.mLen > 0) {
         const nsCSubstring& tempHost =
             Substring(spec + mHost.mPos, spec + mHost.mPos + mHost.mLen);
         if (tempHost.FindChar('\0') != kNotFound)
             return NS_ERROR_MALFORMED_URI;  // null embedded in hostname
         if (tempHost.FindChar(' ') != kNotFound)
             return NS_ERROR_MALFORMED_URI;  // don't allow spaces in the hostname
         if ((useEncHost = NormalizeIDN(tempHost, encHost)))
             approxLen += encHost.Length();
         else
             approxLen += mHost.mLen;
     }
     //
     // generate the normalized URL string
     //
     // approxLen should be correct or 1 high
     if (!mSpec.SetLength(approxLen+1, mozilla::fallible_t())) // buf needs a trailing '\0' below
         return NS_ERROR_OUT_OF_MEMORY;
     char *buf;
     mSpec.BeginWriting(buf);
     uint32_t i = 0;
     if (mScheme.mLen > 0) {
         i = AppendSegmentToBuf(buf, i, spec, mScheme);
         net_ToLowerCase(buf + mScheme.mPos, mScheme.mLen);
         i = AppendToBuf(buf, i, "://", 3);
     }
     // record authority starting position
     mAuthority.mPos = i;
     // append authority
     if (mUsername.mLen > 0) {
         i = AppendSegmentToBuf(buf, i, spec, mUsername, &encUsername, useEncUsername);
         if (mPassword.mLen >= 0) {
             buf[i++] = ':';
             i = AppendSegmentToBuf(buf, i, spec, mPassword, &encPassword, useEncPassword);
         }
         buf[i++] = '@';
     }
     if (mHost.mLen > 0) {
         i = AppendSegmentToBuf(buf, i, spec, mHost, &encHost, useEncHost);
         net_ToLowerCase(buf + mHost.mPos, mHost.mLen);
         NS_ABORT_IF_FALSE(mPort >= -1, "Invalid negative mPort");
         if (mPort != -1 && mPort != mDefaultPort) {
             buf[i++] = ':';
             // Already formatted while building approxLen
             i = AppendToBuf(buf, i, portbuf.get(), portbuf.Length());
         }
     }
     // record authority length
     mAuthority.mLen = i - mAuthority.mPos;
     // path must always start with a "/"
     if (mPath.mLen <= 0) {
         LOG(("setting path=/"));
         mDirectory.mPos = mFilepath.mPos = mPath.mPos = i;
         mDirectory.mLen = mFilepath.mLen = mPath.mLen = 1;
         // basename must exist, even if empty (bug 113508)
         mBasename.mPos = i+1;
         mBasename.mLen = 0;
         buf[i++] = '/';
     }
     else {
         uint32_t leadingSlash = 0;
         if (spec[mPath.mPos] != '/') {
             LOG(("adding leading slash to path\n"));
             leadingSlash = 1;
             buf[i++] = '/';
             // basename must exist, even if empty (bugs 113508, 429347)
             if (mBasename.mLen == -1) {
                 mBasename.mPos = i;
                 mBasename.mLen = 0;
             }
         }
         // record corrected (file)path starting position
         mPath.mPos = mFilepath.mPos = i - leadingSlash;
         i = AppendSegmentToBuf(buf, i, spec, mDirectory, &encDirectory, useEncDirectory);
         // the directory must end with a '/'
         if (buf[i-1] != '/') {
             buf[i++] = '/';
             mDirectory.mLen++;
         }
         i = AppendSegmentToBuf(buf, i, spec, mBasename, &encBasename, useEncBasename);
         // make corrections to directory segment if leadingSlash
         if (leadingSlash) {
             mDirectory.mPos = mPath.mPos;
             if (mDirectory.mLen >= 0)
                 mDirectory.mLen += leadingSlash;
             else
                 mDirectory.mLen = 1;
         }
         if (mExtension.mLen >= 0) {
             buf[i++] = '.';
             i = AppendSegmentToBuf(buf, i, spec, mExtension, &encExtension, useEncExtension);
         }
         // calculate corrected filepath length
         mFilepath.mLen = i - mFilepath.mPos;
         if (mQuery.mLen >= 0) {
             buf[i++] = '?';
             i = AppendSegmentToBuf(buf, i, spec, mQuery, &encQuery, useEncQuery);
         }
         if (mRef.mLen >= 0) {
             buf[i++] = '#';
             i = AppendSegmentToBuf(buf, i, spec, mRef, &encRef, useEncRef);
         }
         // calculate corrected path length
         mPath.mLen = i - mPath.mPos;
     }
     buf[i] = '\0';
     if (mDirectory.mLen > 1) {
         netCoalesceFlags coalesceFlag = NET_COALESCE_NORMAL;
         if (SegmentIs(buf,mScheme,"ftp")) {
             coalesceFlag = (netCoalesceFlags) (coalesceFlag
                                         | NET_COALESCE_ALLOW_RELATIVE_ROOT
                                         | NET_COALESCE_DOUBLE_SLASH_IS_ROOT);
         }
         CoalescePath(coalesceFlag, buf + mDirectory.mPos);
     }
     mSpec.SetLength(strlen(buf));
     NS_ASSERTION(mSpec.Length() <= approxLen, "We've overflowed the mSpec buffer!");
     return NS_OK;
 }
 bool
 nsStandardURL::SegmentIs(const URLSegment &seg, const char *val, bool ignoreCase)
 {
     // one or both may be null
     if (!val || mSpec.IsEmpty())
         return (!val && (mSpec.IsEmpty() || seg.mLen < 0));
     if (seg.mLen < 0)
         return false;
     // if the first |seg.mLen| chars of |val| match, then |val| must
     // also be null terminated at |seg.mLen|.
     if (ignoreCase)
         return !PL_strncasecmp(mSpec.get() + seg.mPos, val, seg.mLen)
             && (val[seg.mLen] == '\0');
     else
         return !strncmp(mSpec.get() + seg.mPos, val, seg.mLen)
             && (val[seg.mLen] == '\0');
 }
 bool
 nsStandardURL::SegmentIs(const char* spec, const URLSegment &seg, const char *val, bool ignoreCase)
 {
     // one or both may be null
     if (!val || !spec)
         return (!val && (!spec || seg.mLen < 0));
     if (seg.mLen < 0)
         return false;
     // if the first |seg.mLen| chars of |val| match, then |val| must
     // also be null terminated at |seg.mLen|.
     if (ignoreCase)
         return !PL_strncasecmp(spec + seg.mPos, val, seg.mLen)
             && (val[seg.mLen] == '\0');
     else
         return !strncmp(spec + seg.mPos, val, seg.mLen)
             && (val[seg.mLen] == '\0');
 }
 bool
 nsStandardURL::SegmentIs(const URLSegment &seg1, const char *val, const URLSegment &seg2, bool ignoreCase)
 {
     if (seg1.mLen != seg2.mLen)
         return false;
     if (seg1.mLen == -1 || (!val && mSpec.IsEmpty()))
         return true; // both are empty
     if (!val)
         return false;
     if (ignoreCase)
         return !PL_strncasecmp(mSpec.get() + seg1.mPos, val + seg2.mPos, seg1.mLen);
     else
         return !strncmp(mSpec.get() + seg1.mPos, val + seg2.mPos, seg1.mLen);
 }
 int32_t
 nsStandardURL::ReplaceSegment(uint32_t pos, uint32_t len, const char *val, uint32_t valLen)
 {
     if (val && valLen) {
         if (len == 0)
             mSpec.Insert(val, pos, valLen);
         else
             mSpec.Replace(pos, len, nsDependentCString(val, valLen));
         return valLen - len;
     }
     // else remove the specified segment
     mSpec.Cut(pos, len);
     return -int32_t(len);
 }
 int32_t
 nsStandardURL::ReplaceSegment(uint32_t pos, uint32_t len, const nsACString &val)
 {
     if (len == 0)
         mSpec.Insert(val, pos);
     else
         mSpec.Replace(pos, len, val);
     return val.Length() - len;
 }
 nsresult
 nsStandardURL::ParseURL(const char *spec, int32_t specLen)
 {
     nsresult rv;
     //
     // parse given URL string
     //
     rv = mParser->ParseURL(spec, specLen,
                            &mScheme.mPos, &mScheme.mLen,
                            &mAuthority.mPos, &mAuthority.mLen,
                            &mPath.mPos, &mPath.mLen);
     if (NS_FAILED(rv)) return rv;
 #ifdef DEBUG
     if (mScheme.mLen <= 0) {
         printf("spec=%s\n", spec);
         NS_WARNING("malformed url: no scheme");
     }
 #endif
     if (mAuthority.mLen > 0) {
         rv = mParser->ParseAuthority(spec + mAuthority.mPos, mAuthority.mLen,
                                      &mUsername.mPos, &mUsername.mLen,
                                      &mPassword.mPos, &mPassword.mLen,
                                      &mHost.mPos, &mHost.mLen,
                                      &mPort);
         if (NS_FAILED(rv)) return rv;
         // Don't allow mPort to be set to this URI's default port
         if (mPort == mDefaultPort)
             mPort = -1;
         mUsername.mPos += mAuthority.mPos;
         mPassword.mPos += mAuthority.mPos;
         mHost.mPos += mAuthority.mPos;
     }
     if (mPath.mLen > 0)
         rv = ParsePath(spec, mPath.mPos, mPath.mLen);
     return rv;
 }
 nsresult
 nsStandardURL::ParsePath(const char *spec, uint32_t pathPos, int32_t pathLen)
 {
     LOG(("ParsePath: %s pathpos %d len %d\n",spec,pathPos,pathLen));
     nsresult rv = mParser->ParsePath(spec + pathPos, pathLen,
                                      &mFilepath.mPos, &mFilepath.mLen,
                                      &mQuery.mPos, &mQuery.mLen,
                                      &mRef.mPos, &mRef.mLen);
     if (NS_FAILED(rv)) return rv;
     mFilepath.mPos += pathPos;
     mQuery.mPos += pathPos;
     mRef.mPos += pathPos;
     if (mFilepath.mLen > 0) {
         rv = mParser->ParseFilePath(spec + mFilepath.mPos, mFilepath.mLen,
                                     &mDirectory.mPos, &mDirectory.mLen,
                                     &mBasename.mPos, &mBasename.mLen,
                                     &mExtension.mPos, &mExtension.mLen);
         if (NS_FAILED(rv)) return rv;
         mDirectory.mPos += mFilepath.mPos;
         mBasename.mPos += mFilepath.mPos;
         mExtension.mPos += mFilepath.mPos;
     }
     return NS_OK;
 }
 char *
 nsStandardURL::AppendToSubstring(uint32_t pos,
                                  int32_t len,
                                  const char *tail)
 {
     // Verify pos and length are within boundaries
     if (pos > mSpec.Length())
         return nullptr;
     if (len < 0)
         return nullptr;
     if ((uint32_t)len > (mSpec.Length() - pos))
         return nullptr;
     if (!tail)
         return nullptr;
     uint32_t tailLen = strlen(tail);
     // Check for int overflow for proposed length of combined string
     if (UINT32_MAX - ((uint32_t)len + 1) < tailLen)
         return nullptr;
     char *result = (char *) NS_Alloc(len + tailLen + 1);
     if (result) {
         memcpy(result, mSpec.get() + pos, len);
         memcpy(result + len, tail, tailLen);
         result[len + tailLen] = '\0';
     }
     return result;
 }
 nsresult
 nsStandardURL::ReadSegment(nsIBinaryInputStream *stream, URLSegment &seg)
 {
     nsresult rv;
     rv = stream->Read32(&seg.mPos);
     if (NS_FAILED(rv)) return rv;
     rv = stream->Read32((uint32_t *) &seg.mLen);
     if (NS_FAILED(rv)) return rv;
     return NS_OK;
 }
 nsresult
 nsStandardURL::WriteSegment(nsIBinaryOutputStream *stream, const URLSegment &seg)
 {
     nsresult rv;
     rv = stream->Write32(seg.mPos);
     if (NS_FAILED(rv)) return rv;
     rv = stream->Write32(uint32_t(seg.mLen));
     if (NS_FAILED(rv)) return rv;
     return NS_OK;
 }
 /* static */ void
 nsStandardURL::PrefsChanged(nsIPrefBranch *prefs, const char *pref)
 {
     bool val;
     LOG(("nsStandardURL::PrefsChanged [pref=%s]\n", pref));
 #define PREF_CHANGED(p) ((pref == nullptr) || !strcmp(pref, p))
 #define GOT_PREF(p, b) (NS_SUCCEEDED(prefs->GetBoolPref(p, &b)))
     if (PREF_CHANGED(NS_NET_PREF_ESCAPEUTF8)) {
         if (GOT_PREF(NS_NET_PREF_ESCAPEUTF8, val))
             gEscapeUTF8 = val;
         LOG(("escape UTF-8 %s\n", gEscapeUTF8 ? "enabled" : "disabled"));
     }
     if (PREF_CHANGED(NS_NET_PREF_ALWAYSENCODEINUTF8)) {
         if (GOT_PREF(NS_NET_PREF_ALWAYSENCODEINUTF8, val))
             gAlwaysEncodeInUTF8 = val;
         LOG(("encode in UTF-8 %s\n", gAlwaysEncodeInUTF8 ? "enabled" : "disabled"));
     }
 #undef PREF_CHANGED
 #undef GOT_PREF
 }
 //----------------------------------------------------------------------------
 // nsStandardURL::nsISupports
 //----------------------------------------------------------------------------
 NS_IMPL_ADDREF(nsStandardURL)
 NS_IMPL_RELEASE(nsStandardURL)
 NS_INTERFACE_MAP_BEGIN(nsStandardURL)
     NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStandardURL)
     NS_INTERFACE_MAP_ENTRY(nsIURI)
     NS_INTERFACE_MAP_ENTRY(nsIURL)
     NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIFileURL, mSupportsFileURL)
     NS_INTERFACE_MAP_ENTRY(nsIStandardURL)
     NS_INTERFACE_MAP_ENTRY(nsISerializable)
     NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
     NS_INTERFACE_MAP_ENTRY(nsIMutable)
     NS_INTERFACE_MAP_ENTRY(nsIIPCSerializableURI)
     // see nsStandardURL::Equals
     if (aIID.Equals(kThisImplCID))
         foundInterface = static_cast<nsIURI *>(this);
     else
     NS_INTERFACE_MAP_ENTRY(nsISizeOf)
 NS_INTERFACE_MAP_END
 //----------------------------------------------------------------------------
 // nsStandardURL::nsIURI
 //----------------------------------------------------------------------------
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetSpec(nsACString &result)
 {
     result = mSpec;
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetSpecIgnoringRef(nsACString &result)
 {
     // URI without ref is 0 to one char before ref
     if (mRef.mLen >= 0) {
         URLSegment noRef(0, mRef.mPos - 1);
         result = Segment(noRef);
     } else {
         result = mSpec;
     }
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetPrePath(nsACString &result)
 {
     result = Prepath();
     return NS_OK;
 }
 // result is strictly US-ASCII
 NS_IMETHODIMP
 nsStandardURL::GetScheme(nsACString &result)
 {
     result = Scheme();
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetUserPass(nsACString &result)
 {
     result = Userpass();
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetUsername(nsACString &result)
 {
     result = Username();
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetPassword(nsACString &result)
 {
     result = Password();
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetHostPort(nsACString &result)
 {
     result = Hostport();
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetHost(nsACString &result)
 {
     result = Host();
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetPort(int32_t *result)
 {
     *result = mPort;
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetPath(nsACString &result)
 {
     result = Path();
     return NS_OK;
 }
 // result is ASCII
 NS_IMETHODIMP
 nsStandardURL::GetAsciiSpec(nsACString &result)
 {
     if (mSpecEncoding == eEncoding_Unknown) {
         if (IsASCII(mSpec))
             mSpecEncoding = eEncoding_ASCII;
         else
             mSpecEncoding = eEncoding_UTF8;
     }
     if (mSpecEncoding == eEncoding_ASCII) {
         result = mSpec;
         return NS_OK;
     }
     // try to guess the capacity required for result...
     result.SetCapacity(mSpec.Length() + std::min<uint32_t>(32, mSpec.Length()/10));
     result = Substring(mSpec, 0, mScheme.mLen + 3);
     NS_EscapeURL(Userpass(true), esc_OnlyNonASCII | esc_AlwaysCopy, result);
     // get escaped host
     nsAutoCString escHostport;
     if (mHost.mLen > 0) {
         // this doesn't fail
         (void) GetAsciiHost(escHostport);
         // escHostport = "hostA" + ":port"
         uint32_t pos = mHost.mPos + mHost.mLen;
         if (pos < mPath.mPos)
             escHostport += Substring(mSpec, pos, mPath.mPos - pos);
     }
     result += escHostport;
     NS_EscapeURL(Path(), esc_OnlyNonASCII | esc_AlwaysCopy, result);
     return NS_OK;
 }
 // result is ASCII
 NS_IMETHODIMP
 nsStandardURL::GetAsciiHost(nsACString &result)
 {
     if (mHostEncoding == eEncoding_ASCII) {
         result = Host();
         return NS_OK;
     }
     // perhaps we have it cached...
     if (mHostA) {
         result = mHostA;
         return NS_OK;
     }
     if (gIDN) {
         nsresult rv;
         rv = gIDN->ConvertUTF8toACE(Host(), result);
         if (NS_SUCCEEDED(rv)) {
             mHostA = ToNewCString(result);
             return NS_OK;
         }
         NS_WARNING("nsIDNService::ConvertUTF8toACE failed");
     }
     // something went wrong... guess all we can do is URL escape :-/
     NS_EscapeURL(Host(), esc_OnlyNonASCII | esc_AlwaysCopy, result);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetOriginCharset(nsACString &result)
 {
     if (mOriginCharset.IsEmpty())
         result.AssignLiteral("UTF-8");
     else
         result = mOriginCharset;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetSpec(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &flat = PromiseFlatCString(input);
     const char *spec = flat.get();
     int32_t specLength = flat.Length();
     LOG(("nsStandardURL::SetSpec [spec=%s]\n", spec));
     Clear();
     if (!spec || !*spec)
         return NS_OK;
     // filter out unexpected chars "\r\n\t" if necessary
     nsAutoCString buf1;
     if (net_FilterURIString(spec, buf1)) {
         spec = buf1.get();
         specLength = buf1.Length();
     }
     // parse the given URL...
     nsresult rv = ParseURL(spec, specLength);
     if (NS_SUCCEEDED(rv)) {
         // finally, use the URLSegment member variables to build a normalized
         // copy of |spec|
         rv = BuildNormalizedSpec(spec);
     }
     if (NS_FAILED(rv)) {
         Clear();
         return rv;
     }
 #if defined(PR_LOGGING)
     if (LOG_ENABLED()) {
         LOG((" spec      = %s\n", mSpec.get()));
         LOG((" port      = %d\n", mPort));
         LOG((" scheme    = (%u,%d)\n", mScheme.mPos,    mScheme.mLen));
         LOG((" authority = (%u,%d)\n", mAuthority.mPos, mAuthority.mLen));
         LOG((" username  = (%u,%d)\n", mUsername.mPos,  mUsername.mLen));
         LOG((" password  = (%u,%d)\n", mPassword.mPos,  mPassword.mLen));
         LOG((" hostname  = (%u,%d)\n", mHost.mPos,      mHost.mLen));
         LOG((" path      = (%u,%d)\n", mPath.mPos,      mPath.mLen));
         LOG((" filepath  = (%u,%d)\n", mFilepath.mPos,  mFilepath.mLen));
         LOG((" directory = (%u,%d)\n", mDirectory.mPos, mDirectory.mLen));
         LOG((" basename  = (%u,%d)\n", mBasename.mPos,  mBasename.mLen));
         LOG((" extension = (%u,%d)\n", mExtension.mPos, mExtension.mLen));
         LOG((" query     = (%u,%d)\n", mQuery.mPos,     mQuery.mLen));
         LOG((" ref       = (%u,%d)\n", mRef.mPos,       mRef.mLen));
     }
 #endif
     return rv;
 }
 NS_IMETHODIMP
 nsStandardURL::SetScheme(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &scheme = PromiseFlatCString(input);
     LOG(("nsStandardURL::SetScheme [scheme=%s]\n", scheme.get()));
     if (scheme.IsEmpty()) {
         NS_WARNING("cannot remove the scheme from an url");
         return NS_ERROR_UNEXPECTED;
     }
     if (mScheme.mLen < 0) {
         NS_WARNING("uninitialized");
         return NS_ERROR_NOT_INITIALIZED;
     }
     if (!net_IsValidScheme(scheme)) {
         NS_WARNING("the given url scheme contains invalid characters");
         return NS_ERROR_UNEXPECTED;
     }
     InvalidateCache();
     int32_t shift = ReplaceSegment(mScheme.mPos, mScheme.mLen, scheme);
     if (shift) {
         mScheme.mLen = scheme.Length();
         ShiftFromAuthority(shift);
     }
     // ensure new scheme is lowercase
     //
     // XXX the string code unfortunately doesn't provide a ToLowerCase
     //     that operates on a substring.
     net_ToLowerCase((char *) mSpec.get(), mScheme.mLen);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetUserPass(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &userpass = PromiseFlatCString(input);
     LOG(("nsStandardURL::SetUserPass [userpass=%s]\n", userpass.get()));
     if (mURLType == URLTYPE_NO_AUTHORITY) {
         if (userpass.IsEmpty())
             return NS_OK;
         NS_WARNING("cannot set user:pass on no-auth url");
         return NS_ERROR_UNEXPECTED;
     }
     if (mAuthority.mLen < 0) {
         NS_WARNING("uninitialized");
         return NS_ERROR_NOT_INITIALIZED;
     }
     InvalidateCache();
     if (userpass.IsEmpty()) {
         // remove user:pass
         if (mUsername.mLen > 0) {
             if (mPassword.mLen > 0)
                 mUsername.mLen += (mPassword.mLen + 1);
             mUsername.mLen++;
             mSpec.Cut(mUsername.mPos, mUsername.mLen);
             mAuthority.mLen -= mUsername.mLen;
             ShiftFromHost(-mUsername.mLen);
             mUsername.mLen = -1;
             mPassword.mLen = -1;
         }
         return NS_OK;
     }
     NS_ASSERTION(mHost.mLen >= 0, "uninitialized");
     nsresult rv;
     uint32_t usernamePos, passwordPos;
     int32_t usernameLen, passwordLen;
     rv = mParser->ParseUserInfo(userpass.get(), userpass.Length(),
                                 &usernamePos, &usernameLen,
                                 &passwordPos, &passwordLen);
     if (NS_FAILED(rv)) return rv;
     // build new user:pass in |buf|
     nsAutoCString buf;
     if (usernameLen > 0) {
         GET_SEGMENT_ENCODER(encoder);
         bool ignoredOut;
         usernameLen = encoder.EncodeSegmentCount(userpass.get(),
                                                  URLSegment(usernamePos,
                                                             usernameLen),
                                                  esc_Username | esc_AlwaysCopy,
                                                  buf, ignoredOut);
         if (passwordLen >= 0) {
             buf.Append(':');
             passwordLen = encoder.EncodeSegmentCount(userpass.get(),
                                                      URLSegment(passwordPos,
                                                                 passwordLen),
                                                      esc_Password |
                                                      esc_AlwaysCopy, buf,
                                                      ignoredOut);
         }
         if (mUsername.mLen < 0)
             buf.Append('@');
     }
     uint32_t shift = 0;
     if (mUsername.mLen < 0) {
         // no existing user:pass
         if (!buf.IsEmpty()) {
             mSpec.Insert(buf, mHost.mPos);
             mUsername.mPos = mHost.mPos;
             shift = buf.Length();
         }
     }
     else {
         // replace existing user:pass
         uint32_t userpassLen = mUsername.mLen;
         if (mPassword.mLen >= 0)
             userpassLen += (mPassword.mLen + 1);
         mSpec.Replace(mUsername.mPos, userpassLen, buf);
         shift = buf.Length() - userpassLen;
     }
     if (shift) {
         ShiftFromHost(shift);
         mAuthority.mLen += shift;
     }
     // update positions and lengths
     mUsername.mLen = usernameLen;
     mPassword.mLen = passwordLen;
     if (passwordLen)
         mPassword.mPos = mUsername.mPos + mUsername.mLen + 1;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetUsername(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &username = PromiseFlatCString(input);
     LOG(("nsStandardURL::SetUsername [username=%s]\n", username.get()));
     if (mURLType == URLTYPE_NO_AUTHORITY) {
         if (username.IsEmpty())
             return NS_OK;
         NS_WARNING("cannot set username on no-auth url");
         return NS_ERROR_UNEXPECTED;
     }
     if (username.IsEmpty())
         return SetUserPass(username);
     InvalidateCache();
     // escape username if necessary
     nsAutoCString buf;
     GET_SEGMENT_ENCODER(encoder);
     const nsACString &escUsername =
         encoder.EncodeSegment(username, esc_Username, buf);
     int32_t shift;
     if (mUsername.mLen < 0) {
         mUsername.mPos = mAuthority.mPos;
         mSpec.Insert(escUsername + NS_LITERAL_CSTRING("@"), mUsername.mPos);
         shift = escUsername.Length() + 1;
     }
     else
         shift = ReplaceSegment(mUsername.mPos, mUsername.mLen, escUsername);
     if (shift) {
         mUsername.mLen = escUsername.Length();
         mAuthority.mLen += shift;
         ShiftFromPassword(shift);
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetPassword(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &password = PromiseFlatCString(input);
     LOG(("nsStandardURL::SetPassword [password=%s]\n", password.get()));
     if (mURLType == URLTYPE_NO_AUTHORITY) {
         if (password.IsEmpty())
             return NS_OK;
         NS_WARNING("cannot set password on no-auth url");
         return NS_ERROR_UNEXPECTED;
     }
     if (mUsername.mLen <= 0) {
         NS_WARNING("cannot set password without existing username");
         return NS_ERROR_FAILURE;
     }
     InvalidateCache();
     if (password.IsEmpty()) {
         if (mPassword.mLen >= 0) {
             // cut(":password")
             mSpec.Cut(mPassword.mPos - 1, mPassword.mLen + 1);
             ShiftFromHost(-(mPassword.mLen + 1));
             mAuthority.mLen -= (mPassword.mLen + 1);
             mPassword.mLen = -1;
         }
         return NS_OK;
     }
     // escape password if necessary
     nsAutoCString buf;
     GET_SEGMENT_ENCODER(encoder);
     const nsACString &escPassword =
         encoder.EncodeSegment(password, esc_Password, buf);
     int32_t shift;
     if (mPassword.mLen < 0) {
         mPassword.mPos = mUsername.mPos + mUsername.mLen + 1;
         mSpec.Insert(NS_LITERAL_CSTRING(":") + escPassword, mPassword.mPos - 1);
         shift = escPassword.Length() + 1;
     }
     else
         shift = ReplaceSegment(mPassword.mPos, mPassword.mLen, escPassword);
     if (shift) {
         mPassword.mLen = escPassword.Length();
         mAuthority.mLen += shift;
         ShiftFromHost(shift);
     }
     return NS_OK;
 }
 void
 nsStandardURL::FindHostLimit(nsACString::const_iterator& aStart,
                              nsACString::const_iterator& aEnd)
 {
   for (int32_t i = 0; gHostLimitDigits[i]; ++i) {
     nsACString::const_iterator c(aStart);
     if (FindCharInReadable(gHostLimitDigits[i], c, aEnd)) {
       aEnd = c;
     }
   }
 }
 NS_IMETHODIMP
 nsStandardURL::SetHostPort(const nsACString &aValue)
 {
     ENSURE_MUTABLE();
   // We cannot simply call nsIURI::SetHost because that would treat the name as
   // an IPv6 address (like http:://[server:443]/).  We also cannot call
   // nsIURI::SetHostPort because that isn't implemented.  Sadfaces.
   // First set the hostname.
   nsACString::const_iterator start, end;
   aValue.BeginReading(start);
   aValue.EndReading(end);
   nsACString::const_iterator iter(start);
   FindHostLimit(iter, end);
   FindCharInReadable(':', iter, end);
   nsresult rv = SetHost(Substring(start, iter));
   NS_ENSURE_SUCCESS(rv, rv);
   // Also set the port if needed.
   if (iter != end) {
     iter++;
     if (iter != end) {
       nsCString portStr(Substring(iter, end));
       nsresult rv;
       int32_t port = portStr.ToInteger(&rv);
       if (NS_SUCCEEDED(rv)) {
         rv = SetPort(port);
         NS_ENSURE_SUCCESS(rv, rv);
       }
     }
   }
   return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetHost(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &hostname = PromiseFlatCString(input);
     nsACString::const_iterator start, end;
     hostname.BeginReading(start);
     hostname.EndReading(end);
     FindHostLimit(start, end);
     const nsCString flat(Substring(start, end));
     const char *host = flat.get();
     LOG(("nsStandardURL::SetHost [host=%s]\n", host));
     if (mURLType == URLTYPE_NO_AUTHORITY) {
         if (flat.IsEmpty())
             return NS_OK;
         NS_WARNING("cannot set host on no-auth url");
         return NS_ERROR_UNEXPECTED;
     } else {
         if (flat.IsEmpty()) {
             // Setting an empty hostname is not allowed for
             // URLTYPE_STANDARD and URLTYPE_AUTHORITY.
             return NS_ERROR_UNEXPECTED;
         }
     }
     if (strlen(host) < flat.Length())
         return NS_ERROR_MALFORMED_URI; // found embedded null
     // For consistency with SetSpec/nsURLParsers, don't allow spaces
     // in the hostname.
     if (strchr(host, ' '))
         return NS_ERROR_MALFORMED_URI;
     InvalidateCache();
     mHostEncoding = eEncoding_ASCII;
     if (!*host) {
         // remove existing hostname
         if (mHost.mLen > 0) {
             // remove entire authority
             mSpec.Cut(mAuthority.mPos, mAuthority.mLen);
             ShiftFromPath(-mAuthority.mLen);
             mAuthority.mLen = 0;
             mUsername.mLen = -1;
             mPassword.mLen = -1;
             mHost.mLen = -1;
             mPort = -1;
         }
         return NS_OK;
     }
     // handle IPv6 unescaped address literal
     int32_t len;
     nsAutoCString hostBuf;
     if (EscapeIPv6(host, hostBuf)) {
         host = hostBuf.get();
         len = hostBuf.Length();
     }
     else if (NormalizeIDN(flat, hostBuf)) {
         host = hostBuf.get();
         len = hostBuf.Length();
     }
     else
         len = flat.Length();
     if (mHost.mLen < 0) {
         int port_length = 0;
         if (mPort != -1) {
             nsAutoCString buf;
             buf.Assign(':');
             buf.AppendInt(mPort);
             port_length = buf.Length();
         }
         if (mAuthority.mLen > 0) {
             mHost.mPos = mAuthority.mPos + mAuthority.mLen - port_length;
             mHost.mLen = 0;
         } else if (mScheme.mLen > 0) {
             mHost.mPos = mScheme.mPos + mScheme.mLen + 3;
             mHost.mLen = 0;
         }
     }
     int32_t shift = ReplaceSegment(mHost.mPos, mHost.mLen, host, len);
     if (shift) {
         mHost.mLen = len;
         mAuthority.mLen += shift;
         ShiftFromPath(shift);
     }
     // Now canonicalize the host to lowercase
     net_ToLowerCase(mSpec.BeginWriting() + mHost.mPos, mHost.mLen);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetPort(int32_t port)
 {
     ENSURE_MUTABLE();
     LOG(("nsStandardURL::SetPort [port=%d]\n", port));
     if ((port == mPort) || (mPort == -1 && port == mDefaultPort))
         return NS_OK;
     // ports must be >= 0
     if (port < -1) // -1 == use default
         return NS_ERROR_MALFORMED_URI;
     if (mURLType == URLTYPE_NO_AUTHORITY) {
         NS_WARNING("cannot set port on no-auth url");
         return NS_ERROR_UNEXPECTED;
     }
     InvalidateCache();
     if (mPort == -1) {
         // need to insert the port number in the URL spec
         nsAutoCString buf;
         buf.Assign(':');
         buf.AppendInt(port);
         mSpec.Insert(buf, mAuthority.mPos + mAuthority.mLen);
         mAuthority.mLen += buf.Length();
         ShiftFromPath(buf.Length());
     }
     else if (port == -1 || port == mDefaultPort) {
         // Don't allow mPort == mDefaultPort
         port = -1;
         // compute length of the current port
         nsAutoCString buf;
         buf.Assign(':');
         buf.AppendInt(mPort);
         // need to remove the port number from the URL spec
         uint32_t start = mAuthority.mPos + mAuthority.mLen - buf.Length();
         int32_t lengthToCut = buf.Length();
         mSpec.Cut(start, lengthToCut);
         mAuthority.mLen -= lengthToCut;
         ShiftFromPath(-lengthToCut);
     }
     else {
         // need to replace the existing port
         nsAutoCString buf;
         buf.Assign(':');
         buf.AppendInt(mPort);
         uint32_t start = mAuthority.mPos + mAuthority.mLen - buf.Length();
         uint32_t length = buf.Length();
         buf.Assign(':');
         buf.AppendInt(port);
         mSpec.Replace(start, length, buf);
         if (buf.Length() != length) {
             mAuthority.mLen += buf.Length() - length;
             ShiftFromPath(buf.Length() - length);
         }
     }
     mPort = port;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetPath(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &path = PromiseFlatCString(input);
     LOG(("nsStandardURL::SetPath [path=%s]\n", path.get()));
     InvalidateCache();
     if (!path.IsEmpty()) {
         nsAutoCString spec;
         spec.Assign(mSpec.get(), mPath.mPos);
         if (path.First() != '/')
             spec.Append('/');
         spec.Append(path);
         return SetSpec(spec);
     }
     else if (mPath.mLen >= 1) {
         mSpec.Cut(mPath.mPos + 1, mPath.mLen - 1);
         // these contain only a '/'
         mPath.mLen = 1;
         mDirectory.mLen = 1;
         mFilepath.mLen = 1;
         // these are no longer defined
         mBasename.mLen = -1;
         mExtension.mLen = -1;
         mQuery.mLen = -1;
         mRef.mLen = -1;
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::Equals(nsIURI *unknownOther, bool *result)
 {
     return EqualsInternal(unknownOther, eHonorRef, result);
 }
 NS_IMETHODIMP
 nsStandardURL::EqualsExceptRef(nsIURI *unknownOther, bool *result)
 {
     return EqualsInternal(unknownOther, eIgnoreRef, result);
 }
 nsresult
 nsStandardURL::EqualsInternal(nsIURI *unknownOther,
                               nsStandardURL::RefHandlingEnum refHandlingMode,
                               bool *result)
 {
     NS_ENSURE_ARG_POINTER(unknownOther);
     NS_PRECONDITION(result, "null pointer");
     nsRefPtr<nsStandardURL> other;
     nsresult rv = unknownOther->QueryInterface(kThisImplCID,
                                                getter_AddRefs(other));
     if (NS_FAILED(rv)) {
         *result = false;
         return NS_OK;
     }
     // First, check whether one URIs is an nsIFileURL while the other
     // is not.  If that's the case, they're different.
     if (mSupportsFileURL != other->mSupportsFileURL) {
         *result = false;
         return NS_OK;
     }
     // Next check parts of a URI that, if different, automatically make the
     // URIs different
     if (!SegmentIs(mScheme, other->mSpec.get(), other->mScheme) ||
         // Check for host manually, since conversion to file will
         // ignore the host!
         !SegmentIs(mHost, other->mSpec.get(), other->mHost) ||
         !SegmentIs(mQuery, other->mSpec.get(), other->mQuery) ||
         !SegmentIs(mUsername, other->mSpec.get(), other->mUsername) ||
         !SegmentIs(mPassword, other->mSpec.get(), other->mPassword) ||
         Port() != other->Port()) {
         // No need to compare files or other URI parts -- these are different
         // beasties
         *result = false;
         return NS_OK;
     }
     if (refHandlingMode == eHonorRef &&
         !SegmentIs(mRef, other->mSpec.get(), other->mRef)) {
         *result = false;
         return NS_OK;
     }
     // Then check for exact identity of URIs.  If we have it, they're equal
     if (SegmentIs(mDirectory, other->mSpec.get(), other->mDirectory) &&
         SegmentIs(mBasename, other->mSpec.get(), other->mBasename) &&
         SegmentIs(mExtension, other->mSpec.get(), other->mExtension)) {
         *result = true;
         return NS_OK;
     }
     // At this point, the URIs are not identical, but they only differ in the
     // directory/filename/extension.  If these are file URLs, then get the
     // corresponding file objects and compare those, since two filenames that
     // differ, eg, only in case could still be equal.
     if (mSupportsFileURL) {
         // Assume not equal for failure cases... but failures in GetFile are
         // really failures, more or less, so propagate them to caller.
         *result = false;
         rv = EnsureFile();
         nsresult rv2 = other->EnsureFile();
         // special case for resource:// urls that don't resolve to files
         if (rv == NS_ERROR_NO_INTERFACE && rv == rv2)
             return NS_OK;
         if (NS_FAILED(rv)) {
             LOG(("nsStandardURL::Equals [this=%p spec=%s] failed to ensure file",
                 this, mSpec.get()));
             return rv;
         }
         NS_ASSERTION(mFile, "EnsureFile() lied!");
         rv = rv2;
         if (NS_FAILED(rv)) {
             LOG(("nsStandardURL::Equals [other=%p spec=%s] other failed to ensure file",
                  other.get(), other->mSpec.get()));
             return rv;
         }
         NS_ASSERTION(other->mFile, "EnsureFile() lied!");
         return mFile->Equals(other->mFile, result);
     }
     // The URLs are not identical, and they do not correspond to the
     // same file, so they are different.
     *result = false;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SchemeIs(const char *scheme, bool *result)
 {
     NS_PRECONDITION(result, "null pointer");
     *result = SegmentIs(mScheme, scheme);
     return NS_OK;
 }
 /* virtual */ nsStandardURL*
 nsStandardURL::StartClone()
 {
     nsStandardURL *clone = new nsStandardURL();
     return clone;
 }
 NS_IMETHODIMP
 nsStandardURL::Clone(nsIURI **result)
 {
     return CloneInternal(eHonorRef, result);
 }
 NS_IMETHODIMP
 nsStandardURL::CloneIgnoringRef(nsIURI **result)
 {
     return CloneInternal(eIgnoreRef, result);
 }
 nsresult
 nsStandardURL::CloneInternal(nsStandardURL::RefHandlingEnum refHandlingMode,
                              nsIURI **result)
 {
     nsRefPtr<nsStandardURL> clone = StartClone();
     if (!clone)
         return NS_ERROR_OUT_OF_MEMORY;
     clone->mSpec = mSpec;
     clone->mDefaultPort = mDefaultPort;
     clone->mPort = mPort;
     clone->mScheme = mScheme;
     clone->mAuthority = mAuthority;
     clone->mUsername = mUsername;
     clone->mPassword = mPassword;
     clone->mHost = mHost;
     clone->mPath = mPath;
     clone->mFilepath = mFilepath;
     clone->mDirectory = mDirectory;
     clone->mBasename = mBasename;
     clone->mExtension = mExtension;
     clone->mQuery = mQuery;
     clone->mRef = mRef;
     clone->mOriginCharset = mOriginCharset;
     clone->mURLType = mURLType;
     clone->mParser = mParser;
     clone->mFile = mFile;
     clone->mHostA = mHostA ? strdup(mHostA) : nullptr;
     clone->mMutable = true;
     clone->mSupportsFileURL = mSupportsFileURL;
     clone->mHostEncoding = mHostEncoding;
     clone->mSpecEncoding = mSpecEncoding;
     if (refHandlingMode == eIgnoreRef) {
         clone->SetRef(EmptyCString());
     }
     clone.forget(result);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::Resolve(const nsACString &in, nsACString &out)
 {
     const nsPromiseFlatCString &flat = PromiseFlatCString(in);
     const char *relpath = flat.get();
     // filter out unexpected chars "\r\n\t" if necessary
     nsAutoCString buf;
     int32_t relpathLen;
     if (net_FilterURIString(relpath, buf)) {
         relpath = buf.get();
         relpathLen = buf.Length();
     } else
         relpathLen = flat.Length();
     char *result = nullptr;
     LOG(("nsStandardURL::Resolve [this=%p spec=%s relpath=%s]\n",
         this, mSpec.get(), relpath));
     NS_ASSERTION(mParser, "no parser: unitialized");
     // NOTE: there is no need for this function to produce normalized
     // output.  normalization will occur when the result is used to
     // initialize a nsStandardURL object.
     if (mScheme.mLen < 0) {
         NS_WARNING("unable to Resolve URL: this URL not initialized");
         return NS_ERROR_NOT_INITIALIZED;
     }
     nsresult rv;
     URLSegment scheme;
     char *resultPath = nullptr;
     bool relative = false;
     uint32_t offset = 0;
     netCoalesceFlags coalesceFlag = NET_COALESCE_NORMAL;
     // relative urls should never contain a host, so we always want to use
     // the noauth url parser.
     // use it to extract a possible scheme
     rv = mParser->ParseURL(relpath,
                            relpathLen,
                            &scheme.mPos, &scheme.mLen,
                            nullptr, nullptr,
                            nullptr, nullptr);
     // if the parser fails (for example because there is no valid scheme)
     // reset the scheme and assume a relative url
     if (NS_FAILED(rv)) scheme.Reset();
     if (scheme.mLen >= 0) {
         // add some flags to coalesceFlag if it is an ftp-url
         // need this later on when coalescing the resulting URL
         if (SegmentIs(relpath, scheme, "ftp", true)) {
             coalesceFlag = (netCoalesceFlags) (coalesceFlag
                                         | NET_COALESCE_ALLOW_RELATIVE_ROOT
                                         | NET_COALESCE_DOUBLE_SLASH_IS_ROOT);
         }
         // this URL appears to be absolute
         // but try to find out more
         if (SegmentIs(mScheme, relpath, scheme, true)) {
             // mScheme and Scheme are the same
             // but this can still be relative
             if (nsCRT::strncmp(relpath + scheme.mPos + scheme.mLen,
                                "://",3) == 0) {
                 // now this is really absolute
                 // because a :// follows the scheme
                 result = NS_strdup(relpath);
             } else {
                 // This is a deprecated form of relative urls like
                 // http:file or http:/path/file
                 // we will support it for now ...
                 relative = true;
                 offset = scheme.mLen + 1;
             }
         } else {
             // the schemes are not the same, we are also done
             // because we have to assume this is absolute
             result = NS_strdup(relpath);
         }
     } else {
         // add some flags to coalesceFlag if it is an ftp-url
         // need this later on when coalescing the resulting URL
         if (SegmentIs(mScheme,"ftp")) {
             coalesceFlag = (netCoalesceFlags) (coalesceFlag
                                         | NET_COALESCE_ALLOW_RELATIVE_ROOT
                                         | NET_COALESCE_DOUBLE_SLASH_IS_ROOT);
         }
         if (relpath[0] == '/' && relpath[1] == '/') {
             // this URL //host/path is almost absolute
             result = AppendToSubstring(mScheme.mPos, mScheme.mLen + 1, relpath);
         } else {
             // then it must be relative
             relative = true;
         }
     }
     if (relative) {
         uint32_t len = 0;
         const char *realrelpath = relpath + offset;
         switch (*realrelpath) {
         case '/':
             // overwrite everything after the authority
             len = mAuthority.mPos + mAuthority.mLen;
             break;
         case '?':
             // overwrite the existing ?query and #ref
             if (mQuery.mLen >= 0)
                 len = mQuery.mPos - 1;
             else if (mRef.mLen >= 0)
                 len = mRef.mPos - 1;
             else
                 len = mPath.mPos + mPath.mLen;
             break;
         case '#':
         case '\0':
             // overwrite the existing #ref
             if (mRef.mLen < 0)
                 len = mPath.mPos + mPath.mLen;
             else
                 len = mRef.mPos - 1;
             break;
         default:
             if (coalesceFlag & NET_COALESCE_DOUBLE_SLASH_IS_ROOT) {
                 if (Filename().Equals(NS_LITERAL_CSTRING("%2F"),
                                       nsCaseInsensitiveCStringComparator())) {
                     // if ftp URL ends with %2F then simply
                     // append relative part because %2F also
                     // marks the root directory with ftp-urls
                     len = mFilepath.mPos + mFilepath.mLen;
                 } else {
                     // overwrite everything after the directory
                     len = mDirectory.mPos + mDirectory.mLen;
                 }
             } else {
                 // overwrite everything after the directory
                 len = mDirectory.mPos + mDirectory.mLen;
             }
         }
         result = AppendToSubstring(0, len, realrelpath);
         // locate result path
         resultPath = result + mPath.mPos;
     }
     if (!result)
         return NS_ERROR_OUT_OF_MEMORY;
     if (resultPath)
         net_CoalesceDirs(coalesceFlag, resultPath);
     else {
         // locate result path
         resultPath = PL_strstr(result, "://");
         if (resultPath) {
             resultPath = PL_strchr(resultPath + 3, '/');
             if (resultPath)
                 net_CoalesceDirs(coalesceFlag,resultPath);
         }
     }
     out.Adopt(result);
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetCommonBaseSpec(nsIURI *uri2, nsACString &aResult)
 {
     NS_ENSURE_ARG_POINTER(uri2);
     // if uri's are equal, then return uri as is
     bool isEquals = false;
     if (NS_SUCCEEDED(Equals(uri2, &isEquals)) && isEquals)
         return GetSpec(aResult);
     aResult.Truncate();
     // check pre-path; if they don't match, then return empty string
     nsStandardURL *stdurl2;
     nsresult rv = uri2->QueryInterface(kThisImplCID, (void **) &stdurl2);
     isEquals = NS_SUCCEEDED(rv)
             && SegmentIs(mScheme, stdurl2->mSpec.get(), stdurl2->mScheme)
             && SegmentIs(mHost, stdurl2->mSpec.get(), stdurl2->mHost)
             && SegmentIs(mUsername, stdurl2->mSpec.get(), stdurl2->mUsername)
             && SegmentIs(mPassword, stdurl2->mSpec.get(), stdurl2->mPassword)
             && (Port() == stdurl2->Port());
     if (!isEquals)
     {
         if (NS_SUCCEEDED(rv))
             NS_RELEASE(stdurl2);
         return NS_OK;
     }
     // scan for first mismatched character
     const char *thisIndex, *thatIndex, *startCharPos;
     startCharPos = mSpec.get() + mDirectory.mPos;
     thisIndex = startCharPos;
     thatIndex = stdurl2->mSpec.get() + mDirectory.mPos;
     while ((*thisIndex == *thatIndex) && *thisIndex)
     {
         thisIndex++;
         thatIndex++;
     }
     // backup to just after previous slash so we grab an appropriate path
     // segment such as a directory (not partial segments)
     // todo:  also check for file matches which include '?' and '#'
     while ((thisIndex != startCharPos) && (*(thisIndex-1) != '/'))
         thisIndex--;
     // grab spec from beginning to thisIndex
     aResult = Substring(mSpec, mScheme.mPos, thisIndex - mSpec.get());
     NS_RELEASE(stdurl2);
     return rv;
 }
 NS_IMETHODIMP
 nsStandardURL::GetRelativeSpec(nsIURI *uri2, nsACString &aResult)
 {
     NS_ENSURE_ARG_POINTER(uri2);
     aResult.Truncate();
     // if uri's are equal, then return empty string
     bool isEquals = false;
     if (NS_SUCCEEDED(Equals(uri2, &isEquals)) && isEquals)
         return NS_OK;
     nsStandardURL *stdurl2;
     nsresult rv = uri2->QueryInterface(kThisImplCID, (void **) &stdurl2);
     isEquals = NS_SUCCEEDED(rv)
             && SegmentIs(mScheme, stdurl2->mSpec.get(), stdurl2->mScheme)
             && SegmentIs(mHost, stdurl2->mSpec.get(), stdurl2->mHost)
             && SegmentIs(mUsername, stdurl2->mSpec.get(), stdurl2->mUsername)
             && SegmentIs(mPassword, stdurl2->mSpec.get(), stdurl2->mPassword)
             && (Port() == stdurl2->Port());
     if (!isEquals)
     {
         if (NS_SUCCEEDED(rv))
             NS_RELEASE(stdurl2);
         return uri2->GetSpec(aResult);
     }
     // scan for first mismatched character
     const char *thisIndex, *thatIndex, *startCharPos;
     startCharPos = mSpec.get() + mDirectory.mPos;
     thisIndex = startCharPos;
     thatIndex = stdurl2->mSpec.get() + mDirectory.mPos;
 #ifdef XP_WIN
     bool isFileScheme = SegmentIs(mScheme, "file");
     if (isFileScheme)
     {
         // on windows, we need to match the first segment of the path
         // if these don't match then we need to return an absolute path
         // skip over any leading '/' in path
         while ((*thisIndex == *thatIndex) && (*thisIndex == '/'))
         {
             thisIndex++;
             thatIndex++;
         }
         // look for end of first segment
         while ((*thisIndex == *thatIndex) && *thisIndex && (*thisIndex != '/'))
         {
             thisIndex++;
             thatIndex++;
         }
         // if we didn't match through the first segment, return absolute path
         if ((*thisIndex != '/') || (*thatIndex != '/'))
         {
             NS_RELEASE(stdurl2);
             return uri2->GetSpec(aResult);
         }
     }
 #endif
     while ((*thisIndex == *thatIndex) && *thisIndex)
     {
         thisIndex++;
         thatIndex++;
     }
     // backup to just after previous slash so we grab an appropriate path
     // segment such as a directory (not partial segments)
     // todo:  also check for file matches with '#' and '?'
     while ((*(thatIndex-1) != '/') && (thatIndex != startCharPos))
         thatIndex--;
     const char *limit = mSpec.get() + mFilepath.mPos + mFilepath.mLen;
     // need to account for slashes and add corresponding "../"
     for (; thisIndex <= limit && *thisIndex; ++thisIndex)
     {
         if (*thisIndex == '/')
             aResult.AppendLiteral("../");
     }
     // grab spec from thisIndex to end
     uint32_t startPos = stdurl2->mScheme.mPos + thatIndex - stdurl2->mSpec.get();
     aResult.Append(Substring(stdurl2->mSpec, startPos,
                              stdurl2->mSpec.Length() - startPos));
     NS_RELEASE(stdurl2);
     return rv;
 }
 //----------------------------------------------------------------------------
 // nsStandardURL::nsIURL
 //----------------------------------------------------------------------------
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetFilePath(nsACString &result)
 {
     result = Filepath();
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetQuery(nsACString &result)
 {
     result = Query();
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetRef(nsACString &result)
 {
     result = Ref();
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetHasRef(bool *result)
 {
     *result = (mRef.mLen >= 0);
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetDirectory(nsACString &result)
 {
     result = Directory();
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetFileName(nsACString &result)
 {
     result = Filename();
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetFileBaseName(nsACString &result)
 {
     result = Basename();
     return NS_OK;
 }
 // result may contain unescaped UTF-8 characters
 NS_IMETHODIMP
 nsStandardURL::GetFileExtension(nsACString &result)
 {
     result = Extension();
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetFilePath(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &flat = PromiseFlatCString(input);
     const char *filepath = flat.get();
     LOG(("nsStandardURL::SetFilePath [filepath=%s]\n", filepath));
     // if there isn't a filepath, then there can't be anything
     // after the path either.  this url is likely uninitialized.
     if (mFilepath.mLen < 0)
         return SetPath(flat);
     if (filepath && *filepath) {
         nsAutoCString spec;
         uint32_t dirPos, basePos, extPos;
         int32_t dirLen, baseLen, extLen;
         nsresult rv;
         rv = mParser->ParseFilePath(filepath, -1,
                                     &dirPos, &dirLen,
                                     &basePos, &baseLen,
                                     &extPos, &extLen);
         if (NS_FAILED(rv)) return rv;
         // build up new candidate spec
         spec.Assign(mSpec.get(), mPath.mPos);
         // ensure leading '/'
         if (filepath[dirPos] != '/')
             spec.Append('/');
         GET_SEGMENT_ENCODER(encoder);
         // append encoded filepath components
         if (dirLen > 0)
             encoder.EncodeSegment(Substring(filepath + dirPos,
                                             filepath + dirPos + dirLen),
                                   esc_Directory | esc_AlwaysCopy, spec);
         if (baseLen > 0)
             encoder.EncodeSegment(Substring(filepath + basePos,
                                             filepath + basePos + baseLen),
                                   esc_FileBaseName | esc_AlwaysCopy, spec);
         if (extLen >= 0) {
             spec.Append('.');
             if (extLen > 0)
                 encoder.EncodeSegment(Substring(filepath + extPos,
                                                 filepath + extPos + extLen),
                                       esc_FileExtension | esc_AlwaysCopy,
                                       spec);
         }
         // compute the ending position of the current filepath
         if (mFilepath.mLen >= 0) {
             uint32_t end = mFilepath.mPos + mFilepath.mLen;
             if (mSpec.Length() > end)
                 spec.Append(mSpec.get() + end, mSpec.Length() - end);
         }
         return SetSpec(spec);
     }
     else if (mPath.mLen > 1) {
         mSpec.Cut(mPath.mPos + 1, mFilepath.mLen - 1);
         // left shift query, and ref
         ShiftFromQuery(1 - mFilepath.mLen);
         // these contain only a '/'
         mPath.mLen = 1;
         mDirectory.mLen = 1;
         mFilepath.mLen = 1;
         // these are no longer defined
         mBasename.mLen = -1;
         mExtension.mLen = -1;
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetQuery(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &flat = PromiseFlatCString(input);
     const char *query = flat.get();
     LOG(("nsStandardURL::SetQuery [query=%s]\n", query));
     if (mPath.mLen < 0)
         return SetPath(flat);
     InvalidateCache();
     if (!query || !*query) {
         // remove existing query
         if (mQuery.mLen >= 0) {
             // remove query and leading '?'
             mSpec.Cut(mQuery.mPos - 1, mQuery.mLen + 1);
             ShiftFromRef(-(mQuery.mLen + 1));
             mPath.mLen -= (mQuery.mLen + 1);
             mQuery.mPos = 0;
             mQuery.mLen = -1;
         }
         return NS_OK;
     }
     int32_t queryLen = strlen(query);
     if (query[0] == '?') {
         query++;
         queryLen--;
     }
     if (mQuery.mLen < 0) {
         if (mRef.mLen < 0)
             mQuery.mPos = mSpec.Length();
         else
             mQuery.mPos = mRef.mPos - 1;
         mSpec.Insert('?', mQuery.mPos);
         mQuery.mPos++;
         mQuery.mLen = 0;
         // the insertion pushes these out by 1
         mPath.mLen++;
         mRef.mPos++;
     }
     // encode query if necessary
     nsAutoCString buf;
     bool encoded;
     GET_QUERY_ENCODER(encoder);
     encoder.EncodeSegmentCount(query, URLSegment(0, queryLen), esc_Query,
                                buf, encoded);
     if (encoded) {
         query = buf.get();
         queryLen = buf.Length();
     }
     int32_t shift = ReplaceSegment(mQuery.mPos, mQuery.mLen, query, queryLen);
     if (shift) {
         mQuery.mLen = queryLen;
         mPath.mLen += shift;
         ShiftFromRef(shift);
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetRef(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &flat = PromiseFlatCString(input);
     const char *ref = flat.get();
     LOG(("nsStandardURL::SetRef [ref=%s]\n", ref));
     if (mPath.mLen < 0)
         return SetPath(flat);
     InvalidateCache();
     if (!ref || !*ref) {
         // remove existing ref
         if (mRef.mLen >= 0) {
             // remove ref and leading '#'
             mSpec.Cut(mRef.mPos - 1, mRef.mLen + 1);
             mPath.mLen -= (mRef.mLen + 1);
             mRef.mPos = 0;
             mRef.mLen = -1;
         }
         return NS_OK;
     }
     int32_t refLen = strlen(ref);
     if (ref[0] == '#') {
         ref++;
         refLen--;
     }
     if (mRef.mLen < 0) {
         mSpec.Append('#');
         ++mPath.mLen;  // Include the # in the path.
         mRef.mPos = mSpec.Length();
         mRef.mLen = 0;
     }
     // encode ref if necessary
     nsAutoCString buf;
     bool encoded;
     GET_SEGMENT_ENCODER(encoder);
     encoder.EncodeSegmentCount(ref, URLSegment(0, refLen), esc_Ref,
                                buf, encoded);
     if (encoded) {
         ref = buf.get();
         refLen = buf.Length();
     }
     int32_t shift = ReplaceSegment(mRef.mPos, mRef.mLen, ref, refLen);
     mPath.mLen += shift;
     mRef.mLen = refLen;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetDirectory(const nsACString &input)
 {
     NS_NOTYETIMPLEMENTED("");
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 NS_IMETHODIMP
 nsStandardURL::SetFileName(const nsACString &input)
 {
     ENSURE_MUTABLE();
     const nsPromiseFlatCString &flat = PromiseFlatCString(input);
     const char *filename = flat.get();
     LOG(("nsStandardURL::SetFileName [filename=%s]\n", filename));
     if (mPath.mLen < 0)
         return SetPath(flat);
     int32_t shift = 0;
     if (!(filename && *filename)) {
         // remove the filename
         if (mBasename.mLen > 0) {
             if (mExtension.mLen >= 0)
                 mBasename.mLen += (mExtension.mLen + 1);
             mSpec.Cut(mBasename.mPos, mBasename.mLen);
             shift = -mBasename.mLen;
             mBasename.mLen = 0;
             mExtension.mLen = -1;
         }
     }
     else {
         nsresult rv;
         URLSegment basename, extension;
         // let the parser locate the basename and extension
         rv = mParser->ParseFileName(filename, -1,
                                     &basename.mPos, &basename.mLen,
                                     &extension.mPos, &extension.mLen);
         if (NS_FAILED(rv)) return rv;
         if (basename.mLen < 0) {
             // remove existing filename
             if (mBasename.mLen >= 0) {
                 uint32_t len = mBasename.mLen;
                 if (mExtension.mLen >= 0)
                     len += (mExtension.mLen + 1);
                 mSpec.Cut(mBasename.mPos, len);
                 shift = -int32_t(len);
                 mBasename.mLen = 0;
                 mExtension.mLen = -1;
             }
         }
         else {
             nsAutoCString newFilename;
             bool ignoredOut;
             GET_SEGMENT_ENCODER(encoder);
             basename.mLen = encoder.EncodeSegmentCount(filename, basename,
                                                        esc_FileBaseName |
                                                        esc_AlwaysCopy,
                                                        newFilename,
                                                        ignoredOut);
             if (extension.mLen >= 0) {
                 newFilename.Append('.');
                 extension.mLen = encoder.EncodeSegmentCount(filename, extension,
                                                             esc_FileExtension |
                                                             esc_AlwaysCopy,
                                                             newFilename,
                                                             ignoredOut);
             }
             if (mBasename.mLen < 0) {
                 // insert new filename
                 mBasename.mPos = mDirectory.mPos + mDirectory.mLen;
                 mSpec.Insert(newFilename, mBasename.mPos);
                 shift = newFilename.Length();
             }
             else {
                 // replace existing filename
                 uint32_t oldLen = uint32_t(mBasename.mLen);
                 if (mExtension.mLen >= 0)
                     oldLen += (mExtension.mLen + 1);
                 mSpec.Replace(mBasename.mPos, oldLen, newFilename);
                 shift = newFilename.Length() - oldLen;
             }
             mBasename.mLen = basename.mLen;
             mExtension.mLen = extension.mLen;
             if (mExtension.mLen >= 0)
                 mExtension.mPos = mBasename.mPos + mBasename.mLen + 1;
         }
     }
     if (shift) {
         ShiftFromQuery(shift);
         mFilepath.mLen += shift;
         mPath.mLen += shift;
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetFileBaseName(const nsACString &input)
 {
     nsAutoCString extension;
     nsresult rv = GetFileExtension(extension);
     NS_ENSURE_SUCCESS(rv, rv);
     nsAutoCString newFileName(input);
     if (!extension.IsEmpty()) {
         newFileName.Append('.');
         newFileName.Append(extension);
     }
     return SetFileName(newFileName);
 }
 NS_IMETHODIMP
 nsStandardURL::SetFileExtension(const nsACString &input)
 {
     nsAutoCString newFileName;
     nsresult rv = GetFileBaseName(newFileName);
     NS_ENSURE_SUCCESS(rv, rv);
     if (!input.IsEmpty()) {
         newFileName.Append('.');
         newFileName.Append(input);
     }
     return SetFileName(newFileName);
 }
 //----------------------------------------------------------------------------
 // nsStandardURL::nsIFileURL
 //----------------------------------------------------------------------------
 nsresult
 nsStandardURL::EnsureFile()
 {
     NS_PRECONDITION(mSupportsFileURL,
                     "EnsureFile() called on a URL that doesn't support files!");
     if (mFile) {
         // Nothing to do
         return NS_OK;
     }
     // Parse the spec if we don't have a cached result
     if (mSpec.IsEmpty()) {
         NS_WARNING("url not initialized");
         return NS_ERROR_NOT_INITIALIZED;
     }
     if (!SegmentIs(mScheme, "file")) {
         NS_WARNING("not a file URL");
         return NS_ERROR_FAILURE;
     }
     return net_GetFileFromURLSpec(mSpec, getter_AddRefs(mFile));
 }
 NS_IMETHODIMP
 nsStandardURL::GetFile(nsIFile **result)
 {
     NS_PRECONDITION(mSupportsFileURL,
                     "GetFile() called on a URL that doesn't support files!");
     nsresult rv = EnsureFile();
     if (NS_FAILED(rv))
         return rv;
 #if defined(PR_LOGGING)
     if (LOG_ENABLED()) {
         nsAutoCString path;
         mFile->GetNativePath(path);
         LOG(("nsStandardURL::GetFile [this=%p spec=%s resulting_path=%s]\n",
             this, mSpec.get(), path.get()));
     }
 #endif
     // clone the file, so the caller can modify it.
     // XXX nsIFileURL.idl specifies that the consumer must _not_ modify the
     // nsIFile returned from this method; but it seems that some folks do
     // (see bug 161921). until we can be sure that all the consumers are
     // behaving themselves, we'll stay on the safe side and clone the file.
     // see bug 212724 about fixing the consumers.
     return mFile->Clone(result);
 }
 NS_IMETHODIMP
 nsStandardURL::SetFile(nsIFile *file)
 {
     ENSURE_MUTABLE();
     NS_ENSURE_ARG_POINTER(file);
     nsresult rv;
     nsAutoCString url;
     rv = net_GetURLSpecFromFile(file, url);
     if (NS_FAILED(rv)) return rv;
     SetSpec(url);
     rv = Init(mURLType, mDefaultPort, url, nullptr, nullptr);
     // must clone |file| since its value is not guaranteed to remain constant
     if (NS_SUCCEEDED(rv)) {
         InvalidateCache();
         if (NS_FAILED(file->Clone(getter_AddRefs(mFile)))) {
             NS_WARNING("nsIFile::Clone failed");
             // failure to clone is not fatal (GetFile will generate mFile)
             mFile = 0;
         }
     }
     return rv;
 }
 //----------------------------------------------------------------------------
 // nsStandardURL::nsIStandardURL
 //----------------------------------------------------------------------------
 inline bool
 IsUTFCharset(const char *aCharset)
 {
     return ((aCharset[0] == 'U' || aCharset[0] == 'u') &&
             (aCharset[1] == 'T' || aCharset[1] == 't') &&
             (aCharset[2] == 'F' || aCharset[2] == 'f'));
 }
 NS_IMETHODIMP
 nsStandardURL::Init(uint32_t urlType,
                     int32_t defaultPort,
                     const nsACString &spec,
                     const char *charset,
                     nsIURI *baseURI)
 {
     ENSURE_MUTABLE();
     InvalidateCache();
     switch (urlType) {
     case URLTYPE_STANDARD:
         mParser = net_GetStdURLParser();
         break;
     case URLTYPE_AUTHORITY:
         mParser = net_GetAuthURLParser();
         break;
     case URLTYPE_NO_AUTHORITY:
         mParser = net_GetNoAuthURLParser();
         break;
     default:
         NS_NOTREACHED("bad urlType");
         return NS_ERROR_INVALID_ARG;
     }
     mDefaultPort = defaultPort;
     mURLType = urlType;
     mOriginCharset.Truncate();
     if (charset == nullptr || *charset == '\0') {
         // check if baseURI provides an origin charset and use that.
         if (baseURI)
             baseURI->GetOriginCharset(mOriginCharset);
         // URI can't be encoded in UTF-16, UTF-16BE, UTF-16LE, UTF-32,
         // UTF-32-LE, UTF-32LE, UTF-32BE (yet?). Truncate mOriginCharset if
         // it starts with "utf" (since an empty mOriginCharset implies
         // UTF-8, this is safe even if mOriginCharset is UTF-8).
         if (mOriginCharset.Length() > 3 &&
             IsUTFCharset(mOriginCharset.get())) {
             mOriginCharset.Truncate();
         }
     }
     else if (!IsUTFCharset(charset)) {
         mOriginCharset = charset;
     }
     if (baseURI) {
         uint32_t start, end;
         // pull out the scheme and where it ends
         nsresult rv = net_ExtractURLScheme(spec, &start, &end, nullptr);
         if (NS_SUCCEEDED(rv) && spec.Length() > end+2) {
             nsACString::const_iterator slash;
             spec.BeginReading(slash);
             slash.advance(end+1);
             // then check if // follows
             // if it follows, aSpec is really absolute ...
             // ignore aBaseURI in this case
             if (*slash == '/' && *(++slash) == '/')
                 baseURI = nullptr;
         }
     }
     if (!baseURI)
         return SetSpec(spec);
     nsAutoCString buf;
     nsresult rv = baseURI->Resolve(spec, buf);
     if (NS_FAILED(rv)) return rv;
     return SetSpec(buf);
 }
 NS_IMETHODIMP
 nsStandardURL::GetMutable(bool *value)
 {
     *value = mMutable;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::SetMutable(bool value)
 {
     NS_ENSURE_ARG(mMutable || !value);
     mMutable = value;
     return NS_OK;
 }
 //----------------------------------------------------------------------------
 // nsStandardURL::nsISerializable
 //----------------------------------------------------------------------------
 NS_IMETHODIMP
 nsStandardURL::Read(nsIObjectInputStream *stream)
 {
     NS_PRECONDITION(!mHostA, "Shouldn't have cached ASCII host");
     NS_PRECONDITION(mSpecEncoding == eEncoding_Unknown,
                     "Shouldn't have spec encoding here");
     nsresult rv;
     uint32_t urlType;
     rv = stream->Read32(&urlType);
     if (NS_FAILED(rv)) return rv;
     mURLType = urlType;
     switch (mURLType) {
       case URLTYPE_STANDARD:
         mParser = net_GetStdURLParser();
         break;
       case URLTYPE_AUTHORITY:
         mParser = net_GetAuthURLParser();
         break;
       case URLTYPE_NO_AUTHORITY:
         mParser = net_GetNoAuthURLParser();
         break;
       default:
         NS_NOTREACHED("bad urlType");
         return NS_ERROR_FAILURE;
     }
     rv = stream->Read32((uint32_t *) &mPort);
     if (NS_FAILED(rv)) return rv;
     rv = stream->Read32((uint32_t *) &mDefaultPort);
     if (NS_FAILED(rv)) return rv;
     rv = NS_ReadOptionalCString(stream, mSpec);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mScheme);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mAuthority);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mUsername);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mPassword);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mHost);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mPath);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mFilepath);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mDirectory);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mBasename);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mExtension);
     if (NS_FAILED(rv)) return rv;
     // handle forward compatibility from older serializations that included mParam
     URLSegment old_param;
     rv = ReadSegment(stream, old_param);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mQuery);
     if (NS_FAILED(rv)) return rv;
     rv = ReadSegment(stream, mRef);
     if (NS_FAILED(rv)) return rv;
     rv = NS_ReadOptionalCString(stream, mOriginCharset);
     if (NS_FAILED(rv)) return rv;
     bool isMutable;
     rv = stream->ReadBoolean(&isMutable);
     if (NS_FAILED(rv)) return rv;
     mMutable = isMutable;
     bool supportsFileURL;
     rv = stream->ReadBoolean(&supportsFileURL);
     if (NS_FAILED(rv)) return rv;
     mSupportsFileURL = supportsFileURL;
     uint32_t hostEncoding;
     rv = stream->Read32(&hostEncoding);
     if (NS_FAILED(rv)) return rv;
     if (hostEncoding != eEncoding_ASCII && hostEncoding != eEncoding_UTF8) {
         NS_WARNING("Unexpected host encoding");
         return NS_ERROR_UNEXPECTED;
     }
     mHostEncoding = hostEncoding;
     // wait until object is set up, then modify path to include the param
     if (old_param.mLen >= 0) {  // note that mLen=0 is ";"
         // If this wasn't empty, it marks characters between the end of the
         // file and start of the query - mPath should include the param,
         // query and ref already.  Bump the mFilePath and
         // directory/basename/extension components to include this.
         mFilepath.Merge(mSpec,  ';', old_param);
         mDirectory.Merge(mSpec, ';', old_param);
         mBasename.Merge(mSpec,  ';', old_param);
         mExtension.Merge(mSpec, ';', old_param);
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::Write(nsIObjectOutputStream *stream)
 {
     nsresult rv;
     rv = stream->Write32(mURLType);
     if (NS_FAILED(rv)) return rv;
     rv = stream->Write32(uint32_t(mPort));
     if (NS_FAILED(rv)) return rv;
     rv = stream->Write32(uint32_t(mDefaultPort));
     if (NS_FAILED(rv)) return rv;
     rv = NS_WriteOptionalStringZ(stream, mSpec.get());
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mScheme);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mAuthority);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mUsername);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mPassword);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mHost);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mPath);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mFilepath);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mDirectory);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mBasename);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mExtension);
     if (NS_FAILED(rv)) return rv;
     // for backwards compatibility since we removed mParam.  Note that this will mean that
     // an older browser will read "" for mParam, and the param(s) will be part of mPath (as they
     // after the removal of special handling).  It only matters if you downgrade a browser to before
     // the patch.
     URLSegment empty;
     rv = WriteSegment(stream, empty);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mQuery);
     if (NS_FAILED(rv)) return rv;
     rv = WriteSegment(stream, mRef);
     if (NS_FAILED(rv)) return rv;
     rv = NS_WriteOptionalStringZ(stream, mOriginCharset.get());
     if (NS_FAILED(rv)) return rv;
     rv = stream->WriteBoolean(mMutable);
     if (NS_FAILED(rv)) return rv;
     rv = stream->WriteBoolean(mSupportsFileURL);
     if (NS_FAILED(rv)) return rv;
     rv = stream->Write32(mHostEncoding);
     if (NS_FAILED(rv)) return rv;
     // mSpecEncoding and mHostA are just caches that can be recovered as needed.
     return NS_OK;
 }
 //---------------------------------------------------------------------------
 // nsStandardURL::nsIIPCSerializableURI
 //---------------------------------------------------------------------------
 inline
 mozilla::ipc::StandardURLSegment
 ToIPCSegment(const nsStandardURL::URLSegment& aSegment)
 {
     return mozilla::ipc::StandardURLSegment(aSegment.mPos, aSegment.mLen);
 }
 inline
 nsStandardURL::URLSegment
 FromIPCSegment(const mozilla::ipc::StandardURLSegment& aSegment)
 {
     return nsStandardURL::URLSegment(aSegment.position(), aSegment.length());
 }
 void
 nsStandardURL::Serialize(URIParams& aParams)
 {
     StandardURLParams params;
     params.urlType() = mURLType;
     params.port() = mPort;
     params.defaultPort() = mDefaultPort;
     params.spec() = mSpec;
     params.scheme() = ToIPCSegment(mScheme);
     params.authority() = ToIPCSegment(mAuthority);
     params.username() = ToIPCSegment(mUsername);
     params.password() = ToIPCSegment(mPassword);
     params.host() = ToIPCSegment(mHost);
     params.path() = ToIPCSegment(mPath);
     params.filePath() = ToIPCSegment(mFilepath);
     params.directory() = ToIPCSegment(mDirectory);
     params.baseName() = ToIPCSegment(mBasename);
     params.extension() = ToIPCSegment(mExtension);
     params.query() = ToIPCSegment(mQuery);
     params.ref() = ToIPCSegment(mRef);
     params.originCharset() = mOriginCharset;
     params.isMutable() = !!mMutable;
     params.supportsFileURL() = !!mSupportsFileURL;
     params.hostEncoding() = mHostEncoding;
     // mSpecEncoding and mHostA are just caches that can be recovered as needed.
     aParams = params;
 }
 bool
 nsStandardURL::Deserialize(const URIParams& aParams)
 {
     NS_PRECONDITION(!mHostA, "Shouldn't have cached ASCII host");
     NS_PRECONDITION(mSpecEncoding == eEncoding_Unknown,
                     "Shouldn't have spec encoding here");
     NS_PRECONDITION(!mFile, "Shouldn't have cached file");
     if (aParams.type() != URIParams::TStandardURLParams) {
         NS_ERROR("Received unknown parameters from the other process!");
         return false;
     }
     const StandardURLParams& params = aParams.get_StandardURLParams();
     mURLType = params.urlType();
     switch (mURLType) {
         case URLTYPE_STANDARD:
             mParser = net_GetStdURLParser();
             break;
         case URLTYPE_AUTHORITY:
             mParser = net_GetAuthURLParser();
             break;
         case URLTYPE_NO_AUTHORITY:
             mParser = net_GetNoAuthURLParser();
             break;
         default:
             NS_NOTREACHED("bad urlType");
             return false;
     }
     if (params.hostEncoding() != eEncoding_ASCII &&
         params.hostEncoding() != eEncoding_UTF8) {
         NS_WARNING("Unexpected host encoding");
         return false;
     }
     mPort = params.port();
     mDefaultPort = params.defaultPort();
     mSpec = params.spec();
     mScheme = FromIPCSegment(params.scheme());
     mAuthority = FromIPCSegment(params.authority());
     mUsername = FromIPCSegment(params.username());
     mPassword = FromIPCSegment(params.password());
     mHost = FromIPCSegment(params.host());
     mPath = FromIPCSegment(params.path());
     mFilepath = FromIPCSegment(params.filePath());
     mDirectory = FromIPCSegment(params.directory());
     mBasename = FromIPCSegment(params.baseName());
     mExtension = FromIPCSegment(params.extension());
     mQuery = FromIPCSegment(params.query());
     mRef = FromIPCSegment(params.ref());
     mOriginCharset = params.originCharset();
     mMutable = params.isMutable();
     mSupportsFileURL = params.supportsFileURL();
     mHostEncoding = params.hostEncoding();
     // mSpecEncoding and mHostA are just caches that can be recovered as needed.
     return true;
 }
 //----------------------------------------------------------------------------
 // nsStandardURL::nsIClassInfo
 //----------------------------------------------------------------------------
 NS_IMETHODIMP
 nsStandardURL::GetInterfaces(uint32_t *count, nsIID * **array)
 {
     *count = 0;
     *array = nullptr;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetHelperForLanguage(uint32_t language, nsISupports **_retval)
 {
     *_retval = nullptr;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetClassDescription(char * *aClassDescription)
 {
     *aClassDescription = nullptr;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetClassID(nsCID * *aClassID)
 {
     *aClassID = (nsCID*) nsMemory::Alloc(sizeof(nsCID));
     if (!*aClassID)
         return NS_ERROR_OUT_OF_MEMORY;
     return GetClassIDNoAlloc(*aClassID);
 }
 NS_IMETHODIMP
 nsStandardURL::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetFlags(uint32_t *aFlags)
 {
     *aFlags = nsIClassInfo::MAIN_THREAD_ONLY;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsStandardURL::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     *aClassIDNoAlloc = kStandardURLCID;
     return NS_OK;
 }
 //----------------------------------------------------------------------------
 // nsStandardURL::nsISizeOf
 //----------------------------------------------------------------------------
 size_t
 nsStandardURL::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
 {
   return mSpec.SizeOfExcludingThisIfUnshared(aMallocSizeOf) +
          mOriginCharset.SizeOfExcludingThisIfUnshared(aMallocSizeOf) +
          aMallocSizeOf(mHostA);
   // Measurement of the following members may be added later if DMD finds it is
   // worthwhile:
   // - mParser
   // - mFile
 }
 size_t
 nsStandardURL::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
   return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
 }

The Tor Browser / annotate

netwerk/base/src/nsStandardURL.cpp@6474c204b198 (annotated)

netwerk/base/src/nsStandardURL.cpp