The Tor Browser: xpcom/glue/nsINIParser.cpp@129ffea94266 (annotated)

xpcom/glue/nsINIParser.cpp@129ffea94266 (annotated)

xpcom/glue/nsINIParser.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* 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/. */
 // Moz headers (alphabetical)
 #include "nsCRTGlue.h"
 #include "nsError.h"
 #include "nsIFile.h"
 #include "nsINIParser.h"
 #include "mozilla/FileUtils.h" // AutoFILE
 // System headers (alphabetical)
 #include <stdio.h>
 #include <stdlib.h>
 #ifdef XP_WIN
 #include <windows.h>
 #endif
 #if defined(XP_WIN)
 #define READ_BINARYMODE L"rb"
 #else
 #define READ_BINARYMODE "r"
 #endif
 #ifdef XP_WIN
 inline FILE *TS_tfopen (const char *path, const wchar_t *mode)
 {
     wchar_t wPath[MAX_PATH];
     MultiByteToWideChar(CP_UTF8, 0, path, -1, wPath, MAX_PATH);
     return _wfopen(wPath, mode);
 }
 #else
 inline FILE *TS_tfopen (const char *path, const char *mode)
 {
     return fopen(path, mode);
 }
 #endif
 // Stack based FILE wrapper to ensure that fclose is called, copied from
 // toolkit/mozapps/update/updater/readstrings.cpp
 class AutoFILE {
 public:
   AutoFILE(FILE *fp = nullptr) : fp_(fp) {}
   ~AutoFILE() { if (fp_) fclose(fp_); }
   operator FILE *() { return fp_; }
   FILE** operator &() { return &fp_; }
   void operator=(FILE *fp) { fp_ = fp; }
 private:
   FILE *fp_;
 };
 nsresult
 nsINIParser::Init(nsIFile* aFile)
 {
     /* open the file. Don't use OpenANSIFileDesc, because you mustn't
        pass FILE* across shared library boundaries, which may be using
        different CRTs */
     AutoFILE fd;
 #ifdef XP_WIN
     nsAutoString path;
     nsresult rv = aFile->GetPath(path);
     if (NS_WARN_IF(NS_FAILED(rv)))
       return rv;
     fd = _wfopen(path.get(), READ_BINARYMODE);
 #else
     nsAutoCString path;
     aFile->GetNativePath(path);
     fd = fopen(path.get(), READ_BINARYMODE);
 #endif
     if (!fd)
       return NS_ERROR_FAILURE;
     return InitFromFILE(fd);
 }
 nsresult
 nsINIParser::Init(const char *aPath)
 {
     /* open the file */
     AutoFILE fd = TS_tfopen(aPath, READ_BINARYMODE);
     if (!fd)
         return NS_ERROR_FAILURE;
     return InitFromFILE(fd);
 }
 static const char kNL[] = "\r\n";
 static const char kEquals[] = "=";
 static const char kWhitespace[] = " \t";
 static const char kRBracket[] = "]";
 nsresult
 nsINIParser::InitFromFILE(FILE *fd)
 {
     /* get file size */
     if (fseek(fd, 0, SEEK_END) != 0)
         return NS_ERROR_FAILURE;
     long flen = ftell(fd);
     if (flen == 0)
         return NS_ERROR_FAILURE;
     /* malloc an internal buf the size of the file */
     mFileContents = new char[flen + 2];
     if (!mFileContents)
         return NS_ERROR_OUT_OF_MEMORY;
     /* read the file in one swoop */
     if (fseek(fd, 0, SEEK_SET) != 0)
         return NS_BASE_STREAM_OSERROR;
     int rd = fread(mFileContents, sizeof(char), flen, fd);
     if (rd != flen)
         return NS_BASE_STREAM_OSERROR;
     // We write a UTF16 null so that the file is easier to convert to UTF8
     mFileContents[flen] = mFileContents[flen + 1] = '\0';
     char *buffer = &mFileContents[0];
     if (flen >= 3
     && mFileContents[0] == static_cast<char>(0xEF)
     && mFileContents[1] == static_cast<char>(0xBB)
     && mFileContents[2] == static_cast<char>(0xBF)) {
       // Someone set us up the Utf-8 BOM
       // This case is easy, since we assume that BOM-less
       // files are Utf-8 anyway.  Just skip the BOM and process as usual.
       buffer = &mFileContents[3];
     }
 #ifdef XP_WIN
     if (flen >= 2
      && mFileContents[0] == static_cast<char>(0xFF)
      && mFileContents[1] == static_cast<char>(0xFE)) {
         // Someone set us up the Utf-16LE BOM
         buffer = &mFileContents[2];
         // Get the size required for our Utf8 buffer
         flen = WideCharToMultiByte(CP_UTF8,
 ,
                                    reinterpret_cast<LPWSTR>(buffer),
                                    -1,
                                    nullptr,
 ,
                                    nullptr,
                                    nullptr);
         if (0 == flen) {
             return NS_ERROR_FAILURE;
         }
         nsAutoArrayPtr<char> utf8Buffer(new char[flen]);
         if (0 == WideCharToMultiByte(CP_UTF8,
 ,
                                      reinterpret_cast<LPWSTR>(buffer),
                                      -1,
                                      utf8Buffer,
                                      flen,
                                      nullptr,
                                      nullptr)) {
             return NS_ERROR_FAILURE;
         }
         mFileContents = utf8Buffer.forget();
         buffer = mFileContents;
     }
 #endif
     char *currSection = nullptr;
     // outer loop tokenizes into lines
     while (char *token = NS_strtok(kNL, &buffer)) {
         if (token[0] == '#' || token[0] == ';') // it's a comment
             continue;
         token = (char*) NS_strspnp(kWhitespace, token);
         if (!*token) // empty line
             continue;
         if (token[0] == '[') { // section header!
             ++token;
             currSection = token;
             char *rb = NS_strtok(kRBracket, &token);
             if (!rb || NS_strtok(kWhitespace, &token)) {
                 // there's either an unclosed [Section or a [Section]Moretext!
                 // we could frankly decide that this INI file is malformed right
                 // here and stop, but we won't... keep going, looking for
                 // a well-formed [section] to continue working with
                 currSection = nullptr;
             }
             continue;
         }
         if (!currSection) {
             // If we haven't found a section header (or we found a malformed
             // section header), don't bother parsing this line.
             continue;
         }
         char *key = token;
         char *e = NS_strtok(kEquals, &token);
         if (!e || !token)
             continue;
         INIValue *v;
         if (!mSections.Get(currSection, &v)) {
             v = new INIValue(key, token);
             if (!v)
                 return NS_ERROR_OUT_OF_MEMORY;
             mSections.Put(currSection, v);
             continue;
         }
         // Check whether this key has already been specified; overwrite
         // if so, or append if not.
         while (v) {
             if (!strcmp(key, v->key)) {
                 v->value = token;
                 break;
             }
             if (!v->next) {
                 v->next = new INIValue(key, token);
                 if (!v->next)
                     return NS_ERROR_OUT_OF_MEMORY;
                 break;
             }
             v = v->next;
         }
         NS_ASSERTION(v, "v should never be null coming out of this loop");
     }
     return NS_OK;
 }
 nsresult
 nsINIParser::GetString(const char *aSection, const char *aKey,
                        nsACString &aResult)
 {
     INIValue *val;
     mSections.Get(aSection, &val);
     while (val) {
         if (strcmp(val->key, aKey) == 0) {
             aResult.Assign(val->value);
             return NS_OK;
         }
         val = val->next;
     }
     return NS_ERROR_FAILURE;
 }
 nsresult
 nsINIParser::GetString(const char *aSection, const char *aKey,
                        char *aResult, uint32_t aResultLen)
 {
     INIValue *val;
     mSections.Get(aSection, &val);
     while (val) {
         if (strcmp(val->key, aKey) == 0) {
             strncpy(aResult, val->value, aResultLen);
             aResult[aResultLen - 1] = '\0';
             if (strlen(val->value) >= aResultLen)
                 return NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
             return NS_OK;
         }
         val = val->next;
     }
     return NS_ERROR_FAILURE;
 }
 PLDHashOperator
 nsINIParser::GetSectionsCB(const char *aKey, INIValue *aData,
                            void *aClosure)
 {
     GSClosureStruct *cs = reinterpret_cast<GSClosureStruct*>(aClosure);
     return cs->usercb(aKey, cs->userclosure) ? PL_DHASH_NEXT : PL_DHASH_STOP;
 }
 nsresult
 nsINIParser::GetSections(INISectionCallback aCB, void *aClosure)
 {
     GSClosureStruct gs = {
         aCB,
         aClosure
     };
     mSections.EnumerateRead(GetSectionsCB, &gs);
     return NS_OK;
 }
 nsresult
 nsINIParser::GetStrings(const char *aSection,
                         INIStringCallback aCB, void *aClosure)
 {
     INIValue *val;
     for (mSections.Get(aSection, &val);
          val;
          val = val->next) {
         if (!aCB(val->key, val->value, aClosure))
             return NS_OK;
     }
     return NS_OK;
 }

The Tor Browser / annotate

xpcom/glue/nsINIParser.cpp@129ffea94266 (annotated)

xpcom/glue/nsINIParser.cpp