The Tor Browser / file comparison
comparison: startupcache/StartupCacheUtils.cpp
startupcache/StartupCacheUtils.cpp
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
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| -1:000000000000 | 0:14eb03ad3dfd |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "nsCOMPtr.h" | |
| 6 #include "nsIInputStream.h" | |
| 7 #include "nsIStringStream.h" | |
| 8 #include "nsNetUtil.h" | |
| 9 #include "nsIJARURI.h" | |
| 10 #include "nsIResProtocolHandler.h" | |
| 11 #include "nsIChromeRegistry.h" | |
| 12 #include "nsAutoPtr.h" | |
| 13 #include "StartupCacheUtils.h" | |
| 14 #include "mozilla/scache/StartupCache.h" | |
| 15 #include "mozilla/Omnijar.h" | |
| 16 | |
| 17 namespace mozilla { | |
| 18 namespace scache { | |
| 19 | |
| 20 NS_EXPORT nsresult | |
| 21 NewObjectInputStreamFromBuffer(char* buffer, uint32_t len, | |
| 22 nsIObjectInputStream** stream) | |
| 23 { | |
| 24 nsCOMPtr<nsIStringInputStream> stringStream | |
| 25 = do_CreateInstance("@mozilla.org/io/string-input-stream;1"); | |
| 26 nsCOMPtr<nsIObjectInputStream> objectInput | |
| 27 = do_CreateInstance("@mozilla.org/binaryinputstream;1"); | |
| 28 | |
| 29 stringStream->AdoptData(buffer, len); | |
| 30 objectInput->SetInputStream(stringStream); | |
| 31 | |
| 32 objectInput.forget(stream); | |
| 33 return NS_OK; | |
| 34 } | |
| 35 | |
| 36 NS_EXPORT nsresult | |
| 37 NewObjectOutputWrappedStorageStream(nsIObjectOutputStream **wrapperStream, | |
| 38 nsIStorageStream** stream, | |
| 39 bool wantDebugStream) | |
| 40 { | |
| 41 nsCOMPtr<nsIStorageStream> storageStream; | |
| 42 | |
| 43 nsresult rv = NS_NewStorageStream(256, UINT32_MAX, getter_AddRefs(storageStream)); | |
| 44 NS_ENSURE_SUCCESS(rv, rv); | |
| 45 | |
| 46 nsCOMPtr<nsIObjectOutputStream> objectOutput | |
| 47 = do_CreateInstance("@mozilla.org/binaryoutputstream;1"); | |
| 48 nsCOMPtr<nsIOutputStream> outputStream | |
| 49 = do_QueryInterface(storageStream); | |
| 50 | |
| 51 objectOutput->SetOutputStream(outputStream); | |
| 52 | |
| 53 #ifdef DEBUG | |
| 54 if (wantDebugStream) { | |
| 55 // Wrap in debug stream to detect unsupported writes of | |
| 56 // multiply-referenced non-singleton objects | |
| 57 StartupCache* sc = StartupCache::GetSingleton(); | |
| 58 NS_ENSURE_TRUE(sc, NS_ERROR_UNEXPECTED); | |
| 59 nsCOMPtr<nsIObjectOutputStream> debugStream; | |
| 60 sc->GetDebugObjectOutputStream(objectOutput, getter_AddRefs(debugStream)); | |
| 61 debugStream.forget(wrapperStream); | |
| 62 } else { | |
| 63 objectOutput.forget(wrapperStream); | |
| 64 } | |
| 65 #else | |
| 66 objectOutput.forget(wrapperStream); | |
| 67 #endif | |
| 68 | |
| 69 storageStream.forget(stream); | |
| 70 return NS_OK; | |
| 71 } | |
| 72 | |
| 73 NS_EXPORT nsresult | |
| 74 NewBufferFromStorageStream(nsIStorageStream *storageStream, | |
| 75 char** buffer, uint32_t* len) | |
| 76 { | |
| 77 nsresult rv; | |
| 78 nsCOMPtr<nsIInputStream> inputStream; | |
| 79 rv = storageStream->NewInputStream(0, getter_AddRefs(inputStream)); | |
| 80 NS_ENSURE_SUCCESS(rv, rv); | |
| 81 | |
| 82 uint64_t avail64; | |
| 83 rv = inputStream->Available(&avail64); | |
| 84 NS_ENSURE_SUCCESS(rv, rv); | |
| 85 NS_ENSURE_TRUE(avail64 <= UINT32_MAX, NS_ERROR_FILE_TOO_BIG); | |
| 86 | |
| 87 uint32_t avail = (uint32_t)avail64; | |
| 88 nsAutoArrayPtr<char> temp (new char[avail]); | |
| 89 uint32_t read; | |
| 90 rv = inputStream->Read(temp, avail, &read); | |
| 91 if (NS_SUCCEEDED(rv) && avail != read) | |
| 92 rv = NS_ERROR_UNEXPECTED; | |
| 93 | |
| 94 if (NS_FAILED(rv)) { | |
| 95 return rv; | |
| 96 } | |
| 97 | |
| 98 *len = avail; | |
| 99 *buffer = temp.forget(); | |
| 100 return NS_OK; | |
| 101 } | |
| 102 | |
| 103 static const char baseName[2][5] = { "gre/", "app/" }; | |
| 104 | |
| 105 static inline bool | |
| 106 canonicalizeBase(nsAutoCString &spec, | |
| 107 nsACString &out) | |
| 108 { | |
| 109 nsAutoCString greBase, appBase; | |
| 110 nsresult rv = mozilla::Omnijar::GetURIString(mozilla::Omnijar::GRE, greBase); | |
| 111 if (NS_FAILED(rv) || !greBase.Length()) | |
| 112 return false; | |
| 113 | |
| 114 rv = mozilla::Omnijar::GetURIString(mozilla::Omnijar::APP, appBase); | |
| 115 if (NS_FAILED(rv)) | |
| 116 return false; | |
| 117 | |
| 118 bool underGre = !greBase.Compare(spec.get(), false, greBase.Length()); | |
| 119 bool underApp = appBase.Length() && | |
| 120 !appBase.Compare(spec.get(), false, appBase.Length()); | |
| 121 | |
| 122 if (!underGre && !underApp) | |
| 123 return false; | |
| 124 | |
| 125 /** | |
| 126 * At this point, if both underGre and underApp are true, it can be one | |
| 127 * of the two following cases: | |
| 128 * - the GRE directory points to a subdirectory of the APP directory, | |
| 129 * meaning spec points under GRE. | |
| 130 * - the APP directory points to a subdirectory of the GRE directory, | |
| 131 * meaning spec points under APP. | |
| 132 * Checking the GRE and APP path length is enough to know in which case | |
| 133 * we are. | |
| 134 */ | |
| 135 if (underGre && underApp && greBase.Length() < appBase.Length()) | |
| 136 underGre = false; | |
| 137 | |
| 138 out.Append("/resource/"); | |
| 139 out.Append(baseName[underGre ? mozilla::Omnijar::GRE : mozilla::Omnijar::APP]); | |
| 140 out.Append(Substring(spec, underGre ? greBase.Length() : appBase.Length())); | |
| 141 return true; | |
| 142 } | |
| 143 | |
| 144 /** | |
| 145 * PathifyURI transforms uris into useful zip paths | |
| 146 * to make it easier to manipulate startup cache entries | |
| 147 * using standard zip tools. | |
| 148 * Transformations applied: | |
| 149 * * resource:// URIs are resolved to their corresponding file/jar URI to | |
| 150 * canonicalize resources URIs other than gre and app. | |
| 151 * * Paths under GRE or APP directory have their base path replaced with | |
| 152 * resource/gre or resource/app to avoid depending on install location. | |
| 153 * * jar:file:///path/to/file.jar!/sub/path urls are replaced with | |
| 154 * /path/to/file.jar/sub/path | |
| 155 * | |
| 156 * The result is appended to the string passed in. Adding a prefix before | |
| 157 * calling is recommended to avoid colliding with other cache users. | |
| 158 * | |
| 159 * For example, in the js loader (string is prefixed with jsloader by caller): | |
| 160 * resource://gre/modules/XPCOMUtils.jsm or | |
| 161 * file://$GRE_DIR/modules/XPCOMUtils.jsm or | |
| 162 * jar:file://$GRE_DIR/omni.jar!/modules/XPCOMUtils.jsm becomes | |
| 163 * jsloader/resource/gre/modules/XPCOMUtils.jsm | |
| 164 * file://$PROFILE_DIR/extensions/{uuid}/components/component.js becomes | |
| 165 * jsloader/$PROFILE_DIR/extensions/%7Buuid%7D/components/component.js | |
| 166 * jar:file://$PROFILE_DIR/extensions/some.xpi!/components/component.js becomes | |
| 167 * jsloader/$PROFILE_DIR/extensions/some.xpi/components/component.js | |
| 168 */ | |
| 169 NS_EXPORT nsresult | |
| 170 PathifyURI(nsIURI *in, nsACString &out) | |
| 171 { | |
| 172 bool equals; | |
| 173 nsresult rv; | |
| 174 nsCOMPtr<nsIURI> uri = in; | |
| 175 nsAutoCString spec; | |
| 176 | |
| 177 // Resolve resource:// URIs. At the end of this if/else block, we | |
| 178 // have both spec and uri variables identifying the same URI. | |
| 179 if (NS_SUCCEEDED(in->SchemeIs("resource", &equals)) && equals) { | |
| 180 nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv); | |
| 181 NS_ENSURE_SUCCESS(rv, rv); | |
| 182 | |
| 183 nsCOMPtr<nsIProtocolHandler> ph; | |
| 184 rv = ioService->GetProtocolHandler("resource", getter_AddRefs(ph)); | |
| 185 NS_ENSURE_SUCCESS(rv, rv); | |
| 186 | |
| 187 nsCOMPtr<nsIResProtocolHandler> irph(do_QueryInterface(ph, &rv)); | |
| 188 NS_ENSURE_SUCCESS(rv, rv); | |
| 189 | |
| 190 rv = irph->ResolveURI(in, spec); | |
| 191 NS_ENSURE_SUCCESS(rv, rv); | |
| 192 | |
| 193 rv = ioService->NewURI(spec, nullptr, nullptr, getter_AddRefs(uri)); | |
| 194 NS_ENSURE_SUCCESS(rv, rv); | |
| 195 } else { | |
| 196 if (NS_SUCCEEDED(in->SchemeIs("chrome", &equals)) && equals) { | |
| 197 nsCOMPtr<nsIChromeRegistry> chromeReg = | |
| 198 mozilla::services::GetChromeRegistryService(); | |
| 199 if (!chromeReg) | |
| 200 return NS_ERROR_UNEXPECTED; | |
| 201 | |
| 202 rv = chromeReg->ConvertChromeURL(in, getter_AddRefs(uri)); | |
| 203 NS_ENSURE_SUCCESS(rv, rv); | |
| 204 } | |
| 205 | |
| 206 rv = uri->GetSpec(spec); | |
| 207 NS_ENSURE_SUCCESS(rv, rv); | |
| 208 } | |
| 209 | |
| 210 if (!canonicalizeBase(spec, out)) { | |
| 211 if (NS_SUCCEEDED(uri->SchemeIs("file", &equals)) && equals) { | |
| 212 nsCOMPtr<nsIFileURL> baseFileURL; | |
| 213 baseFileURL = do_QueryInterface(uri, &rv); | |
| 214 NS_ENSURE_SUCCESS(rv, rv); | |
| 215 | |
| 216 nsAutoCString path; | |
| 217 rv = baseFileURL->GetPath(path); | |
| 218 NS_ENSURE_SUCCESS(rv, rv); | |
| 219 | |
| 220 out.Append(path); | |
| 221 } else if (NS_SUCCEEDED(uri->SchemeIs("jar", &equals)) && equals) { | |
| 222 nsCOMPtr<nsIJARURI> jarURI = do_QueryInterface(uri, &rv); | |
| 223 NS_ENSURE_SUCCESS(rv, rv); | |
| 224 | |
| 225 nsCOMPtr<nsIURI> jarFileURI; | |
| 226 rv = jarURI->GetJARFile(getter_AddRefs(jarFileURI)); | |
| 227 NS_ENSURE_SUCCESS(rv, rv); | |
| 228 | |
| 229 rv = PathifyURI(jarFileURI, out); | |
| 230 NS_ENSURE_SUCCESS(rv, rv); | |
| 231 | |
| 232 nsAutoCString path; | |
| 233 rv = jarURI->GetJAREntry(path); | |
| 234 NS_ENSURE_SUCCESS(rv, rv); | |
| 235 out.Append("/"); | |
| 236 out.Append(path); | |
| 237 } else { // Very unlikely | |
| 238 nsAutoCString spec; | |
| 239 rv = uri->GetSpec(spec); | |
| 240 NS_ENSURE_SUCCESS(rv, rv); | |
| 241 | |
| 242 out.Append("/"); | |
| 243 out.Append(spec); | |
| 244 } | |
| 245 } | |
| 246 return NS_OK; | |
| 247 } | |
| 248 | |
| 249 } | |
| 250 } |
