extensions/common/user_script.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "extensions/common/user_script.h"
   6
   7 #include "base/atomic_sequence_num.h"
   8 #include "base/command_line.h"
   9 #include "base/pickle.h"
  10 #include "base/strings/string_util.h"
  11 #include "extensions/common/switches.h"
  12
  13 namespace {
  14
  15 // This cannot be a plain int or int64 because we need to generate unique IDs
  16 // from multiple threads.
  17 base::StaticAtomicSequenceNumber g_user_script_id_generator;
  18
  19 bool UrlMatchesGlobs(const std::vector<std::string>* globs,
  20                      const GURL& url) {
  21   for (std::vector<std::string>::const_iterator glob = globs->begin();
  22        glob != globs->end(); ++glob) {
  23     if (MatchPattern(url.spec(), *glob))
  24       return true;
  25   }
  26
  27   return false;
  28 }
  29
  30 }  // namespace
  31
  32 namespace extensions {
  33
  34 // The bitmask for valid user script injectable schemes used by URLPattern.
  35 enum {
  36   kValidUserScriptSchemes = URLPattern::SCHEME_CHROMEUI |
  37                             URLPattern::SCHEME_HTTP |
  38                             URLPattern::SCHEME_HTTPS |
  39                             URLPattern::SCHEME_FILE |
  40                             URLPattern::SCHEME_FTP
  41 };
  42
  43 // static
  44 const char UserScript::kFileExtension[] = ".user.js";
  45
  46
  47 // static
  48 int UserScript::GenerateUserScriptID() {
  49    return g_user_script_id_generator.GetNext();
  50 }
  51
  52 bool UserScript::IsURLUserScript(const GURL& url,
  53                                  const std::string& mime_type) {
  54   return EndsWith(url.ExtractFileName(), kFileExtension, false) &&
  55       mime_type != "text/html";
  56 }
  57
  58 // static
  59 int UserScript::ValidUserScriptSchemes(bool canExecuteScriptEverywhere) {
  60   if (canExecuteScriptEverywhere)
  61     return URLPattern::SCHEME_ALL;
  62   int valid_schemes = kValidUserScriptSchemes;
  63   if (!CommandLine::ForCurrentProcess()->HasSwitch(
  64       switches::kExtensionsOnChromeURLs)) {
  65     valid_schemes &= ~URLPattern::SCHEME_CHROMEUI;
  66   }
  67   return valid_schemes;
  68 }
  69
  70 UserScript::File::File(const base::FilePath& extension_root,
  71                        const base::FilePath& relative_path,
  72                        const GURL& url)
  73     : extension_root_(extension_root),
  74       relative_path_(relative_path),
  75       url_(url) {
  76 }
  77
  78 UserScript::File::File() {}
  79
  80 UserScript::File::~File() {}
  81
  82 UserScript::UserScript()
  83     : run_location_(DOCUMENT_IDLE),
  84       user_script_id_(-1),
  85       emulate_greasemonkey_(false),
  86       match_all_frames_(false),
  87       match_about_blank_(false),
  88       incognito_enabled_(false) {}
  89
  90 UserScript::~UserScript() {
  91 }
  92
  93 void UserScript::add_url_pattern(const URLPattern& pattern) {
  94   url_set_.AddPattern(pattern);
  95 }
  96
  97 void UserScript::add_exclude_url_pattern(const URLPattern& pattern) {
  98   exclude_url_set_.AddPattern(pattern);
  99 }
 100
 101 bool UserScript::MatchesURL(const GURL& url) const {
 102   if (!url_set_.is_empty()) {
 103     if (!url_set_.MatchesURL(url))
 104       return false;
 105   }
 106
 107   if (!exclude_url_set_.is_empty()) {
 108     if (exclude_url_set_.MatchesURL(url))
 109       return false;
 110   }
 111
 112   if (!globs_.empty()) {
 113     if (!UrlMatchesGlobs(&globs_, url))
 114       return false;
 115   }
 116
 117   if (!exclude_globs_.empty()) {
 118     if (UrlMatchesGlobs(&exclude_globs_, url))
 119       return false;
 120   }
 121
 122   return true;
 123 }
 124
 125 void UserScript::File::Pickle(::Pickle* pickle) const {
 126   pickle->WriteString(url_.spec());
 127   // Do not write path. It's not needed in the renderer.
 128   // Do not write content. It will be serialized by other means.
 129 }
 130
 131 void UserScript::File::Unpickle(const ::Pickle& pickle, PickleIterator* iter) {
 132   // Read the url from the pickle.
 133   std::string url;
 134   CHECK(pickle.ReadString(iter, &url));
 135   set_url(GURL(url));
 136 }
 137
 138 void UserScript::Pickle(::Pickle* pickle) const {
 139   // Write the simple types to the pickle.
 140   pickle->WriteInt(run_location());
 141   pickle->WriteString(extension_id());
 142   pickle->WriteInt(user_script_id_);
 143   pickle->WriteBool(emulate_greasemonkey());
 144   pickle->WriteBool(match_all_frames());
 145   pickle->WriteBool(match_about_blank());
 146   pickle->WriteBool(is_incognito_enabled());
 147
 148   PickleGlobs(pickle, globs_);
 149   PickleGlobs(pickle, exclude_globs_);
 150   PickleURLPatternSet(pickle, url_set_);
 151   PickleURLPatternSet(pickle, exclude_url_set_);
 152   PickleScripts(pickle, js_scripts_);
 153   PickleScripts(pickle, css_scripts_);
 154 }
 155
 156 void UserScript::PickleGlobs(::Pickle* pickle,
 157                              const std::vector<std::string>& globs) const {
 158   pickle->WriteUInt64(globs.size());
 159   for (std::vector<std::string>::const_iterator glob = globs.begin();
 160        glob != globs.end(); ++glob) {
 161     pickle->WriteString(*glob);
 162   }
 163 }
 164
 165 void UserScript::PickleURLPatternSet(::Pickle* pickle,
 166                                      const URLPatternSet& pattern_list) const {
 167   pickle->WriteUInt64(pattern_list.patterns().size());
 168   for (URLPatternSet::const_iterator pattern = pattern_list.begin();
 169        pattern != pattern_list.end(); ++pattern) {
 170     pickle->WriteInt(pattern->valid_schemes());
 171     pickle->WriteString(pattern->GetAsString());
 172   }
 173 }
 174
 175 void UserScript::PickleScripts(::Pickle* pickle,
 176                                const FileList& scripts) const {
 177   pickle->WriteUInt64(scripts.size());
 178   for (FileList::const_iterator file = scripts.begin();
 179        file != scripts.end(); ++file) {
 180     file->Pickle(pickle);
 181   }
 182 }
 183
 184 void UserScript::Unpickle(const ::Pickle& pickle, PickleIterator* iter) {
 185   // Read the run location.
 186   int run_location = 0;
 187   CHECK(pickle.ReadInt(iter, &run_location));
 188   CHECK(run_location >= 0 && run_location < RUN_LOCATION_LAST);
 189   run_location_ = static_cast<RunLocation>(run_location);
 190
 191   CHECK(pickle.ReadString(iter, &extension_id_));
 192   CHECK(pickle.ReadInt(iter, &user_script_id_));
 193   CHECK(pickle.ReadBool(iter, &emulate_greasemonkey_));
 194   CHECK(pickle.ReadBool(iter, &match_all_frames_));
 195   CHECK(pickle.ReadBool(iter, &match_about_blank_));
 196   CHECK(pickle.ReadBool(iter, &incognito_enabled_));
 197
 198   UnpickleGlobs(pickle, iter, &globs_);
 199   UnpickleGlobs(pickle, iter, &exclude_globs_);
 200   UnpickleURLPatternSet(pickle, iter, &url_set_);
 201   UnpickleURLPatternSet(pickle, iter, &exclude_url_set_);
 202   UnpickleScripts(pickle, iter, &js_scripts_);
 203   UnpickleScripts(pickle, iter, &css_scripts_);
 204 }
 205
 206 void UserScript::UnpickleGlobs(const ::Pickle& pickle, PickleIterator* iter,
 207                                std::vector<std::string>* globs) {
 208   uint64 num_globs = 0;
 209   CHECK(pickle.ReadUInt64(iter, &num_globs));
 210   globs->clear();
 211   for (uint64 i = 0; i < num_globs; ++i) {
 212     std::string glob;
 213     CHECK(pickle.ReadString(iter, &glob));
 214     globs->push_back(glob);
 215   }
 216 }
 217
 218 void UserScript::UnpickleURLPatternSet(const ::Pickle& pickle,
 219                                        PickleIterator* iter,
 220                                        URLPatternSet* pattern_list) {
 221   uint64 num_patterns = 0;
 222   CHECK(pickle.ReadUInt64(iter, &num_patterns));
 223
 224   pattern_list->ClearPatterns();
 225   for (uint64 i = 0; i < num_patterns; ++i) {
 226     int valid_schemes;
 227     CHECK(pickle.ReadInt(iter, &valid_schemes));
 228
 229     std::string pattern_str;
 230     CHECK(pickle.ReadString(iter, &pattern_str));
 231
 232     URLPattern pattern(kValidUserScriptSchemes);
 233     URLPattern::ParseResult result = pattern.Parse(pattern_str);
 234     CHECK(URLPattern::PARSE_SUCCESS == result) <<
 235         URLPattern::GetParseResultString(result) << " " << pattern_str.c_str();
 236
 237     pattern.SetValidSchemes(valid_schemes);
 238     pattern_list->AddPattern(pattern);
 239   }
 240 }
 241
 242 void UserScript::UnpickleScripts(const ::Pickle& pickle, PickleIterator* iter,
 243                                  FileList* scripts) {
 244   uint64 num_files = 0;
 245   CHECK(pickle.ReadUInt64(iter, &num_files));
 246   scripts->clear();
 247   for (uint64 i = 0; i < num_files; ++i) {
 248     File file;
 249     file.Unpickle(pickle, iter);
 250     scripts->push_back(file);
 251   }
 252 }
 253
 254 bool operator<(const UserScript& script1, const UserScript& script2) {
 255   // The only kind of script that should be compared is the kind that has its
 256   // IDs initialized to a meaningful value.
 257   DCHECK(script1.id() != -1 && script2.id() != -1);
 258   return script1.id() < script2.id();
 259 }
 260
 261 }  // namespace extensions