1 files changed, 267 insertions, 0 deletions
diff --git a/webkit/glue/plugins/plugin_list_posix.cc b/webkit/glue/plugins/plugin_list_posix.cc
new file mode 100644
index 0000000..1fbd76f
--- /dev/null
+++ b/webkit/glue/plugins/plugin_list_posix.cc
@@ -0,0 +1,267 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "webkit/glue/plugins/plugin_list.h"
+
+#include "base/file_util.h"
+#include "base/path_service.h"
+#include "base/sha1.h"
+#include "base/string_util.h"
+#include "build/build_config.h"
+
+namespace {
+
+// We build up a list of files and mtimes so we can sort them.
+typedef std::pair<FilePath, base::Time> FileAndTime;
+typedef std::vector<FileAndTime> FileTimeList;
+
+// Comparator used to sort by descending mtime then ascending filename.
+bool CompareTime(const FileAndTime& a, const FileAndTime& b) {
+  if (a.second == b.second) {
+    // Fall back on filename sorting, just to make the predicate valid.
+    return a.first < b.first;
+  }
+
+  // Sort by mtime, descending.
+  return a.second > b.second;
+}
+
+// Return true if |path| matches a known (file size, sha1sum) pair.
+// The use of the file size is an optimization so we don't have to read in
+// the entire file unless we have to.
+bool IsBlacklistedBySha1sum(const FilePath& path) {
+  const struct BadEntry {
+    int64 size;
+    std::string sha1;
+  } bad_entries[] = {
+    // Flash 9 r31 - http://crbug.com/29237
+    { 7040080, "fa5803061125ca47846713b34a26a42f1f1e98bb" },
+    // Flash 9 r48 - http://crbug.com/29237
+    { 7040036, "0c4b3768a6d4bfba003088e4b9090d381de1af2b" },
+  };
+
+  int64 size;
+  if (!file_util::GetFileSize(path, &size))
+    return false;
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(bad_entries); i++) {
+    if (bad_entries[i].size != size)
+      continue;
+
+    std::string file_content;
+    if (!file_util::ReadFileToString(path, &file_content))
+      continue;
+    std::string sha1 = base::SHA1HashString(file_content);
+    std::string sha1_readable;
+    for (size_t j = 0; j < sha1.size(); j++)
+      StringAppendF(&sha1_readable, "%02x", sha1[j] & 0xFF);
+    if (bad_entries[i].sha1 == sha1_readable)
+      return true;
+  }
+  return false;
+}
+
+// Some plugins are shells around other plugins; we prefer to use the
+// real plugin directly, if it's available.  This function returns
+// true if we should prefer other plugins over this one.  We'll still
+// use a "undesirable" plugin if no other option is available.
+bool IsUndesirablePlugin(const WebPluginInfo& info) {
+  std::string filename = info.path.BaseName().value();
+  const char* kUndesiredPlugins[] = {
+    "npcxoffice",  // Crossover
+    "npwrapper",   // nspluginwrapper
+  };
+  for (size_t i = 0; i < arraysize(kUndesiredPlugins); i++) {
+    if (filename.find(kUndesiredPlugins[i]) != std::string::npos) {
+      return true;
+    }
+  }
+  return false;
+}
+
+// Return true if we shouldn't load a plugin at all.
+// This is an ugly hack to blacklist Adobe Acrobat due to not supporting
+// its Xt-based mainloop.
+// http://code.google.com/p/chromium/issues/detail?id=38229
+// The gecko-mediaplayer plugins also crashes the entire browser sometimes.
+// http://code.google.com/p/chromium/issues/detail?id=24507
+bool IsBlacklistedPlugin(const FilePath& path) {
+  const char* kBlackListedPlugins[] = {
+    "nppdf.so",           // Adobe PDF
+    "gecko-mediaplayer",  // Gecko Media Player
+  };
+  std::string filename = path.BaseName().value();
+  for (size_t i = 0; i < arraysize(kBlackListedPlugins); i++) {
+    if (filename.find(kBlackListedPlugins[i]) != std::string::npos) {
+      return true;
+    }
+  }
+  return IsBlacklistedBySha1sum(path);
+}
+
+}  // anonymous namespace
+
+namespace NPAPI {
+
+void PluginList::PlatformInit() {
+}
+
+void PluginList::GetPluginDirectories(std::vector<FilePath>* plugin_dirs) {
+  // See http://groups.google.com/group/chromium-dev/browse_thread/thread/7a70e5fcbac786a9
+  // for discussion.
+  // We first consult Chrome-specific dirs, then fall back on the logic
+  // Mozilla uses.
+
+  // Note: "extra" plugin dirs, including the Plugins subdirectory of
+  // your Chrome config, are examined before these.  See the logic
+  // related to extra_plugin_dirs in plugin_list.cc.
+
+  // The Chrome binary dir + "plugins/".
+  FilePath dir;
+  PathService::Get(base::DIR_EXE, &dir);
+  plugin_dirs->push_back(dir.Append("plugins"));
+
+  // Mozilla code to reference:
+  // http://mxr.mozilla.org/firefox/ident?i=NS_APP_PLUGINS_DIR_LIST
+  // and tens of accompanying files (mxr is very helpful).
+  // This code carefully matches their behavior for compat reasons.
+
+  // 1) MOZ_PLUGIN_PATH env variable.
+  const char* moz_plugin_path = getenv("MOZ_PLUGIN_PATH");
+  if (moz_plugin_path) {
+    std::vector<std::string> paths;
+    SplitString(moz_plugin_path, ':', &paths);
+    for (size_t i = 0; i < paths.size(); ++i)
+      plugin_dirs->push_back(FilePath(paths[i]));
+  }
+
+  // 2) NS_USER_PLUGINS_DIR: ~/.mozilla/plugins.
+  // This is a de-facto standard, so even though we're not Mozilla, let's
+  // look in there too.
+  FilePath home = file_util::GetHomeDir();
+  if (!home.empty())
+    plugin_dirs->push_back(home.Append(".mozilla/plugins"));
+
+  // 3) NS_SYSTEM_PLUGINS_DIR:
+  // This varies across different browsers and versions, so check 'em all.
+  plugin_dirs->push_back(FilePath("/usr/lib/browser-plugins"));
+  plugin_dirs->push_back(FilePath("/usr/lib/mozilla/plugins"));
+  plugin_dirs->push_back(FilePath("/usr/lib/firefox/plugins"));
+  plugin_dirs->push_back(FilePath("/usr/lib/xulrunner-addons/plugins"));
+
+#if defined(ARCH_CPU_64_BITS)
+  // On my Ubuntu system, /usr/lib64 is a symlink to /usr/lib.
+  // But a user reported on their Fedora system they are separate.
+  plugin_dirs->push_back(FilePath("/usr/lib64/browser-plugins"));
+  plugin_dirs->push_back(FilePath("/usr/lib64/mozilla/plugins"));
+  plugin_dirs->push_back(FilePath("/usr/lib64/firefox/plugins"));
+  plugin_dirs->push_back(FilePath("/usr/lib64/xulrunner-addons/plugins"));
+#endif
+}
+
+void PluginList::LoadPluginsFromDir(const FilePath& dir_path,
+                                    std::vector<WebPluginInfo>* plugins,
+                                    std::set<FilePath>* visited_plugins) {
+  // See ScanPluginsDirectory near
+  // http://mxr.mozilla.org/firefox/source/modules/plugin/base/src/nsPluginHostImpl.cpp#5052
+
+  // Construct and stat a list of all filenames under consideration, for
+  // later sorting by mtime.
+  FileTimeList files;
+  file_util::FileEnumerator enumerator(dir_path,
+                                       false,  // not recursive
+                                       file_util::FileEnumerator::FILES);
+  for (FilePath path = enumerator.Next(); !path.value().empty();
+       path = enumerator.Next()) {
+    // Skip over Mozilla .xpt files.
+    if (path.MatchesExtension(FILE_PATH_LITERAL(".xpt")))
+      continue;
+
+    // Java doesn't like being loaded through a symlink, since it uses
+    // its path to find dependent data files.
+    // file_util::AbsolutePath calls through to realpath(), which resolves
+    // symlinks.
+    FilePath orig_path = path;
+    file_util::AbsolutePath(&path);
+    LOG_IF(INFO, PluginList::DebugPluginLoading())
+        << "Resolved " << orig_path.value() << " -> " << path.value();
+
+    if (visited_plugins->find(path) != visited_plugins->end()) {
+      LOG_IF(INFO, PluginList::DebugPluginLoading())
+          << "Skipping duplicate instance of " << path.value();
+      continue;
+    }
+    visited_plugins->insert(path);
+
+    if (IsBlacklistedPlugin(path)) {
+      LOG_IF(INFO, PluginList::DebugPluginLoading())
+          << "Skipping blacklisted plugin " << path.value();
+      continue;
+    }
+
+    // Flash stops working if the containing directory involves 'netscape'.
+    // No joke.  So use the other path if it's better.
+    static const char kFlashPlayerFilename[] = "libflashplayer.so";
+    static const char kNetscapeInPath[] = "/netscape/";
+    if (path.BaseName().value() == kFlashPlayerFilename &&
+        path.value().find(kNetscapeInPath) != std::string::npos) {
+      if (orig_path.value().find(kNetscapeInPath) == std::string::npos) {
+        // Go back to the old path.
+        path = orig_path;
+      } else {
+        LOG(ERROR) << "Flash misbehaves when used from a directory containing "
+                   << kNetscapeInPath << ", so skipping " << orig_path.value();
+        continue;
+      }
+    }
+
+    // Get mtime.
+    file_util::FileInfo info;
+    if (!file_util::GetFileInfo(path, &info))
+      continue;
+
+    files.push_back(std::make_pair(path, info.last_modified));
+  }
+
+  // Sort the file list by time (and filename).
+  std::sort(files.begin(), files.end(), CompareTime);
+
+  // Load the files in order.
+  for (FileTimeList::const_iterator i = files.begin(); i != files.end(); ++i) {
+    LoadPlugin(i->first, plugins);
+  }
+}
+
+
+bool PluginList::ShouldLoadPlugin(const WebPluginInfo& info,
+                                  std::vector<WebPluginInfo>* plugins) {
+  LOG_IF(INFO, PluginList::DebugPluginLoading())
+      << "Considering " << info.path.value() << " (" << info.name << ")";
+
+  if (IsUndesirablePlugin(info)) {
+    LOG_IF(INFO, PluginList::DebugPluginLoading())
+        << info.path.value() << " is undesirable.";
+
+    // See if we have a better version of this plugin.
+    for (size_t i = 0; i < plugins->size(); ++i) {
+      if (plugins->at(i).name == info.name &&
+          !IsUndesirablePlugin(plugins->at(i))) {
+        // Skip the current undesirable one so we can use the better one
+        // we just found.
+        LOG_IF(INFO, PluginList::DebugPluginLoading())
+            << "Skipping " << info.path.value() << ", preferring "
+            << plugins->at(i).path.value();
+        return false;
+      }
+    }
+  }
+
+  // TODO(evanm): prefer the newest version of flash, etc. here?
+
+  LOG_IF(INFO, PluginList::DebugPluginLoading())
+      << "Using " << info.path.value();
+
+  return true;
+}
+
+}  // namespace NPAPI