| // Copyright 2013 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 "chrome/common/favicon/favicon_url_parser.h" |
| |
| #include "base/strings/string_number_conversions.h" |
| #include "components/favicon_base/favicon_types.h" |
| #include "net/url_request/url_request.h" |
| #include "ui/base/webui/web_ui_util.h" |
| #include "ui/gfx/favicon_size.h" |
| |
| namespace { |
| |
| // Parameters which can be used in chrome://favicon path. See file |
| // "chrome/browser/ui/webui/favicon_source.h" for a description of |
| // what each does. |
| const char kIconURLParameter[] = "iconurl/"; |
| const char kLargestParameter[] = "largest/"; |
| const char kOriginParameter[] = "origin/"; |
| const char kSizeParameter[] = "size/"; |
| |
| // Returns true if |search| is a substring of |path| which starts at |
| // |start_index|. |
| bool HasSubstringAt(const std::string& path, |
| size_t start_index, |
| const std::string& search) { |
| return path.compare(start_index, search.length(), search) == 0; |
| } |
| |
| } // namespace |
| |
| namespace chrome { |
| |
| bool ParseFaviconPath(const std::string& path, |
| int icon_types, |
| ParsedFaviconPath* parsed) { |
| parsed->is_icon_url = false; |
| parsed->url = ""; |
| parsed->size_in_dip = gfx::kFaviconSize; |
| parsed->device_scale_factor = 1.0f; |
| parsed->path_index = std::string::npos; |
| |
| if (path.empty()) |
| return false; |
| |
| size_t parsed_index = 0; |
| if (HasSubstringAt(path, parsed_index, kLargestParameter)) { |
| parsed_index += strlen(kLargestParameter); |
| parsed->size_in_dip = 0; |
| } else if (HasSubstringAt(path, parsed_index, kSizeParameter)) { |
| parsed_index += strlen(kSizeParameter); |
| |
| size_t slash = path.find("/", parsed_index); |
| if (slash == std::string::npos) |
| return false; |
| |
| size_t scale_delimiter = path.find("@", parsed_index); |
| std::string size_str; |
| std::string scale_str; |
| if (scale_delimiter == std::string::npos) { |
| // Support the legacy size format of 'size/aa/' where 'aa' is the desired |
| // size in DIP for the sake of not regressing the extensions which use it. |
| size_str = path.substr(parsed_index, slash - parsed_index); |
| } else { |
| size_str = path.substr(parsed_index, scale_delimiter - parsed_index); |
| scale_str = path.substr(scale_delimiter + 1, |
| slash - scale_delimiter - 1); |
| } |
| |
| if (!base::StringToInt(size_str, &parsed->size_in_dip)) |
| return false; |
| |
| if (parsed->size_in_dip != (gfx::kFaviconSize * 4) && |
| parsed->size_in_dip != (gfx::kFaviconSize * 2)) { |
| // Only 64x64, 32x32 and 16x16 icons are supported. |
| parsed->size_in_dip = gfx::kFaviconSize; |
| } |
| if (!scale_str.empty()) |
| webui::ParseScaleFactor(scale_str, &parsed->device_scale_factor); |
| |
| // Return the default favicon (as opposed to a resized favicon) for |
| // favicon sizes which are not cached by the favicon service. |
| // Currently the favicon service caches: |
| // - favicons of sizes "gfx::kFaviconSize * scale factor" px of type FAVICON |
| // where scale factor is one of FaviconUtil::GetFaviconScales(). |
| // - the largest TOUCH_ICON / TOUCH_PRECOMPOSED_ICON |
| if (parsed->size_in_dip != gfx::kFaviconSize && |
| icon_types == favicon_base::FAVICON) |
| return false; |
| |
| parsed_index = slash + 1; |
| } |
| |
| if (HasSubstringAt(path, parsed_index, kIconURLParameter)) { |
| parsed_index += strlen(kIconURLParameter); |
| parsed->is_icon_url = true; |
| parsed->url = path.substr(parsed_index); |
| } else { |
| // URL requests prefixed with "origin/" are converted to a form with an |
| // empty path and a valid scheme. (e.g., example.com --> |
| // http://example.com/ or http://example.com/a --> http://example.com/) |
| if (HasSubstringAt(path, parsed_index, kOriginParameter)) { |
| parsed_index += strlen(kOriginParameter); |
| std::string possibly_invalid_url = path.substr(parsed_index); |
| |
| // If the URL does not specify a scheme (e.g., example.com instead of |
| // http://example.com), add "http://" as a default. |
| if (!GURL(possibly_invalid_url).has_scheme()) |
| possibly_invalid_url = "http://" + possibly_invalid_url; |
| |
| // Strip the path beyond the top-level domain. |
| parsed->url = GURL(possibly_invalid_url).GetOrigin().spec(); |
| } else { |
| parsed->url = path.substr(parsed_index); |
| } |
| } |
| |
| // The parsed index needs to be returned in order to allow Instant Extended |
| // to translate favicon URLs using advanced parameters. |
| // Example: |
| // "chrome-search://favicon/size/16@2x/<renderer-id>/<most-visited-id>" |
| // would be translated to: |
| // "chrome-search://favicon/size/16@2x/<most-visited-item-with-given-id>". |
| parsed->path_index = parsed_index; |
| return true; |
| } |
| |
| } // namespace chrome |