| // Copyright 2015 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| #include "cobalt/csp/media_list_directive.h" |
| |
| namespace cobalt { |
| namespace csp { |
| |
| MediaListDirective::MediaListDirective(const std::string& name, |
| const std::string& value, |
| ContentSecurityPolicy* policy) |
| : Directive(name, value, policy) { |
| Parse(base::StringPiece(value)); |
| } |
| |
| bool MediaListDirective::Allows(const std::string& type) const { |
| return plugin_types_.find(type) != plugin_types_.end(); |
| } |
| |
| void MediaListDirective::Parse(const base::StringPiece& str) { |
| const char* begin = str.begin(); |
| const char* end = str.end(); |
| const char* position = begin; |
| |
| // 'plugin-types ____;' OR 'plugin-types;' |
| if (position == end) { |
| policy()->ReportInvalidPluginTypes(std::string()); |
| return; |
| } |
| |
| while (position < end) { |
| // _____ OR _____mime1/mime1 |
| // ^ ^ |
| SkipWhile<IsAsciiWhitespace>(&position, end); |
| if (position == end) { |
| return; |
| } |
| |
| // mime1/mime1 mime2/mime2 |
| // ^ |
| begin = position; |
| if (!SkipExactly<IsMediaTypeCharacter>(&position, end)) { |
| SkipWhile<IsNotAsciiWhitespace>(&position, end); |
| policy()->ReportInvalidPluginTypes(ToString(begin, position)); |
| continue; |
| } |
| SkipWhile<IsMediaTypeCharacter>(&position, end); |
| |
| // mime1/mime1 mime2/mime2 |
| // ^ |
| if (!SkipExactly(&position, end, '/')) { |
| SkipWhile<IsNotAsciiWhitespace>(&position, end); |
| policy()->ReportInvalidPluginTypes(ToString(begin, position)); |
| continue; |
| } |
| |
| // mime1/mime1 mime2/mime2 |
| // ^ |
| if (!SkipExactly<IsMediaTypeCharacter>(&position, end)) { |
| SkipWhile<IsNotAsciiWhitespace>(&position, end); |
| policy()->ReportInvalidPluginTypes(ToString(begin, position)); |
| continue; |
| } |
| SkipWhile<IsMediaTypeCharacter>(&position, end); |
| |
| // mime1/mime1 mime2/mime2 OR mime1/mime1 OR mime1/mime1/error |
| // ^ ^ ^ |
| if (position < end && IsNotAsciiWhitespace(*position)) { |
| SkipWhile<IsNotAsciiWhitespace>(&position, end); |
| policy()->ReportInvalidPluginTypes(ToString(begin, position)); |
| continue; |
| } |
| plugin_types_.insert(ToString(begin, position)); |
| |
| DCHECK(position == end || IsAsciiWhitespace(*position)); |
| } |
| } |
| |
| } // namespace csp |
| } // namespace cobalt |