runrunmeme / chromium

Open-source project behind Google Chrome

Chromium

The main Chromium project is located at https://www.chromium.org/.

The source code is available at https://chromium.googlesource.com/.

Instructions for contributing can be found at https://www.chromium.org/developers.

chromium's Issues

chromium解析meta charset

TextResourceDecoderBuilder类

数据成员：

• mime_type_ mime类型
• encoding_ 编码
  成员方法：
• TextResourceDecoderBuilder
• ~TextResourceDecoderBuilder 析构
• CreateDecoderInstance 创建解码器实例
• SetupEncoding 设置编码
• BuildFor
  1. 创建解码器 call CreateDecoderInstance
  2. 设置编码 call SetupEncoding
     返回编码器
• Clear 清除

TextResourceDecoder类

• [E] EncodingSource

    kDefaultEncoding,
    kAutoDetectedEncoding,
    kEncodingFromContentSniffing,
    kEncodingFromXMLHeader,
    kEncodingFromMetaTag,
    kEncodingFromCSSCharset,
    kEncodingFromHTTPHeader,
    kEncodingFromParentFrame

• Create 默认编码

• CreateWithAutoDetection 创建TextResourceDecoder实例，使用自动检测

• CreateAlwaysUseUTF8ForText 创建TextResourceDecoder实例，使用UTF8

• SetEncoding 设置encoding_

• Encoding 返回encoding_

• bool EncodingWasDetectedHeuristically 是否通过嗅探检测编码

• Decode

• Flush
  处理文档已经完全loaded，还确定不了编码的情况
  在使用自动检测编码时，根据文本的编码确定encoding_

• SetHintEncoding

• UseLenientXMLDecoding 设置use_lenient_xml_decoding_ 宽容的xml解码

• SawError 是否有错误

• CheckForBOM

• [E] EncodingDetectionOption

• TextResourceDecoder

• [E] ContentType

• DetermineContentType

• DefaultEncoding 默认编码

• CheckForCSSCharset

• CheckForXMLCharset

• CheckForMetaCharset

• ShouldAutoDetect

• ContentType content_type_;

• WTF::TextEncoding encoding_; 编码

• std::unique_ptr codec_;

• EncodingSource source_;
  const char* hint_encoding_;
  const KURL hint_url_;
  Vector buffer_;
  char hint_language_[3];
  bool checked_for_bom_;
  bool checked_for_css_charset_;
  bool checked_for_xml_charset_;
  bool checked_for_meta_charset_;
  bool use_lenient_xml_decoding_; // Don't stop on XML decoding errors.
  bool saw_error_;
  EncodingDetectionOption encoding_detection_option_;

  std::unique_ptr charset_parser_;

HTMLMetaCharsetParser 类

成员方法：

• Create 创建HTMLMetaCharsetParser实例，使用unique_ptr
• CheckForMetaCharset
• Encoding 返回encoding_
• ProcessMeta 根据meta token，设置encoding_

成员变量：

• tokenizer_
• assumed_codec_
• input_
• HTMLToken token_
• bool in_head_section_ 是否位于head里
• bool done_checking_ 是否完成检测
• encoding_ 编码