Chrome网络库的请求处理

最新推荐文章于 2024-09-06 20:41:51 发布

原创最新推荐文章于 2024-09-06 20:41:51 发布 · 1.9k 阅读

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#网络 #chrome #socket #io #url

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本文详细解析了HTTP资源加载过程中的关键步骤，从发起请求到获取响应的整个流程，包括缓存处理、网络交互等核心环节。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

ResourceLoaderAndroid::start
->WebUrlLoader::start (或者 clientAndroid->webFrame()->startLoadingResource)
->WebUrlLoaderClient::start

创建一个网络线程来处理请求

->thread->message_loop()->PostTask(FROM_HERE, NewRunnableMethod(m_request.get(), &WebRequest::start));

---------------------------------------------------------------------------------

网络线程

->WebRequest::start
->net::URLRequest::start
根据URL类型创建不同的Job,并启动URLRequestXXXXJob::Start

【Http】
->URLRequestHttpJob::Start
->AddExtraHeaders()
->取Cookie

->创建HttpCacheTransaction

HttpCacheTransaction

->启动事务HttpCache::Transaction::Start

->循环Doloop() 状态机

do {
switch (state) {
DoGetBackend();
    DoGetBackendComplete(rv);
DoSendRequest();
    DoSendRequestComplete(rv);
DoSuccessfulSendRequest();
DoNetworkRead();
    DoNetworkReadComplete(rv);
DoInitEntry();
DoOpenEntry();
    DoOpenEntryComplete(rv);
DoCreateEntry();
    DoCreateEntryComplete(rv);
DoDoomEntry();
    DoDoomEntryComplete(rv);
DoAddToEntry();
    DoAddToEntryComplete(rv);
DoNotifyBeforeSendHeaders();
    DoNotifyBeforeSendHeadersComplete(rv);
DoStartPartialCacheValidation();
DoCompletePartialCacheValidation(rv);
DoUpdateCachedResponse();
    DoUpdateCachedResponseComplete(rv);
DoOverwriteCachedResponse();
DoTruncateCachedData();
    DoTruncateCachedDataComplete(rv);
DoTruncateCachedMetadata();
    DoTruncateCachedMetadataComplete(rv);
DoPartialHeadersReceived();
DoCacheReadResponse();
    DoCacheReadResponseComplete(rv);
DoCacheWriteResponse();
DoCacheWriteTruncatedResponse();
    DoCacheWriteResponseComplete(rv);
DoCacheReadMetadata();
    DoCacheReadMetadataComplete(rv);
DoCacheQueryData();
    DoCacheQueryDataComplete(rv);
DoCacheReadData();
    DoCacheReadDataComplete(rv);
DoCacheWriteData(rv);
    DoCacheWriteDataComplete(rv);
}
} while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);

->创建HttpNeworkTransaction (HttpCacheTransaction::DoSendRequest)

HttpNeworkTransaction
->启动事务HttpNetworkTransaction::Start

->循环DoLoop() 状态机

do {
switch (state) {
DoCreateStream();
DoCreateStreamComplete(rv);
DoInitStream();
DoInitStreamComplete(rv);
DoGenerateProxyAuthToken();
DoGenerateProxyAuthTokenComplete(rv);
DoGenerateServerAuthToken();
DoGenerateServerAuthTokenComplete(rv);
DoBuildRequest();
DoBuildRequestComplete(rv);
DoSendRequest(); Socket阻塞发送
DoSendRequestComplete(rv);
DoReadHeaders(); Socket阻塞读取
DoReadHeadersComplete(rv);
DoReadBody(); Socket阻塞读取
DoReadBodyComplete(rv);
DoDrainBodyForAuthRestart();
DoDrainBodyForAuthRestartComplete(rv);
}
} while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);

【Ftp】