Application Cache manifest 的处理 (Webkit)

来源：互联网发布：javascript 服务端编辑：程序博客网时间：2024/05/17 22:41

缓存构成 url+.manifest+manifest 或者 url (没有manifest)

webkit解析html标签,发送(异步).manifest请求

->HTMLTreeBuilder::processStartTag

->HTMLConstructionSite::insertHTMLHtmlStartTagBeforeHTML

->HTMLHtmlElement::insertedByParser

->documentLoader->applicationCacheHost()->selectCacheWithManifest或者selectCacheWithoutManifest

(创建ApplicationCacheGroup)

->ApplicationCacheGroup::update->ApplicationCacheGroup::createResourceHandle

发送manifest请求,ApplicationCacheGroup作为ResourceHandleClient

-----------------异步-------------------

根据.manifest发送(异步)缓存请求

->ApplicationCacheGroup::didReceiveResponse

->ApplicationCacheGroup::didReceiveData

收到manifest

->ApplicationCacheGroup::didFinishLoading

解析manifest (缓存队列)

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

->ApplicationCacheGroup::startLoadingEntry

->ApplicationCacheGroup::createResourceHandle

依次发送请求获取缓存资源

->ApplicationCacheGroup::didReceiveResponse

->ApplicationCacheResource::create (创建CacheResource)

->ApplicationCacheGroup::didReceiveData

->(填充CacheResource)

->ApplicationCacheGroup::didFinishLoading

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

保存缓存

->ApplicationCacheGroup::deliverDelayedMainResources

->finishedLoadingMainResource

->创建主url的CacheResource

->ApplicationCacheGroup::checkIfLoadIsComplete

->ApplicationCacheStorage::storeNewestCache

保存在.db文件里面

*******************************************

第二次访问根据url映射从本地数据库取缓存

->MainResourceLoader::load

->ApplicationCacheHost::maybeLoadMainResource

->ApplicationCacheGroup::cacheForMainRequest

->SubstituteData(resource->data(), resource->response().mimeType(), resource->response().textEncodingName(), KURL());

获得缓存数据

->(同步)MainResourceLoader::didReceiveResponse

->(同步)MainResourceLoader::didReceiveData