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●xmlrequest的用法 test ●Source/WebCore/xml/XMLHttpRequest.idlenum XMLHttpRequestResponseType { "", "arraybuffer", "blob", "document", "json", "text"};[ GlobalContext=DOMWindow&WorkerGlobalScope,//构造函数被添加到window同时WorkerGlobalScope之上 ActiveDOMObject,//指定DOM对象保持激活状态(只要有事件状态下),webcore实现需要继承 public ActiveDOMObject Constructor,//js调用形式为new Object() ConstructorCallWith=ScriptExecutionContext,//参数首个加入ScriptExecutionContext JSCustomMarkFunction,//自定义JSCbinging的代码( JSXXX::visitChildren() ） EventTarget,//对应需要重载 addEventListener() removeEventListener() 具备事件管理的能力 JSNoStaticTables//默认情况为单一的property table,如果要求每个用户维护不同的表,则需要设定该flag] interface XMLHttpRequest { // event handler attributes attribute EventListener onabort; attribute EventListener onerror; attribute EventListener onload; attribute EventListener onloadend; attribute EventListener onloadstart; attribute EventListener onprogress; [Conditional=XHR_TIMEOUT] attribute EventListener ontimeout; // event handler attributes //用法: g_xmlHttpReq.onreadystatechange=onReplyCallback; attribute EventListener onreadystatechange; // state const unsigned short UNSENT = 0; const unsigned short OPENED = 1; const unsigned short HEADERS_RECEIVED = 2; const unsigned short LOADING = 3; const unsigned short DONE = 4; [Conditional=XHR_TIMEOUT, SetterRaisesException] attribute unsigned long timeout; //if(g_xmlHttpReq.readyState==4 && g_xmlHttpReq.status==200) readonly attribute unsigned short readyState; [SetterRaisesException] attribute boolean withCredentials; // optional修饰表示可传,可不传 // g_xmlHttpReq.open("GET","./service/main.php?cmd=1",true); [Custom, RaisesException] void open(DOMString method, DOMString url, optional boolean async, optional DOMString user, optional DOMString password); // xmlHttpRequest可以精确到任何可能的HTTP的字段的模拟 [RaisesException] void setRequestHeader(DOMString header, DOMString value); //在webcore实现的参数中末尾追加(ExceptionCode& ec) //JSValue JSXMLHttpRequest::send(ExecState* exec) [Custom, RaisesException] void send(); void abort(); readonly attribute XMLHttpRequestUpload upload; // response [TreatReturnedNullStringAs=Undefined, RaisesException] DOMString getAllResponseHeaders(); [TreatReturnedNullStringAs=Null, RaisesException] DOMString getResponseHeader(DOMString header); // JSValue JSXMLHttpRequest::responseText(ExecState* exec) const [GetterRaisesException, CustomGetter] readonly attribute DOMString responseText; // The custom getter implements TreatReturnedNullStringAs=Null [GetterRaisesException] readonly attribute Document responseXML; [SetterRaisesException] attribute XMLHttpRequestResponseType responseType; // JSValue JSXMLHttpRequest::send(ExecState* exec) [GetterRaisesException, CustomGetter] readonly attribute Object response; [GetterRaisesException] readonly attribute unsigned short status; [GetterRaisesException] readonly attribute DOMString statusText; // Extension void overrideMimeType(DOMString override); // EventTarget interface void addEventListener(DOMString type, EventListener listener, optional boolean useCapture); void removeEventListener(DOMString type, EventListener listener, optional boolean useCapture); [RaisesException] boolean dispatchEvent(Event evt);};● Source/WebCore/bindings/js/JSXMLHttpRequestCustom.cpp## 局部函数进行自定义实现● Source/WebCore/xml/XMLHttpRequest.cpp●创建对象PassRefPtr XMLHttpRequest::create(ScriptExecutionContext* context){}## 构造对象XMLHttpRequest::XMLHttpRequest(ScriptExecutionContext* context){}## 访问DocumentDocument* XMLHttpRequest::document() const{ return static_cast (scriptExecutionContext());}## 获取安全策略SecurityOrigin* XMLHttpRequest::securityOrigin() const>>return scriptExecutionContext()->securityOrigin();## 访问XHR的运行状态XMLHttpRequest::State XMLHttpRequest::readyState() const>>return m_state;String XMLHttpRequest::responseText(ExceptionCode& ec)>>return m_responseBuilder.toStringPreserveCapacity();Document* XMLHttpRequest::responseXML(ExceptionCode& ec)>> m_responseDocument = HTMLDocument::create(0, m_url);>> m_responseDocument = Document::create(0, m_url);>> m_responseDocument->setContent(m_responseBuilder.toStringPreserveCapacity());>> return m_responseDocument.get();ArrayBuffer* XMLHttpRequest::responseArrayBuffer(ExceptionCode& ec)## 上传对象XMLHttpRequestUpload* XMLHttpRequest::upload()>>m_upload = XMLHttpRequestUpload::create(this);## 改变状态void XMLHttpRequest::changeState(State newState)>>if (m_state != newState) >>callReadyStateChangeListener();void XMLHttpRequest::send(Document* document, ExceptionCode& ec)>>setRequestHeaderInternal("Content-Type", "application/xml");>>createRequest(ec);void XMLHttpRequest::send(ArrayBuffer* body, ExceptionCode& ec)>>sendBytesData(body->data(), body->byteLength(), ec);>>createRequest(ec);void XMLHttpRequest::send(ArrayBufferView* body, ExceptionCode& ec)>>sendBytesData(body->baseAddress(), body->byteLength(), ec);>>>>createRequest(ec);void XMLHttpRequest::createRequest(ExceptionCode& ec)>>通知>>ResourceRequest request(m_url);>>request.setHTTPMethod(m_method);>>ThreadableLoader::loadResourceSynchronously(scriptExecutionContext(), request, *this, options);>>m_loader = ThreadableLoader::create(scriptExecutionContext(), this, request, options);
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