MVC系列（3） HttpRuntime详解分析（下）

文章内容

话说，经过各种各样复杂的我们不知道的内部处理，非托管代码正式开始调用ISPAIRuntime的 ProcessRequest方法了（ISPAIRuntime继承了IISPAIRuntime接口，该接口可以和COM进行交互，并且暴露了 ProcessRequest接口方法）。至于为什么要调用这个方法，大叔也不太清楚，找不到微软相关的资料哦。但大叔确定该方法就是我们进入 HttpRuntime的正式大门，接着看吧。

public int ProcessRequest(IntPtr ecb, int iWRType) {  

    IntPtr pHttpCompletion = IntPtr.Zero;  

    if (iWRType == WORKER_REQUEST_TYPE_IN_PROC_VERSION_2) {  

        pHttpCompletion = ecb;  

        ecb = UnsafeNativeMethods.GetEcb(pHttpCompletion);  

    }  

    ISAPIWorkerRequest wr = null;  

    try {  

        bool useOOP = (iWRType == WORKER_REQUEST_TYPE_OOP);  

        wr = ISAPIWorkerRequest.CreateWorkerRequest(ecb, useOOP);  

        wr.Initialize();  

        // check if app path matches (need to restart app domain?)  

        String wrPath = wr.GetAppPathTranslated();  

        String adPath = HttpRuntime.AppDomainAppPathInternal;  

        if (adPath == null ||  

            StringUtil.EqualsIgnoreCase(wrPath, adPath)) {   

            HttpRuntime.ProcessRequestNoDemand(wr);  

            return 0;  

        }  

        else {  

            // need to restart app domain  

            HttpRuntime.ShutdownAppDomain(ApplicationShutdownReason.PhysicalApplicationPathChanged,  

                                            SR.GetString(SR.Hosting_Phys_Path_Changed,  

                                                                            adPath,  

                                                                            wrPath));  

            return 1;  

        }  

    }  

    catch(Exception e) {  

        try {  

            WebBaseEvent.RaiseRuntimeError(e, this);  

        } catch {}  

        // Have we called HSE_REQ_DONE_WITH_SESSION?  If so, don't re-throw.  

        if (wr != null && wr.Ecb == IntPtr.Zero) {  

            if (pHttpCompletion != IntPtr.Zero) {  

                UnsafeNativeMethods.SetDoneWithSessionCalled(pHttpCompletion);  

            }  

            // if this is a thread abort exception, cancel the abort  

            if (e is ThreadAbortException) {  

                Thread.ResetAbort();  

            }  

            // IMPORTANT: if this thread is being aborted because of an AppDomain.Unload,  

            // the CLR will still throw an AppDomainUnloadedException. The native caller  

            // must special case COR_E_APPDOMAINUNLOADED(0x80131014) and not  

            // call HSE_REQ_DONE_WITH_SESSION more than once.  

            return 0;  

        }   

        // re-throw if we have not called HSE_REQ_DONE_WITH_SESSION  

        throw;
    }
}

以上是小编为您精心准备的的内容，在的博客、问答、公众号、人物、课程等栏目也有的相关内容，欢迎继续使用右上角搜索按钮进行搜索接口
， 方法
， if
IntPtr
springmvc注解详解、spring mvc.xml详解、spring mvc详解、spring mvc原理详解、spring4 mvc配置详解，以便于您获取更多的相关知识。