【紧急求助】HTTPWebRequest引发进程Crash的问题

[Just4life]

代码如下：

public string POST(string url, byte[] data, string SoapAction, string userAgent)
        {
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            string errmsg = null;
            string str_stream = null;
            Stream response_stream = null;
            Stream write_steam = null;

            try
            {
                //判断URL是否为空
                if (string.IsNullOrEmpty(url))
                {
                    errmsg = "Http POST URL is null!";
                    log.WriteLog(errmsg);
                    LastErrorCode = HttpStatusCode.BadRequest;
                    LastStatusDescription = errmsg;
                    throw new ArgumentNullException(errmsg);
                }                

                //判断是否为合法URI
                try
                {
                    Uri uri = new Uri(url);
                }
                catch (Exception)
                {
                    errmsg = "Http POST URL isn't a vaild URI!";
                    log.WriteLog(errmsg);
                    LastErrorCode = HttpStatusCode.BadRequest;
                    LastStatusDescription = errmsg;
                    throw new ArgumentException(errmsg);
                }                

                //判断请求数据是否为空
                if (data == null || data.Length <= 0)
                {
                    errmsg = "Http POST data is null!";
                    log.WriteLog(errmsg);
                    LastErrorCode = HttpStatusCode.BadRequest;
                    LastStatusDescription = errmsg;
                    throw new ArgumentNullException(errmsg);
                }
                
                //释放系统资源,对系统资源进行回收
                System.GC.Collect();
                //设置系统最大http连接数
                System.Net.ServicePointManager.DefaultConnectionLimit = 200;
                System.Net.ServicePointManager.SetTcpKeepAlive(true, 2000, 2000);

                //设置请求参数
                request = WebRequest.Create(url) as HttpWebRequest;
                if (request == null)
                {
                    errmsg = "Http Create Post WebRequest failed!";
                    log.WriteLog(errmsg);
                    LastErrorCode = HttpStatusCode.BadRequest;
                    LastStatusDescription = errmsg;
                    throw new System.Net.WebException(errmsg);
                }

                request.Method = "POST";
                request.ContentType = "text/xml; charset=\"utf-8\"";
                request.UserAgent = DefaultUserAgent;                
                request.Timeout = i_defaule_timeout;
                request.KeepAlive = false;                       

                //设置代理
                if (!string.IsNullOrEmpty(userAgent))
                {
                    request.UserAgent = userAgent;
                }                

                //表明传输的是SOAP
                if (!string.IsNullOrEmpty(SoapAction))
                {
                    request.Headers.Add("SOAPACTION", SoapAction);                    
                }
                //设置传输内容长度
                request.ContentLength = data.Length;
                
                //获取写入数据对象，Stream类型                
                write_steam = request.GetRequestStream();
                if (write_steam == null)
                {
                    errmsg = "Http POST(WebResponse) Failed!(GetRequestStream Error)";
                    log.WriteLog(errmsg);
                    LastErrorCode = HttpStatusCode.BadRequest;
                    LastStatusDescription = errmsg;
                    throw new System.Net.WebException(errmsg);
                }
                
                //理解写入数据
                write_steam.Write(data, 0, data.Length);                
                //立即推送数据
                write_steam.Flush();                
                
                //获取请求返回
                using (WebResponse webresponse = request.GetResponse())
                {
                    try
                    {                        
                        if (webresponse == null)
                        {
                            errmsg = "Http POST(WebResponse) Failed!(Get Response Error)";
                            log.WriteLog(errmsg);
                            LastErrorCode = HttpStatusCode.BadRequest;
                            LastStatusDescription = errmsg;
                            throw new System.Net.WebException(errmsg);
                        }
                    }
                    catch (Exception ex)
                    {                        
                        errmsg = "Http POST(WebResponse) Failed(Get Response Error)! Exception: " + ex.Message;
                        log.WriteLog(errmsg);
                        LastErrorCode = HttpStatusCode.BadRequest;
                        LastStatusDescription = errmsg;
                        throw new System.Net.WebException(errmsg);
                    }
                                        
                    if (webresponse is HttpWebResponse)
                    {
                        response = webresponse as HttpWebResponse;
                        if (response == null || response.StatusCode != HttpStatusCode.OK)
                        {
                            errmsg = "Http POST(HttpWebResponse) Failed!(" + response.StatusCode + ")";
                            log.WriteLog(errmsg);
                            LastErrorCode = response.StatusCode;
                            LastStatusDescription = response.StatusDescription;
                            throw new System.Net.WebException(errmsg);
                        }                        

                        //获取请求返回内容
                        response_stream = response.GetResponseStream() as Stream;
                        if (response_stream == null)
                        {
                            errmsg = "Http POST(Result) Failed!(" + url + ")";
                            log.WriteLog(errmsg);
                            LastErrorCode = HttpStatusCode.BadRequest;
                            LastStatusDescription = errmsg;
                            throw new ArgumentException(errmsg);
                        }                        

                        //读取数据
                        str_stream = StreamToString(response_stream);
                        if (str_stream == null)
                        {
                            errmsg = "Http POST(Result) Failed!(Get Service String Failed)";
                            log.WriteLog(errmsg);
                            LastErrorCode = HttpStatusCode.BadRequest;
                            LastStatusDescription = errmsg;
                            throw new ArgumentException(errmsg);
                        }                        
                    }
                    else
                    {
                        errmsg = "Http POST(WebResponse) Failed!(Response isn't HttpWebResponse)";
                        log.WriteLog(errmsg);
                        LastErrorCode = HttpStatusCode.BadRequest;
                        LastStatusDescription = errmsg;
                        throw new System.Net.WebException(errmsg);
                    }
                }                                

                //设置状态
                LastErrorCode = HttpStatusCode.OK;
                LastStatusDescription = "OK";
            }
            catch (Exception ex)
            {                
                log.WriteLog("Http POST Execption!(" + ex.Message + ")(" + url + ")");
                LastErrorCode = HttpStatusCode.BadRequest;
                LastStatusDescription = "Http POST Execption!(" + ex.Message + ")(" + url + ")";

                str_stream = null;
            }
            finally
            {                
                if (write_steam != null)
                {
                    //关闭读取操作                    
                    write_steam.Dispose();
                    write_steam.Close();
                }

                if (response_stream != null)
                {
                    //关闭读取操作                    
                    response_stream.Dispose();
                    response_stream.Close();
                }

                //关闭连接
                if (response != null)
                {                                       
                    response.Close();
                    response = null;
                }

                if (request != null)
                {                   
                    request.Abort();
                    request = null;
                }

            }

            return str_stream;
        }

WebResponse webresponse = request.GetResponse()长时间运行后，这句会导致进程crash，各位大侠帮忙看看啊

[xdashewan]

检查外部调用有没捕捉System.Net.WebException异常，再检查finally块内会不会有异常

[Just4life]

引用 3 楼 xdashewan 的回复:

检查外部调用有没捕捉System.Net.WebException异常，再检查finally块内会不会有异常

WebResponse webresponse = request.GetResponse()明确是这一步导致crash了

[xdashewan]

request.GetResponse()也得放进try块里

[Just4life]

引用 1 楼 xdashewan 的回复:

request.GetResponse()也得放进try块里

放在里面也没有用，也抓不到catch

[Just4life]

抓了dump文件，是NTdll处报0xC000005错误

[Just4life]

没有人知道吗？

[娃都会打酱油了]

response_stream.Dispose(); response_stream.Close(); 你这些类似的报异常了，怎么会先Dispose了再Close，Dispose会调用Close，并销毁自身，这时候再调用肯定报异常