我有一个随机崩溃的Winform应用程序。该应用程序使用HtmlAgility的WebClient来解析html页面并从Web服务器下载图像。我尝试使用Try-Catch，但应用程序没有提供其他异常，它可以告诉我导致崩溃的原因，除了＆＃34; 500内部服务器错误＆＃34;。这是一些信息。任何人都可以帮我找到问题吗？
谢谢，
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\ReImageProcess\bin\Debug\ReImageApp.exe', Symbols loaded.
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Windows.Forms\v4.0_4.0.0.0__b77a5c561934e089\System.Windows.Forms.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.Debugger.Runtime\10.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.Debugger.Runtime.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
The thread '<No Name>' (0x27d0) has exited with code 0 (0x0).
The thread '<No Name>' (0x2148) has exited with code 0 (0x0).
The thread '<No Name>' (0x26e4) has exited with code 0 (0x0).
The thread '<No Name>' (0x2998) has exited with code 0 (0x0).
The thread '<No Name>' (0x1484) has exited with code 0 (0x0).
The thread '<No Name>' (0x239c) has exited with code 0 (0x0).
'ReImageApp.exe' (Managed (v4.0.30319)): Loaded 'C:\ReImageProcess\bin\Debug\HtmlAgilityPack.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x10e0) has exited with code 0 (0x0).
The thread '<No Name>' (0x2acc) has exited with code 0 (0x0).
The thread '<No Name>' (0x2904) has exited with code 0 (0x0).
The thread '<No Name>' (0x230c) has exited with code 0 (0x0).
The thread '<No Name>' (0xecc) has exited with code 0 (0x0).
The thread '<No Name>' (0x2adc) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x1f18) has exited with code 0 (0x0).
The thread '<No Name>' (0x24e4) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x205c) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x26c0) has exited with code 0 (0x0).
The thread '<No Name>' (0x2700) has exited with code 0 (0x0).
The thread '<No Name>' (0x1fc0) has exited with code 0 (0x0).
The thread '<No Name>' (0x2534) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2168) has exited with code 0 (0x0).
The thread '<No Name>' (0x2bd0) has exited with code 0 (0x0).
The thread '<No Name>' (0x2754) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x22e0) has exited with code 0 (0x0).
The thread '<No Name>' (0x2a50) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2bdc) has exited with code 0 (0x0).
The thread '<No Name>' (0x1c14) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x23d0) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x1174) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x11f4) has exited with code 0 (0x0).
The thread '<No Name>' (0x1ab8) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2a38) has exited with code 0 (0x0).
The thread '<No Name>' (0x2674) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x16e8) has exited with code 0 (0x0).
The thread '<No Name>' (0x2710) has exited with code 0 (0x0).
The thread '<No Name>' (0x22f0) has exited with code 0 (0x0).
The thread '<No Name>' (0xd58) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0xf34) has exited with code 0 (0x0).
The thread '<No Name>' (0x1e80) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2be4) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x1178) has exited with code 0 (0x0).
The thread '<No Name>' (0x1724) has exited with code 0 (0x0).
The thread '<No Name>' (0x2370) has exited with code 0 (0x0).
The thread '<No Name>' (0x2b90) has exited with code 0 (0x0).
The thread '<No Name>' (0x2434) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2b4c) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x26d8) has exited with code 0 (0x0).
The thread '<No Name>' (0xb2c) has exited with code 0 (0x0).
The thread '<No Name>' (0x1428) has exited with code 0 (0x0).
The thread '<No Name>' (0x1138) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x1b0) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2228) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x22c4) has exited with code 0 (0x0).
The thread '<No Name>' (0x1670) has exited with code 0 (0x0).
The thread '<No Name>' (0x166c) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2828) has exited with code 0 (0x0).
The thread '<No Name>' (0x28c0) has exited with code 0 (0x0).
The thread '<No Name>' (0x1160) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x1d14) has exited with code 0 (0x0).
The thread '<No Name>' (0x12b8) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x1b48) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2274) has exited with code 0 (0x0).
The thread '<No Name>' (0x1ca0) has exited with code 0 (0x0).
The thread '<No Name>' (0x904) has exited with code 0 (0x0).
The thread '<No Name>' (0x16f0) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2928) has exited with code 0 (0x0).
The thread '<No Name>' (0x4b8) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x261c) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x1f20) has exited with code 0 (0x0).
The thread '<No Name>' (0x2a14) has exited with code 0 (0x0).
The thread '<No Name>' (0x1ecc) has exited with code 0 (0x0).
The thread '<No Name>' (0x2814) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x27a0) has exited with code 0 (0x0).
The thread '<No Name>' (0x181c) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2a30) has exited with code 0 (0x0).
The thread '<No Name>' (0x2a18) has exited with code 0 (0x0).
The thread '<No Name>' (0x26c4) has exited with code 0 (0x0).
The thread '<No Name>' (0x11e0) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x247c) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2960) has exited with code 0 (0x0).
The thread '<No Name>' (0x262c) has exited with code 0 (0x0).
The thread '<No Name>' (0x114c) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2a80) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x254c) has exited with code 0 (0x0).
The thread '<No Name>' (0x1898) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
The thread '<No Name>' (0x2a54) has exited with code 0 (0x0).
The thread '<No Name>' (0x2a78) has exited with code 0 (0x0).
The thread '<No Name>' (0x2bc0) has exited with code 0 (0x0).
The thread '<No Name>' (0x2690) has exited with code 0 (0x0).
The thread '<No Name>' (0x201c) has exited with code 0 (0x0).
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in System.dll
A first chance exception of type 'System.IO.DirectoryNotFoundException' occurred in mscorlib.dll
The program '[10296] ReImageApp.exe: Managed (v4.0.30319)' has exited with code 0 (0x0).
更新
这是主要的lib -
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Threading;
using System.Configuration;
using System.ComponentModel;
using System.Text.RegularExpressions;
using HtmlAgilityPack;
using System.Drawing;
using ImageManipulation;
using System.Drawing.Imaging;
namespace ReImageApp
{
class DownLoadImages
{
TextWriter tw2;
object objLocker = new object();
Dictionary<string, string> dc = new Dictionary<string, string>();
private Queue<string> _downloadImageUrls = new Queue<string>();
private Queue<string> _loggerQueue = new Queue<string>();
public DownLoadImages()
{
}
public DownLoadImages(TextWriter tw)
{
tw2 = tw;
}
public void AddImage2Queue(string url, string path)
{
_downloadImageUrls.Enqueue(url);
dc.Add(url, path);
}
public void RunHtmlAgilityPackThread(string url)
{
try
{
Thread.Sleep(Convert.ToInt16(ConfigurationManager.GetAppSetting("PauseTime")) * 1000);
WebClient linkclient = new WebClient();
linkclient.DownloadDataCompleted += DownloadDataCompleted;
linkclient.DownloadDataAsync(new Uri(url), url);
}
catch (Exception ex)
{
_loggerQueue.Enqueue("Error in RunHtmlAgilityPackThread for url -- " + url + " " + (ex.InnerException == null? "" : ex.InnerException.Message));
}
}
private void DownloadDataCompleted(object sender,
DownloadDataCompletedEventArgs e)
{
var url = (string)e.UserState;
try
{
byte[] dbytes = e.Result;
string responseStr = System.Text.Encoding.ASCII.GetString(dbytes);
HtmlAgilityPack.HtmlDocument document = new HtmlAgilityPack.HtmlDocument();
document.LoadHtml(responseStr);
if (document.DocumentNode != null)
{
IList<string> ilImages = (document.DocumentNode.Descendants("img").Select(x => x.Attributes["src"].Value).Distinct().ToList());
if (ilImages.Count == 0)
{
_loggerQueue.Enqueue("Warning (contains not image) in RunHtmlAgilityPackThread-- " + url);
return;
}
GetImageUrls(ilImages, url);
}
else
{
_loggerQueue.Enqueue("Warning (No Html doc node) in RunHtmlAgilityPackThread -- " + url);
return;
}
}
catch (WebException wx)
{
_loggerQueue.Enqueue("Error in RunHtmlAgilityPackThread -- " + (wx.InnerException == null ? "" : wx.InnerException.Message) + " url --" + url);
}
catch (Exception ex)
{
_loggerQueue.Enqueue("Error in RunHtmlAgilityPackThread -- " + (ex.InnerException == null ? "" : ex.InnerException.Message) + " url --" + url);
}
}
private void GetImageUrls(IList<string> imgs, string url){
string url1, path;
try
{
for (int i = 0; i < imgs.Count; i++)
{
url1 = imgs[i].Replace("&", "&");
if (url1.ToLower().Contains("image1") || url1.ToLower().Contains("image2"))
{
lock (objLocker)
{
path = GetPath(url1, url);
if (url1 != null)
{
_downloadImageUrls.Enqueue(url1);
if (path != null)
dc.Add(url1, path);
}
}
DownloadFile();
}
}
}
catch (Exception ex)
{
_loggerQueue.Enqueue("Error in GetImageUrls -- " + (ex.InnerException == null ? "" : ex.InnerException.Message));
}
}
public void DownloadFile()
{
if (_downloadImageUrls.Any())
{
try
{
WebClient imageclient = new WebClient();
imageclient.DownloadFileCompleted += client_DownloadFileCompleted;
var url = _downloadImageUrls.Dequeue();
string FileName = dc[url];
CreateDirectory(Path.GetDirectoryName(FileName));
imageclient.DownloadFileAsync(new Uri(url), FileName, FileName + " " + url);
}
catch (Exception ex)
{
_loggerQueue.Enqueue("Error in DownloadFile -- " + (ex.InnerException == null ? "" : ex.InnerException.Message));
}
return;
}
// End of the download
return;
}
private void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
{
string filenameurl = string.Empty;
try
{
filenameurl = (string)e.UserState;
_loggerQueue.Enqueue(filenameurl);
if (e.Error != null)
{
_loggerQueue.Enqueue("Error in client_DownloadFileCompleted -- " + (e.Error.InnerException == null ? "" : e.Error.InnerException.Message));
}
if (e.Cancelled)
{
// handle cancelled scenario
}
}
catch (Exception ex)
{
}
try
{
while(_loggerQueue.Count>0)
tw2.WriteLine(_loggerQueue.Dequeue());
DownloadFile();
}
catch (Exception ex)
{
_loggerQueue.Enqueue("Error in tw2.WriteLine -- " + (ex.InnerException == null? "" : ex.InnerException.Message));
}
//mre.Set();
}
private string GetPath(string url, string origUrl)
{
string strDestRoot = (string)ConfigurationManager.GetAppSetting("DestRoot");
StringBuilder sb = new StringBuilder(strDestRoot);
StringBuilder sbFile = new StringBuilder();
string strTableOrChart;
string strConcept;
string strSTCode;
string strCYCode;
string strGridCount;
string strMSCode;
try
{
string[] strParam0 = origUrl.Replace("&", "&").Replace(""", "").Split(new string[] { "?", "_Type=", "&Parameter1=", "&Parameter2=", "&" }, StringSplitOptions.RemoveEmptyEntries);
string[] strParam = url.Replace("&", "&").Replace(""", "").Split(new string[] { "?", "_Type=", "&Parameter1=", "&Parameter2=", "&" }, StringSplitOptions.RemoveEmptyEntries);
strTableOrChart = strParam[1];
sb.Append(@"\");
sb.Append(strTableOrChart);
strConcept = strParam0[2];
sb.Append(@"\");
sb.Append(strConcept);
CreateDirectory(sb.ToString());
sb.Append(@"\");
sb.Append(strConcept);
strSTCode = strParam[4];
if (url.Contains("ImageCYTables?Table_Type=") || url.Contains("CYImage?Chart_Type="))
{
strCYCode = strParam[5].Replace("Selected_CYCde=", "");
sb.Append(strCYCode);
}
else if (url.Contains("MSImage?Chart_Type=") || url.Contains("ImageMSTable?Table_Type="))
{
strMSCode = strParam[5].Replace("Selected_MSCde=", "");
sb.Append(strMSCode);
}
else if (url.Contains("ImageTableMGrids?Table_Type="))
{
if (strParam.Length > 5)
{
strGridCount = strParam[5].Replace("Parameter3=", "_");
sb.Append(strGridCount);
}
else
sb.Append(strSTCode);
}
else if (url.Contains("ImageCYTable_MGrids?Table_Type="))
{
strCYCode = strParam[5].Replace("Selected_CYCde=", "");
strGridCount = strParam[6].Replace("Parameter3=", "_");
sb.Append(strCYCode);
sb.Append(strGridCount);
}
else
sb.Append(strSTCode);
sb.Append(".png");
return sb.ToString().Replace("\"", "");
}
catch (Exception ex)
{
//lock (tw2)
{
_loggerQueue.Enqueue("Error in getpath -- " + (ex.InnerException == null ? "" : ex.InnerException.Message));
}
return null;
}
}
private bool CreateDirectory(string path)
{
lock (objLocker)
{
if (!Directory.Exists(path))
{
// Try to create the directory.
DirectoryInfo di = Directory.CreateDirectory(path);
return false;
}
else
return true;
}
}
}
}
使用lib的部分是 -
var doImages = GetDownLoadImagesThread();
foreach (var aURL in iAllUrls.Distinct())
{
doImages.Value.RunHtmlAgilityPackThread(aURL.Replace("&", "&").Replace("\"",""));
}
private ThreadLocal<DownLoadImages> GetDownLoadImagesThread()
{
TextWriter tw2 = new StreamWriter(CreateURLFile(2));
tw2 = TextWriter.Synchronized(tw2);
return new ThreadLocal<DownLoadImages>(() => new DownLoadImages(tw2));
}
答案 0 :(得分：2)
“500内部服务器错误”是服务器端错误。您的服务器上发生错误，并将结果500发送到您的客户端。这会在WinForms客户端中导致异常。您的WinForms客户端没有编码足够的异常处理。改进客户端上的异常处理以优雅地处理异常。查看您的服务器以确定500错误发生的原因。