如何解释错误“客户端发现响应内容类型为 'text/html'.. [英] How can the error 'Client found response content type of 'text/html'.. be interpreted
问题描述
我正在使用 C# 并通过自动生成的 C# 代理对象连接到 WebService.我调用的方法可能会长时间运行，有时会超时.我收到不同的错误，有时我收到 System.Net.WebException 或 System.Web.Services.Protocols.SoapException.这些异常具有我可以查询的属性，以查找特定类型的错误，从中我可以向用户显示一个人性化的版本.
I'm using C# and connecting to a WebService via an auto-generated C# proxy object. The method I'm calling can be long running, and sometimes times out. I get different errors back, sometimes I get a System.Net.WebException or a System.Web.Services.Protocols.SoapException. These exceptions have properties I can interrogate to find the specific type of error from which I can display a human-friendly version of to the user.
但有时我只会收到一个 InvalidOperationException，它有以下消息.有没有什么方法可以解释这是什么，而不用挖掘字符串中我认识的东西，这感觉很脏，并且与国际化无关，错误消息可能会以不同的语言返回.
But sometimes I just get an InvalidOperationException, and it has the following Message. Is there any way I can interpret what this is without digging through the string for things I recognize, that feels very dirty, and isn't internationalization agnostic, the error message might come back in a different language.
Client found response content type of 'text/html; charset=utf-8', but expected 'text/xml'.
The request failed with the error message:
--
<html>
<head>
<title>Request timed out.</title>
<style>
body {font-family:"Verdana";font-weight:normal;font-size: .7em;color:black;}
p {font-family:"Verdana";font-weight:normal;color:black;margin-top: -5px}
b {font-family:"Verdana";font-weight:bold;color:black;margin-top: -5px}
H1 { font-family:"Verdana";font-weight:normal;font-size:18pt;color:red }
H2 { font-family:"Verdana";font-weight:normal;font-size:14pt;color:maroon }
pre {font-family:"Lucida Console";font-size: .9em}
.marker {font-weight: bold; color: black;text-decoration: none;}
.version {color: gray;}
.error {margin-bottom: 10px;}
.expandable { text-decoration:underline; font-weight:bold; color:navy; cursor:hand; }
</style>
</head>
<body bgcolor="white">
<span><H1>Server Error in '/PerformanceManager' Application.<hr width=100% size=1 color=silver></H1>
<h2> <i>Request timed out.</i> </h2></span>
<font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">
<b> Description: </b>An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
<br><br>
<b> Exception Details: </b>System.Web.HttpException: Request timed out.<br><br>
<b>Source Error:</b> <br><br>
<table width=100% bgcolor="#ffffcc">
<tr>
<td>
<code>
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.</code>
</td>
</tr>
</table>
<br>
<b>Stack Trace:</b> <br><br>
<table width=100% bgcolor="#ffffcc">
<tr>
<td>
<code><pre>
[HttpException (0x80004005): Request timed out.]
</pre></code>
</td>
</tr>
</table>
<br>
<hr width=100% size=1 color=silver>
<b>Version Information:</b> Microsoft .NET Framework Version:2.0.50727.312; ASP.NET Version:2.0.50727.833
</font>
</body>
</html>
<!--
[HttpException]: Request timed out.
-->
--.
我在网络服务器上尝试捕获该方法.我已经调试了它，并且 web-server 方法毫无例外地返回(大约一分钟后).我还在 Web 服务中添加了一个未处理的异常处理程序，并且没有命中一个断点.一旦 Web 服务返回，我就会在客户端中收到此错误，而不是我预期的结果.
I have a try-catch around the method on the web-server. I have debugged it, and the web-server method returns (after a minute or so) without any exception. I also added an unhandled exception handler in the web service and a breakpoint there wasn't hit. As soon as the web-service returns, I get this error in the client instead of the result I expected.
推荐答案
发生这种情况是因为您的 Web 服务中存在未处理的异常，并且 .NET 运行时吐出其 HTML 黄屏死机服务器错误/异常转储页面，而不是 XML.
This is happening because there is an unhandled exception in your Web service, and the .NET runtime is spitting out its HTML yellow screen of death server error/exception dump page, instead of XML.
由于您的 Web 服务的使用者期望得到 text/xml 标头，而得到的是 text/html，因此它会引发该错误.
Since the consumer of your Web service was expecting a text/xml header and instead got text/html, it throws that error.
您应该解决超时的原因(也许是冗长的 SQL 查询?).
You should address the cause of your timeouts (perhaps a lengthy SQL query?).
另外，在 Jeff Atwood 的博客上查看这篇博文，其中解释了实施全局未处理异常处理程序和使用 SOAP 异常.
Also, checkout this blog post on Jeff Atwood's blog that explains implementing a global unhandled exception handler and using SOAP exceptions.
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