I’m writing a Web API service and trying to return a (400) Bad Request if my ModelState is invalid. I do not want a response body to be attached to this. It appears that IIS is hijacking my response and always returning a text/html content type with a lengthy, styled error page. This is a problem.
[HttpPost]
public void Link(LinkDeviceModel model)
{
if (ModelState.IsValid)
{
try
{
model.Save();
}
catch (Exception ex)
{
ErrorSignal.FromCurrentContext().Raise(ex);
throw new HttpResponseException(ex.Message, HttpStatusCode.InternalServerError);
}
}
else
{
throw new HttpResponseException(HttpStatusCode.BadRequest);
}
}
Here is my fiddler request:
POST http://localhost/myapp/service/link HTTP/1.1
Host: localhost
Content-Length: 112
Content-Type: application/json
Accept: application/json
{"DeviceUniqueId":"CC9C6FC0-7D06-11E1-8B0E-31564824019B", "UserName": "me@mycompany.com"," Pin": "111111"}
And my response erroneous, full of body, response:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>IIS 7.5 Detailed Error - 400.0 - Bad Request</title>
<style type="text/css">
<!--
body{margin:0;font-size:.7em;font-family:Verdana,Arial,Helvetica,sans-serif;background:#CBE1EF;}
code{margin:0;color:#006600;font-size:1.1em;font-weight:bold;}
.config_source code{font-size:.8em;color:#000000;}
pre{margin:0;font-size:1.4em;word-wrap:break-word;}
ul,ol{margin:10px 0 10px 40px;}
ul.first,ol.first{margin-top:5px;}
fieldset{padding:0 15px 10px 15px;}
.summary-container fieldset{padding-bottom:5px;margin-top:4px;}
legend.no-expand-all{padding:2px 15px 4px 10px;margin:0 0 0 -12px;}
legend{color:#333333;padding:4px 15px 4px 10px;margin:4px 0 8px -12px;_margin-top:0px;
border-top:1px solid #EDEDED;border-left:1px solid #EDEDED;border-right:1px solid #969696;
border-bottom:1px solid #969696;background:#E7ECF0;font-weight:bold;font-size:1em;}
a:link,a:visited{color:#007EFF;font-weight:bold;}
a:hover{text-decoration:none;}
h1{font-size:2.4em;margin:0;color:#FFF;}
h2{font-size:1.7em;margin:0;color:#CC0000;}
h3{font-size:1.4em;margin:10px 0 0 0;color:#CC0000;}
h4{font-size:1.2em;margin:10px 0 5px 0;
}#header{width:96%;margin:0 0 0 0;padding:6px 2% 6px 2%;font-family:"trebuchet MS",Verdana,sans-serif;
color:#FFF;background-color:#5C87B2;
}#content{margin:0 0 0 2%;position:relative;}
.summary-container,.content-container{background:#FFF;width:96%;margin-top:8px;padding:10px;position:relative;}
.config_source{background:#fff5c4;}
.content-container p{margin:0 0 10px 0;
}#details-left{width:35%;float:left;margin-right:2%;
}#details-right{width:63%;float:left;overflow:hidden;
}#server_version{width:96%;_height:1px;min-height:1px;margin:0 0 5px 0;padding:11px 2% 8px 2%;color:#FFFFFF;
background-color:#5A7FA5;border-bottom:1px solid #C1CFDD;border-top:1px solid #4A6C8E;font-weight:normal;
font-size:1em;color:#FFF;text-align:right;
}#server_version p{margin:5px 0;}
table{margin:4px 0 4px 0;width:100%;border:none;}
td,th{vertical-align:top;padding:3px 0;text-align:left;font-weight:bold;border:none;}
th{width:30%;text-align:right;padding-right:2%;font-weight:normal;}
thead th{background-color:#ebebeb;width:25%;
}#details-right th{width:20%;}
table tr.alt td,table tr.alt th{background-color:#ebebeb;}
.highlight-code{color:#CC0000;font-weight:bold;font-style:italic;}
.clear{clear:both;}
.preferred{padding:0 5px 2px 5px;font-weight:normal;background:#006633;color:#FFF;font-size:.8em;}
-->
</style>
</head>
<body>
<div id="header"><h1>Server Error in Application "DEFAULT WEB SITE/MYAPP"</h1></div>
<div id="server_version"><p>Internet Information Services 7.5</p></div>
<div id="content">
<div class="content-container">
<fieldset><legend>Error Summary</legend>
<h2>HTTP Error 400.0 - Bad Request</h2>
<h3>Bad Request</h3>
</fieldset>
</div>
<div class="content-container">
<fieldset><legend>Detailed Error Information</legend>
<div id="details-left">
<table border="0" cellpadding="0" cellspacing="0">
<tr class="alt"><th>Module</th><td>ManagedPipelineHandler</td></tr>
<tr><th>Notification</th><td>ExecuteRequestHandler</td></tr>
<tr class="alt"><th>Handler</th><td>System.Web.Http.WebHost.HttpControllerHandler</td></tr>
<tr><th>Error Code</th><td>0x00000000</td></tr>
</table>
</div>
<div id="details-right">
<table border="0" cellpadding="0" cellspacing="0">
<tr class="alt"><th>Requested URL</th><td>http://localhost:80/myapp/service/link</td></tr>
<tr><th>Physical Path</th><td>C:\workspace\myapp\service\link</td></tr>
<tr class="alt"><th>Logon Method</th><td>Anonymous</td></tr>
<tr><th>Logon User</th><td>Anonymous</td></tr>
</table>
<div class="clear"></div>
</div>
</fieldset>
</div>
<div class="content-container">
<fieldset><legend>Most likely causes:</legend>
<ul> <li></li> </ul>
</fieldset>
</div>
<div class="content-container">
<fieldset><legend>Things you can try:</legend>
<ul> <li>Create a tracing rule to track failed requests for this HTTP status code. For more information about creating a tracing rule for failed requests, click <a href="http://go.microsoft.com/fwlink/?LinkID=66439">here</a>. </li> </ul>
</fieldset>
</div>
<div class="content-container">
<fieldset><legend>Links and More Information</legend>
The request could not be understood by the server due to malformed syntax.
<p><a href="http://go.microsoft.com/fwlink/?LinkID=62293&IIS70Error=400,0,0x00000000,7601">View more information »</a></p>
<p>Microsoft Knowledge Base Articles:</p>
<ul><li></li></ul>
</fieldset>
</div>
</div>
</body>
</html>
I have tried to set TrySkipIisCustomErrors = True with great hope, but no luck. Any ideas? Appreciated. Thanks.
Try adding this to your web.config. I had a very similar problem which this solved.