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POC# WCF -- Custom Error on Authorization Fail via a custom AuthorizationManager
 

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  1. POC# WCF -- Custom Error on Authorization Fail via a custom AuthorizationManager
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    <p>I am currenlty working on implementing a custom WCF OpenAuth AuthenticationManager and I have successfully done so. My problem now however, is the response pages when the user fails to authenticate. I would like for the user to receive a JSON-formatted message with a 401 (Unauthorized) response-status code. However, I get a generic, 400-error response as such:</p> <pre><code>HTTP/1.1 400 Bad Request Server: ASP.NET Development Server/10.0.0.0 Date: Mon, 20 Jun 2011 17:29:31 GMT X-AspNet-Version: 4.0.30319 Content-Length: 1765 Cache-Control: private Content-Type: text/html Connection: Close &lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head&gt; &lt;title&gt;Request Error&lt;/title&gt; &lt;style&gt;BODY { color: #000000; background-color: white; font-family: Verdana; margin-left: 0px; margin-top: 0px; } #content { margin-left: 30px; font-size: .70em; padding-bottom: 2em; } A:link { color: #336699; font-weight: bold; text-decoration: underline; } A:visited { color: #6699cc; font-weight: bold; text-decoration: underline; } A:active { color: #336699; font-weight: bold; text-decoration: underline; } .heading1 { background-color: #003366; border-bottom: #336699 6px solid; color: #ffffff; font-family: Tahoma; font-size: 26px; font-weight: normal;margin: 0em 0em 10px -20px; padding-bottom: 8px; padding-left: 30px;padding-top: 16px;} pre { font-size:small; background-color: #e5e5cc; padding: 5px; font-family: Courier New; margin-top: 0px; border: 1px #f0f0e0 solid; white-space: pre-wrap; white-space: -pre-wrap; word-wrap: break-word; } table { border-collapse: collapse; border-spacing: 0px; font-family: Verdana;} table th { border-right: 2px white solid; border-bottom: 2px white solid; font-weight: bold; background-color: #cecf9c;} table td { border-right: 2px white solid; border-bottom: 2px white solid; background-color: #e5e5cc;}&lt;/style&gt; &lt;/head&gt; &lt;body&gt; &lt;div id="content"&gt; &lt;p class="heading1"&gt;Request Error&lt;/p&gt; &lt;p xmlns=""&gt;The server encountered an error processing the request. Please see the &lt;a rel="help-page" href="http://localhost:2947/user/help"&gt;service help page&lt;/a&gt; for constructing valid requests to the service.&lt;/p&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>I'd really like to get something more like the following:</p> <pre><code>HTTP/1.1 200 OK Server: ASP.NET Development Server/10.0.0.0 Date: Mon, 20 Jun 2011 15:35:12 GMT X-AspNet-Version: 4.0.30319 Content-Length: 265 Cache-Control: private Content-Type: application/json; charset=utf-8 Connection: Close {"result":{"error":"Unable to authenticate using provided OAuth credentials"}} </code></pre> <p>I am implementing my auth-service by extending the ServiceAuthorizationManager and creating a custom WebServiceHostFactory that injects my auth-manager. </p> <p>Any help is greatly appreciated!</p>
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      1. POC# WCF -- Custom Error on Authorization Fail via a custom AuthorizationManager
      1. USAndrew Church
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    1. COHave you thought about using an http module to intercept the request and do your OAuth validation? If done this way, when the validation fails you could customize the response format.
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      1. USAndrew Church
    2. CO@Andrew Church -- I have not looked into this, but I have read that it is best practice to do your site-wide authorization in the AuthorizationManager. I have however been able to change the response status code using the call ` WebOperationContext.Current.OutgoingResponse.StatusCode = HttpStatusCode.Unauthorized;`
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    3. CORight, just not sure if AuthorizationManager would even get called were you to implement cache rules (AspNet or IIS), but I'm pretty sure a module would.
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