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POVS2005 UTF-8 generic HTTP handler: issues with certain chars in query string (e.g. þ æ)
 

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    <p>I am developing a generic HTTP handler in VS2005 and testing it in Debug Mode. It works well except when the query string contains higher-bit characters, e.g. Latin Small Letter Thorn /u00FE <strong>þ</strong> and Latin Small Letter Ae /u00E6 <strong>æ</strong>.</p> <p>IE8 on my machine is set to send UTF-8 URLs. I am typing the following into the IE8 address bar when debugging the code:</p> <pre> http://app/myHandler.ashx?term=foo // everything works http://app/myHandler.ashx?term=þorn // does not work -- query from database fails </pre> <p>The database is SQLite and it is using UTF-8 encoding and it works fine. The queries that use these special characters work fine when issued directly against SQLite using other GUI tools or using the System.Data.SQLite GUI add-ins to Visual Studio.</p> <p><strong>Am I decoding the values from the Query String correctly? Does GetString() not decode the bytes?</strong></p> <pre> public StandardRequest(HttpContext context) { UTF8Encoding utf8 = new UTF8Encoding(); if (context.Request.QueryString["term"] != null) { byte[] w = utf8.GetBytes(context.Request.QueryString["term"]); word = utf8.GetString(w); ... </pre> <p>In the HTTP handler, ContentEncoding is set to UTF-8:</p> <pre> context.Response.ContentEncoding = System.Text.Encoding.UTF8;</pre> <p>and in the debugger's local's window, Request.ContentEncoding is also UTF-8.</p> <p>But when I examine the query string value in the locals window, the <strong>term</strong> value from the query string <em>'þorn'</em> is being displayed as <em>'[]orn'</em> and that is how it is displayed in the sql statement that I'm sending through to the database. It's as if the character hasn't been recognized.</p> <p>Am I doing something wrong in the way the value is being grabbed from the query string and converted to a string?</p>
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