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POAn HTTP POST response is returning '\u0' characters between letters, how do I remove those or parse them in JavaScript?
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  1. POAn HTTP POST response is returning '\u0' characters between letters, how do I remove those or parse them in JavaScript?
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    copied!<p>The title pretty much says it all.</p> <p>I'm sending an HTTP POST to a .dll provided to me. The response text contains information that I need to parse and display to the user in a human readable way. I knew the response, but my JavaScript was informing me that the response wasn't matching, but when I viewed the response text, it was clearly exactly the same.</p> <p>Well, when I looked a little closer and view the response using Chrome's dev tools, it shows that there are '\u0' characters after every letter. Is it an end-of-character, or some kind of terminating mark for each character?</p> <p>My first guess was that it is a character encoding issue, but I'm not really sure.</p> <p>Could anyone enlighten me as to what's really going on? How do I replace those characters so I can check for a substring in the response?</p> <p>It's an AJAX POST request to a .dll served up by IIS 7, from a company called Magic Software.</p> <hr> <p>Here's the response:</p> <pre><code>HTTP/1.1 500 Internal Server Error Cache-Control: private Content-Type: text/html Server: Microsoft-IIS/7.5 X-AspNet-Version: 4.0.30319 X-Powered-By: ASP.NET Date: Thu, 21 Nov 2013 23:51:46 GMT Content-Length: 60 &lt;h1&gt;Max instance reached.&lt;/h1&gt; </code></pre> <hr> <p><strong>EDIT:</strong></p> <p>I used the following function to convert the UTF-16 string that I was getting into UTF-8. It works for my purpose. I cobbled it together from two different sources:</p> <p><a href="http://jonisalonen.com/2012/from-utf-16-to-utf-8-in-javascript/" rel="nofollow noreferrer">http://jonisalonen.com/2012/from-utf-16-to-utf-8-in-javascript/</a><br> <a href="https://stackoverflow.com/questions/14028148/convert-integer-array-to-string-at-javascript">Convert integer array to string at javascript</a> </p> <p>I should have much better knowledge of character encodings, and I haven't read too much into what this does together. I'm going to do some reading. :P</p> <p>Can someone look over this and tell me if it is an appropriate solution?</p> <pre><code> function UTF16toUTF8Str(str) { var utf8 = []; for (var i = 0; i &lt; str.length; i++) { var charcode = str.charCodeAt(i); if (charcode &lt; 0x80) utf8.push(charcode); else if (charcode &lt; 0x800) { utf8.push(0xc0 | (charcode &gt;&gt; 6), 0x80 | (charcode &amp; 0x3f)); } else if (charcode &lt; 0xd800 || charcode &gt;= 0xe000) { utf8.push(0xe0 | (charcode &gt;&gt; 12), 0x80 | ((charcode &gt;&gt; 6) &amp; 0x3f), 0x80 | (charcode &amp; 0x3f)); } // surrogate pair else { i++; // UTF-16 encodes 0x10000-0x10FFFF by // subtracting 0x10000 and splitting the // 20 bits of 0x0-0xFFFFF into two halves charcode = 0x10000 + (((charcode &amp; 0x3ff) &lt;&lt; 10) | (str.charCodeAt(i) &amp; 0x3ff)) utf8.push(0xf0 | (charcode &gt;&gt; 18), 0x80 | ((charcode &gt;&gt; 12) &amp; 0x3f), 0x80 | ((charcode &gt;&gt; 6) &amp; 0x3f), 0x80 | (charcode &amp; 0x3f)); } } var i, str = ''; for (i = 0; i &lt; utf8.length; i++) { if (utf8[i] !== 0) str += '%' + ('0' + utf8[i].toString(16)).slice(-2); // only add non-null characters to the string } str = decodeURIComponent(str); return str; } </code></pre> <hr> <p><strong>EDIT</strong></p> <p>Here is the response from a HAR file that I got from Chrome's dev tools:</p> <pre><code> "response": { "status": 500, "statusText": "Internal Server Error", "httpVersion": "HTTP/1.1", "headers": [ { "name": "Date", "value": "Fri, 22 Nov 2013 03:35:59 GMT" }, { "name": "Cache-Control", "value": "private" }, { "name": "Server", "value": "Microsoft-IIS/7.5" }, { "name": "X-AspNet-Version", "value": "4.0.30319" }, { "name": "X-Powered-By", "value": "ASP.NET" }, { "name": "Content-Length", "value": "60" }, { "name": "Content-Type", "value": "text/html" } ], "cookies": [], "content": { "size": 60, "mimeType": "text/html", "compression": 0, "text": "&lt;\u0000h\u00001\u0000&gt;\u0000M\u0000a\u0000x\u0000 \u0000i\u0000n\u0000s\u0000t\u0000a\u0000n\u0000c\u0000e\u0000 \u0000r\u0000e\u0000a\u0000c\u0000h\u0000e\u0000d\u0000.\u0000&lt;\u0000/\u0000h\u00001\u0000&gt;\u0000" }, "redirectURL": "", "headersSize": 223, "bodySize": 60 }, "cache": {}, "timings": { "blocked": 0, "dns": -1, "connect": -1, "send": 0, "wait": 475.0000000349246, "receive": 1.500034297350794, "ssl": -1 }, "connection": "21740", "pageref": "page_127" } ] } } </code></pre>
 

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