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POHTTP Response GZip Compression
 

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  1. POHTTP Response GZip Compression
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    <p>I have a Proxy which handles HTTP Requests. </p> <p>Now when I get a GZipped HTTP Response, I'm decompressing it like :</p> <pre><code>MemoryStream ms = new MemoryStream(); if (response.ContentLength &gt; 0) buffer = new Byte[response.ContentLength]; else buffer = new Byte[BUFFER_SIZE]; int bytesRead; while ((bytesRead = responseStream.Read(buffer, 0, buffer.Length)) &gt; 0) { ms.Write(buffer, 0, bytesRead); } string resp = ""; if (response.ContentEncoding == "gzip") resp = Utilities.GZip.Unzip(ms.ToArray()); else resp = Encoding.UTF8.GetString(ms.ToArray()); </code></pre> <p>Where Utilities.GZip.Unzip does:</p> <pre><code>using (var msi = new MemoryStream(bytes)) using (var mso = new MemoryStream()) { using (var gs = new GZipStream(msi, CompressionMode.Decompress)) { CopyTo(gs, mso); } return Encoding.UTF8.GetString(mso.ToArray()); } </code></pre> <p>So far everything's fine, I can read the HTML.</p> <p>Now I have to Write the Response back to the Client who requested it.</p> <p>Like this:</p> <pre><code>byte[] outByte; if (response.ContentEncoding == "gzip") outByte = Utilities.GZip.Zip(resp); else outByte = Encoding.UTF8.GetBytes(resp); outStream.Write(outByte, 0, outByte.Length); </code></pre> <p>Where Utilities.GZip.Zip does:</p> <pre><code>var bytes = Encoding.UTF8.GetBytes(str); using (var msi = new MemoryStream(bytes)) using (var mso = new MemoryStream()) { using (var gs = new GZipStream(mso, CompressionMode.Compress)) { CopyTo(msi, gs); } return mso.ToArray(); } </code></pre> <p>Now it's a really strange behaviour, the response byte-Array has a Length of 16990 (zipped), but my own zipped byte-Array has a Length of 19379.</p> <p>The client get's a response, but it's cutted off.</p> <p>Any suggestions?</p> <p><strong>EDIT:</strong></p> <p>For your information, as I send the original MemoryStream unchanged to the Client everythings fine!</p>
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    1. COMaybe .Net uses worse settings for gzip than the original sender. Is the response actually cut off?
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    2. COThe Response I get and Unzip to a String is actually fine. I tried also to compress it and decompress this one, but that's fine.
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