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    <p>Here's a wrapped download class which supports gzip and checks encoding header and meta tags in order to decode it correctly.</p> <p>Instantiate the class, and call <code>GetPage()</code>.</p> <pre><code>public class HttpDownloader { private readonly string _referer; private readonly string _userAgent; public Encoding Encoding { get; set; } public WebHeaderCollection Headers { get; set; } public Uri Url { get; set; } public HttpDownloader(string url, string referer, string userAgent) { Encoding = Encoding.GetEncoding("ISO-8859-1"); Url = new Uri(url); // verify the uri _userAgent = userAgent; _referer = referer; } public string GetPage() { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url); if (!string.IsNullOrEmpty(_referer)) request.Referer = _referer; if (!string.IsNullOrEmpty(_userAgent)) request.UserAgent = _userAgent; request.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip,deflate"); using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) { Headers = response.Headers; Url = response.ResponseUri; return ProcessContent(response); } } private string ProcessContent(HttpWebResponse response) { SetEncodingFromHeader(response); Stream s = response.GetResponseStream(); if (response.ContentEncoding.ToLower().Contains("gzip")) s = new GZipStream(s, CompressionMode.Decompress); else if (response.ContentEncoding.ToLower().Contains("deflate")) s = new DeflateStream(s, CompressionMode.Decompress); MemoryStream memStream = new MemoryStream(); int bytesRead; byte[] buffer = new byte[0x1000]; for (bytesRead = s.Read(buffer, 0, buffer.Length); bytesRead &gt; 0; bytesRead = s.Read(buffer, 0, buffer.Length)) { memStream.Write(buffer, 0, bytesRead); } s.Close(); string html; memStream.Position = 0; using (StreamReader r = new StreamReader(memStream, Encoding)) { html = r.ReadToEnd().Trim(); html = CheckMetaCharSetAndReEncode(memStream, html); } return html; } private void SetEncodingFromHeader(HttpWebResponse response) { string charset = null; if (string.IsNullOrEmpty(response.CharacterSet)) { Match m = Regex.Match(response.ContentType, @";\s*charset\s*=\s*(?&lt;charset&gt;.*)", RegexOptions.IgnoreCase); if (m.Success) { charset = m.Groups["charset"].Value.Trim(new[] { '\'', '"' }); } } else { charset = response.CharacterSet; } if (!string.IsNullOrEmpty(charset)) { try { Encoding = Encoding.GetEncoding(charset); } catch (ArgumentException) { } } } private string CheckMetaCharSetAndReEncode(Stream memStream, string html) { Match m = new Regex(@"&lt;meta\s+.*?charset\s*=\s*""?(?&lt;charset&gt;[A-Za-z0-9_-]+)""?", RegexOptions.Singleline | RegexOptions.IgnoreCase).Match(html); if (m.Success) { string charset = m.Groups["charset"].Value.ToLower() ?? "iso-8859-1"; if ((charset == "unicode") || (charset == "utf-16")) { charset = "utf-8"; } try { Encoding metaEncoding = Encoding.GetEncoding(charset); if (Encoding != metaEncoding) { memStream.Position = 0L; StreamReader recodeReader = new StreamReader(memStream, metaEncoding); html = recodeReader.ReadToEnd().Trim(); recodeReader.Close(); } } catch (ArgumentException) { } } return html; } } </code></pre>
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    1. POCharacters in string changed after downloading HTML from the internet
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    1. USMikael Svenson
    1. USMikael Svenson
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    1. POCharacters in string changed after downloading HTML from the internet
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    1. COHey, that just works. Thanks.
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      1. USCallum Rogers
    2. COSomething I wrote last year for an azure project :) Glad it could be of use for you.
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      1. USMikael Svenson
    3. COThanks for sharing this Mikael. I've used it and I found a problem with the encoding detection. If headers contain `charset` it shouldn't check the meta tag since the precedence rules clearly states that in case of conflict header has the highest priority. http://goo.gl/5q0Yg
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      1. USDiadistis
 

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