public void DetectUnicodeEncodingTest_ANSI()
{
string file = Path.Combine(new FileInfo(Assembly.GetExecutingAssembly().Location).DirectoryName, "Resources\\ANSI.txt");
Encoding actual = EncodingUtility.DetectUnicodeEncoding(file);
Assert.IsNull(actual);
}
public void DetectUnicodeEncodingTest_UTF16_Big()
{
string file = Path.Combine(new FileInfo(Assembly.GetExecutingAssembly().Location).DirectoryName, "Resources\\UTF-16-Big.txt");
Encoding expected = new UnicodeEncoding(true, true);
Encoding actual = EncodingUtility.DetectUnicodeEncoding(file);
Assert.AreEqual(expected, actual);
}
public void DetectUnicodeEncodingTest_UTF32_Little()
{
string file = Path.Combine(new FileInfo(Assembly.GetExecutingAssembly().Location).DirectoryName, "Resources\\UTF-32-Little.txt");
Encoding expected = Encoding.UTF32;
Encoding actual = EncodingUtility.DetectUnicodeEncoding(file);
Assert.AreEqual(expected, actual);
}
/// <summary>
/// Gets the response content as a byte array.
/// </summary>
/// <param name="response"></param>
/// <param name="buffer"></param>
/// <param name="encoding"></param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException"><paramref name="buffer"/> is null.</exception>
/// <exception cref="System.NotSupportedException">Not supported character set.</exception>
public static string GetResponseString(this HttpWebResponse response, Encoding encoding, byte[] buffer)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (encoding == null)
{
encoding = HttpHelper.GetTextEncoding(response);
}
byte[] data = GetResponseContent(response, buffer);
if (encoding == null)
{
if ((encoding = EncodingUtility.DetectUnicodeEncoding(data)) == null)
{
string content = DefaultContentEncoding.GetString(data);
Match match = g_charsetRegex.Match(content);
if (match != null && match.Success)
{
switch (match.Groups[1].Value.ToLower())
{
case "utf8":
case "utf-8":
encoding = Encoding.UTF8;
break;
case "utf16":
case "utf-16":
encoding = Encoding.Unicode;
break;
case "utf32":
case "utf-32":
encoding = Encoding.UTF32;
break;
default:
try {
encoding = Encoding.GetEncoding(match.Groups[1].Value);
} catch (ArgumentException) {
}
break;
}
}
if (encoding == null)
{
foreach (string item in content.Between("<meta ", ">", StringComparison.OrdinalIgnoreCase).Select((item) => item.ToLower()))
{
if (item.Contains("utf8") || item.Contains("utf-8"))
{
encoding = Encoding.UTF8;
}
else if (item.Contains("utf16") || item.Contains("utf-16"))
{
encoding = Encoding.Unicode;
}
else if (item.Contains("utf32") || item.Contains("utf-32"))
{
encoding = Encoding.UTF32;
}
else if (item.Contains("gb2312"))
{
encoding = Encoding.GetEncoding("gb2312");
}
else if (item.Contains("gbk"))
{
encoding = Encoding.GetEncoding("gbk");
}
if (encoding != null)
{
break;
}
}
}
/*
* if can not determine the encoding type, we use default encoding.
*/
if (encoding == null || DefaultContentEncoding.Equals(encoding))
{
return(content);
}
}
}
return(encoding.GetString(data));
}
