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WebCmdlets parse XML declaration to get encoding value, if present. #18748

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merged 10 commits into from
Jan 21, 2023
Merged

WebCmdlets parse XML declaration to get encoding value, if present. #18748

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64b238c
get { return to ->
CarloToso Dec 8, 2022
13c0ad9
#endregion
CarloToso Dec 8, 2022
a81c1c8
add regex to detect encoding from xml declaration
CarloToso Dec 8, 2022
6db83db
remove useless do-while
CarloToso Dec 8, 2022
42f4f2b
fix typo
CarloToso Dec 8, 2022
282c328
add comment
CarloToso Dec 8, 2022
ce00870
remove useless ()
CarloToso Dec 8, 2022
93c9b12
reuse the same substring
CarloToso Dec 8, 2022
41d524f
Updated with suggestions
CarloToso Dec 9, 2022
3f84029
Merge branch 'master' into xmlregex-streamhelper
CarloToso Jan 21, 2023
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remove useless do-while
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@CarloToso
CarloToso committed Dec 8, 2022
commit 6db83db2517552f08f1f687825b581c401f2d8be
33 changes: 15 additions & 18 deletions src/Microsoft.PowerShell.Commands.Utility/commands/utility/WebCmdlet/StreamHelper.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -441,27 +441,24 @@ internal static string DecodeStream(Stream stream, ref Encoding encoding)
string content = StreamToString(stream, encoding);
if (isDefaultEncoding)
{
do
// check for a charset attribute on the meta element to override the default
// we only look within the first 1k characters as the meta tag is in the head
// tag which is at the start of the document
Match match = s_metaRegex.Match(content.Substring(0, Math.Min(content.Length, 1024)));
Match match2 = s_xmlRegex.Match(content.Substring(0, Math.Min(content.Length, 256)));
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if (match.Success || match2.Success)
{
// check for a charset attribute on the meta element to override the default
// we only look within the first 1k characters as the meta tag is in the head
// tag which is at the start of the document
Match match = s_metaRegex.Match(content.Substring(0, Math.Min(content.Length, 1024)));
Match match2 = s_xmlRegex.Match(content.Substring(0, Math.Min(content.Length, 256)));
if (match.Success || match2.Success)
{
Encoding localEncoding = null;
string characterSet = (string.IsNullOrEmpty(match.Groups["charset"].Value)) ? match2.Groups["encoding"].Value : match.Groups["charset"].Value;
Encoding localEncoding = null;
string characterSet = (string.IsNullOrEmpty(match.Groups["charset"].Value)) ? match2.Groups["encoding"].Value : match.Groups["charset"].Value;

if (TryGetEncoding(characterSet, out localEncoding))
{
stream.Seek(0, SeekOrigin.Begin);
content = StreamToString(stream, localEncoding);
// report the encoding used.
encoding = localEncoding;
}
if (TryGetEncoding(characterSet, out localEncoding))
{
stream.Seek(0, SeekOrigin.Begin);
content = StreamToString(stream, localEncoding);
// report the encoding used.
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encoding = localEncoding;
}
} while (false);
}
}

return content;
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