SgmlReader for Portable Class Library

Status

• NuGet Package:

• NuGet Package (Older PCLs):

• Continuous integration:

• Currently CI tests are broken. (These tests passed by running manually)

What is this?

• SgmlReader is "SGML" markup language parser, and derived from System.Xml.XmlReader in .NET CLR.
• But, most popular usage the "HTML" parser. (It's scraper!!)

Easy usage for HTML parse and get truly XDocument.

// Open from stream
using (var stream = new FileStream("target.html", FileMode.Open, FileAccess.Read, FileShare.Read))
{
    // Parse Html mode (Easy usage)
    XDocument document = SgmlReader.Parse(stream);

    // Manipulate XDocument anything...
}

Details

• SgmlReader based Mindtouch SgmlReader 1.8.11 (https://github.com/mindtouch/sgmlreader)

• Supported Portable class library, target platforms:

  • .NET Framework 4.0 (not net40-Client) or upper.
  • .NET Standard 1.0 or upper.
  • .NET Core 2.0 or upper.

• More easy usage: HTML4 DTD included. - HTML scraping ready!

• Unit test included.

• Class interface little bit changed from original implementation.

• NuGet package ID: CenterCLR.SgmlReader (https://www.nuget.org/packages/CenterCLR.SgmlReader/)

• GitHub: https://github.com/kekyo/CenterCLR.SgmlReader.git

• Build requirements:

  • Visual Studio 2017

• Advent calendar-driven project :-) (http://www.kekyo.net/2014/12/08/4441 in Japanese)

• Enjoy!

External reference capability usage (SGML handling, not tested :-)

// Open stream
using (var stream = new FileStream("target.sgml", FileMode.Open, FileAccess.Read, FileShare.Read))
{
    var tr = new StreamReader(stream, Encoding.UTF8);

    // Define base uri
    var baseUri = new Uri("http://www.example.com/");

    // Setup SgmlReader
    var sgmlReader = new SgmlReader(stream, baseUri,

        // Stream opener delegate (Separate physical resource access)
        uri => new StreamInformation
            {
                Stream = WebRequest.Create(uri).GetResponse().GetResponseStream(),
                DefaultEncoding = Encoding.UTF8
            })

        {
            WhitespaceHandling = true,
            CaseFolding = CaseFolding.ToLower
        };

    // create document
    var document = new XmlDocument();
    document.PreserveWhitespace = true;
    document.XmlResolver = null;
    document.Load(sgmlReader);
}

Versions

• 2018.8.31:
  • Fixed can't load Html.dtd embedded resource.
• 2018.8.30:
  • Support for .NET Framework 4.0, .NET Standard 1.0/2.0 and .NET Core 2.0.
  • Obsoleted all PCLs and net40-Client. If you use these platforms, try to fixed nuget package version at older.
  • Obsoleted key-signed.
  • Switched to new MSBuild format.
• 2017.6.12:
  • Support .NET Standard 1.0.
• 2016.3.27.2:
  • Add .NET 3.5-Client/4.0-Client assembly (with serializable exception type).
• 2016.3.27.1:
  • Refactor by target platforms.
  • Add PCL3 (dnxcore50)
• 2014.12.7.3:
  • Add 1 line parse method.
• 2014.12.7.2:
  • Direct handling the Stream class.
  • Initial parameter is set of Html parse mode.
• 2014.12.7.1:
  • Namespace changed "CenterCLR.Sgml".
  • More easy usage, HTML parse is default mode.
  • Native store app library included.
• 1.8.11.2014:
  • Initial release.

Derived original copyrights

/*
 * 
 * An XmlReader implementation for loading SGML (including HTML) converting it
 * to well formed XML, by adding missing quotes, empty attribute values, ignoring
 * duplicate attributes, case folding on tag names, adding missing closing tags
 * based on SGML DTD information, and so on.
 *
 * Copyright (c) 2002 Microsoft Corporation. All rights reserved. (Chris Lovett)
 *
 */

/*
 * 
 * Copyright (c) 2007-2013 MindTouch. All rights reserved.
 * www.mindtouch.com  oss@mindtouch.com
 *
 * For community documentation and downloads visit wiki.developer.mindtouch.com;
 * please review the licensing section.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */