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| <?xml version="1.0" encoding="utf-8" ?> | ||
| <configuration> | ||
| <startup> | ||
| <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" /> | ||
| </startup> | ||
| </configuration> |
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| <?xml version="1.0" encoding="utf-8"?> | ||
| <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> | ||
| <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" /> | ||
| <PropertyGroup> | ||
| <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> | ||
| <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> | ||
| <ProjectGuid>{0893F745-CB1A-427A-8E87-CA927273039A}</ProjectGuid> | ||
| <OutputType>Exe</OutputType> | ||
| <RootNamespace>MD2HTML</RootNamespace> | ||
| <AssemblyName>MD2HTML</AssemblyName> | ||
| <TargetFrameworkVersion>v4.8</TargetFrameworkVersion> | ||
| <FileAlignment>512</FileAlignment> | ||
| <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects> | ||
| <Deterministic>true</Deterministic> | ||
| </PropertyGroup> | ||
| <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> | ||
| <PlatformTarget>AnyCPU</PlatformTarget> | ||
| <DebugSymbols>true</DebugSymbols> | ||
| <DebugType>full</DebugType> | ||
| <Optimize>false</Optimize> | ||
| <OutputPath>..\..\..\bin\AnyCPU\Debug\MD2HTML\</OutputPath> | ||
| <DefineConstants>DEBUG;TRACE</DefineConstants> | ||
| <ErrorReport>prompt</ErrorReport> | ||
| <WarningLevel>4</WarningLevel> | ||
| </PropertyGroup> | ||
| <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> | ||
| <PlatformTarget>AnyCPU</PlatformTarget> | ||
| <DebugType>pdbonly</DebugType> | ||
| <Optimize>true</Optimize> | ||
| <OutputPath>..\..\..\bin\AnyCPU\Release\MD2HTML\</OutputPath> | ||
| <DefineConstants>TRACE</DefineConstants> | ||
| <ErrorReport>prompt</ErrorReport> | ||
| <WarningLevel>4</WarningLevel> | ||
| </PropertyGroup> | ||
| <ItemGroup> | ||
| <Reference Include="System" /> | ||
| <Reference Include="System.Core" /> | ||
| <Reference Include="System.Xml.Linq" /> | ||
| <Reference Include="System.Data.DataSetExtensions" /> | ||
| <Reference Include="Microsoft.CSharp" /> | ||
| <Reference Include="System.Data" /> | ||
| <Reference Include="System.Net.Http" /> | ||
| <Reference Include="System.Xml" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <Compile Include="MarkdownHandler.cs" /> | ||
| <Compile Include="Program.cs" /> | ||
| <Compile Include="Properties\AssemblyInfo.cs" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <None Include="App.config" /> | ||
| </ItemGroup> | ||
| <ItemGroup> | ||
| <PackageReference Include="HtmlSanitizer"> | ||
| <Version>5.0.355</Version> | ||
| </PackageReference> | ||
| <PackageReference Include="Markdig"> | ||
| <Version>0.22.0</Version> | ||
| </PackageReference> | ||
| </ItemGroup> | ||
| <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> | ||
| </Project> |
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|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| using System; | ||
| using System.IO; | ||
| using System.Linq; | ||
| using Ganss.XSS; | ||
| using Markdig; | ||
| using Markdig.Parsers; | ||
| using Markdig.Renderers; | ||
| using Markdig.Syntax; | ||
| using Markdig.Syntax.Inlines; | ||
|
|
||
| namespace MD2HTML | ||
| { | ||
| /// <summary> | ||
| /// Handles markdown files by converting them to Html, so they can display in a browser | ||
| /// </summary> | ||
| internal class MarkdownHandler | ||
| { | ||
| private readonly MarkdownPipeline pipeline; | ||
|
|
||
|
|
||
| private static MarkdownHandler instance; | ||
| internal static MarkdownHandler Instance | ||
| { | ||
| get | ||
| { | ||
| if (instance is null) { instance = new MarkdownHandler(); } | ||
| return instance; | ||
| } | ||
| } | ||
|
|
||
| private MarkdownHandler() | ||
| { | ||
| var pipelineBuilder = new MarkdownPipelineBuilder(); | ||
| pipeline = pipelineBuilder | ||
| .UseAdvancedExtensions() | ||
| .Build(); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Converts a markdown string into Html. | ||
| /// </summary> | ||
| /// <param name="writer"></param> | ||
| /// <param name="mdString"></param> | ||
| /// <returns>Returns true if any script tags was removed from the string</returns> | ||
| internal void ParseToHtml(ref StringWriter writer, string mdString, string mdPath) | ||
| { | ||
| if (writer is null) | ||
| throw new ArgumentNullException(nameof(writer)); | ||
|
|
||
| if (string.IsNullOrWhiteSpace(mdString)) | ||
| return; | ||
|
|
||
| // Remove scripts from user content for security reasons. | ||
| RemoveScriptTagsFromString(ref mdString); | ||
|
|
||
| var renderer = new HtmlRenderer(writer); | ||
| pipeline.Setup(renderer); | ||
|
|
||
| var document = MarkdownParser.Parse(mdString, pipeline); | ||
| ConvertRelativeLocalImagePathsToAbsolute(mdPath, document); | ||
|
|
||
| renderer.Render(document); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// For markdown local images needs to be in the same folder as the md file | ||
| /// referencing it with a relative path "./image.png", when we convert to html | ||
| /// we need the full path. This method finds relative image paths and converts them to absolute paths. | ||
| /// </summary> | ||
| private static void ConvertRelativeLocalImagePathsToAbsolute(string mdFilePath, MarkdownDocument document) | ||
| { | ||
| var imageLinks = document.Descendants<ParagraphBlock>() | ||
| .SelectMany(x => x.Inline.Descendants<LinkInline>()) | ||
| .Where(x => x.IsImage) | ||
| .Select(x => x).ToList(); | ||
|
|
||
| foreach (var image in imageLinks) | ||
| { | ||
| if (!image.Url.StartsWith("./")) | ||
| continue; | ||
|
|
||
| var imageName = image.Url.Split(new string[] { "./" }, StringSplitOptions.None); | ||
| var dir = Path.GetDirectoryName(mdFilePath); | ||
|
|
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| var htmlImagePathPrefix = @"file:///"; | ||
| var absoluteImagePath = Path.Combine(dir, imageName.Last()); | ||
|
|
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| image.Url = $"{htmlImagePathPrefix}{absoluteImagePath}"; | ||
| } | ||
| } | ||
|
|
||
| private static HtmlSanitizer htmlSanitizer = new HtmlSanitizer(); | ||
|
|
||
| /// <summary> | ||
| /// Clean up possible dangerous HTML content from the content string. | ||
| /// </summary> | ||
| /// <param name="content"></param> | ||
| /// <returns>Returns true if any content was removed from the content string</returns> | ||
| internal static bool RemoveScriptTagsFromString(ref string content) | ||
| { | ||
| var sanitizedContent = htmlSanitizer.Sanitize(content); | ||
| if (content.Equals(sanitizedContent)) | ||
| return false; | ||
|
|
||
| content = sanitizedContent; | ||
| return true; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| using System; | ||
| using System.IO; | ||
|
|
||
| namespace MD2HTML | ||
| { | ||
| static class Program | ||
| { | ||
| static void Main(string[] args) | ||
| { | ||
| Console.WriteLine(""); | ||
|
|
||
| while (true) | ||
| { | ||
| var line = Console.ReadLine(); | ||
| if (line == "<<<<<Sanitize>>>>>") | ||
| { | ||
| Sanitize(); | ||
| } | ||
| else if (line == "<<<<<Convert>>>>>") | ||
| { | ||
| Convert(); | ||
| } | ||
| Console.WriteLine("<<<<<Eod>>>>>"); | ||
| } | ||
| } | ||
|
|
||
| static void Sanitize() | ||
| { | ||
| StringWriter data = new StringWriter(); | ||
| GetData(ref data); | ||
|
|
||
| string output = data.ToString(); | ||
| MarkdownHandler.RemoveScriptTagsFromString(ref output); | ||
|
|
||
| Console.WriteLine(output); | ||
| } | ||
|
|
||
| static void Convert() | ||
| { | ||
| var mdPath = Console.ReadLine(); | ||
|
|
||
| StringWriter data = new StringWriter(); | ||
| GetData(ref data); | ||
|
|
||
| var instance = MarkdownHandler.Instance; | ||
| StringWriter output = new StringWriter(); | ||
| instance.ParseToHtml(ref output, data.ToString(), mdPath); | ||
|
|
||
| Console.WriteLine(output.ToString()); | ||
| } | ||
|
|
||
| static void GetData(ref StringWriter data) | ||
| { | ||
| while (true) | ||
| { | ||
| var line = Console.ReadLine(); | ||
| if (line == "<<<<<Eod>>>>>") | ||
| { | ||
| break; | ||
| } | ||
| data.WriteLine(line); | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,36 @@ | ||
| using System.Reflection; | ||
| using System.Runtime.CompilerServices; | ||
| using System.Runtime.InteropServices; | ||
|
|
||
| // General Information about an assembly is controlled through the following | ||
| // set of attributes. Change these attribute values to modify the information | ||
| // associated with an assembly. | ||
| [assembly: AssemblyTitle("MD2HTML")] | ||
| [assembly: AssemblyDescription("")] | ||
| [assembly: AssemblyConfiguration("")] | ||
| [assembly: AssemblyCompany("")] | ||
| [assembly: AssemblyProduct("MD2HTML")] | ||
| [assembly: AssemblyCopyright("Copyright © 2020")] | ||
| [assembly: AssemblyTrademark("")] | ||
| [assembly: AssemblyCulture("")] | ||
|
|
||
| // Setting ComVisible to false makes the types in this assembly not visible | ||
| // to COM components. If you need to access a type in this assembly from | ||
| // COM, set the ComVisible attribute to true on that type. | ||
| [assembly: ComVisible(false)] | ||
|
|
||
| // The following GUID is for the ID of the typelib if this project is exposed to COM | ||
| [assembly: Guid("0893f745-cb1a-427a-8e87-ca927273039a")] | ||
|
|
||
| // Version information for an assembly consists of the following four values: | ||
| // | ||
| // Major Version | ||
| // Minor Version | ||
| // Build Number | ||
| // Revision | ||
| // | ||
| // You can specify all the values or you can default the Build and Revision Numbers | ||
| // by using the '*' as shown below: | ||
| // [assembly: AssemblyVersion("1.0.*")] | ||
| [assembly: AssemblyVersion("1.0.0.0")] | ||
| [assembly: AssemblyFileVersion("1.0.0.0")] |