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0afff60345
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72a9f401ba |
88
PolyFeed/Helpers/ReflectionHelpers.cs
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88
PolyFeed/Helpers/ReflectionHelpers.cs
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@ -0,0 +1,88 @@
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using System;
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using System.Collections.Generic;
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using System.Reflection;
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using System.Linq;
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using System.IO;
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namespace PolyFeed.Helpers
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{
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internal static class ReflectionUtilities
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{
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public static bool Verbose = true;
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public static IEnumerable<Assembly> IterateLoadedAssemblies()
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{
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return AppDomain.CurrentDomain.GetAssemblies();
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}
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public static IEnumerable<Type> IterateAllLoadedTypes()
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{
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return IterateLoadedAssemblies()
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.SelectMany((Assembly nextAssembly) => nextAssembly.GetTypes());
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}
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public static IEnumerable<Type> IterateLoadedTypes(Assembly targetAssembly)
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{
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return targetAssembly.GetTypes();
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}
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public static void LoadAssembliesDirectory(string directory)
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{
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foreach (string nextDll in Directory.EnumerateFiles(directory, "*.dll"))
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{
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AssemblyName assemblyName = AssemblyName.GetAssemblyName(nextDll);
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// Check that a strongname is actually present
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if (assemblyName.GetPublicKeyToken().Length < 8)
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continue;
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// Verify the strongname is valid.
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/*try
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{
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bool isOk = false;
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NativeMethods.StrongNameSignatureVerificationEx(nextDll, 0xFF, ref isOk);
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if (!isOk)
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continue;
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}
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catch (DllNotFoundException error)
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{
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Console.Error.WriteLine($"Warning: Unable to verify the integrity of the StrongName for '{nextDll}' (DLL not found: {error.Message}).");
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}*/
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try
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{
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Assembly.LoadFrom(nextDll);
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// FUTURE: Consider using Assembly.ReflectionOnlyLoadFrom in a separate AppDomain to figure out if there's anything useful in an assembly before loading it for reals
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}
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catch (BadImageFormatException error)
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{
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if (Verbose) Console.Error.WriteLine($"Error loading '{nextDll}': {error.Message}");
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}
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}
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}
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/// <summary>
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/// Searches the types present in the specified assembly to find a type that implements
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/// the specified interface.
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/// </summary>
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/// <param name="targetInterface">The target interface that returned types should implement.</param>
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/// <param name="assemblyToSearch">The assembly to search through for matching types.</param>
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public static IEnumerable<Type> IterateImplementingTypes(Type targetInterface, Assembly assemblyToSearch)
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{
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if (!targetInterface.IsInterface)
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throw new ArgumentException($"Error: The specified type {targetInterface} is not an " +
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"interface, so it can't be used to search for implementing types.");
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// FUTURE: Add caching here? Reflection is slow
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foreach (Type nextType in IterateAllLoadedTypes())
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{
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// Make sure it implements the specified interface
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if (!targetInterface.IsAssignableFrom(nextType))
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continue;
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yield return nextType;
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}
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}
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}
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}
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23
PolyFeed/ParserProviders/HtmlParserProvider.cs
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23
PolyFeed/ParserProviders/HtmlParserProvider.cs
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@ -0,0 +1,23 @@
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using System;
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using System.Net;
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using Microsoft.SyndicationFeed.Atom;
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namespace PolyFeed.ParserProviders
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{
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public class HtmlParserProvider : IParserProvider
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{
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public HtmlParserProvider()
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{
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}
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public void ParseWebResponse(FeedSource source, WebResponse response)
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{
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throw new NotImplementedException();
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}
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public void SetOutputFeed(AtomFeedWriter feed)
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{
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throw new NotImplementedException();
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}
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}
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}
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32
PolyFeed/ParserProviders/IParserProvider.cs
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32
PolyFeed/ParserProviders/IParserProvider.cs
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@ -0,0 +1,32 @@
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using System;
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using System.Net;
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using Microsoft.SyndicationFeed.Atom;
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namespace PolyFeed.ParserProviders
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{
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/// <summary>
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/// Defines the functionality that a source parser should provide.
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/// Sources are represented by a <see cref="FeedSource" /> object, and source parsers
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/// are responsible for parsing it and populating a given atom feed.
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/// </summary>
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public interface IParserProvider
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{
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/// <summary>
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/// The identifier of this provider.
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/// Used in the .toml configuration file to specify which parser to use.
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/// </summary>
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string Identifier { get; }
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/// <summary>
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/// Sets the output feed that parsed output should be written to.
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/// </summary>
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/// <param name="feed">The output feed writer that output should be written to.</param>
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void SetOutputFeed(AtomFeedWriter feed);
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/// <summary>
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/// Parses a web response that's paired with a given <see cref="FeedSource" />.
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/// </summary>
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/// <param name="source">The <see cref="FeedSource"/> object that the <paramref name="response"/> was generated from.</param>
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/// <param name="response">The <see cref="WebResponse"/> in question needs parsing.</param>
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void ParseWebResponse(FeedSource source, WebResponse response);
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}
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}
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@ -151,6 +151,9 @@
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<Compile Include="SnakeCasePropertySelector.cs" />
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<Compile Include="Helpers\HtmlHelpers.cs" />
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<Compile Include="Helpers\UserAgentHelper.cs" />
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<Compile Include="Helpers\ReflectionHelpers.cs" />
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<Compile Include="ParserProviders\IParserProvider.cs" />
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<Compile Include="ParserProviders\HtmlParserProvider.cs" />
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</ItemGroup>
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<ItemGroup>
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<None Include="packages.config" />
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@ -158,6 +161,7 @@
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<ItemGroup>
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<Folder Include="Salamander.Core\" />
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<Folder Include="Helpers\" />
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<Folder Include="ParserProviders\" />
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</ItemGroup>
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<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
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<Import Project="..\packages\NETStandard.Library.2.0.3\build\netstandard2.0\NETStandard.Library.targets" Condition="Exists('..\packages\NETStandard.Library.2.0.3\build\netstandard2.0\NETStandard.Library.targets')" />
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