add reader project (work in progress)

PocketSharp.Reader/PocketReader.cs

@@ -0,0 +1,115 @@
+using NReadability;
+using System;
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using PocketSharp.Models;
+
+namespace PocketSharp
+{
+  /// <summary>
+  /// PocketReader
+  /// </summary>
+  public partial class PocketReader
+  {
+    /// <summary>
+    /// REST client used for HTML retrieval
+    /// </summary>
+    protected readonly HttpClient _restClient;
+
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="PocketReader"/> class.
+    /// </summary>
+    public PocketReader()
+    {
+      // initialize REST client
+      _restClient = new HttpClient(new HttpClientHandler()
+      {
+        AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip
+      });
+
+      _restClient.DefaultRequestHeaders.Add("Accept", "text/html");
+    }
+
+
+
+    /// <summary>
+    /// Reads content from the given URI.
+    /// </summary>
+    /// <param name="item">The pocket item.</param>
+    /// <returns></returns>
+    public async Task<string> Read(PocketItem item)
+    {
+      return await Read(item.Uri);
+    }
+
+
+
+    /// <summary>
+    /// Reads content from the given URI.
+    /// </summary>
+    /// <param name="uri">The URI.</param>
+    /// <returns></returns>
+    public async Task<string> Read(Uri uri)
+    {
+      NReadabilityTranscoder transcoder = new NReadabilityTranscoder();
+
+      string htmlResponse = await Request(uri);
+
+      TranscodingInput input = new TranscodingInput(htmlResponse);
+      TranscodingResult result = transcoder.Transcode(input);
+
+      //      //new TranscodingInput(
+      //      //transcoder.Transcode(
+      //      //string transcodedContent =
+      //      //  transcoder.Transcode("https://github.com/marek-stoj/NReadability", out success);
+
+
+      return result.ExtractedContent;
+    }
+
+
+
+    /// <summary>
+    /// Fetches a resource
+    /// </summary>
+    protected async Task<string> Request(Uri uri)
+    {
+      HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, uri);
+
+      // make async request
+      HttpResponseMessage response = await _restClient.SendAsync(request);
+
+      // validate HTTP response
+      ValidateResponse(response);
+
+      // read response
+      var responseString = await response.Content.ReadAsStringAsync();
+
+      return responseString;
+    }
+
+
+    /// <summary>
+    /// Validates the response.
+    /// </summary>
+    /// <param name="response">The response.</param>
+    /// <returns></returns>
+    /// <exception cref="PocketException">
+    /// Error retrieving response
+    /// </exception>
+    protected void ValidateResponse(HttpResponseMessage response)
+    {
+      // no error found
+      if (response.StatusCode == HttpStatusCode.OK)
+      {
+        return;
+      }
+
+      string exceptionString = String.Format("Request error: {0} ({1})", response.ReasonPhrase, (int)response.StatusCode);
+
+      throw new PocketException(exceptionString);
+    }
+  }
+}