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