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| 1 | +using Microsoft.Extensions.Options; |
| 2 | +using System.Collections.Generic; |
| 3 | +using System.Net; |
| 4 | +using System.Net.Http; |
| 5 | +using System.Text; |
| 6 | +using System.Threading.Tasks; |
| 7 | + |
| 8 | +namespace GeekLearning.RestKit.Core |
| 9 | +{ |
| 10 | + public abstract class ClientBase<TOptions> |
| 11 | + where TOptions : class, new() |
| 12 | + { |
| 13 | + private IMediaFormatterProvider mediaFormatterProvider; |
| 14 | + |
| 15 | + public ClientBase(IOptions<TOptions> options, IMediaFormatterProvider mediaFormatterProvider) |
| 16 | + { |
| 17 | + this.Options = options.Value; |
| 18 | + this.mediaFormatterProvider = mediaFormatterProvider; |
| 19 | + } |
| 20 | + |
| 21 | + protected TOptions Options { get; private set; } |
| 22 | + |
| 23 | + protected Task<TTarget> TransformResponseAsync<TTarget>(HttpResponseMessage message) |
| 24 | + { |
| 25 | + IMediaFormatter mediaFormatter = this.mediaFormatterProvider.GetMediaFormatter(message.Content.Headers.ContentType); |
| 26 | + if (mediaFormatter == null) |
| 27 | + { |
| 28 | + throw new UnsupportedMediaTypeApiException(message.Content.Headers.ContentType); |
| 29 | + } |
| 30 | + return mediaFormatter.TransformAsync<TTarget>(message.Content); |
| 31 | + } |
| 32 | + |
| 33 | + protected HttpContent TransformRequestBody(object data, string mediaType) |
| 34 | + { |
| 35 | + IMediaFormatter mediaFormatter = this.mediaFormatterProvider.GetMediaFormatter(mediaType); |
| 36 | + if (mediaFormatter == null) |
| 37 | + { |
| 38 | + throw new UnsupportedMediaTypeApiException(mediaType); |
| 39 | + } |
| 40 | + return mediaFormatter.Format(data); |
| 41 | + } |
| 42 | + |
| 43 | + /// <summary> |
| 44 | + /// Append the given query keys and values to the uri. |
| 45 | + /// </summary> |
| 46 | + /// <param name="uri">The base uri.</param> |
| 47 | + /// <param name="queryString">A collection of name value query pairs to append.</param> |
| 48 | + /// <returns>The combined result.</returns> |
| 49 | + protected static string AddQueryString( |
| 50 | + string uri, |
| 51 | + IEnumerable<KeyValuePair<string, object>> queryString) |
| 52 | + { |
| 53 | + var anchorIndex = uri.IndexOf('#'); |
| 54 | + var uriToBeAppended = uri; |
| 55 | + var anchorText = ""; |
| 56 | + // If there is an anchor, then the query string must be inserted before its first occurance. |
| 57 | + if (anchorIndex != -1) |
| 58 | + { |
| 59 | + anchorText = uri.Substring(anchorIndex); |
| 60 | + uriToBeAppended = uri.Substring(0, anchorIndex); |
| 61 | + } |
| 62 | + |
| 63 | + var queryIndex = uriToBeAppended.IndexOf('?'); |
| 64 | + var hasQuery = queryIndex != -1; |
| 65 | + |
| 66 | + var sb = new StringBuilder(); |
| 67 | + sb.Append(uriToBeAppended); |
| 68 | + foreach (var parameter in queryString) |
| 69 | + { |
| 70 | + if (parameter.Value == null) |
| 71 | + continue; |
| 72 | + sb.Append(hasQuery ? '&' : '?'); |
| 73 | + sb.Append(WebUtility.UrlEncode(parameter.Key)); |
| 74 | + sb.Append('='); |
| 75 | + sb.Append(WebUtility.UrlEncode(parameter.Value.ToString())); |
| 76 | + hasQuery = true; |
| 77 | + } |
| 78 | + |
| 79 | + sb.Append(anchorText); |
| 80 | + return sb.ToString(); |
| 81 | + } |
| 82 | + } |
| 83 | +} |
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