src/Tizen.WebView/Tizen.WebView/RequestInterceptor.cs

   1 /*
   2  * Copyright (c) 2021 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the License);
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an AS IS BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 using System;
  18 using System.Collections.Generic;
  19 using System.ComponentModel;
  20 using System.IO;
  21 using System.Text;
  22
  23 namespace Tizen.WebView
  24 {
  25     /// <summary>
  26     /// This class provides methods and properties to handle a interpected request.
  27     /// </summary>
  28     /// <since_tizen> 8 </since_tizen>
  29     [EditorBrowsable(EditorBrowsableState.Never)]
  30     public class RequestInterceptor {
  31         private const string ResponseHeaderTemplate =
  32             "HTTP/1.1 {0} {1}\r\n" +
  33             "Content-Type: {2}; charset={3}\r\n" +
  34             "Content-Length: {4}\r\n";
  35
  36         private IntPtr _handle;
  37
  38         internal RequestInterceptor(IntPtr handle)
  39         {
  40             _handle = handle;
  41         }
  42
  43         /// <summary>
  44         /// The URL of the request.
  45         /// </summary>
  46         /// <since_tizen> 8 </since_tizen>
  47         [EditorBrowsable(EditorBrowsableState.Never)]
  48         public Uri Url
  49         {
  50             get
  51             {
  52                 return new Uri(Interop.ChromiumEwk.ewk_intercept_request_url_get(_handle));
  53             }
  54         }
  55
  56         /// <summary>
  57         /// Sets headers and data for the response.
  58         /// </summary>
  59         /// <since_tizen> 8 </since_tizen>
  60         /// <param name="mimeType"> Response's mime type. </param>
  61         /// <param name="encoding"> Response's character encoding. </param>
  62         /// <param name="statusCode"> HTTP response status code. </param>
  63         /// <param name="reasonPhrase"> HTTP response reason phrase. </param>
  64         /// <param name="responseHeaders"> Headers Map from HTTP header field names to field values. </param>
  65         /// <param name="data"> The streiam that provides the response's data. </param>
  66         /// <exception cref="ArgumentNullException">Thrown when <paramref name="data"/> is null.</exception>
  67         /// <exception cref="InvalidOperationException">Thrown when the native operation failed to set response.</exception>
  68         [EditorBrowsable(EditorBrowsableState.Never)]
  69         public void SetResponse(string mimeType, string encoding, int statusCode, string reasonPhrase, IDictionary<string, string> responseHeaders, Stream data)
  70         {
  71             if (data == null)
  72             {
  73                 throw new ArgumentNullException(nameof(data));
  74             }
  75
  76             byte[] body;
  77             using (MemoryStream ms = new MemoryStream())
  78             {
  79                 data.CopyTo(ms);
  80                 body = ms.ToArray();
  81
  82                 var headers = String.Format(ResponseHeaderTemplate, statusCode, reasonPhrase, mimeType, encoding, body.Length);
  83                 if (responseHeaders != null)
  84                 {
  85                     foreach(var header in responseHeaders)
  86                     {
  87                         headers += $"{header.Key}: {header.Value}\r\n";
  88                     }
  89                 }
  90                 headers += "\r\n";
  91
  92                 unsafe
  93                 {
  94                     fixed (byte* bodyPtr = body)
  95                     {
  96                         var ret = Interop.ChromiumEwk.ewk_intercept_request_response_set(_handle, headers, bodyPtr, (uint)body.Length);
  97                         if (!ret)
  98                         {
  99                             throw new InvalidOperationException("Failed to set response.");
 100                         }
 101                     }
 102                 }
 103             }
 104         }
 105
 106         /// <summary>
 107         /// Ignores the request, so WebView will load it.
 108         /// </summary>
 109         /// <since_tizen> 8 </since_tizen>
 110         [EditorBrowsable(EditorBrowsableState.Never)]
 111         public void Ignore()
 112         {
 113             Interop.ChromiumEwk.ewk_intercept_request_ignore(_handle);
 114         }
 115     }
 116 }