Issue 361: MediaDownloader can't download drive export list (which includes query parameters)

Src/GoogleApis/Apis/[Media]/Download/MediaDownloader.cs

 /*
 Copyright 2013 Google Inc
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 
 http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */
 
 using System;
+using System.Linq;
 using System.IO;
 using System.Net.Http.Headers;
 using System.Threading;
 using System.Threading.Tasks;
 
 using Google.Apis.Requests;
 using Google.Apis.Services;
 using Google.Apis.Util;
 
 namespace Google.Apis.Download
@@ skipping 154 matching lines @@
 CancellationToken cancellationToken)
 {
 // validate the parameters
 url.ThrowIfNull("url");
 stream.ThrowIfNull("stream");
 if (!stream.CanWrite)
 {
 throw new ArgumentException("stream doesn't support write operat
ions");
 }
 
- var builder = new RequestBuilder() { BaseUri = new Uri(url) };
+ RequestBuilder builder = null;
+
+ var uri = new Uri(url);
+ if (string.IsNullOrEmpty(uri.Query))
+ {
+ builder = new RequestBuilder() { BaseUri = new Uri(url) };
+ }
+ else
+ {
+ builder = new RequestBuilder() { BaseUri = new Uri(url.Substring
 (0, url.IndexOf("?"))) };
+ // remove '?' at the beginning
+ var query = uri.Query.Substring(1);
+ var pairs = from parameter in query.Split('&')
+ select parameter.Split('=');
+ // add each query parameter. each pair contains the key [0] and 
 then its value [1]
+ foreach (var p in pairs)
+ {
+ builder.AddParameter(RequestParameterType.Query, p[0], p[1])
 ;
+ }
+ }
 builder.AddParameter(RequestParameterType.Query, "alt", "media");
 
 long currentRequestFirstBytePos = 0;
 
 try
 {
 // this "infinite" loop stops when the "to" byte position in the
"Content-Range" header is the last
 // byte of the media ("length"-1 in the "Content-Range" header).
 // e.g. "Content-Range: 200-299/300" - "to"(299) = "length"(300)
- 1.
 while (true)
 {
 cancellationToken.ThrowIfCancellationRequested();
 
 var currentRequestLastBytePos = currentRequestFirstBytePos
ChunkSize - 1;
 
 // create the request and set the Range header
 var request = builder.CreateRequest();
 request.Headers.Range = new RangeHeaderValue(currentRequestF
irstBytePos,
 currentRequestLastBytePos);
 
 using (var response = await service.HttpClient.SendAsync(req
uest, cancellationToken).
 ConfigureAwait(false))
 {
 // read the content and copy to the parameter's stream
 var responseStream = await response.Content.ReadAsStream
Async().ConfigureAwait(false);
 responseStream.CopyTo(stream);
 
 // read the headers and check if all the media content w
as already downloaded
 var contentRange = response.Content.Headers.ContentRange
;
- currentRequestFirstBytePos = contentRange.To.Value 1;
- long mediaContentLength = contentRange.Length.Value;
+ long mediaContentLength;
+
+ if (contentRange == null)
+ {
+ // content range is null when the server doesn't adh
 ere the media download protocol, in·
+ // that case we got all the media in one chunk
+ currentRequestFirstBytePos = mediaContentLength =
+ response.Content.Headers.ContentLength.Value;
+ }
+ else
+ {
+  currentRequestFirstBytePos = contentRange.To.Value 
  1;
+  mediaContentLength = contentRange.Length.Value;
+ }
 
 if (currentRequestFirstBytePos == mediaContentLength)
 {
 var progress = new DownloadProgress(DownloadStatus.C
ompleted, mediaContentLength);
 UpdateProgress(progress);
 return progress;
 }
 }
 
 UpdateProgress(new DownloadProgress(DownloadStatus.Downloadi
ng, currentRequestFirstBytePos));
 }
 }
 catch (Exception ex)
 {
 var progress = new DownloadProgress(ex, currentRequestFirstByteP
os);
 UpdateProgress(progress);
 return progress;
 }
 }
 }
 }