public MultipartDataBuilder Data(MultipartData data)
{
this.entries.AddRange(data.Entries);
return this;
}
public static HttpWebResponse Execute(Uri uri, MultipartData requestData, HttpRequestMethod requestMethod, IMutableProgressTracker progress, CancellationToken cancelToken)
{
var requestProgress = new MutableProgressTracker();
var responseProgress = new MutableProgressTracker();
var aggregateProgress = new AggregateProgressTracker(new ProgressTrackerCollection {
{ requestProgress, TimeEstimates.LongOperation.ProgressWeight },
{ responseProgress, TimeEstimates.ShortOperation.ProgressWeight },
});
aggregateProgress.BindTo(progress);
try {
var request = BuildRequest(uri, requestMethod, requestData, requestProgress, cancelToken);
bool canCancel = true;
cancelToken.Register(() => {
if (canCancel) {
request.Abort();
}
});
var response = (HttpWebResponse) request.GetResponse();
responseProgress.Progress = 1; // TODO HTTP download Progress
canCancel = false;
return response;
} catch (WebException e) {
if (e.Status == WebExceptionStatus.RequestCanceled) {
throw new OperationCanceledException(e.Message, e, cancelToken);
}
throw new OperationCanceledException(e.Message, e, cancelToken);
}
}
private static void WritePostData(HttpWebRequest request, MultipartData data, IMutableProgressTracker progress, CancellationToken cancelToken)
{
var boundary = data.Boundary;
request.ContentType = string.Format(@"multipart/form-data; {0}", MultipartHeader.KeyValuePair("boundary", boundary));
request.ContentLength = Utility.GetBoundaryByteCount(boundary) + data.GetByteCount();
using (var requestStream = request.GetRequestStream())
using (var progressStream = new ProgressTrackingStreamWrapper(requestStream, request.ContentLength)) {
progressStream.BindTo(progress);
Utility.WriteBoundary(progressStream, boundary);
data.Write(progressStream, cancelToken);
}
System.Diagnostics.Debug.Assert(progress.Progress == 1);
}
private static HttpWebRequest BuildRequest(Uri uri, HttpRequestMethod requestMethod, MultipartData data, IMutableProgressTracker progress, CancellationToken cancelToken)
{
switch (requestMethod) {
case HttpRequestMethod.Get:
return BuildGetRequest(uri, data, progress, cancelToken);
case HttpRequestMethod.Post:
return BuildPostRequest(uri, data, progress, cancelToken);
default:
throw new ArgumentException("Unknown request method", "requestMethod");
}
}
private static HttpWebRequest BuildPostRequest(Uri uri, MultipartData data, IMutableProgressTracker progress, CancellationToken cancelToken)
{
var request = CreateRequest(uri, @"POST");
if (data != null) {
WritePostData(request, data, progress, cancelToken);
}
progress.Progress = 1;
return request;
}
private static HttpWebRequest BuildGetRequest(Uri uri, MultipartData data, IMutableProgressTracker progress, CancellationToken cancelToken)
{
if (data != null) {
var parameters = new Dictionary<string, string>();
foreach (var entry in data.Entries) {
var formEntry = entry as FormMultipartEntry;
if (formEntry == null) {
throw new ArgumentException("Data must contain only form entries", "data");
}
parameters[formEntry.Name] = formEntry.Value;
}
var uriBuilder = new UriBuilder(uri) {
Query = HttpUtility.ToQueryString(parameters)
};
uri = uriBuilder.Uri;
}
var request = CreateRequest(uri, @"GET");
progress.Progress = 1;
return request;
}
