/// <summary>
/// Process Http Request using instance of HttpClient.
/// </summary>
/// <param name="request">instance of <see cref="HttpHelperRequest"/></param>
/// <param name="cancellationToken">instance of <see cref="CancellationToken"/></param>
/// <returns>Instane of <see cref="HttpHelperResponse"/></returns>
public async Task <HttpHelperResponse> SendRequestAsync(HttpHelperRequest request, CancellationToken cancellationToken = default(CancellationToken))
{
await _semaphore.WaitAsync().ConfigureAwait(false);
HttpClient client = null;
try
{
var httpRequestMessage = request.ToHttpRequestMessage();
client = GetHttpClientInstance();
var response = await client.SendRequestAsync(httpRequestMessage).AsTask(cancellationToken).ConfigureAwait(false);
FixInvalidCharset(response);
return(new HttpHelperResponse(response));
}
finally
{
// Add the HttpClient instance back to the queue.
if (client != null)
{
_httpClientQueue.Enqueue(client);
}
_semaphore.Release();
}
}
/// <summary>
/// Process Http Request using instance of HttpClient.
/// </summary>
/// <param name="request">instance of <see cref="HttpHelperRequest"/></param>
/// <returns>Instane of <see cref="HttpHelperResponse"/></returns>
public async Task <HttpHelperResponse> SendRequestAsync(HttpHelperRequest request)
{
var httpRequestMessage = request.ToHttpRequestMessage();
var response = await _httpClient.SendRequestAsync(httpRequestMessage).AsTask().ConfigureAwait(false);
FixInvalidCharset(response);
return(new HttpHelperResponse(response));
}
/// <summary>
/// Get the response stream returned by a HTTP get request and save it to a local file.
/// </summary>
/// <param name="uri">Uri to request.</param>
/// <param name="targetFile">StorageFile to save the stream to.</param>
/// <returns>True if success.</returns>
public static async Task GetHttpStreamToStorageFileAsync(
this Uri uri,
StorageFile targetFile)
{
using (var fileStream = await targetFile.OpenAsync(FileAccessMode.ReadWrite).AsTask().ConfigureAwait(false))
{
using (var request = new HttpHelperRequest(uri, HttpMethod.Get))
{
using (var response = await HttpHelper.Instance.SendRequestAsync(request).ConfigureAwait(false))
{
if (response.Success)
{
await response.Content.WriteToStreamAsync(fileStream).AsTask().ConfigureAwait(false);
}
}
}
}
}
/// <summary>
/// Get the response stream returned by a HTTP get request.
/// </summary>
/// <param name="uri">Uri to request.</param>
/// <returns>Response stream</returns>
public static async Task <IRandomAccessStream> GetHttpStreamAsync(this Uri uri)
{
var outputStream = new InMemoryRandomAccessStream();
using (var request = new HttpHelperRequest(uri, HttpMethod.Get))
{
using (var response = await HttpHelper.Instance.SendRequestAsync(request).ConfigureAwait(false))
{
if (response.Success)
{
await response.Content.WriteToStreamAsync(outputStream).AsTask().ConfigureAwait(false);
outputStream.Seek(0);
}
}
}
return(outputStream);
}
/// <summary>
/// Process Http Request using instance of HttpClient.
/// </summary>
/// <param name="request">instance of <see cref="HttpHelperRequest"/></param>
/// <param name="cancellationToken">instance of <see cref="CancellationToken"/></param>
/// <returns>Instane of <see cref="HttpHelperResponse"/></returns>
public async Task <HttpHelperResponse> GetInputStreamAsync(HttpHelperRequest request, CancellationToken cancellationToken = default(CancellationToken))
{
await _semaphore.WaitAsync().ConfigureAwait(false);
HttpClient client = null;
try
{
var httpRequestMessage = request.ToHttpRequestMessage();
client = GetHttpClientInstance();
foreach (var header in request.Headers)
{
client.DefaultRequestHeaders[header.Key] = header.Value;
}
var response = await client.GetInputStreamAsync(httpRequestMessage.RequestUri).AsTask(cancellationToken).ConfigureAwait(false);
return(new HttpHelperResponse(new HttpResponseMessage {
Content = new HttpStreamContent(response)
}));
}
finally
{
// Add the HttpClient instance back to the queue.
if (client != null)
{
// Clean up default request headers
client.DefaultRequestHeaders.Clear();
_httpClientQueue.Enqueue(client);
}
_semaphore.Release();
}
}
