/// <summary>
/// Asynchronously downloads an object (streaming) from the specified url.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="acceptEncoded">if set to <c>true</c> accept encoded response.</param>
/// <param name="postData">The post data. If null, GET will be used.</param>
/// <param name="parser">The function which will parse the stream.</param>
/// <param name="token">The ESI token, or null if none is used.</param>
public static async Task <DownloadResult <T> > DownloadStreamAsync <T>(Uri url,
ParseDataDelegate <T> parser, bool acceptEncoded = false,
HttpPostData postData = null, string token = null)
{
string urlValidationError;
if (!IsValidURL(url, out urlValidationError))
{
throw new ArgumentException(urlValidationError);
}
HttpClientServiceRequest request = new HttpClientServiceRequest();
request.AuthToken = token;
request.AcceptEncoded = acceptEncoded;
request.DataCompression = postData?.Compression ?? DataCompression.None;
try
{
var response = await request.SendAsync(url, (postData == null)?
HttpMethod.Get : HttpMethod.Post, postData, StreamAccept).
ConfigureAwait(false);
using (response)
{
var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
return(GetResult(url, stream, parser, response));
}
}
catch (HttpWebClientServiceException ex)
{
return(new DownloadResult <T>(default(T), ex));
}
}
/// <summary>
/// Asynchronously downloads a string from the specified url.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="method">The method.</param>
/// <param name="acceptEncoded">if set to <c>true</c> accept encoded response.</param>
/// <param name="postdata">The post data.</param>
/// <param name="dataCompression">The post data compression method.</param>
public static async Task<DownloadResult<String>> DownloadStringAsync(Uri url, HttpMethod method = null, bool acceptEncoded = false,
string postdata = null, DataCompression dataCompression = DataCompression.None)
{
string urlValidationError;
if (!IsValidURL(url, out urlValidationError))
throw new ArgumentException(urlValidationError);
HttpPostData postData = String.IsNullOrWhiteSpace(postdata) ? null : new HttpPostData(postdata, dataCompression);
HttpClientServiceRequest request = new HttpClientServiceRequest();
try
{
HttpResponseMessage response =
await request.SendAsync(url, method, postData, dataCompression, acceptEncoded, StringAccept).ConfigureAwait(false);
using (response)
{
Stream stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
return GetString(request.BaseUrl, stream);
}
}
catch (HttpWebClientServiceException ex)
{
return new DownloadResult<String>(String.Empty, ex);
}
}
/// <summary>
/// Asynchronously downloads an xml file from the specified url.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="method">The method.</param>
/// <param name="acceptEncoded">if set to <c>true</c> accept encoded response.</param>
/// <param name="postdata">The post data.</param>
/// <param name="dataCompression">The post data compression method.</param>
public static async Task <DownloadResult <IXPathNavigable> > DownloadXmlAsync(Uri url, HttpMethod method = null,
bool acceptEncoded = false, string postdata = null, DataCompression dataCompression = DataCompression.None)
{
string urlValidationError;
if (!IsValidURL(url, out urlValidationError))
{
throw new ArgumentException(urlValidationError);
}
HttpPostData postData = string.IsNullOrWhiteSpace(postdata) ? null : new HttpPostData(postdata, dataCompression);
HttpClientServiceRequest request = new HttpClientServiceRequest();
request.AuthToken = null;
request.AcceptEncoded = acceptEncoded;
request.DataCompression = dataCompression;
try
{
HttpResponseMessage response = await request.SendAsync(url, method, postData,
XmlAccept).ConfigureAwait(false);
using (response)
{
Stream stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
return(GetXmlDocument(request.BaseUrl, stream, response));
}
}
catch (HttpWebClientServiceException ex)
{
return(new DownloadResult <IXPathNavigable>(new XmlDocument(), ex));
}
}
/// <summary>
/// Asynchronously downloads an image from the specified url.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="param">The request parameters. If null, defaults will be used.</param>
public static async Task <DownloadResult <Image> > DownloadImageAsync(Uri url,
RequestParams param = null)
{
string urlValidationError;
if (!IsValidURL(url, out urlValidationError))
{
throw new ArgumentException(urlValidationError);
}
var request = new HttpClientServiceRequest();
try
{
var response = await request.SendAsync(url, param, ImageAccept).
ConfigureAwait(false);
using (response)
{
Stream stream = await response.Content.ReadAsStreamAsync().
ConfigureAwait(false);
return(GetImage(request.BaseUrl, stream, response));
}
}
catch (HttpWebClientServiceException ex)
{
return(new DownloadResult <Image>(null, ex));
}
}
/// <summary>
/// Asynchronously downloads an object (streaming) from the specified url.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="parser">The function which will parse the stream.</param>
/// <param name="param">The request parameters. If null, defaults will be used.</param>
public static async Task <DownloadResult <T> > DownloadStreamAsync <T>(Uri url,
ParseDataDelegate <T> parser, RequestParams param)
{
string urlValidationError;
if (!IsValidURL(url, out urlValidationError))
{
throw new ArgumentException(urlValidationError);
}
var request = new HttpClientServiceRequest();
try
{
var response = await request.SendAsync(url, param, StreamAccept).
ConfigureAwait(false);
using (response)
{
var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(
false);
return(GetResult(url, stream, parser, response));
}
}
catch (HttpWebClientServiceException ex)
{
return(new DownloadResult <T>(default(T), ex));
}
}
/// <summary>
/// Asynchronously downloads a string from the specified url.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="method">The method.</param>
/// <param name="acceptEncoded">if set to <c>true</c> accept encoded response.</param>
/// <param name="postdata">The post data.</param>
/// <param name="dataCompression">The post data compression method.</param>
public static async Task <DownloadResult <String> > DownloadStringAsync(Uri url, HttpMethod method = null, bool acceptEncoded = false,
string postdata = null, DataCompression dataCompression = DataCompression.None)
{
string urlValidationError;
if (!IsValidURL(url, out urlValidationError))
{
throw new ArgumentException(urlValidationError);
}
HttpPostData postData = String.IsNullOrWhiteSpace(postdata) ? null : new HttpPostData(postdata, dataCompression);
HttpClientServiceRequest request = new HttpClientServiceRequest();
try
{
HttpResponseMessage response =
await request.SendAsync(url, method, postData, dataCompression, acceptEncoded, StringAccept).ConfigureAwait(false);
using (response)
{
Stream stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
return(GetString(request.BaseUrl, stream));
}
}
catch (HttpWebClientServiceException ex)
{
return(new DownloadResult <String>(String.Empty, ex));
}
}
/// <summary>
/// Gets the web client.
/// </summary>
/// <returns></returns>
public static WebClient GetWebClient() => new WebClient
{
Proxy = HttpClientServiceRequest.GetWebProxy()
};
