private void GetResponseAsync <T>(Dictionary <string, string> parameters, Action <FlickrResult <T> > callback) where T : IFlickrParsable, new()
{
CheckApiKey();
parameters["api_key"] = ApiKey;
// If performing one of the old 'flickr.auth' methods then use old authentication details.
string method = parameters["method"];
if (method.StartsWith("flickr.auth") && !method.EndsWith("oauth.checkToken"))
{
if (!String.IsNullOrEmpty(AuthToken))
{
parameters["auth_token"] = AuthToken;
}
}
else
{
// If OAuth Token exists or no authentication required then use new OAuth
if (!String.IsNullOrEmpty(OAuthAccessToken) || String.IsNullOrEmpty(AuthToken))
{
OAuthGetBasicParameters(parameters);
if (!String.IsNullOrEmpty(OAuthAccessToken))
{
parameters["oauth_token"] = OAuthAccessToken;
}
}
else
{
parameters["auth_token"] = AuthToken;
}
}
string url;
if (!String.IsNullOrEmpty(sharedSecret))
{
url = CalculateUri(parameters, true);
}
else
{
url = CalculateUri(parameters, false);
}
lastRequest = url;
try
{
FlickrResponder.GetDataResponseAsync(this, BaseUri.AbsoluteUri, parameters, (r)
=>
{
FlickrResult <T> result = new FlickrResult <T>();
if (r.HasError)
{
result.Error = r.Error;
}
else
{
try
{
lastResponse = r.Result;
XmlReaderSettings settings = new XmlReaderSettings();
settings.IgnoreWhitespace = true;
XmlReader reader = XmlReader.Create(new StringReader(r.Result), settings);
if (!reader.ReadToDescendant("rsp"))
{
throw new XmlException("Unable to find response element 'rsp' in Flickr response");
}
while (reader.MoveToNextAttribute())
{
if (reader.LocalName == "stat" && reader.Value == "fail")
{
throw ExceptionHandler.CreateResponseException(reader);
}
continue;
}
reader.MoveToElement();
reader.Read();
T t = new T();
((IFlickrParsable)t).Load(reader);
result.Result = t;
result.HasError = false;
}
catch (Exception ex)
{
result.Error = ex;
}
}
if (callback != null)
{
callback(result);
}
});
}
catch (Exception ex)
{
FlickrResult <T> result = new FlickrResult <T>();
result.Error = ex;
if (null != callback)
{
callback(result);
}
}
}
private void UploadDataAsync(Stream imageStream, string fileName, Uri uploadUri, Dictionary <string, string> parameters, Action <FlickrResult <string> > callback)
{
string boundary = "FLICKR_MIME_" + DateTime.Now.ToString("yyyyMMddhhmmss", System.Globalization.DateTimeFormatInfo.InvariantInfo);
string authHeader = FlickrResponder.OAuthCalculateAuthHeader(parameters);
var dataBuffer = CreateUploadData(imageStream, fileName, parameters, boundary);
var req = WebRequest.Create(uploadUri);
req.Method = "POST";
req.ContentType = "multipart/form-data; boundary=" + boundary;
if (!string.IsNullOrEmpty(authHeader))
{
req.Headers["Authorization"] = authHeader;
}
req.BeginGetRequestStream(
r =>
{
using (var reqStream = req.EndGetRequestStream(r))
{
var bufferSize = 32 * 1024;
if (dataBuffer.Length / 100 > bufferSize)
{
bufferSize = bufferSize * 2;
}
dataBuffer.UploadProgress += (o, e) => { if (OnUploadProgress != null)
{
OnUploadProgress(this, e);
}
};
dataBuffer.CopyTo(reqStream, bufferSize);
reqStream.Close();
}
req.BeginGetResponse(
r2 =>
{
var result = new FlickrResult <string>();
try
{
var res = req.EndGetResponse(r2);
var sr = new StreamReader(res.GetResponseStream());
var responseXml = sr.ReadToEnd();
sr.Close();
var settings = new XmlReaderSettings {
IgnoreWhitespace = true
};
var reader = XmlReader.Create(new StringReader(responseXml), settings);
if (!reader.ReadToDescendant("rsp"))
{
throw new XmlException("Unable to find response element 'rsp' in Flickr response");
}
while (reader.MoveToNextAttribute())
{
if (reader.LocalName == "stat" && reader.Value == "fail")
{
throw ExceptionHandler.CreateResponseException(reader);
}
}
reader.MoveToElement();
reader.Read();
var t = new UnknownResponse();
((IFlickrParsable)t).Load(reader);
result.Result = t.GetElementValue("photoid");
result.HasError = false;
}
catch (Exception ex)
{
if (ex is WebException)
{
var oauthEx = new OAuthException(ex);
result.Error = string.IsNullOrEmpty(oauthEx.Message) ? ex : oauthEx;
}
else
{
result.Error = ex;
}
}
callback(result);
},
this);
},
this);
}
private void DoGetResponseAsync <T>(Uri url, Action <FlickrResult <T> > callback) where T : IFlickrParsable, new()
{
string postContents = String.Empty;
if (url.AbsoluteUri.Length > 2000)
{
postContents = url.Query.Substring(1);
url = new Uri(url, String.Empty);
}
FlickrResult <T> result = new FlickrResult <T>();
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
request.ContentType = "application/x-www-form-urlencoded";
request.Method = "POST";
request.BeginGetRequestStream(requestAsyncResult =>
{
using (Stream s = request.EndGetRequestStream(requestAsyncResult))
{
using (StreamWriter sw = new StreamWriter(s))
{
sw.Write(postContents);
sw.Close();
}
s.Close();
}
request.BeginGetResponse(responseAsyncResult =>
{
try
{
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(responseAsyncResult);
using (StreamReader sr = new StreamReader(response.GetResponseStream()))
{
string responseXml = sr.ReadToEnd();
lastResponse = responseXml;
XmlReaderSettings settings = new XmlReaderSettings();
settings.IgnoreWhitespace = true;
XmlReader reader = XmlReader.Create(new StringReader(responseXml), settings);
if (!reader.ReadToDescendant("rsp"))
{
throw new XmlException("Unable to find response element 'rsp' in Flickr response");
}
while (reader.MoveToNextAttribute())
{
if (reader.LocalName == "stat" && reader.Value == "fail")
{
throw ExceptionHandler.CreateResponseException(reader);
}
continue;
}
reader.MoveToElement();
reader.Read();
T t = new T();
((IFlickrParsable)t).Load(reader);
result.Result = t;
result.HasError = false;
sr.Close();
}
if (null != callback)
{
callback(result);
}
}
catch (Exception ex)
{
result.Error = ex;
if (null != callback)
{
callback(result);
}
}
}, null);
}, null);
}
private async Task <FlickrResult <T> > GetResponseAsync <T>(Dictionary <string, string> parameters) where T : IFlickrParsable, new()
{
var hashApiSig = CalculateAuthSignature(parameters);
CheckApiKey();
FlickrResult <T> result = new FlickrResult <T>();
var parseResult = new Func <Uri, string, T>((uri, response) =>
{
lastResponse = response;
XmlReaderSettings settings = new XmlReaderSettings();
settings.IgnoreWhitespace = true;
XmlReader reader = XmlReader.Create(new StringReader(response.Trim()), settings);
if (!reader.ReadToDescendant("rsp"))
{
throw new XmlException("Unable to find response element 'rsp' in Flickr response");
}
while (reader.MoveToNextAttribute())
{
if (reader.LocalName == "stat" && reader.Value == "fail")
{
throw ExceptionHandler.CreateResponseException(reader);
}
continue;
}
reader.MoveToElement();
reader.Read();
T t = new T();
((IFlickrParsable)t).Load(reader);
return(t);
});
parameters["api_key"] = ApiKey;
if (!String.IsNullOrEmpty(OAuthAccessToken) || String.IsNullOrEmpty(AuthToken))
{
OAuthGetBasicParameters(parameters);
parameters.Remove("api_key");
if (!String.IsNullOrEmpty(OAuthAccessToken))
{
parameters["oauth_token"] = OAuthAccessToken;
}
}
else
{
parameters["auth_token"] = AuthToken;
}
Uri url;
if (!String.IsNullOrEmpty(sharedSecret))
{
url = CalculateUri(parameters, true);
}
else
{
url = CalculateUri(parameters, false);
}
lastRequest = url.AbsoluteUri;
//get cached result if its there
var cachedResult = TryGetCacheCall(hashApiSig);
if (!string.IsNullOrEmpty(cachedResult))
{
result.Result = parseResult(url, cachedResult);
result.HashCall = hashApiSig;
result.HasError = false;
return(result);
}
try
{
var r = await FlickrResponder.GetDataResponseAsync(this, hashApiSig, BaseUri.AbsoluteUri, parameters);
if (r.HasError)
{
result.Error = r.Error;
}
else
{
//cache results
CacheCall(r.HashCall, r.Result);
result.Result = parseResult(url, r.Result);
result.HashCall = r.HashCall;
result.HasError = false;
}
}
catch (Exception ex)
{
result.Error = ex;
}
return(result);
}