/// <summary>
/// Intercepts the HttpResponse before it is consumed.
/// </summary>
/// <returns>The http connection interceptor context</returns>
/// <param name="context">Http connection interceptor context with the current state</param>
public HttpConnectionInterceptorContext InterceptResponse(HttpConnectionInterceptorContext context)
{
HttpResponseMessage responseMsg = context.responseMsg;
try
{
if ((int)responseMsg.StatusCode == 401)
{
//we need to get a new cookie
cookie = GetCookie(responseMsg.RequestMessage.RequestUri);
//don't resend request, failed to get cookie
if (cookie != null)
{
context.replayRequest = true;
}
else
{
context.replayRequest = false;
}
}
}
catch (Exception e)
{
Debug.WriteLine("Failed to process response interceptor. " + e.Message);
}
return(context);
}
/// <summary>
/// Intercepts the HttpResponse before it is consumed.
/// </summary>
/// <returns>The http connection interceptor context</returns>
/// <param name="context">Http connection interceptor context with the current state.</param>
public HttpConnectionInterceptorContext InterceptResponse(HttpConnectionInterceptorContext context)
{
if (context.responseMsg.StatusCode == System.Net.HttpStatusCode.Unauthorized)
{
//Handle authentication error here.
context.replayRequest = true;
}
return(context);
}
/// <summary>
/// Intercepts the HttpResponse before it is consumed.
/// </summary>
/// <returns>The http connection interceptor context</returns>
/// <param name="context">Http connection interceptor context with the current state.</param>
public HttpConnectionInterceptorContext InterceptResponse(HttpConnectionInterceptorContext context)
{
if (context.responseMsg.StatusCode == System.Net.HttpStatusCode.Unauthorized)
{
//Handle authentication error here.
context.replayRequest = true;
}
return context;
}
/// <summary>
/// Intercepts the HttpRequest before it is sent.
/// </summary>
/// <returns>The http connection interceptor context with any modifications.</returns>
/// <param name="context">Http connection interceptor context with the current state.</param>
public HttpConnectionInterceptorContext InterceptRequest(HttpConnectionInterceptorContext context)
{
HttpRequestMessage requestMeg = context.requestMsg;
if (shouldAttemptCookieRequest)
{
if (cookie == null)
{
cookie = GetCookie(context.requestMsg.RequestUri);
}
context.requestMsg.Headers.Add("Cookie", cookie);
}
return context;
}
/// <summary>
/// Intercepts the HttpRequest before it is sent.
/// </summary>
/// <returns>The http connection interceptor context with any modifications.</returns>
/// <param name="context">Http connection interceptor context with the current state.</param>
public HttpConnectionInterceptorContext InterceptRequest(HttpConnectionInterceptorContext context)
{
HttpRequestMessage requestMeg = context.requestMsg;
if (shouldAttemptCookieRequest)
{
if (cookie == null)
{
cookie = GetCookie(context.requestMsg.RequestUri);
}
context.requestMsg.Headers.Add("Cookie", cookie);
}
return(context);
}
/// <summary>
/// Intercepts the HttpRequest before it is sent.
/// </summary>
/// <returns>The http connection interceptor context with any modifications.</returns>
/// <param name="context">Http connection interceptor context with the current state.</param>
public HttpConnectionInterceptorContext InterceptRequest(HttpConnectionInterceptorContext context)
{
context.requestMsg.Headers.Authorization = authHeader;
return context;
}
/// <summary>
/// Intercepts the HttpResponse before it is consumed.
/// </summary>
/// <returns>The http connection interceptor context</returns>
/// <param name="context">Http connection interceptor context with the current state</param>
public HttpConnectionInterceptorContext InterceptResponse(HttpConnectionInterceptorContext context)
{
HttpResponseMessage responseMsg = context.responseMsg;
try
{
if ((int)responseMsg.StatusCode == 401)
{
//we need to get a new cookie
cookie = GetCookie(responseMsg.RequestMessage.RequestUri);
//don't resend request, failed to get cookie
if (cookie != null)
{
context.replayRequest = true;
}
else
{
context.replayRequest = false;
}
}
}
catch (Exception e)
{
Debug.WriteLine("Failed to process response interceptor. " + e.Message);
}
return context;
}
/// <summary>
/// Intercepts the HttpRequest before it is sent.
/// </summary>
/// <returns>The http connection interceptor context with any modifications.</returns>
/// <param name="context">Http connection interceptor context with the current state.</param>
public HttpConnectionInterceptorContext InterceptRequest(HttpConnectionInterceptorContext context)
{
context.requestMsg.Headers.Authorization = authHeader;
return(context);
}
private async Task<HttpResponseMessage> SendRequestAsync(HttpMethod method,
Uri uri,
Dictionary<string, string> headers,
HttpContent content)
{
Debug.WriteLine("HttpHelper:sendRequestAsync() METHOD:" + method);
Boolean retry = true;
int n = numberOfRetries;
while (retry && n-- > 0)
{
retry = false;
using (var request = new HttpRequestMessage(method, uri))
{
if (headers != null)
{
foreach (KeyValuePair<string,string> item in headers)
{
request.Headers.TryAddWithoutValidation(item.Key, item.Value);
}
}
request.Headers.TryAddWithoutValidation("User-Agent", "xamarin-cloudant/0.2");
request.Content = content;
//Call request interceptors
var currHttpConnContext = new HttpConnectionInterceptorContext(
request,
null);
foreach (IHttpConnectionRequestInterceptor requestInterceptor in requestInterceptors)
{
currHttpConnContext = requestInterceptor.InterceptRequest(currHttpConnContext);
}
//Process the request
try
{
Debug.WriteLine(FormatHttpRequestLog(request));
HttpResponseMessage response = await client.SendAsync(request).ConfigureAwait(continueOnCapturedContext: false);
Debug.WriteLine(FormatHttpResponseLog(response));
//Call response interceptors
currHttpConnContext.responseMsg = response;
foreach (IHttpConnectionResponseInterceptor responseInterceptor in responseInterceptors)
{
currHttpConnContext = responseInterceptor.InterceptResponse(currHttpConnContext);
}
retry = currHttpConnContext.replayRequest;
if (!retry)
return response;
}
catch (AggregateException ae)
{
Debug.WriteLine("=== Sent request, got EXCEPTION response. Message: " + ae.GetBaseException().Message);
ExceptionDispatchInfo.Capture(ae.GetBaseException()).Throw();
}
}
}
Debug.WriteLine("Maximum number of retries reached");
throw new Exception("Maximum number of retries reached. An HttpConnectionResponseInterceptor has set the replayRequest " +
"flag to true, but the maximum number of retries [" + numberOfRetries + "] has been reached.");
}
private async Task <HttpResponseMessage> SendRequestAsync(HttpMethod method,
Uri uri,
Dictionary <string, string> headers,
HttpContent content)
{
Debug.WriteLine("HttpHelper:sendRequestAsync() METHOD:" + method);
Boolean retry = true;
int n = numberOfRetries;
while (retry && n-- > 0)
{
retry = false;
using (var request = new HttpRequestMessage(method, uri))
{
if (headers != null)
{
foreach (KeyValuePair <string, string> item in headers)
{
request.Headers.TryAddWithoutValidation(item.Key, item.Value);
}
}
request.Headers.TryAddWithoutValidation("User-Agent", "xamarin-cloudant/0.2");
request.Content = content;
//Call request interceptors
var currHttpConnContext = new HttpConnectionInterceptorContext(
request,
null);
foreach (IHttpConnectionRequestInterceptor requestInterceptor in requestInterceptors)
{
currHttpConnContext = requestInterceptor.InterceptRequest(currHttpConnContext);
}
//Process the request
try
{
Debug.WriteLine(FormatHttpRequestLog(request));
HttpResponseMessage response = await client.SendAsync(request).ConfigureAwait(continueOnCapturedContext: false);
Debug.WriteLine(FormatHttpResponseLog(response));
//Call response interceptors
currHttpConnContext.responseMsg = response;
foreach (IHttpConnectionResponseInterceptor responseInterceptor in responseInterceptors)
{
currHttpConnContext = responseInterceptor.InterceptResponse(currHttpConnContext);
}
retry = currHttpConnContext.replayRequest;
if (!retry)
{
return(response);
}
}
catch (AggregateException ae)
{
Debug.WriteLine("=== Sent request, got EXCEPTION response. Message: " + ae.GetBaseException().Message);
ExceptionDispatchInfo.Capture(ae.GetBaseException()).Throw();
}
}
}
Debug.WriteLine("Maximum number of retries reached");
throw new Exception("Maximum number of retries reached. An HttpConnectionResponseInterceptor has set the replayRequest " +
"flag to true, but the maximum number of retries [" + numberOfRetries + "] has been reached.");
}
