public virtual async Task <ApiResponse> SendAsync(HttpMethod method, string resource, HttpContent content = null)
{
// Create the context here so we have access to it in the catch block
Polly.Context context = new Polly.Context();
//Create the Request
HttpRequestMessage request = new HttpRequestMessage(method, resource);
if (content != null)
{
request.Content = content;
}
// Set the PolicyExecutionContext so that it is available after execution of the request
// https://github.com/App-vNext/Polly/issues/505
request.SetPolicyExecutionContext(context);
AugmentContext(context, resource, request);
// Make the request
RequestCounter++;
LastRequestTimeStamp = DateTime.UtcNow;
try {
_logger.LogDebug($"{DateTime.Now.ToString()} : Sending request with Method: {method.ToString()} to Resource: {resource}");
using (var response = await _client.SendAsync(request, CancellationTokenSource.Token)) {
TransferRetryInfo(response.RequestMessage, context);
return(await _apiResponseBuilder.GetApiResponse(response, resource));
}
} catch (Exception exception) {
// Handles communication errors such as "Connection Refused" etc.
// Network failures (System.Net.Http.HttpRequestException)
// Timeouts (System.IO.IOException)
AugmentException(exception, resource, request);
TransferRetryInfo(exception, context);
return(_apiResponseBuilder.GetApiResponse(exception, request, resource));
}
}
// Send HttpContent, used by all above methods, accept any of the HttpContent sub-classes
// FormUrlEncodedContent: A container for name/value tuples encoded using application/x-www-form-urlencoded MIME type.
// MultipartContent: Provides a collection of HttpContent objects that get serialized using the multipart/* content type specification.
// MultipartFormDataContent: Provides a container for content encoded using multipart/form-data MIME type. (Use this format if you are uploading a file to a server)
// StreamContent: Provides HTTP content based on a stream.
// StringContent: Provides HTTP content based on a string.
// ObjectContent: Contains a value as well as an associated MediaTypeFormatter that will be used to serialize the value when writing this content.
// ObjectContent comes from the System.Net.Http.Formatting assembly provided by package Microsoft.AspNet.WebApi.Client
// HttpContent: A base class representing an HTTP entity body and content headers.
public virtual async Task <ApiResponse> SendAsync(HttpMethod method, string resourcePath, HttpContent content = null)
{
// Create the context here so we have access to it in the catch block
Polly.Context context = new Polly.Context();
//Create the Request
HttpRequestMessage request = new HttpRequestMessage(method, resourcePath);
if (content != null)
{
request.Content = content;
}
else
{
// content is normally provided for post and put methods
if (method == HttpMethod.Post || method == HttpMethod.Put)
{
_logger.LogDebug($"{DateTime.Now.ToString()} : SendAsync: The HttpContent is null for POST or PUT request!");
}
}
// Set the PolicyExecutionContext so that it is available after execution of the request
// https://github.com/App-vNext/Polly/issues/505
request.SetPolicyExecutionContext(context);
request.SetResourcePath(resourcePath);
// Make the request
RequestCount++;
PendingRequestCount++;
LastRequestTimeStamp = DateTime.UtcNow;
var requestTimer = new Stopwatch();
try {
if (content == null)
{
_logger.LogDebug($"{DateTime.Now.ToString()} : SendAsync: Sending request with Method: {method?.ToString()} HttpContent is null, RequestUri: {request.RequestUri}");
}
else
{
_logger.LogDebug($"{DateTime.Now.ToString()} : SendAsync: Sending request with Method: {method?.ToString()} HttpContent Type: \"{content?.GetType()?.Name?.ToString()}\" RequestUri: {request.RequestUri}");
}
requestTimer.Start();
using (var response = await _client.SendAsync(request, CancellationTokenSource.Token)) {
requestTimer.Stop();
TransferRetryInfo(response.RequestMessage, context);
return(await _apiResponseBuilder.GetApiResponse(response, resourcePath, requestTimer));
}
} catch (Exception exception) {
// Handles communication errors such as "Connection Refused" etc.
// Network failures (System.Net.Http.HttpRequestException)
// Timeouts (System.IO.IOException)
requestTimer.Stop();
TransferRetryInfo(exception, context);
return(_apiResponseBuilder.GetApiResponseForException(exception, request, resourcePath, requestTimer));
} finally {
PendingRequestCount--;
}
}
