/// <summary>
/// Process direct request with deserialized generic response. This method is called by all verb actions
/// </summary>
/// <typeparam name="T">Generic return type to deserialize response data in to</typeparam>
/// <param name="options">RextOption to configure http call</param>
/// <returns>Deserialized response of T</returns>
public async Task <CustomHttpResponse <T> > MakeRequest <T>(RextOptions options)
{
var rsp = await ProcessRequest(options);
var newRsp = new CustomHttpResponse <T>
{
StatusCode = rsp.StatusCode,
Message = rsp.Message,
Content = rsp.Content
};
bool deserializeSuccessOnly = options?.DeserializeSuccessResponseOnly ?? ConfigurationBundle.HttpConfiguration.DeserializeSuccessResponseOnly;
if (newRsp.StatusCode == System.Net.HttpStatusCode.OK || !deserializeSuccessOnly)
{
if (!string.IsNullOrEmpty(rsp.Content))
{
bool throwExOnFail = options.ThrowExceptionOnDeserializationFailure ?? ConfigurationBundle.HttpConfiguration.ThrowExceptionOnDeserializationFailure;
(bool status, string message, T result)output = (false, null, default(T));
if (options.ExpectedResponseFormat == ContentType.Application_JSON)
{
output = Helpers.DeserializeJSON <T>(rsp.Content, throwExOnFail);
}
else if (options.ExpectedResponseFormat == ContentType.Application_XML)
{
output = Helpers.DeserializeXML <T>(rsp.Content, throwExOnFail);
}
if (output.status)
{
newRsp.Data = output.result;
}
else
{
if (newRsp.StatusCode != System.Net.HttpStatusCode.OK && !deserializeSuccessOnly)
{
newRsp.Message = $"Type deserialization failed: To prevent deserialization of unsuccessful response types, set DeserializeSuccessResponseOnly=true";
if (throwExOnFail)
{
throw new RextException(newRsp.Message + " ---> To prevent deserialization of unsuccessful response types, set DeserializeSuccessResponseOnly = true");
}
return(newRsp);
}
else
{
newRsp.Message = output.message;
}
}
}
}
else
{
newRsp.Message += " --> To allow deserialization even when response status code is not successful, set DeserializeSuccessResponseOnly = false";
}
return(newRsp);
}
private async Task <CustomHttpResponse <string> > ProcessRequest(RextOptions options)
{
if (this.Client == null)
{
throw new ArgumentNullException("HttpClient object cannot be null");
}
// validate essential params
if (string.IsNullOrEmpty(options.Url))
{
if (string.IsNullOrEmpty(ConfigurationBundle.HttpConfiguration.BaseUrl))
{
throw new ArgumentNullException(nameof(options.Url), $"{nameof(options.Url)} is required. Provide fully qualified api endpoint.");
}
else
{
throw new ArgumentNullException(nameof(options.Url), $"{nameof(options.Url)} is required. Provide the other part of api endpoint to match the BaseUrl.");
}
}
if (options.Method == null)
{
throw new ArgumentNullException(nameof(options.Method), $"{nameof(options.Method)} is required. Use GET, POST etc..");
}
if (string.IsNullOrEmpty(options.ContentType))
{
throw new ArgumentNullException(nameof(options.ContentType), $"{nameof(options.ContentType) } is required. Use application/json, text.plain etc..");
}
if (string.IsNullOrEmpty(options.ExpectedResponseFormat))
{
throw new ArgumentNullException(nameof(options.ExpectedResponseFormat), $"{nameof(options.ExpectedResponseFormat)} is required. Use application/json, text.plain etc..");
}
// execute all user actions pre-call
ConfigurationBundle.BeforeCall?.Invoke();
var rsp = new CustomHttpResponse <string>();
var response = new HttpResponseMessage();
string responseString = string.Empty;
try
{
Uri uri = options.CreateUri(ConfigurationBundle.HttpConfiguration.BaseUrl);
if (uri == null)
{
throw new UriFormatException("Invalid request Uri");
}
var requestMsg = new HttpRequestMessage(options.Method, uri);
// set header if object has value
if (this.Headers != null)
{
requestMsg.SetHeader(this.Headers);
}
if (options.Header != null)
{
requestMsg.SetHeader(options.Header);
}
if (ConfigurationBundle.HttpConfiguration.Header != null)
{
requestMsg.SetHeader(ConfigurationBundle.HttpConfiguration.Header);
}
if (!string.IsNullOrEmpty(options.ContentType))
{
requestMsg.SetHeader("Accept", options.ExpectedResponseFormat);
}
// POST request
if (options.Method != HttpMethod.Get && options.Payload != null)
{
string strPayload = string.Empty;
if (options.IsForm)
{
strPayload = options.Payload.ToQueryString()?.TrimStart('?');
// form-data content post
if (!options.IsUrlEncoded)
{
// handle multipart/form-data
var formData = strPayload.Split('&');
var mpfDataBucket = new MultipartFormDataContent();
foreach (var i in formData)
{
var row = i.Split('=');
if (row.Length == 2) // check index to avoid null
{
mpfDataBucket.Add(new StringContent(row[1]), row[0]);
}
}
requestMsg.Content = mpfDataBucket;
}
else
{
// handle application/x-www-form-urlencoded
requestMsg.Content = new StringContent(strPayload, Encoding.UTF8, "application/x-www-form-urlencoded");
}
}
else
{
// convert object to specified content-type
if (options.ContentType == ContentType.Application_JSON)
{
strPayload = options.Payload.ToJson();
}
else if (options.ContentType == ContentType.Application_XML)
{
strPayload = options.Payload.ToXml();
}
else
{
strPayload = options.Payload.ToString();
}
requestMsg.Content = new StringContent(strPayload, Encoding.UTF8, options.ContentType);
}
}
// use stopwatch to monitor httpcall duration
if (ConfigurationBundle.EnableStopwatch)
{
Stopwatch = new Stopwatch();
Stopwatch.Start();
}
// check if HttpCompletionOption option is used
HttpCompletionOption httpCompletionOption = ConfigurationBundle.HttpConfiguration.HttpCompletionOption;
if (options.HttpCompletionOption.HasValue)
{
if (ConfigurationBundle.HttpConfiguration.HttpCompletionOption != options.HttpCompletionOption.Value)
{
httpCompletionOption = options.HttpCompletionOption.Value;
}
}
response = await this.Client.SendAsync(requestMsg, httpCompletionOption, CancellationToken.None).ConfigureAwait(false);
// set watch value to public member
if (ConfigurationBundle.EnableStopwatch)
{
Stopwatch.Stop();
}
rsp.StatusCode = response.StatusCode;
if (options.IsStreamResponse)
{
var stream = await response.Content.ReadAsStreamAsync();
if (stream.Length > 0)
{
using (var rd = new StreamReader(stream))
responseString = rd.ReadToEnd();
}
}
else
{
responseString = await response.Content.ReadAsStringAsync();
}
if (response.IsSuccessStatusCode)
{
rsp.Content = responseString;
rsp.Message = "Http call successful";
}
else
{
// this will always run before custom error-code actions
// always set ThrowExceptionIfNotSuccessResponse=false if you will use custom error-code actions
// perform checks for neccessary override
bool throwExIfNotSuccessRsp = options.ThrowExceptionIfNotSuccessResponse ?? ConfigurationBundle.HttpConfiguration.ThrowExceptionIfNotSuccessResponse;
if (throwExIfNotSuccessRsp)
{
throw new RextException($"Server response is {rsp.StatusCode}");
}
if (response.StatusCode == System.Net.HttpStatusCode.NotFound)
{
rsp.Content = $"Url not found: {requestMsg.RequestUri}";
}
else
{
rsp.Content = responseString;
}
rsp.Message = "Http call completed but not successful";
// handle code specific error from user
int code = (int)response.StatusCode;
if (code > 0 && ConfigurationBundle.StatusCodesToHandle != null && ConfigurationBundle.StatusCodesToHandle.Contains(code))
{
ConfigurationBundle.OnStatusCode?.Invoke(ReturnStatusCode);
}
}
// execute all user actions post-call
ConfigurationBundle.AfterCall?.Invoke();
return(rsp);
}
catch (Exception ex)
{
// execute all user actions on error
ConfigurationBundle.OnError?.Invoke();
if (ConfigurationBundle.SuppressRextExceptions)
{
if (ex?.Message.ToLower().Contains("a socket operation was attempted to an unreachable host") == true)
{
rsp.Message = "Network connection error";
}
else if (ex?.Message.ToLower().Contains("the character set provided in contenttype is invalid") == true)
{
rsp.Message = "Invald response ContentType. If you are expecting a Stream response then set RextOptions.IsStreamResponse=true";
}
else
{
rsp.Message = ex?.Message; //{ex?.InnerException?.Message ?? ex?.InnerException?.Message}";
}
return(rsp);
}
else
{
throw ex;
}
}
}