/// <summary>
/// Gets a collection of headers to be used in an HTTP request.
/// </summary>
/// <param name="apiContext">APIContext object containing information needed to construct the headers map.</param>
/// <returns>A collection of headers.</returns>
public static Dictionary <string, string> GetHeaderMap(APIContext apiContext)
{
var headers = new Dictionary <string, string>();
/*
* The implementation is PayPal specific. The Authorization header is
* formed for OAuth or Basic, for OAuth system the authorization token
* passed as a parameter is used in creation of HTTP header, for Basic
* Authorization the ClientID and ClientSecret passed as parameters are
* used after a Base64 encoding.
*/
if (!string.IsNullOrEmpty(apiContext.AccessToken))
{
headers.Add(BaseConstants.AuthorizationHeader, apiContext.AccessToken);
}
else
{
var config = apiContext.GetConfigWithDefaults();
var clientId = config.ContainsKey(BaseConstants.ClientId) ? config[BaseConstants.ClientId] : null;
var clientSecret = config.ContainsKey(BaseConstants.ClientSecret) ? config[BaseConstants.ClientSecret] : null;
if (!string.IsNullOrEmpty(clientId) && !string.IsNullOrEmpty(clientSecret))
{
headers.Add(BaseConstants.AuthorizationHeader, "Basic " + EncodeToBase64(clientId, clientSecret));
}
}
/*
* Appends request Id which is used by PayPal API service for
* Idempotency
*/
var requestId = apiContext.MaskRequestId ? null : apiContext.RequestId;
if (!string.IsNullOrEmpty(requestId))
{
headers.Add(BaseConstants.PayPalRequestIdHeader, requestId);
}
// Add User-Agent header for tracking in PayPal system
var userAgentMap = UserAgentHeader.GetHeader();
if (userAgentMap != null && userAgentMap.Count > 0)
{
foreach (KeyValuePair <string, string> entry in userAgentMap)
{
headers.Add(entry.Key, entry.Value);
}
}
// Add any custom headers
if (apiContext.HTTPHeaders != null && apiContext.HTTPHeaders.Count > 0)
{
foreach (var header in apiContext.HTTPHeaders)
{
headers.Add(header.Key, header.Value);
}
}
return(headers);
}
/// <summary>
/// Configures and executes REST call: Supports JSON
/// </summary>
/// <typeparam name="T">Generic Type parameter for response object</typeparam>
/// <param name="apiContext">APIContext object</param>
/// <param name="httpMethod">HttpMethod type</param>
/// <param name="resource">URI path of the resource</param>
/// <param name="payload">JSON request payload</param>
/// <returns>Response object or null otherwise for void API calls</returns>
/// <exception cref="PayPal.HttpException">Thrown if there was an error sending the request.</exception>
/// <exception cref="PayPal.PaymentsException">Thrown if an HttpException was raised and contains a Payments API error object.</exception>
/// <exception cref="PayPal.PayPalException">Thrown for any other issues encountered. See inner exception for further details.</exception>
public static T ConfigureAndExecute <T>(APIContext apiContext, HttpMethod httpMethod, string resource, string payload = "")
{
// Verify the state of the APIContext object.
if (apiContext == null)
{
throw new PayPalException("APIContext object is null");
}
try
{
var config = apiContext.GetConfigWithDefaults();
var headersMap = GetHeaderMap(apiContext);
var endpoint = GetEndpoint(config);
// Create the URI where the HTTP request will be sent.
Uri uniformResourceIdentifier = null;
var baseUri = new Uri(endpoint);
if (!Uri.TryCreate(baseUri, resource, out uniformResourceIdentifier))
{
throw new PayPalException("Cannot create URL; baseURI=" + baseUri.ToString() + ", resourcePath=" + resource);
}
// Create the HttpRequest object that will be used to send the HTTP request.
var connMngr = ConnectionManager.Instance;
connMngr.GetConnection(config, uniformResourceIdentifier.ToString());
var httpRequest = connMngr.GetConnection(config, uniformResourceIdentifier.ToString());
httpRequest.Method = httpMethod.ToString();
// Set custom content type (default to [application/json])
if (headersMap != null && headersMap.ContainsKey(BaseConstants.ContentTypeHeader))
{
httpRequest.ContentType = headersMap[BaseConstants.ContentTypeHeader].Trim();
headersMap.Remove(BaseConstants.ContentTypeHeader);
}
else
{
httpRequest.ContentType = BaseConstants.ContentTypeHeaderJson;
}
// Set User-Agent HTTP header
if (headersMap.ContainsKey(BaseConstants.UserAgentHeader))
{
// aganzha
//iso-8859-1
var iso8851 = Encoding.GetEncoding("iso-8859-1", new EncoderReplacementFallback(string.Empty), new DecoderExceptionFallback());
var bytes = Encoding.Convert(Encoding.UTF8, iso8851, Encoding.UTF8.GetBytes(headersMap[BaseConstants.UserAgentHeader]));
httpRequest.UserAgent = iso8851.GetString(bytes);
headersMap.Remove(BaseConstants.UserAgentHeader);
}
// Set Custom HTTP headers
foreach (KeyValuePair <string, string> entry in headersMap)
{
httpRequest.Headers.Add(entry.Key, entry.Value);
}
// Log the headers
foreach (string headerName in httpRequest.Headers)
{
logger.DebugFormat(headerName + ":" + httpRequest.Headers[headerName]);
}
// Execute call
var connectionHttp = new HttpConnection(config);
var response = connectionHttp.Execute(payload, httpRequest);
if (typeof(T).Name.Equals("Object"))
{
return(default(T));
}
else if (typeof(T).Name.Equals("String"))
{
return((T)Convert.ChangeType(response, typeof(T)));
}
return(JsonFormatter.ConvertFromJson <T>(response));
}
catch (HttpException ex)
{
// Check to see if we have a Payments API error.
if (ex.StatusCode == HttpStatusCode.BadRequest)
{
PaymentsException paymentsEx;
if (ex.TryConvertTo <PaymentsException>(out paymentsEx))
{
throw paymentsEx;
}
}
throw;
}
catch (PayPalException)
{
// If we get a PayPalException, just rethrow to preserve the stack trace.
throw;
}
catch (System.Exception ex)
{
throw new PayPalException(ex.Message, ex);
}
}
