/// <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
if (!apiContext.MaskRequestId && !string.IsNullOrEmpty(apiContext.RequestId))
{
headers.Add(BaseConstants.PayPalRequestIdHeader, apiContext.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>
/// Generates a new OAuth token useing the specified client credentials in the authorization request.
/// </summary>
/// <param name="base64ClientId">The base-64 encoded credentials to be used in the authorization request.</param>
/// <returns>The OAuth access token to use for making PayPal requests.</returns>
private string GenerateOAuthToken(string base64ClientId)
{
string response = null;
Uri uniformResourceIdentifier = null;
Uri baseUri = null;
if (config.ContainsKey(BaseConstants.OAuthEndpoint))
{
baseUri = new Uri(config[BaseConstants.OAuthEndpoint]);
}
else if (config.ContainsKey(BaseConstants.EndpointConfig))
{
baseUri = new Uri(config[BaseConstants.EndpointConfig]);
}
else if (config.ContainsKey(BaseConstants.ApplicationModeConfig))
{
string mode = config[BaseConstants.ApplicationModeConfig];
if (mode.Equals(BaseConstants.LiveMode))
{
baseUri = new Uri(BaseConstants.RESTLiveEndpoint);
}
else if (mode.Equals(BaseConstants.SandboxMode))
{
baseUri = new Uri(BaseConstants.RESTSandboxEndpoint);
}
else
{
throw new ConfigException("You must specify one of mode(live/sandbox) OR endpoint in the configuration");
}
}
bool success = Uri.TryCreate(baseUri, OAuthTokenPath, out uniformResourceIdentifier);
ConnectionManager connManager = ConnectionManager.Instance;
HttpWebRequest httpRequest = connManager.GetConnection(this.config, uniformResourceIdentifier.AbsoluteUri);
Dictionary <string, string> headers = new Dictionary <string, string>();
headers.Add("Authorization", "Basic " + base64ClientId);
string postRequest = "grant_type=client_credentials";
httpRequest.Method = "POST";
httpRequest.Accept = "*/*";
httpRequest.ContentType = "application/x-www-form-urlencoded";
// Set User-Agent HTTP header
var userAgentMap = UserAgentHeader.GetHeader();
foreach (KeyValuePair <string, string> entry in userAgentMap)
{
// 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(entry.Value));
httpRequest.UserAgent = iso8851.GetString(bytes);
}
// Set Custom HTTP headers
foreach (KeyValuePair <string, string> header in headers)
{
httpRequest.Headers.Add(header.Key, header.Value);
}
foreach (string headerName in httpRequest.Headers)
{
logger.DebugFormat(headerName + ":" + httpRequest.Headers[headerName]);
}
HttpConnection httpConnection = new HttpConnection(config);
try
{
response = httpConnection.Execute(postRequest, httpRequest);
}
catch (PayPal.HttpException ex)
{
// If we get an HTTP exception back and the status code is 401,
// then try and generate an IdentityException object to throw.
if (ex.StatusCode == HttpStatusCode.Unauthorized)
{
IdentityException identityEx;
if (ex.TryConvertTo <IdentityException>(out identityEx))
{
throw identityEx;
}
}
throw;
}
JObject deserializedObject = (JObject)JsonConvert.DeserializeObject(response);
string generatedToken = (string)deserializedObject["token_type"] + " " + (string)deserializedObject["access_token"];
this.ApplicationId = (string)deserializedObject["app_id"];
this.AccessTokenExpirationInSeconds = (int)deserializedObject["expires_in"];
this.AccessTokenLastCreationDate = DateTime.Now;
return(generatedToken);
}
/// <summary>
/// Override this method to customize User-Agent header value
/// </summary>
/// <returns>User-Agent header value string</returns>
protected Dictionary <string, string> FormUserAgentHeader()
{
return(UserAgentHeader.GetHeader());
}