private static async Task <string> ExecuteRequest(string url, string method, string body)
{
var serviceUrl = ConfigurationProvider.GetServiceUrl(url);
if (_tokenObtainedTime < DateTime.Now.AddMinutes(-10))
{
await GetAccessToken();
}
var httpWebRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
httpWebRequest.Accept = "application/json";
httpWebRequest.Headers["Authorization"] = "Bearer " + _accessToken;
httpWebRequest.Headers["AcceptLanguage"] = "en_US";
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = method;
if (!method.Equals("GET"))
{
httpWebRequest.Headers["Content-Length"] = body.Length.ToString();
using (var requestStream = await httpWebRequest.GetRequestStreamAsync())
{
using (var streamWriter = new StreamWriter(requestStream))
{
streamWriter.Write(body);
}
requestStream.Dispose();
}
}
string result;
using (var response = await httpWebRequest.GetResponseAsync())
{
using (var stream = response.GetResponseStream())
{
using (var sr = new StreamReader(stream))
{
result = sr.ReadToEnd();
}
}
}
return(result);
}
/*
* Purpose: Gets the access token from PayPal
* Inputs: n/a
* Returns: access token
*
*/
private static async Task GetAccessToken()
{
var serviceUrl = ConfigurationProvider.GetServiceUrl("v1/oauth2/token");
var clientId = ConfigurationProvider.GetClientId();
var clientSecret = ConfigurationProvider.GetClientSecret();
var httpWebRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
httpWebRequest.Accept = "application/json";
httpWebRequest.Headers["Authorization"] = "Basic " + Convert.ToBase64String(Encoding.GetEncoding("ISO-8859-1").GetBytes(clientId + ":" + clientSecret));
httpWebRequest.Headers["AcceptLanguage"] = "en_US";
httpWebRequest.Method = "POST";
const string data = "grant_type=client_credentials";
var requestStream = await Task.Factory.FromAsync(httpWebRequest.BeginGetRequestStream, httpWebRequest.EndGetRequestStream, null);
using (var streamWriter = new StreamWriter(requestStream))
{
streamWriter.Write(data);
streamWriter.Flush();
}
string result;
using (var response = await httpWebRequest.GetResponseAsync())
{
using (var stream = response.GetResponseStream())
{
using (var sr = new StreamReader(stream))
{
result = sr.ReadToEnd();
}
}
}
var jObject = JObject.Parse(result);
_accessToken = (string)jObject["access_token"];
_tokenObtainedTime = DateTime.Now;
}
