Just in case somebody with .NET/C# background will be looking for the similar topic - an UPS RESTFul API authorization and tracking info processing solution here is the one working well for me using proposed here approach:
#define TEST_MODE
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Text.Json.Nodes;
...
if (!ServicePointManager.Expect100Continue)
{
ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = (SecurityProtocolType)(3072); // SecurityProtocolType.Tls;
ServicePointManager.ServerCertificateValidationCallback += (sender, certificate, chain, errors) => true;
}
var myClientID = "{Type your ClientId here}";
var mySecretID = "{Type your SecretID here}";
#if TEST_MODE
var baseAddress = "https://wwwcie.ups.com"; // testing
#else
var baseAddress = "https://onlinetools.ups.com"; // production
#endif
var accessID = $"{myClientID}:{mySecretID}";
var base64AccessID = Convert.ToBase64String(Encoding.ASCII.GetBytes(accessID));
using (var client = new HttpClient())
{
// Get Access Token
var request = new HttpRequestMessage()
{
Method = HttpMethod.Post,
RequestUri = new Uri($"{baseAddress}/security/v1/oauth/token"),
Content = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("grant_type", "client_credentials")
})
};
request.Headers.Add("Authorization", $"Basic {base64AccessID}");
var response = await client.SendAsync(request);
var jsonResult = await response.Content.ReadAsStringAsync();
var result = JsonSerializer.Deserialize<JsonObject>(jsonResult);
var access_token = result?["access_token"]?.ToString();
// Get Tracking Info
var trackingNumber = "1Z5338FF0107231059"; // provided by UPS for testing
request = new HttpRequestMessage()
{
Method = HttpMethod.Get,
RequestUri = new Uri($"{baseAddress}/api/track/v1/details/{trackingNumber}")
};
request.Headers.Add("Authorization", $"Bearer {access_token}");
request.Headers.Add("transId", $"{DateTime.Now.Ticks}");
#if TEST_MODE
request.Headers.Add("transactionSrc", $"testing");
#else
request.Headers.Add("transactionSrc", $"{App Name and version}");
#endif
response = await client.SendAsync(request);
jsonResult = await response.Content.ReadAsStringAsync();
Console.WriteLine(jsonResult);
}
[UPDATE]
As Nick recently noted in his comment to this solution "I had to add a TLS1.2 declaration at the top of the code, otherwise it was throwing an error about not being able to establish a secure connection/channel" the original code has to be corrected by adding the following code lines on top of it:
if (!ServicePointManager.Expect100Continue)
{
ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = (SecurityProtocolType)(3072); // SecurityProtocolType.Tls;
ServicePointManager.ServerCertificateValidationCallback += (sender, certificate, chain, errors) => true;
}
I'd also note that to have the solution code to compile under .NET Framework 4.7.x/4.8 the Package Manager's command
Install-Package System.Text.Json
has to be executed in the Package Manager Console or you can instead of System.Text.Json use Newtonsoft.Json NuGet's package but in the latter case you may need to make some small code edits.
