(Mono C#) Shippo Generate a Return Label

Demonstrates how to generate a pay-on-use return label.

For more information, see https://goshippo.com/docs/return-labels/

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// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();
bool success;

// Implements the following CURL command:

// curl https://api.goshippo.com/shipments/ \
//     -H "Authorization: ShippoToken <API_Token>" \
//     -d address_from="d799c2679e644279b59fe661ac8fa488" \
//     -d address_to="42236bcf36214f62bcc6d7f12f02a849" \
//     -d parcels=["7df2ecf8b4224763ab7c71fae7ec8274"] \
//     -d shipment_date="2013-12-03T12:00:00.000Z" \
//     -d extra='{ "is_return": true}' \
//     -d async=false

Chilkat.HttpRequest req = new Chilkat.HttpRequest();
req.HttpVerb = "POST";
req.Path = "/shipments/";
req.ContentType = "application/x-www-form-urlencoded";
req.AddParam("address_from","d799c2679e644279b59fe661ac8fa488");
req.AddParam("address_to","42236bcf36214f62bcc6d7f12f02a849");
req.AddParam("parcels","[\"7df2ecf8b4224763ab7c71fae7ec8274\"]");
req.AddParam("shipment_date","2013-12-03T12:00:00.000Z");
req.AddParam("extra","'{ \"is_return\": true}'");
req.AddParam("async","false");

req.AddHeader("Authorization","ShippoToken <API_Token>");

Chilkat.HttpResponse resp = http.PostUrlEncoded("https://api.goshippo.com/shipments/",req);
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Chilkat.StringBuilder sbResponseBody = new Chilkat.StringBuilder();
resp.GetBodySb(sbResponseBody);
Chilkat.JsonObject jResp = new Chilkat.JsonObject();
jResp.LoadSb(sbResponseBody);
jResp.EmitCompact = false;

Debug.WriteLine("Response Body:");
Debug.WriteLine(jResp.Emit());

int respStatusCode = resp.StatusCode;
Debug.WriteLine("Response Status Code = " + Convert.ToString(respStatusCode));
if (respStatusCode >= 400) {
    Debug.WriteLine("Response Header:");
    Debug.WriteLine(resp.Header);
    Debug.WriteLine("Failed.");

    return;
}

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// {}

// Sample code for parsing the JSON response...
// Use the following online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON