(Unicode C) SendGrid Hello World -- Send Simple Email to Single Recipient

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Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://sendgrid.com/docs/for-developers/sending-email/curl-examples/

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#include <C_CkHttpW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkHttpResponseW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttpW http;
    HCkJsonObjectW json;
    HCkHttpResponseW resp;

    success = FALSE;

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

    http = CkHttpW_Create();

    // Implements the following CURL command:

    // curl --request POST \
    //   --url https://api.sendgrid.com/v3/mail/send \
    //   --header 'Authorization: Bearer YOUR_API_KEY' \
    //   --header 'Content-Type: application/json' \
    //   --data '{"personalizations": [{"to": [{"email": "recipient@example.com", "name": "Recipient Name"}]}],"from": {"email": "sendeexampexample@example.com"},"subject": "Hello, World!","content": [{"type": "text/plain", "value": "Heya!"}]}'

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    // The following JSON is sent in the request body.

    // {
    //   "personalizations": [
    //     {
    //       "to": [
    //         {
    //           "email": "recipient@example.com",
    //           "name": "Recipient Name"
    //         }
    //       ]
    //     }
    //   ],
    //   "from": {
    //     "email": "sendeexampexample@example.com"
    //   },
    //   "subject": "Hello, World!",
    //   "content": [
    //     {
    //       "type": "text/plain",
    //       "value": "Heya!"
    //     }
    //   ]
    // }

    json = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(json,L"personalizations[0].to[0].email",L"recipient@example.com");
    // The "name" is optional.
    CkJsonObjectW_UpdateString(json,L"personalizations[0].to[0].name",L"Recipient Name");
    CkJsonObjectW_UpdateString(json,L"from.email",L"sendeexampexample@example.com");
    CkJsonObjectW_UpdateString(json,L"subject",L"Hello, World!");
    CkJsonObjectW_UpdateString(json,L"content[0].type",L"text/plain");
    CkJsonObjectW_UpdateString(json,L"content[0].value",L"Heya!");

    // Adds the "Authorization: Bearer YOUR_API_KEY" header.
    CkHttpW_putAuthToken(http,L"YOUR_API_KEY");

    resp = CkHttpResponseW_Create();
    success = CkHttpW_HttpJson(http,L"POST",L"https://api.sendgrid.com/v3/mail/send",json,L"application/json",resp);
    if (success == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(json);
        CkHttpResponseW_Dispose(resp);
        return;
    }

    if (CkHttpW_getLastMethodSuccess(http) != TRUE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
    }
    else {
        wprintf(L"response status code: %d\n",CkHttpResponseW_getStatusCode(resp));
        // Display the response.
        // If successful, the response code is 202 and the response body string is empty.
        // (The response body string may also be empty for error response codes.)
        wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));
    }



    CkHttpW_Dispose(http);
    CkJsonObjectW_Dispose(json);
    CkHttpResponseW_Dispose(resp);

    }