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

See more SendGrid Examples

Sends an email to a single recipient using SendGrid.

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

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#include <C_CkHttp.h>
#include <C_CkJsonObject.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkJsonObject json;
    HCkHttpResponse resp;

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

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

    // Adds the "Authorization: Bearer YOUR_API_KEY" header.
    CkHttp_putAuthToken(http,"YOUR_API_KEY");
    CkHttp_SetRequestHeader(http,"Content-Type","application/json");

    resp = CkHttp_PostJson3(http,"https://api.sendgrid.com/v3/mail/send","application/json",json);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        return;
    }

    if (CkHttp_getLastMethodSuccess(http) != TRUE) {
        printf("%s\n",CkHttp_lastErrorText(http));
    }
    else {
        printf("response status code: %d\n",CkHttpResponse_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.)
        printf("%s\n",CkHttpResponse_bodyStr(resp));
        CkHttpResponse_Dispose(resp);
    }



    CkHttp_Dispose(http);
    CkJsonObject_Dispose(json);

    }