(C++) SendGrid -- Send Email with Attachment

See more SendGrid Examples

Sends an email with an attachment.

For more information, see https://sendgrid.com/docs/for-developers/sending-email/curl-examples/#sending-a-basic-email-with-attachment

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#include <CkHttp.h>
#include <CkJsonObject.h>
#include <CkBinData.h>
#include <CkHttpResponse.h>

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

    CkHttp http;
    bool success;

    // 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"}]}],"from": {"email": "sender@example.com"},"subject":"Hello, World!","content": [{"type": "text/html","value": "Hey,<br>Please find attachment."}], "attachments": [{"content": "BASE64_ENCODED_CONTENT", "type": "text/plain", "filename": "attachment.txt"}]}'

    // 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"
    //         }
    //       ]
    //     }
    //   ],
    //   "from": {
    //     "email": "sender@example.com"
    //   },
    //   "subject": "Hello, World!",
    //   "content": [
    //     {
    //       "type": "text/html",
    //       "value": "Hey,<br>Please find attachment."
    //     }
    //   ],
    //   "attachments": [
    //     {
    //       "content": "BASE64_ENCODED_CONTENT",
    //       "type": "text/plain",
    //       "filename": "attachment.txt"
    //     }
    //   ]
    // }

    CkJsonObject json;
    json.UpdateString("personalizations[0].to[0].email","recipient@example.com");
    json.UpdateString("from.email","sender@example.com");
    json.UpdateString("subject","Hello, World!");
    json.UpdateString("content[0].type","text/html");
    json.UpdateString("content[0].value","Hey,<br>Please find attachment.");

    // Load a file to be attached.
    CkBinData bd;
    success = bd.LoadFile("qa_data/pdf/hello.pdf");

    json.UpdateString("attachments[0].content",bd.getEncoded("base64"));
    json.UpdateString("attachments[0].type","application/pdf");
    json.UpdateString("attachments[0].filename","hello.pdf");

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

    CkHttpResponse *resp = http.PostJson3("https://api.sendgrid.com/v3/mail/send","application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    int respStatusCode = resp->get_StatusCode();
    std::cout << "Response Status Code = " << respStatusCode << "\r\n";
    if (respStatusCode != 202) {
        std::cout << "Response Header:" << "\r\n";
        std::cout << resp->header() << "\r\n";
        std::cout << "Response Body:" << "\r\n";
        std::cout << resp->bodyStr() << "\r\n";
        std::cout << "Failed." << "\r\n";
        delete resp;
        return;
    }

    delete resp;
    std::cout << "Success." << "\r\n";
    }