(Unicode 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 <CkHttpW.h>
#include <CkJsonObjectW.h>
#include <CkBinDataW.h>
#include <CkHttpResponseW.h>

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

    CkHttpW 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"
    //     }
    //   ]
    // }

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

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

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

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

    CkHttpResponseW *resp = http.PostJson3(L"https://api.sendgrid.com/v3/mail/send",L"application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    int respStatusCode = resp->get_StatusCode();
    wprintf(L"Response Status Code = %d\n",respStatusCode);
    if (respStatusCode != 202) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",resp->header());
        wprintf(L"Response Body:\n");
        wprintf(L"%s\n",resp->bodyStr());
        wprintf(L"Failed.\n");
        delete resp;
        return;
    }

    delete resp;
    wprintf(L"Success.\n");
    }