(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

Chilkat C/C++ Library Downloads
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#include <C_CkHttpW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkBinDataW.h>
#include <C_CkHttpResponseW.h>

void ChilkatSample(void)
    {
    HCkHttpW http;
    BOOL success;
    HCkJsonObjectW json;
    HCkBinDataW bd;
    HCkHttpResponseW resp;
    int respStatusCode;

    // 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"}]}],"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"
    //     }
    //   ]
    // }

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

    // Load a file to be attached.
    bd = CkBinDataW_Create();
    success = CkBinDataW_LoadFile(bd,L"qa_data/pdf/hello.pdf");

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

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

    resp = CkHttpW_PostJson3(http,L"https://api.sendgrid.com/v3/mail/send",L"application/json",json);
    if (CkHttpW_getLastMethodSuccess(http) == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(json);
        CkBinDataW_Dispose(bd);
        return;
    }

    respStatusCode = CkHttpResponseW_getStatusCode(resp);
    wprintf(L"Response Status Code = %d\n",respStatusCode);
    if (respStatusCode != 202) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",CkHttpResponseW_header(resp));
        wprintf(L"Response Body:\n");
        wprintf(L"%s\n",CkHttpResponseW_bodyStr(resp));
        wprintf(L"Failed.\n");
        CkHttpResponseW_Dispose(resp);
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(json);
        CkBinDataW_Dispose(bd);
        return;
    }

    CkHttpResponseW_Dispose(resp);
    wprintf(L"Success.\n");


    CkHttpW_Dispose(http);
    CkJsonObjectW_Dispose(json);
    CkBinDataW_Dispose(bd);

    }