(Unicode C++) Send GMail using REST API

See more GMail REST API Examples

Demonstrates how to send an email using the GMail REST API.

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#include <CkEmailW.h>
#include <CkStringBuilderW.h>
#include <CkJsonObjectW.h>
#include <CkHttpW.h>
#include <CkHttpResponseW.h>

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

    bool success;

    // Use the Chilkat Email API to create or load an email.
    CkEmailW email;

    // The From name/address don't need to be specified. 
    // GMail will automatically use your Gmail address if the following 2 lines are omitted.
    email.put_FromName(L"My Name");
    email.put_FromAddress(L"my_account_name@gmail.com");

    email.AddTo(L"John Smith",L"somebody@somewhere.com");
    // To add more recipients, make additional calls to AddTo or AddCC, one per recipient...

    email.put_Subject(L"This is a test GMail email created using Chilkat.");
    email.put_Charset(L"utf-8");
    email.AddPlainTextAlternativeBody(L"This is a test");

    // Create an HTML email body with an embedded image.
    const wchar_t *cid = email.addRelatedFile(L"qa_data/jpg/starfish.jpg");
    CkStringBuilderW sbHtml;
    sbHtml.Append(L"<html><body>This is a <b>test</b><br><img src=\"cid:STARFISH_CID\"/></body></html>");
    int numReplacements = sbHtml.Replace(L"STARFISH_CID",cid);

    email.AddHtmlAlternativeBody(sbHtml.getAsString());

    // OK.. we now have an HTML email with an embedded JPG image
    // We'll need to get the full MIME of the email encoded to a base64url string.
    CkStringBuilderW sbMime;
    email.GetMimeSb(sbMime);
    sbMime.Encode(L"base64url",L"utf-8");

    // The body of the HTTP request will be JSON..
    CkJsonObjectW json;
    json.UpdateSb(L"raw",sbMime);

    // Send the email...
    CkHttpW http;
    http.put_AuthToken(L"GMAIL-ACCESS-TOKEN");

    const wchar_t *url = L"https://www.googleapis.com/gmail/v1/users/me/messages/send";
    CkHttpResponseW *resp = http.PostJson3(url,L"application/json",json);
    if (http.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    // A status code of 200 indicates success.
    wprintf(L"Response status code: %d\n",resp->get_StatusCode());
    wprintf(L"Response body:\n");
    wprintf(L"%s\n",resp->bodyStr());
    delete resp;

    // The response body contains JSON.
    // Use the online tool at Generate JSON Parsing Code
    // to generate JSON parsing code.

    // A sample successful JSON response:

    // {
    //  "id": "166f0d4ac39e50bf",
    //  "threadId": "166f0d4ac39e50bf",
    //  "labelIds": [
    //   "SENT"
    //  ]
    // }
    }