Unicode C
Outlook Send Email using MIME Format

This example sends an email using MIME format via the Microsoft Graph Outlook REST API.
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Unicode C
#include <C_CkHttpW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkEmailW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkBinDataW.h>
#include <C_CkHttpResponseW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttpW http;
    HCkJsonObjectW jsonToken;
    HCkEmailW email;
    const wchar_t *contentIdStarfish;
    HCkStringBuilderW sbHtml;
    int numReplacements;
    const wchar_t *content;
    HCkBinDataW bdMime;
    HCkStringBuilderW sbBase64;
    HCkHttpResponseW resp;
    HCkJsonObjectW json;

    success = FALSE;

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

    http = CkHttpW_Create();

    // Use your previously obtained access token here:
    // See the following examples for getting an access token:
    //    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
    //    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
    //    Refresh Access Token (Azure AD v2.0 Endpoint).
    //    Refresh Access Token (Azure AD Endpoint).

    jsonToken = CkJsonObjectW_Create();
    success = CkJsonObjectW_LoadFile(jsonToken,L"qa_data/tokens/microsoftGraph.json");
    if (success == FALSE) {
        wprintf(L"%s\n",CkJsonObjectW_lastErrorText(jsonToken));
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(jsonToken);
        return;
    }

    CkHttpW_putAuthToken(http,CkJsonObjectW_stringOf(jsonToken,L"access_token"));

    // To send email, we'll POST to the following endpoint:
    // 
    // POST /users/{id | userPrincipalName}/sendMail
    // 
    // (The special keyword "me" may be used in place of a principal name.)
    // 

    // The body of the POST request will contain the MIME source of the email in base64 format.

    // Create a new email object
    email = CkEmailW_Create();
    CkEmailW_putSubject(email,L"Test Outlook API to Send HTML Email with Attachments");
    CkEmailW_putFrom(email,L"Mary <mary@somewhere.com>");
    CkEmailW_AddTo(email,L"Joe",L"joe@example.com");

    // Add a plain-text alternative body, which will likely never be seen.
    // (It is shown if the receiving email client is incapable of displaying HTML email.)
    CkEmailW_AddPlainTextAlternativeBody(email,L"This is a plain-text alternative body...");

    // Our HTML will include an image, so add the related image here.
    contentIdStarfish = CkEmailW_addRelatedFile(email,L"qa_data/jpg/starfish.jpg");
    if (CkEmailW_getLastMethodSuccess(email) == FALSE) {
        wprintf(L"%s\n",CkEmailW_lastErrorText(email));
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(jsonToken);
        CkEmailW_Dispose(email);
        return;
    }

    // The src attribute for the image tag is set to the contentIdStarfish:
    sbHtml = CkStringBuilderW_Create();
    CkStringBuilderW_Append(sbHtml,L"<html><body><p>This is an HTML email with an embedded image.</p>");
    CkStringBuilderW_Append(sbHtml,L"<p><img src=\"cid:CONTENT_ID_STARFISH\" /></p></body></html>");
    numReplacements = CkStringBuilderW_Replace(sbHtml,L"CONTENT_ID_STARFISH",contentIdStarfish);

    CkEmailW_AddHtmlAlternativeBody(email,CkStringBuilderW_getAsString(sbHtml));

    // Finally, add some attachments to the email.
    // Add a file attachment.
    success = CkEmailW_AddFileAttachment2(email,L"qa_data/pdf/fishing.pdf",L"application/pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkEmailW_lastErrorText(email));
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(jsonToken);
        CkEmailW_Dispose(email);
        CkStringBuilderW_Dispose(sbHtml);
        return;
    }

    // Add an attachment where the content is contained in a string.
    content = L"This is the content of the 2nd attached file.";
    CkEmailW_AddStringAttachment(email,L"someText.txt",content);

    // Get the email as multi-line base64..
    bdMime = CkBinDataW_Create();
    CkEmailW_GetMimeBd(email,bdMime);

    // Now get it as multi-line base64
    sbBase64 = CkStringBuilderW_Create();
    CkBinDataW_GetEncodedSb(bdMime,L"base64_mime",sbBase64);

    // Send the HTTP POST (i.e. send the email)
    resp = CkHttpResponseW_Create();
    success = CkHttpW_HttpSb(http,L"POST",L"https://graph.microsoft.com/v1.0/me/sendMail",sbBase64,L"utf-8",L"text/plain",resp);
    if (success == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkJsonObjectW_Dispose(jsonToken);
        CkEmailW_Dispose(email);
        CkStringBuilderW_Dispose(sbHtml);
        CkBinDataW_Dispose(bdMime);
        CkStringBuilderW_Dispose(sbBase64);
        CkHttpResponseW_Dispose(resp);
        return;
    }

    // The send succeeded if the response status code = 202.
    // In the success case, there is no response body.  (We just get the response code to know that it succeeded.)
    if (CkHttpResponseW_getStatusCode(resp) != 202) {
        json = CkJsonObjectW_Create();
        CkJsonObjectW_Load(json,CkHttpResponseW_bodyStr(resp));
        CkJsonObjectW_putEmitCompact(json,FALSE);
        wprintf(L"%s\n",CkJsonObjectW_emit(json));
        wprintf(L"Failed, response status code = %d\n",CkHttpResponseW_getStatusCode(resp));
    }
    else {
        wprintf(L"Outlook Mail Sent.\n");
    }



    CkHttpW_Dispose(http);
    CkJsonObjectW_Dispose(jsonToken);
    CkEmailW_Dispose(email);
    CkStringBuilderW_Dispose(sbHtml);
    CkBinDataW_Dispose(bdMime);
    CkStringBuilderW_Dispose(sbBase64);
    CkHttpResponseW_Dispose(resp);
    CkJsonObjectW_Dispose(json);

    }