(Unicode C++) Upload Media to Twitter

Demonstrates uploading image or video files to Twitter. After uploading, the media_id can be used to attach the uploaded media to a tweet.

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#include <CkJsonObjectW.h>
#include <CkHttpW.h>
#include <CkHttpRequestW.h>
#include <CkFileAccessW.h>
#include <CkByteData.h>
#include <CkHttpResponseW.h>

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

    // Assume we've previously obtained an access token and saved it to a JSON file..
    CkJsonObjectW jsonToken;
    bool success = jsonToken.LoadFile(L"qa_data/tokens/twitter.json");

    CkHttpW http;

    // Provide the OAuth 1.0a credentials:
    http.put_OAuth1(true);
    http.put_OAuthConsumerKey(L"TWITTER_CONSUMER_KEY");
    http.put_OAuthConsumerSecret(L"TWITTER_CONSUMER_SECRET");
    http.put_OAuthToken(jsonToken.stringOf(L"oauth_token"));
    http.put_OAuthTokenSecret(jsonToken.stringOf(L"oauth_token_secret"));

    CkHttpRequestW req;
    req.put_HttpVerb(L"POST");
    req.put_ContentType(L"multipart/form-data");
    req.put_Path(L"/1.1/media/upload.json");

    req.AddHeader(L"Expect",L"100-continue");

    // Add a JPEG image file to the upload.
    CkFileAccessW fac;
    CkByteData jpgBytes;
    success = fac.ReadEntireFile(L"qa_data/jpg/starfish.jpg",jpgBytes);
    req.AddBytesForUpload(L"media",L"starfish.jpg",jpgBytes);

    CkHttpResponseW *resp = http.SynchronousRequest(L"upload.twitter.com",443,true,req);
    if (http.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    CkJsonObjectW jsonResponse;
    jsonResponse.put_EmitCompact(false);
    jsonResponse.Load(resp->bodyStr());

    if (resp->get_StatusCode() != 200) {
        wprintf(L"%s\n",jsonResponse.emit());
        return;
    }

    delete resp;

    // Show the successful response:
    wprintf(L"%s\n",jsonResponse.emit());
    wprintf(L"Success.\n");

    // A successful JSON response looks like this:

    // 	{
    // 	  "media_id": 793137045996646400,
    // 	  "media_id_string": "793137045996646400",
    // 	  "size": 6229,
    // 	  "expires_after_secs": 86400,
    // 	  "image": {
    // 	    "image_type": "image\/jpeg",
    // 	    "w": 120,
    // 	    "h": 120
    // 	  }
    // 	}
    // 

    // Get the information from the JSON:
    wprintf(L"media_id_string = %s\n",jsonResponse.stringOf(L"media_id_string"));
    wprintf(L"size = %d\n",jsonResponse.IntOf(L"size"));
    wprintf(L"image_type = %s\n",jsonResponse.stringOf(L"image.image_type"));
    wprintf(L"height/width = %d,%d\n",jsonResponse.IntOf(L"image.w"),jsonResponse.IntOf(L"image.h"));
    }