(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 <C_CkJsonObjectW.h>
#include <C_CkHttpW.h>
#include <C_CkHttpRequestW.h>
#include <C_CkFileAccessW.h>
#include <C_CkByteData.h>
#include <C_CkHttpResponseW.h>

void ChilkatSample(void)
    {
    HCkJsonObjectW jsonToken;
    BOOL success;
    HCkHttpW http;
    HCkHttpRequestW req;
    HCkFileAccessW fac;
    HCkByteData jpgBytes;
    HCkHttpResponseW resp;
    HCkJsonObjectW jsonResponse;

    // 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..
    jsonToken = CkJsonObjectW_Create();
    success = CkJsonObjectW_LoadFile(jsonToken,L"qa_data/tokens/twitter.json");

    http = CkHttpW_Create();

    // Provide the OAuth 1.0a credentials:
    CkHttpW_putOAuth1(http,TRUE);
    CkHttpW_putOAuthConsumerKey(http,L"TWITTER_CONSUMER_KEY");
    CkHttpW_putOAuthConsumerSecret(http,L"TWITTER_CONSUMER_SECRET");
    CkHttpW_putOAuthToken(http,CkJsonObjectW_stringOf(jsonToken,L"oauth_token"));
    CkHttpW_putOAuthTokenSecret(http,CkJsonObjectW_stringOf(jsonToken,L"oauth_token_secret"));

    req = CkHttpRequestW_Create();
    CkHttpRequestW_putHttpVerb(req,L"POST");
    CkHttpRequestW_putContentType(req,L"multipart/form-data");
    CkHttpRequestW_putPath(req,L"/1.1/media/upload.json");

    CkHttpRequestW_AddHeader(req,L"Expect",L"100-continue");

    // Add a JPEG image file to the upload.
    fac = CkFileAccessW_Create();
    jpgBytes = CkByteData_Create();
    success = CkFileAccessW_ReadEntireFile(fac,L"qa_data/jpg/starfish.jpg",jpgBytes);
    CkHttpRequestW_AddBytesForUpload(req,L"media",L"starfish.jpg",jpgBytes);

    resp = CkHttpW_SynchronousRequest(http,L"upload.twitter.com",443,TRUE,req);
    if (CkHttpW_getLastMethodSuccess(http) != TRUE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkJsonObjectW_Dispose(jsonToken);
        CkHttpW_Dispose(http);
        CkHttpRequestW_Dispose(req);
        CkFileAccessW_Dispose(fac);
        CkByteData_Dispose(jpgBytes);
        return;
    }

    jsonResponse = CkJsonObjectW_Create();
    CkJsonObjectW_putEmitCompact(jsonResponse,FALSE);
    CkJsonObjectW_Load(jsonResponse,CkHttpResponseW_bodyStr(resp));

    if (CkHttpResponseW_getStatusCode(resp) != 200) {
        wprintf(L"%s\n",CkJsonObjectW_emit(jsonResponse));
        CkJsonObjectW_Dispose(jsonToken);
        CkHttpW_Dispose(http);
        CkHttpRequestW_Dispose(req);
        CkFileAccessW_Dispose(fac);
        CkByteData_Dispose(jpgBytes);
        CkJsonObjectW_Dispose(jsonResponse);
        return;
    }

    CkHttpResponseW_Dispose(resp);

    // Show the successful response:
    wprintf(L"%s\n",CkJsonObjectW_emit(jsonResponse));
    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",CkJsonObjectW_stringOf(jsonResponse,L"media_id_string"));
    wprintf(L"size = %d\n",CkJsonObjectW_IntOf(jsonResponse,L"size"));
    wprintf(L"image_type = %s\n",CkJsonObjectW_stringOf(jsonResponse,L"image.image_type"));
    wprintf(L"height/width = %d,%d\n",CkJsonObjectW_IntOf(jsonResponse,L"image.w"),CkJsonObjectW_IntOf(jsonResponse,L"image.h"));


    CkJsonObjectW_Dispose(jsonToken);
    CkHttpW_Dispose(http);
    CkHttpRequestW_Dispose(req);
    CkFileAccessW_Dispose(fac);
    CkByteData_Dispose(jpgBytes);
    CkJsonObjectW_Dispose(jsonResponse);

    }