(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_CkJsonObject.h>
#include <C_CkHttp.h>
#include <C_CkHttpRequest.h>
#include <C_CkFileAccess.h>
#include <C_CkByteData.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    HCkJsonObject jsonToken;
    BOOL success;
    HCkHttp http;
    HCkHttpRequest req;
    HCkFileAccess fac;
    HCkByteData jpgBytes;
    HCkHttpResponse resp;
    HCkJsonObject 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 = CkJsonObject_Create();
    success = CkJsonObject_LoadFile(jsonToken,"qa_data/tokens/twitter.json");

    http = CkHttp_Create();

    // Provide the OAuth 1.0a credentials:
    CkHttp_putOAuth1(http,TRUE);
    CkHttp_putOAuthConsumerKey(http,"TWITTER_CONSUMER_KEY");
    CkHttp_putOAuthConsumerSecret(http,"TWITTER_CONSUMER_SECRET");
    CkHttp_putOAuthToken(http,CkJsonObject_stringOf(jsonToken,"oauth_token"));
    CkHttp_putOAuthTokenSecret(http,CkJsonObject_stringOf(jsonToken,"oauth_token_secret"));

    req = CkHttpRequest_Create();
    CkHttpRequest_putHttpVerb(req,"POST");
    CkHttpRequest_putContentType(req,"multipart/form-data");
    CkHttpRequest_putPath(req,"/1.1/media/upload.json");

    CkHttpRequest_AddHeader(req,"Expect","100-continue");

    // Add a JPEG image file to the upload.
    fac = CkFileAccess_Create();
    jpgBytes = CkByteData_Create();
    success = CkFileAccess_ReadEntireFile(fac,"qa_data/jpg/starfish.jpg",jpgBytes);
    CkHttpRequest_AddBytesForUpload(req,"media","starfish.jpg",jpgBytes);

    resp = CkHttp_SynchronousRequest(http,"upload.twitter.com",443,TRUE,req);
    if (CkHttp_getLastMethodSuccess(http) != TRUE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkJsonObject_Dispose(jsonToken);
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkFileAccess_Dispose(fac);
        CkByteData_Dispose(jpgBytes);
        return;
    }

    jsonResponse = CkJsonObject_Create();
    CkJsonObject_putEmitCompact(jsonResponse,FALSE);
    CkJsonObject_Load(jsonResponse,CkHttpResponse_bodyStr(resp));

    if (CkHttpResponse_getStatusCode(resp) != 200) {
        printf("%s\n",CkJsonObject_emit(jsonResponse));
        CkJsonObject_Dispose(jsonToken);
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkFileAccess_Dispose(fac);
        CkByteData_Dispose(jpgBytes);
        CkJsonObject_Dispose(jsonResponse);
        return;
    }

    CkHttpResponse_Dispose(resp);

    // Show the successful response:
    printf("%s\n",CkJsonObject_emit(jsonResponse));
    printf("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:
    printf("media_id_string = %s\n",CkJsonObject_stringOf(jsonResponse,"media_id_string"));
    printf("size = %d\n",CkJsonObject_IntOf(jsonResponse,"size"));
    printf("image_type = %s\n",CkJsonObject_stringOf(jsonResponse,"image.image_type"));
    printf("height/width = %d,%d\n",CkJsonObject_IntOf(jsonResponse,"image.w"),CkJsonObject_IntOf(jsonResponse,"image.h"));


    CkJsonObject_Dispose(jsonToken);
    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkFileAccess_Dispose(fac);
    CkByteData_Dispose(jpgBytes);
    CkJsonObject_Dispose(jsonResponse);

    }