Tweeting an image, using URLExecute?

Question

I am trying to tweet an image from Mathematica. I know, this should work on 11, but I am still using 10. My bad.

How I understand that it should work

1. get an authorisation token. Check.

2. Upload an image, JPG format. Initiate the upload (command=INIT):

   "upload...1.1/media/upload.json&command=INIT&total_\
    bytes=" <> bytecount<> "&media_data=<>jpeg<>&media_type=image/jpeg"  
   

   I used ExportToString to convert the jpg in a string format. This gives me the media_id _string

3. Tweet using the obtained media_id _string: "api...statuses/update.json?status=2CV&media_ids=803254834484879360"

Which gives the error:

{"errors":[{"code":324,"message":"Invalid media id 803254834484879360"}]}

Checking with FINALISE suggests "error":"Segments do not add up to provided total file size." i.e. I did not do the base64 encoding and byte count correctly. Which probably is the case, since upload and post using this nice site: http://django-rest-apis.herokuapp.com/media from which i learned it should work.

Anybody any suggestion?

Answer 1

This should work with ServiceConnect.

In[6]:= twitter = ServiceConnect["Twitter"]

Out[6]= ServiceObject["Twitter", 
  "ID" -> "connection-5c77beed5f5bfdf02b1a8074d281a438"]

In[10]:= twitter["Tweet", "Message" -> "Hi Twitter!", 
 "Image" -> Import["ExampleData/spikey.tiff"] ]

Out[10]= "Hi Twitter! https://t.co/YYXZ58lQwJ"

Make sure you use latest paclet.

 In[9]:= PacletInformation["ServiceConnection_Twitter"]

 Out[9]= {"Name" -> "ServiceConnection_Twitter", "Version" ->"11.1.8",.....

 In[11]:= $Version

 Out[11]= "10.4.1 for Mac OS X x86 (64-bit) (April 11, 2016)"