Problem using webwrite to send image through a simple REST API

I was trying to do image classification through a web at service at https://cloudsight.readme.io/v1.0/docs and I had no problem to use curl to retrieve token:

curl -i -X POST -H "Authorization:MY Key" \
-F "image_request[image]=@/path/to/myimage" \
-F "image_request[locale]=en-US" \
https://api.cloudsightapi.com/image_requests

However, it was not successful when I tried webwrite, it returned "HTTP 400" error.

option=weboptions('KeyName','Authorization','KeyValue','mykey')
fid = fopen('/path/to/myimage');
img  = fread(fid,Inf,'*uint8');
fclose(fid);
response=webwrite('https://api.cloudsightapi.com/image_requests',...
    'image_request[image]',img,...
    'image_request[locale]','en-US',option);

I guess it because the function webwrite in this format doesn't support "multipart/form-data" and I need change the media type. Then I tried send data as an JSON object

option=weboptions('KeyName','Authorization','KeyValue','mykey',...
'MediaType','application/json')
data=struct('image_request[image]',im,'image_request[locale]','en-US');
response=webwrite('https://api.cloudsightapi.com/image_requests',data,option)

But the field name in Matlab struct does not allow "[". Any suggestion?

Answer 1

[Vinod]

Here's an example that uploads any file from MATLAB to DropBox programmatically:

http://www.mathworks.com/matlabcentral/fileexchange/59673

Hopefully you can modify this example for your needs

[Abolfazl Nejatian]

Dear Vinod,

I have the same question.

I need to send some photos to the Telegram API.

I have tried what you said about the example, unfortunately, it doesn't help me.

here is the document of telegram for sending photos,

https://core.telegram.org/bots/api#sendphoto

and here is the python example of my goal

import requests
import json

bot_token = 'BOT TOKEN'
chat_id = "CHAT ID"
file = r"C:\Users\name\OneDrive\Desktop\Capture.PNG"

files = {
    'photo': open(file, 'rb')
}

message = ('https://api.telegram.org/bot'+ bot_token + '/sendPhoto?chat_id=' 
           + chat_id)
send = requests.post(message, files = files)

if you could reform this python code to the matlab, I will appreciate your help.

thank in advance for your time

[seyed hamze]

this is my question too. I search very much but they dont help me at all. I can send text to telegram but I cant send any photo from my computer to telegram bot.

I use tgprint() to send photo but it doesnt work.

Can anyone help me??????????????????????????????????????