When a user send an image via Telegram bot it there any way to get the image URL? or I just need to save the image somewhere?
In the message array you receive you can find the key photo.
There you will find multiple arrays with the following format
"file_id" : "XXXX",
"file_size" : 1107,
"width" : 90,
"height" : 51
From one of those array you need to take the file_id. You can then request the file_path with a simple get get on the url https://api.telegram.org/bot<token>/getFile?file_id=<file_id>
You will receive an array that looks as following
"ok" : true,
"result" : {
"file_id" : "XXXX",
"file_size" : 27935,
"file_path" : "photo\/file_1.jpg"
}
From the result you need the file_path and you then got the image location https://api.telegram.org/file/bot<token>/<file_path>