B4J Question [Server] How to receive an image with websocket

[dar2o3]

There are examples of how to do it with rest, but do not know how I can do with websocket, any ideas?

 

[Roycefer]

Base64 encode/decode the image. This library will do it on an Android device: https://www.b4x.com/android/forum/threads/base64-encode-decode-image-library.31031/ . You can put together a similar system in B4J using the Encryption library. These links will help you do it in JavaScript:

http://stackoverflow.com/questions/16449445/how-can-i-set-image-source-with-base64
https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding
https://developer.mozilla.org/en-US/docs/Web/HTTP/data_URIs

 

[Erel]

Another option which is better if the images are not small is to use a regular request for the file downloads or uploads.

 

[dar2o3]

If do this

Dim imagene As Future=trimagen.GetProp("src")
Dim image As String =imagene.Value

works correctly.
It is correct? you can do? the images will never weigh more than 100Kb.

He would use the library after Mr. Roycefer

 

[Erel]

No. You need to create a small JavaScript function that converts it to base64 string.

 

[dar2o3]

I get this chain

data:image/jpeg;base64,/9j/4AAQSkZJRgABAgAAZABkAAD/7AARRHVja3kAAQAEAAAAZAAA/+4ADkFkb2JlAGTAAAAAAf/bAIQAAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQICAgICAgICAgICAwMDAwMDAwMDAwEBAQEBAQECAQECAgIBAgIDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMD/8AAEQgA/QC1AwERAAIRAQMRAf/EAJ8AAAEFAQADAQEAAAAAAAAAAAgFBgcJCgQBAgMLAAEBAQEBAQAAAAAAAAAAAAAAAQACAwQQAAICAQMDAwMCBQMCAwYGAwECAwQFERIGACEHMRMIQSIUURVhgTIjCXFCFpEzobEkwfFSYhcY8NHhQyUKcpJEEQACAgIBBAIBBAICAwAAAAAAAREhMQJBUWFxEoGRI...

I think it is the correct format, the problem now is how to save the image on the server with the correct format .jpg

 

[Erel]

Remove this from the string: data:image/jpeg;base64,

Now you can decode it with StringUtils.

 

[dar2o3]

thank you very much put a file of what I've done

 

[dar2o3]

Send an example of everything running, in the example you can not upload images more than 65 Kb, not that this limitation if someone knows and wants to share it.
Thanks for the help.