B4J Question B4J Server - How To Allow Download of Bytes with Authenticated API Call

cklester

Well-Known Member
Licensed User
I've got a B4J server set up and receiving bytes behind an API. The user must be authenticated (an auth token in the header) in order to be able to upload his files. This is working smoothly. The data is received and put in the remote secure database.

How do I then allow that data to be downloaded back to the client? What is the server-side code I need for the B4J server to send that file? I've done a search and didn't find anything about allowing a download from an authentication-required API.
 
Sort by date Sort by votes

cklester

Well-Known Member
Licensed User
I'm going to try sending the data back in Base64 encoding via JSON. Anything wrong with this approach?
 
Upvote 0

Erel

B4X founder
Staff member
Licensed User
Longtime User
1. You can use a simple Filter handler to block unauthenticated requests.

[Server] Login System & Filters Tutorial

Try it online: https://www.b4x.com:51042/login_example/ Note that it is not connected to the forum database. Feel free to test it and register new users. Its only purpose is to demonstrate this solution. Login Example A typical web solution consists of several folders. In this case the...
www.b4x.com

2. If the file is in the www folder then you don't need to do anything. Otherwise you need to do it with:
B4X: 
Dim b() As Byte = File.ReadBytes(...)
resp.OutputStream.WriteBytes(b, 0, b.Length) 'resp is the ServletResponse object.
 
Upvote 0
You must log in or register to reply here.

Similar Threads

K
  • Question
B4J Question [Solved] UDP packet data as objects B4J <> B4R using B4RSerializator
Replies
8
Views
2K
KiloBravo
K
W
  • Question
B4J Question HTTP PostOutputStream ?
Replies
3
Views
805
Erel
  • Question
B4J Question b4j server - how to send a value to server and get a result back
Replies
2
Views
1K
moster67
  • Question
B4J Question sending data using the B4J WebSockets client library and jquery
Replies
3
Views
2K
Erel
  • Article
Share My Creation Command line emailer
Replies
6
Views
2K
JakeBullet70
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…