Linux Troubleshooting and scripts @lemmy.zip freamon @feddit.nl 1 yr. ago

Basic Lemmy API login script

#!/bin/bash

# Basic login script for Lemmy API

# CHANGE THESE VALUES
my_instance=""			# e.g. https://feddit.nl
my_username=""			# e.g. freamon
my_password=""			# e.g. hunter2

########################################################

# Lemmy API version
API="api/v3"

########################################################

# Turn off history substitution (avoid errors with ! usage)
set +H

########################################################

# Login
login() {
	end_point="user/login"
	json_data="{\"username_or_email\":\"$my_username\",\"password\":\"$my_password\"}"

	url="$my_instance/$API/$end_point"

	curl -H "Content-Type: application/json" -d "$json_data" "$url"
}

login

# Make note of "jwt" from reply

This'll reply with JSON data, that includes a value for "jwt", to be used in other scripts that require you to be logged in.

Personally, I'd use the 'jq' program to de-serialize the JSON data, but I thought I'd keep the script simple for now

5 comments

Great. Now how would I make a post? Is there an API endpoint list somewhere?

I wanted to schedule my community posts, and tried to use this: https://github.com/RikudouSage/LemmySchedule but it doesn't actually make posts for me. If I could use stuff like the above I could crontab it all out.

EDIT: Hmmm, looks like I found it https://join-lemmy.org/api/interfaces/CreatePost.html Now to test and figure it all out.
- Hi. I've found the best place to test the api is here
  
  Example script for making a post
  
  my_instance="https://lemm.ee" auth="YOUR-JWT" community_id=COMMUNITY-ID name="TITLE OF POST" body="BODY OF POST" API="api/v3" create() { end_point="post" json_data="{\"auth\":\"$auth\",\"community_id\":$community_id,\"name\":\"$name\",\"body\":\"$body\"}" url="$my_instance/$API/$end_point" curl -H "Content-Type: application/json" -d "$json_data" "$url" } create
  
  You'll need to get your instance's community.id for the community you want to post to. To use this community as an example, it would be:
  
  my_instance="https://lemm.ee" API="api/v3" resolve() { end_point="resolve_object" www_data="q=https://lemmy.zip/c/linuxscripts" url="$my_instance/$API/$end_point?$www_data" curl "$url" } resolve
  
  (lemmy will probably sanitise the ampersand in that query, so you'll have to replace the HTML with a literal ampersand)
  
  Awesome, thanks a bunch. I'm working through this now as I have minutes to spare, but the community id thing is returning "Query deserialize error: missing field q". I'm wondering if special characters and stuff are being parsed. I also replaced auth= in line 3 with jwt=, just FYI. Thanks, I'll keep plugging.