# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1679951949 -7200
# Node ID 4ed65a6c2a6aeae8c932694d01d61548ddaebeb7
# Parent  eb482defd9b0bc9f9dfe2096e0b852f4aebcd562
mod_rest: Add an example bash script for using mod_rest

Also supports --login with mod_http_oauth2

diff -r eb482defd9b0 -r 4ed65a6c2a6a mod_rest/example/rest.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_rest/example/rest.sh	Mon Mar 27 23:19:09 2023 +0200
@@ -0,0 +1,105 @@
+#!/bin/bash -eu
+
+# Copyright (c) Kim Alvefur
+# This file is MIT/X11 licensed.
+
+# Settings
+HOST=""
+DOMAIN=""
+
+AUTH_METHOD="session-read-only"
+AUTH_ID="rest"
+
+if [ -f "${XDG_CONFIG_HOME:-$HOME/.config}/restrc" ]; then
+	# Config file can contain the above settings
+	source "${XDG_CONFIG_HOME:-$HOME/.config}/restrc"
+fi
+	
+if [[ $# == 0 ]]; then
+	echo "${0##*/} [-h HOST] [-u USER|--login] [/path] kind=(message|presence|iq) ...."
+	# Last arguments are handed to HTTPie, so refer to its docs for further details
+	exit 0
+fi
+
+if [[ "$1" == "-h" ]]; then
+	HOST="$2"
+	shift 2
+elif [ -z "${HOST:-}" ]; then
+	HOST="$(hostname)"
+fi
+
+if [[ "$HOST" != *.* ]]; then
+	# Assumes subdomain of your DOMAIN
+	if [ -z "${DOMAIN:-}" ]; then
+		DOMAIN="$(hostname -d)"
+	fi
+	if [[ "$HOST" == *:* ]]; then
+		HOST="${HOST%:*}.$DOMAIN:${HOST#*:}"
+	else
+		HOST="$HOST.$DOMAIN"
+	fi
+fi
+
+if [[ "$1" == "-u" ]]; then
+	# -u username
+	AUTH_METHOD="auth"
+	AUTH_ID="$2"
+	shift 2
+elif [[ "$1" == "-rw" ]]; then
+	# To e.g. save Accept headers to the session
+	AUTH_METHOD="session"
+	shift 1
+fi
+
+if [[ "$1" == "--login" ]]; then
+	shift 1
+
+	# Check cache for OAuth client
+	if [ -f "${XDG_CACHE_HOME:-$HOME/.cache}/rest/$HOST" ]; then
+		source "${XDG_CACHE_HOME:-$HOME/.cache}/rest/$HOST" 
+	fi
+
+	OAUTH_META="$(http --check-status --json "https://$HOST/.well-known/oauth-authorization-server" Accept:application/json)"
+	AUTHORIZATION_ENDPOINT="$(echo "$OAUTH_META" | jq -e -r '.authorization_endpoint')"
+	if [ -z "${OAUTH_CLIENT_INFO:-}" ]; then
+		# Register a new OAuth client
+		REGISTRATION_ENDPOINT="$(echo "$OAUTH_META" | jq -e -r '.registration_endpoint')"
+		OAUTH_CLIENT_INFO="$(http --check-status "$REGISTRATION_ENDPOINT" Content-Type:application/json Accept:application/json client_name=rest client_uri="https://www.zash.se/rest-script.html" redirect_uris:='["urn:ietf:wg:oauth:2.0:oob"]')"
+		mkdir -p "${XDG_CACHE_HOME:-$HOME/.cache}/rest/"
+		typeset -p OAUTH_CLIENT_INFO >> "${XDG_CACHE_HOME:-$HOME/.cache}/rest/$HOST"
+	fi
+
+	CLIENT_ID="$(echo "$OAUTH_CLIENT_INFO" | jq -e -r '.client_id')"
+	CLIENT_SECRET="$(echo "$OAUTH_CLIENT_INFO" | jq -e -r '.client_secret')"
+
+	open "$AUTHORIZATION_ENDPOINT?response_type=code&client_id=$CLIENT_ID&scope=openid+prosody:user"
+	read -p "Paste authorization code: " -s -r AUTHORIZATION_CODE
+
+	TOKEN_ENDPOINT="$(echo "$OAUTH_META" | jq -e -r '.token_endpoint')"
+	TOKEN="$(http --check-status --form "$TOKEN_ENDPOINT" 'grant_type=authorization_code' "client_id=$CLIENT_ID" "client_secret=$CLIENT_SECRET" "code=$AUTHORIZATION_CODE" | jq -e -r '.access_token')"
+
+	USERINFO_ENDPOINT="$(echo "$OAUTH_META" | jq -e -r '.userinfo_endpoint')"
+
+	if [ -n "${COLORTERM:-}" ]; then
+		echo -ne '\e[1K\e[G'
+	else
+		echo
+	fi
+	http --check-status -b --session rest "$USERINFO_ENDPOINT" "Authorization:Bearer $TOKEN" Accept:application/json >&2
+	AUTH_METHOD="session-read-only"
+	AUTH_ID="rest"
+fi
+
+if [[ $# == 0 ]]; then
+	# Just login?
+	exit 0
+fi
+
+# For e.g /disco/example.com and such GET queries
+GET_PATH=""
+if [[ "$1" == /* ]]; then
+	GET_PATH="$1"
+	shift 1
+fi
+
+http --check-status -p b "--$AUTH_METHOD" "$AUTH_ID" "https://$HOST/rest$GET_PATH" "$@"