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#!/bin/bash | |
# vim: tabstop=4 | |
GRANT_TYPE='client_credentials' | |
############### Functions ############### | |
parse_json() { | |
local input=$1 | |
local attr=$2 | |
python -c "import json;obj=json.loads('$input');print(obj['$attr'])" 2>/dev/null | |
} | |
############### Arguments ############### | |
usage() { | |
cat <<-EOF | |
Damn simple script to requests access token from OAuth 2.0 authorization server. | |
Usage: ${scriptname} <options> | |
Options: | |
-c, --client-id CLIENT_ID | |
-p, --client-secret SECRET | |
-s, --scope SCOPE... | |
-u, --oaas-uri URI | |
-v, --verbose | |
-h, --help | |
EOF | |
} | |
scriptname=$(basename $0) | |
client= | |
secret= | |
scope=() | |
oaas_uri='https://auth.fit.cvut.cz' | |
verbosity='silent' | |
while [ $# -gt 0 ]; do | |
case $1 | |
in | |
-c | --client-id) | |
client=$2 | |
shift 2 | |
;; | |
-h | --help) | |
usage | |
exit 0 | |
;; | |
-p | --client-secret) | |
secret=$2 | |
shift 2 | |
;; | |
-s | --scope) | |
scope+=("$2") | |
shift 2 | |
;; | |
-u | --oaas-uri) | |
oaas_uri=$2 | |
shift 2 | |
;; | |
-v | --verbose) | |
verbosity='verbose' | |
shift 1 | |
;; | |
*) | |
echo "${scriptname}: Unknown option $1" >&2 | |
echo; usage | |
exit 1 | |
;; | |
esac | |
done | |
if [[ -z "$client" || -z "$secret" ]]; then | |
echo "${scriptname}: Missing CLIENT_ID or SECRET" >&2 | |
echo; usage | |
exit 1 | |
fi | |
############### Main ############### | |
data="grant_type=${GRANT_TYPE}" | |
if [ -n "$scope" ]; then | |
data+="&scope=${scope[@]}" | |
fi | |
curl_opts=" | |
--data "$data" \ | |
--header 'Content-Type: application/x-www-form-urlencoded' \ | |
--user ${client}:${secret} \ | |
--$verbosity" | |
response=$(curl $curl_opts "${oaas_uri}/oauth/oauth/token") | |
token=$(parse_json "$response" 'access_token') | |
if [ $? -eq 0 ]; then | |
echo $token | |
else | |
echo "Failed with response: $response" >&2 | |
exit 2 | |
fi |
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