Improve bash implementation

examples/client_bash_auth.sh

@@ -1,12 +1,12 @@
 #!/bin/bash
 
-# login and store cookies in 'cookies.txt'
-curl 'http://localhost/api.php/' --data "username=admin&password=admin" --cookie-jar cookies.txt --silent >/dev/null
+# login and store cookies in 'cookies.txt' AND retrieve the value of the XSRF token
+TOKEN=`curl 'http://localhost/api.php/' --data "username=admin&password=admin" --cookie-jar cookies.txt`
 
-# retrieve the value of the 'XSRF-TOKEN' cookie
-TOKEN=`cat cookies.txt|grep XSRF-TOKEN|cut -f 7`
+# strip the double quotes from the variable (JSON decode)
+TOKEN=${TOKEN//\"/}
 
-# set the 'XSRF-TOKEN' as the 'X-XSRF-Token' header AND send the cookies to the server
+# set the XSRF token as the 'X-XSRF-Token' header AND send the cookies to the server
 curl 'http://localhost/api.php/posts?include=categories,tags,comments&filter=id,eq,1' --header "X-XSRF-Token: $TOKEN" --cookie cookies.txt
 
 # clean up