Run a script to log in to WiFi upon connect

Question

My school network have a captive portal. Using Google Chrome's "copy as cURL" seems to log me in using curl, but I want to automate this process so it happens as soon as the mac connects to Wi-Fi. How would I achieve that? The curl command is as follows:

curl 'http://1.1.1.3/ac_portal/login.php' -H 'Connection: keep-alive' -H 'Accept: */*' -H 'Origin: http://1.1.1.3' -H 'X-Requested-With: XMLHttpRequest' -H 'User-Agent: Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Mobile Safari/537.36' -H 'DNT: 1' -H 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8' -H 'Referer: http://1.1.1.3/ac_portal/20171018144956/pc.html?template=20171018144956&tabs=pwd&vlanid=0&url=http://www.gstatic.com/generate_204' -H 'Accept-Encoding: gzip, deflate' -H 'Accept-Language: zh' -H 'Cookie: ac_login_info=passwork; Sessionid=3566675246-1' --data 'opr=pwdLogin&userName=student&pwd=password&rememberPwd=1' --compressed --insecure

The network name is SCLSCHOOL_G, SCLSCHOOL_F, and SCLSCHOOL_H.

Answer 1

There’s nothing that allows you to kick off a script when you attach to a particular network, so you’ll have to use two tools

• launchctl You’ll have to start the job based on network availability. Unfortunately, this only checks to see if you’re connected to any network, not a specific one.

• networksetup that gets the current SSID you’re attached to. The command you will need is

  networksetup -listpreferredwirelessnetworks en1 | grep ${SSID} | cut -f2
  

Then in a bash script, compare the output of that command and if it matches the SSID you want, run the curl command.

Answer 2

You can also put it as a script for all apps and use Script Editor's menu bar button which sits close to Wi-Fi button. ~/Library/Scripts is the folder where the scripts are accessible to all apps.

https://apple.stackexchange.com/a/373438/313842

Answer 3

In the end, I used DSSW Power Manager to automate this process. I execute the curl command when I wake the macbook pro, and power off the Wifi when I sleep the macbook pro (in case it connects automatically), and specified the time range to be the time I'm in school. If anyone has the same problem and sometimes can't log in to the Wifi on first connect (curl will return error 7), my (fish) script is below:

while <curl command> 2>&1| grep \(7\) ; networksetup -setairportpower en0 on ; <curl command>; echo ; sleep 0.1 ; end