What Regex Use To Get Network Object From Wpa_supplicant.conf?

I have file with the following structure: ctrl_interface=/data/misc/wifi/sockets driver_param=use_p2p_group_interface=1 update_config=1 device_name=P580_ROW manufacturer=LENOVO mod

Solution 1:

If you do not know the names of attributes and their count, you can make use of a regex based on \G operator:

String str ="<<YOUR_STRING>>";
Pattern ptrn =Pattern.compile("(?<new>network=\\{|(?!^)\\G)\\s*(?<key>\\w+)=\"?(?<value>[^\"\n]+)\"?");
Matcher matcher = ptrn.matcher(str);
int count =1;
while (matcher.find()) {
    if (matcher.group("new") != null && matcher.group("new").length() >0) {
        System.out.println("New Network: "+ count);
        count +=1;
    }
    System.out.println(matcher.group("key") +":\""+ matcher.group("value").trim() +"\"");
}

See IDEONE demo

The regex - (?<new>network=\{|(?!^)\G)\s*(?<key>\w+)="?(?<value>[^"\n]+)"? - matches:

• (?<new>network=\{|(?!^)\G) - network={ or the end of the previous successful match (Group "new")
• \s* - optional whitespace
• (?<key>\w+) - 1 or more alphanumeric symbols (Group "key")
• ="? - literal = and an optional "
• (?<value>[^"\n]+) - 1 or more characters other than " and a newline (Group "value")
• "? - an optional "

Solution 2:

Here is a working example. Try it.

publicclassTest {

    privatestaticfinalStringREGEXP="network=\\{\\n\\s*ssid=\"(?<ssid>.*)\"\\n\\s*psk=\"(?<psk>.*)\"\\n\\s*key_mgmt=(?<keymgmt>.*)\\n\\s*sim_slot=\"(?<simslot>.*)\"\\n\\s*imsi=\"(?<imsi>.*)\"\\n\\s*priority=(?<priority>.*)\\n}";
    privatestaticfinalStringDATA="ctrl_interface=/data/misc/wifi/sockets\n"+"driver_param=use_p2p_group_interface=1\n"+"update_config=1\n"+"device_name=P580_ROW\n"+"manufacturer=LENOVO\n"+"model_name=Lenovo \n"+"model_number=Lenov\n"+"serial_number=hjhjh7\n"+"device_type=10-0050F204-5\n"+"os_version=01020300\n"+"config_methods=physical_display virtual_push_button\n"+"p2p_no_group_iface=1\n"+"\n"+"network={\n"+"    ssid=\"test1\"\n"+"    psk=\"154695\"\n"+"    key_mgmt=WPA-PSK\n"+"    sim_slot=\"-1\"\n"+"    imsi=\"none\"\n"+"    priority=1\n"+"}\n"+"\n"+"network={\n"+"    ssid=\"SSID2\"\n"+"    psk=\"test123456\"\n"+"    key_mgmt=WPA-PSK\n"+"    sim_slot=\"-1\"\n"+"    imsi=\"none\"\n"+"    priority=19\n"+"}";

    publicstatic void main(String[] args){
        finalPattern pattern =Pattern.compile(REGEXP);
        finalMatcher matcher = pattern.matcher(DATA);

        while(matcher.find()){
            System.out.println("New network");
            System.out.println("-----------");
            System.out.println("SSID: "+matcher.group("ssid"));
            System.out.println("PSK: "+matcher.group("psk"));
            System.out.println("KEY MGMT: "+matcher.group("keymgmt"));
            System.out.println("SIM SLOT: "+matcher.group("simslot"));
            System.out.println("IMSI: "+matcher.group("imsi"));
            System.out.println("PRIORITY: "+matcher.group("priority"));
        }
    }
}

I am not efficient in RegExp. I think this method is dirty and there'd be better solutions than this.(WorkSpace: https://regex101.com/r/nA8fD1/1)