Nasal-Interpreter/tools/fgfs_props_getter.nas

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# used to get property tree from fgfs by httpd
# use --httpd=5500 to start fgfs
# and use this script to get property tree
# 2023/11/06 ValKmjolnir
use module.libsock;
use std.json;
var new_getter = func(hostname, port) {
var socket = libsock.socket;
var sd = socket.socket(
socket.AF_INET,
socket.SOCK_STREAM,
socket.IPPROTO_TCP
);
while((var err = socket.connect(sd, hostname, port))==socket.SOCKET_ERROR) {
println(
"[", os.time(), "] connect to ",
hostname, ":", port, " failed: ",
socket.errno()
);
unix.sleep(1);
}
println("[", os.time(), "] connect to ", hostname, ":", port, " succeeded");
var getprop = func(path) {
var header = "GET /json"~path~" HTTP/1.1\n\r\n";
var res = socket.send(sd, header);
var message = socket.recv(sd, 1024);
var total_source = message.str;
while(message.size!=0) {
message = socket.recv(sd, 1024);
total_source ~= message.str;
}
var begin_position = find("{", total_source);
var end_position = find("0\r\n\r\n", total_source);
var props = substr(total_source, begin_position, end_position-begin_position);
props = json.parse(props);
json.check_error();
if (size(props)==0) {
println("getprop: node \"", path, "\" not found");
}
return props;
}
var close = func {
socket.closesocket(sd);
}
return {
getprop: getprop,
close: close
};
}
var dump = func(tree, indent = "") {
if (size(tree)==0) {
return;
}
println(indent, "---------");
println(indent, "path : \"", tree.path, "\"");
println(indent, "name : \"", tree.name, "\"");
println(indent, "index : \"", tree.index, "\"");
println(indent, "type : \"", tree.type, "\"");
println(indent, "nChildren : \"", tree.nChildren, "\"");
println(indent, "---------");
if (contains(tree, "children")) {
println(indent, "children :");
foreach(var i; tree.children) {
dump(i, indent~" ");
}
}
}
if (size(arg)<2) {
println("require hostname and port");
exit(-1);
}
if (size(arg)>2) {
println("too many arguments, only require hostname and port");
exit(-1);
}
var getter = new_getter(arg[0], num(arg[1]));
var get_props = func(path = "/") {
var props = getter.getprop(path);
dump(props);
}
get_props();
get_props("/e-tron/dialog/config");
get_props("/e-tron/dialog/config/a");
getter.close();