I am running a normal TCP socket in javascript and uses node to execute. Before I send a response back to the client, I want to validate the data with some some php (mysql) code. How can I execute this code inside this javascript file? All similar questions in STACKOVERFLOW asks about this code in HTML. (which is okay and I understand that part), But this is a normal javascript file (executed in node). The javascript code is below and I've marked the validation function call.
var net = require('net');
var HOST = '192.168.0.6';
var PORT = 8765;
net.createServer(function(sock) {
console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort);
sock.on('data', function(data) {
var output;
var validScan;
//This is the function call to a php file
**validScan = validateScanTag(data);**
console.log('DATA ' + sock.remoteAddress + ': ' + data);
sock.write(validScan);
});
// Closing this instance of socket
sock.on('close', function(data) {
console.log('CLOSED: ' + sock.remoteAddress +' '+ sock.remotePort);
});
}).listen(PORT, HOST);
console.log('Server listening on ' + HOST +':'+ PORT);
The validateScanTag executes a line lke :
$.post('getperiod.php', {hours:hrs, minutes:mins, seconds:secs, ddd:day},
But this dont work. How can I call this 'geteriod.php' file from a javascript file?
I'm pretty sure the problem itself is well worth rethinking (for example, port your mysql code from php to node) but here is my solution:
var net = require('net');
var PORT = 8765;
var Lazy=require('lazy');
var spawn = require('child_process').spawn;
// php code runs as a server in external process
var validator = spawn('php', ['validator.php']);
net.createServer(function(sock) {
console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort);
// on 'data' handler is not enough to read input line by line
// you need to buffer data, use some kind of state machine or one of available stream parsers. I use lazy here: npm install lazy
// write each line to php validation code
new Lazy(sock).lines.forEach(function(line) {
console.log('DATA ' + sock.remoteAddress + ': ' + line.toString());
validator.stdin.write(line);
validator.stdin.write('\n');
});
// read validation result line by line from validator process
new Lazy(validator.stdout).lines.forEach(function(line) {
console.log('Validation result:' + line.toString()) // line is Buffer object here, hence toString
});
validator.stdout.pipe(process.stdout);
// Closing this instance of socket
sock.on('close', function() {
console.log('CLOSED');
});
}).listen(PORT);
validator.php should read from stdin and write to stdout
<?
function validatescanTag($l) {
// put your validation code here
return $l . '!!!!';
}
$stdin = fopen('php://stdin', 'r');
do {
$line = fgets($stdin);
print validateScanTag($line);
} while(1);
?>
Another option is to use fastcgi protocol to communicate node <-> php or dnode rpc . Or just use http and run php from nginx/apache (or even node-php )
An approach to give a more generic answer for clarification and "getting you on the boots":
As far as I understand you're trying to run your php script using a http post request invoked by the node.js server.
You probably first have to become aware of the fact that running server-side JavaScript normally has different motivation and possibilities as well as impacts on your architecture than running JS inside a browser - at least in a classical "jQuery sense".
As stated in your comment you expect jQuery to work seamlessly within server-side node.js. That doesn't work as the comment-posted ReferenceError: $ is not defined
shows you. There is no server-side jQuery available in your node.js stack working out-of-the-box (possibilities of using jQuery server-side should be discussed separately and is another subject).
Nevertheless you're obviously looking for a way to re-use your PHP script which already handles your mysql data connection and handling by utilizing it server-side . Doing this using http there are possibilites like shown in this stackoverflow post or in the http.request section of the node.js documentation . If your php script resides on the same server (or better runtime environment) as your node.js is running you may also directly execute the php script it by spawning it as a child process with the php standalone (command line) utility.
Last but not least: Yes, there are some ways (npm modules, ORM layers) for connecting mysql directly with your node.js app. But that's another complex subject and is discussed at other places.
I hope that helped in a way to avoid mixing up things that shouldn't be mixed up.
有一个PHP扩展在PHP中嵌入了Chrome的V8引擎 。
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