Connection between Node.JS and PHP via UNIX Socket - EPIPE write error

问题:

I'm trying to create a bridge between my application created in PHP and Node.JS.

Node.JS creates socket and listening to it, my code:

var net = require('net'),     fs = require('fs'); var path = '/tmp/echo.sock';  fs.unlink(path, function () {   var server = net.createServer(function(c) {      console.log('server connected');      c.on('close', function() {       console.log('server disconnected');     });     c.write('hello\r\n');      c.on('data', function(data) {         console.log('Response: "' + data + '"');         c.write('You said "' + data + '"');     });    });   server.listen(path, function(e) {     console.log('server bound on %s', path);   }); });  process.on('uncaughtException', function (err) {     console.log( "UNCAUGHT EXCEPTION " );     console.log( "[Inside 'uncaughtException' event] " + err.stack || err.message ); }); 

And my PHP code just connecting with exists socket and send some data:

$fp = fsockopen("unix:///tmp/echo.sock", -1, $errno, $errstr); if (!$fp) {    return "ERROR: $errno - $errstr<br />\n"; } else {    fwrite($fp, "Hello World <3");    $out = fread($fp, 8192);    fclose($fp);    return $out; // That code is in function. } 

Everything should working, but in Node.JS console I see response:

server bound on /tmp/echo.sock server connected Response: "Hello World <3" UNCAUGHT EXCEPTION [Inside 'uncaughtException' event] Error: write EPIPE     at exports._errnoException (util.js:745:11)     at Object.afterWrite (net.js:763:14) server disconnected 

And in PHP I see just first message, hello. Why and how can I fix that?

回答1:

try this;

<?php $fp = fsockopen("unix:///tmp/echo.sock", -1, $errno, $errstr); if (!$fp) {    return "ERROR: $errno - $errstr<br />\n"; } else {    $out = fread($fp, 8192);    fwrite($fp, "Hello World <3");    $out2 = fread($fp, 8192);    fclose($fp);    echo  $out; // That code is in function.    echo  $out2; // That code is in function. } ?> 

回答2:

I know where's the problem. In PHP I close the connection to the pipe after write data. Node tries to write response but it can't, because connection in PHP is already closed. So, I just added checking is the connection still up. Of course, this below is not used in production, but just to show how it works.

Node.JS Code:

var net = require('net'),     fs = require('fs'); var path = '/tmp/echo.sock',     toSend = 1,     sended = 0;  fs.unlink(path, function () {   var server = net.createServer(function(c) {      console.log('server connected');      c.on('close', function() {       console.log('server disconnected');     });     c.write('hello\r\n');      c.on('data', function(data) {         console.log('Response: "' + data + '"');          if( data == "IS_ALREADY_CLOSED" & toSend == sended ) {            c.write('ALREADY_CLOSED');                 return;         } else {            c.write('NOT_ALREADY_CLOSED');            return;         }           c.write('You said "' + data + '"');          sended++;     });    });   server.listen(path, function(e) {     console.log('server bound on %s', path);   }); });  process.on('uncaughtException', function (err) {     console.log( "UNCAUGHT EXCEPTION " );     console.log( "[Inside 'uncaughtException' event] " + err.stack || err.message ); }); 

And in PHP:

$fp = fsockopen("unix:///tmp/echo.sock", -1, $errno, $errstr); if (!$fp) {    return "ERROR: $errno - $errstr<br />\n"; } else {    fwrite($fp, "Hello World <3");     do {        $output = fread($fp, 8192);        if($output == "ALREADY_CLOSED") break;        elseif( $output == "NOT_ALREADY_CLOSED" ) continue;         echo $output . "\n";        fwrite($fp, "IS_ALREADY_CLOSED");    } while(true);     fclose($fp); } 

文章来源: Connection between Node.JS and PHP via UNIX Socket - EPIPE write error