Question

我正在尝试在我用PHP创建的应用程序和Node.JS之间建立一个桥梁。

Node.JS创建套接字并监听它，我的代码：

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 );
});

我的PHP代码只是连接存在套接字并发送一些数据：

$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.
}

一切都应该有效，但在Node.JS控制台中，我看到了响应：

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

在PHP中，我只看到第一条消息hello。为什么以及如何解决这个问题？

Answer 1

试试这个;

<?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.
}
?>

Answer 2

我知道问题出在哪里。在PHP中，我在写入数据后关闭与管道的连接。 Node尝试编写响应但不能，因为PHP中的连接已经关闭。所以，我刚刚添加检查是连接还在。当然，下面的内容不是用于制作，只是为了说明它是如何工作的。

Node.JS代码：

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 );
});

在PHP中：

$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);
}

Node.JS和PHP之间通过UNIX套接字连接 - EPIPE写入错误

2 个答案: