node.js - 莫名其妙的 node.js http 抛出连接 ECONNREFUSED(IPv6？)

Question

我正在运行 node.js 如下:

> http = require('http')
> http.get('http://myhost.local:8080',
    function (res) { console.log("RES" + res) }
  ).on('error', function (e) { console.log("Error:", e) })

> uri = require('url').parse("http://myhost.local:8080")
{ protocol: 'http:',
  slashes: true,
  auth: null,
  host: 'myhost.local:8080',
  port: '8080',
  hostname: 'myhost.local',
  hash: null,
  search: null,
  query: null,
  pathname: '/',
  path: '/',
  href: 'http://myhost.local:8080/' }
> http.get(uri,
    function (res) { console.log("RES" + res) }
  ).on('error', function (e) { console.log("Error:", e) })

隐式和显式解析的 URI 都抛出错误，我得到以下输出:

Error: { [Error: connect ECONNREFUSED] code: 'ECONNREFUSED', errno: 'ECONNREFUSED', syscall: 'connect' }

主机 myhost.local 是 /etc/hosts 中 localhost 的别名，是:

127.0.0.1   localhost myhost.local myhost
255.255.255.255 broadcasthost
::1             localhost myhost.local myhost
fe80::1%lo0 localhost myhost.local myhost

编辑:我几乎尝试了主机文件的所有排列，包括最明显的排列:

127.0.0.1   localhost 
255.255.255.255 broadcasthost
::1             localhost myhost.local myhost
fe80::1%lo0 localhost

编辑 我还应该提一下，我现在已经在不止一台 Mac 上尝试过了。

虽然这似乎是一个相当常见的错误，但我没有看到任何有用的解释或解决方法。以下是一些值得注意的相关事实:

1. 运行 $ wget http://myhost.local:8080 会按预期工作，因此这不是防火墙问题。
2. 运行 $ telnet myhost.local 8080 然后手动获取 url 工作正常，所以这不是一个奇怪的 HTTP 问题。
3. 我可以轻松使用 node.js 连接到其他主机，例如http://www.google.com

我希望有用的系统信息包括:

$ node -v
v0.9.11

$ uname -a
Darwin myhost.local 12.2.1 Darwin Kernel Version 12.2.1:
Thu Oct 18 12:13:47 PDT 2012; root:xnu-2050.20.9~1/RELEASE_X86_64 x86_64

$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.8.2
BuildVersion:   12C3104

$ sudo  netstat -nalt | grep LISTEN | grep 8080
tcp6       0      0  ::1.8080  *.*    LISTEN

有没有人知道这里发生了什么，以及可能的修复方法是什么？

Answer 1

我会在这里发布这个以防其他人遇到问题。

Bert Belder，Node.js 邮件列表:

On your system "myhost.local" resolves to three different addresses (127.0.0.1, ::1, and fe80::1). Node prefers ipv4 over ipv6 so it'll try to connect to 127.0.0.1. Nothing is listening on 127.0.0.1:8080 so the connect() syscall fails with ECONNREFUSED. Node doesn't retry with any of the other resolved IPs - it just reports the error to you. A simple solution would be to replace 'localhost' by the intended destination ip address, '::1'.

Whether this behavior is right is somewhat open for debate, but this is what causes it.

Bert