今天我遇到了这种奇怪的行为,我找不到原因。我正在使用MacOS Sierra。
我有这个代码(Express):
app.server.listen(config.port, config.address, function () {
logger.info('app is listening on', config.address + ':' + config.port);
});
打印
app is listening on 127.0.0.1:5000
但是,如果我尝试curl
,它就会失败。
$ curl http://localhost:5000/api/ping
curl: (56) Recv failure: Connection reset by peer
我检查了我的主机文件:
$ cat /etc/hosts
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
所以我ping localhost以确保它解析为127.0.0.1
:
$ ping localhost
PING localhost (127.0.0.1): 56 data bytes
64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.061 ms
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.126 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.135 ms
^C
--- localhost ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.061/0.107/0.135/0.033 ms
我再试一次,但它失败了
$ curl http://localhost:5000/api/ping
curl: (56) Recv failure: Connection reset by peer
现在我尝试使用127.0.0.1
而瞧,它有效吗?
$ curl http://127.0.0.1:5000/api/ping
pong
怎么了?
答案 0 :(得分:2)
cURL正在尝试通过IPv6进行连接,但您的Express服务器正在侦听127.0.0.1这是IPv4。
您可以强制cURL通过IPv4与-4
选项进行连接。
curl -4 http://127.0.0.1:5000/api/ping