我黑掉了 @syme 在 "https://dev59.com/smQn5IYBdhLWcg3wr406#24342101" 给出的示例,并创建了一行代码的REST服务器。虽然有些标头缺失,但它可以正确处理HTTP GET和未实现资源的404。
rm -f out ; mkfifo out ; trap "rm -f out" EXIT ; while true ; do cat out | nc -l 1500 > >(export REQUEST= ; while read line ; do line=$(echo "$line" | tr -d '[\r\n]') ; if echo "$line" | grep -qE '^GET /' ; then REQUEST=$(echo "$line" | cut -d ' ' -f2) ; elif [ "x$line" = x ] ; then HTTP_200="HTTP/1.1 200 OK" ; HTTP_LOCATION="Location:" ; HTTP_404="HTTP/1.1 404 Not Found" ; if echo $REQUEST | grep -qE '^/echo/' ; then printf "%s\n%s %s\n\n%s\n" "$HTTP_200" "$HTTP_LOCATION" $REQUEST ${REQUEST#"/echo/"} > out ; elif echo $REQUEST | grep -qE '^/date' ; then date > out ; elif echo $REQUEST | grep -qE '^/stats' ; then vmstat -S M > out ; elif echo $REQUEST | grep -qE '^/net' ; then ifconfig > out ; else printf "%s\n%s %s\n\n%s\n" "$HTTP_404" "$HTTP_LOCATION" $REQUEST "Resource $REQUEST NOT FOUND!" > out ; fi ; fi ; done) ; done
格式化版本位于https://gist.github.com/marcellodesales/9e4288f35ac2cc3e1b83#file-formatted
上述API实现了以下功能:
返回给定的{name}
$ curl -i http://localhost:1500/echo/marcello
HTTP/1.1 200 OK
Location: /echo/marcello
marcello
返回服务器的日期
$ curl -i http://localhost:1500/date
Sun Oct 19 14:12:27 PDT 2014
返回服务器的统计信息
$ curl -i http://localhost:1500/stats
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 11 374 383 2198 0 0 6 22 33 8 2 2 97 0 0
显示服务器的网络
$ curl -i http://localhost:1500/net
docker0 Link encap:Ethernet HWaddr 56:84:7a:fe:97:99
inet addr:172.17.42.1 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::5484:7aff:fefe:9799/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:120694 errors:0 dropped:0 overruns:0 frame:0
TX packets:141757 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:272911625 (272.9 MB) TX bytes:289945068 (289.9 MB)
eth0 Link encap:Ethernet HWaddr 00:0c:29:1f:d3:b5
inet addr:192.168.248.206 Bcast:192.168.248.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe1f:d3b5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2322493 errors:0 dropped:0 overruns:0 frame:0
TX packets:1098965 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2367412677 (2.3 GB) TX bytes:700548644 (700.5 MB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:151566 errors:0 dropped:0 overruns:0 frame:0
TX packets:151566 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:305833574 (305.8 MB) TX bytes:305833574 (305.8 MB)
对于服务器未实现的任何内容,都会打印404消息。
$ curl -i http://localhost:1500/wrong
HTTP/1.1 404 Not Found
Location: /wrong
Resource /wrong NOT FOUND!
这是来自上面GIST的格式化解决方案。您可以将其保存为"web.sh"并运行:)
rm -f out
mkfifo out
trap "rm -f out" EXIT
while true
do
cat out | nc -l -p 1500 -q 1 > >(
export REQUEST=
while read line
do
line=$(echo "$line" | tr -d '[\r\n]')
if echo "$line" | grep -qE '^GET /'
then
REQUEST=$(echo "$line" | cut -d ' ' -f2)
elif [ "x$line" = x ]
then
HTTP_200="HTTP/1.1 200 OK"
HTTP_LOCATION="Location:"
HTTP_404="HTTP/1.1 404 Not Found"
if echo $REQUEST | grep -qE '^/echo/'
then
printf "%s\n%s %s\n\n%s\n" "$HTTP_200" "$HTTP_LOCATION" $REQUEST ${REQUEST#"/echo/"} > out
elif echo $REQUEST | grep -qE '^/date'
then
date > out
elif echo $REQUEST | grep -qE '^/stats'
then
vmstat -S M > out
elif echo $REQUEST | grep -qE '^/net'
then
ifconfig > out
else
printf "%s\n%s %s\n\n%s\n" "$HTTP_404" "$HTTP_LOCATION" $REQUEST "Resource $REQUEST NOT FOUND!" > out
fi
fi
done
)
done