http请求返回508问题总结 -

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http请求返回508问题总结

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互联网

在测试过程中发现网页返回了508.

看到508的第一反应，就是loop detected了。又因为最近有升级过https，所以以为是https的问题呢

最后发现是508是我们运维通过lua脚本返回的值。哎，坑死人呀

运维是通过Nginx+lua来返回错误码和错误信息的

可以看出来没有设置ngx.say(res.content);

所以就会出现 508 Loop Deteced

造成我们找问题的麻烦

附录

使用Nginx+lua返回错误码并且返回自定义内容。

具体查看 https://github.com/openresty/lua-nginx-module/issues/60

写道

"When status >= 200 (ngx.HTTP_OK), it will interrupt the execution of
the current Lua thread and returns status code to nginx.

"When status == 0 (ngx.OK), it will quits the current phase handler
(or content handler if content_by_lua directives are used). "

So the following should work and quit the whole request, though quite
unintuitive:

ngx.status = 410
       ngx.say("this link has expired")
       ngx.exit(ngx.HTTP_OK)

测试结果

写道

curl -v http://localhost:8090/blah.jpg
* About to connect() to localhost port 8090 (#0)
* Trying ::1... Connection refused
* Trying 127.0.0.1... connected
* Connected to localhost (127.0.0.1) port 8090 (#0)
> GET /blah.jpg HTTP/1.1
> User-Agent: curl/7.21.0 (x86_64-pc-linux-gnu) libcurl/7.21.0 OpenSSL/0.9.8o zlib/1.2.3.4 libidn/1.15 libssh2/1.2.5
> Host: localhost:8090
> Accept: */*
>
< HTTP/1.1 410 Gone
< Server: nginx/1.0.6
< Date: Wed, 14 Sep 2018 17:15:57 GMT
< Content-Type: image/jpeg
< Transfer-Encoding: chunked
< Connection: keep-alive
<
this link has expired
<html>
<head><title>404 Not Found</title></head>
<body bgcolor="white">
<center><h1>404 Not Found</h1></center>
<hr><center>nginx/1.0.6</center>
</body>
</html>
* Connection #0 to host localhost left intact
* Closing connection #0