小白求解一个rewrite的问题

swustzch · 2017-09-30T16:08:40+00:00

那个你所谓的自行跳转，是指 curl 的那个动作&#x4E48...

小白求解一个rewrite的问题

swustzch

server {

listen 192.168.122.130:80 default;

server_name test;

root html;

index index.html;

location ^~ /testflag/ {

rewrite ^/testflag/(.*)$ /testflag/ break;

}

如上配置的虚拟主机,location内使用了rewrite的break flag,为什么curl http://192.168.122.130/testflag/ 返回500 ? error_log如下:

2017/09/30 09:55:32 [error] 6374#0: *47 rewrite or internal redirection cycle while internally redirecting to "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/ HTTP/1.1", host: "192.168.122.130"

这里为什么会产生循环呢,难道不是应该只rewrite一次然后请求html/testflag/index.html 吗?

求解谢谢

spacewanderlzx

建议开启 debug 等级的 error.log 看一下。
对于配置相关的必现的诡异问题，大部分情况下看 debug 日志会是最快的解决办法之一。

在 2017年9月30日下午4:08， <swu...@gmail.com>写道：

server {
listen 192.168.122.130:80 default;
server_name test;
root html;
index index.html;

location ^~ /testflag/ {
rewrite ^/testflag/(.*)$ /testflag/ break;
}
}
如上配置的虚拟主机,location内使用了rewrite的break flag,为什么curl http://192.168.122.130/testflag/ 返回500 ? error_log如下:
2017/09/30 09:55:32 [error] 6374#0: *47 rewrite or internal redirection cycle while internally redirecting to "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/ HTTP/1.1", host: "192.168.122.130"

这里为什么会产生循环呢,难道不是应该只rewrite一次然后请求html/testflag/index.html 吗?
求解谢谢

--

swustzch

debug如下不是很能看懂只看到产生了内部重定向导致循坏

2017/09/30 12:04:09 [debug] 6991#0: accept on 0.0.0.0:80, ready: 0

2017/09/30 12:04:09 [debug] 6991#0: posix_memalign: 00007FB388B46070:512 @16

2017/09/30 12:04:09 [debug] 6991#0: *73 accept: 192.168.122.130:58644 fd:3

2017/09/30 12:04:09 [debug] 6991#0: *73 event timer add: 3: 60000:1506744309692

2017/09/30 12:04:09 [debug] 6991#0: *73 reusable connection: 1

2017/09/30 12:04:09 [debug] 6991#0: *73 epoll add event: fd:3 op:1 ev:80002001

2017/09/30 12:04:09 [debug] 6991#0: *73 http wait request handler

2017/09/30 12:04:09 [debug] 6991#0: *73 malloc: 00007FB388BAA860:1024

2017/09/30 12:04:09 [debug] 6991#0: *73 recv: eof:0, avail:1

2017/09/30 12:04:09 [debug] 6991#0: *73 recv: fd:3 91 of 1024

2017/09/30 12:04:09 [debug] 6991#0: *73 reusable connection: 0

2017/09/30 12:04:09 [debug] 6991#0: *73 posix_memalign: 00007FB388BF5980:4096 @16

2017/09/30 12:04:09 [debug] 6991#0: *73 http process request line

2017/09/30 12:04:09 [debug] 6991#0: *73 http request line: "GET /testflag/111 HTTP/1.1"

2017/09/30 12:04:09 [debug] 6991#0: *73 http uri: "/testflag/111"

2017/09/30 12:04:09 [debug] 6991#0: *73 http args: ""

2017/09/30 12:04:09 [debug] 6991#0: *73 http exten: ""

2017/09/30 12:04:09 [debug] 6991#0: *73 posix_memalign: 00007FB388C31A80:4096 @16

2017/09/30 12:04:09 [debug] 6991#0: *73 http process request header line

2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "User-Agent: curl/7.29.0"

2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "Host: 192.168.122.130"

2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "Accept: */*"

2017/09/30 12:04:09 [debug] 6991#0: *73 http header done

2017/09/30 12:04:09 [debug] 6991#0: *73 event timer del: 3: 1506744309692

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1

2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"

2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"

2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4

2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"

2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/111", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"

2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"

2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end

2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"

2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5

2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6

2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7

2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8

2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9

2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10

2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11

2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12

2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13

2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"

2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?" =============================这里内部重定向然后就循环了

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1

2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"

2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"

2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4

2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"

2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"

2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"

2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end

2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"

2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5

2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6

2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7

2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8

2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9

2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10

2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11

2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12

2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13

2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"

2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1

2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"

2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"

2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3

2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4

2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"

2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"

2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"

2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end

2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"

2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5

2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6

2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7

2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8

2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9

2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10

2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11

2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12

2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13

2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"

2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"

在 2017年9月30日星期六 UTC+8下午6:49:30，Zexuan Luo写道：

建议开启 debug 等级的 error.log 看一下。
对于配置相关的必现的诡异问题，大部分情况下看 debug 日志会是最快的解决办法之一。

在 2017年9月30日下午4:08， <swus...@gmail.com>写道：
server {
listen 192.168.122.130:80 default;
server_name test;
root html;
index index.html;

location ^~ /testflag/ {
rewrite ^/testflag/(.*)$ /testflag/ break;
}
}
如上配置的虚拟主机,location内使用了rewrite的break flag,为什么curl http://192.168.122.130/testflag/ 返回500 ? error_log如下:
2017/09/30 09:55:32 [error] 6374#0: *47 rewrite or internal redirection cycle while internally redirecting to "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/ HTTP/1.1", host: "192.168.122.130"

这里为什么会产生循环呢,难道不是应该只rewrite一次然后请求html/testflag/index.html 吗?
求解谢谢

--

spacewanderlzx

> 2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"

> 2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"

> =============================这里内部重定向然后就循环了

> 2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0

Good Job。现在能够锁定问题大概是这样的：

1. 访问 html/testflag/index.html 的时候会发生内部重定向，然后重新进入 rewrite 阶段

2. 又匹配到 testflag，接着被 rewrite 到 html/testflag/index.html

3. 跳到第一步，一直循环下去

问题在于，为什么会发生内部重定向呢？参照 debug 日志信息，内部重定向发生的时间不会早于访问 index.html ，所以我们可以先从 index 指令入手。

参照 Nginx 的文档：http://nginx.org/en/docs/http/ngx_http_index_module.html

> It should be noted that using an index file causes an internal redirect

index 会触发一次内部重定向。现在事情很清楚了。

在 2017年9月30日下午7:25， <swu...@gmail.com>写道：

debug如下不是很能看懂只看到产生了内部重定向导致循坏

2017/09/30 12:04:09 [debug] 6991#0: accept on 0.0.0.0:80, ready: 0
2017/09/30 12:04:09 [debug] 6991#0: posix_memalign: 00007FB388B46070:512 @16
2017/09/30 12:04:09 [debug] 6991#0: *73 accept: 192.168.122.130:58644 fd:3
2017/09/30 12:04:09 [debug] 6991#0: *73 event timer add: 3: 60000:1506744309692
2017/09/30 12:04:09 [debug] 6991#0: *73 reusable connection: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 epoll add event: fd:3 op:1 ev:80002001
2017/09/30 12:04:09 [debug] 6991#0: *73 http wait request handler
2017/09/30 12:04:09 [debug] 6991#0: *73 malloc: 00007FB388BAA860:1024
2017/09/30 12:04:09 [debug] 6991#0: *73 recv: eof:0, avail:1
2017/09/30 12:04:09 [debug] 6991#0: *73 recv: fd:3 91 of 1024
2017/09/30 12:04:09 [debug] 6991#0: *73 reusable connection: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 posix_memalign: 00007FB388BF5980:4096 @16
2017/09/30 12:04:09 [debug] 6991#0: *73 http process request line
2017/09/30 12:04:09 [debug] 6991#0: *73 http request line: "GET /testflag/111 HTTP/1.1"
2017/09/30 12:04:09 [debug] 6991#0: *73 http uri: "/testflag/111"
2017/09/30 12:04:09 [debug] 6991#0: *73 http args: ""
2017/09/30 12:04:09 [debug] 6991#0: *73 http exten: ""
2017/09/30 12:04:09 [debug] 6991#0: *73 posix_memalign: 00007FB388C31A80:4096 @16
2017/09/30 12:04:09 [debug] 6991#0: *73 http process request header line
2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "User-Agent: curl/7.29.0"
2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "Host: 192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "Accept: */*"
2017/09/30 12:04:09 [debug] 6991#0: *73 http header done
2017/09/30 12:04:09 [debug] 6991#0: *73 event timer del: 3: 1506744309692
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"
2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/111", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end
2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10
2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11
2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12
2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13
2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?" =============================这里内部重定向然后就循环了
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"
2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end
2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10
2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11
2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12
2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13
2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"
2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end
2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10
2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11
2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12
2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13
2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"

在 2017年9月30日星期六 UTC+8下午6:49:30，Zexuan Luo写道：
建议开启 debug 等级的 error.log 看一下。
对于配置相关的必现的诡异问题，大部分情况下看 debug 日志会是最快的解决办法之一。

在 2017年9月30日下午4:08， <swus...@gmail.com>写道：
server {
listen 192.168.122.130:80 default;
server_name test;
root html;
index index.html;

location ^~ /testflag/ {
rewrite ^/testflag/(.*)$ /testflag/ break;
}
}
如上配置的虚拟主机,location内使用了rewrite的break flag,为什么curl http://192.168.122.130/testflag/ 返回500 ? error_log如下:
2017/09/30 09:55:32 [error] 6374#0: *47 rewrite or internal redirection cycle while internally redirecting to "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/ HTTP/1.1", host: "192.168.122.130"

这里为什么会产生循环呢,难道不是应该只rewrite一次然后请求html/testflag/index.html 吗?
求解谢谢

--

--

swustzch

十分感谢:)

在 2017年9月30日星期六 UTC+8下午8:42:22，Zexuan Luo写道：

> 2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
> 2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"
> =============================这里内部重定向然后就循环了
> 2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0

Good Job。现在能够锁定问题大概是这样的：
1. 访问 html/testflag/index.html 的时候会发生内部重定向，然后重新进入 rewrite 阶段
2. 又匹配到 testflag，接着被 rewrite 到 html/testflag/index.html
3. 跳到第一步，一直循环下去

问题在于，为什么会发生内部重定向呢？参照 debug 日志信息，内部重定向发生的时间不会早于访问 index.html ，所以我们可以先从 index 指令入手。

参照 Nginx 的文档：http://nginx.org/en/docs/http/ngx_http_index_module.html
> It should be noted that using an index file causes an internal redirect

index 会触发一次内部重定向。现在事情很清楚了。

在 2017年9月30日下午7:25， <swus...@gmail.com>写道：
debug如下不是很能看懂只看到产生了内部重定向导致循坏

2017/09/30 12:04:09 [debug] 6991#0: accept on 0.0.0.0:80, ready: 0
2017/09/30 12:04:09 [debug] 6991#0: posix_memalign: 00007FB388B46070:512 @16
2017/09/30 12:04:09 [debug] 6991#0: *73 accept: 192.168.122.130:58644 fd:3
2017/09/30 12:04:09 [debug] 6991#0: *73 event timer add: 3: 60000:1506744309692
2017/09/30 12:04:09 [debug] 6991#0: *73 reusable connection: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 epoll add event: fd:3 op:1 ev:80002001
2017/09/30 12:04:09 [debug] 6991#0: *73 http wait request handler
2017/09/30 12:04:09 [debug] 6991#0: *73 malloc: 00007FB388BAA860:1024
2017/09/30 12:04:09 [debug] 6991#0: *73 recv: eof:0, avail:1
2017/09/30 12:04:09 [debug] 6991#0: *73 recv: fd:3 91 of 1024
2017/09/30 12:04:09 [debug] 6991#0: *73 reusable connection: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 posix_memalign: 00007FB388BF5980:4096 @16
2017/09/30 12:04:09 [debug] 6991#0: *73 http process request line
2017/09/30 12:04:09 [debug] 6991#0: *73 http request line: "GET /testflag/111 HTTP/1.1"
2017/09/30 12:04:09 [debug] 6991#0: *73 http uri: "/testflag/111"
2017/09/30 12:04:09 [debug] 6991#0: *73 http args: ""
2017/09/30 12:04:09 [debug] 6991#0: *73 http exten: ""
2017/09/30 12:04:09 [debug] 6991#0: *73 posix_memalign: 00007FB388C31A80:4096 @16
2017/09/30 12:04:09 [debug] 6991#0: *73 http process request header line
2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "User-Agent: curl/7.29.0"
2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "Host: 192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "Accept: */*"
2017/09/30 12:04:09 [debug] 6991#0: *73 http header done
2017/09/30 12:04:09 [debug] 6991#0: *73 event timer del: 3: 1506744309692
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"
2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/111", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end
2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10
2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11
2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12
2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13
2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?" =============================这里内部重定向然后就循环了
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"
2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end
2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10
2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11
2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12
2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13
2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"
2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end
2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10
2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11
2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12
2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13
2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"

在 2017年9月30日星期六 UTC+8下午6:49:30，Zexuan Luo写道：
建议开启 debug 等级的 error.log 看一下。
对于配置相关的必现的诡异问题，大部分情况下看 debug 日志会是最快的解决办法之一。

在 2017年9月30日下午4:08， <swus...@gmail.com>写道：
server {
listen 192.168.122.130:80 default;
server_name test;
root html;
index index.html;

location ^~ /testflag/ {
rewrite ^/testflag/(.*)$ /testflag/ break;
}
}
如上配置的虚拟主机,location内使用了rewrite的break flag,为什么curl http://192.168.122.130/testflag/ 返回500 ? error_log如下:
2017/09/30 09:55:32 [error] 6374#0: *47 rewrite or internal redirection cycle while internally redirecting to "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/ HTTP/1.1", host: "192.168.122.130"

这里为什么会产生循环呢,难道不是应该只rewrite一次然后请求html/testflag/index.html 吗?
求解谢谢

--

--

lyj_william

把break 改为last

另外源、目标uri一致就没必要用rewrite了吧

发自网易邮箱大师

在2017年10月04日 01:24，swustzch 写道：

十分感谢:)

在 2017年9月30日星期六 UTC+8下午8:42:22，Zexuan Luo写道：
> 2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
> 2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"
> =============================这里内部重定向然后就循环了
> 2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0

Good Job。现在能够锁定问题大概是这样的：
1. 访问 html/testflag/index.html 的时候会发生内部重定向，然后重新进入 rewrite 阶段
2. 又匹配到 testflag，接着被 rewrite 到 html/testflag/index.html
3. 跳到第一步，一直循环下去

问题在于，为什么会发生内部重定向呢？参照 debug 日志信息，内部重定向发生的时间不会早于访问 index.html ，所以我们可以先从 index 指令入手。

参照 Nginx 的文档：http://nginx.org/en/docs/http/ngx_http_index_module.html
> It should be noted that using an index file causes an internal redirect

index 会触发一次内部重定向。现在事情很清楚了。

在 2017年9月30日下午7:25， <swus...@gmail.com>写道：
debug如下不是很能看懂只看到产生了内部重定向导致循坏

2017/09/30 12:04:09 [debug] 6991#0: accept on 0.0.0.0:80, ready: 0
2017/09/30 12:04:09 [debug] 6991#0: posix_memalign: 00007FB388B46070:512 @16
2017/09/30 12:04:09 [debug] 6991#0: *73 accept: 192.168.122.130:58644 fd:3
2017/09/30 12:04:09 [debug] 6991#0: *73 event timer add: 3: 60000:1506744309692
2017/09/30 12:04:09 [debug] 6991#0: *73 reusable connection: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 epoll add event: fd:3 op:1 ev:80002001
2017/09/30 12:04:09 [debug] 6991#0: *73 http wait request handler
2017/09/30 12:04:09 [debug] 6991#0: *73 malloc: 00007FB388BAA860:1024
2017/09/30 12:04:09 [debug] 6991#0: *73 recv: eof:0, avail:1
2017/09/30 12:04:09 [debug] 6991#0: *73 recv: fd:3 91 of 1024
2017/09/30 12:04:09 [debug] 6991#0: *73 reusable connection: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 posix_memalign: 00007FB388BF5980:4096 @16
2017/09/30 12:04:09 [debug] 6991#0: *73 http process request line
2017/09/30 12:04:09 [debug] 6991#0: *73 http request line: "GET /testflag/111 HTTP/1.1"
2017/09/30 12:04:09 [debug] 6991#0: *73 http uri: "/testflag/111"
2017/09/30 12:04:09 [debug] 6991#0: *73 http args: ""
2017/09/30 12:04:09 [debug] 6991#0: *73 http exten: ""
2017/09/30 12:04:09 [debug] 6991#0: *73 posix_memalign: 00007FB388C31A80:4096 @16
2017/09/30 12:04:09 [debug] 6991#0: *73 http process request header line
2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "User-Agent: curl/7.29.0"
2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "Host: 192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http header: "Accept: */*"
2017/09/30 12:04:09 [debug] 6991#0: *73 http header done
2017/09/30 12:04:09 [debug] 6991#0: *73 event timer del: 3: 1506744309692
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"
2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/111", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end
2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10
2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11
2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12
2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13
2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?" =============================这里内部重定向然后就循环了
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"
2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end
2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10
2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11
2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12
2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13
2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 0
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 1
2017/09/30 12:04:09 [debug] 6991#0: *73 test location: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 using configuration "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http cl:-1 max:1048576
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 3
2017/09/30 12:04:09 [debug] 6991#0: *73 rewrite phase: 4
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex: "^/testflag/(.*)$"
2017/09/30 12:04:09 [notice] 6991#0: *73 "^/testflag/(.*)$" matches "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script copy: "/testflag/"
2017/09/30 12:04:09 [debug] 6991#0: *73 http script regex end
2017/09/30 12:04:09 [notice] 6991#0: *73 rewritten data: "/testflag/", args: "", client: 192.168.122.130, server: test, request: "GET /testflag/111 HTTP/1.1", host: "192.168.122.130"
2017/09/30 12:04:09 [debug] 6991#0: *73 post rewrite phase: 5
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 6
2017/09/30 12:04:09 [debug] 6991#0: *73 generic phase: 7
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 8
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 9
2017/09/30 12:04:09 [debug] 6991#0: *73 access phase: 10
2017/09/30 12:04:09 [debug] 6991#0: *73 post access phase: 11
2017/09/30 12:04:09 [debug] 6991#0: *73 try files phase: 12
2017/09/30 12:04:09 [debug] 6991#0: *73 content phase: 13
2017/09/30 12:04:09 [debug] 6991#0: *73 open index "/home/coremail/openresty/nginx/html/testflag/index.html"
2017/09/30 12:04:09 [debug] 6991#0: *73 internal redirect: "/testflag/index.html?"

在 2017年9月30日星期六 UTC+8下午6:49:30，Zexuan Luo写道：
建议开启 debug 等级的 error.log 看一下。
对于配置相关的必现的诡异问题，大部分情况下看 debug 日志会是最快的解决办法之一。

在 2017年9月30日下午4:08， <swus...@gmail.com>写道：
server {
listen 192.168.122.130:80 default;
server_name test;
root html;
index index.html;

location ^~ /testflag/ {
rewrite ^/testflag/(.*)$ /testflag/ break;
}
}
如上配置的虚拟主机,location内使用了rewrite的break flag,为什么curl http://192.168.122.130/testflag/ 返回500 ? error_log如下:
2017/09/30 09:55:32 [error] 6374#0: *47 rewrite or internal redirection cycle while internally redirecting to "/testflag/index.html", client: 192.168.122.130, server: test, request: "GET /testflag/ HTTP/1.1", host: "192.168.122.130"

这里为什么会产生循环呢,难道不是应该只rewrite一次然后请求html/testflag/index.html 吗?
求解谢谢

--

--

--