Nginx Practice in Windows - 6 simple proxy server

Description

使用 nginx 的一個主因是要支援 web application 放在別台機器上, 將相關的 request 導過去.

Reference

Setting Up a Simple Proxy Server

Practice

1. prepare files

   D:\nginx-1.4.3\nginx.exe
   D:\nginx-1.4.3\conf\nginx.conf
   D:\nginx-1.4.3\testhtml\testhtml.html
   D:\nginx-1.4.3\internal\internal.html
   D:\nginx-1.4.3\internal\service\service.html
   D:\nginx-1.4.3\internal\service\serviceA\serviceA.html
   

2. setup nginx.conf
   (注意 proxy_pass 的 127.0.0.1 要對應到 port 12345 的 server_name 127.0.0.1, 在練習的時候發現如果設定成 proxy_pass http://localhost:12345 那 nginx 就很容易遇到錯誤: 68 upstream timed out (10060: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond) while connecting to upstream, client: 127.0.0.1, server: 127.0.0.1, request: "GET /service/serviceA/serviceA7.html HTTP/1.1)

       server {
           listen       8080;
           server_name  127.0.0.1;
           root         testhtml;
           location / {
               index testhtml.html;
           }
           location /service/ {
               proxy_pass http://127.0.0.1:12345;
           }
       } 
       server {
           listen       12345;
           server_name  127.0.0.1;
           root         internal;
           location / {
               index  internal.html;
           }        
           location /service/ {
               index  service.html;
           }
       } 
   

3. run "nginx -s reload"
4. run "telnet 127.0.0.1 8080"
5. send request

   GET /service/ HTTP/1.1
   Host: 127.0.0.1:8080
   Connection: close
   User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36
   Accept: */*
   Accept-Encoding: gzip,deflate,sdch
   Accept-Language: zh-TW,zh;q=0.8,en-US;q=0.6,en;q=0.4
   

6. get response

   HTTP/1.1 200 OK
   Server: nginx/1.4.3
   Date: Wed, 30 Oct 2013 23:25:39 GMT
   Content-Type: text/html
   Content-Length: 20
   Connection: close
   Last-Modified: Wed, 30 Oct 2013 23:25:34 GMT
   ETag: "5271956e-14"
   Accept-Ranges: bytes
   
   This is service.html

7. 如果把 debug log 打開, 就是把 nginx.conf 上的"#error_log  logs/error.log  debug;" 注解拿掉, 就可以看到 error.log 裡面出現下面這些 log, 看似 nginx 在 proxy_pass 的時候改寫了 http request 然後重新發一次. (不過說起來 proxy 本來就是在作這種事情就是了)
   
   

   2013/10/31 07:25:39 [debug] 4348#6716: *139 http script copy: "Host: "
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http script var: "127.0.0.1:12345"
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http script copy: "
   "
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http script copy: "Connection: close
   "
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http script copy: ""
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http script copy: ""
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http proxy header: "User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36"
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http proxy header: "Accept: */*"
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http proxy header: "Accept-Encoding: gzip,deflate,sdch"
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http proxy header: "Accept-Language: zh-TW,zh;q=0.8,en-US;q=0.6,en;q=0.4"
   2013/10/31 07:25:39 [debug] 4348#6716: *139 http proxy header:
   "GET /service/ HTTP/1.0
   Host: 127.0.0.1:12345
   Connection: close
   User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36
   Accept: */*
   Accept-Encoding: gzip,deflate,sdch
   Accept-Language: zh-TW,zh;q=0.8,en-US;q=0.6,en;q=0.4

   "

8. send request

   GET /service/serviceA/serviceA.html HTTP/1.1
   Host: 127.0.0.1:8080
   Connection: close
   User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36
   Accept: */*
   Accept-Encoding: gzip,deflate,sdch
   Accept-Language: zh-TW,zh;q=0.8,en-US;q=0.6,en;q=0.4
   

9. get response

   HTTP/1.1 200 OK
   Server: nginx/1.4.3
   Date: Wed, 30 Oct 2013 23:33:12 GMT
   Content-Type: text/html
   Content-Length: 21
   Connection: close
   Last-Modified: Wed, 30 Oct 2013 23:33:08 GMT
   ETag: "52719734-15"
   Accept-Ranges: bytes
   
   This is serviceA.html