400 錯誤請求，http://localhost/favicon.ico

February 20, 2018

我是 nginx 新手，我的網站剛剛部署到 Digital Ocean。當我嘗試從瀏覽器打開此站點時，它會返回一條400 Bad Request.. Request Header or Cookie Too Large錯誤消息。開發者控制台表明它與伺服器對 favicon.ico 的請求有關。

請求頭

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding:gzip, deflate
Accept-Language:en-US,en;q=0.9,ko-KR;q=0.8,ko;q=0.7
AlexaToolbar-ALX_NS_PH:AlexaToolbar/alx-4.0
Connection:keep-alive
Host:{my host ip}
Upgrade-Insecure-Requests:1
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

NGINX 會議

user www-data;
worker_processes auto;
pid /run/nginx.pid;

events {
       worker_connections 768;
       # multi_accept on;
}

http {

       ##
       # Basic Settings
       ##

       sendfile on;
       tcp_nopush on;
       tcp_nodelay on;
       keepalive_timeout 65;
       types_hash_max_size 2048;
       # server_tokens off;

       # server_names_hash_bucket_size 64;
       # server_name_in_redirect off;

       include /etc/nginx/mime.types;
       default_type application/octet-stream;

       ##
       # SSL Settings
       ##

ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
       ssl_prefer_server_ciphers on;
   ##
   # Logging Settings
   ##

   access_log /var/log/nginx/access.log;
   error_log /var/log/nginx/error.log debug;

   ##
   # Gzip Settings
   ##

   gzip on;
   gzip_disable "msie6";

   # gzip_vary on;
   # gzip_proxied any;
   # gzip_comp_level 6;
   # gzip_buffers 16 8k;
  # gzip_http_version 1.1;
       # gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
   ##
   # Virtual Host Configs
   ##

   include /etc/nginx/conf.d/*.conf;
   include /etc/nginx/sites-enabled/*;
}

/etc/nginx/conf.d/ 不包含文件或子文件夾

/etc/nginx/sites-enabled/default

server {
       listen 80 default_server;
       listen [::]:80 default_server;
     root /var/www/html;

       # Add index.php to the list if you are using PHP
       index index.html index.htm index.nginx-debian.html;

       server_name _;

       location / {
               # First attempt to serve request as file, then
               # as directory, then fall back to displaying a 404.
               try_files $uri $uri/ =404;
       }

/etc/nginx/sites-enabled/myapp

upstream myapp {
 server 159.89.123.456:80;
}

map $http_upgrade $connection_upgrade {
 default upgrade;
 '' close;
}

server {
 listen 80;
 server_name 159.89.123.456;

 location / {
     try_files $uri @proxy;
 }

 location @proxy {
   include proxy_params;
   proxy_set_header X-Real-IP $remote_addr;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_set_header Host $http_host;
   proxy_redirect off;
   proxy_pass http://159.89.123.456:80;
   proxy_http_version 1.1;
   proxy_set_header Upgrade $http_upgrade;
   proxy_set_header Connection "upgrade";
}
}

我真的很感激一些關於可能導致此問題的原因以及如何解決它的指示。下面是來自 nginx 的 error.log。

2018/02/19 06:56:22 [debug] 3499#3499: *1 http upstream request: "/favicon.ico?"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http upstream process header
2018/02/19 06:56:22 [debug] 3499#3499: *1 malloc: 00005575AE6DABF0:4096
2018/02/19 06:56:22 [debug] 3499#3499: *1 recv: fd:11 424 of 4096
2018/02/19 06:56:22 [debug] 3499#3499: *1 http proxy status 400 "400 Bad Request"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http proxy header: "Server: nginx/1.10.3 (Ubuntu)"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http proxy header: "Date: Mon, 19 Feb 2018 06:56:22 GMT"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http proxy header: "Content-Type: text/html"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http proxy header: "Content-Length: 258"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http proxy header: "Connection: keep-alive"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http proxy header done
2018/02/19 06:56:22 [debug] 3499#3499: *1 xslt filter header
2018/02/19 06:56:22 [debug] 3499#3499: *1 **HTTP/1.1 400 Bad Request
Server: nginx/1.10.3 (Ubuntu)
Date: Mon, 19 Feb 2018 06:56:22 GMT
Content-Type: text/html
Content-Length: 258
Connection: keep-alive**

2018/02/19 06:56:22 [debug] 3499#3499: *1 write new buf t:1 f:0 00005575AE6DA880, pos 00005575AE6DA880, size: 166 file: 0, size: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 http write filter: l:0 f:0 s:166
2018/02/19 06:56:22 [debug] 3499#3499: *1 http cacheable: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 http proxy filter init s:400 h:0 c:0 l:258
2018/02/19 06:56:22 [debug] 3499#3499: *1 http upstream process upstream
2018/02/19 06:56:22 [debug] 3499#3499: *1 pipe read upstream: 1
2018/02/19 06:56:22 [debug] 3499#3499: *1 pipe preread: 258
2018/02/19 06:56:22 [debug] 3499#3499: *1 readv: 1, last:3672
2018/02/19 06:56:22 [debug] 3499#3499: *1 readv() not ready (11: Resource temporarily unavailable)
2018/02/19 06:56:22 [debug] 3499#3499: *1 pipe recv chain: -2
2018/02/19 06:56:22 [debug] 3499#3499: *1 pipe buf free s:0 t:1 f:0 00005575AE6DABF0, pos 00005575AE6DAC96, size: 258 file: 0, size: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 pipe length: 258
2018/02/19 06:56:22 [debug] 3499#3499: *1 input buf #0
2018/02/19 06:56:22 [debug] 3499#3499: *1 pipe write downstream: 1
2018/02/19 06:56:22 [debug] 3499#3499: *1 pipe write downstream flush in
2018/02/19 06:56:22 [debug] 3499#3499: *1 http output filter "/favicon.ico?"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http copy filter: "/favicon.ico?"
2018/02/19 06:56:22 [debug] 3499#3499: *1 image filter
2018/02/19 06:56:22 [debug] 3499#3499: *1 xslt filter body
2018/02/19 06:56:22 [debug] 3499#3499: *1 http postpone filter "/favicon.ico?" 00005575AE6DAA58
2018/02/19 06:56:22 [debug] 3499#3499: *1 write old buf t:1 f:0 00005575AE6DA880, pos 00005575AE6DA880, size: 166 file: 0, size: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 write new buf t:1 f:0 00005575AE6DABF0, pos 00005575AE6DAC96, size: 258 file: 0, size: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 http write filter: l:0 f:0 s:424
2018/02/19 06:56:22 [debug] 3499#3499: *1 http copy filter: 0 "/favicon.ico?"
2018/02/19 06:56:22 [debug] 3499#3499: *1 pipe write downstream done
2018/02/19 06:56:22 [debug] 3499#3499: *1 event timer: 11, old: 1519023442215, new: 1519023442222
2018/02/19 06:56:22 [debug] 3499#3499: *1 http upstream exit: 0000000000000000
2018/02/19 06:56:22 [debug] 3499#3499: *1 finalize http upstream request: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 finalize http proxy request
2018/02/19 06:56:22 [debug] 3499#3499: *1 free rr peer 1 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 close http upstream connection: 11
2018/02/19 06:56:22 [debug] 3499#3499: *1 free: 00005575AE6D5630, unused: 48
2018/02/19 06:56:22 [debug] 3499#3499: *1 event timer del: 11: 1519023442215
2018/02/19 06:56:22 [debug] 3499#3499: *1 reusable connection: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 http upstream temp fd: -1
2018/02/19 06:56:22 [debug] 3499#3499: *1 http output filter "/favicon.ico?"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http copy filter: "/favicon.ico?"
2018/02/19 06:56:22 [debug] 3499#3499: *1 image filter
2018/02/19 06:56:22 [debug] 3499#3499: *1 xslt filter body
2018/02/19 06:56:22 [debug] 3499#3499: *1 http postpone filter "/favicon.ico?" 00007FFDCA8F4CD0
2018/02/19 06:56:22 [debug] 3499#3499: *1 write old buf t:1 f:0 00005575AE6DA880, pos 00005575AE6DA880, size: 166 file: 0, size: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 write old buf t:1 f:0 00005575AE6DABF0, pos 00005575AE6DAC96, size: 258 file: 0, size: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 write new buf t:0 f:0 0000000000000000, pos 0000000000000000, size: 0 file: 0, size: 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 http write filter: l:1 f:0 s:424
2018/02/19 06:56:22 [debug] 3499#3499: *1 http write filter limit 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 writev: 424 of 424
2018/02/19 06:56:22 [debug] 3499#3499: *1 http write filter 0000000000000000
2018/02/19 06:56:22 [debug] 3499#3499: *1 http copy filter: 0 "/favicon.ico?"
2018/02/19 06:56:22 [debug] 3499#3499: *1 http finalize request: 0, "/favicon.ico?" a:1, c:1
2018/02/19 06:56:22 [debug] 3499#3499: *1 set http keepalive handler
2018/02/19 06:56:22 [debug] 3499#3499: *1 http close request
2018/02/19 06:56:22 [debug] 3499#3499: *1 http log handler
2018/02/19 06:56:22 [debug] 3499#3499: *1 posix_memalign: 00005575AE6DBC00:4096 @16
2018/02/19 06:56:22 [debug] 3499#3499: *1 free: 00005575AE6DABF0
2018/02/19 06:56:22 [debug] 3499#3499: *1 free: 00005575AE6E6F80, unused: 5
2018/02/19 06:56:22 [debug] 3499#3499: *1 free: 00005575AE6D9BE0, unused: 80
2018/02/19 06:56:22 [debug] 3499#3499: *1 free: 00005575AE6DBC00, unused: 3786
2018/02/19 06:56:22 [debug] 3499#3499: *1 free: 00005575AE6F63E0
2018/02/19 06:56:22 [debug] 3499#3499: *1 hc free: 0000000000000000 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 hc busy: 0000000000000000 0
2018/02/19 06:56:22 [debug] 3499#3499: *1 reusable connection: 1
2018/02/19 06:56:22 [debug] 3499#3499: *1 event timer add: 3: 65000:1519023447222
2018/02/19 06:56:22 [debug] 3499#3499: *1 post event 00005575AE7393C0
2018/02/19 06:56:22 [debug] 3499#3499: *1 delete posted event 00005575AE7393C0
2018/02/19 06:56:22 [debug] 3499#3499: *1 http keepalive handler
2018/02/19 06:56:22 [debug] 3499#3499: *1 malloc: 00005575AE6F63E0:1024
2018/02/19 06:56:22 [debug] 3499#3499: *1 recv: fd:3 -1 of 1024
2018/02/19 06:56:22 [debug] 3499#3499: *1 recv() not ready (11: Resource temporarily unavailable)
2018/02/19 06:56:22 [debug] 3499#3499: *1 free: 00005575AE6F63E0
2018/02/19 06:56:22 [debug] 3499#3499: *21 http keepalive handler
2018/02/19 06:56:22 [debug] 3499#3499: *21 malloc: 00005575AE6F63E0:1024
2018/02/19 06:56:22 [debug] 3499#3499: *21 recv: fd:12 0 of 1024
2018/02/19 06:56:22 [info] 3499#3499: *21 client 159.89.139.178 closed keepalive connection
2018/02/19 06:56:22 [debug] 3499#3499: *21 close http connection: 12
2018/02/19 06:56:22 [debug] 3499#3499: *21 event timer del: 12: 1519023447222
2018/02/19 06:56:22 [debug] 3499#3499: *21 reusable connection: 0
2018/02/19 06:56:22 [debug] 3499#3499: *21 free: 00005575AE6F63E0
2018/02/19 06:56:22 [debug] 3499#3499: *21 free: 00005575AE6F67F0, unused: 128
2018/02/19 06:57:27 [debug] 3499#3499: *1 event timer del: 3: 1519023447222
2018/02/19 06:57:27 [debug] 3499#3499: *1 http keepalive handler
2018/02/19 06:57:27 [debug] 3499#3499: *1 close http connection: 3

正如邁克爾漢普頓所說，你的配置很尷尬。這個塊：
location / {
 try_files $uri @proxy;
}
告訴 nginx 從 /var/www/html 提供文件（如果存在），否則代理請求到http://159.89.123.456:80（對自身），這會導致對不存在的文件進行無限遞歸

引用自：https://serverfault.com/questions/897824

400 錯誤請求，http://localhost/favicon.ico

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