Nginx proxy_pass 缺少错误正文

Question

下面是一个非常标准的 nginx proxy_pass 设置:

server {
  listen 80;
  server_name ireport.jungdigital.com;
  access_log /var/log/nginx/ireport.access.log;
  root /var/www/ireport.jungdigital.com/dist;
  index index.html index.htm;
  location / {       
  }
  location /api/ {
    if ($request_method = 'OPTIONS') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, PUT, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Reques
        add_header 'Access-Control-Max-Age' 1728000;
        add_header 'Content-Type' 'text/plain charset=UTF-8';
        add_header 'Content-Length' 0;
        return 204;
     }
     if ($request_method = 'POST') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, PUT, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Reques
     }
     if ($request_method = 'PUT') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, PUT, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Reques
     }
     if ($request_method = 'GET') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, PUT, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Reques
     }
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-NginX-proxy true;
     proxy_set_header Host ireport.somehost.org;
     proxy_pass http://ireport_dyndns/api/;
     proxy_ssl_session_reuse off;
     proxy_redirect off;
  }
}

我代理的 API 返回响应正文，其中包含 400、404 和 500 错误代码的错误信息。例如，在 404 上，我的响应正文可能如下所示:

{
  "errorCode": "TOKEN_NOT_FOUND",
  "errorMessages": [
    "Could not find a matching authorization token."
  ]
}

如果我在没有代理的情况下执行请求，我会得到错误的响应正文。

如果我使用 nginx 代理，由于某种原因，响应正文被 nginx 吞并，我什至在我的 Web 浏览器“网络”选项卡中根本看不到响应。

有没有办法告诉 Nginx 在 proxy_pass 中返回错误代码的响应主体？

Answer 1

我最近遇到了同样的问题。

最后一个答案是:添加代理头升级

proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';

我的完整配置如下:

upstream cloud-api {
        server 127.0.0.1:8089;
}

client_max_body_size 20M;
client_header_buffer_size 8k;
large_client_header_buffers 4 16k;

server {
        listen 8001;
        access_log  /data/senseid-cloud-log/senseid-cloud-api-access.log;
        error_log  /data/senseid-cloud-log/senseid-cloud-api-error.log warn;

        location / {
                proxy_http_version 1.1;
                proxy_set_header Host $http_host;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection 'upgrade';

                proxy_read_timeout 300s;
                proxy_pass http://cloud-api;
        }
}

你可以捕获 500/401 .etc 错误正文

详情: http://nginx.org/en/docs/http/websocket.html

希望能给你一些帮助。