proxy_pass_request_headers off的坑

来源：互联网发布：java能调用api 编辑：程序博客网时间：2024/06/05 18:34

举个例子，客户端访问80端口，服务器需要将请求转发至8080端口处理，

我们希望将客户端传递的headers过滤，再设置内部转发请求header（test:"123"），

坑（通过ngx.req.set_header设置的请求头，会被过滤）：

    server {          listen 80;            location / {            content_by_lua '                ngx.req.set_header("test", "123")                local response = ngx.location.capture("/upstream",                {                    method = ngx.HTTP_GET,                    vars = {                        my_uri = "/hello",                    },                    body = "",                }                )                ngx.exit(200)            ';        }        location /upstream {            set $my_uri $my_uri;            proxy_pass_request_headers off;            proxy_pass http://127.0.0.1:8080$my_uri;        }      }      server {          listen 8080;          location /hello {              content_by_lua '                for k, v in pairs(ngx.req.get_headers()) do                    ngx.log(ngx.ERR, "###: " .. k .. " : " .. v)                end            ';        }      }

正确做法（传递header，重新设置）：

    server {          listen 80;            location / {            content_by_lua '                local response = ngx.location.capture("/upstream",                {                    method = ngx.HTTP_GET,                    vars = {                        my_uri = "/hello",                        my_test = "123",                    },                    body = "",                }                )                ngx.exit(200)            ';        }        location /upstream {            set $my_uri $my_uri;            set $my_test $my_test;            proxy_pass_request_headers off;            proxy_set_header test $my_test;            proxy_pass http://127.0.0.1:8080$my_uri;        }      }          server {          listen 8080;          location /hello {              content_by_lua '                for k, v in pairs(ngx.req.get_headers()) do                    ngx.log(ngx.ERR, "###: " .. k .. " : " .. v)                end            ';        }        }

原文出自：http://blog.csdn.net/daiyudong2020/article/details/78572442

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