nginx发起http请求

桃扇骨 2022-06-18 10:28 334阅读 0赞

## 配置 ##

可以用`proxypass`

配置文件如下：

worker_processes  2;        #nginx worker 数量
    error_log logs/error.log;   #指定错误日志文件路径
    events {
        worker_connections 1024;
    }
    
    http {
        upstream md5_server{
            server 127.0.0.1:81;    
            keepalive 20; 
        }
    
        server {
            listen    1024;
    
            location /test {
                content_by_lua_block {
                    ngx.req.read_body()
                    local args, err = ngx.req.get_uri_args()
    
    
    
                    local res = ngx.location.capture('/spe_md5',
                        {
                            method = ngx.HTTP_POST,
                            body = args.data
                        }
                    )
    
                    if 200 ~= res.status then
                        ngx.exit(res.status)
                    end
    
    
    
    
            ngx.say(args.data)
            ngx.say(res.body)
                    if args.key == res.body then
                        ngx.say("valid request")
                    else
                        ngx.say("invalid request")
                    end
                }
            }
    
            location /spe_md5 {
                proxy_pass http://md5_server;
                #For HTTP, the proxy_http_version directive should be set to “1.1” and the “Connection” 
                #header field should be cleared.（from:http://nginx.org/en/docs/http/ngx_http_upstream_module.html#keepalive)
                proxy_http_version 1.1;
                proxy_set_header Connection "";
            }
        }# server port 1024 
    
        server {
            listen    81;
            location /spe_md5 {
                content_by_lua_block {
                    ngx.req.read_body()
                    local data = ngx.req.get_body_data()
                    ngx.print(ngx.md5(data)) 
                }
            }
        }
    }

配置了一个81端口的上游服务器，并在/test下用capture做了一个子查询，最后返回md5值

## 测试 ##

curl -v -X GET 'localhost:1024/test?key=5d41402abc4b2a76b9719d911017c592&data=hello'

## 参考 ##

openresty最佳实践