Mickle this right,if uri like this "/test/aa?aa=1"
modify /test/aa use ngx.req.set_uri()
modify aa=1 use ngx.req.set_uri_args()

    Mickle
    Thank you for your answer, But I found that neither ngx.req.set_uri nor ngx.req.set_uri_args can modify the ngx.var.request_uri.
    The ngx.req.set_uri(uri, true) can jump to a new location, but the ngx.var.request_uri is old in the new location. It can only mofidy the uri which to upstream. Is there some way to modify the value of ngx.var.request_uri?

      garoll
      I found that the function ngx.req.set_uri() can not modify the value of ngx.var.request_uri. it can only modify the uri to upstream.

        garoll
        I want to modify the ngx.var.request_uri, so that can fetch the modified value from ngx.var.request_uri later.

          ccxhwmy I still don't quite understand what you mean by doing this. Can you explain it with a practical example？

            ccxhwmy
            ngx.req.set_uri_args(args)
            ngx.req.set_uri(uri,jump) --uri only ,Do not contain parameter
            The optional boolean jump argument can trigger location rematch (or location jump) as ngx_http_rewrite_module's rewrite directive, that is, when jump is true (default to false), this function will never return and it will tell Nginx to try re-searching locations with the new URI value at the later post-rewrite phase and jumping to the new location.

            if you want to give off all parameter,use follow method
            ngx.var.args=nil

                garoll
                Our project fetch the value of ngx.var.request_uri in many place to do something, but we want to modify the value of ngx.var.request_uri in the begin of a request recently.
                So we want to find out a way to modify it.
                Maybe openresty does not support this way.

                    I config the nginx.conf like:

                            location /request_aaa {
            rewrite_by_lua_block {
               ngx.log(ngx.ERR, "request_uri in location request_aaa: ", ngx.var.request_uri)
               ngx.req.set_uri("/request_bbb", true)
            }
        }

        location /request_bbb {
            rewrite_by_lua_block {
                ngx.log(ngx.ERR, "request_uri in location request_bbb: ", ngx.var.request_uri)
                ngx.log(ngx.ERR, "uri in location request_bbb: ", ngx.var.uri)
            }
            proxy_pass http://127.0.0.1:8888;
        }

                    I make a request like:

                    curl "http://127.0.0.1/request_aaa"

                    The error.log is:

                    2022/08/05 22:47:26 [error] 18673#0: *25 [lua] rewrite_by_lua(nginx.conf:64):2: request_uri in location request_aaa: /request_aaa, client: 192.168.18.128, server: localhost, request: "GET /request_aaa HTTP/1.1", host: "192.168.18.128"
2022/08/05 22:47:26 [error] 18673#0: *25 [lua] rewrite_by_lua(nginx.conf:71):2: request_uri in location request_bbb: /request_aaa, client: 192.168.18.128, server: localhost, request: "GET /request_aaa HTTP/1.1", host: "192.168.18.128"
2022/08/05 22:47:26 [error] 18673#0: *25 [lua] rewrite_by_lua(nginx.conf:71):3: uri in location request_bbb: /request_bbb, client: 192.168.18.128, server: localhost, request: "GET /request_aaa HTTP/1.1", host: "192.168.18.128"

                    We can find that ngx.var.request_uri does not change in the location /request_bbb

                    show response from server 127.0.0.1:8888

                    Mickle Hi~
                    Unfortunately no response from server, there is no server 127.0.0.1:8888 in fact.
                    Because I just want to display the error.log.

                      ccxhwmy
                      Use a nginx varible replice $request_uri in log format，for example $myrequest_uri ,declear it in nginx configure file
                      set $myrequest_uri $request_uri;
                      lua
                      local tmp=ngx.var.uri
                      if ngx.var.args then tmp=tmp.."?"..args end
                      ngx.var.myrequest_uri=tmp

                          ccxhwmy
                          yes，The built-in variables of nginx is readonly.Because that's the behavior of the user's browser.Unless you change it with an external redirect.

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