add status_page_one function

[xerox-xeon]

Hello, my name is Shao Dong, I recently in the work with your products, in order to work need me add a function(status_page_one), you see, is not useful, can be merge

[agentzh]

@lifeblood Could you describe the purpose and usage of your new addition? Why should we have it? And how are we going to use it?

[xerox-xeon]

generate an HTML page for specified upstream with URL Parameter for example: http://domain.com/status_one?upstream=foo generate foo upstream status page

        location /status_one {
            access_log off;
            default_type text/plain;
            content_by_lua_block {
                    local hc = require "resty.upstream.healthcheck"
                    ngx.say("Nginx Worker PID: ", ngx.worker.pid())
                    ngx.print(hc.status_page_one())
            }
        }

[xerox-xeon]

get_upstreams() can be obtain one upstream?

[agentzh]

@lifeblood You can use the Lua if statement to branch the code, no?

[xerox-xeon]

Ok

[xerox-xeon]

have done, pls check.

[xerox-xeon]

Is there any place to improve?