cant get post data

[corn1ng]

sorry i use openresty to create a api gateway. meet probelm.
my openresty version is openresty/1.13.6.2 and use MacOS
my code fragment is here .

content_by_lua_block{
      ngx.req.read_body()
      local args, err = ngx.req.get_uri_args()
      local http = require "resty.http"
      local json = require "resty.json"
      local request_method = ngx.var.request_method
      local headers = ngx.req.get_headers()
      local cookie = headers.cookie
      local body = {
          url = ngx.var.uri,
          query = ngx.req.get_uri_args(),
          type = request_method,
          post = ngx.req.get_post_args()
      }
      ngx.log(ngx.ERR,PrintTable(body['post']))
}

my code is here
when i use postman send a post request

the body['post'] is null not have value.

the log is here

[agentzh]

@corn1ng Maybe you should try ngx.req.get_body_data() and/or ngx.req.get_body_file() instead. The ngx.req.get_post_args() requires the Content-Type: application/x-www-form-urlencoded request header and the request body must be encoded in this way. See

https://github.com/openresty/lua-nginx-module#ngxreqget_post_args

for more details.

[corn1ng]

Ok,Thanks