openresty发起http外部请求

1）安装lua-resty-http
opm get agentzh/lua-resty-http

2）编辑nginx.conf，在http块增加以下配置。
resolver 114.114.114.114 8.8.8.8;
lua_ssl_verify_depth 2;
lua_ssl_trusted_certificate '/etc/ssl/certs/ca-certificates.crt';

备注：如果/etc/ssl/certs/ca-certificates.crt不存在，则安装ca-certificates（例：apt-get install ca-certificates）。

3）代码示例

local http = require "resty.http"
local json = require "cjson"

local httpc = http:new()
local res, err = httpc:request_uri("http://127.0.0.1:80/", {
    method = "POST/GET",
    query = "a=1&b=2",
    body = "c=3&d=4",
    path = "/",
    headers = {
        ["Content-Type"] = "application/json",
        -- ["Content-Type"] = "application/x-www-form-urlencoded",
        ["User-Agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36",
    },
    ssl_verify = false,
})

if err ~= nil then
    ngx.log(ngx.ERR, "http request err:", err)
    return ngx.exit(0)
end

if 200 ~= res.status then
    ngx.exit(res.status)
end

local jsondata = json.decode(res.body)["data"]

httpc:close()
-- httpc:set_keepalive()