Lua Requires Chilkat v11.0.0+

Example: Http.HttpJson method - Send a POST with JSON Body

See more HTTP Examples

Demonstrates how to call the HttpJson method, which sends an HTTP POST with a JSON body. This example sends the following request:

POST /echo_request_body.asp HTTP/1.1
Host: chilkatsoft.com
Accept: */*
Accept-Encoding: gzip
Content-Type: application/json
Content-Length: 26

{"greeting":"Hello World"}

Also see: Chilkat Http Default and Auto-Filled Headers

Lua

local chilkat = require("chilkat")

local http = chilkat.Http.new()
local success = false

local json = chilkat.JsonObject.new()

-- Build the following JSON:  {"greeting":"Hello World"}
json:update_string("greeting", "Hello World")

-- This URL echoes the contents of the request body, letting us view it.
local url = "https://chilkatsoft.com/echo_request_body.asp"

-- Send a POST with the JSON in the HTTP request body.
local resp = chilkat.HttpResponse.new()
success = http:http_json("POST", url, json, "application/json", resp)
if not success then
    print(http.last_error_text)
    return
end

print("Response Status Code: " .. resp.status_code)

-- Examine the request we sent.
-- The LastHeader property stores the HTTP request header of the most recent request sent,
-- and in this instance, the response body mirrors the request body.
print(http.last_header)
print(resp.body_str)

-- Output:

-- POST /echo_request_body.asp HTTP/1.1
-- Host: chilkatsoft.com
-- Accept: */*
-- Accept-Encoding: gzip
-- Content-Type: application/json
-- Content-Length: 26
--
-- {"greeting":"Hello World"}