How can I get POST request JSON body?

Posted on July 29, 2022

Hi,

What is the best way to get the JSON content of a POST request in a serverless function. The traditional way does not work. (traditional function for this is file_get_contents(‘php://input’))

Has anyone done this successfully? TIA

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Bobby Iliev

August 26, 2022

Accepted Answer

Hi there,

I believe that you should be able to just use the function arguments, for example:

<?php
function main(array $args) : array
{
    return ["body" => $args];
}

The following function should contain all of your required data, if you were to make a POST request you would get the following response:

Request example:

curl -X POST https://your_function_host_here -H "Content-Type: application/json"  -d '{"name": "Bobby"}'

You would get the following response:

{
  "__ow_headers": {
    "accept": "*/*",
    "accept-encoding": "gzip",
    "cdn-loop": "cloudflare",
    "cf-connecting-ip": "123.123.123.123",
    "cf-ipcountry": "US",
    "cf-ray": "someidhere-SOF",
    "cf-visitor": "{\"scheme\":\"https\"}",
    "content-type": "application/json",
    "host": "ccontroller",
    "user-agent": "curl/7.79.1",
    "x-forwarded-for": "123.123.123.123",
    "x-forwarded-proto": "https",
    "x-request-id": "some_request_here"
  },
  "__ow_method": "post",
  "__ow_path": "",
  "name": "Bobby"
}

So, let’s say you wanted to access the name value only, you could do the following:

<?php
function main(array $args) : array
{
    $name = $args["name"] ?? "stranger";
    $greeting = "Hello $name!";
    echo $greeting;
    return ["body" => $greeting];
}