CannedREST

index.php

<?php

# Run as:
# php -S 0.0.0.0:80 -t . index.php

# A GET Request of
# http://127.0.0.1/3/en/mobile/merchant/nearby?longitude=-0.127758&latitude=51.5073509&merchant_id=123
# Would output the contents of 
# ./repo/get/3/en/mobile/merchant/nearby/latitude=51.5073509&longitude=-0.127758&merchant_id=123.json


$path = parse_url($_SERVER["REQUEST_URI"], PHP_URL_PATH);

$vars = $_REQUEST;

if (array_key_exists("betatester", $vars)) {
	unset($vars["betatester"]);
}


// Sort variables alphabetically so that the order of the params is irrelevant 
ksort($vars);

// Allow override of HTTP Method if var is set
$method = @$vars['http_method'] ?: $_SERVER['REQUEST_METHOD'];
unset($vars['http_method']);

// Build the file path
// If no params exist then look for '_default.json' 
$query = http_build_query($vars);
if (!strlen($query)) {
	$query = '_default';
}

$extensions = ["json" => "application/json", "html" => "text/html"];

$path = __DIR__ . '/repo/' . strtolower($method) . $path . '/' . $query;

$found = false;

foreach ($extensions as $extension => $mime) {

	$file =  $path . ".{$extension}";

	if (!$found && $realpath = realpath($file)) {

		$found = true;

		header("Content-type: {$mime}");
		$handle = @fopen($realpath, "r");

		if ($handle) {

			while (($buffer = fgets($handle, 4096)) !== false) {

				if (!headers_sent() && ctype_alnum(substr($buffer, 0, 1))) {
					
					$buffer = trim($buffer);
					if (is_numeric($buffer)) {
						http_response_code($buffer);
					} else {
						header($buffer);
					}

				} else {
					echo $buffer;
				}
			}

			fclose($handle);
		}

	}
}

if (!$found) {
	http_response_code(500);
	header("Content-type: text/plain");
	$extensions_str = implode("|", array_keys($extensions));
	echo "Couldn't find response. Expecting: {$path}.[{$extensions_str}]";
}