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Code Editor : validate-json

#!/usr/bin/env php
<?php
/**
 * JSON schema validator
 *
 * @author Christian Weiske <christian.weiske@netresearch.de>
 */

/**
 * Dead simple autoloader
 *
 * @param string $className Name of class to load
 *
 * @return void
 */
spl_autoload_register(function ($className)
{
    $className = ltrim($className, '\\');
    $fileName  = '';
    if ($lastNsPos = strrpos($className, '\\')) {
        $namespace = substr($className, 0, $lastNsPos);
        $className = substr($className, $lastNsPos + 1);
        $fileName  = str_replace('\\', DIRECTORY_SEPARATOR, $namespace) . DIRECTORY_SEPARATOR;
    }
    $fileName .= str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
    if (stream_resolve_include_path($fileName)) {
        require_once $fileName;
    }
});

// support running this tool from git checkout
if (is_dir(__DIR__ . '/../src/JsonSchema')) {
    set_include_path(__DIR__ . '/../src' . PATH_SEPARATOR . get_include_path());
}

$arOptions = array();
$arArgs = array();
array_shift($argv);//script itself
foreach ($argv as $arg) {
    if ($arg[0] == '-') {
        $arOptions[$arg] = true;
    } else {
        $arArgs[] = $arg;
    }
}

if (count($arArgs) == 0
    || isset($arOptions['--help']) || isset($arOptions['-h'])
) {
    echo <<<HLP
Validate schema
Usage: validate-json data.json
   or: validate-json data.json schema.json

Options:
      --dump-schema     Output full schema and exit
      --dump-schema-url Output URL of schema
      --verbose         Show additional output
      --quiet           Suppress all output
   -h --help            Show this help

HLP;
    exit(1);
}

if (count($arArgs) == 1) {
    $pathData   = $arArgs[0];
    $pathSchema = null;
} else {
    $pathData   = $arArgs[0];
    $pathSchema = getUrlFromPath($arArgs[1]);
}

/**
 * Show the json parse error that happened last
 *
 * @return void
 */
function showJsonError()
{
    $constants = get_defined_constants(true);
    $json_errors = array();
    foreach ($constants['json'] as $name => $value) {
        if (!strncmp($name, 'JSON_ERROR_', 11)) {
            $json_errors[$value] = $name;
        }
    }

output('JSON parse error: ' . $json_errors[json_last_error()] . "\n");
}

function getUrlFromPath($path)
{
    if (parse_url($path, PHP_URL_SCHEME) !== null) {
        //already an URL
        return $path;
    }
    if ($path[0] == '/') {
        //absolute path
        return 'file://' . $path;
    }

//relative path: make absolute
    return 'file://' . getcwd() . '/' . $path;
}

/**
 * Take a HTTP header value and split it up into parts.
 *
 * @param $headerValue
 * @return array Key "_value" contains the main value, all others
 *               as given in the header value
 */
function parseHeaderValue($headerValue)
{
    if (strpos($headerValue, ';') === false) {
        return array('_value' => $headerValue);
    }

$parts = explode(';', $headerValue);
    $arData = array('_value' => array_shift($parts));
    foreach ($parts as $part) {
        list($name, $value) = explode('=', $part);
        $arData[$name] = trim($value, ' "\'');
    }
    return $arData;
}

/**
 * Send a string to the output stream, but only if --quiet is not enabled
 *
 * @param $str string A string output
 */
function output($str) {
    global $arOptions;
    if (!isset($arOptions['--quiet'])) {
        echo $str;
    }
}

$urlData = getUrlFromPath($pathData);

$context = stream_context_create(
    array(
        'http' => array(
            'header'        => array(
                'Accept: */*',
                'Connection: Close'
            ),
            'max_redirects' => 5
        )
    )
);
$dataString = file_get_contents($pathData, false, $context);
if ($dataString == '') {
    output("Data file is not readable or empty.\n");
    exit(3);
}

$data = json_decode($dataString);
unset($dataString);
if ($data === null) {
    output("Error loading JSON data file\n");
    showJsonError();
    exit(5);
}

if ($pathSchema === null) {
    if (isset($http_response_header)) {
        array_shift($http_response_header);//HTTP/1.0 line
        foreach ($http_response_header as $headerLine) {
            list($hName, $hValue) = explode(':', $headerLine, 2);
            $hName = strtolower($hName);
            if ($hName == 'link') {
                //Link: <http://example.org/schema#>; rel="describedBy"
                $hParts = parseHeaderValue($hValue);
                if (isset($hParts['rel']) && $hParts['rel'] == 'describedBy') {
                    $pathSchema = trim($hParts['_value'], ' <>');
                }
            } else if ($hName == 'content-type') {
                //Content-Type: application/my-media-type+json;
                //              profile=http://example.org/schema#
                $hParts = parseHeaderValue($hValue);
                if (isset($hParts['profile'])) {
                    $pathSchema = $hParts['profile'];
                }

}
        }
    }
    if (is_object($data) && property_exists($data, '$schema')) {
        $pathSchema = $data->{'$schema'};
    }

//autodetect schema
    if ($pathSchema === null) {
        output("JSON data must be an object and have a \$schema property.\n");
        output("You can pass the schema file on the command line as well.\n");
        output("Schema autodetection failed.\n");
        exit(6);
    }
}
if ($pathSchema[0] == '/') {
    $pathSchema = 'file://' . $pathSchema;
}

$resolver = new JsonSchema\Uri\UriResolver();
$retriever = new JsonSchema\Uri\UriRetriever();
try {
    $urlSchema = $resolver->resolve($pathSchema, $urlData);

if (isset($arOptions['--dump-schema-url'])) {
        echo $urlSchema . "\n";
        exit();
    }
} catch (Exception $e) {
    output("Error loading JSON schema file\n");
    output($urlSchema . "\n");
    output($e->getMessage() . "\n");
    exit(2);
}
$refResolver = new JsonSchema\SchemaStorage($retriever, $resolver);
$schema = $refResolver->resolveRef($urlSchema);

if (isset($arOptions['--dump-schema'])) {
    $options = defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 0;
    echo json_encode($schema, $options) . "\n";
    exit();
}

try {
    $validator = new JsonSchema\Validator();
    $validator->check($data, $schema);

if ($validator->isValid()) {
        if(isset($arOptions['--verbose'])) {
            output("OK. The supplied JSON validates against the schema.\n");
        }
    } else {
        output("JSON does not validate. Violations:\n");
        foreach ($validator->getErrors() as $error) {
            output(sprintf("[%s] %s\n", $error['property'], $error['message']));
        }
        exit(23);
    }
} catch (Exception $e) {
    output("JSON does not validate. Error:\n");
    output($e->getMessage() . "\n");
    output("Error code: " . $e->getCode() . "\n");
    exit(24);
}

${this.title}

Code Editor : validate-json