致命错误：消息为“ code”的未捕获异常“ InvalidArgumentException”必须为非空

Question

I am trying to display the dropbox folders and files using PHP. Meanwhile I am getting the below error:

Fatal error: Uncaught exception 'InvalidArgumentException' with message ''code' must be non-empty' in D:\\xampp\\htdocs\\Dropbox\\dropbox\\Dropbox\\Checker.php:59 Stack trace: #0 D:\\xampp\\htdocs\\Dropbox\\dropbox\\Dropbox\\WebAuthNoRedirect.php(79): Dropbox\\Checker::argStringNonEmpty('code', '') #1 D:\\xampp\\htdocs\\Dropbox\\dropbox.php(24): Dropbox\\WebAuthNoRedirect->finish('') #2 {main} thrown in D:\\xampp\\htdocs\\Dropbox\\dropbox\\Dropbox\\Checker.php on line 59

This is my code:

<?php
require_once "dropbox/Dropbox/autoload.php";
require_once "dropbox/Dropbox/AppInfo.php";
use \Dropbox as dbx;
$appInfo = dbx\AppInfo::loadFromJsonFile("app-info.json");
$webAuth = new dbx\WebAuthNoRedirect($appInfo, "PHP-Example/1.0");


if(!function_exists("readline")) {
    function readline($prompt = null){
        if($prompt){
            //echo $prompt;
        }
        $fp = fopen("php://stdin","r");
        $line = rtrim(fgets($fp, 1024));
        return $line;
    }
}


$authorizeUrl = $webAuth->start();
$authCode = \trim(\readline("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"));

list($accessToken, $dropboxUserId) = $webAuth->finish($authCode);
print "Access Token: " . $accessToken . "\n"; 
?>

The error is coming from $webAuth->finish() function.From the error i checked the checker.php.There is one function has been defined.That is

static function argStringNonEmpty($argName, $argValue)
    {
        if (!is_string($argValue)) self::throwError($argName, $argValue, "string");
        if (strlen($argValue) === 0) throw new \InvalidArgumentException("'$argName' must be non-empty");
    }

If i command the condition the error keep on moving to the next next function.Please help how to solve it.

Answer 1

It looks like you're the API v1 Dropbox PHP SDK . Your code looks similar to the "authorize" example . That sample is built for a command line app, but you're trying to run it as a web app, so it won't work.

Specifically, you're trying to read from stdin (like how the example uses \\trim(\\fgets(STDIN)) ).

For a web app, you should instead refer to the web-file-browser example .

In either case, you would need to supply the "authorization code" to complete the OAuth app authorization flow .

Also, it's important to note that that PHP SDK uses Dropbox API v1, which is deprecated . You should migrate to Dropbox API v2 instead.

There isn't an official PHP SDK for Dropbox API v2, but you can use a third party library or you can call the HTTPS endpoints themselves.

Answer 2

I have changed my code like below:

session_start();
$_SESSION['user_id'] = 1;

require __DIR__.'/Dropbox/autoload.php';

$dropboxKey = 'XXXXXXXXX';
$dropboxSecret = 'XXXXXXXXXX';
$appName = 'XXXXXXX/1.0';

$appInfo=new Dropbox\AppInfo($dropboxKey,$dropboxSecret);

//store CSRF token
$csrfTokenStore = new Dropbox\ArrayEntryStore($_SESSION,'dropbox-auth-csrf-token');

//Define auth details
$webAuth = new Dropbox\WebAuth($appInfo,$appName,'http://localhost/dropboxapi/dropbox_finish.php',$csrfTokenStore);

if(isset($_session['accessToken']))
{
    $client = new Dropbox\Client($_session['accessToken'],$appName,'UTF-8');
    $client->getAccountInfo();
} else {
$authUrl = $webAuth->start();

Header('Location:'.$authUrl);
exit;
}
list($accessToken) = $webAuth->finish($_GET);

$_session['accessToken']=$accessToken;