cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Announcements
Want to learn some quick and useful tips to make your day easier? Check out how Calvin uses Replay to get feedback from other teams at Dropbox here.

Dropbox API Support & Feedback

Find help with the Dropbox API from other developers.

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

header array invalid request for token auth php

header array invalid request for token auth php

FSUInnovation
Explorer | Level 4
Go to solution

I have been trying to get the header array for my php curl working. This is the structure of it.

$http_headers = array(
	"Authorization: " . base64_encode($app_key . ":" . $app_secret),
	"Content-Type: application/x-www-form-urlencoded",
	"Dropbox-API-Arg: " . json_encode(array(
	'code' => $code,
	'grant_type' => 'authorization_code',
	'redirect_url' => 'http://localhost:8080/FSUInnovation/ResumeUpload.php'	
)));

I get this error:

{"error_description": "No auth function available for given request", "error": "invalid_request"}400

I don't know what particular syntax issue is causing a problem for this particular request. I tried to base it off of my curl for file upload and download.

1 Accepted Solution

Accepted Solutions

Greg-DB
Dropbox Staff
Go to solution

You should send them as POST parameters, encoded using "application/x-www-form-urlencoded", not headers. Here's a basic example I just put together for calling /oauth2/token using curl in PHP:

$app_key = "<APP_KEY>";
$app_secret = "<APP_SECRET>";

$headers = array("Authorization: Basic " . base64_encode($app_key . ":" . $app_secret),
                 "Content-Type: application/x-www-form-urlencoded");

$authorization_code = "<AUTHORIZATION_CODE>";
$redirect_uri = "<REDIRECT_URI>";

$params = array("code" => $authorization_code,
                "grant_type" => "authorization_code",
                "redirect_uri" => $redirect_uri);

$ch = curl_init('https://api.dropboxapi.com/oauth2/token');
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);

echo $response;
if (curl_errno($ch)) {
    echo 'Error:' . curl_error($ch);
}

curl_close($ch);

View solution in original post

3 Replies 3

Greg-DB
Dropbox Staff
Go to solution

When using "Basic" authorization, your "Authorization" header value should start with the string "Basic ". So, that line should look like:

 

	"Authorization: Basic " . base64_encode($app_key . ":" . $app_secret),

Also, note that the /oauth2/token endpoint is based on the OAuth spec and doesn't work like the other Dropbox API endpoints. Specifically, it doesn't take a "Dropbox-API-Arg" header. You should be specifiy those parameters as 'application/x-www-form-urlencoded' POST parameters, not JSON in a header or body.

 

FSUInnovation
Explorer | Level 4
Go to solution

Do the other parameters need to be in a assosiative array appended to the Content Type element like I would do with the API Args, or do I need to post those parameters like this: "code: " . $code, ... ?

Greg-DB
Dropbox Staff
Go to solution

You should send them as POST parameters, encoded using "application/x-www-form-urlencoded", not headers. Here's a basic example I just put together for calling /oauth2/token using curl in PHP:

$app_key = "<APP_KEY>";
$app_secret = "<APP_SECRET>";

$headers = array("Authorization: Basic " . base64_encode($app_key . ":" . $app_secret),
                 "Content-Type: application/x-www-form-urlencoded");

$authorization_code = "<AUTHORIZATION_CODE>";
$redirect_uri = "<REDIRECT_URI>";

$params = array("code" => $authorization_code,
                "grant_type" => "authorization_code",
                "redirect_uri" => $redirect_uri);

$ch = curl_init('https://api.dropboxapi.com/oauth2/token');
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);

echo $response;
if (curl_errno($ch)) {
    echo 'Error:' . curl_error($ch);
}

curl_close($ch);
Need more support?
Who's talking

Top contributors to this post

  • User avatar
    Greg-DB Dropbox Staff
  • User avatar
    FSUInnovation Explorer | Level 4
What do Dropbox user levels mean?