Google Drive integration error php - php

Question

I have to add file in Drive. I have tried following code but give an error.
Purpose :
I have to use an api to add file to google drive.
Code
<?php
$ch = curl_init ();
curl_setopt_array ( $ch, array (
CURLOPT_URL => 'https://www.googleapis.com/upload/drive/v3/files?uploadType=media',
CURLOPT_HTTPHEADER => array (
'Content-Type: application/pdf', // todo: runtime detection?
'Authorization: Bearer [YOUR_AUTH_TOKEN]'
),
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => file_get_contents ( '/path/to/file.pdf' ),
CURLOPT_RETURNTRANSFER => 1
) );
try {
if (false === ($resp = curl_exec ( $ch ))) {
throw new \RuntimeException ( 'curl error ' . curl_errno ( $ch ) . ": " . curl_error ( $ch ) );
}
$parsed = json_decode ( $resp, true );
if (! $parsed || $parsed ['code'] !== 200) {
throw new \RuntimeException ( 'google api error: ' . $resp );
}
} finally{
curl_close ( $ch );
}
var_dump($resp);
Error :
Notice: Undefined index: code in
/opt/lampp/htdocs/uploadtodrive/index.php on line 18
Fatal error: Uncaught RuntimeException: google api error: { "error": {
"errors": [ { "domain": "global", "reason": "authError", "message":
"Invalid Credentials", "locationType": "header", "location":
"Authorization" } ], "code": 401, "message": "Invalid Credentials" } }
in /opt/lampp/htdocs/uploadtodrive/index.php:19 Stack trace: #0 {main}
thrown in /opt/lampp/htdocs/uploadtodrive/index.php on line 19

Answer 1

You have create a webapplication and client ID ,Secrete as well as redirect URL. redirect URL is missing.
<?php
$GAPIS = 'https://www.googleapis.com/';
$GAPIS_AUTH = $GAPIS . 'auth/';
$GOAUTH = 'https://accounts.google.com/o/oauth2/';
$CLIENT_ID = '709846732498-t19mhuuvq0nqtxxxxim8.apps.googleusercontent.com';
$CLIENT_SECRET = 'K8YxRshxxxx-5Sh3jKa';
$REDIRECT_URI = 'http' . ($_SERVER['SERVER_PORT'] == 80 ? '' : 's') . '://' . $_SERVER['SERVER_NAME'] . $_SERVER['SCRIPT_NAME'];
$SCOPES = array($GAPIS_AUTH . 'drive', $GAPIS_AUTH . 'drive.file', $GAPIS_AUTH . 'userinfo.email', $GAPIS_AUTH . 'userinfo.profile');
$STORE_PATH = 'credentials.json';
function uploadFile($credentials, $filename, $targetPath)
{
global $GAPIS;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $GAPIS . 'upload/drive/v2/files?uploadType=media');
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, file_get_contents($filename));
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER,
array('Content-Type : text/plain', 'Content-Length:' . filesize($filename),
'Authorization: Bearer ' . getAccessToken($credentials))
);
$postResult = curl_exec($ch);
curl_close($ch);
return json_decode($postResult, true);
}
function getStoredCredentials($path)
{
$credentials = json_decode(file_get_contents($path), true);
if (isset($credentials['refresh_token']))
return $credentials;
$expire_date = new DateTime();
$expire_date->setTimestamp($credentials['created']);
$expire_date->add(new DateInterval('PT' . $credentials['expires_in'] . 'S'));
$current_time = new DateTime();
if ($current_time->getTimestamp() >= $expire_date->getTimestamp())
{
$credentials = null;
unlink($path);
}
return $credentials;
}
function storeCredentials($path, $credentials)
{
$credentials['created'] = (new DateTime())->getTimestamp();
file_put_contents($path, json_encode($credentials));
return $credentials;
}
function requestAuthCode()
{
global $GOAUTH, $CLIENT_ID, $REDIRECT_URI, $SCOPES;
$url = sprintf($GOAUTH . 'auth?scope=%s&redirect_uri=%s&response_type=code&client_id=%s&approval_prompt=force&access_type=offline',
urlencode(implode(' ', $SCOPES)), urlencode($REDIRECT_URI), urlencode($CLIENT_ID)
);
header('Location:' . $url);
}
function requestAccessToken($access_code)
{
global $GOAUTH, $CLIENT_ID, $CLIENT_SECRET, $REDIRECT_URI;
$url = $GOAUTH . 'token';
$post_fields = 'code=' . $access_code . '&client_id=' . urlencode($CLIENT_ID) . '&client_secret=' . urlencode($CLIENT_SECRET)
. '&redirect_uri=' . urlencode($REDIRECT_URI) . '&grant_type=authorization_code';
$ch = curl_init();
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $url);
$result = curl_exec($ch);
curl_close($ch);
return json_decode($result, true);
}
function getAccessToken($credentials)
{
$expire_date = new DateTime();
$expire_date->setTimestamp($credentials['created']);
$expire_date->add(new DateInterval('PT' . $credentials['expires_in'] . 'S'));
$current_time = new DateTime();
if ($current_time->getTimestamp() >= $expire_date->getTimestamp())
return $credentials['refresh_token'];
else
return $credentials['access_token'];
}
function authenticate()
{
global $STORE_PATH;
if (file_exists($STORE_PATH))
$credentials = getStoredCredentials($STORE_PATH);
else
$credentials = null;
if (!(isset($_GET['code']) || isset($credentials)))
requestAuthCode();
if (!isset($credentials))
$credentials = requestAccessToken($_GET['code']);
if (isset($credentials) && isset($credentials['access_token']) && !file_exists($STORE_PATH))
$credentials = storeCredentials($STORE_PATH, $credentials);
return $credentials;
}
$credentials = authenticate();
$result = uploadFile($credentials, 'my_file.txt', 'vasim.txt');
if (!isset($result['id']))
throw new Exception(print_r($result));
else
echo 'File copied successfuly (file Id: ' . $result['id'] . ')';