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server/apps/files_external/lib/google.php
Michael Gapczynski 30b58f5677 Merge branch 'master' into share_api 
Conflicts:
	apps/calendar/js/loader.js
	apps/contacts/index.php
	apps/contacts/js/loader.js
	apps/files/js/files.js
	apps/files_sharing/sharedstorage.php
	lib/filesystemview.php
2012-07-25 17:08:18 -04:00

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<?php
/**
* ownCloud
*
* @author Michael Gapczynski
* @copyright 2012 Michael Gapczynski mtgap@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
require_once 'Google/common.inc.php';
class OC_Filestorage_Google extends OC_Filestorage_Common {
private $consumer;
private $oauth_token;
private $sig_method;
private $entries;
private static $tempFiles = array();
public function __construct($arguments) {
$consumer_key = isset($arguments['consumer_key']) ? $arguments['consumer_key'] : 'anonymous';
$consumer_secret = isset($arguments['consumer_secret']) ? $arguments['consumer_secret'] : 'anonymous';
$this->consumer = new OAuthConsumer($consumer_key, $consumer_secret);
$this->oauth_token = new OAuthToken($arguments['token'], $arguments['token_secret']);
$this->sig_method = new OAuthSignatureMethod_HMAC_SHA1();
$this->entries = array();
}
private function sendRequest($uri, $httpMethod, $postData = null, $extraHeaders = null, $isDownload = false, $returnHeaders = false, $isContentXML = true, $returnHTTPCode = false) {
$uri = trim($uri);
// create an associative array from each key/value url query param pair.
$params = array();
$pieces = explode('?', $uri);
if (isset($pieces[1])) {
$params = explode_assoc('=', '&', $pieces[1]);
}
// urlencode each url parameter key/value pair
$tempStr = $pieces[0];
foreach ($params as $key => $value) {
$tempStr .= '&' . urlencode($key) . '=' . urlencode($value);
}
$uri = preg_replace('/&/', '?', $tempStr, 1);
$request = OAuthRequest::from_consumer_and_token($this->consumer, $this->oauth_token, $httpMethod, $uri, $params);
$request->sign_request($this->sig_method, $this->consumer, $this->oauth_token);
$auth_header = $request->to_header();
$headers = array($auth_header, 'GData-Version: 3.0');
if ($isContentXML) {
$headers = array_merge($headers, array('Content-Type: application/atom+xml'));
}
if (is_array($extraHeaders)) {
$headers = array_merge($headers, $extraHeaders);
}
$curl = curl_init($uri);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_FAILONERROR, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
switch ($httpMethod) {
case 'GET':
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
break;
case 'POST':
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
break;
case 'PUT':
$headers[] = 'If-Match: *';
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $httpMethod);
curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
break;
case 'DELETE':
$headers[] = 'If-Match: *';
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $httpMethod);
break;
default:
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
}
if ($isDownload) {
$tmpFile = OC_Helper::tmpFile();
$handle = fopen($tmpFile, 'w');
curl_setopt($curl, CURLOPT_FILE, $handle);
}
if ($returnHeaders) {
curl_setopt($curl, CURLOPT_HEADER, true);
}
$result = curl_exec($curl);
$httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
curl_close($curl);
if ($result) {
// TODO https://developers.google.com/google-apps/documents-list/#handling_api_errors
// TODO Log error messages
if ($httpCode <= 308) {
if ($isDownload) {
return $tmpFile;
} else if ($returnHTTPCode) {
return array('result' => $result, 'code' => $httpCode);
} else {
return $result;
}
}
}
return false;
}
private function getFeed($feedUri, $httpMethod, $postData = null) {
$result = $this->sendRequest($feedUri, $httpMethod, $postData);
if ($result) {
$dom = new DOMDocument();
$dom->loadXML($result);
return $dom;
}
return false;
}
private function getResource($path) {
$file = basename($path);
if (array_key_exists($file, $this->entries)) {
return $this->entries[$file];
} else {
// Strip the file extension; file could be a native Google Docs resource
if ($pos = strpos($file, '.')) {
$title = substr($file, 0, $pos);
$dom = $this->getFeed('https://docs.google.com/feeds/default/private/full?showfolders=true&title='.$title, 'GET');
// Check if request was successful and entry exists
if ($dom && $entry = $dom->getElementsByTagName('entry')->item(0)) {
$this->entries[$file] = $entry;
return $entry;
}
}
$dom = $this->getFeed('https://docs.google.com/feeds/default/private/full?showfolders=true&title='.$file, 'GET');
// Check if request was successful and entry exists
if ($dom && $entry = $dom->getElementsByTagName('entry')->item(0)) {
$this->entries[$file] = $entry;
return $entry;
}
return false;
}
}
private function getExtension($entry) {
$mimetype = $this->getMimeType('', $entry);
switch ($mimetype) {
case 'httpd/unix-directory':
return '';
case 'application/vnd.oasis.opendocument.text':
return 'odt';
case 'application/vnd.oasis.opendocument.spreadsheet':
return 'ods';
case 'application/vnd.oasis.opendocument.presentation':
return 'pptx';
case 'text/html':
return 'html';
default:
return 'html';
}
}
public function mkdir($path) {
$collection = dirname($path);
// Check if path parent is root directory
if ($collection == '/' || $collection == '\.' || $collection == '.') {
$uri = 'https://docs.google.com/feeds/default/private/full';
// Get parent content link
} else if ($dom = $this->getResource(basename($collection))) {
$uri = $dom->getElementsByTagName('content')->item(0)->getAttribute('src');
}
if (isset($uri)) {
$title = basename($path);
// Construct post data
$postData = '<?xml version="1.0" encoding="UTF-8"?>';
$postData .= '<entry xmlns="http://www.w3.org/2005/Atom">';
$postData .= '<category scheme="http://schemas.google.com/g/2005#kind" term="http://schemas.google.com/docs/2007#folder"/>';
$postData .= '<title>'.$title.'</title>';
$postData .= '</entry>';
if ($dom = $this->sendRequest($uri, 'POST', $postData)) {
return true;
}
}
return false;
}
public function rmdir($path) {
return $this->unlink($path);
}
public function opendir($path) {
if ($path == '' || $path == '/') {
$next = 'https://docs.google.com/feeds/default/private/full/folder%3Aroot/contents';
} else {
if ($entry = $this->getResource($path)) {
$next = $entry->getElementsByTagName('content')->item(0)->getAttribute('src');
} else {
return false;
}
}
$files = array();
while ($next) {
$dom = $this->getFeed($next, 'GET');
$links = $dom->getElementsByTagName('link');
foreach ($links as $link) {
if ($link->getAttribute('rel') == 'next') {
$next = $link->getAttribute('src');
break;
} else {
$next = false;
}
}
$entries = $dom->getElementsByTagName('entry');
foreach ($entries as $entry) {
$name = $entry->getElementsByTagName('title')->item(0)->nodeValue;
// Google Docs resources don't always include extensions in title
if (!strpos($name, '.')) {
$extension = $this->getExtension($entry);
if ($extension != '') {
$name .= '.'.$extension;
}
}
$files[] = $name;
// Cache entry for future use
$this->entries[$name] = $entry;
}
}
OC_FakeDirStream::$dirs['google'.$path] = $files;
return opendir('fakedir://google'.$path);
}
public function stat($path) {
if ($path == '' || $path == '/') {
$stat['size'] = $this->free_space($path);
$stat['atime'] = time();
$stat['mtime'] = time();
$stat['ctime'] = time();
} else if ($entry = $this->getResource($path)) {
// NOTE: Native resources don't have a file size
$stat['size'] = $entry->getElementsByTagNameNS('http://schemas.google.com/g/2005', 'quotaBytesUsed')->item(0)->nodeValue;
// if (isset($atime = $entry->getElementsByTagNameNS('http://schemas.google.com/g/2005', 'lastViewed')->item(0)->nodeValue))
// $stat['atime'] = strtotime($entry->getElementsByTagNameNS('http://schemas.google.com/g/2005', 'lastViewed')->item(0)->nodeValue);
$stat['mtime'] = strtotime($entry->getElementsByTagName('updated')->item(0)->nodeValue);
$stat['ctime'] = strtotime($entry->getElementsByTagName('published')->item(0)->nodeValue);
}
if (isset($stat)) {
return $stat;
}
return false;
}
public function filetype($path) {
if ($path == '' || $path == '/') {
return 'dir';
} else if ($entry = $this->getResource($path)) {
$categories = $entry->getElementsByTagName('category');
foreach ($categories as $category) {
if ($category->getAttribute('scheme') == 'http://schemas.google.com/g/2005#kind') {
$type = $category->getAttribute('label');
if (strlen(strstr($type, 'folder')) > 0) {
return 'dir';
} else {
return 'file';
}
}
}
}
return false;
}
public function isReadable($path) {
return true;
}
public function isUpdatable($path) {
if ($path == '' || $path == '/') {
return true;
} else if ($entry = $this->getResource($path)) {
// Check if edit or edit-media links exist
$links = $entry->getElementsByTagName('link');
foreach ($links as $link) {
if ($link->getAttribute('rel') == 'edit') {
return true;
} else if ($link->getAttribute('rel') == 'edit-media') {
return true;
}
}
}
return false;
}
public function file_exists($path) {
if ($path == '' || $path == '/') {
return true;
} else if ($this->getResource($path)) {
return true;
}
return false;
}
public function unlink($path) {
// Get resource self link to trash resource
if ($entry = $this->getResource($path)) {
$links = $entry->getElementsByTagName('link');
foreach ($links as $link) {
if ($link->getAttribute('rel') == 'self') {
$uri = $link->getAttribute('href');
break;
}
}
}
if (isset($uri)) {
$this->sendRequest($uri, 'DELETE');
return true;
}
return false;
}
public function rename($path1, $path2) {
if ($entry = $this->getResource($path1)) {
$collection = dirname($path2);
if (dirname($path1) == $collection) {
// Get resource edit link to rename resource
$etag = $entry->getAttribute('gd:etag');
$links = $entry->getElementsByTagName('link');
foreach ($links as $link) {
if ($link->getAttribute('rel') == 'edit') {
$uri = $link->getAttribute('href');
break;
}
}
$title = basename($path2);
// Construct post data
$postData = '<?xml version="1.0" encoding="UTF-8"?>';
$postData .= '<entry xmlns="http://www.w3.org/2005/Atom" xmlns:docs="http://schemas.google.com/docs/2007" xmlns:gd="http://schemas.google.com/g/2005" gd:etag='.$etag.'>';
$postData .= '<title>'.$title.'</title>';
$postData .= '</entry>';
$this->sendRequest($uri, 'PUT', $postData);
return true;
} else {
// Move to different collection
if ($collectionEntry = $this->getResource($collection)) {
$feedUri = $collectionEntry->getElementsByTagName('content')->item(0)->getAttribute('src');
// Construct post data
$postData = '<?xml version="1.0" encoding="UTF-8"?>';
$postData .= '<entry xmlns="http://www.w3.org/2005/Atom">';
$postData .= '<id>'.$entry->getElementsByTagName('id')->item(0).'</id>';
$postData .= '</entry>';
$this->sendRequest($feedUri, 'POST', $postData);
return true;
}
}
}
return false;
}
public function fopen($path, $mode) {
switch ($mode) {
case 'r':
case 'rb':
if ($entry = $this->getResource($path)) {
$extension = $this->getExtension($entry);
$downloadUri = $entry->getElementsByTagName('content')->item(0)->getAttribute('src');
// TODO Non-native documents don't need these additional parameters
$downloadUri .= '&exportFormat='.$extension.'&format='.$extension;
$tmpFile = $this->sendRequest($downloadUri, 'GET', null, null, true);
return fopen($tmpFile, 'r');
}
case 'w':
case 'wb':
case 'a':
case 'ab':
case 'r+':
case 'w+':
case 'wb+':
case 'a+':
case 'x':
case 'x+':
case 'c':
case 'c+':
if (strrpos($path,'.') !== false) {
$ext = substr($path,strrpos($path,'.'));
} else {
$ext = '';
}
$tmpFile = OC_Helper::tmpFile($ext);
OC_CloseStreamWrapper::$callBacks[$tmpFile] = array($this, 'writeBack');
if ($this->file_exists($path)) {
$source = $this->fopen($path, 'r');
file_put_contents($tmpFile, $source);
}
self::$tempFiles[$tmpFile] = $path;
return fopen('close://'.$tmpFile, $mode);
}
return false;
}
public function writeBack($tmpFile) {
if (isset(self::$tempFiles[$tmpFile])) {
$this->uploadFile($tmpFile, self::$tempFiles[$tmpFile]);
unlink($tmpFile);
}
}
private function uploadFile($path, $target) {
$entry = $this->getResource($target);
if (!$entry) {
if (dirname($target) == '.' || dirname($target) == '/') {
$uploadUri = 'https://docs.google.com/feeds/upload/create-session/default/private/full/folder%3Aroot/contents';
} else {
$entry = $this->getResource(dirname($target));
}
}
if (!isset($uploadUri) && $entry) {
$links = $entry->getElementsByTagName('link');
foreach ($links as $link) {
if ($link->getAttribute('rel') == 'http://schemas.google.com/g/2005#resumable-create-media') {
$uploadUri = $link->getAttribute('href');
break;
}
}
}
if (isset($uploadUri) && $handle = fopen($path, 'r')) {
$uploadUri .= '?convert=false';
$mimetype = OC_Helper::getMimeType($path);
$size = filesize($path);
$headers = array('X-Upload-Content-Type: ' => $mimetype, 'X-Upload-Content-Length: ' => $size);
$postData = '<?xml version="1.0" encoding="UTF-8"?>';
$postData .= '<entry xmlns="http://www.w3.org/2005/Atom" xmlns:docs="http://schemas.google.com/docs/2007">';
$postData .= '<title>'.basename($target).'</title>';
$postData .= '</entry>';
$result = $this->sendRequest($uploadUri, 'POST', $postData, $headers, false, true);
if ($result) {
// Get location to upload file
if (preg_match('@^Location: (.*)$@m', $result, $matches)) {
$uploadUri = trim($matches[1]);
}
} else {
return false;
}
// 512 kB chunks
$chunkSize = 524288;
$i = 0;
while (!feof($handle)) {
if ($i + $chunkSize > $size) {
if ($i == 0) {
$chunkSize = $size;
} else {
$chunkSize = $size % $i;
}
}
$end = $i + $chunkSize - 1;
$headers = array('Content-Length: '.$chunkSize, 'Content-Type: '.$mimetype, 'Content-Range: bytes '.$i.'-'.$end.'/'.$size);
$postData = fread($handle, $chunkSize);
$result = $this->sendRequest($uploadUri, 'PUT', $postData, $headers, false, true, false, true);
if ($result['code'] == '308') {
if (preg_match('@^Location: (.*)$@m', $result['result'], $matches)) {
// Get next location to upload file chunk
$uploadUri = trim($matches[1]);
}
$i += $chunkSize;
} else {
return false;
}
}
// TODO Wait for resource entry
}
}
public function getMimeType($path, $entry = null) {
// Entry can be passed, because extension is required for opendir and the entry can't be cached without the extension
if ($entry == null) {
if ($path == '' || $path == '/') {
return 'httpd/unix-directory';
} else {
$entry = $this->getResource($path);
}
}
if ($entry) {
$mimetype = $entry->getElementsByTagName('content')->item(0)->getAttribute('type');
// Native Google Docs resources often default to text/html, but it may be more useful to default to a corresponding ODF mimetype
// Collections get reported as application/atom+xml, make sure it actually is a folder and fix the mimetype
if ($mimetype == 'text/html' || $mimetype == 'application/atom+xml;type=feed') {
$categories = $entry->getElementsByTagName('category');
foreach ($categories as $category) {
if ($category->getAttribute('scheme') == 'http://schemas.google.com/g/2005#kind') {
$type = $category->getAttribute('label');
if (strlen(strstr($type, 'folder')) > 0) {
return 'httpd/unix-directory';
} else if (strlen(strstr($type, 'document')) > 0) {
return 'application/vnd.oasis.opendocument.text';
} else if (strlen(strstr($type, 'spreadsheet')) > 0) {
return 'application/vnd.oasis.opendocument.spreadsheet';
} else if (strlen(strstr($type, 'presentation')) > 0) {
return 'application/vnd.oasis.opendocument.presentation';
} else if (strlen(strstr($type, 'drawing')) > 0) {
return 'application/vnd.oasis.opendocument.graphics';
} else {
// If nothing matches return text/html, all native Google Docs resources can be exported as text/html
return 'text/html';
}
}
}
}
return $mimetype;
}
return false;
}
public function free_space($path) {
if ($dom = $this->getFeed('https://docs.google.com/feeds/metadata/default', 'GET')) {
// NOTE: Native Google Docs resources don't count towards quota
$total = $dom->getElementsByTagNameNS('http://schemas.google.com/g/2005', 'quotaBytesTotal')->item(0)->nodeValue;
$used = $dom->getElementsByTagNameNS('http://schemas.google.com/g/2005', 'quotaBytesUsed')->item(0)->nodeValue;
return $total - $used;
}
return false;
}
public function touch($path, $mtime = null) {
}
}
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