RevProx/proxy-webdav.php at master · null-dev/RevProx · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
<?php
/**
 * PHP Webdav Streaming Reverse Proxy (RevProx) by: NULLDEV
 **/

/*
 * Username and password to webdav
 */
$USERNAME = "";
$PASSWORD = "";

/*
Add extra headers to be sent to the server:

Example:
array(
	'X-Example-Header: somevalue',
	'X-RevProx: is_awesome'
)

Do not delete the authorization header unless your webdav does not require authorization (or if you wish for your clients to authenticate).
*/
$HEADERS = array(
	"Authorization: Basic " . base64_encode($USERNAME . ":" . $PASSWORD)
);

/* Target server (can include path) */
$TARGET = "http://webdav.example.com/";

/* Customize this if you want your own path mapping logic (advanced users) */
$URL = "";
$PATH = "";

/* === END OF CUSTOMIZATION === */

if($URL == "") {
	if(isset($_GET["q"])) {
		$PATH = $_GET["q"];
	} else {
		$PATH = $_SERVER['REQUEST_URI'];
	}
	$URL = "$TARGET$PATH";
}

class ResponseProcessor {
    function stream_open($path, $mode, $options, &$opened_path) {
        return true;
    }

    public function stream_write($data) {
	set_time_limit(300); //5 mins max until next write
	echo $data;
        return strlen($data);
    }
}

stream_wrapper_register("rp", "ResponseProcessor") or die("Failed to register protocol");

$postData = NULL;
function confReq($ch) {
	global $HEADERS;

	//Set custom headers
	curl_setopt($ch, CURLOPT_HTTPHEADER, $HEADERS);

	//POST support
	if($_SERVER['REQUEST_METHOD'] == "POST") {
		if($postData == NULL) {
			$postData = tmpfile();
			file_put_contents("php://input", $postData);
		}
		frewind($postData);

		curl_setopt($ch, CURLOPT_PUT, 1);
		curl_setopt($ch, CURLOPT_INFILESIZE, filesize($postData));
		curl_setopt($ch, CURLOPT_INFILE, ($in=$postData));
		curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
	}
}

//LS if folder
if($URL[strlen($URL) - 1] == "/") {
	$ch = curl_init();
	confReq($ch);
	curl_setopt($ch, CURLOPT_URL, $URL);
	curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PROPFIND');
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
	//Override headers
	curl_setopt($ch, CURLOPT_HTTPHEADER, array_merge($HEADERS, array("Depth: 1")));

	$resp = curl_exec($ch);
	curl_close($ch);

	$xml = simplexml_load_string($resp);
	$ns = $xml->getNamespaces(true);

	$items = $xml->children($ns["d"]);

	$epath = htmlspecialchars($PATH);
	echo "<html><head><title>Index of $epath</title></head>"
	. "<body bgcolor='white'>" . "<h1>Index of $epath</h1><hr><pre><a href='../'>../</a>\n";

	$first = true;
	foreach($items as $item) {
		$value = $item->propstat->prop;
		$dir = sizeof($value->resourcetype->children($ns["d"])) > 0;
		$url = rawurlencode($value->displayname);
		if($dir) {
			$url = "$url/";
		}
		if(!$first) {
			echo "<a href='$url'>" . htmlspecialchars($value->displayname) . "</a>\n";
		} else {
			$first = false;
		}
	}

	echo "</pre><hr></body></html>";

	die;
} else {
	//SERVE HEADERS
	{
		//Grab header info
		$ch = curl_init();
		confReq($ch);
		curl_setopt($ch, CURLOPT_URL, $URL);
		curl_setopt($ch, CURLOPT_NOBODY, true);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_HEADER, true);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

		$headers = curl_exec($ch);
		$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

		curl_close($ch);

		$data = [];
		$headers = explode(PHP_EOL, $headers);
		foreach ($headers as $row) {
			$parts = explode(':', $row);
			if (count($parts) === 2) {
			    $data[trim($parts[0])] = trim($parts[1]);
			}
		}

		//Serve header info
		http_response_code($code);

		//Send headers
		foreach ($data as $key => $value) {
			$ck = strtolower(trim($key));
			if($ck != "connection" and $ck != "server") {
				header("$key: $value");
			}
		}

		header("X-Powered-By: ND-RevProx");
	}

	//SERVE ACTUAL CONTENT BELOW

	$fp = fopen("rp://ROOT", "r+");

	$ch = curl_init();
	confReq($ch);
	curl_setopt($ch, CURLOPT_URL, $URL);
	curl_setopt($ch, CURLOPT_HEADER, 0);
	curl_setopt($ch, CURLOPT_BUFFERSIZE, 4096);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
	curl_setopt($ch, CURLOPT_FILE, $fp);

	curl_exec($ch);

	curl_close($ch);

	fclose($fp);
}
?>