-
Notifications
You must be signed in to change notification settings - Fork 23
/
index.php
executable file
·233 lines (194 loc) · 10.1 KB
/
index.php
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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
<?PHP
require 'config.php';
// ##############################################
// ##### NOTHING FURTHER TO CONFIGURE BELOW #####
// ##############################################
$s = (empty($_SERVER['HTTPS']) ? '' : ($_SERVER['HTTPS'] == 'on')) ? 's' : '';
$base_url = "http$s://" . $_SERVER['HTTP_HOST'] . '/';
$db = mysqli_connect($dbhost, $dbuser, $dbpass, $dbname) or error('Could not connect to database.', 500);
$accepts_json = $_SERVER['HTTP_ACCEPT'] == 'application/json' ? true : false;
if($accepts_json) {
header('Content-Type: application/json');
}
if($_SERVER['REQUEST_URI'] == '/') { doNothing(); exit; }
if($pw_stats == '' && preg_match('!^/stats(/?.*)$!', $_SERVER['REQUEST_URI']) == 1) { stats(); exit; }
if($pw_stats != '' && preg_match('!^/stats/' . preg_quote($pw_stats, '!') . '/?$!', $_SERVER['REQUEST_URI']) == 1) { stats(); exit; }
if(preg_match("!^/[$valid_chars]+/?$!", $_SERVER['REQUEST_URI']) == 1) { processSlug(); exit; }
if($pw_stats == '' && preg_match("!^/[$valid_chars]+/stats/?$!", $_SERVER['REQUEST_URI']) == 1) { slugStats(); exit; }
if($pw_stats != '' && preg_match("!^/[$valid_chars]+/stats/" . preg_quote($pw_stats, '!') . "/?$!", $_SERVER['REQUEST_URI']) == 1) { slugStats(); exit; }
if($pw_create == '' && preg_match("!^/[a-z0-9]+://.+$!", $_SERVER['REQUEST_URI']) == 1) { createLink(); exit; }
if($pw_create != '' && preg_match("!^/" . preg_quote($pw_create, '!') . "/[a-z0-9]+://.+$!", $_SERVER['REQUEST_URI']) == 1) { createLink(); exit; }
exit;
function doNothing() {
global $url_blank;
if(strlen($url_blank) > 0) {
header("Location: $url_blank");
} else {
error("Nothing to do.");
}
}
function processSlug() {
global $db;
$slug = trim($_SERVER['REQUEST_URI'], '/');
$escaped_slug = mysqli_real_escape_string($db, $slug);
$result = mysqli_query($db, "SELECT url FROM links WHERE slug = '$escaped_slug'") or error('Could not fetch slug from database.', 500);
if($result === false || mysqli_num_rows($result) == 0) error('slug not found', 404);
mysqli_query($db, "UPDATE links SET visits = visits + 1, last_visited = NOW() WHERE slug = '$escaped_slug'") or error('Could not increment visit count.', 500);
$escaped_referer = mysqli_real_escape_string($db, $_SERVER['HTTP_REFERER']);
mysqli_query($db, "INSERT INTO visits (slug, visit_date, referer) VALUES ('$escaped_slug', NOW(), '$escaped_referer')") or error('Could not record visit.', 500);
$row = mysqli_fetch_row($result);
$url = $row[0];
header('Location: ' . $url);
}
function createLink() {
global $base_url, $random_chars, $slug_length, $db, $pw_create, $accepts_json;
$url = ltrim($_SERVER['REQUEST_URI'], '/');
if($pw_create != '') {
$url = preg_replace('!^'. preg_quote($pw_create, '!') . '/(.+)$!', '$1', $url);
}
do {
$possible_slug = '';
for($i = 0; $i < $slug_length; $i++) {
$possible_slug .= $random_chars[rand(0, strlen($random_chars) - 1)];
}
$result = mysqli_query($db, "SELECT COUNT(*) FROM links WHERE slug = '$possible_slug'") or error('Could not generate new slug.', 500);
$row = mysqli_fetch_row($result);
$count = $row[0];
if($count == 0) {
$slug = $possible_slug;
}
} while(is_null($slug));
$escaped_url = mysqli_real_escape_string($db, $url) or error('Could not escape URL.', 500);
$result = mysqli_query($db, "INSERT INTO links (slug, url, visits, created) VALUES ('$slug', '$escaped_url', 0, NOW())") or error('Could not insert new URL into the database.', 500);
if($result == false) error('Inserting into database failed.', 500);
$short_url = $base_url . $slug;
if($accepts_json) {
echo json_encode(array('short_url' => $short_url, 'slug' => $slug));
} else {
echo $short_url;
}
}
function stats() {
global $db, $base_url, $pw_stats, $accepts_json;
$data = array();
$result = mysqli_query($db, 'SELECT * FROM links ORDER BY created DESC LIMIT 50') or error('Could not fetch recent URLs.', 500);
while($link = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
$reffering_domains = array();
$visits = mysqli_query($db, "SELECT * FROM visits WHERE slug = '{$link['slug']}'") or error('Could not fetch visits for slug.', 500);
while($visit = mysqli_fetch_array($visits, MYSQLI_ASSOC)) {
if(strlen($visit['referer']) > 0) {
$url_info = parse_url($visit['referer']);
$scheme = $url_info['scheme'];
$host = $url_info['host'];
$domain = $scheme . '://' . $host;
if(is_null($reffering_domains[$domain])) {
$reffering_domains[$domain] = 1;
} else {
$reffering_domains[$domain] = $reffering_domains[$domain] + 1;
}
}
}
array_multisort($reffering_domains, SORT_DESC);
if(count($reffering_domains) > 0) {
$key = key($reffering_domains);
$link['top_referer'] = array('domain' => $key, 'visits' => $reffering_domains[$key]);
}
$data[] = $link;
}
if($accepts_json) {
echo json_encode($data);
} else {
echo "<h1>Recent Clicks</h1>";
echo "<table><thead><td><strong>Created</strong></td><td><strong>Slug</strong></td><td><strong>URL</strong></td><td><strong>Visits</strong></td><td><strong>Last Visit</strong></td><td><strong>Top Referer</strong></td><td></td></thead>";
echo "<tbody>";
foreach($data as $link) {
$short_url = $base_url . $link['slug'];
echo "<tr>";
echo "<td>{$link['created']}</td>";
echo "<td><a href='$short_url'>{$link['slug']}</a></td>";
echo "<td><a href='{$link['url']}'>{$link['url']}</a></td>";
echo "<td>{$link['visits']}</td>";
echo "<td>{$link['last_visited']}</td>";
if(is_null($link['top_referer'])) {
echo "<td></td>";
} else {
$s = $link['top_referer']['visits'] == 1 ? '' : 's';
echo "<td><a href='" . $link['top_referer']['domain'] . "'>" . $link['top_referer']['domain'] . "</a> (" . $link['top_referer']['visits'] . " visit$s)</td>";
}
echo "<td><a href='/{$link['slug']}/stats/$pw_stats'>View Stats</a></td>";
echo "</tr>";
}
echo "</tbody>";
echo "</table>";
}
}
function slugStats() {
global $db, $pw_stats, $valid_chars, $accepts_json;
$slug = trim($_SERVER['REQUEST_URI'], '/');
$slug = preg_replace("!^([$valid_chars]+)/stats.*$!", '$1', $slug);
$escaped_slug = mysqli_real_escape_string($db, $slug);
$result = mysqli_query($db, "SELECT * FROM links WHERE slug = '$escaped_slug'") or error('Could not fetch slug from database.', 500);
if($result === false || mysqli_num_rows($result) == 0) error('Slug not found.', 404);
$data = array();
$data['info'] = mysqli_fetch_array($result, MYSQLI_ASSOC);
$data['visits'] = array();
$reffering_domains = array();
$visits = mysqli_query($db, "SELECT * FROM visits WHERE slug = '$escaped_slug'") or error('Could not fetch visits for slug.', 500);
while($visit = mysqli_fetch_array($visits, MYSQLI_ASSOC)) {
if(strlen($visit['referer']) > 0) {
$url_info = parse_url($visit['referer']);
$scheme = $url_info['scheme'];
$host = $url_info['host'];
$domain = $scheme . '://' . $host;
if(is_null($reffering_domains[$domain])) {
$reffering_domains[$domain] = 1;
} else {
$reffering_domains[$domain] = $reffering_domains[$domain] + 1;
}
}
$data['visits'][] = $visit;
}
array_multisort($reffering_domains, SORT_DESC);
$data['referers'] = $reffering_domains;
if($accepts_json) {
echo json_encode($data);
} else {
echo "<h1>Stats for <a href='" . $data['info']['url'] . "'>" . $data['info']['url'] . "</a></h1>";
echo "<ul>";
echo "<li><strong>Created:</strong> " . $data['info']['created'] . "</li>";
echo "<li><strong>Visits:</strong> " . $data['info']['visits'] . "</li>";
echo "</ul>";
echo "<h2>Top Referers</h2>";
echo "<table><thead><td><strong>Domain</strong></td><td><strong>Visits</strong></td></thead><tbody>";
foreach($data['referers'] as $domain => $visits) {
echo "<tr>";
echo "<td><a href='$domain'>" . $domain . "</a></td>";
echo "<td>" . $visits . "</td>";
echo "</tr>";
}
echo "</tbody></table>";
echo "<h2>Recent Visits</h2>";
echo "<table><thead><td><strong>Date</strong></td><td><strong>Referer</strong></td></thead><tbody>";
foreach($data['visits'] as $visit) {
echo "<tr>";
echo "<td>" . $visit['visit_date'] . "</td>";
echo "<td><a href='{$visit['referer']}'>{$visit['referer']}</a></td>";
echo "</tr>";
}
echo "</tbody></table>";
}
}
function error($msg, $http_response_code = 200) {
global $accepts_json, $url_not_found;
if(($http_response_code == 404) && (strlen($url_not_found) > 0)) {
header("Location: $url_not_found");
exit;
}
http_response_code($http_response_code);
if($accepts_json) {
echo json_encode(array('error' => $msg));
} else {
echo $msg;
}
exit;
}