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Add different link styles; fixes #73

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This commit is contained in:
Marius Lindvall 2019-12-09 00:00:54 +01:00
parent cacc65b481
commit dbfb58a502
2 changed files with 128 additions and 2 deletions
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85
backend-php/include/inc.php
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@ -29,6 +29,20 @@ const REDIS = 1;
const PASSWORD = 0;
const HTPASSWD = 1;
// Share link types.
const LINK_4_PLUS_4_UPPER_CASE = 0;
const LINK_4_PLUS_4_LOWER_CASE = 1;
const LINK_4_PLUS_4_MIXED_CASE = 2;
const LINK_UUID_V4 = 3;
const LINK_16_HEX = 4;
const LINK_16_UPPER_CASE = 5;
const LINK_16_LOWER_CASE = 6;
const LINK_16_MIXED_CASE = 7;
const LINK_32_HEX = 8;
const LINK_32_UPPER_CASE = 9;
const LINK_32_LOWER_CASE = 10;
const LINK_32_MIXED_CASE = 11;
const KILOMETERS_PER_HOUR = array(
// Relative distance per second multiplied by number of seconds per hour.
"mpsMultiplier" => 3.6,
@ -114,6 +128,7 @@ const DEFAULTS = array(
"allow_link_req" => true,
"reserved_links" => [],
"reserve_whitelist" => false,
"link_style" => LINK_4_PLUS_4_UPPER_CASE,
"map_tile_uri" => 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
"map_attribution" => 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>',
"default_zoom" => 14,
@ -300,8 +315,74 @@ class Share {
protected function generateLinkID() {
$s = "";
do {
$s = strtoupper(base_convert(hash("sha256", openssl_random_pseudo_bytes(LINK_ID_RAND_BYTES)), 16, 36));
$s = substr($s, 0, 4)."-".substr($s, -4);
switch (getConfig("link_style")) {
case LINK_UUID_V4:
// UUID version 4.
$uuid = openssl_random_pseudo_bytes(16);
$uuid[6] = chr(ord($uuid[6]) & 0x0f | 0x40);
$uuid[8] = chr(ord($uuid[8]) & 0x3f | 0x80);
$s = vsprintf("%s%s-%s-%s-%s-%s%s%s", str_split(bin2hex($uuid), 4));
break;
case LINK_16_HEX:
// 16-char (8-byte) hexadecimal string.
$s = bin2hex(openssl_random_pseudo_bytes(8));
break;
case LINK_16_LOWER_CASE:
// 16-char lower-case alphanumeric string.
$alpha = "0123456789abcdefghijklmnopqrstuvwxyz";
for ($i = 0; $i < 16; $i++) $s .= $alpha[random_int(0, strlen($alpha)-1)];
break;
case LINK_16_MIXED_CASE:
// 16-char mixed-case alphanumeric string.
$alpha = "0123456789ABCDEFGHJKLMNOPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
for ($i = 0; $i < 16; $i++) $s .= $alpha[random_int(0, strlen($alpha)-1)];
break;
case LINK_16_UPPER_CASE:
// 16-char upper-case alphanumeric string.
$alpha = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
for ($i = 0; $i < 16; $i++) $s .= $alpha[random_int(0, strlen($alpha)-1)];
break;
case LINK_32_HEX:
// 32-char (16-byte) hexadecimal string.
$s = bin2hex(openssl_random_pseudo_bytes(16));
break;
case LINK_32_LOWER_CASE:
// 32-char lower-case alphanumeric string.
$alpha = "0123456789abcdefghijklmnopqrstuvwxyz";
for ($i = 0; $i < 32; $i++) $s .= $alpha[random_int(0, strlen($alpha)-1)];
break;
case LINK_32_MIXED_CASE:
// 32-char mixed-case alphanumeric string.
// 'l' and 'I' not included because of visual similarity.
$alpha = "0123456789ABCDEFGHJKLMNOPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
for ($i = 0; $i < 32; $i++) $s .= $alpha[random_int(0, strlen($alpha)-1)];
break;
case LINK_32_UPPER_CASE:
// 32-char upper-case alphanumeric string.
$alpha = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
for ($i = 0; $i < 32; $i++) $s .= $alpha[random_int(0, strlen($alpha)-1)];
break;
case LINK_4_PLUS_4_LOWER_CASE:
// 4+4-char lower-case alphanumeric string.
$alpha = "0123456789abcdefghijklmnopqrstuvwxyz";
for ($i = 0; $i < 8; $i++) $s .= $alpha[random_int(0, strlen($alpha)-1)];
$s = substr($s, 0, 4)."-".substr($s, -4);
break;
case LINK_4_PLUS_4_MIXED_CASE:
// 4+4-char mixed-case alphanumeric string.
// 'l' and 'I' not included because of visual similarity.
$alpha = "0123456789ABCDEFGHJKLMNOPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
for ($i = 0; $i < 8; $i++) $s .= $alpha[random_int(0, strlen($alpha)-1)];
$s = substr($s, 0, 4)."-".substr($s, -4);
break;
case LINK_4_PLUS_4_UPPER_CASE:
default:
// 4+4-char upper-case alphanumeric string.
$alpha = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
for ($i = 0; $i < 8; $i++) $s .= $alpha[random_int(0, strlen($alpha)-1)];
$s = substr($s, 0, 4)."-".substr($s, -4);
break;
}
} while ($this->memcache->get(PREFIX_LOCDATA.$s) !== false);
return $s;
}