-
Notifications
You must be signed in to change notification settings - Fork 0
/
Captcha.php
387 lines (324 loc) · 10.5 KB
/
Captcha.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
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
<?php
declare(strict_types = 1);
namespace Levi\LaravelRotateCaptcha;
use Illuminate\Cache\Repository;
use Illuminate\Contracts\Encryption\DecryptException;
use Illuminate\Filesystem\FilesystemAdapter;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Crypt;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;
use Levi\LaravelRotateCaptcha\Handle\GdHandle;
use Levi\LaravelRotateCaptcha\Handle\ImagickHandle;
use Levi\LaravelRotateCaptcha\Support\File;
use Levi\LaravelRotateCaptcha\Support\Store;
class Captcha
{
const OUTPUT_JPG = 'jpg';
const OUTPUT_PNG = 'png';
const OUTPUT_WEBP = 'webp';
const OUTPUT_TYPE = [
self::OUTPUT_JPG => 'image/jpeg',
self::OUTPUT_PNG => 'image/png',
self::OUTPUT_WEBP => 'image/webp',
];
const TICKET_RULE = [
'num' => 1,
'time' => 300,
'routers' => null,
];
private static string $_cache = '';
private static string $_disk = '';
/**
* Whether the same angle of the image has been generated
*/
private bool $_existed = false;
/**
* Image handle class
*/
private ?Handle $_handle = null;
/**
* The image path used to generate the rotate captcha image
*/
private string $_image = '';
/**
* Image information
*/
private array $_info = [];
/**
* Image ext
*/
private string $_output = 'webp';
public static function cache(): Repository
{
return Cache::store(self::$_cache);
}
public static function disk(): FilesystemAdapter
{
return Storage::disk(self::$_disk);
}
public static function lang(string $key, array $replace = []): string
{
if ($key === '') return '';
$local = config('rotate.captcha.lang', app('app')->currentLocale());
return trans(
sprintf('rotate.captcha::lang.%s', $key), $replace, $local
);
}
public function __construct()
{
self::$_cache = config('rotate.captcha.cache') ?: config('cache.default');
self::$_disk = config('rotate.captcha.disk') ?: config('filesystems.default');
}
/**
* Build the necessary parameters
*/
public function buildBase(int $size, ?string $output = null): array
{
$this->_setOutput($output);
$size = max($size, 160);
// Get random angle, generate angle hash
$degrees = mt_rand(30, 270);
$handle = $this->_handleRaw();
$cache_path = $this->_getStoreFilePath($degrees, $size);
$cache_file_path = $this->_transform(true) . DIRECTORY_SEPARATOR. $cache_path;
$handle->setCachePathAndDegrees($cache_file_path, $degrees);
return [
$handle,
[
'angle' => $degrees,
'cache' => $cache_file_path,
'output' => $output,
'path' => $cache_path,
'size' => $size,
]
];
}
public function create(
string $ua, string $ip, int $size = 350, ?string $output = null): self
{
if (!extension_loaded('gd') && !extension_loaded('imagick'))
{
throw new CaptchaException(
self::lang('Need to support GD or Imagick extension.')
);
}
$path = config('rotate.captcha.storePath') . DIRECTORY_SEPARATOR . 'origin';
$this->_image = File::make($path)->rand();
if ('' === $this->_image)
{
throw new CaptchaException(
self::lang('Please pass in the material image.')
);
}
// Create image handle class
// Build the necessary parameters
[$handle, $base] = $this->buildBase($size, $output);
// Image from the same angle
if (is_file($base['cache']))
{
$this->_existed = true;
$info = $handle->getInfo($base['cache']);
}
else
{
// Get image information
$info = $handle->getInfo();
if (is_null($handle->front) && !$handle->createFront())
{
throw new CaptchaException(
self::lang('Failed to create image.')
);
}
}
$this->_info = array_merge($info, $base, [
'token' => $this->_buildToken($ua, $ip, $base['angle']),
]);
return $this;
}
/**
* Generate verification pictures and obtain relevant information
*/
public function get(): array
{
// 拿不到信息也不用生成了
if ([] === ($info = $this->info())) return $info;
if (!$this->_existed)
{
// save image and set global size
$this->_existed = $this->_handleRaw()->save($this->_info['size']);
}
return $this->_existed ? $info : [];
}
/**
* Get output mime
*/
public function getMime(): string
{
return self::OUTPUT_TYPE[$this->_output];
}
/**
* Get information about the generated image
*/
public function info(): array
{
$token = $this->_info['token'] ?? '';
return $token === '' ? [] : [
'str' => Crypt::encryptString($this->_info['path'] ?? ''),
'token' => $token,
];
}
/**
* According to the encrypted string, get the image content data
*/
public function output(string $str): array
{
try
{
if (empty($str)) return [null, ''];
$str = Crypt::decryptString($str);
}
catch (DecryptException $e)
{
return [null, ''];
}
$filepath = $this->_transform() . DIRECTORY_SEPARATOR . $str;
if (!is_file($filepath)) return [null, ''];
$mime = 'image/'. pathinfo($filepath, PATHINFO_EXTENSION);
return [$mime, file_get_contents($filepath)];
}
/**
* get ticket info
*/
public function replaceTicket(string $token, string $policie, array $params): array
{
$policie = $policie ?: config('rotate.captcha.policie');
$store = new Store;
do
{
$sid = Str::random(32);
}
while($store->hasKey($sid, true));
// 避免config配置错误,这里加上默认配置
$rule = (config('rotate.captcha.rules', [])[$policie] ?? []) + self::TICKET_RULE;
$info = $store->forget($token)->ticket($sid, $policie, 0, $rule['time']);
return $info === null ? [] : [
'sid' => $sid,
'ticket' => password_hash($sid, PASSWORD_DEFAULT, $params),
];
}
public function verifyTicket(string $sid, string $ticket, string $route_name = ''): bool
{
$store = new Store;
$result = password_verify($sid, $ticket) ? $store->ticket($sid) : null;
if ($result === null) return false;
$policie = $result['policie'];
$expire = $result['expire'];
$uesd = $result['used'];
$rule = (config('rotate.captcha.rules', [])[$policie] ?? []) + self::TICKET_RULE;
if ($rule['num'] < 0 || $rule['time'] < 0) return false;
try
{
// 要先++
$fail = $rule['num'] < $uesd++;
$now = now()->timestamp;
if ($rule['num'] > 0 && ($fail || $rule['num'] === $uesd))
{
throw new CaptchaException('num', $fail ? 1 : 0);
}
if ($rule['time'] > 0 && $now >= $expire)
{
throw new CaptchaException('time', $now === $expire ? 0 : 1);
}
$store->ticket($sid, $policie, $uesd, $expire - $now);
$routers = $rule['routers'];
}
catch (CaptchaException $e)
{
$store->forget($sid, true);
$routers = $e->getCode() === 0 ? $rule['routers'] : [];
}
return $routers === null ? true : in_array($route_name, $routers);
}
private function _buildToken(string $ua, string $ip, int $degrees): string
{
$expire = config('rotate.captcha.expire', 300);
$limit = config('rotate.captcha.limit', 2);
$store_info = [
'ds' => $degrees,
'ip' => $ip,
'ua' => crc32($ua)
];
return (new Store)->put($store_info, $limit, $expire);
}
private function _createTransform(array $path): void
{
$target = implode(DIRECTORY_SEPARATOR, $path);
$disk = self::disk();
if (!$disk->exists($target)) $disk->makeDirectory($target);
}
/**
* 路径规则:原图绝对路径?angle=角度&size=尺寸.格式
* - 规则一样就会使用已有的图片
*/
private function _getStoreFilePath(int $degrees, int $size): string
{
// _token=%s&hash=%s
$link = sprintf(
'%s?angle=%s&size=%s',
$this->_image, sprintf("%03d", $degrees), $size,
);
return md5($link) . $this->_handleRaw()->getFileExt($this->_image, false);
}
private function _handleRaw(): Handle
{
if (!is_null($this->_handle)) return $this->_handle;
$path = storage_path('app' . DIRECTORY_SEPARATOR . $this->_image);
$config = config('rotate.captcha.img');
if ($this->_handleName() === 'imagick')
{
$this->_handle = new ImagickHandle($this, $path, $config);
}
else
{
$this->_handle = new GdHandle($this, $path, $config);
}
return $this->_handle;
}
private function _handleName(): string
{
if (config('rotate.captcha.handle') === 'imagick' && extension_loaded('imagick'))
{
return 'imagick';
}
return 'gd';
}
/**
* 原则上是按照配置文件,为了考虑到兼容性提供一个口子
*/
private function _setOutput(?string $output = null)
{
if (!array_key_exists($output, self::OUTPUT_TYPE))
{
$output = config('rotate.captcha.outputType', 'webp');
if (!array_key_exists($output, self::OUTPUT_TYPE))
{
$output = 'webp';
}
}
$this->_output = $output;
}
/**
* Get transform dir
*/
private function _transform(bool $create = false): string
{
$dir = config('rotate.captcha.storePath', 'rotate.captcha');
$path = ['app', $dir, 'transform'];
if ($create)
{
$this->_createTransform(array_slice($path, 1));
}
return storage_path(implode(DIRECTORY_SEPARATOR, $path));
}
}