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
|
<?php
namespace Aws\S3;
use Aws\Arn\Exception\InvalidArnException;
use Aws\Arn\S3\AccessPointArn;
use Aws\Arn\ArnParser;
use GuzzleHttp\Psr7;
use Psr\Http\Message\UriInterface;
/**
* Extracts a region, bucket, key, and and if a URI is in path-style
*/
class S3UriParser
{
private $pattern = '/^(.+\\.)?s3[.-]([A-Za-z0-9-]+)\\./';
private $streamWrapperScheme = 's3';
private static $defaultResult = [
'path_style' => true,
'bucket' => null,
'key' => null,
'region' => null
];
/**
* Parses a URL or S3 StreamWrapper Uri (s3://) into an associative array
* of Amazon S3 data including:
*
* - bucket: The Amazon S3 bucket (null if none)
* - key: The Amazon S3 key (null if none)
* - path_style: Set to true if using path style, or false if not
* - region: Set to a string if a non-class endpoint is used or null.
*
* @param string|UriInterface $uri
*
* @return array
* @throws \InvalidArgumentException|InvalidArnException
*/
public function parse($uri)
{
// Attempt to parse host component of uri as an ARN
$components = $this->parseS3UrlComponents($uri);
if (!empty($components)) {
if (ArnParser::isArn($components['host'])) {
$arn = new AccessPointArn($components['host']);
return [
'bucket' => $components['host'],
'key' => $components['path'],
'path_style' => false,
'region' => $arn->getRegion()
];
}
}
$url = Psr7\Utils::uriFor($uri);
if ($url->getScheme() == $this->streamWrapperScheme) {
return $this->parseStreamWrapper($url);
}
if (!$url->getHost()) {
throw new \InvalidArgumentException('No hostname found in URI: '
. $uri);
}
if (!preg_match($this->pattern, $url->getHost(), $matches)) {
return $this->parseCustomEndpoint($url);
}
// Parse the URI based on the matched format (path / virtual)
$result = empty($matches[1])
? $this->parsePathStyle($url)
: $this->parseVirtualHosted($url, $matches);
// Add the region if one was found and not the classic endpoint
$result['region'] = $matches[2] == 'amazonaws' ? null : $matches[2];
return $result;
}
private function parseS3UrlComponents($uri)
{
preg_match("/^([a-zA-Z0-9]*):\/\/([a-zA-Z0-9:-]*)\/(.*)/", $uri, $components);
if (empty($components)) {
return [];
}
return [
'scheme' => $components[1],
'host' => $components[2],
'path' => $components[3],
];
}
private function parseStreamWrapper(UriInterface $url)
{
$result = self::$defaultResult;
$result['path_style'] = false;
$result['bucket'] = $url->getHost();
if ($url->getPath()) {
$key = ltrim($url->getPath(), '/ ');
if (!empty($key)) {
$result['key'] = $key;
}
}
return $result;
}
private function parseCustomEndpoint(UriInterface $url)
{
$result = self::$defaultResult;
$path = ltrim($url->getPath(), '/ ');
$segments = explode('/', $path, 2);
if (isset($segments[0])) {
$result['bucket'] = $segments[0];
if (isset($segments[1])) {
$result['key'] = $segments[1];
}
}
return $result;
}
private function parsePathStyle(UriInterface $url)
{
$result = self::$defaultResult;
if ($url->getPath() != '/') {
$path = ltrim($url->getPath(), '/');
if ($path) {
$pathPos = strpos($path, '/');
if ($pathPos === false) {
// https://s3.amazonaws.com/bucket
$result['bucket'] = $path;
} elseif ($pathPos == strlen($path) - 1) {
// https://s3.amazonaws.com/bucket/
$result['bucket'] = substr($path, 0, -1);
} else {
// https://s3.amazonaws.com/bucket/key
$result['bucket'] = substr($path, 0, $pathPos);
$result['key'] = substr($path, $pathPos + 1) ?: null;
}
}
}
return $result;
}
private function parseVirtualHosted(UriInterface $url, array $matches)
{
$result = self::$defaultResult;
$result['path_style'] = false;
// Remove trailing "." from the prefix to get the bucket
$result['bucket'] = substr($matches[1], 0, -1);
$path = $url->getPath();
// Check if a key was present, and if so, removing the leading "/"
$result['key'] = !$path || $path == '/' ? null : substr($path, 1);
return $result;
}
}
|
