37 {
38 $result = explode(
',', $uri->path, 2);
39 $is_base64 = false;
40 $charset = null;
41 $content_type = null;
44
45 $metas = explode(';', $metadata);
46 while (!empty($metas)) {
47 $cur = array_shift($metas);
48 if ($cur == 'base64') {
49 $is_base64 = true;
50 break;
51 }
52 if (substr($cur, 0, 8) == 'charset=') {
53
54
55 if ($charset !== null) {
56 continue;
57 }
58 $charset = substr($cur, 8);
59 } else {
60 if ($content_type !== null) {
61 continue;
62 }
63 $content_type = $cur;
64 }
65 }
66 } else {
68 }
69 if ($content_type !== null && empty($this->allowed_types[$content_type])) {
70 return false;
71 }
72 if ($charset !== null) {
73
74 $charset = null;
75 }
77 if ($is_base64) {
78 $raw_data = base64_decode(
$data);
79 } else {
81 }
82
83
84 $file = tempnam(
"/tmp",
"");
85 file_put_contents(
$file, $raw_data);
86 if (function_exists('exif_imagetype')) {
87 $image_code = exif_imagetype(
$file);
89 } elseif (function_exists('getimagesize')) {
90 set_error_handler(array($this, 'muteErrorHandler'));
92 restore_error_handler();
95 return false;
96 }
97 $image_code =
$info[2];
98 } else {
99 trigger_error("could not find exif_imagetype or getimagesize functions", E_USER_ERROR);
100 }
101 $real_content_type = image_type_to_mime_type($image_code);
102 if ($real_content_type != $content_type) {
103
104
105 if (empty($this->allowed_types[$real_content_type])) {
106 return false;
107 }
108 $content_type = $real_content_type;
109 }
110
111 $uri->userinfo = null;
112 $uri->host = null;
113 $uri->port = null;
114 $uri->fragment = null;
115 $uri->query = null;
116 $uri->path = "$content_type;base64," . base64_encode($raw_data);
117 return true;
118 }