1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2017 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: Wez Furlong <wez@thebrainroom.com>, based on work by: |
16 | Hartmut Holzgraefe <hholzgra@php.net> |
17 +----------------------------------------------------------------------+
18 */
19
20 /* $Id$ */
21
22 #define _GNU_SOURCE
23
24 #include "php.h"
25 #include "php_zlib.h"
26 #include "fopen_wrappers.h"
27
28 #include "main/php_network.h"
29
30 struct php_gz_stream_data_t {
31 gzFile gz_file;
32 php_stream *stream;
33 };
34
php_gziop_read(php_stream * stream,char * buf,size_t count)35 static size_t php_gziop_read(php_stream *stream, char *buf, size_t count)
36 {
37 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
38 int read;
39
40 /* XXX this needs to be looped for the case count > UINT_MAX */
41 read = gzread(self->gz_file, buf, count);
42
43 if (gzeof(self->gz_file)) {
44 stream->eof = 1;
45 }
46
47 return (size_t)((read < 0) ? 0 : read);
48 }
49
php_gziop_write(php_stream * stream,const char * buf,size_t count)50 static size_t php_gziop_write(php_stream *stream, const char *buf, size_t count)
51 {
52 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
53 int wrote;
54
55 /* XXX this needs to be looped for the case count > UINT_MAX */
56 wrote = gzwrite(self->gz_file, (char *) buf, count);
57
58 return (size_t)((wrote < 0) ? 0 : wrote);
59 }
60
php_gziop_seek(php_stream * stream,zend_off_t offset,int whence,zend_off_t * newoffs)61 static int php_gziop_seek(php_stream *stream, zend_off_t offset, int whence, zend_off_t *newoffs)
62 {
63 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
64
65 assert(self != NULL);
66
67 if (whence == SEEK_END) {
68 php_error_docref(NULL, E_WARNING, "SEEK_END is not supported");
69 return -1;
70 }
71 *newoffs = gzseek(self->gz_file, offset, whence);
72
73 return (*newoffs < 0) ? -1 : 0;
74 }
75
php_gziop_close(php_stream * stream,int close_handle)76 static int php_gziop_close(php_stream *stream, int close_handle)
77 {
78 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
79 int ret = EOF;
80
81 if (close_handle) {
82 if (self->gz_file) {
83 ret = gzclose(self->gz_file);
84 self->gz_file = NULL;
85 }
86 if (self->stream) {
87 php_stream_close(self->stream);
88 self->stream = NULL;
89 }
90 }
91 efree(self);
92
93 return ret;
94 }
95
php_gziop_flush(php_stream * stream)96 static int php_gziop_flush(php_stream *stream)
97 {
98 struct php_gz_stream_data_t *self = (struct php_gz_stream_data_t *) stream->abstract;
99
100 return gzflush(self->gz_file, Z_SYNC_FLUSH);
101 }
102
103 php_stream_ops php_stream_gzio_ops = {
104 php_gziop_write, php_gziop_read,
105 php_gziop_close, php_gziop_flush,
106 "ZLIB",
107 php_gziop_seek,
108 NULL, /* cast */
109 NULL, /* stat */
110 NULL /* set_option */
111 };
112
php_stream_gzopen(php_stream_wrapper * wrapper,const char * path,const char * mode,int options,zend_string ** opened_path,php_stream_context * context STREAMS_DC)113 php_stream *php_stream_gzopen(php_stream_wrapper *wrapper, const char *path, const char *mode, int options,
114 zend_string **opened_path, php_stream_context *context STREAMS_DC)
115 {
116 struct php_gz_stream_data_t *self;
117 php_stream *stream = NULL, *innerstream = NULL;
118
119 /* sanity check the stream: it can be either read-only or write-only */
120 if (strchr(mode, '+')) {
121 if (options & REPORT_ERRORS) {
122 php_error_docref(NULL, E_WARNING, "cannot open a zlib stream for reading and writing at the same time!");
123 }
124 return NULL;
125 }
126
127 if (strncasecmp("compress.zlib://", path, 16) == 0) {
128 path += 16;
129 } else if (strncasecmp("zlib:", path, 5) == 0) {
130 path += 5;
131 }
132
133 innerstream = php_stream_open_wrapper_ex(path, mode, STREAM_MUST_SEEK | options | STREAM_WILL_CAST, opened_path, context);
134
135 if (innerstream) {
136 php_socket_t fd;
137
138 if (SUCCESS == php_stream_cast(innerstream, PHP_STREAM_AS_FD, (void **) &fd, REPORT_ERRORS)) {
139 self = emalloc(sizeof(*self));
140 self->stream = innerstream;
141 self->gz_file = gzdopen(dup(fd), mode);
142
143 if (self->gz_file) {
144 stream = php_stream_alloc_rel(&php_stream_gzio_ops, self, 0, mode);
145 if (stream) {
146 stream->flags |= PHP_STREAM_FLAG_NO_BUFFER;
147 return stream;
148 }
149
150 gzclose(self->gz_file);
151 }
152
153 efree(self);
154 if (options & REPORT_ERRORS) {
155 php_error_docref(NULL, E_WARNING, "gzopen failed");
156 }
157 }
158
159 php_stream_close(innerstream);
160 }
161
162 return NULL;
163 }
164
165 static php_stream_wrapper_ops gzip_stream_wops = {
166 php_stream_gzopen,
167 NULL, /* close */
168 NULL, /* stat */
169 NULL, /* stat_url */
170 NULL, /* opendir */
171 "ZLIB",
172 NULL, /* unlink */
173 NULL, /* rename */
174 NULL, /* mkdir */
175 NULL /* rmdir */
176 };
177
178 php_stream_wrapper php_stream_gzip_wrapper = {
179 &gzip_stream_wops,
180 NULL,
181 0, /* is_url */
182 };
183
184 /*
185 * Local variables:
186 * tab-width: 4
187 * c-basic-offset: 4
188 * End:
189 * vim600: noet sw=4 ts=4 fdm=marker
190 * vim<600: noet sw=4 ts=4
191 */
192
