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
|
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
/*
* mod_bucketeer.c: split buckets whenever we find a control-char
*
* Written by Ian Holsman (IanH@apache.org)
*
*/
#include "httpd.h"
#include "http_config.h"
#include "http_log.h"
#include "apr_strings.h"
#include "apr_general.h"
#include "util_filter.h"
#include "apr_buckets.h"
#include "http_request.h"
#include "http_protocol.h"
static const char bucketeerFilterName[] = "BUCKETEER";
module AP_MODULE_DECLARE_DATA bucketeer_module;
typedef struct bucketeer_filter_config_t
{
char bucketdelimiter;
char passdelimiter;
char flushdelimiter;
} bucketeer_filter_config_t;
static void *create_bucketeer_server_config(apr_pool_t *p, server_rec *s)
{
bucketeer_filter_config_t *c = apr_pcalloc(p, sizeof *c);
c->bucketdelimiter = 0x02; /* ^B */
c->passdelimiter = 0x10; /* ^P */
c->flushdelimiter = 0x06; /* ^F */
return c;
}
typedef struct bucketeer_ctx_t
{
apr_bucket_brigade *bb;
} bucketeer_ctx_t;
static apr_status_t bucketeer_out_filter(ap_filter_t *f,
apr_bucket_brigade *bb)
{
apr_bucket *e;
request_rec *r = f->r;
bucketeer_ctx_t *ctx = f->ctx;
bucketeer_filter_config_t *c;
c = ap_get_module_config(r->server->module_config, &bucketeer_module);
/* If have a context, it means we've done this before successfully. */
if (!ctx) {
if (!r->content_type || strncmp(r->content_type, "text/", 5)) {
ap_remove_output_filter(f);
return ap_pass_brigade(f->next, bb);
}
/* We're cool with filtering this. */
ctx = f->ctx = apr_pcalloc(f->r->pool, sizeof(*ctx));
ctx->bb = apr_brigade_create(f->r->pool, f->c->bucket_alloc);
apr_table_unset(f->r->headers_out, "Content-Length");
}
APR_BRIGADE_FOREACH(e, bb) {
const char *data;
apr_size_t len, i, lastpos;
if (APR_BUCKET_IS_EOS(e)) {
APR_BUCKET_REMOVE(e);
APR_BRIGADE_INSERT_TAIL(ctx->bb, e);
/* Okay, we've seen the EOS.
* Time to pass it along down the chain.
*/
return ap_pass_brigade(f->next, ctx->bb);
}
if (APR_BUCKET_IS_FLUSH(e)) {
/*
* Ignore flush buckets for the moment..
* we decide what to stream
*/
continue;
}
if (APR_BUCKET_IS_METADATA(e)) {
/* metadata bucket */
apr_bucket *cpy;
apr_bucket_copy(e, &cpy);
APR_BRIGADE_INSERT_TAIL(ctx->bb, cpy);
continue;
}
/* read */
apr_bucket_read(e, &data, &len, APR_BLOCK_READ);
if (len > 0) {
lastpos = 0;
for (i = 0; i < len; i++) {
if (data[i] == c->flushdelimiter ||
data[i] == c->bucketdelimiter ||
data[i] == c->passdelimiter) {
apr_bucket *p;
if (i - lastpos > 0) {
p = apr_bucket_pool_create(apr_pmemdup(f->r->pool,
&data[lastpos],
i - lastpos),
i - lastpos,
f->r->pool,
f->c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(ctx->bb, p);
}
lastpos = i + 1;
if (data[i] == c->flushdelimiter) {
p = apr_bucket_flush_create(f->c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(ctx->bb, p);
}
if (data[i] == c->flushdelimiter ||
data[i] == c->passdelimiter) {
ap_pass_brigade(f->next, ctx->bb);
/* apr_brigade_cleanup(ctx->bb);*/
}
}
}
/* XXX: really should append this to the next 'real' bucket */
if (lastpos < i) {
apr_bucket *p;
p = apr_bucket_pool_create(apr_pmemdup(f->r->pool,
&data[lastpos],
i - lastpos),
i - lastpos,
f->r->pool,
f->c->bucket_alloc);
lastpos = i;
APR_BRIGADE_INSERT_TAIL(ctx->bb, p);
}
}
}
return APR_SUCCESS;
}
static void register_hooks(apr_pool_t * p)
{
ap_register_output_filter(bucketeerFilterName, bucketeer_out_filter,
NULL, AP_FTYPE_RESOURCE-1);
}
static const command_rec bucketeer_filter_cmds[] = {
{NULL}
};
module AP_MODULE_DECLARE_DATA bucketeer_module = {
STANDARD20_MODULE_STUFF,
NULL,
NULL,
create_bucketeer_server_config,
NULL,
bucketeer_filter_cmds,
register_hooks
};
|
