| | varnish-cache/bin/varnishd/cache/cache_gzip.c |
|---|
| 0 |
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/*- |
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* Copyright (c) 2013-2015 Varnish Software AS |
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* All rights reserved. |
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* |
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* Author: Poul-Henning Kamp <phk@phk.freebsd.dk> |
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* |
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* SPDX-License-Identifier: BSD-2-Clause |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* Interaction with the libvgz (zlib) library. |
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* |
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* The zlib library pollutes namespace a LOT when you include the "vgz.h" |
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* (aka "zlib.h") file so we contain the damage by vectoring all access |
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* to libz through this source file. |
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* |
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* The API defined by this file, will also insulate the rest of the code, |
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* should we find a better gzip library at a later date. |
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* |
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*/ |
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|
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#include "config.h" |
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|
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#include <stdlib.h> |
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|
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#include "cache_varnishd.h" |
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#include "cache_filter.h" |
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#include "cache_objhead.h" |
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#include "cache_vgz.h" |
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#include "vend.h" |
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|
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#include "vgz.h" |
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|
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struct vgz { |
| 53 |
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unsigned magic; |
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#define VGZ_MAGIC 0x162df0cb |
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enum {VGZ_GZ,VGZ_UN} dir; |
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struct vsl_log *vsl; |
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const char *id; |
| 58 |
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int last_i; |
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enum vgz_flag flag; |
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|
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char *m_buf; |
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ssize_t m_sz; |
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ssize_t m_len; |
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|
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intmax_t bits; |
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|
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z_stream vz; |
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}; |
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|
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static const char * |
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240 |
vgz_msg(const struct vgz *vg) |
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{ |
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240 |
CHECK_OBJ_NOTNULL(vg, VGZ_MAGIC); |
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240 |
return (vg->vz.msg ? vg->vz.msg : "(null)"); |
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} |
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|
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/*-------------------------------------------------------------------- |
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* Set up a gunzip instance |
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*/ |
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|
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static struct vgz * |
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9240 |
vgz_gunzip(struct vsl_log *vsl, const char *id) |
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{ |
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struct vgz *vg; |
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|
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9240 |
ALLOC_OBJ(vg, VGZ_MAGIC); |
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9240 |
AN(vg); |
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9240 |
vg->vsl = vsl; |
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9240 |
vg->id = id; |
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9240 |
vg->dir = VGZ_UN; |
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|
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/* |
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* Max memory usage according to zonf.h: |
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* mem_needed = "a few kb" + (1 << (windowBits)) |
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* Since we don't control windowBits, we have to assume |
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* it is 15, so 34-35KB or so. |
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*/ |
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9240 |
assert(Z_OK == inflateInit2(&vg->vz, 31)); |
| 99 |
9240 |
return (vg); |
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} |
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|
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static struct vgz * |
| 103 |
8040 |
VGZ_NewGunzip(struct vsl_log *vsl, const char *id) |
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{ |
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8040 |
VSC_C_main->n_gunzip++; |
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8040 |
return (vgz_gunzip(vsl, id)); |
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} |
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|
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static struct vgz * |
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1200 |
VGZ_NewTestGunzip(struct vsl_log *vsl, const char *id) |
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{ |
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1200 |
VSC_C_main->n_test_gunzip++; |
| 113 |
1200 |
return (vgz_gunzip(vsl, id)); |
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} |
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|
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struct vgz * |
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3680 |
VGZ_NewGzip(struct vsl_log *vsl, const char *id) |
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{ |
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struct vgz *vg; |
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int i; |
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|
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3680 |
VSC_C_main->n_gzip++; |
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3680 |
ALLOC_OBJ(vg, VGZ_MAGIC); |
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3680 |
AN(vg); |
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3680 |
vg->vsl = vsl; |
| 126 |
3680 |
vg->id = id; |
| 127 |
3680 |
vg->dir = VGZ_GZ; |
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|
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/* |
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* From zconf.h: |
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* |
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* mem_needed = "a few kb" |
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* + (1 << (windowBits+2)) |
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* + (1 << (memLevel+9)) |
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* |
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* windowBits [8..15] (-> 1K..128K) |
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* memLevel [1..9] (-> 1K->256K) |
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*/ |
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3680 |
i = deflateInit2(&vg->vz, |
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cache_param->gzip_level, /* Level */ |
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Z_DEFLATED, /* Method */ |
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16 + 15, /* Window bits (16=gzip) */ |
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cache_param->gzip_memlevel, /* memLevel */ |
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Z_DEFAULT_STRATEGY); |
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3680 |
assert(Z_OK == i); |
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3680 |
return (vg); |
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} |
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|
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/*-------------------------------------------------------------------- |
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*/ |
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|
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static int |
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9880 |
vgz_getmbuf(struct vgz *vg) |
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{ |
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|
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9880 |
CHECK_OBJ_NOTNULL(vg, VGZ_MAGIC); |
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9880 |
AZ(vg->m_sz); |
| 158 |
9880 |
AZ(vg->m_len); |
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9880 |
AZ(vg->m_buf); |
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|
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9880 |
vg->m_sz = cache_param->gzip_buffer; |
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9880 |
vg->m_buf = malloc(vg->m_sz); |
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9880 |
if (vg->m_buf == NULL) { |
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0 |
vg->m_sz = 0; |
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0 |
return (-1); |
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} |
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9880 |
return (0); |
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9880 |
} |
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|
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|
/*--------------------------------------------------------------------*/ |
| 171 |
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|
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void |
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67042 |
VGZ_Ibuf(struct vgz *vg, const void *ptr, ssize_t len) |
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{ |
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|
| 176 |
67042 |
CHECK_OBJ_NOTNULL(vg, VGZ_MAGIC); |
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|
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67042 |
AZ(vg->vz.avail_in); |
| 179 |
67042 |
vg->vz.next_in = TRUST_ME(ptr); |
| 180 |
67042 |
vg->vz.avail_in = len; |
| 181 |
67042 |
} |
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|
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int |
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150941 |
VGZ_IbufEmpty(const struct vgz *vg) |
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{ |
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|
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150941 |
CHECK_OBJ_NOTNULL(vg, VGZ_MAGIC); |
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150941 |
return (vg->vz.avail_in == 0); |
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} |
| 190 |
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|
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/*--------------------------------------------------------------------*/ |
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|
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void |
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71093 |
VGZ_Obuf(struct vgz *vg, void *ptr, ssize_t len) |
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{ |
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|
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71093 |
CHECK_OBJ_NOTNULL(vg, VGZ_MAGIC); |
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|
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71093 |
vg->vz.next_out = TRUST_ME(ptr); |
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71093 |
vg->vz.avail_out = len; |
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71093 |
} |
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|
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int |
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42838 |
VGZ_ObufFull(const struct vgz *vg) |
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{ |
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|
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42838 |
CHECK_OBJ_NOTNULL(vg, VGZ_MAGIC); |
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42838 |
return (vg->vz.avail_out == 0); |
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} |
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|
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/*--------------------------------------------------------------------*/ |
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|
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static enum vgzret_e |
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32734 |
VGZ_Gunzip(struct vgz *vg, const void **pptr, ssize_t *plen) |
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{ |
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int i; |
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ssize_t l; |
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const uint8_t *before; |
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|
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32734 |
CHECK_OBJ_NOTNULL(vg, VGZ_MAGIC); |
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|
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32734 |
*pptr = NULL; |
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32734 |
*plen = 0; |
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32734 |
AN(vg->vz.next_out); |
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32734 |
AN(vg->vz.avail_out); |
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32734 |
before = vg->vz.next_out; |
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32734 |
i = inflate(&vg->vz, 0); |
| 228 |
32734 |
if (i == Z_OK || i == Z_STREAM_END) { |
| 229 |
32574 |
*pptr = before; |
| 230 |
32574 |
l = (const uint8_t *)vg->vz.next_out - before; |
| 231 |
32574 |
*plen = l; |
| 232 |
32574 |
} |
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32734 |
vg->last_i = i; |
| 234 |
32734 |
if (i == Z_OK) |
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22654 |
return (VGZ_OK); |
| 236 |
10080 |
if (i == Z_STREAM_END) |
| 237 |
9920 |
return (VGZ_END); |
| 238 |
160 |
if (i == Z_BUF_ERROR) |
| 239 |
80 |
return (VGZ_STUCK); |
| 240 |
80 |
VSLb(vg->vsl, SLT_Gzip, "Gunzip error: %d (%s)", i, vgz_msg(vg)); |
| 241 |
80 |
return (VGZ_ERROR); |
| 242 |
32734 |
} |
| 243 |
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|
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/*--------------------------------------------------------------------*/ |
| 245 |
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|
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enum vgzret_e |
| 247 |
45518 |
VGZ_Gzip(struct vgz *vg, const void **pptr, ssize_t *plen, enum vgz_flag flags) |
| 248 |
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{ |
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int i; |
| 250 |
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int zflg; |
| 251 |
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ssize_t l; |
| 252 |
|
const uint8_t *before; |
| 253 |
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|
| 254 |
45518 |
CHECK_OBJ_NOTNULL(vg, VGZ_MAGIC); |
| 255 |
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|
| 256 |
45518 |
*pptr = NULL; |
| 257 |
45518 |
*plen = 0; |
| 258 |
45518 |
AN(vg->vz.next_out); |
| 259 |
45518 |
AN(vg->vz.avail_out); |
| 260 |
45518 |
before = vg->vz.next_out; |
| 261 |
45518 |
switch (flags) { |
| 262 |
29998 |
case VGZ_NORMAL: zflg = Z_NO_FLUSH; break; |
| 263 |
5000 |
case VGZ_ALIGN: zflg = Z_SYNC_FLUSH; break; |
| 264 |
5040 |
case VGZ_RESET: zflg = Z_FULL_FLUSH; break; |
| 265 |
5480 |
case VGZ_FINISH: zflg = Z_FINISH; break; |
| 266 |
0 |
default: WRONG("Invalid VGZ flag"); |
| 267 |
0 |
} |
| 268 |
45518 |
i = deflate(&vg->vz, zflg); |
| 269 |
45518 |
if (i == Z_OK || i == Z_STREAM_END) { |
| 270 |
45518 |
*pptr = before; |
| 271 |
45518 |
l = (const uint8_t *)vg->vz.next_out - before; |
| 272 |
45518 |
*plen = l; |
| 273 |
45518 |
} |
| 274 |
45518 |
vg->last_i = i; |
| 275 |
45518 |
if (i == Z_OK) |
| 276 |
42038 |
return (VGZ_OK); |
| 277 |
3480 |
if (i == Z_STREAM_END) |
| 278 |
3480 |
return (VGZ_END); |
| 279 |
0 |
if (i == Z_BUF_ERROR) |
| 280 |
0 |
return (VGZ_STUCK); |
| 281 |
0 |
VSLb(vg->vsl, SLT_Gzip, "Gzip error: %d (%s)", i, vgz_msg(vg)); |
| 282 |
0 |
return (VGZ_ERROR); |
| 283 |
45518 |
} |
| 284 |
|
|
| 285 |
|
/*-------------------------------------------------------------------- |
| 286 |
|
* VDP for gunzip'ing |
| 287 |
|
*/ |
| 288 |
|
|
| 289 |
|
static int v_matchproto_(vdp_init_f) |
| 290 |
3040 |
vdp_gunzip_init(VRT_CTX, struct vdp_ctx *vdc, void **priv) |
| 291 |
|
{ |
| 292 |
|
struct vgz *vg; |
| 293 |
|
struct boc *boc; |
| 294 |
|
enum boc_state_e bos; |
| 295 |
|
const char *p; |
| 296 |
|
ssize_t dl; |
| 297 |
|
uint64_t u; |
| 298 |
|
|
| 299 |
3040 |
CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC); |
| 300 |
3040 |
CHECK_OBJ_NOTNULL(vdc, VDP_CTX_MAGIC); |
| 301 |
3040 |
CHECK_OBJ_ORNULL(vdc->oc, OBJCORE_MAGIC); |
| 302 |
3040 |
CHECK_OBJ_NOTNULL(vdc->hp, HTTP_MAGIC); |
| 303 |
3040 |
AN(vdc->clen); |
| 304 |
3040 |
AN(priv); |
| 305 |
|
|
| 306 |
3040 |
vg = VGZ_NewGunzip(vdc->vsl, "U D -"); |
| 307 |
3040 |
AN(vg); |
| 308 |
3040 |
if (vgz_getmbuf(vg)) { |
| 309 |
0 |
(void)VGZ_Destroy(&vg); |
| 310 |
0 |
return (-1); |
| 311 |
|
} |
| 312 |
|
|
| 313 |
3040 |
VGZ_Obuf(vg, vg->m_buf, vg->m_sz); |
| 314 |
3040 |
*priv = vg; |
| 315 |
|
|
| 316 |
3040 |
http_Unset(vdc->hp, H_Content_Encoding); |
| 317 |
|
|
| 318 |
3040 |
*vdc->clen = -1; |
| 319 |
|
|
| 320 |
3040 |
if (vdc->oc == NULL) |
| 321 |
680 |
return (0); |
| 322 |
|
|
| 323 |
2360 |
boc = HSH_RefBoc(vdc->oc); |
| 324 |
2360 |
if (boc != NULL) { |
| 325 |
440 |
CHECK_OBJ(boc, BOC_MAGIC); |
| 326 |
440 |
bos = boc->state; |
| 327 |
440 |
HSH_DerefBoc(vdc->wrk, vdc->oc); |
| 328 |
440 |
if (bos < BOS_FINISHED) |
| 329 |
440 |
return (0); /* OA_GZIPBITS is not stable yet */ |
| 330 |
0 |
} |
| 331 |
|
|
| 332 |
1920 |
p = ObjGetAttr(vdc->wrk, vdc->oc, OA_GZIPBITS, &dl); |
| 333 |
1920 |
if (p != NULL && dl == 32) { |
| 334 |
1920 |
u = vbe64dec(p + 24); |
| 335 |
1920 |
if (u != 0) |
| 336 |
1880 |
*vdc->clen = u; |
| 337 |
1920 |
} |
| 338 |
1920 |
return (0); |
| 339 |
3040 |
} |
| 340 |
|
|
| 341 |
|
static int v_matchproto_(vdp_fini_f) |
| 342 |
3040 |
vdp_gunzip_fini(struct vdp_ctx *vdc, void **priv) |
| 343 |
|
{ |
| 344 |
|
struct vgz *vg; |
| 345 |
|
|
| 346 |
3040 |
(void)vdc; |
| 347 |
3040 |
TAKE_OBJ_NOTNULL(vg, priv, VGZ_MAGIC); |
| 348 |
3040 |
AN(vg->m_buf); |
| 349 |
3040 |
(void)VGZ_Destroy(&vg); |
| 350 |
3040 |
return (0); |
| 351 |
|
} |
| 352 |
|
|
| 353 |
|
static int v_matchproto_(vdp_bytes_f) |
| 354 |
17395 |
vdp_gunzip_bytes(struct vdp_ctx *vdc, enum vdp_action act, void **priv, |
| 355 |
|
const void *ptr, ssize_t len) |
| 356 |
|
{ |
| 357 |
|
enum vgzret_e vr; |
| 358 |
|
ssize_t dl; |
| 359 |
|
const void *dp; |
| 360 |
|
struct worker *wrk; |
| 361 |
|
struct vgz *vg; |
| 362 |
|
|
| 363 |
17395 |
CHECK_OBJ_NOTNULL(vdc, VDP_CTX_MAGIC); |
| 364 |
17395 |
wrk = vdc->wrk; |
| 365 |
17395 |
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC); |
| 366 |
17395 |
(void)act; |
| 367 |
|
|
| 368 |
17395 |
CAST_OBJ_NOTNULL(vg, *priv, VGZ_MAGIC); |
| 369 |
17395 |
AN(vg->m_buf); |
| 370 |
|
|
| 371 |
17395 |
if (len == 0) |
| 372 |
4676 |
return (0); |
| 373 |
|
|
| 374 |
12719 |
VGZ_Ibuf(vg, ptr, len); |
| 375 |
12719 |
do { |
| 376 |
12719 |
vr = VGZ_Gunzip(vg, &dp, &dl); |
| 377 |
12719 |
if (vr == VGZ_END && !VGZ_IbufEmpty(vg)) { |
| 378 |
80 |
VSLb(vg->vsl, SLT_Gzip, "G(un)zip error: %d (%s)", |
| 379 |
40 |
vr, "junk after VGZ_END"); |
| 380 |
40 |
return (-1); |
| 381 |
|
} |
| 382 |
12679 |
vg->m_len += dl; |
| 383 |
12679 |
if (vr < VGZ_OK) |
| 384 |
0 |
return (-1); |
| 385 |
12679 |
if (vg->m_len == vg->m_sz || vr != VGZ_OK) { |
| 386 |
5840 |
if (VDP_bytes(vdc, vr == VGZ_END ? VDP_END : VDP_FLUSH, |
| 387 |
2920 |
vg->m_buf, vg->m_len)) |
| 388 |
160 |
return (vdc->retval); |
| 389 |
2760 |
vg->m_len = 0; |
| 390 |
2760 |
VGZ_Obuf(vg, vg->m_buf, vg->m_sz); |
| 391 |
2760 |
} |
| 392 |
12519 |
} while (!VGZ_IbufEmpty(vg)); |
| 393 |
12519 |
assert(vr == VGZ_STUCK || vr == VGZ_OK || vr == VGZ_END); |
| 394 |
12519 |
return (0); |
| 395 |
17395 |
} |
| 396 |
|
|
| 397 |
|
const struct vdp VDP_gunzip = { |
| 398 |
|
.name = "gunzip", |
| 399 |
|
.init = vdp_gunzip_init, |
| 400 |
|
.bytes = vdp_gunzip_bytes, |
| 401 |
|
.fini = vdp_gunzip_fini, |
| 402 |
|
}; |
| 403 |
|
|
| 404 |
|
/*--------------------------------------------------------------------*/ |
| 405 |
|
|
| 406 |
|
void |
| 407 |
50202 |
VGZ_UpdateObj(const struct vfp_ctx *vc, struct vgz *vg, enum vgzret_e e) |
| 408 |
|
{ |
| 409 |
|
char *p; |
| 410 |
|
intmax_t ii; |
| 411 |
|
|
| 412 |
50202 |
CHECK_OBJ_NOTNULL(vg, VGZ_MAGIC); |
| 413 |
50202 |
if (e < VGZ_OK) |
| 414 |
0 |
return; |
| 415 |
50202 |
ii = vg->vz.start_bit + vg->vz.last_bit + vg->vz.stop_bit; |
| 416 |
50202 |
if (e != VGZ_END && ii == vg->bits) |
| 417 |
36918 |
return; |
| 418 |
13284 |
vg->bits = ii; |
| 419 |
13284 |
p = ObjSetAttr(vc->wrk, vc->oc, OA_GZIPBITS, 32, NULL); |
| 420 |
13284 |
AN(p); |
| 421 |
13284 |
vbe64enc(p, vg->vz.start_bit); |
| 422 |
13284 |
vbe64enc(p + 8, vg->vz.last_bit); |
| 423 |
13284 |
vbe64enc(p + 16, vg->vz.stop_bit); |
| 424 |
13284 |
if (e != VGZ_END) |
| 425 |
5084 |
return; |
| 426 |
8200 |
if (vg->dir == VGZ_GZ) |
| 427 |
6960 |
vbe64enc(p + 24, vg->vz.total_in); |
| 428 |
8200 |
if (vg->dir == VGZ_UN) |
| 429 |
1240 |
vbe64enc(p + 24, vg->vz.total_out); |
| 430 |
50202 |
} |
| 431 |
|
|
| 432 |
|
/*-------------------------------------------------------------------- |
| 433 |
|
*/ |
| 434 |
|
|
| 435 |
|
enum vgzret_e |
| 436 |
12920 |
VGZ_Destroy(struct vgz **vgp) |
| 437 |
|
{ |
| 438 |
|
struct vgz *vg; |
| 439 |
|
enum vgzret_e vr; |
| 440 |
|
int i; |
| 441 |
|
|
| 442 |
12920 |
TAKE_OBJ_NOTNULL(vg, vgp, VGZ_MAGIC); |
| 443 |
12920 |
AN(vg->id); |
| 444 |
25840 |
VSLb(vg->vsl, SLT_Gzip, "%s %jd %jd %jd %jd %jd", |
| 445 |
12920 |
vg->id, |
| 446 |
12920 |
(intmax_t)vg->vz.total_in, |
| 447 |
12920 |
(intmax_t)vg->vz.total_out, |
| 448 |
12920 |
(intmax_t)vg->vz.start_bit, |
| 449 |
12920 |
(intmax_t)vg->vz.last_bit, |
| 450 |
12920 |
(intmax_t)vg->vz.stop_bit); |
| 451 |
12920 |
if (vg->dir == VGZ_GZ) |
| 452 |
3680 |
i = deflateEnd(&vg->vz); |
| 453 |
|
else |
| 454 |
9240 |
i = inflateEnd(&vg->vz); |
| 455 |
12920 |
if (vg->last_i == Z_STREAM_END && i == Z_OK) |
| 456 |
10320 |
i = Z_STREAM_END; |
| 457 |
12920 |
if (vg->m_buf) |
| 458 |
9880 |
free(vg->m_buf); |
| 459 |
12920 |
if (i == Z_OK) |
| 460 |
2520 |
vr = VGZ_OK; |
| 461 |
10400 |
else if (i == Z_STREAM_END) |
| 462 |
10320 |
vr = VGZ_END; |
| 463 |
80 |
else if (i == Z_BUF_ERROR) |
| 464 |
0 |
vr = VGZ_STUCK; |
| 465 |
|
else { |
| 466 |
160 |
VSLb(vg->vsl, SLT_Gzip, "G(un)zip error: %d (%s)", |
| 467 |
80 |
i, vgz_msg(vg)); |
| 468 |
80 |
vr = VGZ_ERROR; |
| 469 |
|
} |
| 470 |
12920 |
FREE_OBJ(vg); |
| 471 |
12920 |
return (vr); |
| 472 |
|
} |
| 473 |
|
|
| 474 |
|
/*--------------------------------------------------------------------*/ |
| 475 |
|
|
| 476 |
|
static enum vfp_status v_matchproto_(vfp_init_f) |
| 477 |
7000 |
vfp_gzip_init(VRT_CTX, struct vfp_ctx *vc, struct vfp_entry *vfe) |
| 478 |
|
{ |
| 479 |
|
struct vgz *vg; |
| 480 |
|
|
| 481 |
7000 |
CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC); |
| 482 |
7000 |
CHECK_OBJ_NOTNULL(vc, VFP_CTX_MAGIC); |
| 483 |
7000 |
CHECK_OBJ_NOTNULL(vfe, VFP_ENTRY_MAGIC); |
| 484 |
|
|
| 485 |
|
/* |
| 486 |
|
* G(un)zip makes no sence on partial responses, but since |
| 487 |
|
* it is an pure 1:1 transform, we can just ignore it. |
| 488 |
|
*/ |
| 489 |
7000 |
if (http_GetStatus(vc->resp) == 206) |
| 490 |
160 |
return (VFP_NULL); |
| 491 |
|
|
| 492 |
6840 |
if (vfe->vfp == &VFP_gzip) { |
| 493 |
640 |
if (http_GetHdr(vc->resp, H_Content_Encoding, NULL)) |
| 494 |
0 |
return (VFP_NULL); |
| 495 |
640 |
vg = VGZ_NewGzip(vc->wrk->vsl, vfe->vfp->priv1); |
| 496 |
640 |
vc->obj_flags |= OF_GZIPED | OF_CHGCE; |
| 497 |
640 |
} else { |
| 498 |
6200 |
if (!http_HdrIs(vc->resp, H_Content_Encoding, "gzip")) |
| 499 |
0 |
return (VFP_NULL); |
| 500 |
6200 |
if (vfe->vfp == &VFP_gunzip) { |
| 501 |
5000 |
vg = VGZ_NewGunzip(vc->wrk->vsl, vfe->vfp->priv1); |
| 502 |
5000 |
vc->obj_flags &= ~OF_GZIPED; |
| 503 |
5000 |
vc->obj_flags |= OF_CHGCE; |
| 504 |
5000 |
} else { |
| 505 |
1200 |
vg = VGZ_NewTestGunzip(vc->wrk->vsl, vfe->vfp->priv1); |
| 506 |
1200 |
vc->obj_flags |= OF_GZIPED; |
| 507 |
|
} |
| 508 |
|
} |
| 509 |
6840 |
AN(vg); |
| 510 |
6840 |
vfe->priv1 = vg; |
| 511 |
6840 |
if (vgz_getmbuf(vg)) |
| 512 |
0 |
return (VFP_ERROR); |
| 513 |
6840 |
VGZ_Ibuf(vg, vg->m_buf, 0); |
| 514 |
6840 |
AZ(vg->m_len); |
| 515 |
|
|
| 516 |
6840 |
if (vfe->vfp == &VFP_gunzip || vfe->vfp == &VFP_gzip) { |
| 517 |
5640 |
http_Unset(vc->resp, H_Content_Encoding); |
| 518 |
5640 |
http_Unset(vc->resp, H_Content_Length); |
| 519 |
5640 |
RFC2616_Weaken_Etag(vc->resp); |
| 520 |
5640 |
} |
| 521 |
|
|
| 522 |
6840 |
if (vfe->vfp == &VFP_gzip) |
| 523 |
640 |
http_SetHeader(vc->resp, "Content-Encoding: gzip"); |
| 524 |
|
|
| 525 |
6840 |
if (vfe->vfp == &VFP_gzip || vfe->vfp == &VFP_testgunzip) |
| 526 |
1840 |
RFC2616_Vary_AE(vc->resp); |
| 527 |
|
|
| 528 |
6840 |
return (VFP_OK); |
| 529 |
7000 |
} |
| 530 |
|
|
| 531 |
|
/*-------------------------------------------------------------------- |
| 532 |
|
* VFP_GUNZIP |
| 533 |
|
* |
| 534 |
|
* A VFP for gunzip'ing an object as we receive it from the backend |
| 535 |
|
*/ |
| 536 |
|
|
| 537 |
|
static enum vfp_status v_matchproto_(vfp_pull_f) |
| 538 |
18451 |
vfp_gunzip_pull(struct vfp_ctx *vc, struct vfp_entry *vfe, void *p, |
| 539 |
|
ssize_t *lp) |
| 540 |
|
{ |
| 541 |
|
ssize_t l; |
| 542 |
|
struct vgz *vg; |
| 543 |
18451 |
enum vgzret_e vr = VGZ_ERROR; |
| 544 |
|
const void *dp; |
| 545 |
|
ssize_t dl; |
| 546 |
18451 |
enum vfp_status vp = VFP_OK; |
| 547 |
|
|
| 548 |
18451 |
CHECK_OBJ_NOTNULL(vc, VFP_CTX_MAGIC); |
| 549 |
18451 |
CHECK_OBJ_NOTNULL(vfe, VFP_ENTRY_MAGIC); |
| 550 |
18451 |
CAST_OBJ_NOTNULL(vg, vfe->priv1, VGZ_MAGIC); |
| 551 |
18451 |
AN(p); |
| 552 |
18451 |
AN(lp); |
| 553 |
18451 |
l = *lp; |
| 554 |
18451 |
*lp = 0; |
| 555 |
18451 |
VGZ_Obuf(vg, p, l); |
| 556 |
18451 |
do { |
| 557 |
18531 |
if (VGZ_IbufEmpty(vg)) { |
| 558 |
5800 |
l = vg->m_sz; |
| 559 |
5800 |
vp = VFP_Suck(vc, vg->m_buf, &l); |
| 560 |
5800 |
if (vp == VFP_ERROR) |
| 561 |
0 |
return (vp); |
| 562 |
5800 |
VGZ_Ibuf(vg, vg->m_buf, l); |
| 563 |
5800 |
} |
| 564 |
18531 |
if (!VGZ_IbufEmpty(vg) || vp == VFP_END) { |
| 565 |
18531 |
vr = VGZ_Gunzip(vg, &dp, &dl); |
| 566 |
18531 |
if (vr == VGZ_END && !VGZ_IbufEmpty(vg)) |
| 567 |
40 |
return (VFP_Error(vc, "Junk after gzip data")); |
| 568 |
18491 |
if (vr < VGZ_OK) |
| 569 |
160 |
return (VFP_Error(vc, |
| 570 |
80 |
"Invalid Gzip data: %s", vgz_msg(vg))); |
| 571 |
18411 |
if (dl > 0) { |
| 572 |
15531 |
*lp = dl; |
| 573 |
15531 |
assert(dp == p); |
| 574 |
15531 |
return (VFP_OK); |
| 575 |
|
} |
| 576 |
2880 |
} |
| 577 |
2880 |
AN(VGZ_IbufEmpty(vg)); |
| 578 |
2880 |
} while (vp == VFP_OK); |
| 579 |
2800 |
if (vr != VGZ_END) |
| 580 |
40 |
return (VFP_Error(vc, "Gunzip error at the very end")); |
| 581 |
2760 |
return (vp); |
| 582 |
18451 |
} |
| 583 |
|
|
| 584 |
|
|
| 585 |
|
/*-------------------------------------------------------------------- |
| 586 |
|
* VFP_GZIP |
| 587 |
|
* |
| 588 |
|
* A VFP for gzip'ing an object as we receive it from the backend |
| 589 |
|
*/ |
| 590 |
|
|
| 591 |
|
static enum vfp_status v_matchproto_(vfp_pull_f) |
| 592 |
2520 |
vfp_gzip_pull(struct vfp_ctx *vc, struct vfp_entry *vfe, void *p, |
| 593 |
|
ssize_t *lp) |
| 594 |
|
{ |
| 595 |
|
ssize_t l; |
| 596 |
|
struct vgz *vg; |
| 597 |
2520 |
enum vgzret_e vr = VGZ_ERROR; |
| 598 |
|
const void *dp; |
| 599 |
|
ssize_t dl; |
| 600 |
2520 |
enum vfp_status vp = VFP_ERROR; |
| 601 |
|
|
| 602 |
2520 |
CHECK_OBJ_NOTNULL(vc, VFP_CTX_MAGIC); |
| 603 |
2520 |
CHECK_OBJ_NOTNULL(vfe, VFP_ENTRY_MAGIC); |
| 604 |
2520 |
CAST_OBJ_NOTNULL(vg, vfe->priv1, VGZ_MAGIC); |
| 605 |
2520 |
AN(p); |
| 606 |
2520 |
AN(lp); |
| 607 |
2520 |
l = *lp; |
| 608 |
2520 |
*lp = 0; |
| 609 |
2520 |
VGZ_Obuf(vg, p, l); |
| 610 |
2520 |
do { |
| 611 |
2680 |
if (VGZ_IbufEmpty(vg)) { |
| 612 |
2520 |
l = vg->m_sz; |
| 613 |
2520 |
vp = VFP_Suck(vc, vg->m_buf, &l); |
| 614 |
2520 |
if (vp == VFP_ERROR) |
| 615 |
0 |
break; |
| 616 |
2520 |
if (vp == VFP_END) |
| 617 |
880 |
vg->flag = VGZ_FINISH; |
| 618 |
2520 |
VGZ_Ibuf(vg, vg->m_buf, l); |
| 619 |
2520 |
} |
| 620 |
2680 |
if (!VGZ_IbufEmpty(vg) || vg->flag == VGZ_FINISH) { |
| 621 |
2680 |
vr = VGZ_Gzip(vg, &dp, &dl, vg->flag); |
| 622 |
2680 |
if (vr < VGZ_OK) |
| 623 |
0 |
return (VFP_Error(vc, "Gzip failed")); |
| 624 |
2680 |
if (dl > 0) { |
| 625 |
2520 |
VGZ_UpdateObj(vc, vg, vr); |
| 626 |
2520 |
*lp = dl; |
| 627 |
2520 |
assert(dp == p); |
| 628 |
2520 |
if (vr != VGZ_END || !VGZ_IbufEmpty(vg)) |
| 629 |
1920 |
return (VFP_OK); |
| 630 |
600 |
} |
| 631 |
760 |
} |
| 632 |
760 |
AN(VGZ_IbufEmpty(vg)); |
| 633 |
760 |
} while (vg->flag != VGZ_FINISH); |
| 634 |
|
|
| 635 |
600 |
if (vr != VGZ_END) |
| 636 |
0 |
return (VFP_Error(vc, "Gzip failed")); |
| 637 |
600 |
VGZ_UpdateObj(vc, vg, VGZ_END); |
| 638 |
600 |
return (VFP_END); |
| 639 |
2520 |
} |
| 640 |
|
|
| 641 |
|
/*-------------------------------------------------------------------- |
| 642 |
|
* VFP_TESTGZIP |
| 643 |
|
* |
| 644 |
|
* A VFP for testing that received gzip data is valid, and for |
| 645 |
|
* collecting the magic bits while we're at it. |
| 646 |
|
*/ |
| 647 |
|
|
| 648 |
|
static enum vfp_status v_matchproto_(vfp_pull_f) |
| 649 |
1564 |
vfp_testgunzip_pull(struct vfp_ctx *vc, struct vfp_entry *vfe, void *p, |
| 650 |
|
ssize_t *lp) |
| 651 |
|
{ |
| 652 |
|
struct vgz *vg; |
| 653 |
1564 |
enum vgzret_e vr = VGZ_ERROR; |
| 654 |
|
const void *dp; |
| 655 |
|
ssize_t dl; |
| 656 |
|
enum vfp_status vp; |
| 657 |
|
|
| 658 |
1564 |
CHECK_OBJ_NOTNULL(vc, VFP_CTX_MAGIC); |
| 659 |
1564 |
CHECK_OBJ_NOTNULL(vfe, VFP_ENTRY_MAGIC); |
| 660 |
1564 |
CAST_OBJ_NOTNULL(vg, vfe->priv1, VGZ_MAGIC); |
| 661 |
1564 |
AN(p); |
| 662 |
1564 |
AN(lp); |
| 663 |
1564 |
vp = VFP_Suck(vc, p, lp); |
| 664 |
1564 |
if (vp == VFP_ERROR) |
| 665 |
80 |
return (vp); |
| 666 |
1484 |
if (*lp > 0 || vp == VFP_END) { |
| 667 |
1484 |
VGZ_Ibuf(vg, p, *lp); |
| 668 |
1484 |
do { |
| 669 |
1484 |
VGZ_Obuf(vg, vg->m_buf, vg->m_sz); |
| 670 |
1484 |
vr = VGZ_Gunzip(vg, &dp, &dl); |
| 671 |
1484 |
if (vr == VGZ_END && !VGZ_IbufEmpty(vg)) |
| 672 |
120 |
return (VFP_Error(vc, "Junk after gzip data")); |
| 673 |
1364 |
if (vr < VGZ_OK) |
| 674 |
0 |
return (VFP_Error(vc, |
| 675 |
0 |
"Invalid Gzip data: %s", vgz_msg(vg))); |
| 676 |
1364 |
} while (!VGZ_IbufEmpty(vg)); |
| 677 |
1364 |
} |
| 678 |
1364 |
VGZ_UpdateObj(vc, vg, vr); |
| 679 |
1364 |
if (vp == VFP_END && vr != VGZ_END) |
| 680 |
40 |
return (VFP_Error(vc, "tGunzip failed")); |
| 681 |
1324 |
return (vp); |
| 682 |
1564 |
} |
| 683 |
|
|
| 684 |
|
/*--------------------------------------------------------------------*/ |
| 685 |
|
|
| 686 |
|
static void v_matchproto_(vfp_fini_f) |
| 687 |
7440 |
vfp_gzip_fini(struct vfp_ctx *vc, struct vfp_entry *vfe) |
| 688 |
|
{ |
| 689 |
|
struct vgz *vg; |
| 690 |
|
|
| 691 |
7440 |
CHECK_OBJ_NOTNULL(vc, VFP_CTX_MAGIC); |
| 692 |
7440 |
CHECK_OBJ_NOTNULL(vfe, VFP_ENTRY_MAGIC); |
| 693 |
|
|
| 694 |
7440 |
if (vfe->priv1 != NULL) { |
| 695 |
6840 |
TAKE_OBJ_NOTNULL(vg, &vfe->priv1, VGZ_MAGIC); |
| 696 |
6840 |
(void)VGZ_Destroy(&vg); |
| 697 |
6840 |
} |
| 698 |
7440 |
} |
| 699 |
|
|
| 700 |
|
/*--------------------------------------------------------------------*/ |
| 701 |
|
|
| 702 |
|
const struct vfp VFP_gunzip = { |
| 703 |
|
.name = "gunzip", |
| 704 |
|
.init = vfp_gzip_init, |
| 705 |
|
.pull = vfp_gunzip_pull, |
| 706 |
|
.fini = vfp_gzip_fini, |
| 707 |
|
.priv1 = "U F -", |
| 708 |
|
}; |
| 709 |
|
|
| 710 |
|
const struct vfp VFP_gzip = { |
| 711 |
|
.name = "gzip", |
| 712 |
|
.init = vfp_gzip_init, |
| 713 |
|
.pull = vfp_gzip_pull, |
| 714 |
|
.fini = vfp_gzip_fini, |
| 715 |
|
.priv1 = "G F -", |
| 716 |
|
}; |
| 717 |
|
|
| 718 |
|
const struct vfp VFP_testgunzip = { |
| 719 |
|
.name = "testgunzip", |
| 720 |
|
.init = vfp_gzip_init, |
| 721 |
|
.pull = vfp_testgunzip_pull, |
| 722 |
|
.fini = vfp_gzip_fini, |
| 723 |
|
.priv1 = "u F -", |
| 724 |
|
}; |