GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2016 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 *
 */

#include "config.h"

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>

#include "cache_varnishd.h"
#include "cache_vcl.h"
#include "vrt_obj.h"

#include "vct.h"

#include "cache_filter.h"

/*--------------------------------------------------------------------
 */

struct vfilter {
        unsigned                        magic;
#define VFILTER_MAGIC                   0xd40894e9
        const struct vfp                *vfp;
        const struct vdp                *vdp;
        const char                      *name;
        int                             nlen;
        VTAILQ_ENTRY(vfilter)           list;
};

static struct vfilter_head vrt_filters =
    VTAILQ_HEAD_INITIALIZER(vrt_filters);

static const char *
is_dup_filter(const struct vfilter_head *head, const struct vfp * vfp,
    const struct vdp *vdp, const char *name)
{
        struct vfilter *vp;
        VTAILQ_FOREACH(vp, head, list) {
                if (vfp != NULL && vp->vfp != NULL) {
                        if (vp->vfp == vfp)
                                return ("VFP already registered");
                        if (!strcasecmp(vp->name, name))
                                return ("VFP name already used");
                }
                if (vdp != NULL && vp->vdp != NULL) {
                        if (vp->vdp == vdp)
                                return ("VDP already registered");
                        if (!strcasecmp(vp->name, name))
                                return ("VDP name already used");
                }
        }
        return (NULL);
}

static const char *
vrt_addfilter(VRT_CTX, const struct vfp *vfp, const struct vdp *vdp)
{
        struct vfilter *vp;
        struct vfilter_head *hd = &vrt_filters;
        const char *err, *name = NULL;

        CHECK_OBJ_ORNULL(ctx, VRT_CTX_MAGIC);
        assert(vfp != NULL || vdp != NULL);
        assert(vfp == NULL || vfp->name != NULL);
        assert(vdp == NULL || vdp->name != NULL);
        assert(vfp == NULL || vdp == NULL || !strcasecmp(vfp->name, vdp->name));
        if (vfp != NULL)
                name = vfp->name;
        else if (vdp != NULL)
                name = vdp->name;
        AN(name);

        err = is_dup_filter(hd, vfp, vdp, name);
        if (err != NULL) {
                if (ctx != NULL)
                        VRT_fail(ctx, "%s: %s (global)", name, err);
                return (err);
        }
        if (ctx != NULL) {
                ASSERT_CLI();
                CHECK_OBJ_NOTNULL(ctx->vcl, VCL_MAGIC);
                hd = &ctx->vcl->filters;
                err = is_dup_filter(hd, vfp, vdp, name);
                if (err != NULL) {
                        VRT_fail(ctx, "%s: %s (per-vcl)", name, err);
                        return (err);
                }
        }

        ALLOC_OBJ(vp, VFILTER_MAGIC);
        AN(vp);
        vp->vfp = vfp;
        vp->vdp = vdp;
        vp->name = name;
        vp->nlen = strlen(name);
        VTAILQ_INSERT_TAIL(hd, vp, list);
        return (err);
}

const char *
VRT_AddFilter(VRT_CTX, const struct vfp *vfp, const struct vdp *vdp)
{

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        return (vrt_addfilter(ctx, vfp, vdp));
}

void
VRT_AddVFP(VRT_CTX, const struct vfp *filter)
{
        AZ(VRT_AddFilter(ctx, filter, NULL));
}

void
VRT_AddVDP(VRT_CTX, const struct vdp *filter)
{
        AZ(VRT_AddFilter(ctx, NULL, filter));
}

void
VRT_RemoveFilter(VRT_CTX, const struct vfp *vfp, const struct vdp *vdp)
{
        struct vfilter *vp;
        struct vfilter_head *hd;

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        CHECK_OBJ_NOTNULL(ctx->vcl, VCL_MAGIC);
        hd = &ctx->vcl->filters;
        assert(vfp != NULL || vdp != NULL);
        assert(vfp == NULL || vfp->name != NULL);
        assert(vdp == NULL || vdp->name != NULL);
        assert(vfp == NULL || vdp == NULL || !strcasecmp(vfp->name, vdp->name));

        ASSERT_CLI();
        VTAILQ_FOREACH(vp, hd, list) {
                CHECK_OBJ_NOTNULL(vp, VFILTER_MAGIC);
                if (vp->vfp == vfp && vp->vdp == vdp)
                        break;
        }
        AN(vp);
        assert(vfp == NULL || !strcasecmp(vfp->name, vp->name));
        assert(vdp == NULL || !strcasecmp(vdp->name, vp->name));
        VTAILQ_REMOVE(hd, vp, list);
        FREE_OBJ(vp);
}

void
VRT_RemoveVFP(VRT_CTX, const struct vfp *filter)
{

        VRT_RemoveFilter(ctx, filter, NULL);
}

void
VRT_RemoveVDP(VRT_CTX, const struct vdp *filter)
{

        VRT_RemoveFilter(ctx, NULL, filter);
}

static const struct vfilter vfilter_error[1];

// XXX: idea(fgs): Allow filters (...) arguments in the list
static const struct vfilter *
vcl_filter_list_iter(int want_vfp, const struct vfilter_head *h1,
    const struct vfilter_head *h2, const char **flp)
{
        const char *fl, *q;
        const struct vfilter *vp;

        AN(h1);
        AN(h2);
        AN(flp);

        fl = *flp;
        AN(fl);

        while (vct_isspace(*fl))
                fl++;
        if (*fl == '\0') {
                *flp = NULL;
                return (NULL);
        }
        for (q = fl; *q && !vct_isspace(*q); q++)
                continue;
        *flp = q;
        VTAILQ_FOREACH(vp, h1, list) {
                if (want_vfp && vp->vfp == NULL)
                        continue;
                else if (!want_vfp && vp->vdp == NULL)
                        continue;
                if (vp->nlen == q - fl && !memcmp(fl, vp->name, vp->nlen))
                        return (vp);
        }
        VTAILQ_FOREACH(vp, h2, list) {
                if (want_vfp && vp->vfp == NULL)
                        continue;
                else if (!want_vfp && vp->vdp == NULL)
                        continue;
                if (vp->nlen == q - fl && !memcmp(fl, vp->name, vp->nlen))
                        return (vp);
        }
        *flp = fl;
        return (vfilter_error);
}

int
VCL_StackVFP(struct vfp_ctx *vc, const struct vcl *vcl, const char *fl)
{
        const struct vfilter *vp;

        AN(fl);
        VSLbs(vc->wrk->vsl, SLT_Filters, TOSTRAND(fl));

        while (1) {
                vp = vcl_filter_list_iter(1, &vrt_filters, &vcl->filters, &fl);
                if (vp == NULL)
                        return (0);
                if (vp == vfilter_error)
                        return (VFP_Error(vc, "Filter '...%s' not found", fl));
                if (VFP_Push(vc, vp->vfp) == NULL)
                        return (-1);
        }
}

int
VCL_StackVDP(struct req *req, const struct vcl *vcl, const char *fl)
{
        const struct vfilter *vp;
        struct vrt_ctx ctx[1];

        AN(fl);
        VSLbs(req->vsl, SLT_Filters, TOSTRAND(fl));
        INIT_OBJ(ctx, VRT_CTX_MAGIC);
        VCL_Req2Ctx(ctx, req);

        while (1) {
                vp = vcl_filter_list_iter(0, &vrt_filters, &vcl->filters, &fl);
                if (vp == NULL)
                        return (0);
                if (vp == vfilter_error) {
                        VSLb(req->vsl, SLT_Error,
                            "Filter '...%s' not found", fl);
                        return (-1);
                }
                if (VDP_Push(ctx, req->vdc, req->ws, vp->vdp, NULL))
                        return (-1);
        }
}

void
VCL_VRT_Init(void)
{
        AZ(vrt_addfilter(NULL, &VFP_testgunzip, NULL));
        AZ(vrt_addfilter(NULL, &VFP_gunzip, NULL));
        AZ(vrt_addfilter(NULL, &VFP_gzip, NULL));
        AZ(vrt_addfilter(NULL, &VFP_esi, NULL));
        AZ(vrt_addfilter(NULL, &VFP_esi_gzip, NULL));
        AZ(vrt_addfilter(NULL, NULL, &VDP_esi));
        AZ(vrt_addfilter(NULL, NULL, &VDP_gunzip));
        AZ(vrt_addfilter(NULL, NULL, &VDP_range));
}

/*--------------------------------------------------------------------
 */

typedef void filter_list_t(void *, struct vsb *vsb);

static const char *
filter_on_ws(struct ws *ws, filter_list_t *func, void *arg)
{
        struct vsb vsb[1];
        const char *p;

        AN(func);
        AN(arg);
        WS_VSB_new(vsb, ws);
        func(arg, vsb);
        p = WS_VSB_finish(vsb, ws, NULL);
        if (p == NULL)
                p = "";
        return (p);
}

/*--------------------------------------------------------------------
 */

static void v_matchproto_(filter_list_t)
vbf_default_filter_list(void *arg, struct vsb *vsb)
{
        const struct busyobj *bo;
        const char *p;
        int do_gzip, do_gunzip, is_gzip = 0, is_gunzip = 0;

        CAST_OBJ_NOTNULL(bo, arg, BUSYOBJ_MAGIC);

        do_gzip = bo->do_gzip;
        do_gunzip = bo->do_gunzip;

        /*
         * The VCL variables beresp.do_g[un]zip tells us how we want the
         * object processed before it is stored.
         *
         * The backend Content-Encoding header tells us what we are going
         * to receive, which we classify in the following three classes:
         *
         *      "Content-Encoding: gzip"        --> object is gzip'ed.
         *      no Content-Encoding             --> object is not gzip'ed.
         *      anything else                   --> do nothing wrt gzip
         */

        /* No body -> done */
        if (bo->htc->body_status == BS_NONE || bo->htc->content_length == 0)
                return;

        if (!cache_param->http_gzip_support)
                do_gzip = do_gunzip = 0;

        if (http_GetHdr(bo->beresp, H_Content_Encoding, &p))
                is_gzip = !strcasecmp(p, "gzip");
        else
                is_gunzip = 1;

        /* We won't gunzip unless it is gzip'ed */
        if (do_gunzip && !is_gzip)
                do_gunzip = 0;

        /* We wont gzip unless if it already is gzip'ed */
        if (do_gzip && !is_gunzip)
                do_gzip = 0;

        if (do_gunzip || (is_gzip && bo->do_esi))
                VSB_cat(vsb, " gunzip");

        if (bo->do_esi && (do_gzip || (is_gzip && !do_gunzip))) {
                VSB_cat(vsb, " esi_gzip");
                return;
        }

        if (bo->do_esi) {
                VSB_cat(vsb, " esi");
                return;
        }

        if (do_gzip)
                VSB_cat(vsb, " gzip");

        if (is_gzip && !do_gunzip)
                VSB_cat(vsb, " testgunzip");
}

const char *
VBF_Get_Filter_List(struct busyobj *bo)
{

        CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
        return (filter_on_ws(bo->ws, vbf_default_filter_list, bo));
}

/*--------------------------------------------------------------------
 */

static void v_matchproto_(filter_list_t)
resp_default_filter_list(void *arg, struct vsb *vsb)
{
        struct req *req;

        CAST_OBJ_NOTNULL(req, arg, REQ_MAGIC);

        if (!req->disable_esi && req->objcore != NULL &&
            ObjHasAttr(req->wrk, req->objcore, OA_ESIDATA))
                VSB_cat(vsb, " esi");

        if (cache_param->http_gzip_support &&
            req->objcore != NULL &&
            ObjCheckFlag(req->wrk, req->objcore, OF_GZIPED) &&
            !RFC2616_Req_Gzip(req->http))
                VSB_cat(vsb, " gunzip");

        if (cache_param->http_range_support &&
            http_GetStatus(req->resp) == 200 &&
            http_GetHdr(req->http, H_Range, NULL))
                VSB_cat(vsb, " range");
}

const char *
resp_Get_Filter_List(struct req *req)
{
        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
        return (filter_on_ws(req->ws, resp_default_filter_list, req));
}

/*--------------------------------------------------------------------*/

#define FILTER_VAR(vcl, in, func, fld)                                  \
        VCL_STRING                                                      \
        VRT_r_##vcl##_filters(VRT_CTX)                                  \
        {                                                               \
                                                                        \
                CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);                  \
                if (ctx->in->fld != NULL)                               \
                        return(ctx->in->fld);                           \
                return (func(ctx->in));                                 \
        }                                                               \
                                                                        \
        VCL_VOID                                                        \
        VRT_l_##vcl##_filters(VRT_CTX, const char *str, VCL_STRANDS s)  \
        {                                                               \
                const char *b;                                          \
                                                                        \
                (void)str;                                              \
                CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);                  \
                b = VRT_StrandsWS(ctx->in->ws, str, s);                 \
                if (b == NULL)                                          \
                        WS_MarkOverflow(ctx->in->ws);                   \
                else                                                    \
                        ctx->in->fld = b;                               \
        }

FILTER_VAR(beresp, bo, VBF_Get_Filter_List, vfp_filter_list)
FILTER_VAR(resp, req, resp_Get_Filter_List, vdp_filter_list)

		varnish-cache/bin/varnishd/cache/cache_vrt_filter.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2016 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*
30		*/
31
32		#include "config.h"
33
34		#include <stdio.h>
35		#include <stdint.h>
36		#include <stdlib.h>
37
38		#include "cache_varnishd.h"
39		#include "cache_vcl.h"
40		#include "vrt_obj.h"
41
42		#include "vct.h"
43
44		#include "cache_filter.h"
45
46		/*--------------------------------------------------------------------
47		*/
48
49		struct vfilter {
50		unsigned magic;
51		#define VFILTER_MAGIC 0xd40894e9
52		const struct vfp *vfp;
53		const struct vdp *vdp;
54		const char *name;
55		int nlen;
56		VTAILQ_ENTRY(vfilter) list;
57		};
58
59		static struct vfilter_head vrt_filters =
60		VTAILQ_HEAD_INITIALIZER(vrt_filters);
61
62		static const char *
63	187226	is_dup_filter(const struct vfilter_head head, const struct vfp vfp,
64		const struct vdp vdp, const char name)
65		{
66		struct vfilter *vp;
67	849742	VTAILQ_FOREACH(vp, head, list) {
68	662541	if (vfp != NULL && vp->vfp != NULL) {
69	234120	if (vp->vfp == vfp)
70	25	return ("VFP already registered");
71	234095	if (!strcasecmp(vp->name, name))
72	0	return ("VFP name already used");
73	234095	}
74	662516	if (vdp != NULL && vp->vdp != NULL) {
75	83466	if (vp->vdp == vdp)
76	0	return ("VDP already registered");
77	83466	if (!strcasecmp(vp->name, name))
78	0	return ("VDP name already used");
79	83466	}
80	662516	}
81	187201	return (NULL);
82	187226	}
83
84		static const char *
85	182401	vrt_addfilter(VRT_CTX, const struct vfp vfp, const struct vdp vdp)
86		{
87		struct vfilter *vp;
88	182401	struct vfilter_head *hd = &vrt_filters;
89	182401	const char err, name = NULL;
90
91	182401	CHECK_OBJ_ORNULL(ctx, VRT_CTX_MAGIC);
92	182401	assert(vfp != NULL \|\| vdp != NULL);
93	182401	assert(vfp == NULL \|\| vfp->name != NULL);
94	182401	assert(vdp == NULL \|\| vdp->name != NULL);
95	182401	assert(vfp == NULL \|\| vdp == NULL \|\| !strcasecmp(vfp->name, vdp->name));
96	182401	if (vfp != NULL)
97	113410	name = vfp->name;
98	68991	else if (vdp != NULL)
99	68991	name = vdp->name;
100	182401	AN(name);
101
102	182401	err = is_dup_filter(hd, vfp, vdp, name);
103	182401	if (err != NULL) {
104	0	if (ctx != NULL)
105	0	VRT_fail(ctx, "%s: %s (global)", name, err);
106	0	return (err);
107		}
108	182401	if (ctx != NULL) {
109	4825	ASSERT_CLI();
110	4825	CHECK_OBJ_NOTNULL(ctx->vcl, VCL_MAGIC);
111	4825	hd = &ctx->vcl->filters;
112	4825	err = is_dup_filter(hd, vfp, vdp, name);
113	4825	if (err != NULL) {
114	25	VRT_fail(ctx, "%s: %s (per-vcl)", name, err);
115	25	return (err);
116		}
117	4800	}
118
119	182376	ALLOC_OBJ(vp, VFILTER_MAGIC);
120	182376	AN(vp);
121	182376	vp->vfp = vfp;
122	182376	vp->vdp = vdp;
123	182376	vp->name = name;
124	182376	vp->nlen = strlen(name);
125	182376	VTAILQ_INSERT_TAIL(hd, vp, list);
126	182376	return (err);
127	182401	}
128
129		const char *
130	4825	VRT_AddFilter(VRT_CTX, const struct vfp vfp, const struct vdp vdp)
131		{
132
133	4825	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
134	4825	return (vrt_addfilter(ctx, vfp, vdp));
135		}
136
137		void
138	0	VRT_AddVFP(VRT_CTX, const struct vfp *filter)
139		{
140	0	AZ(VRT_AddFilter(ctx, filter, NULL));
141	0	}
142
143		void
144	0	VRT_AddVDP(VRT_CTX, const struct vdp *filter)
145		{
146	0	AZ(VRT_AddFilter(ctx, NULL, filter));
147	0	}
148
149		void
150	1150	VRT_RemoveFilter(VRT_CTX, const struct vfp vfp, const struct vdp vdp)
151		{
152		struct vfilter *vp;
153		struct vfilter_head *hd;
154
155	1150	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
156	1150	CHECK_OBJ_NOTNULL(ctx->vcl, VCL_MAGIC);
157	1150	hd = &ctx->vcl->filters;
158	1150	assert(vfp != NULL \|\| vdp != NULL);
159	1150	assert(vfp == NULL \|\| vfp->name != NULL);
160	1150	assert(vdp == NULL \|\| vdp->name != NULL);
161	1150	assert(vfp == NULL \|\| vdp == NULL \|\| !strcasecmp(vfp->name, vdp->name));
162
163	1150	ASSERT_CLI();
164	1150	VTAILQ_FOREACH(vp, hd, list) {
165	1150	CHECK_OBJ_NOTNULL(vp, VFILTER_MAGIC);
166	1150	if (vp->vfp == vfp && vp->vdp == vdp)
167	1150	break;
168	0	}
169	1150	AN(vp);
170	1150	assert(vfp == NULL \|\| !strcasecmp(vfp->name, vp->name));
171	1150	assert(vdp == NULL \|\| !strcasecmp(vdp->name, vp->name));
172	1150	VTAILQ_REMOVE(hd, vp, list);
173	1150	FREE_OBJ(vp);
174	1150	}
175
176		void
177	0	VRT_RemoveVFP(VRT_CTX, const struct vfp *filter)
178		{
179
180	0	VRT_RemoveFilter(ctx, filter, NULL);
181	0	}
182
183		void
184	0	VRT_RemoveVDP(VRT_CTX, const struct vdp *filter)
185		{
186
187	0	VRT_RemoveFilter(ctx, NULL, filter);
188	0	}
189
190		static const struct vfilter vfilter_error[1];
191
192		// XXX: idea(fgs): Allow filters (...) arguments in the list
193		static const struct vfilter *
194	153532	vcl_filter_list_iter(int want_vfp, const struct vfilter_head *h1,
195		const struct vfilter_head h2, const char *flp)
196		{
197		const char fl, q;
198		const struct vfilter *vp;
199
200	153532	AN(h1);
201	153532	AN(h2);
202	153532	AN(flp);
203
204	153532	fl = *flp;
205	153532	AN(fl);
206
207	180004	while (vct_isspace(*fl))
208	26472	fl++;
209	153532	if (*fl == '\0') {
210	126808	*flp = NULL;
211	126808	return (NULL);
212		}
213	218011	for (q = fl; q && !vct_isspace(q); q++)
214	191287	continue;
215	26724	*flp = q;
216	153912	VTAILQ_FOREACH(vp, h1, list) {
217	147438	if (want_vfp && vp->vfp == NULL)
218	375	continue;
219	147063	else if (!want_vfp && vp->vdp == NULL)
220	73616	continue;
221	73447	if (vp->nlen == q - fl && !memcmp(fl, vp->name, vp->nlen))
222	20250	return (vp);
223	53197	}
224	12723	VTAILQ_FOREACH(vp, h2, list) {
225	12673	if (want_vfp && vp->vfp == NULL)
226	50	continue;
227	12623	else if (!want_vfp && vp->vdp == NULL)
228	0	continue;
229	12623	if (vp->nlen == q - fl && !memcmp(fl, vp->name, vp->nlen))
230	6424	return (vp);
231	6199	}
232	50	*flp = fl;
233	50	return (vfilter_error);
234	153532	}
235
236		int
237	46423	VCL_StackVFP(struct vfp_ctx vc, const struct vcl vcl, const char *fl)
238		{
239		const struct vfilter *vp;
240
241	46423	AN(fl);
242	46423	VSLbs(vc->wrk->vsl, SLT_Filters, TOSTRAND(fl));
243
244	57823	while (1) {
245	57823	vp = vcl_filter_list_iter(1, &vrt_filters, &vcl->filters, &fl);
246	57823	if (vp == NULL)
247	45823	return (0);
248	12000	if (vp == vfilter_error)
249	50	return (VFP_Error(vc, "Filter '...%s' not found", fl));
250	11950	if (VFP_Push(vc, vp->vfp) == NULL)
251	550	return (-1);
252		}
253	46423	}
254
255		int
256	84134	VCL_StackVDP(struct req req, const struct vcl vcl, const char *fl)
257		{
258		const struct vfilter *vp;
259		struct vrt_ctx ctx[1];
260
261	84134	AN(fl);
262	84134	VSLbs(req->vsl, SLT_Filters, TOSTRAND(fl));
263	84134	INIT_OBJ(ctx, VRT_CTX_MAGIC);
264	84134	VCL_Req2Ctx(ctx, req);
265
266	95709	while (1) {
267	95709	vp = vcl_filter_list_iter(0, &vrt_filters, &vcl->filters, &fl);
268	95709	if (vp == NULL)
269	80984	return (0);
270	14725	if (vp == vfilter_error) {
271	0	VSLb(req->vsl, SLT_Error,
272	0	"Filter '...%s' not found", fl);
273	0	return (-1);
274		}
275	14725	if (VDP_Push(ctx, req->vdc, req->ws, vp->vdp, NULL))
276	3150	return (-1);
277		}
278	84134	}
279
280		void
281	22197	VCL_VRT_Init(void)
282		{
283	22197	AZ(vrt_addfilter(NULL, &VFP_testgunzip, NULL));
284	22197	AZ(vrt_addfilter(NULL, &VFP_gunzip, NULL));
285	22197	AZ(vrt_addfilter(NULL, &VFP_gzip, NULL));
286	22197	AZ(vrt_addfilter(NULL, &VFP_esi, NULL));
287	22197	AZ(vrt_addfilter(NULL, &VFP_esi_gzip, NULL));
288	22197	AZ(vrt_addfilter(NULL, NULL, &VDP_esi));
289	22197	AZ(vrt_addfilter(NULL, NULL, &VDP_gunzip));
290	22197	AZ(vrt_addfilter(NULL, NULL, &VDP_range));
291	22197	}
292
293		/*--------------------------------------------------------------------
294		*/
295
296		typedef void filter_list_t(void , struct vsb vsb);
297
298		static const char *
299	114522	filter_on_ws(struct ws ws, filter_list_t func, void *arg)
300		{
301		struct vsb vsb[1];
302		const char *p;
303
304	114522	AN(func);
305	114522	AN(arg);
306	114522	WS_VSB_new(vsb, ws);
307	114522	func(arg, vsb);
308	114522	p = WS_VSB_finish(vsb, ws, NULL);
309	114522	if (p == NULL)
310	575	p = "";
311	114522	return (p);
312		}
313
314		/*--------------------------------------------------------------------
315		*/
316
317		static void v_matchproto_(filter_list_t)
318	29525	vbf_default_filter_list(void arg, struct vsb vsb)
319		{
320		const struct busyobj *bo;
321		const char *p;
322	29525	int do_gzip, do_gunzip, is_gzip = 0, is_gunzip = 0;
323
324	29525	CAST_OBJ_NOTNULL(bo, arg, BUSYOBJ_MAGIC);
325
326	29525	do_gzip = bo->do_gzip;
327	29525	do_gunzip = bo->do_gunzip;
328
329		/*
330		* The VCL variables beresp.do_g[un]zip tells us how we want the
331		* object processed before it is stored.
332		*
333		* The backend Content-Encoding header tells us what we are going
334		* to receive, which we classify in the following three classes:
335		*
336		* "Content-Encoding: gzip" --> object is gzip'ed.
337		* no Content-Encoding --> object is not gzip'ed.
338		* anything else --> do nothing wrt gzip
339		*/
340
341		/* No body -> done */
342	29525	if (bo->htc->body_status == BS_NONE \|\| bo->htc->content_length == 0)
343	6	return;
344
345	29523	if (!cache_param->http_gzip_support)
346	100	do_gzip = do_gunzip = 0;
347
348	29523	if (http_GetHdr(bo->beresp, H_Content_Encoding, &p))
349	5000	is_gzip = !strcasecmp(p, "gzip");
350		else
351	24523	is_gunzip = 1;
352
353		/* We won't gunzip unless it is gzip'ed */
354	29523	if (do_gunzip && !is_gzip)
355	50	do_gunzip = 0;
356
357		/* We wont gzip unless if it already is gzip'ed */
358	29523	if (do_gzip && !is_gunzip)
359	0	do_gzip = 0;
360
361	29523	if (do_gunzip \|\| (is_gzip && bo->do_esi))
362	3975	VSB_cat(vsb, " gunzip");
363
364	29523	if (bo->do_esi && (do_gzip \|\| (is_gzip && !do_gunzip))) {
365	4050	VSB_cat(vsb, " esi_gzip");
366	4050	return;
367		}
368
369	25473	if (bo->do_esi) {
370	3675	VSB_cat(vsb, " esi");
371	3675	return;
372		}
373
374	21798	if (do_gzip)
375	400	VSB_cat(vsb, " gzip");
376
377	21798	if (is_gzip && !do_gunzip)
378	1025	VSB_cat(vsb, " testgunzip");
379	29523	}
380
381		const char *
382	29522	VBF_Get_Filter_List(struct busyobj *bo)
383		{
384
385	29522	CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
386	29522	return (filter_on_ws(bo->ws, vbf_default_filter_list, bo));
387		}
388
389		/*--------------------------------------------------------------------
390		*/
391
392		static void v_matchproto_(filter_list_t)
393	85000	resp_default_filter_list(void arg, struct vsb vsb)
394		{
395		struct req *req;
396
397	85000	CAST_OBJ_NOTNULL(req, arg, REQ_MAGIC);
398
399	85000	if (!req->disable_esi && req->objcore != NULL &&
400	84621	ObjHasAttr(req->wrk, req->objcore, OA_ESIDATA))
401	5550	VSB_cat(vsb, " esi");
402
403	91475	if (cache_param->http_gzip_support &&
404	84795	req->objcore != NULL &&
405	84745	ObjCheckFlag(req->wrk, req->objcore, OF_GZIPED) &&
406	6475	!RFC2616_Req_Gzip(req->http))
407	2150	VSB_cat(vsb, " gunzip");
408
409	155552	if (cache_param->http_range_support &&
410	84904	http_GetStatus(req->resp) == 200 &&
411	70552	http_GetHdr(req->http, H_Range, NULL))
412	1425	VSB_cat(vsb, " range");
413	85000	}
414
415		const char *
416	85003	resp_Get_Filter_List(struct req *req)
417		{
418	85003	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
419	85003	return (filter_on_ws(req->ws, resp_default_filter_list, req));
420		}
421
422		/--------------------------------------------------------------------/
423
424		#define FILTER_VAR(vcl, in, func, fld) \
425		VCL_STRING \
426		VRT_r_##vcl##_filters(VRT_CTX) \
427		{ \
428		\
429		CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC); \
430		if (ctx->in->fld != NULL) \
431		return(ctx->in->fld); \
432		return (func(ctx->in)); \
433		} \
434		\
435		VCL_VOID \
436		VRT_l_##vcl##_filters(VRT_CTX, const char *str, VCL_STRANDS s) \
437		{ \
438		const char *b; \
439		\
440		(void)str; \
441		CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC); \
442		b = VRT_StrandsWS(ctx->in->ws, str, s); \
443		if (b == NULL) \
444		WS_MarkOverflow(ctx->in->ws); \
445		else \
446		ctx->in->fld = b; \
447		}
448
449	1050	FILTER_VAR(beresp, bo, VBF_Get_Filter_List, vfp_filter_list)
450	13549	FILTER_VAR(resp, req, resp_Get_Filter_List, vdp_filter_list)