GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2015 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 "cache/cache_varnishd.h"
#include "cache/cache_filter.h"

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

#include "vtcp.h"
#include "vtim.h"

#include "cache_http1.h"

static int
v1f_stackv1l(struct vdp_ctx *vdc, struct busyobj *bo, struct v1l *v1l)
{
        struct vrt_ctx ctx[1];

        INIT_OBJ(ctx, VRT_CTX_MAGIC);
        VCL_Bo2Ctx(ctx, bo);
        return (VDP_Push(ctx, vdc, ctx->ws, VDP_v1l, v1l));
}

/*--------------------------------------------------------------------
 * Send request to backend, including any (cached) req.body
 *
 * Return value:
 *       0 success
 *       1 failure
 */

int
V1F_SendReq(struct worker *wrk, struct busyobj *bo, uint64_t *ctr_hdrbytes,
    uint64_t *ctr_bodybytes)
{
        struct http *hp;
        stream_close_t sc;
        ssize_t i;
        uint64_t bytes, hdrbytes;
        struct http_conn *htc;
        struct vdp_ctx vdc[1] = {{ 0 }};
        intmax_t cl;
        const char *err = NULL;
        struct v1l *v1l = NULL;

        CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
        CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
        CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
        CHECK_OBJ_ORNULL(bo->req, REQ_MAGIC);
        AN(ctr_hdrbytes);
        AN(ctr_bodybytes);

        htc = bo->htc;
        assert(*htc->rfd > 0);
        hp = bo->bereq;

        if (bo->bereq_body != NULL)
                cl = ObjGetLen(wrk, bo->bereq_body);
        else if (bo->req != NULL && !bo->req->req_body_status->length_known)
                cl = -1;
        else if (bo->req != NULL) {
                cl = http_GetContentLength(bo->req->http);
                if (cl < 0)
                        cl = 0;
        }
        else
                cl = 0;

        VDP_Init(vdc, wrk, bo->vsl, NULL, bo, &cl);
        if (bo->vdp_filter_list != NULL &&
            VCL_StackVDP(vdc, bo->vcl, bo->vdp_filter_list, NULL, bo))
                err = "Failure to push processors";
        else if ((v1l = V1L_Open(wrk->aws, htc->rfd, bo->vsl, nan(""), 0)) == NULL) {
                /*      ^^^^^^^^
                 * XXX: need a send_timeout for the backend side
                 * XXX: use cache_param->http1_iovs ?
                 */
                err = "Failure to open V1L (workspace_thread overflow)";
        }
        else if (v1f_stackv1l(vdc, bo, v1l))
                err = "Failure to push V1L";

        if (err != NULL) {
                if (v1l != NULL)
                        (void) V1L_Close(&v1l, &bytes);
                if (VALID_OBJ(vdc, VDP_CTX_MAGIC))
                        (void) VDP_Close(vdc, NULL, NULL);
                VSLb(bo->vsl, SLT_FetchError, "%s", err);
                VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
                htc->doclose = SC_OVERLOAD;
                return (-1);
        }


        assert(cl >= -1);
        if (cl < 0)
                http_PrintfHeader(hp, "Transfer-Encoding: chunked");

        VTCP_blocking(*htc->rfd);       /* XXX: we should timeout instead */
        hdrbytes = HTTP1_Write(v1l, hp, HTTP1_Req);

        /* Deal with any message-body the request might (still) have */
        i = 0;

        if (bo->bereq_body != NULL) {
                AZ(bo->req);
                assert(cl >= 0);
                (void)ObjIterate(bo->wrk, bo->bereq_body,
                    vdc, VDP_ObjIterate, 0);
        } else if (bo->req != NULL &&
            bo->req->req_body_status != BS_NONE) {
                if (cl < 0)
                        V1L_Chunked(v1l);
                i = VRB_Iterate(wrk, bo->vsl, bo->req, VDP_ObjIterate, vdc);

                if (bo->req->req_body_status != BS_CACHED)
                        bo->no_retry = "req.body not cached";

                if (bo->req->req_body_status == BS_ERROR) {
                        /*
                         * XXX: (#2332) We should test to see if the backend
                         * XXX: sent us some headers explaining why.
                         * XXX: This is hard because of the mistaken API split
                         * XXX: between cache_backend.c and V1F, and therefore
                         * XXX: Parked in this comment, pending renovation of
                         * XXX: the VDI/backend-protocol API to allow non-H1
                         * XXX: backends.
                         */
                        assert(i < 0);
                        VSLb(bo->vsl, SLT_FetchError,
                            "req.body read error: %d (%s)",
                            errno, VAS_errtxt(errno));
                        bo->req->doclose = SC_RX_BODY;
                        bo->err_code = 400;
                }
                if (cl < 0)
                        V1L_EndChunk(v1l);
        }

        sc = V1L_Close(&v1l, &bytes);
        CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);

        /* Bytes accounting */
        *ctr_hdrbytes += hdrbytes;
        *ctr_bodybytes += VDP_Close(vdc, NULL, NULL);

        if (sc == SC_NULL && i < 0)
                sc = SC_TX_ERROR;

        CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
        if (sc != SC_NULL) {
                VSLb(bo->vsl, SLT_FetchError,
                    "backend write error: %d (%s) (%s)",
                    errno, VAS_errtxt(errno), sc->desc);
                VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
                htc->doclose = sc;
                return (-1);
        }
        CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
        VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
        return (0);
}

int
V1F_FetchRespHdr(struct busyobj *bo)
{

        struct http *hp;
        int i;
        double t;
        struct http_conn *htc;
        enum htc_status_e hs;
        const char *name, *desc;

        CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
        CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
        CHECK_OBJ_ORNULL(bo->req, REQ_MAGIC);

        htc = bo->htc;
        assert(*htc->rfd > 0);

        VSC_C_main->backend_req++;

        /* Receive response */

        HTC_RxInit(htc, bo->ws);
        CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
        CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);

        t = VTIM_real() + htc->first_byte_timeout;
        hs = HTC_RxStuff(htc, HTTP1_Complete, NULL, NULL,
            t, NAN, htc->between_bytes_timeout, cache_param->http_resp_size);
        if (hs != HTC_S_COMPLETE) {
                bo->acct.beresp_hdrbytes +=
                    htc->rxbuf_e - htc->rxbuf_b;
                switch (hs) {
                case HTC_S_JUNK:
                        VSLb(bo->vsl, SLT_FetchError, "Received junk");
                        htc->doclose = SC_RX_JUNK;
                        break;
                case HTC_S_CLOSE:
                        VSLb(bo->vsl, SLT_FetchError, "backend closed");
                        htc->doclose = SC_RESP_CLOSE;
                        break;
                case HTC_S_TIMEOUT:
                        VSLb(bo->vsl, SLT_FetchError, "timeout");
                        htc->doclose = SC_RX_TIMEOUT;
                        break;
                case HTC_S_OVERFLOW:
                        VSLb(bo->vsl, SLT_FetchError, "overflow");
                        htc->doclose = SC_RX_OVERFLOW;
                        break;
                case HTC_S_IDLE:
                        VSLb(bo->vsl, SLT_FetchError, "first byte timeout");
                        htc->doclose = SC_RX_TIMEOUT;
                        break;
                default:
                        HTC_Status(hs, &name, &desc);
                        VSLb(bo->vsl, SLT_FetchError, "HTC %s (%s)",
                             name, desc);
                        htc->doclose = SC_RX_BAD;
                        break;
                }
                return (htc->rxbuf_e == htc->rxbuf_b ? 1 : -1);
        }
        VTCP_set_read_timeout(*htc->rfd, htc->between_bytes_timeout);

        hp = bo->beresp;

        i = HTTP1_DissectResponse(htc, hp, bo->bereq);
        bo->acct.beresp_hdrbytes += htc->rxbuf_e - htc->rxbuf_b;
        if (i) {
                VSLb(bo->vsl, SLT_FetchError, "http format error");
                htc->doclose = SC_RX_JUNK;
                return (-1);
        }

        htc->doclose = http_DoConnection(hp, SC_RESP_CLOSE);

        /*
         * Figure out how the fetch is supposed to happen, before the
         * headers are adulterated by VCL
         */
        if (http_method_eq(http_GetMethod(bo->bereq), HEAD)) {
                /*
                 * A HEAD request can never have a body in the reply,
                 * no matter what the headers might say.
                 * [RFC7231 4.3.2 p25]
                 */
                bo->wrk->stats->fetch_head++;
                bo->htc->body_status = BS_NONE;
        } else if (http_GetStatus(bo->beresp) <= 199) {
                /*
                 * 1xx responses never have a body.
                 * [RFC7230 3.3.2 p31]
                 * ... but we should never see them.
                 */
                bo->wrk->stats->fetch_1xx++;
                bo->htc->body_status = BS_ERROR;
        } else if (http_IsStatus(bo->beresp, 204)) {
                /*
                 * 204 is "No Content", obviously don't expect a body.
                 * [RFC7230 3.3.1 p29 and 3.3.2 p31]
                 */
                bo->wrk->stats->fetch_204++;
                if ((http_GetHdr(bo->beresp, H_Content_Length, NULL) &&
                    bo->htc->content_length != 0) ||
                    http_GetHdr(bo->beresp, H_Transfer_Encoding, NULL))
                        bo->htc->body_status = BS_ERROR;
                else
                        bo->htc->body_status = BS_NONE;
        } else if (http_IsStatus(bo->beresp, 304)) {
                /*
                 * 304 is "Not Modified" it has no body.
                 * [RFC7230 3.3 p28]
                 */
                bo->wrk->stats->fetch_304++;
                bo->htc->body_status = BS_NONE;
        } else if (bo->htc->body_status == BS_CHUNKED) {
                bo->wrk->stats->fetch_chunked++;
        } else if (bo->htc->body_status == BS_LENGTH) {
                assert(bo->htc->content_length > 0);
                bo->wrk->stats->fetch_length++;
        } else if (bo->htc->body_status == BS_EOF) {
                bo->wrk->stats->fetch_eof++;
        } else if (bo->htc->body_status == BS_ERROR) {
                bo->wrk->stats->fetch_bad++;
        } else if (bo->htc->body_status == BS_NONE) {
                bo->wrk->stats->fetch_none++;
        } else {
                WRONG("wrong bodystatus");
        }

        assert(bo->vfc->resp == bo->beresp);
        if (bo->htc->body_status != BS_NONE &&
            bo->htc->body_status != BS_ERROR)
                if (V1F_Setup_Fetch(bo->vfc, bo->htc)) {
                        VSLb(bo->vsl, SLT_FetchError, "overflow");
                        htc->doclose = SC_RX_OVERFLOW;
                        return (-1);
                }

        return (0);
}

		varnish-cache/bin/varnishd/http1/cache_http1_fetch.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2015 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		#include "config.h"
32
33		#include "cache/cache_varnishd.h"
34		#include "cache/cache_filter.h"
35
36		#include <stdio.h>
37		#include <stdlib.h>
38
39		#include "vtcp.h"
40		#include "vtim.h"
41
42		#include "cache_http1.h"
43
44		static int
45	4310	v1f_stackv1l(struct vdp_ctx vdc, struct busyobj bo, struct v1l *v1l)
46		{
47		struct vrt_ctx ctx[1];
48
49	4310	INIT_OBJ(ctx, VRT_CTX_MAGIC);
50	4310	VCL_Bo2Ctx(ctx, bo);
51	4310	return (VDP_Push(ctx, vdc, ctx->ws, VDP_v1l, v1l));
52		}
53
54		/*--------------------------------------------------------------------
55		* Send request to backend, including any (cached) req.body
56		*
57		* Return value:
58		* 0 success
59		* 1 failure
60		*/
61
62		int
63	4314	V1F_SendReq(struct worker wrk, struct busyobj bo, uint64_t *ctr_hdrbytes,
64		uint64_t *ctr_bodybytes)
65		{
66		struct http *hp;
67		stream_close_t sc;
68		ssize_t i;
69		uint64_t bytes, hdrbytes;
70		struct http_conn *htc;
71	4314	struct vdp_ctx vdc[1] = {{ 0 }};
72		intmax_t cl;
73	4314	const char *err = NULL;
74	4314	struct v1l *v1l = NULL;
75
76	4314	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
77	4314	CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
78	4314	CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
79	4314	CHECK_OBJ_ORNULL(bo->req, REQ_MAGIC);
80	4314	AN(ctr_hdrbytes);
81	4314	AN(ctr_bodybytes);
82
83	4314	htc = bo->htc;
84	4314	assert(*htc->rfd > 0);
85	4314	hp = bo->bereq;
86
87	4314	if (bo->bereq_body != NULL)
88	36	cl = ObjGetLen(wrk, bo->bereq_body);
89	4278	else if (bo->req != NULL && !bo->req->req_body_status->length_known)
90	28	cl = -1;
91	4250	else if (bo->req != NULL) {
92	138	cl = http_GetContentLength(bo->req->http);
93	138	if (cl < 0)
94	40	cl = 0;
95	138	}
96		else
97	4112	cl = 0;
98
99	4314	VDP_Init(vdc, wrk, bo->vsl, NULL, bo, &cl);
100	4314	if (bo->vdp_filter_list != NULL &&
101	14	VCL_StackVDP(vdc, bo->vcl, bo->vdp_filter_list, NULL, bo))
102	2	err = "Failure to push processors";
103	4312	else if ((v1l = V1L_Open(wrk->aws, htc->rfd, bo->vsl, nan(""), 0)) == NULL) {
104		/* ^^^^^^^^
105		* XXX: need a send_timeout for the backend side
106		* XXX: use cache_param->http1_iovs ?
107		*/
108	2	err = "Failure to open V1L (workspace_thread overflow)";
109	2	}
110	4310	else if (v1f_stackv1l(vdc, bo, v1l))
111	32	err = "Failure to push V1L";
112
113	4314	if (err != NULL) {
114	36	if (v1l != NULL)
115	32	(void) V1L_Close(&v1l, &bytes);
116	36	if (VALID_OBJ(vdc, VDP_CTX_MAGIC))
117	36	(void) VDP_Close(vdc, NULL, NULL);
118	36	VSLb(bo->vsl, SLT_FetchError, "%s", err);
119	36	VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
120	36	htc->doclose = SC_OVERLOAD;
121	36	return (-1);
122		}
123
124
125	4278	assert(cl >= -1);
126	4278	if (cl < 0)
127	28	http_PrintfHeader(hp, "Transfer-Encoding: chunked");
128
129	4278	VTCP_blocking(htc->rfd); / XXX: we should timeout instead */
130	4278	hdrbytes = HTTP1_Write(v1l, hp, HTTP1_Req);
131
132		/* Deal with any message-body the request might (still) have */
133	4278	i = 0;
134
135	4278	if (bo->bereq_body != NULL) {
136	36	AZ(bo->req);
137	36	assert(cl >= 0);
138	72	(void)ObjIterate(bo->wrk, bo->bereq_body,
139	36	vdc, VDP_ObjIterate, 0);
140	4278	} else if (bo->req != NULL &&
141	162	bo->req->req_body_status != BS_NONE) {
142	118	if (cl < 0)
143	28	V1L_Chunked(v1l);
144	118	i = VRB_Iterate(wrk, bo->vsl, bo->req, VDP_ObjIterate, vdc);
145
146	118	if (bo->req->req_body_status != BS_CACHED)
147	116	bo->no_retry = "req.body not cached";
148
149	118	if (bo->req->req_body_status == BS_ERROR) {
150		/*
151		* XXX: (#2332) We should test to see if the backend
152		* XXX: sent us some headers explaining why.
153		* XXX: This is hard because of the mistaken API split
154		* XXX: between cache_backend.c and V1F, and therefore
155		* XXX: Parked in this comment, pending renovation of
156		* XXX: the VDI/backend-protocol API to allow non-H1
157		* XXX: backends.
158		*/
159	30	assert(i < 0);
160	60	VSLb(bo->vsl, SLT_FetchError,
161		"req.body read error: %d (%s)",
162	30	errno, VAS_errtxt(errno));
163	30	bo->req->doclose = SC_RX_BODY;
164	30	bo->err_code = 400;
165	30	}
166	118	if (cl < 0)
167	28	V1L_EndChunk(v1l);
168	118	}
169
170	4278	sc = V1L_Close(&v1l, &bytes);
171	4278	CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
172
173		/* Bytes accounting */
174	4278	*ctr_hdrbytes += hdrbytes;
175	4278	*ctr_bodybytes += VDP_Close(vdc, NULL, NULL);
176
177	4278	if (sc == SC_NULL && i < 0)
178	30	sc = SC_TX_ERROR;
179
180	4278	CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
181	4278	if (sc != SC_NULL) {
182	60	VSLb(bo->vsl, SLT_FetchError,
183		"backend write error: %d (%s) (%s)",
184	30	errno, VAS_errtxt(errno), sc->desc);
185	30	VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
186	30	htc->doclose = sc;
187	30	return (-1);
188		}
189	4248	CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
190	4248	VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
191	4248	return (0);
192	4314	}
193
194		int
195	4212	V1F_FetchRespHdr(struct busyobj *bo)
196		{
197
198		struct http *hp;
199		int i;
200		double t;
201		struct http_conn *htc;
202		enum htc_status_e hs;
203		const char name, desc;
204
205	4212	CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
206	4212	CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
207	4212	CHECK_OBJ_ORNULL(bo->req, REQ_MAGIC);
208
209	4212	htc = bo->htc;
210	4212	assert(*htc->rfd > 0);
211
212	4212	VSC_C_main->backend_req++;
213
214		/* Receive response */
215
216	4212	HTC_RxInit(htc, bo->ws);
217	4212	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
218	4212	CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
219
220	4212	t = VTIM_real() + htc->first_byte_timeout;
221	8424	hs = HTC_RxStuff(htc, HTTP1_Complete, NULL, NULL,
222	4212	t, NAN, htc->between_bytes_timeout, cache_param->http_resp_size);
223	4212	if (hs != HTC_S_COMPLETE) {
224	84	bo->acct.beresp_hdrbytes +=
225	84	htc->rxbuf_e - htc->rxbuf_b;
226	84	switch (hs) {
227		case HTC_S_JUNK:
228	0	VSLb(bo->vsl, SLT_FetchError, "Received junk");
229	0	htc->doclose = SC_RX_JUNK;
230	0	break;
231		case HTC_S_CLOSE:
232	0	VSLb(bo->vsl, SLT_FetchError, "backend closed");
233	0	htc->doclose = SC_RESP_CLOSE;
234	0	break;
235		case HTC_S_TIMEOUT:
236	2	VSLb(bo->vsl, SLT_FetchError, "timeout");
237	2	htc->doclose = SC_RX_TIMEOUT;
238	2	break;
239		case HTC_S_OVERFLOW:
240	40	VSLb(bo->vsl, SLT_FetchError, "overflow");
241	40	htc->doclose = SC_RX_OVERFLOW;
242	40	break;
243		case HTC_S_IDLE:
244	10	VSLb(bo->vsl, SLT_FetchError, "first byte timeout");
245	10	htc->doclose = SC_RX_TIMEOUT;
246	10	break;
247		default:
248	32	HTC_Status(hs, &name, &desc);
249	64	VSLb(bo->vsl, SLT_FetchError, "HTC %s (%s)",
250	32	name, desc);
251	32	htc->doclose = SC_RX_BAD;
252	32	break;
253		}
254	84	return (htc->rxbuf_e == htc->rxbuf_b ? 1 : -1);
255		}
256	4128	VTCP_set_read_timeout(*htc->rfd, htc->between_bytes_timeout);
257
258	4128	hp = bo->beresp;
259
260	4128	i = HTTP1_DissectResponse(htc, hp, bo->bereq);
261	4128	bo->acct.beresp_hdrbytes += htc->rxbuf_e - htc->rxbuf_b;
262	4128	if (i) {
263	36	VSLb(bo->vsl, SLT_FetchError, "http format error");
264	36	htc->doclose = SC_RX_JUNK;
265	36	return (-1);
266		}
267
268	4092	htc->doclose = http_DoConnection(hp, SC_RESP_CLOSE);
269
270		/*
271		* Figure out how the fetch is supposed to happen, before the
272		* headers are adulterated by VCL
273		*/
274	4092	if (http_method_eq(http_GetMethod(bo->bereq), HEAD)) {
275		/*
276		* A HEAD request can never have a body in the reply,
277		* no matter what the headers might say.
278		* [RFC7231 4.3.2 p25]
279		*/
280	12	bo->wrk->stats->fetch_head++;
281	12	bo->htc->body_status = BS_NONE;
282	4092	} else if (http_GetStatus(bo->beresp) <= 199) {
283		/*
284		* 1xx responses never have a body.
285		* [RFC7230 3.3.2 p31]
286		* ... but we should never see them.
287		*/
288	0	bo->wrk->stats->fetch_1xx++;
289	0	bo->htc->body_status = BS_ERROR;
290	4080	} else if (http_IsStatus(bo->beresp, 204)) {
291		/*
292		* 204 is "No Content", obviously don't expect a body.
293		* [RFC7230 3.3.1 p29 and 3.3.2 p31]
294		*/
295	24	bo->wrk->stats->fetch_204++;
296	24	if ((http_GetHdr(bo->beresp, H_Content_Length, NULL) &&
297	10	bo->htc->content_length != 0) \|\|
298	14	http_GetHdr(bo->beresp, H_Transfer_Encoding, NULL))
299	16	bo->htc->body_status = BS_ERROR;
300		else
301	8	bo->htc->body_status = BS_NONE;
302	4068	} else if (http_IsStatus(bo->beresp, 304)) {
303		/*
304		* 304 is "Not Modified" it has no body.
305		* [RFC7230 3.3 p28]
306		*/
307	84	bo->wrk->stats->fetch_304++;
308	84	bo->htc->body_status = BS_NONE;
309	4056	} else if (bo->htc->body_status == BS_CHUNKED) {
310	284	bo->wrk->stats->fetch_chunked++;
311	3972	} else if (bo->htc->body_status == BS_LENGTH) {
312	2094	assert(bo->htc->content_length > 0);
313	2094	bo->wrk->stats->fetch_length++;
314	3688	} else if (bo->htc->body_status == BS_EOF) {
315	46	bo->wrk->stats->fetch_eof++;
316	1594	} else if (bo->htc->body_status == BS_ERROR) {
317	8	bo->wrk->stats->fetch_bad++;
318	1548	} else if (bo->htc->body_status == BS_NONE) {
319	1540	bo->wrk->stats->fetch_none++;
320	1540	} else {
321	0	WRONG("wrong bodystatus");
322		}
323
324	4080	assert(bo->vfc->resp == bo->beresp);
325	4080	if (bo->htc->body_status != BS_NONE &&
326	2436	bo->htc->body_status != BS_ERROR)
327	2424	if (V1F_Setup_Fetch(bo->vfc, bo->htc)) {
328	32	VSLb(bo->vsl, SLT_FetchError, "overflow");
329	32	htc->doclose = SC_RX_OVERFLOW;
330	32	return (-1);
331		}
332
333	4048	return (0);
334	4200	}