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 vrt_ctx ctx[1];

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

/*--------------------------------------------------------------------
 * 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;

        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_Open(wrk, wrk->aws, htc->rfd, bo->vsl, nan(""), 0),
            wrk->v1l == 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))
                err = "Failure to push V1L";

        if (err != NULL) {
                if (wrk->v1l != NULL)
                        (void) V1L_Close(wrk, &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(wrk, 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(wrk);
                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;
                }
                if (cl < 0)
                        V1L_EndChunk(wrk);
        }

        sc = V1L_Close(wrk, &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	83480	v1f_stackv1l(struct vdp_ctx vdc, struct busyobj bo)
46		{
47		struct vrt_ctx ctx[1];
48
49	83480	INIT_OBJ(ctx, VRT_CTX_MAGIC);
50	83480	VCL_Bo2Ctx(ctx, bo);
51	83480	return (VDP_Push(ctx, vdc, ctx->ws, VDP_v1l, NULL));
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	83560	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	83560	struct vdp_ctx vdc[1] = {{ 0 }};
72		intmax_t cl;
73	83560	const char *err = NULL;
74
75	83560	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
76	83560	CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
77	83560	CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
78	83560	CHECK_OBJ_ORNULL(bo->req, REQ_MAGIC);
79	83560	AN(ctr_hdrbytes);
80	83560	AN(ctr_bodybytes);
81
82	83560	htc = bo->htc;
83	83560	assert(*htc->rfd > 0);
84	83560	hp = bo->bereq;
85
86	83560	if (bo->bereq_body != NULL)
87	720	cl = ObjGetLen(wrk, bo->bereq_body);
88	82840	else if (bo->req != NULL && !bo->req->req_body_status->length_known)
89	400	cl = -1;
90	82440	else if (bo->req != NULL) {
91	2800	cl = http_GetContentLength(bo->req->http);
92	2800	if (cl < 0)
93	840	cl = 0;
94	2800	}
95		else
96	79640	cl = 0;
97
98	83560	VDP_Init(vdc, wrk, bo->vsl, NULL, bo, &cl);
99	83560	if (bo->vdp_filter_list != NULL &&
100	280	VCL_StackVDP(vdc, bo->vcl, bo->vdp_filter_list, NULL, bo))
101	40	err = "Failure to push processors";
102	167040	else if (V1L_Open(wrk, wrk->aws, htc->rfd, bo->vsl, nan(""), 0),
103	83520	wrk->v1l == NULL) {
104		/* ^^^^^^
105		* XXX: need a send_timeout for the backend side
106		* XXX: use cache_param->http1_iovs ?
107		*/
108	40	err = "Failure to open V1L (workspace_thread overflow)";
109	40	}
110	83480	else if (v1f_stackv1l(vdc, bo))
111	640	err = "Failure to push V1L";
112
113	83560	if (err != NULL) {
114	721	if (wrk->v1l != NULL)
115	640	(void) V1L_Close(wrk, &bytes);
116	721	if (VALID_OBJ(vdc, VDP_CTX_MAGIC))
117	720	(void) VDP_Close(vdc, NULL, NULL);
118	721	VSLb(bo->vsl, SLT_FetchError, "%s", err);
119	721	VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
120	721	htc->doclose = SC_OVERLOAD;
121	721	return (-1);
122		}
123
124	82839	assert(cl >= -1);
125	82839	if (cl < 0)
126	400	http_PrintfHeader(hp, "Transfer-Encoding: chunked");
127
128	82839	VTCP_blocking(htc->rfd); / XXX: we should timeout instead */
129	82839	hdrbytes = HTTP1_Write(wrk, hp, HTTP1_Req);
130
131		/* Deal with any message-body the request might (still) have */
132	82839	i = 0;
133
134	82839	if (bo->bereq_body != NULL) {
135	720	AZ(bo->req);
136	720	assert(cl >= 0);
137	1440	(void)ObjIterate(bo->wrk, bo->bereq_body,
138	720	vdc, VDP_ObjIterate, 0);
139	82839	} else if (bo->req != NULL &&
140	3120	bo->req->req_body_status != BS_NONE) {
141	2200	if (cl < 0)
142	400	V1L_Chunked(wrk);
143	2200	i = VRB_Iterate(wrk, bo->vsl, bo->req, VDP_ObjIterate, vdc);
144
145	2200	if (bo->req->req_body_status != BS_CACHED)
146	2160	bo->no_retry = "req.body not cached";
147
148	2200	if (bo->req->req_body_status == BS_ERROR) {
149		/*
150		* XXX: (#2332) We should test to see if the backend
151		* XXX: sent us some headers explaining why.
152		* XXX: This is hard because of the mistaken API split
153		* XXX: between cache_backend.c and V1F, and therefore
154		* XXX: Parked in this comment, pending renovation of
155		* XXX: the VDI/backend-protocol API to allow non-H1
156		* XXX: backends.
157		*/
158	440	assert(i < 0);
159	880	VSLb(bo->vsl, SLT_FetchError,
160		"req.body read error: %d (%s)",
161	440	errno, VAS_errtxt(errno));
162	440	bo->req->doclose = SC_RX_BODY;
163	440	}
164	2200	if (cl < 0)
165	400	V1L_EndChunk(wrk);
166	2200	}
167
168	82839	sc = V1L_Close(wrk, &bytes);
169	82839	CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
170
171		/* Bytes accounting */
172	82839	*ctr_hdrbytes += hdrbytes;
173	82839	*ctr_bodybytes += VDP_Close(vdc, NULL, NULL);
174
175	82839	if (sc == SC_NULL && i < 0)
176	440	sc = SC_TX_ERROR;
177
178	82839	CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
179	82839	if (sc != SC_NULL) {
180	880	VSLb(bo->vsl, SLT_FetchError,
181		"backend write error: %d (%s) (%s)",
182	440	errno, VAS_errtxt(errno), sc->desc);
183	440	VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
184	440	htc->doclose = sc;
185	440	return (-1);
186		}
187	82399	CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
188	82399	VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
189	82399	return (0);
190	83560	}
191
192		int
193	81555	V1F_FetchRespHdr(struct busyobj *bo)
194		{
195
196		struct http *hp;
197		int i;
198		double t;
199		struct http_conn *htc;
200		enum htc_status_e hs;
201		const char name, desc;
202
203	81555	CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
204	81555	CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
205	81555	CHECK_OBJ_ORNULL(bo->req, REQ_MAGIC);
206
207	81555	htc = bo->htc;
208	81555	assert(*htc->rfd > 0);
209
210	81555	VSC_C_main->backend_req++;
211
212		/* Receive response */
213
214	81555	HTC_RxInit(htc, bo->ws);
215	81555	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
216	81555	CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
217
218	81555	t = VTIM_real() + htc->first_byte_timeout;
219	163110	hs = HTC_RxStuff(htc, HTTP1_Complete, NULL, NULL,
220	81555	t, NAN, htc->between_bytes_timeout, cache_param->http_resp_size);
221	81555	if (hs != HTC_S_COMPLETE) {
222	1600	bo->acct.beresp_hdrbytes +=
223	1600	htc->rxbuf_e - htc->rxbuf_b;
224	1600	switch (hs) {
225		case HTC_S_JUNK:
226	0	VSLb(bo->vsl, SLT_FetchError, "Received junk");
227	0	htc->doclose = SC_RX_JUNK;
228	0	break;
229		case HTC_S_CLOSE:
230	0	VSLb(bo->vsl, SLT_FetchError, "backend closed");
231	0	htc->doclose = SC_RESP_CLOSE;
232	0	break;
233		case HTC_S_TIMEOUT:
234	40	VSLb(bo->vsl, SLT_FetchError, "timeout");
235	40	htc->doclose = SC_RX_TIMEOUT;
236	40	break;
237		case HTC_S_OVERFLOW:
238	800	VSLb(bo->vsl, SLT_FetchError, "overflow");
239	800	htc->doclose = SC_RX_OVERFLOW;
240	800	break;
241		case HTC_S_IDLE:
242	200	VSLb(bo->vsl, SLT_FetchError, "first byte timeout");
243	200	htc->doclose = SC_RX_TIMEOUT;
244	200	break;
245		default:
246	560	HTC_Status(hs, &name, &desc);
247	1120	VSLb(bo->vsl, SLT_FetchError, "HTC %s (%s)",
248	560	name, desc);
249	560	htc->doclose = SC_RX_BAD;
250	560	break;
251		}
252	1600	return (htc->rxbuf_e == htc->rxbuf_b ? 1 : -1);
253		}
254	79955	VTCP_set_read_timeout(*htc->rfd, htc->between_bytes_timeout);
255
256	79955	hp = bo->beresp;
257
258	79955	i = HTTP1_DissectResponse(htc, hp, bo->bereq);
259	79955	bo->acct.beresp_hdrbytes += htc->rxbuf_e - htc->rxbuf_b;
260	79955	if (i) {
261	720	VSLb(bo->vsl, SLT_FetchError, "http format error");
262	720	htc->doclose = SC_RX_JUNK;
263	720	return (-1);
264		}
265
266	79235	htc->doclose = http_DoConnection(hp, SC_RESP_CLOSE);
267
268		/*
269		* Figure out how the fetch is supposed to happen, before the
270		* headers are adulterated by VCL
271		*/
272	79235	if (http_method_eq(http_GetMethod(bo->bereq), HEAD)) {
273		/*
274		* A HEAD request can never have a body in the reply,
275		* no matter what the headers might say.
276		* [RFC7231 4.3.2 p25]
277		*/
278	80	bo->wrk->stats->fetch_head++;
279	80	bo->htc->body_status = BS_NONE;
280	79235	} else if (http_GetStatus(bo->beresp) <= 199) {
281		/*
282		* 1xx responses never have a body.
283		* [RFC7230 3.3.2 p31]
284		* ... but we should never see them.
285		*/
286	0	bo->wrk->stats->fetch_1xx++;
287	0	bo->htc->body_status = BS_ERROR;
288	79155	} else if (http_IsStatus(bo->beresp, 204)) {
289		/*
290		* 204 is "No Content", obviously don't expect a body.
291		* [RFC7230 3.3.1 p29 and 3.3.2 p31]
292		*/
293	360	bo->wrk->stats->fetch_204++;
294	360	if ((http_GetHdr(bo->beresp, H_Content_Length, NULL) &&
295	160	bo->htc->content_length != 0) \|\|
296	200	http_GetHdr(bo->beresp, H_Transfer_Encoding, NULL))
297	240	bo->htc->body_status = BS_ERROR;
298		else
299	120	bo->htc->body_status = BS_NONE;
300	78995	} else if (http_IsStatus(bo->beresp, 304)) {
301		/*
302		* 304 is "Not Modified" it has no body.
303		* [RFC7230 3.3 p28]
304		*/
305	1320	bo->wrk->stats->fetch_304++;
306	1320	bo->htc->body_status = BS_NONE;
307	78795	} else if (bo->htc->body_status == BS_CHUNKED) {
308	5600	bo->wrk->stats->fetch_chunked++;
309	77475	} else if (bo->htc->body_status == BS_LENGTH) {
310	41075	assert(bo->htc->content_length > 0);
311	41075	bo->wrk->stats->fetch_length++;
312	71875	} else if (bo->htc->body_status == BS_EOF) {
313	920	bo->wrk->stats->fetch_eof++;
314	30800	} else if (bo->htc->body_status == BS_ERROR) {
315	160	bo->wrk->stats->fetch_bad++;
316	29880	} else if (bo->htc->body_status == BS_NONE) {
317	29720	bo->wrk->stats->fetch_none++;
318	29720	} else {
319	0	WRONG("wrong bodystatus");
320		}
321
322	79075	assert(bo->vfc->resp == bo->beresp);
323	79075	if (bo->htc->body_status != BS_NONE &&
324	47832	bo->htc->body_status != BS_ERROR)
325	47595	if (V1F_Setup_Fetch(bo->vfc, bo->htc)) {
326	640	VSLb(bo->vsl, SLT_FetchError, "overflow");
327	640	htc->doclose = SC_RX_OVERFLOW;
328	640	return (-1);
329		}
330
331	78435	return (0);
332	81395	}