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_int.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, ocl;
        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;
        ocl = cl;
        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);
                VSLbs(bo->vsl, SLT_FetchError, TOSTRAND(err));
                VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
                htc->doclose = SC_OVERLOAD;
                return (-1);
        }


        assert(cl >= -1);
        if (cl < 0) {
                http_Unset(hp, H_Content_Length);
                http_ForceHeader(hp, H_Transfer_Encoding, "chunked");
        } else if (ocl != cl) {
                assert(cl >= 0);
                http_Unset(hp, H_Transfer_Encoding);
                http_Unset(hp, H_Content_Length);
                http_PrintfHeader(hp, "Content-Length: %ju", cl);
        }

        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 (cl != 0 && bo->bereq_body != NULL) {
                AZ(bo->req);
                if (cl < 0)
                        V1L_Chunked(v1l);
                (void)ObjIterate(bo->wrk, bo->bereq_body,
                    vdc, VDP_ObjIterate, 0);
                if (cl < 0)
                        V1L_EndChunk(v1l);
        } else if (cl != 0 && 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_EOF:
                        VSLb(bo->vsl, SLT_FetchError, "backend closed");
                        htc->doclose = SC_REM_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;
        htc->rxbuf_b = NULL;
        htc->rxbuf_e = NULL;
        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(bo->bereq->wkm, WKM_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);
}

		vinyl-cache/bin/vinyld/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_int.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	8959	v1f_stackv1l(struct vdp_ctx vdc, struct busyobj bo, struct v1l *v1l)
46		{
47		struct vrt_ctx ctx[1];
48
49	8959	INIT_OBJ(ctx, VRT_CTX_MAGIC);
50	8959	VCL_Bo2Ctx(ctx, bo);
51	8959	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	8967	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	8967	struct vdp_ctx vdc[1] = {{ 0 }};
72		intmax_t cl, ocl;
73	8967	const char *err = NULL;
74	8967	struct v1l *v1l = NULL;
75
76	8967	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
77	8967	CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
78	8967	CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
79	8967	CHECK_OBJ_ORNULL(bo->req, REQ_MAGIC);
80	8967	AN(ctr_hdrbytes);
81	8967	AN(ctr_bodybytes);
82
83	8967	htc = bo->htc;
84	8967	assert(*htc->rfd > 0);
85	8967	hp = bo->bereq;
86
87	8967	if (bo->bereq_body != NULL)
88	95	cl = ObjGetLen(wrk, bo->bereq_body);
89	8872	else if (bo->req != NULL && !bo->req->req_body_status->length_known)
90	76	cl = -1;
91	8796	else if (bo->req != NULL) {
92	288	cl = http_GetContentLength(bo->req->http);
93	288	if (cl < 0)
94	80	cl = 0;
95	288	}
96		else
97	8508	cl = 0;
98	8967	ocl = cl;
99	8967	VDP_Init(vdc, wrk, bo->vsl, NULL, bo, &cl);
100	8967	if (bo->vdp_filter_list != NULL &&
101	72	VCL_StackVDP(vdc, bo->vcl, bo->vdp_filter_list, NULL, bo))
102	4	err = "Failure to push processors";
103	8963	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	4	err = "Failure to open V1L (workspace_thread overflow)";
109	4	}
110	8959	else if (v1f_stackv1l(vdc, bo, v1l))
111	64	err = "Failure to push V1L";
112
113	8967	if (err != NULL) {
114	71	if (v1l != NULL)
115	64	(void) V1L_Close(&v1l, &bytes);
116	71	if (VALID_OBJ(vdc, VDP_CTX_MAGIC))
117	72	(void) VDP_Close(vdc, NULL, NULL);
118	73	VSLbs(bo->vsl, SLT_FetchError, TOSTRAND(err));
119	73	VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
120	73	htc->doclose = SC_OVERLOAD;
121	73	return (-1);
122		}
123
124
125	8896	assert(cl >= -1);
126	8896	if (cl < 0) {
127	84	http_Unset(hp, H_Content_Length);
128	84	http_ForceHeader(hp, H_Transfer_Encoding, "chunked");
129	8896	} else if (ocl != cl) {
130	16	assert(cl >= 0);
131	16	http_Unset(hp, H_Transfer_Encoding);
132	16	http_Unset(hp, H_Content_Length);
133	16	http_PrintfHeader(hp, "Content-Length: %ju", cl);
134	16	}
135
136	8896	VTCP_blocking(htc->rfd); / XXX: we should timeout instead */
137	8896	hdrbytes = HTTP1_Write(v1l, hp, HTTP1_Req);
138
139		/* Deal with any message-body the request might (still) have */
140	8896	i = 0;
141
142	8896	if (cl != 0 && bo->bereq_body != NULL) {
143	92	AZ(bo->req);
144	92	if (cl < 0)
145	12	V1L_Chunked(v1l);
146	184	(void)ObjIterate(bo->wrk, bo->bereq_body,
147	92	vdc, VDP_ObjIterate, 0);
148	92	if (cl < 0)
149	12	V1L_EndChunk(v1l);
150	8896	} else if (cl != 0 && bo->req != NULL &&
151	272	bo->req->req_body_status != BS_NONE) {
152	264	if (cl < 0)
153	72	V1L_Chunked(v1l);
154	264	i = VRB_Iterate(wrk, bo->vsl, bo->req, VDP_ObjIterate, vdc);
155
156	264	if (bo->req->req_body_status != BS_CACHED)
157	260	bo->no_retry = "req.body not cached";
158
159	264	if (bo->req->req_body_status == BS_ERROR) {
160		/*
161		* XXX: (#2332) We should test to see if the backend
162		* XXX: sent us some headers explaining why.
163		* XXX: This is hard because of the mistaken API split
164		* XXX: between cache_backend.c and V1F, and therefore
165		* XXX: Parked in this comment, pending renovation of
166		* XXX: the VDI/backend-protocol API to allow non-H1
167		* XXX: backends.
168		*/
169	60	assert(i < 0);
170	120	VSLb(bo->vsl, SLT_FetchError,
171		"req.body read error: %d (%s)",
172	60	errno, VAS_errtxt(errno));
173	60	bo->req->doclose = SC_RX_BODY;
174	60	bo->err_code = 400;
175	60	}
176	264	if (cl < 0)
177	72	V1L_EndChunk(v1l);
178	264	}
179
180	8896	sc = V1L_Close(&v1l, &bytes);
181	8896	CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
182
183		/* Bytes accounting */
184	8896	*ctr_hdrbytes += hdrbytes;
185	8896	*ctr_bodybytes += VDP_Close(vdc, NULL, NULL);
186
187	8896	if (sc == SC_NULL && i < 0)
188	60	sc = SC_TX_ERROR;
189
190	8896	CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
191	8896	if (sc != SC_NULL) {
192	122	VSLb(bo->vsl, SLT_FetchError,
193		"backend write error: %d (%s) (%s)",
194	61	errno, VAS_errtxt(errno), sc->desc);
195	61	VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
196	61	htc->doclose = sc;
197	61	return (-1);
198		}
199	8835	CHECK_OBJ_NOTNULL(sc, STREAM_CLOSE_MAGIC);
200	8835	VSLb_ts_busyobj(bo, "Bereq", W_TIM_real(wrk));
201	8835	return (0);
202	8969	}
203
204		int
205	8764	V1F_FetchRespHdr(struct busyobj *bo)
206		{
207
208		struct http *hp;
209		int i;
210		double t;
211		struct http_conn *htc;
212		enum htc_status_e hs;
213		const char name, desc;
214
215	8764	CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
216	8764	CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
217	8764	CHECK_OBJ_ORNULL(bo->req, REQ_MAGIC);
218
219	8764	htc = bo->htc;
220	8764	assert(*htc->rfd > 0);
221
222	8764	VSC_C_main->backend_req++;
223
224		/* Receive response */
225
226	8764	HTC_RxInit(htc, bo->ws);
227	8764	CHECK_OBJ_NOTNULL(htc, HTTP_CONN_MAGIC);
228	8764	CHECK_OBJ_NOTNULL(bo->htc, HTTP_CONN_MAGIC);
229
230	8764	t = VTIM_real() + htc->first_byte_timeout;
231	17528	hs = HTC_RxStuff(htc, HTTP1_Complete, NULL, NULL,
232	8764	t, NAN, htc->between_bytes_timeout, cache_param->http_resp_size);
233	8764	if (hs != HTC_S_COMPLETE) {
234	188	bo->acct.beresp_hdrbytes +=
235	188	htc->rxbuf_e - htc->rxbuf_b;
236	188	switch (hs) {
237		case HTC_S_JUNK:
238	0	VSLb(bo->vsl, SLT_FetchError, "Received junk");
239	0	htc->doclose = SC_RX_JUNK;
240	0	break;
241		case HTC_S_EOF:
242	84	VSLb(bo->vsl, SLT_FetchError, "backend closed");
243	84	htc->doclose = SC_REM_CLOSE;
244	84	break;
245		case HTC_S_TIMEOUT:
246	4	VSLb(bo->vsl, SLT_FetchError, "timeout");
247	4	htc->doclose = SC_RX_TIMEOUT;
248	4	break;
249		case HTC_S_OVERFLOW:
250	80	VSLb(bo->vsl, SLT_FetchError, "overflow");
251	80	htc->doclose = SC_RX_OVERFLOW;
252	80	break;
253		case HTC_S_IDLE:
254	20	VSLb(bo->vsl, SLT_FetchError, "first byte timeout");
255	20	htc->doclose = SC_RX_TIMEOUT;
256	20	break;
257		default:
258	0	HTC_Status(hs, &name, &desc);
259	0	VSLb(bo->vsl, SLT_FetchError, "HTC %s (%s)",
260	0	name, desc);
261	0	htc->doclose = SC_RX_BAD;
262	0	break;
263		}
264	188	return (htc->rxbuf_e == htc->rxbuf_b ? 1 : -1);
265		}
266	8576	VTCP_set_read_timeout(*htc->rfd, htc->between_bytes_timeout);
267
268	8576	hp = bo->beresp;
269
270	8576	i = HTTP1_DissectResponse(htc, hp, bo->bereq);
271	8576	bo->acct.beresp_hdrbytes += htc->rxbuf_e - htc->rxbuf_b;
272	8576	htc->rxbuf_b = NULL;
273	8576	htc->rxbuf_e = NULL;
274	8576	if (i) {
275	72	VSLb(bo->vsl, SLT_FetchError, "http format error");
276	72	htc->doclose = SC_RX_JUNK;
277	72	return (-1);
278		}
279
280	8504	htc->doclose = http_DoConnection(hp, SC_RESP_CLOSE);
281
282		/*
283		* Figure out how the fetch is supposed to happen, before the
284		* headers are adulterated by VCL
285		*/
286	8504	if (http_method_eq(bo->bereq->wkm, WKM_HEAD)) {
287		/*
288		* A HEAD request can never have a body in the reply,
289		* no matter what the headers might say.
290		* [RFC7231 4.3.2 p25]
291		*/
292	24	bo->wrk->stats->fetch_head++;
293	24	bo->htc->body_status = BS_NONE;
294	8504	} else if (http_GetStatus(bo->beresp) <= 199) {
295		/*
296		* 1xx responses never have a body.
297		* [RFC7230 3.3.2 p31]
298		* ... but we should never see them.
299		*/
300	0	bo->wrk->stats->fetch_1xx++;
301	0	bo->htc->body_status = BS_ERROR;
302	8480	} else if (http_IsStatus(bo->beresp, 204)) {
303		/*
304		* 204 is "No Content", obviously don't expect a body.
305		* [RFC7230 3.3.1 p29 and 3.3.2 p31]
306		*/
307	48	bo->wrk->stats->fetch_204++;
308	48	if ((http_GetHdr(bo->beresp, H_Content_Length, NULL) &&
309	20	bo->htc->content_length != 0) \|\|
310	28	http_GetHdr(bo->beresp, H_Transfer_Encoding, NULL))
311	32	bo->htc->body_status = BS_ERROR;
312		else
313	16	bo->htc->body_status = BS_NONE;
314	8456	} else if (http_IsStatus(bo->beresp, 304)) {
315		/*
316		* 304 is "Not Modified" it has no body.
317		* [RFC7230 3.3 p28]
318		*/
319	180	bo->wrk->stats->fetch_304++;
320	180	bo->htc->body_status = BS_NONE;
321	8432	} else if (bo->htc->body_status == BS_CHUNKED) {
322	592	bo->wrk->stats->fetch_chunked++;
323	8252	} else if (bo->htc->body_status == BS_LENGTH) {
324	4376	assert(bo->htc->content_length > 0);
325	4376	bo->wrk->stats->fetch_length++;
326	7660	} else if (bo->htc->body_status == BS_EOF) {
327	92	bo->wrk->stats->fetch_eof++;
328	3284	} else if (bo->htc->body_status == BS_ERROR) {
329	16	bo->wrk->stats->fetch_bad++;
330	3192	} else if (bo->htc->body_status == BS_NONE) {
331	3176	bo->wrk->stats->fetch_none++;
332	3176	} else {
333	0	WRONG("wrong bodystatus");
334		}
335
336	8480	assert(bo->vfc->resp == bo->beresp);
337	8480	if (bo->htc->body_status != BS_NONE &&
338	5084	bo->htc->body_status != BS_ERROR)
339	5060	if (V1F_Setup_Fetch(bo->vfc, bo->htc)) {
340	64	VSLb(bo->vsl, SLT_FetchError, "overflow");
341	64	htc->doclose = SC_RX_OVERFLOW;
342	64	return (-1);
343		}
344
345	8416	return (0);
346	8740	}