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litespeed-quic/test/http_client.c
Dmitri Tikhonov c44946ecd7 Latest changes 
- [API Change] Add optional callback to call when handshake is done
- [API Change, BUGFIX] After send failure, wait until transport available
2018-05-21 15:02:33 -04:00

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/* Copyright (c) 2017 - 2018 LiteSpeed Technologies Inc. See LICENSE. */
/*
* http_client.c -- A simple HTTP/QUIC client
*/
#ifndef WIN32
#include <arpa/inet.h>
#include <netinet/in.h>
#else
#include <Windows.h>
#include <WinSock2.h>
#include <io.h>
#include <stdlib.h>
#include <getopt.h>
#define STDOUT_FILENO 1
#define random rand
#pragma warning(disable:4996) //POSIX name deprecated
#endif
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/queue.h>
#ifndef WIN32
#include <unistd.h>
#include <sys/types.h>
#endif
#include <sys/stat.h>
#include <fcntl.h>
#include "lsquic.h"
#include "test_common.h"
#include "prog.h"
#include "../src/liblsquic/lsquic_logger.h"
/* This is used to exercise generating and sending of priority frames */
static int randomly_reprioritize_streams;
/* If this file descriptor is open, the client will accept server push and
* dump the contents here. See -u flag.
*/
static int promise_fd = -1;
struct lsquic_conn_ctx;
struct path_elem {
TAILQ_ENTRY(path_elem) next_pe;
const char *path;
};
struct http_client_ctx {
TAILQ_HEAD(, lsquic_conn_ctx)
conn_ctxs;
const char *hostname;
const char *method;
const char *payload;
char payload_size[20];
/* hcc_path_elems holds a list of paths which are to be requested from
* the server. Each new request gets the next path from the list (the
* iterator is stored in hcc_cur_pe); when the end is reached, the
* iterator wraps around.
*/
TAILQ_HEAD(, path_elem) hcc_path_elems;
struct path_elem *hcc_cur_pe;
unsigned hcc_total_n_reqs;
unsigned hcc_reqs_per_conn;
unsigned hcc_concurrency;
unsigned hcc_n_open_conns;
enum {
HCC_DISCARD_RESPONSE = (1 << 0),
HCC_SEEN_FIN = (1 << 1),
HCC_ABORT_ON_INCOMPLETE = (1 << 2),
} hcc_flags;
struct prog *prog;
};
struct lsquic_conn_ctx {
TAILQ_ENTRY(lsquic_conn_ctx) next_ch;
lsquic_conn_t *conn;
struct http_client_ctx *client_ctx;
unsigned ch_n_reqs; /* This number gets decremented as streams are closed and
* incremented as push promises are accepted.
*/
};
static void
create_connections (struct http_client_ctx *client_ctx)
{
while (client_ctx->hcc_n_open_conns < client_ctx->hcc_concurrency &&
client_ctx->hcc_total_n_reqs > 0)
if (0 != prog_connect(client_ctx->prog))
{
LSQ_ERROR("connection failed");
exit(EXIT_FAILURE);
}
}
static lsquic_conn_ctx_t *
http_client_on_new_conn (void *stream_if_ctx, lsquic_conn_t *conn)
{
struct http_client_ctx *client_ctx = stream_if_ctx;
lsquic_conn_ctx_t *conn_h = calloc(1, sizeof(*conn_h));
conn_h->conn = conn;
conn_h->client_ctx = client_ctx;
conn_h->ch_n_reqs = client_ctx->hcc_total_n_reqs <
client_ctx->hcc_reqs_per_conn ?
client_ctx->hcc_total_n_reqs : client_ctx->hcc_reqs_per_conn;
client_ctx->hcc_total_n_reqs -= conn_h->ch_n_reqs;
TAILQ_INSERT_TAIL(&client_ctx->conn_ctxs, conn_h, next_ch);
++conn_h->client_ctx->hcc_n_open_conns;
lsquic_conn_make_stream(conn);
return conn_h;
}
static void
http_client_on_conn_closed (lsquic_conn_t *conn)
{
lsquic_conn_ctx_t *conn_h = lsquic_conn_get_ctx(conn);
enum LSQUIC_CONN_STATUS status;
char errmsg[80];
status = lsquic_conn_status(conn, errmsg, sizeof(errmsg));
LSQ_INFO("Connection closed. Status: %d. Message: %s", status,
errmsg[0] ? errmsg : "<not set>");
if (conn_h->client_ctx->hcc_flags & HCC_ABORT_ON_INCOMPLETE)
{
if (!(conn_h->client_ctx->hcc_flags & HCC_SEEN_FIN))
abort();
}
TAILQ_REMOVE(&conn_h->client_ctx->conn_ctxs, conn_h, next_ch);
--conn_h->client_ctx->hcc_n_open_conns;
create_connections(conn_h->client_ctx);
if (0 == conn_h->client_ctx->hcc_n_open_conns)
{
LSQ_INFO("All connections are closed: stop engine");
prog_stop(conn_h->client_ctx->prog);
}
free(conn_h);
}
static void
http_client_on_hsk_done (lsquic_conn_t *conn, int ok)
{
LSQ_INFO("handshake %s", ok ? "completed successfully" : "failed");
}
struct lsquic_stream_ctx {
lsquic_stream_t *stream;
struct http_client_ctx *client_ctx;
const char *path;
enum {
HEADERS_SENT = (1 << 0),
} sh_flags;
unsigned count;
struct lsquic_reader reader;
};
static lsquic_stream_ctx_t *
http_client_on_new_stream (void *stream_if_ctx, lsquic_stream_t *stream)
{
const int pushed = lsquic_stream_is_pushed(stream);
if (pushed)
{
LSQ_INFO("not accepting server push");
lsquic_stream_refuse_push(stream);
return NULL;
}
lsquic_stream_ctx_t *st_h = calloc(1, sizeof(*st_h));
st_h->stream = stream;
st_h->client_ctx = stream_if_ctx;
if (st_h->client_ctx->hcc_cur_pe)
{
st_h->client_ctx->hcc_cur_pe = TAILQ_NEXT(
st_h->client_ctx->hcc_cur_pe, next_pe);
if (!st_h->client_ctx->hcc_cur_pe) /* Wrap around */
st_h->client_ctx->hcc_cur_pe =
TAILQ_FIRST(&st_h->client_ctx->hcc_path_elems);
}
else
st_h->client_ctx->hcc_cur_pe = TAILQ_FIRST(
&st_h->client_ctx->hcc_path_elems);
st_h->path = st_h->client_ctx->hcc_cur_pe->path;
if (st_h->client_ctx->payload)
{
st_h->reader.lsqr_read = test_reader_read;
st_h->reader.lsqr_size = test_reader_size;
st_h->reader.lsqr_ctx = create_lsquic_reader_ctx(st_h->client_ctx->payload);
if (!st_h->reader.lsqr_ctx)
exit(1);
}
else
st_h->reader.lsqr_ctx = NULL;
LSQ_INFO("created new stream, path: %s", st_h->path);
lsquic_stream_wantwrite(stream, 1);
return st_h;
}
static void
send_headers (lsquic_stream_ctx_t *st_h)
{
const char *hostname = st_h->client_ctx->hostname;
if (!hostname)
hostname = st_h->client_ctx->prog->prog_hostname;
lsquic_http_header_t headers_arr[] = {
{
.name = { .iov_base = ":method", .iov_len = 7, },
.value = { .iov_base = (void *) st_h->client_ctx->method,
.iov_len = strlen(st_h->client_ctx->method), },
},
{
.name = { .iov_base = ":scheme", .iov_len = 7, },
.value = { .iov_base = "HTTP", .iov_len = 4, }
},
{
.name = { .iov_base = ":path", .iov_len = 5, },
.value = { .iov_base = (void *) st_h->path,
.iov_len = strlen(st_h->path), },
},
{
.name = { ":authority", 10, },
.value = { .iov_base = (void *) hostname,
.iov_len = strlen(hostname), },
},
/*
{
.name = { "host", 4 },
.value = { .iov_base = (void *) st_h->client_ctx->hostname,
.iov_len = strlen(st_h->client_ctx->hostname), },
},
*/
{
.name = { .iov_base = "user-agent", .iov_len = 10, },
.value = { .iov_base = (char *) st_h->client_ctx->prog->prog_settings.es_ua,
.iov_len = strlen(st_h->client_ctx->prog->prog_settings.es_ua), },
},
/* The following headers only gets sent if there is request payload: */
{
.name = { .iov_base = "content-type", .iov_len = 12, },
.value = { .iov_base = "application/octet-stream", .iov_len = 24, },
},
{
.name = { .iov_base = "content-length", .iov_len = 14, },
.value = { .iov_base = (void *) st_h->client_ctx->payload_size,
.iov_len = strlen(st_h->client_ctx->payload_size), },
},
};
lsquic_http_headers_t headers = {
.count = sizeof(headers_arr) / sizeof(headers_arr[0]),
.headers = headers_arr,
};
if (!st_h->client_ctx->payload)
headers.count -= 2;
if (0 != lsquic_stream_send_headers(st_h->stream, &headers,
st_h->client_ctx->payload == NULL))
{
LSQ_ERROR("cannot send headers: %s", strerror(errno));
exit(1);
}
}
static void
http_client_on_write (lsquic_stream_t *stream, lsquic_stream_ctx_t *st_h)
{
ssize_t nw;
if (st_h->sh_flags & HEADERS_SENT)
{
if (st_h->client_ctx->payload && test_reader_size(st_h->reader.lsqr_ctx) > 0)
{
nw = lsquic_stream_writef(stream, &st_h->reader);
if (nw < 0)
{
LSQ_ERROR("write error: %s", strerror(errno));
exit(1);
}
if (test_reader_size(st_h->reader.lsqr_ctx) > 0)
{
lsquic_stream_wantwrite(stream, 1);
}
else
{
lsquic_stream_shutdown(stream, 1);
lsquic_stream_wantread(stream, 1);
}
}
else
{
lsquic_stream_shutdown(stream, 1);
lsquic_stream_wantread(stream, 1);
}
}
else
{
st_h->sh_flags |= HEADERS_SENT;
send_headers(st_h);
}
}
static void
http_client_on_read (lsquic_stream_t *stream, lsquic_stream_ctx_t *st_h)
{
struct http_client_ctx *const client_ctx = st_h->client_ctx;
ssize_t nread;
unsigned old_prio, new_prio;
unsigned char buf[0x200];
unsigned nreads = 0;
#ifdef WIN32
srand(GetTickCount());
#endif
do
{
nread = lsquic_stream_read(stream, buf, sizeof(buf));
if (nread > 0)
{
if (!(client_ctx->hcc_flags & HCC_DISCARD_RESPONSE))
write(STDOUT_FILENO, buf, nread);
if (randomly_reprioritize_streams && (st_h->count++ & 0x3F) == 0)
{
old_prio = lsquic_stream_priority(stream);
new_prio = 1 + (random() & 0xFF);
#ifndef NDEBUG
const int s =
#endif
lsquic_stream_set_priority(stream, new_prio);
assert(s == 0);
LSQ_NOTICE("changed stream %u priority from %u to %u",
lsquic_stream_id(stream), old_prio, new_prio);
}
}
else if (0 == nread)
{
client_ctx->hcc_flags |= HCC_SEEN_FIN;
lsquic_stream_shutdown(stream, 0);
break;
}
else if (client_ctx->prog->prog_settings.es_rw_once && EWOULDBLOCK == errno)
{
LSQ_NOTICE("emptied the buffer in 'once' mode");
break;
}
else
{
LSQ_ERROR("could not read: %s", strerror(errno));
exit(2);
}
}
while (client_ctx->prog->prog_settings.es_rw_once
&& nreads++ < 3 /* Emulate just a few reads */);
}
static void
http_client_on_close (lsquic_stream_t *stream, lsquic_stream_ctx_t *st_h)
{
const int pushed = lsquic_stream_is_pushed(stream);
if (pushed)
{
assert(NULL == st_h);
return;
}
LSQ_INFO("%s called", __func__);
lsquic_conn_t *conn = lsquic_stream_conn(stream);
lsquic_conn_ctx_t *conn_h;
TAILQ_FOREACH(conn_h, &st_h->client_ctx->conn_ctxs, next_ch)
if (conn_h->conn == conn)
break;
assert(conn_h);
--conn_h->ch_n_reqs;
if (0 == conn_h->ch_n_reqs)
{
LSQ_INFO("all requests completed, closing connection");
lsquic_conn_close(conn_h->conn);
}
else
lsquic_conn_make_stream(conn);
if (st_h->reader.lsqr_ctx)
destroy_lsquic_reader_ctx(st_h->reader.lsqr_ctx);
free(st_h);
}
const struct lsquic_stream_if http_client_if = {
.on_new_conn = http_client_on_new_conn,
.on_conn_closed = http_client_on_conn_closed,
.on_new_stream = http_client_on_new_stream,
.on_read = http_client_on_read,
.on_write = http_client_on_write,
.on_close = http_client_on_close,
.on_hsk_done = http_client_on_hsk_done,
};
static void
usage (const char *prog)
{
const char *const slash = strrchr(prog, '/');
if (slash)
prog = slash + 1;
printf(
"Usage: %s [opts]\n"
"\n"
"Options:\n"
" -p PATH Path to request. May be specified more than once.\n"
" -n CONNS Number of concurrent connections. Defaults to 1.\n"
" -r NREQS Total number of requests to send. Defaults to 1.\n"
" -R NREQS Maximum number of requests per single connection. Some\n"
" connections will have fewer requests than this.\n"
" -m METHOD Method. Defaults to GET.\n"
" -P PAYLOAD Name of the file that contains payload to be used in the\n"
" request. This adds two more headers to the request:\n"
" content-type: application/octet-stream and\n"
" content-length\n"
" -K Discard server response\n"
" -I Abort on incomplete reponse from server\n"
" -4 Prefer IPv4 when resolving hostname\n"
" -6 Prefer IPv6 when resolving hostname\n"
, prog);
}
int
main (int argc, char **argv)
{
int opt, s;
struct http_client_ctx client_ctx;
struct stat st;
struct path_elem *pe;
struct sport_head sports;
struct prog prog;
TAILQ_INIT(&sports);
memset(&client_ctx, 0, sizeof(client_ctx));
client_ctx.hcc_concurrency = 1;
TAILQ_INIT(&client_ctx.hcc_path_elems);
TAILQ_INIT(&client_ctx.conn_ctxs);
client_ctx.method = "GET";
client_ctx.hcc_concurrency = 1;
client_ctx.hcc_reqs_per_conn = 1;
client_ctx.hcc_total_n_reqs = 1;
client_ctx.prog = &prog;
#ifdef WIN32
WSADATA wsd;
WSAStartup(MAKEWORD(2, 2), &wsd);
#endif
prog_init(&prog, LSENG_HTTP, &sports, &http_client_if, &client_ctx);
while (-1 != (opt = getopt(argc, argv, PROG_OPTS "46r:R:IKu:EP:M:n:H:p:h")))
{
switch (opt) {
case '4':
case '6':
prog.prog_ipver = opt - '0';
break;
case 'I':
client_ctx.hcc_flags |= HCC_ABORT_ON_INCOMPLETE;
break;
case 'K':
client_ctx.hcc_flags |= HCC_DISCARD_RESPONSE;
break;
case 'u': /* Accept p<U>sh promise */
promise_fd = open(optarg, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (promise_fd < 0)
{
perror("open");
exit(1);
}
prog.prog_settings.es_support_push = 1; /* Pokes into prog */
break;
case 'E': /* E: randomly reprioritize str<E>ams. Now, that's
* pretty random. :)
*/
randomly_reprioritize_streams = 1;
break;
case 'n':
client_ctx.hcc_concurrency = atoi(optarg);
break;
case 'P':
client_ctx.payload = optarg;
if (0 != stat(optarg, &st))
{
perror("stat");
exit(2);
}
sprintf(client_ctx.payload_size, "%jd", (intmax_t) st.st_size);
break;
case 'M':
client_ctx.method = optarg;
break;
case 'r':
client_ctx.hcc_total_n_reqs = atoi(optarg);
break;
case 'R':
client_ctx.hcc_reqs_per_conn = atoi(optarg);
break;
case 'H':
client_ctx.hostname = optarg;
prog.prog_hostname = optarg; /* Pokes into prog */
break;
case 'p':
pe = calloc(1, sizeof(*pe));
pe->path = optarg;
TAILQ_INSERT_TAIL(&client_ctx.hcc_path_elems, pe, next_pe);
break;
case 'h':
usage(argv[0]);
prog_print_common_options(&prog, stdout);
exit(0);
default:
if (0 != prog_set_opt(&prog, opt, optarg))
exit(1);
}
}
if (TAILQ_EMPTY(&client_ctx.hcc_path_elems))
{
fprintf(stderr, "Specify at least one path using -p option\n");
exit(1);
}
if (0 != prog_prep(&prog))
{
LSQ_ERROR("could not prep");
exit(EXIT_FAILURE);
}
create_connections(&client_ctx);
LSQ_DEBUG("entering event loop");
s = prog_run(&prog);
prog_cleanup(&prog);
if (promise_fd >= 0)
(void) close(promise_fd);
exit(0 == s ? EXIT_SUCCESS : EXIT_FAILURE);
}
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