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/* As of FreeBSD 13.2, sigaction(2) still conforms to IEEE Std
* 1003.1-1990 (POSIX.1), which did not define SA_RESTART.
* FreeBSD supports it as an extension, but then _POSIX_C_SOURCE must
* not be defined. */
#ifndef __FreeBSD__
#define _POSIX_C_SOURCE 200809L
#endif
#include <dynstr.h>
#include <libweb/handler.h>
#include <libweb/html.h>
#include <libweb/http.h>
#include <errno.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static int send_response(const unsigned cnt, struct http_response *const r)
{
int ret = -1;
struct html_node *html = html_node_alloc("html"), *body, *p;
struct dynstr d, text;
dynstr_init(&d);
dynstr_init(&text);
if (!html)
{
fprintf(stderr, "%s: html_node_alloc failed\n", __func__);
goto end;
}
else if (!(body = html_node_add_child(html, "body")))
{
fprintf(stderr, "%s: html_node_add_child body failed\n", __func__);
goto end;
}
else if (!(p = html_node_add_child(body, "p")))
{
fprintf(stderr, "%s: html_node_add_child p failed\n", __func__);
goto end;
}
else if (dynstr_append(&text, "It took %u iterations to generate "
"this response!", cnt))
{
fprintf(stderr, "%s: dynstr_append failed\n", __func__);
goto end;
}
else if (html_node_set_value(p, text.str))
{
fprintf(stderr, "%s: html_node_set_value p failed\n", __func__);
goto end;
}
else if (html_serialize(html, &d))
{
fprintf(stderr, "%s: html_serialize failed\n", __func__);
goto end;
}
*r = (const struct http_response)
{
.status = HTTP_STATUS_OK,
.buf.rw = d.str,
.n = d.len,
.free = free
};
if (http_response_add_header(r, "Content-Type", "text/html"))
{
fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
goto end;
}
ret = 0;
end:
dynstr_free(&text);
html_node_free(html);
if (ret)
dynstr_free(&d);
return ret;
}
static int step(const struct http_payload *const pl,
struct http_response *const r, void *const user, void *step_args)
{
unsigned *const cnt = step_args;
const unsigned max = 10;
fprintf(stderr, "%s: step %u\n", __func__, *cnt);
if (++(*cnt) >= max)
return send_response(*cnt, r);
return 0;
}
static int hello(const struct http_payload *const pl,
struct http_response *const r, void *const user)
{
unsigned *const cnt = malloc(sizeof *cnt);
if (!cnt)
{
fprintf(stderr, "%s: malloc(3): %s\n", __func__, strerror(errno));
return -1;
}
*r = (const struct http_response)
{
.step.payload = step,
.step_args = cnt
};
*cnt = 0;
return 0;
}
static int on_length(const unsigned long long len,
const struct http_cookie *const c, struct http_response *const r,
void *const user)
{
*r = (const struct http_response)
{
.status = HTTP_STATUS_FORBIDDEN
};
return 1;
}
struct handler *handler;
static void handle_signal(const int signum)
{
switch (signum)
{
case SIGINT:
/* Fall through. */
case SIGTERM:
handler_notify_close(handler);
break;
default:
break;
}
}
static int init_signals(void)
{
struct sigaction sa =
{
.sa_handler = handle_signal,
.sa_flags = SA_RESTART
};
sigemptyset(&sa.sa_mask);
static const struct signal
{
int signal;
const char *name;
} signals[] =
{
{.signal = SIGINT, .name = "SIGINT"},
{.signal = SIGTERM, .name = "SIGTERM"},
{.signal = SIGPIPE, .name = "SIGPIPE"}
};
for (size_t i = 0; i < sizeof signals / sizeof *signals; i++)
{
const struct signal *const s = &signals[i];
if (sigaction(s->signal, &sa, NULL))
{
fprintf(stderr, "%s: sigaction(2) %s: %s\n",
__func__, s->name, strerror(errno));
return -1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
int ret = EXIT_FAILURE;
const struct handler_cfg cfg =
{
.length = on_length
};
static const char *const urls[] = {"/", "/index.html"};
if (!(handler = handler_alloc(&cfg)))
{
fprintf(stderr, "%s: handler_alloc failed\n", __func__);
goto end;
}
for (size_t i = 0; i < sizeof urls / sizeof *urls; i++)
if (handler_add(handler, urls[i], HTTP_OP_GET, hello, NULL))
{
fprintf(stderr, "%s: handler_add failed\n", __func__);
goto end;
}
unsigned short outport;
if (handler_listen(handler, 0, &outport))
{
fprintf(stderr, "%s: handler_listen failed\n", __func__);
goto end;
}
printf("Listening on port %hu\n", outport);
if (handler_loop(handler))
{
fprintf(stderr, "%s: handler_loop failed\n", __func__);
goto end;
}
ret = EXIT_SUCCESS;
end:
handler_free(handler);
return ret;
}
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