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/* fakehttp - A fake HTTP server used by the nmh test suite
*
* This code is Copyright (c) 2014, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "server.h"
#define PIDFN "/tmp/fakehttp.pid"
static void
strip_cr(char *buf, ssize_t *len)
{
ssize_t src, dst;
for (src = dst = 0; src < *len; src++) {
buf[dst] = buf[src];
if (buf[src] != '\r') {
dst++;
}
}
*len -= src - dst;
}
static void
save_req(int conn, FILE *req)
{
char buf[BUFSIZ];
ssize_t r;
int e; /* used to save errno */
int started = 0; /* whether the request has started coming in */
if (fcntl(conn, F_SETFL, O_NONBLOCK) < 0) {
fprintf(stderr, "Unable to make socket non-blocking: %s\n",
strerror(errno));
exit(1);
}
for (;;) {
r = read(conn, buf, sizeof buf);
if (!started) {
/* First keep trying until some data is ready; for testing, don't
* bother with using select to wait for input. */
if (r < 0) {
e = errno;
if (e == EAGAIN || e == EWOULDBLOCK) {
continue; /* keep waiting */
}
fclose(req);
fprintf(stderr, "Unable to read socket: %s\n", strerror(e));
exit(1);
}
/* Request is here. Fall through to the fwrite below and keep
* reading. */
started = 1;
}
if (r < 0) {
e = errno;
putc('\n', req); /* req body usually has no newline */
fclose(req);
if (e != EAGAIN && e != EWOULDBLOCK) {
fprintf(stderr, "Unable to read socket: %s\n", strerror(e));
exit(1);
}
/* For testing, we can get away without understand the HTTP request
* and just treating the would-block case as meaning the request is
* all done. */
return;
}
strip_cr(buf, &r);
fwrite(buf, 1, r, req);
}
}
static void
send_res(int conn, FILE *res)
{
size_t size;
ssize_t len;
char *res_line = NULL;
while ((len = getline(&res_line, &size, res)) > 0) {
res_line[len - 1] = '\0';
putcrlf(conn, res_line);
}
free(res_line);
if (!feof(res)) {
fprintf(stderr, "read response failed: %s\n", strerror(errno));
exit(1);
}
}
int
main(int argc, char *argv[])
{
struct st;
int conn;
FILE *req, *res;
if (argc != 4) {
fprintf(stderr, "Usage: %s output-filename port response\n",
argv[0]);
exit(1);
}
if (!(req = fopen(argv[1], "w"))) {
fprintf(stderr, "Unable to open output file \"%s\": %s\n",
argv[1], strerror(errno));
exit(1);
}
if (!(res = fopen(argv[3], "r"))) {
fprintf(stderr, "Unable to open response \"%s\": %s\n",
argv[3], strerror(errno));
exit(1);
}
conn = serve(PIDFN, argv[2]);
save_req(conn, req);
send_res(conn, res);
close(conn);
return 0;
}
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