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Refactor write_http_response_header_impl() to use buf_t

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This commit is contained in:
Nick Mathewson 2017-09-06 09:08:55 -04:00
parent d5ba4851bd
commit 5240d02a11
1 changed files with 14 additions and 30 deletions
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44
src/or/directory.c
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@ -3503,63 +3503,47 @@ write_http_response_header_impl(dir_connection_t *conn, ssize_t length,
long cache_lifetime)
{
char date[RFC1123_TIME_LEN+1];
char tmp[1024];
char *cp;
time_t now = time(NULL);
buf_t *buf = buf_new_with_capacity(1024);
tor_assert(conn);
format_rfc1123_time(date, now);
cp = tmp;
tor_snprintf(cp, sizeof(tmp),
"HTTP/1.0 200 OK\r\nDate: %s\r\n",
date);
cp += strlen(tmp);
buf_add_printf(buf, "HTTP/1.0 200 OK\r\nDate: %s\r\n", date);
if (type) {
tor_snprintf(cp, sizeof(tmp)-(cp-tmp), "Content-Type: %s\r\n", type);
cp += strlen(cp);
buf_add_printf(buf, "Content-Type: %s\r\n", type);
}
if (!is_local_addr(&conn->base_.addr)) {
/* Don't report the source address for a nearby/private connection.
* Otherwise we tend to mis-report in cases where incoming ports are
* being forwarded to a Tor server running behind the firewall. */
tor_snprintf(cp, sizeof(tmp)-(cp-tmp),
X_ADDRESS_HEADER "%s\r\n", conn->base_.address);
cp += strlen(cp);
buf_add_printf(buf, X_ADDRESS_HEADER "%s\r\n", conn->base_.address);
}
if (encoding) {
tor_snprintf(cp, sizeof(tmp)-(cp-tmp),
"Content-Encoding: %s\r\n", encoding);
cp += strlen(cp);
buf_add_printf(buf, "Content-Encoding: %s\r\n", encoding);
}
if (length >= 0) {
tor_snprintf(cp, sizeof(tmp)-(cp-tmp),
"Content-Length: %ld\r\n", (long)length);
cp += strlen(cp);
buf_add_printf(buf, "Content-Length: %ld\r\n", (long)length);
}
if (cache_lifetime > 0) {
char expbuf[RFC1123_TIME_LEN+1];
format_rfc1123_time(expbuf, (time_t)(now + cache_lifetime));
/* We could say 'Cache-control: max-age=%d' here if we start doing
* http/1.1 */
tor_snprintf(cp, sizeof(tmp)-(cp-tmp),
"Expires: %s\r\n", expbuf);
cp += strlen(cp);
buf_add_printf(buf, "Expires: %s\r\n", expbuf);
} else if (cache_lifetime == 0) {
/* We could say 'Cache-control: no-cache' here if we start doing
* http/1.1 */
strlcpy(cp, "Pragma: no-cache\r\n", sizeof(tmp)-(cp-tmp));
cp += strlen(cp);
buf_add_string(buf, "Pragma: no-cache\r\n");
}
if (extra_headers) {
strlcpy(cp, extra_headers, sizeof(tmp)-(cp-tmp));
cp += strlen(cp);
buf_add_string(buf, extra_headers);
}
if (sizeof(tmp)-(cp-tmp) > 3)
memcpy(cp, "\r\n", 3);
else
tor_assert(0);
connection_buf_add(tmp, strlen(tmp), TO_CONN(conn));
buf_add_string(buf, "\r\n");
connection_buf_add_buf(TO_CONN(conn), buf);
buf_free(buf);
}
/** As write_http_response_header_impl, but sets encoding and content-typed