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Add fixes performance and static web server

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This commit is contained in:
Justine Tunney 2020-10-05 23:11:49 -07:00
parent b6793d42d5
commit c45e46f871
108 changed files with 2927 additions and 819 deletions
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72
net/http/parsehttprange.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/str/str.h"
#include "net/http/http.h"
/**
* Parses HTTP Range request header.
*/
bool ParseHttpRange(const char *p, size_t n, long resourcelength,
long *out_start, long *out_length) {
long start, length, ending;
*out_start = 0;
*out_length = 0;
if (memchr(p, ',', n)) return false;
if (n < 7 || memcmp(p, "bytes=", 6) != 0) return false;
p += 6, n -= 6;
if (n && *p == '-') {
++p, --n;
length = 0;
while (n && '0' <= *p && *p <= '9') {
if (__builtin_mul_overflow(length, 10, &length)) return false;
if (__builtin_add_overflow(length, *p - '0', &length)) return false;
++p, --n;
}
if (__builtin_sub_overflow(resourcelength, length, &start)) return false;
} else {
start = 0;
while (n && '0' <= *p && *p <= '9') {
if (__builtin_mul_overflow(start, 10, &start)) return false;
if (__builtin_add_overflow(start, *p - '0', &start)) return false;
++p, --n;
}
if (n && *p == '-') {
++p, --n;
length = 0;
while (n && '0' <= *p && *p <= '9') {
if (__builtin_mul_overflow(length, 10, &length)) return false;
if (__builtin_add_overflow(length, *p - '0', &length)) return false;
++p, --n;
}
if (__builtin_add_overflow(length, 1, &length)) return false;
if (__builtin_sub_overflow(length, start, &length)) return false;
} else if (__builtin_sub_overflow(resourcelength, start, &length)) {
return false;
}
}
if (n) return false;
if (start < 0) return false;
if (length < 0) return false;
*out_start = start;
*out_length = length;
if (__builtin_add_overflow(start, length, &ending)) return false;
if (ending > resourcelength) return false;
return true;
}