4effa23528
- POSIX regular expressions for Lua - Improved protocol parsing and encoding - Additional APIs for ZIP storage retrieval - Fix st_mode issue on NT for regular files - Generalized APIs for URL and Host handling - Worked out the kinks in resource resolution - Allow for custom error pages like /404.html
86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/str/str.h"
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#include "libc/x/x.h"
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#include "net/http/escape.h"
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/**
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* Escapes HTML entities.
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*
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* @param size if -1 implies strlen
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*/
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struct EscapeResult EscapeHtml(const char *data, size_t size) {
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int c;
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char *p;
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size_t i;
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struct EscapeResult r;
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if (size == -1) size = data ? strlen(data) : 0;
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p = r.data = xmalloc(size * 6 + 1);
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for (i = 0; i < size; ++i) {
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switch ((c = data[i])) {
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case '&':
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p[0] = '&';
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p[1] = 'a';
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p[2] = 'm';
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p[3] = 'p';
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p[4] = ';';
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p += 5;
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break;
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case '<':
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p[0] = '&';
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p[1] = 'l';
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p[2] = 't';
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p[3] = ';';
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p += 4;
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break;
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case '>':
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p[0] = '&';
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p[1] = 'g';
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p[2] = 't';
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p[3] = ';';
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p += 4;
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break;
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case '"':
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p[0] = '&';
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p[1] = 'q';
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p[2] = 'u';
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p[3] = 'o';
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p[4] = 't';
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p[5] = ';';
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p += 6;
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break;
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case '\'':
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p[0] = '&';
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p[1] = '#';
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p[2] = '3';
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p[3] = '9';
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p[4] = ';';
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p += 5;
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break;
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default:
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*p++ = c;
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break;
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}
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}
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r.size = p - r.data;
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r.data = xrealloc(r.data, r.size + 1);
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r.data[r.size] = '\0';
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return r;
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}
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