1 /* @file urlencode.cc
2 * @brief URL encoding as described by RFC3986.
3 */
4 /* Copyright (C) 2011,2014 Olly Betts
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #include <config.h>
26
27 #include "urlencode.h"
28
29 #include <cstring>
30 #include <string>
31
32 using namespace std;
33
34 void
url_encode_(string & res,const char * p,size_t len,const char * safe)35 url_encode_(string & res, const char * p, size_t len, const char * safe)
36 {
37 while (len--) {
38 unsigned char ch = *p++;
39 if ((unsigned(ch) | 32u) - unsigned('a') <= unsigned('z' - 'a') ||
40 unsigned(ch) - unsigned('0') <= unsigned('9' - '0') ||
41 strchr(safe, ch)) {
42 // Unreserved by RFC3986.
43 res += ch;
44 } else {
45 // RFC3986 says we "should" encode as upper case hex digits.
46 res += '%';
47 res += "0123456789ABCDEF"[ch >> 4];
48 res += "0123456789ABCDEF"[ch & 0x0f];
49 }
50 }
51 }
52
53 void
url_encode_path_lite(string & res,const char * p,size_t len)54 url_encode_path_lite(string & res, const char * p, size_t len)
55 {
56 for (size_t i = 0; i != len; ++i) {
57 unsigned char ch = p[i];
58 if (ch < ' ' || strchr("#%:?", ch)) {
59 url_encode_(res, p, len, "/-._~");
60 return;
61 }
62 }
63 res.append(p, len);
64 }
65