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chromium / external / github.com / git / git / refs/tags/v2.45.0 / . / url.c
blob: 282b12495ae7d4af9db51a76017af6065b924d3a [file] [log] [blame]
Elijah Newrenfc7bd512023-02-24 00:09:34[diff] [blame]1#include "git-compat-util.h"
Calvin Wand88e8102023-09-29 21:20:48[diff] [blame]2#include "hex-ll.h"
Elijah Newrenfc7bd512023-02-24 00:09:34[diff] [blame]3#include "strbuf.h"
Stephen Boydc2e86ad2011-03-22 07:51:05[diff] [blame]4#include "url.h"
Jeff King638794c2010-05-23 09:17:55[diff] [blame]5
6int is_urlschemechar(int first_flag, int ch)
7{
8 /*
9 * The set of valid URL schemes, as per STD66 (RFC3986) is
Elijah Newren15beaaa2019-11-05 17:07:23[diff] [blame]10 * '[A-Za-z][A-Za-z0-9+.-]*'. But use slightly looser check
Jeff King638794c2010-05-23 09:17:55[diff] [blame]11 * of '[A-Za-z0-9][A-Za-z0-9+.-]*' because earlier version
12 * of check used '[A-Za-z0-9]+' so not to break any remote
13 * helpers.
14 */
15 int alphanumeric, special;
16 alphanumeric = ch > 0 && isalnum(ch);
17 special = ch == '+' || ch == '-' || ch == '.';
18 return alphanumeric || (!first_flag && special);
19}
20
21int is_url(const char *url)
22{
Junio C Hamanob33a1b92011-10-03 17:56:42[diff] [blame]23 /* Is "scheme" part reasonable? */
24 if (!url || !is_urlschemechar(1, *url++))
Jeff King638794c2010-05-23 09:17:55[diff] [blame]25 return 0;
Junio C Hamanob33a1b92011-10-03 17:56:42[diff] [blame]26 while (*url && *url != ':') {
27 if (!is_urlschemechar(0, *url++))
Jeff King638794c2010-05-23 09:17:55[diff] [blame]28 return 0;
Jeff King638794c2010-05-23 09:17:55[diff] [blame]29 }
Junio C Hamanob33a1b92011-10-03 17:56:42[diff] [blame]30 /* We've seen "scheme"; we want colon-slash-slash */
31 return (url[0] == ':' && url[1] == '/' && url[2] == '/');
Jeff King638794c2010-05-23 09:17:55[diff] [blame]32}
33
Jeff King66c84482011-07-18 07:48:51[diff] [blame]34static char *url_decode_internal(const char **query, int len,
35 const char *stop_at, struct strbuf *out,
36 int decode_plus)
Jeff King638794c2010-05-23 09:17:55[diff] [blame]37{
38 const char *q = *query;
Jeff King638794c2010-05-23 09:17:55[diff] [blame]39
Jeff King66c84482011-07-18 07:48:51[diff] [blame]40 while (len) {
Jeff King638794c2010-05-23 09:17:55[diff] [blame]41 unsigned char c = *q;
42
43 if (!c)
44 break;
45 if (stop_at && strchr(stop_at, c)) {
46 q++;
Jeff King66c84482011-07-18 07:48:51[diff] [blame]47 len--;
Jeff King638794c2010-05-23 09:17:55[diff] [blame]48 break;
49 }
50
Matthew DeVore3f6b8a62019-06-04 17:57:04[diff] [blame]51 if (c == '%' && (len < 0 || len >= 3)) {
René Scharfed2330972016-09-03 15:59:20[diff] [blame]52 int val = hex2chr(q + 1);
Matthew DeVored37dc232019-06-04 17:57:05[diff] [blame]53 if (0 < val) {
Junio C Hamanoce83eda2010-06-23 17:27:39[diff] [blame]54 strbuf_addch(out, val);
Jeff King638794c2010-05-23 09:17:55[diff] [blame]55 q += 3;
Jeff King66c84482011-07-18 07:48:51[diff] [blame]56 len -= 3;
Jeff King638794c2010-05-23 09:17:55[diff] [blame]57 continue;
58 }
59 }
60
Thomas Rast730220d2010-07-24 14:49:04[diff] [blame]61 if (decode_plus && c == '+')
Junio C Hamanoce83eda2010-06-23 17:27:39[diff] [blame]62 strbuf_addch(out, ' ');
Jeff King638794c2010-05-23 09:17:55[diff] [blame]63 else
Junio C Hamanoce83eda2010-06-23 17:27:39[diff] [blame]64 strbuf_addch(out, c);
Jeff King638794c2010-05-23 09:17:55[diff] [blame]65 q++;
Jeff King66c84482011-07-18 07:48:51[diff] [blame]66 len--;
67 }
Jeff King638794c2010-05-23 09:17:55[diff] [blame]68 *query = q;
Junio C Hamanoce83eda2010-06-23 17:27:39[diff] [blame]69 return strbuf_detach(out, NULL);
Jeff King638794c2010-05-23 09:17:55[diff] [blame]70}
71
72char *url_decode(const char *url)
73{
Jeff King66c84482011-07-18 07:48:51[diff] [blame]74 return url_decode_mem(url, strlen(url));
75}
76
77char *url_decode_mem(const char *url, int len)
78{
Junio C Hamanoce83eda2010-06-23 17:27:39[diff] [blame]79 struct strbuf out = STRBUF_INIT;
Jeff King66c84482011-07-18 07:48:51[diff] [blame]80 const char *colon = memchr(url, ':', len);
Junio C Hamanoce83eda2010-06-23 17:27:39[diff] [blame]81
82 /* Skip protocol part if present */
Junio C Hamano3c73a1d2010-06-24 20:36:30[diff] [blame]83 if (colon && url < colon) {
84 strbuf_add(&out, url, colon - url);
Jeff King66c84482011-07-18 07:48:51[diff] [blame]85 len -= colon - url;
Junio C Hamano3c73a1d2010-06-24 20:36:30[diff] [blame]86 url = colon;
Junio C Hamanoce83eda2010-06-23 17:27:39[diff] [blame]87 }
Jeff King66c84482011-07-18 07:48:51[diff] [blame]88 return url_decode_internal(&url, len, NULL, &out, 0);
Jeff King638794c2010-05-23 09:17:55[diff] [blame]89}
90
Matthew DeVoree987df52019-06-27 22:54:08[diff] [blame]91char *url_percent_decode(const char *encoded)
92{
93 struct strbuf out = STRBUF_INIT;
94 return url_decode_internal(&encoded, strlen(encoded), NULL, &out, 0);
95}
96
Jeff King638794c2010-05-23 09:17:55[diff] [blame]97char *url_decode_parameter_name(const char **query)
98{
Junio C Hamanoce83eda2010-06-23 17:27:39[diff] [blame]99 struct strbuf out = STRBUF_INIT;
Jeff King66c84482011-07-18 07:48:51[diff] [blame]100 return url_decode_internal(query, -1, "&=", &out, 1);
Jeff King638794c2010-05-23 09:17:55[diff] [blame]101}
102
103char *url_decode_parameter_value(const char **query)
104{
Junio C Hamanoce83eda2010-06-23 17:27:39[diff] [blame]105 struct strbuf out = STRBUF_INIT;
Jeff King66c84482011-07-18 07:48:51[diff] [blame]106 return url_decode_internal(query, -1, "&", &out, 1);
Jeff King638794c2010-05-23 09:17:55[diff] [blame]107}
Tay Ray Chuan1966d9f2010-11-25 08:21:04[diff] [blame]108
109void end_url_with_slash(struct strbuf *buf, const char *url)
110{
111 strbuf_addstr(buf, url);
Jeff King00b6c172015-09-24 21:08:35[diff] [blame]112 strbuf_complete(buf, '/');
Tay Ray Chuan1966d9f2010-11-25 08:21:04[diff] [blame]113}
Tay Ray Chuan3793a302010-11-25 08:21:05[diff] [blame]114
Nguyễn Thái Ngọc Duy3b335762018-12-09 10:25:21[diff] [blame]115void str_end_url_with_slash(const char *url, char **dest)
116{
Tay Ray Chuan3793a302010-11-25 08:21:05[diff] [blame]117 struct strbuf buf = STRBUF_INIT;
118 end_url_with_slash(&buf, url);
119 free(*dest);
120 *dest = strbuf_detach(&buf, NULL);
121}