| #include "git-compat-util.h" |
| #include "hex.h" |
| #include "strbuf.h" |
| #include "url.h" |
| |
| int is_urlschemechar(int first_flag, int ch) |
| { |
| /* |
| * The set of valid URL schemes, as per STD66 (RFC3986) is |
| * '[A-Za-z][A-Za-z0-9+.-]*'. But use slightly looser check |
| * of '[A-Za-z0-9][A-Za-z0-9+.-]*' because earlier version |
| * of check used '[A-Za-z0-9]+' so not to break any remote |
| * helpers. |
| */ |
| int alphanumeric, special; |
| alphanumeric = ch > 0 && isalnum(ch); |
| special = ch == '+' || ch == '-' || ch == '.'; |
| return alphanumeric || (!first_flag && special); |
| } |
| |
| int is_url(const char *url) |
| { |
| /* Is "scheme" part reasonable? */ |
| if (!url || !is_urlschemechar(1, *url++)) |
| return 0; |
| while (*url && *url != ':') { |
| if (!is_urlschemechar(0, *url++)) |
| return 0; |
| } |
| /* We've seen "scheme"; we want colon-slash-slash */ |
| return (url[0] == ':' && url[1] == '/' && url[2] == '/'); |
| } |
| |
| static char *url_decode_internal(const char **query, int len, |
| const char *stop_at, struct strbuf *out, |
| int decode_plus) |
| { |
| const char *q = *query; |
| |
| while (len) { |
| unsigned char c = *q; |
| |
| if (!c) |
| break; |
| if (stop_at && strchr(stop_at, c)) { |
| q++; |
| len--; |
| break; |
| } |
| |
| if (c == '%' && (len < 0 || len >= 3)) { |
| int val = hex2chr(q + 1); |
| if (0 < val) { |
| strbuf_addch(out, val); |
| q += 3; |
| len -= 3; |
| continue; |
| } |
| } |
| |
| if (decode_plus && c == '+') |
| strbuf_addch(out, ' '); |
| else |
| strbuf_addch(out, c); |
| q++; |
| len--; |
| } |
| *query = q; |
| return strbuf_detach(out, NULL); |
| } |
| |
| char *url_decode(const char *url) |
| { |
| return url_decode_mem(url, strlen(url)); |
| } |
| |
| char *url_decode_mem(const char *url, int len) |
| { |
| struct strbuf out = STRBUF_INIT; |
| const char *colon = memchr(url, ':', len); |
| |
| /* Skip protocol part if present */ |
| if (colon && url < colon) { |
| strbuf_add(&out, url, colon - url); |
| len -= colon - url; |
| url = colon; |
| } |
| return url_decode_internal(&url, len, NULL, &out, 0); |
| } |
| |
| char *url_percent_decode(const char *encoded) |
| { |
| struct strbuf out = STRBUF_INIT; |
| return url_decode_internal(&encoded, strlen(encoded), NULL, &out, 0); |
| } |
| |
| char *url_decode_parameter_name(const char **query) |
| { |
| struct strbuf out = STRBUF_INIT; |
| return url_decode_internal(query, -1, "&=", &out, 1); |
| } |
| |
| char *url_decode_parameter_value(const char **query) |
| { |
| struct strbuf out = STRBUF_INIT; |
| return url_decode_internal(query, -1, "&", &out, 1); |
| } |
| |
| void end_url_with_slash(struct strbuf *buf, const char *url) |
| { |
| strbuf_addstr(buf, url); |
| strbuf_complete(buf, '/'); |
| } |
| |
| void str_end_url_with_slash(const char *url, char **dest) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| end_url_with_slash(&buf, url); |
| free(*dest); |
| *dest = strbuf_detach(&buf, NULL); |
| } |