diff options
Diffstat (limited to 'src/libtipidee/tipidee_uri_parse.c')
| -rw-r--r-- | src/libtipidee/tipidee_uri_parse.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/libtipidee/tipidee_uri_parse.c b/src/libtipidee/tipidee_uri_parse.c new file mode 100644 index 0000000..10b0f91 --- /dev/null +++ b/src/libtipidee/tipidee_uri_parse.c @@ -0,0 +1,184 @@ +/* ISC license. */ + +#include <stdint.h> +#include <string.h> + +#include <skalibs/uint16.h> +#include <skalibs/bytestr.h> +#include <skalibs/fmtscan.h> +#include <skalibs/lolstdio.h> + +#include <tipidee/uri.h> + + +/* + + Decodes an URI. + Accepts absolute (http and https) and local, decodes %-encoding up to ? query. + +st\ev 0 1 2 3 4 5 6 7 8 9 a b c d e + \0 invalid % ? / : @ h t p s 0-9 a-f other delim + +00 Pp +START X X X X PATH? X X H X X X X X X X + +01 +H X X X X X X X X HT X X X X X X + +02 +HT X X X X X X X X HTT X X X X X X + +03 +HTT X X X X X X X X X HTTP X X X X X + +04 +HTTP X X X X X AUTH X X X X HTTPS X X X X + +05 s +HTTPS X X X X X AUTH X X X X X X X X X + +06 +AUTH X X X X AUTH/ X X X X X X X X X X + +07 +AUTH/ X X X X HOST X X X X X X X X X X + +08 H Hp Hp Hp Hp Hp Hp Hp Hp +HOST X X HQ H1 X X X H1 H1 H1 H1 H1 H1 H1 X + +09 p a a +HQ X X H1 X X X X X X X X HQ1 HQ1 X X + +0a ab ab +HQ1 X X X X X X X X X X X H1 H1 X X + +0b p zPp zm p p p p p p p +H1 END X HQ H1 PATH PORT X H1 H1 H1 H1 H1 H1 H1 X + +0c Pp p +PORT X X X X PATH X X X X X X PORT1 X X X + +0d zc zcPp p +PORT1 END X X X PATH X X X X X X PORT1 X X X + +0e p zQ p p p p p p p p p p +PATH END X Q QUERY PATH PATH PATH PATH PATH PATH PATH PATH PATH PATH X + +0f p a a +Q X X PATH X X X X X X X X Q1 Q1 X X + +10 ab ab +Q1 X X X X X X X X X X X PATH PATH X X + +11 p p p p p p p p p p p p p p +QUERY END X QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY QUERY + +12 p zQ p p p p p p p p p +PATH? END X Q QUERY X PATH PATH PATH PATH PATH PATH PATH PATH PATH X + +st\ev 0 1 2 3 4 5 6 7 8 9 a b c d e + \0 invalid % ? / : @ h t p s 0-9 a-f other delim + +END = 13, X = 14 + +0x8000 s ssl +0x4000 H start host +0x2000 z print \0 +0x1000 m mark +0x0800 c scan port from mark, reset to mark +0x0400 P start path +0x0200 p print cur +0x0100 Q start query +0x0080 a push num +0x0040 b decode num, print num, reinit + +*/ + +static inline uint8_t uridecode_cclass (char c) +{ + static uint8_t const table[128] = "01111111111111111111111111111111161162>>>>>=>==4;;;;;;;;;;5>>=>36<<<<<<====================>1>==1<<<<<<=7=======9==:8======111=1" ; + return c < 0 ? 1 : table[(uint8_t)c] - '0' ; +} + +size_t tipidee_uri_parse (char *out, size_t max, char const *in, tipidee_uri *uri) +{ + static uint16_t const table[19][15] = + { + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0612, 0x0014, 0x0014, 0x0001, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0002, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0003, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0004, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0006, 0x0014, 0x0014, 0x0014, 0x0014, 0x0005, 0x0014, 0x0014, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x8006, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0007, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0008, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x4009, 0x420b, 0x0014, 0x0014, 0x0014, 0x420b, 0x420b, 0x420b, 0x420b, 0x420b, 0x420b, 0x420b, 0x0014 }, + { 0x0014, 0x0014, 0x020b, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x008a, 0x008a, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x00cb, 0x00cb, 0x0014, 0x0014 }, + { 0x0213, 0x0014, 0x0009, 0x000b, 0x260e, 0x300c, 0x0014, 0x020b, 0x020b, 0x020b, 0x020b, 0x020b, 0x020b, 0x020b, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x060e, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x020d, 0x0014, 0x0014, 0x0014 }, + { 0x2813, 0x0014, 0x0014, 0x0014, 0x2e0e, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x020d, 0x0014, 0x0014, 0x0014 }, + { 0x0213, 0x0014, 0x000f, 0x2111, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x0014 }, + { 0x0014, 0x0014, 0x020e, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0090, 0x0090, 0x0014, 0x0014 }, + { 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x0014, 0x00ce, 0x00ce, 0x0014, 0x0014 }, + { 0x0213, 0x0014, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211, 0x0211 }, + { 0x0213, 0x0014, 0x000f, 0x2111, 0x0014, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x020e, 0x0014 } + } ; + size_t w = 0, lastslash = 0, mark = 0 ; + char const *host = 0 ; + char const *path = 0 ; + char const *query = 0 ; + uint16_t port = 0 ; + uint16_t state = 0 ; + unsigned char decoded = 0 ; + uint8_t ssl = 0 ; + for (; state < 0x13 ; in++) + { + uint16_t c = table[state][uridecode_cclass(*in)] ; +/* + LOLDEBUG("tipidee_uri_parse: state %hu, event %c, newstate %hu, actions %s%s%s%s%s%s%s%s%s%s", state, *in, c & 0x1f, + c & 0x8000 ? "s" : "", + c & 0x4000 ? "H" : "", + c & 0x2000 ? "z" : "", + c & 0x1000 ? "m" : "", + c & 0x0800 ? "c" : "", + c & 0x0400 ? "P" : "", + c & 0x0200 ? "p" : "", + c & 0x0100 ? "Q" : "", + c & 0x0080 ? "a" : "", + c & 0x0040 ? "b" : "" + ) ; +*/ + state = c & 0x1f ; + if (c & 0x8000) ssl = 1 ; + if (c & 0x4000) host = out + w ; + if (c & 0x2000) { if (w >= max) return 0 ; out[w++] = 0 ; } + if (c & 0x1000) mark = w ; + if (c & 0x0800) { if (!uint160_scan(out + mark, &port)) return 0 ; w = mark ; } + if (c & 0x0400) path = out + w ; + if (c & 0x0200) { if (w >= max) return 0 ; out[w++] = *in ; } + if (c & 0x0100) query = out + w ; + if (c & 0x0080) decoded = (decoded << 4) | fmtscan_num(*in, 16) ; + if (c & 0x0040) + { + if (w >= max) return 0 ; + if (decoded == '/') lastslash = w ; + out[w++] = decoded ; + decoded = 0 ; + } + } + if (state > 0x13) return 0 ; + if (path) + { + size_t len = strlen(path) ; + if (len >= 3 && !memcmp(path + len - 3, "/..", 3)) return 0 ; + if (strstr(path, "/../")) return 0 ; + } + uri->host = host ; + uri->port = port ; + uri->path = path ? path : "/" ; + uri->query = query ; + uri->lastslash = path ? lastslash - (path - out) : 0 ; + uri->https = ssl ; + return w ; +} |