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/* 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 & 0x80 ? 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) || !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 ;
}
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