Mercurial > dovecot > core-2.2
view src/lib-http/http-parser.c @ 15714:90710c6c3beb
Updated copyright notices to include year 2013.
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Sat, 02 Feb 2013 17:01:07 +0200 |
parents | 107c8b2c9594 |
children | 36ef72481934 |
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* Copyright (c) 2013 Dovecot authors, see the included COPYING file */ #include "lib.h" #include "net.h" #include "str.h" #include "strescape.h" #include "http-url.h" #include "http-parser.h" /* Character definitions: tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~" / DIGIT / ALPHA ; any VCHAR, except special special = "(" / ")" / "<" / ">" / "@" / "," / ";" / ":" / "\" / DQUOTE / "/" / "[" / "]" / "?" / "=" / "{" / "}" qdtext = OWS / %x21 / %x23-5B / %x5D-7E / obs-text qdtext-nf = HTAB / SP / %x21 / %x23-5B / %x5D-7E / obs-text ctext = OWS / %x21-27 / %x2A-5B / %x5D-7E / obs-text obs-text = %x80-FF OWS = *( SP / HTAB ) Mapping (1<<0) => tchar (1<<1) => special (1<<2) => %x21 / %x2A-5B / %x5D-7E (1<<3) => %x23-29 (1<<4) => %x22-27 (1<<5) => HTAB / SP / obs-text */ const unsigned char _http_token_char_mask = (1<<0); const unsigned char _http_value_char_mask = (1<<0)|(1<<1); const unsigned char _http_text_char_mask = (1<<0)|(1<<1)|(1<<5); const unsigned char _http_qdtext_char_mask = (1<<2)|(1<<3)|(1<<5); const unsigned char _http_ctext_char_mask = (1<<2)|(1<<4)|(1<<5); const unsigned char _http_char_lookup[256] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, // 00 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 10 32, 21, 18, 25, 25, 25, 25, 25, 10, 10, 5, 5, 6, 5, 5, 6, // 20 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, // 30 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, // 40 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 2, 6, 5, 5, // 50 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, // 60 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 5, 6, 5, 0, // 70 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, // 80 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, // 90 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, // A0 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, // B0 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, // C0 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, // D0 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, // E0 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, // F0 }; /* * HTTP value parsing */ void http_parser_init(struct http_parser *parser, const unsigned char *data, size_t size) { memset(parser, 0, sizeof(*parser)); parser->begin = data; parser->cur = data; parser->end = data + size; } void http_parse_ows(struct http_parser *parser) { /* OWS = *( SP / HTAB ) */ if (parser->cur >= parser->end) return; while (parser->cur < parser->end && (parser->cur[0] == ' ' || parser->cur[0] == '\t')) { parser->cur++; } } int http_parse_token(struct http_parser *parser, const char **token_r) { const unsigned char *first; /* token = 1*tchar */ if (parser->cur >= parser->end || !http_char_is_token(*parser->cur)) return 0; first = parser->cur++; while (parser->cur < parser->end && http_char_is_token(*parser->cur)) parser->cur++; *token_r = t_strndup(first, parser->cur - first); return 1; } int http_parse_token_list_next(struct http_parser *parser, const char **token_r) { /* http://tools.ietf.org/html/draft-ietf-httpbis-p1-messaging-21; Appendix B: For compatibility with legacy list rules, recipients SHOULD accept empty list elements. In other words, consumers would follow the list productions: #element => [ ( "," / element ) *( OWS "," [ OWS element ] ) ] 1#element => *( "," OWS ) element *( OWS "," [ OWS element ] ) */ for (;;) { if (http_parse_token(parser, token_r) > 0) break; http_parse_ows(parser); if (parser->cur >= parser->end || parser->cur[0] != ',') return 0; parser->cur++; http_parse_ows(parser); } return 1; }