mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-13 15:57:23 +03:00
147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
/*
|
|
* Copyright 2010 John-Mark Bell <jmb@netsurf-browser.org>
|
|
*
|
|
* This file is part of NetSurf, http://www.netsurf-browser.org/
|
|
*
|
|
* NetSurf is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* NetSurf is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <inttypes.h>
|
|
#include <stdbool.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "utils/http/primitives.h"
|
|
|
|
/**
|
|
* Skip past linear whitespace in input
|
|
*
|
|
* \param input Pointer to current input byte. Updated on exit.
|
|
*/
|
|
void http__skip_LWS(const char **input)
|
|
{
|
|
const char *pos = *input;
|
|
|
|
while (*pos == ' ' || *pos == '\t')
|
|
pos++;
|
|
|
|
*input = pos;
|
|
}
|
|
|
|
/**
|
|
* Determine if a character is valid for an HTTP token
|
|
*
|
|
* \param c Character to consider
|
|
* \return True if character is valid, false otherwise
|
|
*/
|
|
static bool http_is_token_char(uint8_t c)
|
|
{
|
|
/* [ 32 - 126 ] except ()<>@,;:\"/[]?={} SP HT */
|
|
|
|
if (c <= ' ' || 126 < c)
|
|
return false;
|
|
|
|
return (strchr("()<>@,;:\\\"/[]?={}", c) == NULL);
|
|
}
|
|
|
|
/**
|
|
* Parse an HTTP token
|
|
*
|
|
* \param input Pointer to current input byte. Updated on exit.
|
|
* \param value Pointer to location to receive on-heap token value.
|
|
* \return NSERROR_OK on success,
|
|
* NSERROR_NOMEM on memory exhaustion,
|
|
* NSERROR_NOT_FOUND if no token could be parsed
|
|
*
|
|
* The returned value is owned by the caller
|
|
*/
|
|
nserror http__parse_token(const char **input, lwc_string **value)
|
|
{
|
|
const uint8_t *start = (const uint8_t *) *input;
|
|
const uint8_t *end;
|
|
lwc_string *token;
|
|
|
|
end = start;
|
|
while (http_is_token_char(*end))
|
|
end++;
|
|
|
|
if (end == start)
|
|
return NSERROR_NOT_FOUND;
|
|
|
|
if (lwc_intern_string((const char *) start,
|
|
end - start, &token) != lwc_error_ok)
|
|
return NSERROR_NOMEM;
|
|
|
|
*value = token;
|
|
*input = (const char *) end;
|
|
|
|
return NSERROR_OK;
|
|
}
|
|
|
|
/**
|
|
* Parse an HTTP quoted-string
|
|
*
|
|
* \param input Pointer to current input byte. Updated on exit.
|
|
* \param value Pointer to location to receive on-heap string value.
|
|
* \return NSERROR_OK on success,
|
|
* NSERROR_NOMEM on memory exhaustion,
|
|
* NSERROR_NOT_FOUND if no string could be parsed
|
|
*
|
|
* The returned value is owned by the caller
|
|
*/
|
|
nserror http__parse_quoted_string(const char **input, lwc_string **value)
|
|
{
|
|
const uint8_t *start = (const uint8_t *) *input;
|
|
const uint8_t *end;
|
|
uint8_t c;
|
|
lwc_string *string_value;
|
|
|
|
/* <"> *( qdtext | quoted-pair ) <">
|
|
* qdtext = any TEXT except <">
|
|
* quoted-pair = "\" CHAR
|
|
* TEXT = [ HT, CR, LF, 32-126, 128-255 ]
|
|
* CHAR = [ 0 - 127 ]
|
|
*
|
|
* \todo TEXT may contain non 8859-1 chars encoded per RFC 2047
|
|
* \todo Support quoted-pairs
|
|
*/
|
|
|
|
if (*start != '"')
|
|
return NSERROR_NOT_FOUND;
|
|
|
|
end = start = start + 1;
|
|
|
|
c = *end;
|
|
while (c == '\t' || c == '\r' || c == '\n' ||
|
|
c == ' ' || c == '!' ||
|
|
('#' <= c && c <= 126) || c > 127) {
|
|
end++;
|
|
c = *end;
|
|
}
|
|
|
|
if (*end != '"')
|
|
return NSERROR_NOT_FOUND;
|
|
|
|
if (lwc_intern_string((const char *) start, end - start,
|
|
&string_value) != lwc_error_ok)
|
|
return NSERROR_NOMEM;
|
|
|
|
*value = string_value;
|
|
|
|
*input = (const char *) end + 1;
|
|
|
|
return NSERROR_OK;
|
|
}
|
|
|
|
|