mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-17 01:33:16 +03:00
147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
/*
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* Copyright 2010 John-Mark Bell <jmb@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <inttypes.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include "utils/http/primitives.h"
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/**
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* Skip past linear whitespace in input
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*
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* \param input Pointer to current input byte. Updated on exit.
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*/
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void http__skip_LWS(const char **input)
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{
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const char *pos = *input;
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while (*pos == ' ' || *pos == '\t')
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pos++;
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*input = pos;
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}
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/**
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* Determine if a character is valid for an HTTP token
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*
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* \param c Character to consider
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* \return True if character is valid, false otherwise
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*/
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static bool http_is_token_char(uint8_t c)
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{
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/* [ 32 - 126 ] except ()<>@,;:\"/[]?={} SP HT */
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if (c <= ' ' || 126 < c)
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return false;
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return (strchr("()<>@,;:\\\"/[]?={}", c) == NULL);
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}
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/**
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* Parse an HTTP token
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*
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* \param input Pointer to current input byte. Updated on exit.
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* \param value Pointer to location to receive on-heap token value.
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* \return NSERROR_OK on success,
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* NSERROR_NOMEM on memory exhaustion,
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* NSERROR_NOT_FOUND if no token could be parsed
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*
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* The returned value is owned by the caller
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*/
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nserror http__parse_token(const char **input, lwc_string **value)
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{
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const uint8_t *start = (const uint8_t *) *input;
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const uint8_t *end;
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lwc_string *token;
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end = start;
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while (http_is_token_char(*end))
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end++;
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if (end == start)
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return NSERROR_NOT_FOUND;
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if (lwc_intern_string((const char *) start,
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end - start, &token) != lwc_error_ok)
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return NSERROR_NOMEM;
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*value = token;
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*input = (const char *) end;
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return NSERROR_OK;
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}
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/**
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* Parse an HTTP quoted-string
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*
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* \param input Pointer to current input byte. Updated on exit.
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* \param value Pointer to location to receive on-heap string value.
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* \return NSERROR_OK on success,
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* NSERROR_NOMEM on memory exhaustion,
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* NSERROR_NOT_FOUND if no string could be parsed
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*
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* The returned value is owned by the caller
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*/
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nserror http__parse_quoted_string(const char **input, lwc_string **value)
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{
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const uint8_t *start = (const uint8_t *) *input;
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const uint8_t *end;
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uint8_t c;
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lwc_string *string_value;
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/* <"> *( qdtext | quoted-pair ) <">
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* qdtext = any TEXT except <">
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* quoted-pair = "\" CHAR
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* TEXT = [ HT, CR, LF, 32-126, 128-255 ]
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* CHAR = [ 0 - 127 ]
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*
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* \todo TEXT may contain non 8859-1 chars encoded per RFC 2047
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* \todo Support quoted-pairs
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*/
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if (*start != '"')
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return NSERROR_NOT_FOUND;
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end = start = start + 1;
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c = *end;
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while (c == '\t' || c == '\r' || c == '\n' ||
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c == ' ' || c == '!' ||
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('#' <= c && c <= 126) || c > 127) {
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end++;
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c = *end;
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}
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if (*end != '"')
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return NSERROR_NOT_FOUND;
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if (lwc_intern_string((const char *) start, end - start,
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&string_value) != lwc_error_ok)
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return NSERROR_NOMEM;
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*value = string_value;
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*input = (const char *) end + 1;
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return NSERROR_OK;
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}
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