content-type.c

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/*
 * 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#include "utils/http.h"
 
#include "utils/http/generics.h"
#include "utils/http/parameter_internal.h"
#include "utils/http/primitives.h"
 
/* See content-type.h for documentation */
nserror http_parse_content_type(const char *header_value,
                http_content_type **result)
{
        const char *pos = header_value;
        lwc_string *type;
        lwc_string *subtype = NULL;
        http_parameter *params = NULL;
        char *mime;
        size_t mime_len;
        lwc_string *imime;
        http_content_type *ct;
        nserror error;
 
        /* type "/" subtype *( ";" parameter ) */
 
        http__skip_LWS(&pos);
 
        error = http__parse_token(&pos, &type);
        if (error != NSERROR_OK)
                return error;
 
        http__skip_LWS(&pos);
 
        if (*pos != '/') {
                lwc_string_unref(type);
                return NSERROR_NOT_FOUND;
        }
 
        pos++;
 
        http__skip_LWS(&pos);
 
        error = http__parse_token(&pos, &subtype);
        if (error != NSERROR_OK) {
                lwc_string_unref(type);
                return error;
        }
 
        http__skip_LWS(&pos);
 
        if (*pos == ';') {
                error = http__item_list_parse(&pos,
                                http__parse_parameter, NULL, &params);
                if (error != NSERROR_OK && error != NSERROR_NOT_FOUND) {
                        lwc_string_unref(subtype);
                        lwc_string_unref(type);
                        return error;
                }
        }
 
        /* <type> + <subtype> + '/' */
        mime_len = lwc_string_length(type) + lwc_string_length(subtype) + 1;
 
        mime = malloc(mime_len + 1);
        if (mime == NULL) {
                http_parameter_list_destroy(params);
                lwc_string_unref(subtype);
                lwc_string_unref(type);
                return NSERROR_NOMEM;
        }
 
        sprintf(mime, "%.*s/%.*s", 
                (int) lwc_string_length(type), lwc_string_data(type), 
                (int) lwc_string_length(subtype), lwc_string_data(subtype));
 
        lwc_string_unref(subtype);
        lwc_string_unref(type);
 
        if (lwc_intern_string(mime, mime_len, &imime) != lwc_error_ok) {
                http_parameter_list_destroy(params);
                free(mime);
                return NSERROR_NOMEM;
        }
 
        free(mime);
 
        ct = malloc(sizeof(*ct));
        if (ct == NULL) {
                lwc_string_unref(imime);
                http_parameter_list_destroy(params);
                return NSERROR_NOMEM;
        }
 
        ct->media_type = imime;
        ct->parameters = params;
 
        *result = ct;
 
        return NSERROR_OK;
}
 
/* See content-type.h for documentation */
void http_content_type_destroy(http_content_type *victim)
{
        lwc_string_unref(victim->media_type);
        http_parameter_list_destroy(victim->parameters);
        free(victim);
}