source: mainline/uspace/lib/http/headers.c@ c17469e

/*
 * Copyright (c) 2013 Martin Sucha
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup http
 * @{
 */
/**
 * @file
 */

#include <stdio.h>
#include <stdlib.h>
#include <str.h>
#include <macros.h>

#include "http.h"

#define HTTP_HEADER_LINE "%s: %s\r\n"

static char *cut_str(const char *start, const char *end)
{
        size_t size = end - start;
        return str_ndup(start, size);
}

void http_header_init(http_header_t *header)
{
        link_initialize(&header->link);
        header->name = NULL;
        header->value = NULL;
}

http_header_t *http_header_create(const char *name, const char *value)
{
        http_header_t *header = malloc(sizeof(http_header_t));
        if (header == NULL)
                return NULL;
        http_header_init(header);

        header->name = str_dup(name);
        if (header->name == NULL) {
                free(header);
                return NULL;
        }
        
        header->value = str_dup(value);
        if (header->value == NULL) {
                free(header->name);
                free(header);
                return NULL;
        }

        return header;
}

void http_header_destroy(http_header_t *header)
{
        free(header->name);
        free(header->value);
        free(header);
}

ssize_t http_header_encode(http_header_t *header, char *buf, size_t buf_size)
{
        /* TODO properly split long header values */
        if (buf == NULL) {
                return printf_size(HTTP_HEADER_LINE, header->name, header->value);
        }
        else {
                return snprintf(buf, buf_size,
                    HTTP_HEADER_LINE, header->name, header->value);
        }
}

int http_header_parse(const char *line, http_header_t *header)
{
        const char *pos = line;
        while (*pos != 0 && *pos != ':') pos++;
        if (*pos != ':')
                return EINVAL;
        
        char *name = cut_str(line, pos);
        if (name == NULL)
                return ENOMEM;
        
        pos++;
        
        while (*pos == ' ') pos++;
        
        char *value = str_dup(pos);
        if (value == NULL) {
                free(name);
                return ENOMEM;
        }
        
        header->name = name;
        header->value = value;
        
        return EOK;
}

/** @}
 */