source: mainline/uspace/lib/http/response.c@ 3ce68b7

/*
 * 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"

int http_parse_status(const char *line, http_version_t *out_version,
    uint16_t *out_status, char **out_message)
{
        http_version_t version;
        uint16_t status;
        char *message = NULL;
        
        if (!str_test_prefix(line, "HTTP/"))
                return EINVAL;
        
        const char *pos_version = line + 5;
        const char *pos = pos_version;
        
        int rc = str_uint8_t(pos_version, &pos, 10, false, &version.major);
        if (rc != EOK)
                return rc;
        if (*pos != '.')
                return EINVAL;
        pos++;
        
        pos_version = pos;
        rc = str_uint8_t(pos_version, &pos, 10, false, &version.minor);
        if (rc != EOK)
                return rc;
        if (*pos != ' ')
                return EINVAL;
        pos++;
        
        const char *pos_status = pos;
        rc = str_uint16_t(pos_status, &pos, 10, false, &status);
        if (rc != EOK)
                return rc;
        if (*pos != ' ')
                return EINVAL;
        pos++;
        
        if (out_message) {
                message = str_dup(pos);
                if (message == NULL)
                        return ENOMEM;
        }
        
        if (out_version)
                *out_version = version;
        if (out_status)
                *out_status = status;
        if (out_message)
                *out_message = message;
        return EOK;
}

int http_receive_response(http_t *http, http_response_t **out_response)
{
        http_response_t *resp = malloc(sizeof(http_response_t));
        if (resp == NULL)
                return ENOMEM;
        memset(resp, 0, sizeof(http_response_t));
        list_initialize(&resp->headers);
        
        char *line = malloc(http->buffer_size);
        if (line == NULL) {
                free(resp);
                return ENOMEM;
        }
        
        int rc = recv_line(&http->recv_buffer, line, http->buffer_size);
        if (rc < 0)
                goto error;
        
        rc = http_parse_status(line, &resp->version, &resp->status,
            &resp->message);
        if (rc != EOK)
                goto error;
        
        while (true) {
                rc = recv_eol(&http->recv_buffer);
                if (rc < 0)
                        goto error;
                
                /* Empty line ends header part */
                if (rc > 0)
                        break;
                
                http_header_t *header = malloc(sizeof(http_header_t));
                if (header == NULL) {
                        rc = ENOMEM;
                        goto error;
                }
                http_header_init(header);
                
                rc = http_header_receive(&http->recv_buffer, header);
                if (rc != EOK) {
                        free(header);
                        goto error;
                }
                
                list_append(&header->link, &resp->headers);
        }
        
        *out_response = resp;
        
        return EOK;
error:
        free(line);
        http_response_destroy(resp);
        return rc;
}

int http_receive_body(http_t *http, void *buf, size_t buf_size)
{
        return recv_buffer(&http->recv_buffer, buf, buf_size);
}

void http_response_destroy(http_response_t *resp)
{
        free(resp->message);
        link_t *link = resp->headers.head.next;
        while (link != &resp->headers.head) {
                link_t *next = link->next;
                http_header_t *header = list_get_instance(link, http_header_t, link);
                http_header_destroy(header);
                link = next;
        }
        free(resp);
}

/** @}
 */