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/****************************************************************************
* netutils/netlib/netlib_parsehttpurl.c
*
* Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
*****************************************************************************/
/****************************************************************************
* Included Files
*****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <apps/netutils/netlib.h>
/****************************************************************************
* Private Data
*****************************************************************************/
const char g_http[] = "http://";
#define HTTPLEN 7
/****************************************************************************
* Public Functions
*****************************************************************************/
/****************************************************************************
* Name: netlib_parsehttpurl
****************************************************************************/
int netlib_parsehttpurl(const char *url, uint16_t *port,
char *hostname, int hostlen,
char *filename, int namelen)
{
const char *src = url;
char *dest;
int bytesleft;
int ret = OK;
/* A valid HTTP URL must begin with http:// if it does not, we will assume
* that it is a file name only, but still return an error. wget() depends
* on this strange behavior.
*/
if (strncmp(src, g_http, HTTPLEN) != 0)
{
ret = -EINVAL;
}
else
{
/* Skip over the http:// */
src += HTTPLEN;
/* Concatenate the hostname following http:// and up to the termnator */
dest = hostname;
bytesleft = hostlen;
while (*src != '\0' && *src != '/' && *src != ' ' && *src != ':')
{
/* Make sure that there is space for another character in the hostname.
* (reserving space for the null terminator)
*/
if (bytesleft > 1)
{
*dest++ = *src++;
bytesleft--;
}
else
{
ret = -E2BIG;
}
}
*dest = '\0';
/* Check if the hostname is following by a port number */
if (*src == ':')
{
uint16_t accum = 0;
src++; /* Skip over the colon */
while (*src >= '0' && *src <= '9')
{
accum = 10*accum + *src - '0';
src++;
}
*port = accum;
}
}
/* The rest of the line is the file name */
if (*src == '\0' || *src == ' ')
{
ret = -ENOENT;
}
/* Make sure the file name starts with exactly one '/' */
dest = filename;
bytesleft = namelen;
while (*src == '/')
{
src++;
}
*dest++ = '/';
bytesleft--;
/* The copy the rest of the file name to the user buffer */
strncpy(dest, src, namelen);
filename[namelen-1] = '\0';
return ret;
}
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