161 lines
4.8 KiB
C
161 lines
4.8 KiB
C
/****************************************************************************
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* netutils/netlib/netlib_parsehttpurl.c
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*
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* Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include "netutils/netlib.h"
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const char g_http[] = "http://";
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#define HTTPLEN 7
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: netlib_parsehttpurl
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****************************************************************************/
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int netlib_parsehttpurl(FAR const char *url, FAR uint16_t *port,
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FAR char *hostname, int hostlen,
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FAR char *filename, int namelen)
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{
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FAR const char *src = url;
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FAR char *dest;
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int bytesleft;
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int ret = OK;
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/* A valid HTTP URL must begin with http:// if it does not, we will assume
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* that it is a file name only, but still return an error. wget() depends
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* on this strange behavior.
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*/
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if (strncmp(src, g_http, HTTPLEN) != 0)
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{
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ret = -EINVAL;
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}
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else
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{
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/* Skip over the http:// */
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src += HTTPLEN;
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/* Concatenate the hostname following http:// and up to the termnator */
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dest = hostname;
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bytesleft = hostlen;
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while (*src != '\0' && *src != '/' && *src != ' ' && *src != ':')
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{
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/* Make sure that there is space for another character in the
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* hostname (reserving space for the null terminator).
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*/
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if (bytesleft > 1)
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{
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/* Copy the byte */
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*dest++ = *src++;
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bytesleft--;
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}
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else
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{
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/* Note the error, but continue parsing until the end of the
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* hostname
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*/
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src++;
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ret = -E2BIG;
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}
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}
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*dest = '\0';
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/* Check if the hostname is following by a port number */
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if (*src == ':')
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{
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uint16_t accum = 0;
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src++; /* Skip over the colon */
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while (*src >= '0' && *src <= '9')
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{
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accum = 10*accum + *src - '0';
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src++;
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}
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*port = accum;
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}
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}
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/* The rest of the line is the file name */
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if (*src == '\0' || *src == ' ')
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{
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ret = -ENOENT;
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}
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/* Make sure the file name starts with exactly one '/' */
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dest = filename;
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bytesleft = namelen;
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while (*src == '/')
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{
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src++;
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}
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*dest++ = '/';
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bytesleft--;
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/* The copy the rest of the file name to the user buffer */
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strncpy(dest, src, namelen);
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filename[namelen-1] = '\0';
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return ret;
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}
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