Make HTTP URL parsing common

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1652 42af7a65-404d-4744-a932-0658087f49c3

include/net/uip/uip-lib.h

@@ -1,11 +1,14 @@
 /****************************************************************************
  * net/uip/uiplib.h
- * Various uIP library functions.
+ * Various non-standard APIs to support netutils.  All non-standard and
+ * intended only for internal use.
  *
- *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
- * Based on uIP which also has a BSD style license:
+ * Some of these APIs derive from uIP but all of them use the uip_ prefix
+ * to identify them as members of this library.  uIP also has a BSD style
+ * license:
  *
  *   Author: Adam Dunkels <adam@sics.se>
  *   Copyright (c) 2002, Adam Dunkels.
@@ -39,8 +42,8 @@
  *
  ****************************************************************************/
 
-#ifndef __UIPLIB_H__
-#define __UIPLIB_H__
+#ifndef __NET_UIP_UIP_LIB_H
+#define __NET_UIP_UIP_LIB_H
 
 /****************************************************************************
  * Included Files
@@ -105,8 +108,14 @@ extern int uip_setdraddr(const char *ifname, const struct in_addr *addr);
 extern int uip_setnetmask(const char *ifname, const struct in_addr *addr);
 #endif
 
+/* HTTP support */
+
+extern int  uip_parsehttpurl(const char *url, uint16 *port,
+                             char *hostname, int hostlen,
+                             char *filename, int namelen);
+
 /* Generic server logic */
 
 extern void uip_server(uint16 portno, pthread_startroutine_t handler, int stacksize);
 
-#endif /* __UIPLIB_H__ */
+#endif /* __NET_UIP_UIP_LIB_H */

netutils/uiplib/Make.defs

@@ -35,4 +35,5 @@
 
 UIPLIB_ASRCS =
 UIPLIB_CSRCS = uiplib.c uip_setmacaddr.c uip_getmacaddr.c uip_sethostaddr.c \
-	uip_gethostaddr.c uip_setdraddr.c uip_setnetmask.c uip_server.c
+	uip_gethostaddr.c uip_setdraddr.c uip_setnetmask.c uip_parsehttpurl.c \
+	uip_server.c

netutils/uiplib/uip_parsehttpurl.c

@@ -0,0 +1,146 @@
+/****************************************************************************
+ * netutils/uiplib/uip_parsehttpurl.c
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <sys/types.h>
+#include <string.h>
+#include <errno.h>
+#include <net/uip/uip-lib.h>
+
+/****************************************************************************
+ * Private Data
+ *****************************************************************************/
+
+const char g_http[] = "http://";
+#define HTTPLEN 7
+
+/****************************************************************************
+ * Public Functions
+ *****************************************************************************/
+
+/****************************************************************************
+ * Name: uip_parsehttpurl
+ ****************************************************************************/
+
+int uip_parsehttpurl(const char *url, uint16 *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 accum = 0;
+          src++;
+          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;
+}
+