Diff: modules/pico_http_util.c

Revision:

2:540f6e142d59

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/pico_http_util.c	Sat Aug 03 13:16:14 2013 +0000
@@ -0,0 +1,186 @@
+/*********************************************************************
+PicoTCP. Copyright (c) 2012 TASS Belgium NV. Some rights reserved.
+See LICENSE and COPYING for usage.
+
+Author: Andrei Carp <andrei.carp@tass.be>
+*********************************************************************/
+
+#include <stdint.h>
+#include "pico_config.h"
+#include "pico_stack.h"
+#include "pico_protocol.h"
+#include "pico_http_util.h"
+
+#define TRUE    1
+#define FALSE 0
+
+#define HTTP_PROTO_TOK        "http://"
+#define HTTP_PROTO_LEN        7u
+
+#if defined PICO_SUPPORT_HTTP_CLIENT || defined PICO_SUPPORT_HTTP_SERVER
+
+int pico_itoaHex(uint16_t port, char * ptr)
+{
+    int size = 0;
+    int index;
+
+    // transform to from number to string [ in backwards ]
+    while(port)
+    {
+        ptr[size] = ((port & 0xF) < 10) ? ((port & 0xF) + '0') : ((port & 0xF) - 10 + 'a');
+        port = port>>4u; //divide by 16
+        size++;
+    }
+
+    // invert positions
+    for(index=0 ;index < size>>1u ;index++)
+    {
+        char c = ptr[index];
+        ptr[index] = ptr[size-index-1];
+        ptr[size-index-1] = c;
+    }
+    ptr[size] = '\0';
+    return size;
+}
+
+int pico_itoa(uint16_t port, char * ptr)
+{
+    int size = 0;
+    int index;
+
+    // transform to from number to string [ in backwards ]
+    while(port)
+    {
+        ptr[size] = port%10 + '0';
+        port = port/10;
+        size++;
+    }
+
+    // invert positions
+    for(index=0 ;index < size>>1u ;index++)
+    {
+        char c = ptr[index];
+        ptr[index] = ptr[size-index-1];
+        ptr[size-index-1] = c;
+    }
+    ptr[size] = '\0';
+    return size;
+}
+
+
+int pico_processURI(const char * uri, struct pico_http_uri * urikey)
+{
+
+    uint16_t lastIndex = 0, index;
+
+    if(!uri || !urikey || uri[0] == '/')
+    {
+        pico_err = PICO_ERR_EINVAL;
+        goto error;
+    }
+
+    // detect protocol => search for  "://"
+    if(memcmp(uri,HTTP_PROTO_TOK,HTTP_PROTO_LEN) == 0) // could be optimized
+    { // protocol identified, it is http
+        urikey->protoHttp = TRUE;
+        lastIndex = HTTP_PROTO_LEN;
+    }
+    else
+    {
+        if(strstr(uri,"://")) // different protocol specified
+        {
+            urikey->protoHttp = FALSE;
+            goto error;
+        }
+        // no protocol specified, assuming by default it's http
+        urikey->protoHttp = TRUE;
+    }
+
+    // detect hostname
+    index = lastIndex;
+    while(uri[index] && uri[index]!='/' && uri[index]!=':') index++;
+
+    if(index == lastIndex)
+    {
+        // wrong format
+        urikey->host = urikey->resource = NULL;
+        urikey->port = urikey->protoHttp = 0u;
+
+        goto error;
+    }
+    else
+    {
+        // extract host
+        urikey->host = (char *)pico_zalloc(index-lastIndex+1);
+
+        if(!urikey->host)
+        {
+            // no memory
+            goto error;
+        }
+        memcpy(urikey->host,uri+lastIndex,index-lastIndex);
+    }
+
+    if(!uri[index])
+    {
+        // nothing specified
+        urikey->port = 80u;
+        urikey->resource = pico_zalloc(2u);
+        urikey->resource[0] = '/';
+        return HTTP_RETURN_OK;
+    }
+    else if(uri[index] == '/')
+    {
+        urikey->port = 80u;
+    }
+    else if(uri[index] == ':')
+    {
+        urikey->port = 0u;
+        index++;
+        while(uri[index] && uri[index]!='/')
+        {
+            // should check if every component is a digit
+            urikey->port = urikey->port*10 + (uri[index] - '0');
+            index++;
+        }
+    }
+
+  // extract resource
+    if(!uri[index])
+    {
+        urikey->resource = pico_zalloc(2u);
+        urikey->resource[0] = '/';
+    }
+    else
+    {
+        lastIndex = index;
+        while(uri[index] && uri[index]!='?' && uri[index]!='&' && uri[index]!='#') index++;
+        urikey->resource = (char *)pico_zalloc(index-lastIndex+1);
+
+        if(!urikey->resource)
+        {
+            // no memory
+            pico_err = PICO_ERR_ENOMEM;
+            goto error;
+        }
+
+        memcpy(urikey->resource,uri+lastIndex,index-lastIndex);
+    }
+
+    return HTTP_RETURN_OK;
+
+    error :
+    if(urikey->resource)
+    {
+        pico_free(urikey->resource);
+        urikey->resource = NULL;
+    }
+    if(urikey->host)
+    {
+        pico_free(urikey->host);
+        urikey->host = NULL;
+    }
+
+    return HTTP_RETURN_ERROR;
+}
+#endif