PHP: yahoo finance to xml

wrote a simple PHP script to get quotes data from yahoo finance and format it into XML format.

sample: http://psalmhundred.net/experiment/stocks.php?s=adbe,goog,aapl,msft

OR



references:
http://www.gummy-stuff.org/Yahoo-data.htm

Flash: Weather RSS feed

Flash & XML: namespace

sample RSS feed: http://weather.yahooapis.com/forecastrss?w=1062605&u=c

to access elements that are using namespace.
eg.:

 <?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
 <rss version="2.0" xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#">
 <channel>
 ...
 <item>
 ...
  <yweather:condition text="Partly Cloudy" code="30" temp="31" date="Sun, 25 Jul 2010 7:00 pm SGT" />
 ...
  </item>
 ...
  </channel>
  </rss>

gotta use the Namespace class and the :: operator

eg.:

var xml:XML = new XML(loader.data);
var ns:Namespace = xml.namespace("yweather");
trace(xml.channel.item.ns::condition.@text);

Flash Particles effect

Novint Falcon used in Flash

Getting x, y, z coordinates and buttons status:


Using Flash to output force feedback to haptic device:

winsock 2: recv with select

needed to use recv in synchronous mode. but it is a blocking call.
so google a bit and found select.

code segment:

fd_set sockets;
TIMEVAL waitTime;

void Receive()
{
 // gotta call select() to check if there is incoming packet
  sockets.fd_count = 1;
 sockets.fd_array[0] = ClientSocket;

// time to expire for select call. since it is blocking too.
  waitTime.tv_sec = 0; // seconds
 waitTime.tv_usec = 100; // micro seconds

 // check if any of the listening sockets has incoming data
// returns number of sockets in fd_set that has incoming data
 int result = select(NULL, &sockets, NULL, NULL, &waitTime);

 int iResult = result;
 if(result > 0)
 {
  // blocking call
  iResult = recv(ClientSocket, recvbuf, recvbuflen, 0);
  if(iResult > 0)
  {
   printf("Bytes received: %d\n", iResult);
   printf("Recv: %s\n", recvbuf);
  }
  else if(iResult == 0)
  {
   //printf("Nothing received\n");
  }
  else 
  {
   printf("recv failed: %d\n", WSAGetLastError());
  }
 }
 return iResult;
}

libxml2: XML parsing using C/C++

http://www.xmlsoft.org/

require some modification:
xmlversion.h

/**
 * LIBXML_ICONV_ENABLED:
 *
 * Whether iconv support is available
 */
#if 0 // instead of 1
#define LIBXML_ICONV_ENABLED
#endif

iconv.dll required. got it at: http://www.gnupg.org/download/iconv.en.html

xmlTextReaderPtr reader;
 char xml[200] = "<root><child1><child2 attr=\"123\" attr2=\"test\">hello world</child2></child1></root>";
 printf("%s\n", xml);
 cout << "Read XML from memory...\n";
 reader = xmlReaderForMemory(xml, strlen(xml), "", NULL, 0);
 if (reader != NULL) {
  // loop to read nodes
  int ret;
  const xmlChar *name, *value;
  ret = xmlTextReaderRead(reader);
  while(ret == 1)
  {
   name = xmlTextReaderConstName(reader);
   value = xmlTextReaderConstValue(reader);
   printf("%s=%s\n", name, value);

// attributes
   ret = xmlTextReaderHasAttributes(reader);
   if(ret == 1)
   {
    // has attributes
    attrName = xmlCharStrdup("attr");
    attrValue = xmlTextReaderGetAttribute(reader, attrName);
    int attr = atoi((const char *) attrValue);

    printf("attr=%d\n", attr);

   }

   ret = xmlTextReaderRead(reader);
  }
  
  cout << "Freeing XML reader...\n";
        xmlFreeTextReader(reader);

    }