Diff: cnn_news.cpp

Revision:

0:27f6f27aef35

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cnn_news.cpp	Tue Jun 05 01:08:29 2012 +0000
@@ -0,0 +1,129 @@
+
+#include "mbed.h"
+#include "EthernetNetIf.h"
+#include "HTTPClient.h"
+#include "NokiaLCD.h"
+
+NokiaLCD lcd(p5, p7, p8, p9, NokiaLCD::LCD6610); // mosi, sclk, cs, rst, type
+
+EthernetNetIf eth; 
+HTTPClient http;
+LocalFileSystem local("local"); 
+HTTPResult result;
+bool completed = false;
+
+void request_callback(HTTPResult r)
+{
+  result = r;
+  completed = true;
+}
+
+int main() {
+
+   lcd.background(0x0000FF);
+    lcd.cls();
+
+  printf("Start\n");
+
+  printf("Setting up...\n");
+  EthernetErr ethErr = eth.setup();
+  if(ethErr)
+  {
+    printf("Error %d in setup.\n", ethErr);
+    return -1;
+  }
+  printf("Setup OK\n");
+  
+  HTTPStream stream;
+  
+  int flag = 0;
+  int count = 0;
+  int pixel = 1;
+  char c;
+  char buffer[100];
+  char BigBuf[512 + 1] = {0};
+  stream.readNext((byte*)BigBuf, 512); //Point to buffer for the first read
+  
+  HTTPResult r = http.get("http://rss.cnn.com/rss/cnn_topstories.rss", &stream, request_callback); //Load a very large page, such as the hackaday RSS feed
+  FILE *fp = fopen("/local/out.txt", "w");  // Open "out.txt" on the local file system for writing
+  while(!completed)
+  {
+    Net::poll(); //Polls the Networking stack
+    if(stream.readable())
+    {
+      BigBuf[stream.readLen()] = 0; //Transform this buffer in a zero-terminated char* string
+      fprintf(fp,BigBuf);
+      //Note: some servers do not like if you throttle them too much, so printf'ing during a request is generally bad practice
+      stream.readNext((byte*)BigBuf, 512); //Buffer has been read, now we can put more data in it
+    }
+  }
+  fclose(fp); 
+  fp = fopen( "/local/out.txt", "r");
+  if (fp==NULL) printf ("Error opening file");
+  else
+  {
+    do
+    {
+      c = fgetc (fp);
+      if (c == '<')
+      {
+        c = fgetc(fp);
+        if(c == 't')
+        {
+          c = fgetc(fp);
+          if(c == 'i')
+          {
+            c = fgetc(fp);
+            if(c == 't')
+            {
+              c = fgetc(fp);
+              if( c == 'l')
+              {
+                c = fgetc(fp);
+                if( c == 'e')
+                {
+                  c = fgetc(fp);
+                  if(c == '>')
+                  {
+                    count++;
+                    if((count >=3) && (count <=5))
+                    {
+                    if(count == 6) break;
+                    int i = 0;
+                    c = fgetc(fp);
+                    while(c != '<')
+                    {
+                        buffer[i] = c;
+                        i++;
+                        c = fgetc(fp);
+                    }
+                    buffer[i] = '\0';
+                    lcd.locate(0,pixel);
+                    lcd.printf("%s",buffer);
+                    pixel += 5;
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }while (count <= 5);
+    fclose (fp);
+  } 
+
+  if(result == HTTP_OK)
+  {
+    printf("Read completely\n"); 
+  }
+  else
+  {
+    printf("Error %d\n", result);
+  }
+
+  return 0;
+  
+}
+
+