jim hamblen / Mbed OS 4180TCPSocket_Example

Alternative TCPSocket example using an HTTP GET to read a short "helloworld" text web page using a different server

Fork of ARMs demo HTTP socket demo. ARM's server was redirected and the demo was no longer working. An alternative server was setup and the code was modified to display the web page text in addition to just "200 OK". Only works for a very short web page - buffer only 500 characters but RAM is running out on the LPC1768 in the demo!

Files at this revision

API Documentation at this revision

Revision 3:576f312d2601, committed 2021-02-04

Comitter:
4180_1
Date:
Thu Feb 04 20:17:42 2021 +0000
Parent:
2:50f1485931f1
Commit message:
ver 1.0

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r 50f1485931f1 -r 576f312d2601 main.cpp
--- a/main.cpp	Fri Jun 23 14:13:09 2017 -0500
+++ b/main.cpp	Thu Feb 04 20:17:42 2021 +0000
@@ -7,27 +7,28 @@
 // Socket demo
 int main() {
     // Bring up the ethernet interface
-    printf("Ethernet socket example\n");
+    printf("\n\rEthernet socket example\n\r");
     net.connect();
 
     // Show the network address
     const char *ip = net.get_ip_address();
-    printf("IP address is: %s\n", ip ? ip : "No IP");
+    printf("IP address is: %s\n\r", ip ? ip : "No IP");
 
     // Open a socket on the network interface, and create a TCP connection to mbed.org
     TCPSocket socket;
     socket.open(&net);
-    socket.connect("www.arm.com", 80);
+    socket.connect("hamblen.ece.gatech.edu", 80);
 
     // Send a simple http request
-    char sbuffer[] = "GET / HTTP/1.1\r\nHost: www.arm.com\r\n\r\n";
+    char sbuffer[] = "GET /hello.txt HTTP/1.1\r\nHost: hamblen.ece.gatech.edu\r\n\r\n";
     int scount = socket.send(sbuffer, sizeof sbuffer);
+    //print out packet
     printf("sent %d [%.*s]\n", scount, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
 
-    // Recieve a simple http response and print out the response line
-    char rbuffer[64];
+    // Recieve a simple http response and print out the response line and text
+    char rbuffer[400]; //enough for a very short text page - almost out of RAM!
     int rcount = socket.recv(rbuffer, sizeof rbuffer);
-    printf("recv %d [%.*s]\n", rcount, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
+    printf("recv %d [%.*s]\n\r", rcount, strstr(rbuffer, "\r\n"), rbuffer);
 
     // Close the socket to return its memory and bring down the network interface
     socket.close();