1 files changed, 117 insertions, 0 deletions
diff --git a/Webduino/examples/Web_Image/Web_Image.ino b/Webduino/examples/Web_Image/Web_Image.ino
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index 0000000..cafb149
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+++ b/Webduino/examples/Web_Image/Web_Image.ino
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+/* Web_Image.pde - example sketch for Webduino library */
+/* For webduino version 1.2 */
+
+/* DISCLAIMER -- the Webduino server can only handle one web connection
+ * at a time.  Because of this, loading the root page on this sketch may
+ * not correctly show the LED icon if the browser starts requesting that
+ * picture before the page has finished loading.
+ *
+ * This problem should be reduced greatly once the Ethernet library
+ * has been modified to do proper packet buffering.  With the library
+ * in Arduino 15, each character is sent in its own TCP/IP packet.
+ * This is very inefficient and means that it takes much longer to
+ * send a web page than it should.  When this bug is fixed, the web
+ * server will have sent its last data and closed the connection by
+ * the time the client reads the HTML, so it's ready to handle the
+ * image request.
+ */
+
+#include "SPI.h"
+#include "Ethernet.h"
+#include "WebServer.h"
+
+// CHANGE THIS TO YOUR OWN UNIQUE VALUE
+static uint8_t mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
+static uint8_t ip[] = { 192, 168, 1, 210 };
+
+WebServer webserver("", 80);
+
+/* The default page just returns HTML to show the image */
+void defaultCmd(WebServer &server, WebServer::ConnectionType type, char *url_tail, bool tail_complete)
+{
+  if (type == WebServer::POST)
+  {
+    // ignore POST data
+    server.httpFail();
+    return;
+  }
+
+  /* for a GET or HEAD, send the standard "it's all OK headers" */
+  server.httpSuccess();
+
+  /* we don't output the body for a HEAD request */
+  if (type == WebServer::GET)
+  {
+    /* store the HTML in program memory using the P macro */
+    P(message) = 
+      "<html><head><title>Webduino Image Example</title>"
+      "<body>"
+      "<h2>LED Image</h2>"
+      "<img src='led.png' width=256 height=256>"
+      "</body></html>";
+
+    server.printP(message);
+  }
+}
+
+void imageCmd(WebServer &server, WebServer::ConnectionType type, char *url_tail, bool tail_complete)
+{
+  /* this data was taken from a PNG file that was converted to a C data structure
+   * by running it through the directfb-csource application. */
+  P(ledData) = {
+    0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d, 0x49, 0x48, 0x44, 0x52,
+    0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x10, 0x08, 0x02, 0x00, 0x00, 0x00, 0x90, 0x91, 0x68,
+    0x36, 0x00, 0x00, 0x00, 0x01, 0x73, 0x52, 0x47, 0x42, 0x00, 0xae, 0xce, 0x1c, 0xe9, 0x00, 0x00,
+    0x00, 0x04, 0x67, 0x41, 0x4d, 0x41, 0x00, 0x00, 0xb1, 0x8f, 0x0b, 0xfc, 0x61, 0x05, 0x00, 0x00,
+    0x00, 0x20, 0x63, 0x48, 0x52, 0x4d, 0x00, 0x00, 0x7a, 0x26, 0x00, 0x00, 0x80, 0x84, 0x00, 0x00,
+    0xfa, 0x00, 0x00, 0x00, 0x80, 0xe8, 0x00, 0x00, 0x75, 0x30, 0x00, 0x00, 0xea, 0x60, 0x00, 0x00,
+    0x3a, 0x98, 0x00, 0x00, 0x17, 0x70, 0x9c, 0xba, 0x51, 0x3c, 0x00, 0x00, 0x00, 0x18, 0x74, 0x45,
+    0x58, 0x74, 0x53, 0x6f, 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x00, 0x50, 0x61, 0x69, 0x6e, 0x74,
+    0x2e, 0x4e, 0x45, 0x54, 0x20, 0x76, 0x33, 0x2e, 0x33, 0x36, 0xa9, 0xe7, 0xe2, 0x25, 0x00, 0x00,
+    0x00, 0x57, 0x49, 0x44, 0x41, 0x54, 0x38, 0x4f, 0x95, 0x52, 0x5b, 0x0a, 0x00, 0x30, 0x08, 0x6a,
+    0xf7, 0x3f, 0xf4, 0x1e, 0x14, 0x4d, 0x6a, 0x30, 0x8d, 0x7d, 0x0d, 0x45, 0x2d, 0x87, 0xd9, 0x34,
+    0x71, 0x36, 0x41, 0x7a, 0x81, 0x76, 0x95, 0xc2, 0xec, 0x3f, 0xc7, 0x8e, 0x83, 0x72, 0x90, 0x43,
+    0x11, 0x10, 0xc4, 0x12, 0x50, 0xb6, 0xc7, 0xab, 0x96, 0xd0, 0xdb, 0x5b, 0x41, 0x5c, 0x6a, 0x0b,
+    0xfd, 0x57, 0x28, 0x5b, 0xc2, 0xfd, 0xb2, 0xa1, 0x33, 0x28, 0x45, 0xd0, 0xee, 0x20, 0x5c, 0x9a,
+    0xaf, 0x93, 0xd6, 0xbc, 0xdb, 0x25, 0x56, 0x61, 0x01, 0x17, 0x12, 0xae, 0x53, 0x3e, 0x66, 0x32,
+    0xba, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82
+  };
+
+  if (type == WebServer::POST)
+  {
+    // ignore POST data
+    server.httpFail();
+    return;
+  }
+
+  /* for a GET or HEAD, send the standard "it's all OK headers" but identify our data as a PNG file */
+  server.httpSuccess("image/png");
+
+  /* we don't output the body for a HEAD request */
+  if (type == WebServer::GET)
+  {
+    server.writeP(ledData, sizeof(ledData));
+  }
+}
+
+void setup()
+{
+  // setup the Ehternet library to talk to the Wiznet board
+  Ethernet.begin(mac, ip);
+
+  /* register our default command (activated with the request of
+   * http://x.x.x.x/ */
+  webserver.setDefaultCommand(&defaultCmd);
+
+  /* register our image output command */
+  webserver.addCommand("led.png", &imageCmd);
+
+  /* start the server to wait for connections */
+  webserver.begin();
+}
+
+void loop()
+{
+  // process incoming connections one at a time forever
+  webserver.processConnection();
+}