Initial.

.gitignore

+*~

listen.py

+import SimpleHTTPServer
+import SocketServer
+import socket
+import os
+import sys
+from ev3.lego import MediumMotor
+
+if len(sys.argv) != 2:
+    print>>sys.stderr,'Syntax: %s <port>' % (sys.argv[0])
+    sys.exit(1)
+
+class Handler(SimpleHTTPServer.SimpleHTTPRequestHandler):
+    def do_GET(self): 
+        parts = self.path[1:].split('/')
+        print parts
+        if len(parts) == 4 and parts[0] == 'motor':
+            print 'Run %s to %s at speed %s' % (parts[1], parts[2], parts[3])
+            d = MediumMotor(parts[1])
+	    d.run_position_limited(int(parts[2]), int(parts[3]), absolute=False) 
+
+        self.send_response(200)
+        self.send_header('Content-Type', 'text/html')
+        self.end_headers()
+        self.wfile.write('OK')
+        self.wfile.close()
+
+class TCPServer(SocketServer.TCPServer):
+    def server_bind(self):
+        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        self.socket.bind(self.server_address)
+
+httpd = TCPServer(("", int(sys.argv[1])), Handler)
+print 'EV3 ready.'
+httpd.serve_forever()

snap-ev3.py

+import SimpleHTTPServer
+import SocketServer
+import socket
+import os
+import urllib2
+
+# Port to listen to Snap on
+SNAP_PORT = 1330
+# Port for EV3 to listen on
+EV3_PORT = 8192
+# EV3 user ID and IP address
+EV3_CONNECTION = 'root@10.42.0.51'
+
+class Handler(SimpleHTTPServer.SimpleHTTPRequestHandler):
+    def send_head(self):
+	if self.path == '/snap-ev3':
+            f = open('snap-ev3.xml', 'rb')
+            self.send_response(200)
+            self.send_header("Content-type", 'text/xml')
+            fs = os.fstat(f.fileno())
+            self.send_header("Content-Length", str(fs[6]))
+            self.send_header("Last-Modified", self.date_time_string(fs.st_mtime))
+            self.send_header("Access-Control-Allow-Origin", "*")
+            self.end_headers()
+            return f
+        else:
+            SimpleHTTPServer.SimpleHTTPRequestHandler.send_head(self)
+            urllib2.urlopen("http://10.42.0.51:%d%s" % (EV3_PORT, self.path), timeout=5).read()
+        
+class TCPServer(SocketServer.TCPServer):
+    def server_bind(self):
+        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        self.socket.bind(self.server_address)
+
+print "Starting listener on EV3"
+os.system('scp listen.py %s:' % EV3_CONNECTION)
+os.system('ssh %s -- nohup python listen.py %d &' % (EV3_CONNECTION, EV3_PORT))
+
+httpd = TCPServer(("", SNAP_PORT), Handler)
+print "http://snap.berkeley.edu/snapsource/snap.html#open:http://localhost:1330/snap-ev3"
+httpd.serve_forever()

snap-ev3.xml

+<blocks app="Snap! 4.0, http://snap.berkeley.edu" version="1">
+  <block-definition category="control" s="move motor %&apos;motor&apos; %&apos;degrees&apos; degrees at %&apos;speed&apos; speed" type="command">
+    <inputs>
+      <input type="%txt">a</input>
+      <input type="%n">360</input>
+      <input type="%n">100</input>
+    </inputs>
+    <script>
+      <block s="doRun">
+	<block s="reifyReporter">
+	  <autolambda>
+	    <block s="reportURL">
+	      <block s="reportJoinWords">
+		<list>
+		  <l>localhost:1330/motor/</l>
+		  <block var="motor"/>
+		  <l>/</l>
+		  <block var="degrees"/>
+		  <l>/</l>
+		  <block var="speed"/>
+		</list>
+	      </block>
+	    </block>
+	  </autolambda>
+	</block>
+      </block>
+    </script>
+  </block-definition>
+</blocks>