# HG changeset patch
# User Tero Marttila <terom@fixme.fi>
# Date 1264441585 -7200
# Node ID a5e431cfcc4bd6a496c91e534086fe27da0dfbe2
# Parent  581cdb831b327252d8b7855e84e67b3c98193c53
a simple Tornado frontend that uses the werkzeug handlers

diff -r 581cdb831b32 -r a5e431cfcc4b bin/tornado-server
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bin/tornado-server	Mon Jan 25 19:46:25 2010 +0200
@@ -0,0 +1,9 @@
+#!/usr/bin/python
+"""
+    Script for running the Tornado server + handler
+"""
+
+from pngtile import tornado_handler
+
+tornado_handler.main()
+
diff -r 581cdb831b32 -r a5e431cfcc4b pngtile/tornado_handler.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pngtile/tornado_handler.py	Mon Jan 25 19:46:25 2010 +0200
@@ -0,0 +1,108 @@
+"""
+    A tornado-based HTTP app
+"""
+
+import tornado.web
+import tornado.httpserver
+import tornado.wsgi
+import werkzeug
+
+from pngtile import handlers
+
+class MainHandler (tornado.web.RequestHandler) :
+    """
+        Main handler for the / URL, pass off requests to werkzeug-based handlers...
+    """
+
+    def build_environ (self, path) :
+        """
+            Yield a series of (key, value) pairs suitable for use with WSGI
+        """
+
+        request = self.request
+
+        hostport = request.host.split(":")
+
+        if len(hostport) == 2:
+            host = hostport[0]
+            port = int(hostport[1])
+        else:
+            host = request.host
+            port = 443 if request.protocol == "https" else 80
+
+        yield "REQUEST_METHOD", request.method
+        yield "SCRIPT_NAME", ""
+        yield "PATH_INFO", path
+        yield "QUERY_STRING", request.query
+        yield "SERVER_NAME", host
+        yield "SERVER_PORT", port
+
+        yield "wsgi.version", (1, 0)
+        yield "wsgi.url_scheme", request.protocol
+        
+        yield "CONTENT_TYPE", request.headers.get("Content-Type")
+        yield "CONTENT_LENGTH", request.headers.get("Content-Length")
+
+        for key, value in request.headers.iteritems():
+            yield "HTTP_" + key.replace("-", "_").upper(), value
+    
+    def get (self, path) :
+        environ = dict(self.build_environ(path))
+
+        # build Request
+        request = werkzeug.Request(environ)
+
+        # handle
+        try :
+            response = handlers.handle_req(request)
+
+        except werkzeug.exceptions.HTTPException, ex :
+            response = ex
+
+        # return
+        def start_response (_status, _headers) :
+            status = int(_status.split()[0])
+            headers = _headers
+
+            self.set_status(status)
+
+            for name, value in headers :
+                self.set_header(name, value)
+        
+        # invoke Response
+        data = response(environ, start_response)
+
+        # output data
+        for chunk in data :
+            self.write(chunk)
+        
+def build_app () :
+    return tornado.web.Application([
+        # static, from $CWD/static/
+        (r"/static/(.*)",           tornado.web.StaticFileHandler,  dict(path = "static/")),
+        
+        # dir listings, image html, PNG tiles
+        (r"(/.*)",     MainHandler),
+    ])  
+
+def build_httpserver (app, port) :
+    server = tornado.httpserver.HTTPServer(app)
+    server.listen(port)
+
+    return server
+
+def main (port=8000) :
+    """
+        Build the app, http server and run the main loop
+    """
+
+    import logging
+
+    logging.basicConfig(level=logging.DEBUG)
+
+    app = build_app()
+    server = build_httpserver(app, port)
+
+    tornado.ioloop.IOLoop.instance().start()
+
+