replaced php with python version of shipping app

src/02-shipping/docroot/plainHttpService.php

@@ -1,11 +0,0 @@
-<?php
-    //  shipping.php contains our get_shipping_options($zipcode, $pounds) function.
-    //  It returns an array mapping service name to price in US dollars.
-    require ('shipping.php');
-
-    $options = get_shipping_options($_REQUEST[zipcode], $_REQUEST[pounds]);
-    foreach ($options as $service => $price) {
-        $result[] = "$service: $price USD";
-    }
-    print implode("\n", $result);
-?>

src/02-shipping/docroot/shipping.php

@@ -1,12 +0,0 @@
-<?php
-
-    //  Returns an array of made-up shipping options.
-    function get_shipping_options($zipcode, $pounds) {
-        $baseCost = round($zipcode / 10000) + ($pounds * 5);
-        $options = array( "Next Day" => $baseCost * 4,
-                            "Two Day Air" => $baseCost * 2,
-                            "Saver Ground" => $baseCost);
-        return $options;
-    }
-
-?>

src/02-shipping/docroot/xmlHttpService.php

@@ -1,15 +0,0 @@
-<?php
-
-    //  shipping.php contains our get_shipping_options($zipcode, $pounds) function.
-    //  It returns an array mapping service name to price in US dollars.
-    require('shipping.php');
-
-    $options = get_shipping_options($_REQUEST["zipcode"], $_REQUEST["pounds"]);
-
-    $results[] = "<options>";
-    foreach ($options as $service => $price) {
-        $results[] = "<option><service>$service</service><price>$price</price></option>";
-    }
-    $results[] = "</options>";
-    print implode("\n", $results);
-?>

src/02-shipping/shipping.py

@@ -1,32 +1,94 @@
 from __future__ import print_function
 
 import sys
+import cgi
 from wsgiref.simple_server import make_server
 
 
 def main(sysargs=sys.argv[:]):
-    app = ShippingApp()
     port = 18080
-    server = make_server('0.0.0.0', port, app)
-    print('serving {0.__class__.__name__} on port {1}'.format(app, port))
+    server = make_server('0.0.0.0', port, shipping_app)
+    print('serving {0.__name__} on port {1}'.format(shipping_app, port))
     server.serve_forever()
     return 0
 
 
-class ShippingApp(object):
+def shipping_app(environ, start_response):
+    path_info = environ.get('PATH_INFO', '').strip('/')
 
-    def __call__(self, environ, start_response):
-        start_response('200 OK', [('content-type', 'text/plain')])
-        return ['oker doke']
+    handler = {
+        'text': plaintext_handler,
+        'xml': xml_handler,
+    }.get(path_info)
 
-    @classmethod
-    def get_shipping_options(cls, zipcode, pounds):
-        base_cost = (float(zipcode) / 10000.0) + (pounds * 5.0)
-        return {
-            "Next Day": int(base_cost * 4),
-            "Two Day Air": int(base_cost * 2),
-            "Saver Ground": int(base_cost)
-        }
+    if handler:
+        try:
+            return handler(environ, start_response)
+        except Exception:
+            start_response('500 Internal Server Error', [
+                ('content-type', 'text/plain'),
+            ])
+            return ['OUCH']
+    else:
+        ret = 'nothin at {0!r}'.format(path_info)
+        start_response('404 Not Found', [
+            ('content-type', 'text/plain'),
+            ('content-length', str(len(ret)))
+        ])
+        return [ret]
+
+
+def get_params(environ):
+    params = cgi.parse(fp=environ.get('wsgi.input'), environ=environ)
+    for key, value in params.iteritems():
+        if len(value) == 1:
+            params[key] = value[0]
+    return params
+
+
+def xml_handler(environ, start_response):
+    params = get_params(environ)
+    zipcode = int(params.get('zipcode', 0))
+    pounds = int(params.get('pounds', 0))
+
+    ret = ['<options>']
+    for service, price in get_shipping_options(zipcode, pounds).iteritems():
+        ret.append('<option><service>{service}</service>'
+                   '<price>{price}</price></option>'.format(**locals()))
+    ret.append('</options>')
+    body = '\n'.join(ret)
+
+    start_response('200 OK', [
+        ('content-type', 'text/xml'),
+        ('content-length', str(len(body)))
+    ])
+    return [body]
+
+
+def plaintext_handler(environ, start_response):
+    params = get_params(environ)
+    zipcode = int(params.get('zipcode', 0))
+    pounds = int(params.get('pounds', 0))
+
+    ret = []
+    for service, price in get_shipping_options(zipcode, pounds).iteritems():
+        ret.append('{service}: {price} USD'.format(**locals()))
+    body = '\n'.join(ret)
+
+    start_response('200 OK', [
+        ('content-type', 'text/plain'),
+        ('content-length', str(len(body)))
+    ])
+    return [body]
+
+
+def get_shipping_options(zipcode, pounds):
+    base_cost = (float(zipcode) / 10000.0) + (pounds * 5.0)
+    return {
+        "Next Day": int(base_cost * 4),
+        "Two Day Air": int(base_cost * 2),
+        "Saver Ground": int(base_cost)
+    }
 
 
 if __name__ == '__main__':