Bug fixes to test-server Python response hook support.

* correctly fake a package to hold all the response-hook modules
* use StringIO correctly in the response hooks
* prevent .py(c) files in test/www/ from being accessed directly
* prevent test/www/__init__ from being treated as a response hook
* add a test case that makes sure the existing hooks _can_ return 200 OK

(issue #12439; buggy commit 4d60e94)

test/basics/test-server.js

@@ -0,0 +1,28 @@
+/* Test the test server itself. */
+
+var assert = require('../assert');
+var webpage = require('webpage');
+var page = webpage.create();
+
+var urlsToTest = [
+    'http://localhost:9180/hello.html',
+    'http://localhost:9180/status?200',
+    'http://localhost:9180/echo'
+];
+var i = 0;
+
+page.onResourceReceived = function (response) {
+    assert.equal(response.status, 200);
+};
+
+page.onLoadFinished = function (status) {
+    assert.equal(status, 'success');
+    i++;
+    if (i == urlsToTest.length) {
+        phantom.exit(0);
+    } else {
+        page.open(urlsToTest[i]);
+    }
+}
+
+page.open(urlsToTest[i]);

test/run-tests.py

@@ -33,8 +33,10 @@ TESTS = [
 # This should be in the standard library somewhere, but as far as I
 # can tell, isn't.
 def import_file_as_module(path):
+    # All Python response hooks, no matter how deep below www_path,
+    # are treated as direct children of the fake "test_www" package.
     if 'test_www' not in sys.modules:
-        imp.load_source('test_www', www_path + '/__init__.py', StringIO())
+        imp.load_source('test_www', www_path + '/__init__.py')
 
     tr = string.maketrans('-./%', '____')
     modname = 'test_www.' + path.translate(tr)
@@ -54,12 +56,23 @@ class FileHandler(SimpleHTTPServer.SimpleHTTPRequestHandler, object):
     def log_message(self, format, *args):
         return
 
-    # modified version allowing one to provide a .py file that will be
-    # interpreted to produce the response
+    # allow provision of a .py file that will be interpreted to
+    # produce the response.
     def send_head(self):
         path = self.translate_path(self.path)
+
+        # do not allow direct references to .py(c) files,
+        # or indirect references to __init__.py
+        if (path.endswith('.py') or path.endswith('.pyc') or
+            path.endswith('__init__')):
+            self.send_error(404, 'File not found')
+            return None
+
+        if os.path.exists(path):
+            return super(FileHandler, self).send_head()
+
         py = path + '.py'
-        if not os.path.exists(path) and os.path.exists(py):
+        if os.path.exists(py):
             try:
                 mod = import_file_as_module(py)
                 return mod.handle_request(self)
@@ -75,8 +88,8 @@ class FileHandler(SimpleHTTPServer.SimpleHTTPRequestHandler, object):
                 self.end_headers()
                 return StringIO.StringIO(buf)
 
-        else:
-            return super(FileHandler, self).send_head()
+        self.send_error(404, 'File not found')
+        return None
 
     # modified version of SimpleHTTPRequestHandler's translate_path
     # to resolve the URL relative to the www/ directory

test/www/__init__.py

@@ -0,0 +1,2 @@
+# This file makes test/www/ into a "package" so that
+# importing Python response hooks works correctly.

test/www/echo.py

@@ -25,4 +25,4 @@ def handle_request(req):
     req.send_header('Content-Type', 'application/json')
     req.send_header('Content-Length', str(len(body)))
     req.end_headers()
-    return StringIO(body)
+    return StringIO.StringIO(body)

test/www/status.py

@@ -10,4 +10,4 @@ def handle_request(req):
     req.send_header('Content-Type', 'text/html')
     req.send_header('Content-Length', str(len(body)))
     req.end_headers()
-    return StringIO(body)
+    return StringIO.StringIO(body)