handle application errors

examples/pylonstest/development.ini

@@ -4,7 +4,7 @@
 # The %(here)s variable will be replaced with the parent directory of this file
 #
 [DEFAULT]
-debug = false
+debug = true
 # Uncomment and replace with the address which should receive any error reports
 #email_to = you@yourdomain.com
 smtp_server = localhost

gunicorn/http/response.py

@@ -18,7 +18,7 @@ class HttpResponse(object):
     def send(self):
         # send headers
         resp_head = []    
-        resp_head.append("HTTP/1.1 %s\r\n" % (self.status))
+        resp_head.append("HTTP/1.0 %s\r\n" % (self.status))
     
         resp_head.append("Server: %s\r\n" % self.SERVER_VERSION)
         resp_head.append("Date: %s\r\n" % http_date())

gunicorn/util.py

@@ -61,7 +61,10 @@ def write(sock, data):
             raise
         i += 1
 
-
+def writelines(sock, lines):
+    for line in list(lines):
+        write(sock, line)
+        
 def normalize_name(name):
     return  "-".join([w.lower().capitalize() for w in name.split("-")])
     

gunicorn/worker.py

@@ -12,6 +12,7 @@ import signal
 import socket
 import sys
 import tempfile
+import traceback
 
 from gunicorn import http
 from gunicorn import util
@@ -115,7 +116,19 @@ class Worker(object):
         util.close_on_exec(client)
         try:
             req = http.HttpRequest(client, addr, self.address)
-            response = self.app(req.read(), req.start_response)
+            try:
+                response = self.app(req.read(), req.start_response)
+            except Exception, e:
+                exc = ''.join(traceback.format_exception(*sys.exc_info()))
+                msg = "<h1>Internal Server Error</h1><h2>wsgi error:</h2><pre>%s</pre>" % exc
+                util.writelines(client, 
+                ["HTTP/1.0 500 Internal Server Error\r\n",
+                "Connection: close\r\n",
+                "Content-type: text/html\r\n",
+                "Content-length: %s\r\n" % str(len(msg)),
+                "\r\n",
+                msg])
+                return 
             http.HttpResponse(client, response, req).send()
         except Exception, e:
             self.log.exception("Error processing request. [%s]" % str(e))