Stability tweaks

- More logging
- elif to avoid a spurious 400
- Let folks recover from a task that's already complete: so what, says I?

cry/web.py

@@ -354,17 +354,18 @@ class Handler(http.server.BaseHTTPRequestHandler):
             self.send_error(404)
 
     def do_POST(self):
-        print(f"{self.path}")
         if self.path == "/refresh":
             self.do_refresh()
-        if self.path == "/subscribe":
+        elif self.path == "/subscribe":
             self.do_subscribe()
         else:
+            self.log_error(f"Bad POST: {repr(self.path)}")
             self.send_error(400)
 
     def do_refresh(self):
         global REFRESH_TASK
         if REFRESH_TASK is None or REFRESH_TASK.closed:
+            self.log_message("Starting new refresh task...")
             REFRESH_TASK = refresh_feeds()
 
         self.send_response(303)
@@ -380,6 +381,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
             url = params["url"][0]
         except Exception as e:
             tb = "\n".join(traceback.format_exception(e))
+            self.log_error(f"Bad subscribe request: {tb}")
             self.send_error(400, explain=tb)
             return
 
@@ -392,7 +394,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
         self.end_headers()
 
     def serve_events(self, task: BackgroundTask | None):
-        if task is None or task.closed:
+        if task is None:
             self.send_response(204)
             self.end_headers()
             return
@@ -479,7 +481,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
             });
             events.addEventListener("redirect", (e) => {
               console.log(e);
-              // window.location = e.data;
+              window.location = e.data;
             });
             </script>
             </body>
@@ -546,6 +548,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
             candidates = zip(parsed["t"], parsed["u"])
         except Exception as e:
             tb = "\n".join(traceback.format_exception(e))
+            self.log_error(f"Error parsing query string for subscription: {tb}")
             self.send_error(400, explain=tb)
             return