Gather and wait on async requests

This sends out the request tasks all at once and then aggregates the
results, instead of just running them one after another asynchronously.

bookwyrm/connectors/connector_manager.py

@@ -12,7 +12,7 @@ from django.db.models import signals
 from requests import HTTPError
 
 from bookwyrm import book_search, models
-from bookwyrm.settings import SEARCH_TIMEOUT, USER_AGENT
+from bookwyrm.settings import QUERY_TIMEOUT, USER_AGENT
 from bookwyrm.tasks import app
 
 logger = logging.getLogger(__name__)
@@ -22,9 +22,8 @@ class ConnectorException(HTTPError):
     """when the connector can't do what was asked"""
 
 
-async def async_connector_search(query, items, params):
-    """Try a number of requests simultaneously"""
-    timeout = aiohttp.ClientTimeout(total=SEARCH_TIMEOUT)
+async def get_results(session, url, params, query, connector):
+    """try this specific connector"""
     # pylint: disable=line-too-long
     headers = {
         "Accept": (
@@ -32,21 +31,36 @@ async def async_connector_search(query, items, params):
         ),
         "User-Agent": USER_AGENT,
     }
+    try:
+        async with session.get(url, headers=headers, params=params) as response:
+            try:
+                raw_data = await response.json()
+            except aiohttp.client_exceptions.ContentTypeError as err:
+                logger.exception(err)
+                return None
+
+            return {
+                "connector": connector,
+                "results": connector.process_search_response(query, raw_data),
+            }
+    except asyncio.TimeoutError:
+        logger.exception("Connection timout for url: %s", url)
+
+
+async def async_connector_search(query, items, params):
+    """Try a number of requests simultaneously"""
+    timeout = aiohttp.ClientTimeout(total=QUERY_TIMEOUT)
     async with aiohttp.ClientSession(timeout=timeout) as session:
+        tasks = []
         for url, connector in items:
-            url = connector.get_search_url(query)
-            # raise_not_valid_url(url)
+            tasks.append(
+                asyncio.ensure_future(
+                    get_results(session, url, params, query, connector)
+                )
+            )
 
-            async with session.get(url, headers=headers, params=params) as response:
-                print("Status:", response.status)
-                print(response.ok)
-                print("Content-type:", response.headers["content-type"])
-
-                raw_response = await response.json()
-                return {
-                    "connector": connector,
-                    "results": connector.process_search_response(query, raw_response),
-                }
+        results = await asyncio.gather(*tasks)
+        return results
 
 
 def search(query, min_confidence=0.1, return_first=False):
@@ -66,13 +80,13 @@ def search(query, min_confidence=0.1, return_first=False):
     # load as many results as we can
     params = {"min_confidence": min_confidence}
     results = asyncio.run(async_connector_search(query, items, params))
-    raise Exception("Hi")
 
     if return_first:
         # find the best result from all the responses and return that
         raise Exception("Not implemented yet")
 
-    return results
+    # failed requests will return None, so filter those out
+    return [r for r in results if r]
 
 
 def first_search_result(query, min_confidence=0.1):