Add BookWyrm user-agent to http requests

This allows other software to identify BookWyrm in calls, as well as
will allow BookWyrm to differentiate between calls done from other
fediverse software and BookWyrm to answer with specific BookWyrm data.

bookwyrm/broadcast.py

@@ -3,7 +3,7 @@ import json
 from django.utils.http import http_date
 import requests
 
-from bookwyrm import models
+from bookwyrm import models, settings
 from bookwyrm.activitypub import ActivityEncoder
 from bookwyrm.tasks import app
 from bookwyrm.signatures import make_signature, make_digest
@@ -79,6 +79,7 @@ def sign_and_send(sender, data, destination):
             'Digest': digest,
             'Signature': make_signature(sender, destination, now, digest),
             'Content-Type': 'application/activity+json; charset=utf-8',
+            'User-Agent': settings.USER_AGENT,
         },
     )
     if not response.ok:

bookwyrm/connectors/abstract_connector.py

@@ -8,7 +8,7 @@ import requests
 from requests import HTTPError
 from requests.exceptions import SSLError
 
-from bookwyrm import activitypub, models
+from bookwyrm import activitypub, models, settings
 
 
 class ConnectorException(HTTPError):
@@ -42,6 +42,7 @@ class AbstractMinimalConnector(ABC):
             '%s%s' % (self.search_url, query),
             headers={
                 'Accept': 'application/json; charset=utf-8',
+                'User-Agent': settings.USER_AGENT,
             },
         )
         if not resp.ok:
@@ -196,6 +197,7 @@ def get_data(url):
             url,
             headers={
                 'Accept': 'application/json; charset=utf-8',
+                'User-Agent': settings.USER_AGENT,
             },
         )
     except RequestError:
@@ -213,7 +215,12 @@ def get_data(url):
 def get_image(url):
     ''' wrapper for requesting an image '''
     try:
-        resp = requests.get(url)
+        resp = requests.get(
+            url,
+            headers={
+                'User-Agent': settings.USER_AGENT,
+            },
+        )
     except (RequestError, SSLError):
         return None
     if not resp.ok:

bookwyrm/settings.py

@@ -3,6 +3,8 @@ import os
 
 from environs import Env
 
+import requests
+
 env = Env()
 DOMAIN = env('DOMAIN')
 
@@ -150,3 +152,7 @@ STATIC_URL = '/static/'
 STATIC_ROOT = os.path.join(BASE_DIR, env('STATIC_ROOT', 'static'))
 MEDIA_URL = '/images/'
 MEDIA_ROOT = os.path.join(BASE_DIR, env('MEDIA_ROOT', 'images'))
+
+USER_AGENT = "%s (BookWyrm/%s; +https://%s/)" % (requests.utils.default_user_agent(),
+        "0.1", # TODO: change 0.1 into actual version
+        DOMAIN)