Improved handling of default country

Also added fallback 1px empty gif as a replacement for images that fail
to load

app/models/config.py

@@ -51,6 +51,7 @@ class Config:
     ]
 
     COUNTRIES = [
+        {'name': 'Default (use server location)', 'value': ''},
         {'name': 'Afghanistan', 'value': 'countryAF'},
         {'name': 'Albania', 'value': 'countryAL'},
         {'name': 'Algeria', 'value': 'countryDZ'},

app/request.py

@@ -46,7 +46,7 @@ def gen_query(query, args, config, near_city=None):
         param_dict['start'] = '&start=' + args.get('start')
 
     # Search for results near a particular city, if available
-    if near_city is not None:
+    if near_city:
         param_dict['near'] = '&near=' + urlparse.quote(near_city)
 
     # Set language for results (lr) and interface (hl)

app/routes.py

@@ -3,6 +3,7 @@ from app.filter import Filter, get_first_link
 from app.models.config import Config
 from app.request import Request, gen_query
 import argparse
+import base64
 from bs4 import BeautifulSoup
 from cryptography.fernet import Fernet, InvalidToken
 from flask import g, make_response, request, redirect, render_template, send_file
@@ -10,6 +11,7 @@ from functools import wraps
 import io
 import json
 import os
+from pycurl import error as pycurl_error
 import urllib.parse as urlparse
 import waitress
 
@@ -163,17 +165,24 @@ def imgres():
 def tmp():
     cipher_suite = Fernet(app.secret_key)
     img_url = cipher_suite.decrypt(request.args.get('image_url').encode()).decode()
-    file_data = g.user_request.send(base_url=img_url, return_bytes=True)
-    tmp_mem = io.BytesIO()
-    tmp_mem.write(file_data)
-    tmp_mem.seek(0)
 
-    return send_file(
+    try:
-        tmp_mem,
+        file_data = g.user_request.send(base_url=img_url, return_bytes=True)
-        as_attachment=True,
+        tmp_mem = io.BytesIO()
-        attachment_filename='tmp.png',
+        tmp_mem.write(file_data)
-        mimetype='image/png'
+        tmp_mem.seek(0)
-    )
+
+        return send_file(
+            tmp_mem,
+            as_attachment=True,
+            attachment_filename='tmp.png',
+            mimetype='image/png'
+        )
+    except pycurl_error:
+        pass
+
+    empty_gif = base64.b64decode('R0lGODlhAQABAIAAAP///////yH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==')
+    return send_file(io.BytesIO(empty_gif), mimetype='image/gif')
 
 
 @app.route('/window')