No fail if proxy is not accessible

README.md

@@ -103,7 +103,6 @@ A list of ideas and TODO. Don't hesitate to give feedback on the ones you really
 * if doi does not exist ?
 * download djvu
 * test file field for bibtex
-* No fail if proxy not accessible
 * Open
 * Confirmation for deletion
 * Rebuild

fetcher.py

@@ -5,9 +5,19 @@
 Fetches papers.
 """
 
+from __future__ import print_function
+import sys
 import requesocks as requests
 import params
 
+
+def warning(*objs):
+    """
+    Write to stderr
+    """
+    print("WARNING: ", *objs, file=sys.stderr)
+
+
 def download_url(url):
     for proxy in params.proxies:
         r_proxy = {
@@ -15,11 +25,15 @@ def download_url(url):
             "https": proxy,
         }
 
+        try:
             r = requests.get(url, proxies=r_proxy)
 
             if r.status_code != 200 or 'pdf' not in r.headers['content-type']:
                 continue
 
             return r.content
+        except:
+            warning("Proxy "+proxy+" not available.")
+            continue
 
     return False