fetch: detect proxy protocol from source URL path

- detect_proto_from_path() infers socks4/socks5/http from URL
- extract_proxies() now returns (address, proto) tuples
- ppf.py updated to handle protocol-tagged proxies
- profiler signal handler for SIGTERM stats dump

fetch.py

@@ -191,17 +191,47 @@ def is_known_proxy(proxy):
     """Check if proxy is in known cache."""
     return proxy in _known_proxies
 
-def extract_proxies(content, proxydb=None, filter_known=True):
+def detect_proto_from_path(url):
+    """Detect proxy protocol from URL path.
+
+    Many proxy lists indicate protocol in their path:
+    - /socks5/, /socks5.txt, socks5-proxies.txt -> socks5
+    - /socks4/, /socks4a/, /socks4.txt -> socks4
+    - /http/, /http.txt, http-proxies.txt -> http
+    - /https/, /ssl/ -> http (HTTPS proxies use HTTP CONNECT)
+
+    Args:
+        url: Source URL path or full URL
+
+    Returns:
+        Protocol string ('http', 'socks4', 'socks5') or None if not detected
+    """
+    url_lower = url.lower()
+    # Check for socks5 indicators
+    if 'socks5' in url_lower:
+        return 'socks5'
+    # Check for socks4/socks4a indicators
+    if 'socks4' in url_lower:
+        return 'socks4'
+    # Check for http/https/ssl/connect indicators
+    if any(x in url_lower for x in ('/http', 'http-', 'http_', 'http.', '/https', '/ssl', '/connect')):
+        return 'http'
+    return None
+
+
+def extract_proxies(content, proxydb=None, filter_known=True, proto=None):
     """Extract and normalize proxy addresses from content.
 
     Args:
         content: HTML/text content to parse
         proxydb: Database connection for known proxy lookup (optional)
         filter_known: If True, filter out known proxies and return new only
+        proto: Protocol to assign to all extracted proxies (from source URL)
 
     Returns:
         If filter_known: (unique_count, new_proxies) tuple
-        If not filter_known: list of all unique valid proxies
+            new_proxies is list of (address, proto) tuples
+        If not filter_known: list of (address, proto) tuples
     """
     matches = re.findall(r'([0-9]+(?:\.[0-9]+){3}:[0-9]{2,5})[\D$]', cleanhtml(content))
 
@@ -215,7 +245,7 @@ def extract_proxies(content, proxydb=None, filter_known=True):
         p = '%s:%s' % (ip, port)
         uniques_dict[p] = True
 
-    uniques = [p for p in uniques_dict.keys() if is_usable_proxy(p)]
+    uniques = [(p, proto) for p in uniques_dict.keys() if is_usable_proxy(p)]
 
     if not filter_known:
         return uniques
@@ -225,9 +255,9 @@ def extract_proxies(content, proxydb=None, filter_known=True):
         init_known_proxies(proxydb)
 
     new = []
-    for p in uniques:
+    for p, pr in uniques:
         if not is_known_proxy(p):
-            new.append(p)
+            new.append((p, pr))
             add_known_proxies([p])
 
     return len(uniques), new

ppf.py

@@ -16,8 +16,16 @@ import re
 import threading
 import random
 
+# Global profiler for signal handler access
+_profiler = None
+
 # Handle SIGTERM gracefully (for container stop)
 def sigterm_handler(signum, frame):
+    global _profiler
+    if _profiler:
+        _profiler.disable()
+        _profiler.dump_stats('data/profile.stats')
+        _log('profile stats written to data/profile.stats (SIGTERM)', 'info')
     raise KeyboardInterrupt
 
 signal.signal(signal.SIGTERM, sigterm_handler)
@@ -83,7 +91,9 @@ def extract_urls(html, url):
 
 def import_proxies_from_file(proxydb, fn):
     content = open(fn, 'r').read()
-    unique_count, new = fetch.extract_proxies(content, proxydb)
+    # Detect protocol from filename (e.g., socks5.txt, http-proxies.txt)
+    proto = fetch.detect_proto_from_path(fn)
+    unique_count, new = fetch.extract_proxies(content, proxydb, proto=proto)
     if new:
         dbs.insert_proxies(proxydb, new, fn)
         return 0
@@ -134,7 +144,9 @@ class Leechered(threading.Thread):
         else:
             content = ''
 
-        unique = fetch.extract_proxies(content, filter_known=False)
+        # Detect protocol from source URL (e.g., .../socks5/list.txt)
+        proto = fetch.detect_proto_from_path(self.url)
+        unique = fetch.extract_proxies(content, filter_known=False, proto=proto)
 
         # Compute hash of all extracted proxies for change detection
         self.new_hash = dbs.compute_proxy_list_hash(unique)
@@ -152,7 +164,8 @@ class Leechered(threading.Thread):
 
         # Content changed or first fetch - reset stale_count, proceed with normal processing
         self.stale_count = 0
-        self.proxylist = [ proxy for proxy in unique if not fetch.is_known_proxy(proxy) ]
+        # unique is list of (address, proto) tuples; filter by address, keep tuple
+        self.proxylist = [(addr, pr) for addr, pr in unique if not fetch.is_known_proxy(addr)]
         proxy_count = len(self.proxylist)
 
         if self.retrievals == 0:    # new site
@@ -250,9 +263,10 @@ def main():
             for thread in threads:
                 if thread.status == 'ok':
                     url, proxylist, stale_count, error, retrievals, content_type, proxies_added, execute = thread.retrieve()
-                    new = [ p for p in proxylist if not fetch.is_known_proxy(p) ]
+                    # proxylist is list of (address, proto) tuples
+                    new = [(addr, pr) for addr, pr in proxylist if not fetch.is_known_proxy(addr)]
                     if new:
-                        fetch.add_known_proxies(new)
+                        fetch.add_known_proxies([addr for addr, pr in new])
                     # Update content_hash if we have a new one
                     new_hash = thread.new_hash
                     execute = (error, stale_count, int(time.time()), retrievals, proxies_added+len(new), content_type, new_hash, url)
@@ -262,7 +276,7 @@ def main():
 
             threads = [ thread for thread in threads if thread.is_alive() ]
             if len(threads) < config.ppf.threads and rows:
-                p = random.sample(_proxylist, 5) if _proxylist is not None else None
+                p = random.sample(_proxylist, min(5, len(_proxylist))) if _proxylist else None
                 row = random.choice(rows)
                 urldb.execute('UPDATE uris SET check_time=? where url=?', (time.time(), row[0]))
                 urldb.commit()
@@ -297,17 +311,16 @@ if __name__ == '__main__':
         set_nobs(True)
 
     if config.args.profile:
-        _log('profiling enabled, output to profile.stats', 'info')
+        _log('profiling enabled, output to data/profile.stats', 'info')
-        profiler = cProfile.Profile()
+        _profiler = cProfile.Profile()
         try:
-            profiler.enable()
+            _profiler.enable()
             main()
         finally:
-            profiler.disable()
+            _profiler.disable()
-            profiler.dump_stats('profile.stats')
+            _profiler.dump_stats('data/profile.stats')
-            _log('profile stats written to profile.stats', 'info')
+            _log('profile stats written to data/profile.stats', 'info')
-            # print top 20 by cumulative time
+            stats = pstats.Stats('data/profile.stats')
-            stats = pstats.Stats('profile.stats')
             stats.strip_dirs().sort_stats('cumulative').print_stats(20)
     else:
         main()