1 files changed, 34 insertions, 0 deletions
diff --git a/gallery_dl/util.py b/gallery_dl/util.py
index 98b6d59..8ce1fb4 100644
--- a/gallery_dl/util.py
+++ b/gallery_dl/util.py
@@ -19,6 +19,7 @@ import binascii
 import datetime
 import functools
 import itertools
+import subprocess
 import urllib.parse
 from http.cookiejar import Cookie
 from email.utils import mktime_tz, parsedate_tz
@@ -273,6 +274,39 @@ Response Headers
         fp.write(response.content)
 
 
+def extract_headers(response):
+    headers = response.headers
+    data = dict(headers)
+
+    hcd = headers.get("content-disposition")
+    if hcd:
+        name = text.extr(hcd, 'filename="', '"')
+        if name:
+            text.nameext_from_url(name, data)
+
+    hlm = headers.get("last-modified")
+    if hlm:
+        data["date"] = datetime.datetime(*parsedate_tz(hlm)[:6])
+
+    return data
+
+
+@functools.lru_cache(maxsize=None)
+def git_head():
+    try:
+        out, err = subprocess.Popen(
+            ("git", "rev-parse", "--short", "HEAD"),
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            cwd=os.path.dirname(os.path.abspath(__file__)),
+        ).communicate()
+        if out and not err:
+            return out.decode().rstrip()
+    except (OSError, subprocess.SubprocessError):
+        pass
+    return None
+
+
 def expand_path(path):
     """Expand environment variables and tildes (~)"""
     if not path: