Ticket #35440: diff.txt

diff --git a/django/utils/http.py b/django/utils/http.py
index 2950f3e695..068fc11e72 100644
--- a/django/utils/http.py
+++ b/django/utils/http.py
@@ -341,6 +341,21 @@ def parse_header_parameters(line, max_length=MAX_HEADER_LENGTH):
 
     if max_length is not None and len(line) > max_length:
         raise ValueError("Unable to parse header parameters (value too long).")
+    
+    if ";" not in line:
+        return line.lower().strip(), {}
+
+    if '"' not in line and "*" not in line and "\\" not in line:
+        parts = line.split(";")
+        key = parts[0].lower().strip()
+        pdict = {}
+        for p in parts[1:]:
+            if "=" in p:
+                name, value = p.split("=", 1)
+                name = name.strip().lower()
+                if name:
+                    pdict[name] = value.strip()
+        return key, pdict
 
     parts = _parseparam(";" + line)
     key = parts.__next__().lower()