BUG: Fix zlib -5 error for corrupt files (#603)

Closes #609 Closes #88
py-pdf · Apr 16, 2022 · 354f8ce · 354f8ce
1 parent 89bc093
commit 354f8ce
Showing 1 changed file with 11 additions and 1 deletion.
diff --git a/PyPDF2/filters.py b/PyPDF2/filters.py
@@ -54,7 +54,17 @@
     import zlib
 
     def decompress(data):
-        return zlib.decompress(data)
+        try:
+            return zlib.decompress(data)
+        except zlib.error:
+            d = zlib.decompressobj(zlib.MAX_WBITS | 32)
+            result_str = b''
+            for b in [data[i:i + 1] for i in range(len(data))]:
+                try:
+                    result_str += d.decompress(b)
+                except zlib.error:
+                    pass
+            return result_str
 
     def compress(data):
         return zlib.compress(data)