Update PDF code for Python2

bundle_calibre_plugin.sh

@@ -17,6 +17,7 @@ popd
 
 # Delete cache
 rm -r __pycache__
+rm *.pyc
 
 # Set module ID. This needs to be changed if any of the module ZIPs change.
 echo -n "2021-12-19-03" > module_id.txt

calibre-plugin/libadobe.py

@@ -392,6 +392,8 @@ def encrypt_with_device_key(data):
     for _ in range(remain):
         data.append(remain)
 
+    data = bytes(data)
+
 
     iv = Random.get_random_bytes(16)
     cip = AES.new(devkey_bytes, AES.MODE_CBC, iv)

calibre-plugin/libpdf.py

@@ -1,25 +1,37 @@
-import os, zlib, base64, time
+import sys, os, zlib, base64, time
 
 class BackwardReader:
 
     def __init__(self, file):
         self.file = file
 
+
     def readlines(self):
         BLKSIZE = 4096
         # Move reader to the end of file
         self.file.seek(0, os.SEEK_END)
+        if sys.version_info[0] >= 3:
             buffer = bytearray()
+        else:
+            buffer = ""
 
         while True:
+            if sys.version_info[0] >= 3:
                 pos_newline = buffer.rfind(bytes([0x0a]))
+            else:
+                pos_newline = buffer.rfind("\n")
+
             # Get the current position of the reader
             current_pos = self.file.tell()
             if pos_newline != -1:
                 # Newline is found
                 line = buffer[pos_newline+1:]
                 buffer = buffer[:pos_newline]
+                if sys.version_info[0] >= 3:
                     yield line.decode("latin-1")
+                else:
+                    yield line
+
             elif current_pos:
                 # Need to fill the buffer
                 to_read = min(BLKSIZE, current_pos)
@@ -27,13 +39,17 @@ class BackwardReader:
                 buffer = self.file.read(to_read) + buffer
                 self.file.seek(current_pos-to_read, 0)
                 if current_pos is to_read:
+                    if sys.version_info[0] >= 3:
                         buffer = bytes([0x0a]) + buffer
+                    else:
+                        buffer = "\n" + buffer
             else:
                 # Start of file
                 return
 
 
 
+
 def trim_encrypt_string(encrypt):
 
     string_list = list(encrypt)