Fix eReader metadata reading.

src/calibre/ebooks/metadata/ereader.py

@@ -24,19 +24,22 @@ def get_metadata(stream, extract_cover=True):
     stream.seek(0)
 
     pheader = PdbHeaderReader(stream)
-    hr = HeaderRecord(pheader.section_data(0))
 
-    if hr.version in (2, 10) and hr.has_metadata == 1:
-        try:
-            mdata = pheader.section_data(hr.metadata_offset)
+    # Only Dropbook produced 132 byte record0 files are supported
+    if len(pheader.section_data(0)) == 132:
+        hr = HeaderRecord(pheader.section_data(0))
 
-            mdata = mdata.split('\x00')
-            mi.title = mdata[0]
-            mi.authors = [mdata[1]]
-            mi.publisher = mdata[3]
-            mi.isbn = mdata[4]
-        except:
-            pass
+        if hr.version in (2, 10) and hr.has_metadata == 1:
+            try:
+                mdata = pheader.section_data(hr.metadata_offset)
+
+                mdata = mdata.split('\x00')
+                mi.title = mdata[0]
+                mi.authors = [mdata[1]]
+                mi.publisher = mdata[3]
+                mi.isbn = mdata[4]
+            except:
+                pass
 
     if not mi.title:
         mi.title = pheader.title if pheader.title else _('Unknown')

src/calibre/ebooks/metadata/pdb.py

@@ -38,7 +38,6 @@ def get_metadata(stream, extract_cover=True):
     if MetadataReader is None:
         return MetaInformation(pheader.title, [_('Unknown')])
 
-    
     return MetadataReader(stream, extract_cover)
     
 def set_metadata(stream, mi):

src/calibre/ebooks/pdb/ereader/reader202.py

@@ -11,7 +11,6 @@ import os
 import struct
 
 from calibre import CurrentDir
-from calibre.ebooks.metadata import MetaInformation
 from calibre.ebooks.metadata.opf2 import OPFCreator
 from calibre.ebooks.pml.pmlconverter import pml_to_html
 from calibre.ebooks.compression.palmdoc import decompress_doc
@@ -48,6 +47,9 @@ class Reader202(FormatReader):
         if self.header_record.version != 4:
             raise EreaderError('Unknown book version %i.' % self.header_record.version)
 
+        from calibre.ebooks.metadata.pdb import get_metadata
+        self.mi = get_metadata(stream, False)
+
     def section_data(self, number):
         return self.sections[number]
 
@@ -62,7 +64,7 @@ class Reader202(FormatReader):
         if data.startswith('PNG'):
             name = data[4:4 + 32].strip('\x00')
             img = data[62:]
-            
+
         return name, img
 
     def get_text_page(self, number):
@@ -114,7 +116,7 @@ class Reader202(FormatReader):
 
     def create_opf(self, output_dir, images):
         with CurrentDir(output_dir):
-            opf = OPFCreator(output_dir, MetaInformation(_('Unknown'), _('Unknown')))
+            opf = OPFCreator(output_dir, self.mi)
 
             manifest = [('index.html', None)]