code: def _splitBigChunk(self, content, logid):
          
          # if it's small enough, just return it
          if len(content) < self.MAX_CHUNK_SIZE:
              return content, None
  
          # find the last newline before the limit
          i = content.rfind(b'\n', 0, self.MAX_CHUNK_SIZE)
          if i != -1:
              return content[:i], content[i + 1:]
  
          log.msg('truncating long line for log %d' % logid)
  
          # first, truncate this down to something that decodes correctly
          truncline = content[:self.MAX_CHUNK_SIZE]
          while truncline:
              try:
                  truncline.decode('utf-8')
                  break
              except UnicodeDecodeError:
                  truncline = truncline[:-1]
  
          # then find the beginning of the next line
          i = content.find(b'\n', self.MAX_CHUNK_SIZE)
          if i == -1:
              return truncline, None
          return truncline, content[i + 1:]
docs: Split CONTENT on a line boundary into a prefix smaller than 64k and
          a suffix containing the remainder, omitting the splitting newline.