text: import zlib
  from ._backends import JWE_ALG_ALGORITHMS, JWE_ENC_ALGORITHMS
  from ..rfc7516 import JWEZipAlgorithm
  
  
  __all__ = [
      'JWE_ALG_ALGORITHMS', 'JWE_ENC_ALGORITHMS',
      'JWE_ZIP_ALGORITHMS', 'JWE_ALGORITHMS',
  ]
  
  
  class DeflateZipAlgorithm(JWEZipAlgorithm):
      name = 'DEF'
      description = 'DEFLATE'
  
      def compress(self, s):
          """Compress bytes data with DEFLATE algorithm."""
          data = zlib.compress(s)
          # drop gzip headers and tail
          return data[2:-4]
  
      def decompress(self, s):
          """Decompress DEFLATE bytes data."""
          return zlib.decompress(s, -zlib.MAX_WBITS)
  
  
  JWE_ZIP_ALGORITHMS = [DeflateZipAlgorithm()]
  JWE_ALGORITHMS = JWE_ALG_ALGORITHMS + JWE_ENC_ALGORITHMS + JWE_ZIP_ALGORITHMS
  