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Format of HTTP response header names and values

The name of the HTTP response header you want to set or remove can only contain:

  • Alphanumeric characters: a-z and A-Z
  • The following special characters: - and _

The value of the HTTP response header you want to set can only contain:

  • Alphanumeric characters: a-z and A-Z
  • The following special characters: _ :;.,\/"'?!(){}[]@<>=-+*#$&`|~^%