Class PAOSHeader


  • @SupportedAll
    public class PAOSHeader
    extends Object
    The PAOSHeader class is used by a web application on HTTP server side to parse a PAOS header in an HTTP request from the user agent side. This header is used by the User Agent as a PAOS server to publish which services are available, which PAOS versions are supported, etc.. An example PAOS header looks like the following:
     PAOS: ver="ver1","ver2",ext="ext1","ext2";"service1","opt11",
               "opt12";"service2","opt21","opt22"
     
    This class has methods for obtaining all the parts inside such a header.
    • Constructor Detail

      • PAOSHeader

        public PAOSHeader​(javax.servlet.http.HttpServletRequest req)
                   throws PAOSException
        This constructor accepts an HttpServletRequest and tries to parse the PAOS header string if there is one inside.
        Parameters:
        req - the incoming HTTP request which is supposed to contain the PAOS header.
        Throws:
        PAOSException - if there are any parsing errors because the PAOS header is not there at all or because its content is not compliant to the PAOS specifications.
      • PAOSHeader

        public PAOSHeader​(String paosHeaderString)
                   throws PAOSException
        This constructor accepts a PAOS header string and tries to parse it.
        Parameters:
        paosHeaderString - the PAOS header string which supposedly contains information on available services, etc..
        Throws:
        PAOSException - if there are any parsing error because the PAOS header is invalid.
    • Method Detail

      • getVersions

        public Iterator getVersions()
        Returns the list of versions as Strings.
        Returns:
        the list of versions as Strings.
      • getExtensions

        public Iterator getExtensions()
        Returns the list of extensions as Strings.
        Returns:
        the list of extensions as Strings.
      • getServicesAndOptions

        public HashMap getServicesAndOptions()
        Returns a HashMap containing the services and corresponding options.
        Returns:
        a HashMap with each key being a service represented as a String, and with each value being a Set of the corresponding options represented as Strings