Web site construction - CHAPTER 5 PERMUTATIONS PATTERN Sometimes when implementing
CHAPTER 5 PERMUTATIONS PATTERN Sometimes when implementing the Permutations pattern it is not possible or desirable to return content solely based on the AcceptHTTP header. In those instances, it is possible to specify the content that is retrieved by using a parameter in the query. An example is http://mydomain.com/mybooks/1223?accept=text/xml. The query parameter accept is an arbitrary value and has no special value other then being illustrative in this example. Even though all of the examples used HTTP GET to retrieve the correct content, the same rules apply for HTTP POST because an HTTP POST can generate data. A URL rewriter component need not use only a single HTTP header such as Accept. A more sophisticated URL rewriter component will base its decisions on all information passed to it by the HTTP request and then make a single URL rewrite decision. E B V
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