51 lines
2.3 KiB
Plaintext
51 lines
2.3 KiB
Plaintext
In Racket 5.0.99.4 and before, the Web Server supported implicit conversion of X-expressions and lists with the format (cons/c bytes? (listof (or/c string? bytes?))) into response data
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structures for output.
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The compatibility binding for normalize-response is a coercion from the OLD responses to the NEW response structure.
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Other incompatibilities introduced:
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The contract on read-mime-types specifies what kind of hash it returns.
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send/formlet requires that the wrapper return an Xexpr
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response/basic was removed.
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response/full was removed.
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response/port was removed [1]
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The response/incremental structure was removed.
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response/c was removed.
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make-xexpr-response was renamed response/xexpr and extended.
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normalize-response was removed.
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xexpr-response/cookies was removed and folded into response/xexpr.
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The following places are where old responses were accepted and no longer are:
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configuration-table responders
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authentication responder on dispatchers/dispatch-passwords
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servlet-loading responder on dispatchers/dispatch-servlets
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#lang web-server/insta [2]
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lang/web --- make-stateless-servlet
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private/servlet --- handler field
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servlet-env --- serve/servlet's #:file-not-found-responder arg
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serlet/servlet-structs --- response-generator/c, expiration-handler/c
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servlet/setup --- make*servlet
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servlet/web --- with-errors-to-browser
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The following places are where old responses were accepted and no longer are, but compatible bindings are provided:
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dispatch/serve --- serve/dispatch
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dispatchers/dispatch-lift --- make
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dispatchers/dispatch-pathprocedure --- make
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http/response --- output-response and output-response/method
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servlet-dispatch --- dispatch/servlet
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servlet-env --- serve/servlet
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servlet/web --- send/*
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Here are some ideas that could be use to ease backwards compatibility:
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* A new servlet version for module servlets that puts an old contract on the return from start.
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Footnotes:
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1. response/port was present for about a week, so no compatibility is provided.
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2. If anyone can suggest a good way to provide a compatibility layer without duplicating code, I'm interested. The problem is that web-server/insta walks the module source to find the "start" function, and we'd presumably want to overwrite that. Plus, web-server/insta will import other bindings that now have imcompatibilities.
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