73 lines
1.8 KiB
Plaintext
73 lines
1.8 KiB
Plaintext
note
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description: "Conforming handler for any HTTP 1.1 standard method"
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author: "Colin Adams"
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date: "$Date$"
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revision: "$Revision$"
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deferred class WSF_METHOD_HANDLER
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feature -- Method
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do_method (req: WSF_REQUEST; res: WSF_RESPONSE)
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-- Respond to `req' using `res'.
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require
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req_not_void: req /= Void
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res_not_void: res /= Void
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deferred
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ensure
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valid_response_for_http_1_0: is_1_0 (req.server_protocol) implies
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valid_response_for_http_1_0 (res.status_code)
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empty_body_for_no_content_response: is_no_content_response (res.status_code) implies is_empty_content (res)
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end
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feature -- Contract support
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is_1_0 (a_protocol: READABLE_STRING_8): BOOLEAN
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-- Is `a_protocol' (a variant of) HTTP 1.0?
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require
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a_protocol_not_void: a_protocol /= Void
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do
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Result := a_protocol.count >= 8 and then
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a_protocol.substring (1, 8) ~ "HTTP/1.0"
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end
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valid_response_for_http_1_0 (a_status_code: INTEGER): BOOLEAN
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-- Is `a_status_code' a valid response to HTTP 1.0?
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do
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-- 1XX is forbidden
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-- first approximation
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Result := a_status_code >= {HTTP_STATUS_CODE}.ok
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end
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is_no_content_response (a_status_code: INTEGER): BOOLEAN
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-- Is `a_status_code' one that does not permit an entity in the response?
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do
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inspect
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a_status_code
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when {HTTP_STATUS_CODE}.no_content then
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Result := True
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when {HTTP_STATUS_CODE}.reset_content then
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Result := True
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when {HTTP_STATUS_CODE}.not_modified then
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Result := True
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when {HTTP_STATUS_CODE}.conflict then
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Result := True
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else
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-- default to False
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end
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end
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is_empty_content (res: WSF_RESPONSE): BOOLEAN
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-- Does `res' not contain an entity?
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require
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res_not_void: res /= Void
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do
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Result := res.transfered_content_length = 0 -- Is that the right measure?
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end
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end
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