restcgi::version_constraint Class Reference

List of all members.

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Detailed Description

Constraint on a resource's version which governs the operation of or response to a method.

A method request may contain a constraint on the version of the resource to which it applies. There are 2 kinds of constraints: the resource's version must be identical to the constraint's (the resource is unmodified) or the resource must have a different version than the constraint's (the resource has been modified).

See also:

version, copy(const request_hdr& rh, version_constraint& vc)

http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.26

Public Types
typedef restcgi::version	version_type
	version type
Public Member Functions
	version_constraint ()
	Construct.
	version_constraint (const version_type &v, bool mod)
	Construct.
bool	is_null () const
	Test if null.
const version_type &	version () const
	Get version.
bool	modified () const
void	assert_satisfied (const version_type &v, const method_e &e) const

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Member Function Documentation

void restcgi::version_constraint::assert_satisfied	(	const version_type &	v,
		const method_e &	e
	)			const

Assert that the given version satisfies the constraint. This will check the version tags (if any) first then the expiration dates (if any). See class description.

Exceptions:

	precondition_failed	unmodified constraint not met or modified tag constraint not met
	not_modified	modified date-time constraint not met

bool restcgi::version_constraint::modified

(

)

const [inline]

Get whether constrained to be modified.

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