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83 lines
3.6 KiB
Go
83 lines
3.6 KiB
Go
package pub
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import (
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"context"
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"net/http"
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"github.com/superseriousbusiness/activity/streams/vocab"
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)
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// SocialProtocol contains behaviors an application needs to satisfy for the
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// full ActivityPub C2S implementation to be supported by this library.
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//
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// It is only required if the client application wants to support the client-to-
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// server, or social, protocol.
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//
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// It is passed to the library as a dependency injection from the client
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// application.
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type SocialProtocol interface {
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// Hook callback after parsing the request body for a client request
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// to the Actor's outbox.
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//
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// Can be used to set contextual information based on the
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// ActivityStreams object received.
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//
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// Only called if the Social API is enabled.
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//
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// Warning: Neither authentication nor authorization has taken place at
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// this time. Doing anything beyond setting contextual information is
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// strongly discouraged.
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//
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// If an error is returned, it is passed back to the caller of
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// PostOutbox. In this case, the DelegateActor implementation must not
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// write a response to the ResponseWriter as is expected that the caller
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// to PostOutbox will do so when handling the error.
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PostOutboxRequestBodyHook(c context.Context, r *http.Request, data vocab.Type) (context.Context, error)
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// AuthenticatePostOutbox delegates the authentication of a POST to an
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// outbox.
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//
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// Only called if the Social API is enabled.
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//
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// If an error is returned, it is passed back to the caller of
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// PostOutbox. In this case, the implementation must not write a
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// response to the ResponseWriter as is expected that the client will
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// do so when handling the error. The 'authenticated' is ignored.
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//
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// If no error is returned, but authentication or authorization fails,
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// then authenticated must be false and error nil. It is expected that
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// the implementation handles writing to the ResponseWriter in this
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// case.
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//
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// Finally, if the authentication and authorization succeeds, then
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// authenticated must be true and error nil. The request will continue
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// to be processed.
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AuthenticatePostOutbox(c context.Context, w http.ResponseWriter, r *http.Request) (out context.Context, authenticated bool, err error)
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// SocialCallbacks returns the application logic that handles
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// ActivityStreams received from C2S clients.
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//
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// Note that certain types of callbacks will be 'wrapped' with default
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// behaviors supported natively by the library. Other callbacks
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// compatible with streams.TypeResolver can be specified by 'other'.
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//
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// For example, setting the 'Create' field in the SocialWrappedCallbacks
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// lets an application dependency inject additional behaviors they want
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// to take place, including the default behavior supplied by this
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// library. This is guaranteed to be compliant with the ActivityPub
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// Social protocol.
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//
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// To override the default behavior, instead supply the function in
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// 'other', which does not guarantee the application will be compliant
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// with the ActivityPub Social Protocol.
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//
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// Applications are not expected to handle every single ActivityStreams
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// type and extension. The unhandled ones are passed to DefaultCallback.
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SocialCallbacks(c context.Context) (wrapped SocialWrappedCallbacks, other []interface{}, err error)
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// DefaultCallback is called for types that go-fed can deserialize but
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// are not handled by the application's callbacks returned in the
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// Callbacks method.
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//
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// Applications are not expected to handle every single ActivityStreams
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// type and extension, so the unhandled ones are passed to
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// DefaultCallback.
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DefaultCallback(c context.Context, activity Activity) error
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}
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