Курнат Андрей
106 lines
3.0 KiB
Go
106 lines
3.0 KiB
Go
package service
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import (
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"context"
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"net/url"
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"github.com/qsfera/server/pkg/log"
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"github.com/qsfera/server/services/webfinger/pkg/config"
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"github.com/qsfera/server/services/webfinger/pkg/webfinger"
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)
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// Service defines the extension handlers.
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type Service interface {
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// Webfinger is the endpoint for retrieving various href relations.
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//
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// GET /.well-known/webfinger?
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// resource=acct%3Acarol%40example.com&
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// rel=http%3A%2F%2Fwebfinger.qsfera%rel%2Fserver-instance
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// HTTP/1.1
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// Host: example.com
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//
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// The server might respond like this:
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//
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// HTTP/1.1 200 OK
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// Access-Control-Allow-Origin: *
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// Content-Type: application/jrd+json
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//
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// {
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// "subject" : "acct:carol@example.com",
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// "links" :
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// [
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// {
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// "rel" : "http://webfinger.qsfera/rel/server-instance",
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// "href" : "https://instance.example.com",
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// "titles": {
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// "en": "Readable Instance Name"
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// }
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// },
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// {
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// "rel" : "http://webfinger.qsfera/rel/server-instance",
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// "href" : "https://otherinstance.example.com",
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// "titles": {
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// "en": "Other Readable Instance Name"
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// }
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// }
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// ]
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// }
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Webfinger(ctx context.Context, queryTarget *url.URL, rels []string, platform string) (webfinger.JSONResourceDescriptor, error)
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}
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type RelationProvider interface {
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Add(ctx context.Context, platform string, jrd *webfinger.JSONResourceDescriptor)
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}
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// New returns a new instance of Service
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func New(opts ...Option) (Service, error) {
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options := newOptions(opts...)
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// TODO use fallback implementations of InstanceIdLookup and InstanceLookup?
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// The InstanceIdLookup may have to happen earlier?
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return svc{
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log: options.Logger,
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config: options.Config,
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relationProviders: options.RelationProviders,
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}, nil
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}
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type svc struct {
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config *config.Config
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log log.Logger
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relationProviders map[string]RelationProvider
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}
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// TODO implement different implementations:
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// static one returning the href or a configurable domain
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// regex one returning different instances based on the regex that matches
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// claim one that reads a claim and then fetches the instance?
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// that is actually two interfaces / steps:
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// - one that determines the instances/schools id (read from claim, regex match)
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// - one that looks up in instance by id (use template, read from json, read from ldap, read from graph)
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// Webfinger implements the service interface
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func (s svc) Webfinger(ctx context.Context, queryTarget *url.URL, rel []string, platform string) (webfinger.JSONResourceDescriptor, error) {
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jrd := webfinger.JSONResourceDescriptor{
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Subject: queryTarget.String(),
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}
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if len(rel) == 0 {
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// add all configured relation providers
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for _, relation := range s.relationProviders {
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relation.Add(ctx, platform, &jrd)
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}
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} else {
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// only add requested relations
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for _, r := range rel {
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if relation, ok := s.relationProviders[r]; ok {
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relation.Add(ctx, platform, &jrd)
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}
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}
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}
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return jrd, nil
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}
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