136 lines
3.9 KiB
Go
136 lines
3.9 KiB
Go
// Copyright 2019 Drone IO, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package acl
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import (
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"net/http"
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"time"
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"github.com/drone/drone/core"
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"github.com/drone/drone/handler/api/errors"
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"github.com/drone/drone/handler/api/render"
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"github.com/drone/drone/handler/api/request"
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"github.com/drone/drone/logger"
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"github.com/go-chi/chi"
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"github.com/sirupsen/logrus"
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)
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// InjectRepository returns an http.Handler middleware that injects
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// the repository and repository permissions into the context.
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func InjectRepository(
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repoz core.RepositoryService,
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repos core.RepositoryStore,
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perms core.PermStore,
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) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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var (
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ctx = r.Context()
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owner = chi.URLParam(r, "owner")
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name = chi.URLParam(r, "name")
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)
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log := logger.FromRequest(r).WithFields(
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logrus.Fields{
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"namespace": owner,
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"name": name,
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},
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)
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// the user is stored in the context and is
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// provided by a an ancestor middleware in the
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// chain.
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user, sessionExists := request.UserFrom(ctx)
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repo, err := repos.FindName(ctx, owner, name)
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if err != nil {
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if sessionExists {
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render.NotFound(w, errors.ErrNotFound)
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} else {
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render.Unauthorized(w, errors.ErrUnauthorized)
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}
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log.WithError(err).Debugln("api: repository not found")
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return
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}
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// the repository is stored in the request context
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// and can be accessed by subsequent handlers in the
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// request chain.
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ctx = request.WithRepo(ctx, repo)
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// if the user does not exist in the request context,
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// this is a guest session, and there are no repository
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// permissions to lookup.
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if !sessionExists {
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next.ServeHTTP(w, r.WithContext(ctx))
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return
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}
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// else get the cached permissions from the database
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// for the user and repository.
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perm, err := perms.Find(ctx, repo.UID, user.ID)
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if err != nil {
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// if the permissions are not found we forward
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// the request to the next handler in the chain
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// with no permissions in the context.
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//
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// It is the responsibility to downstream
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// middleware and handlers to decide if the
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// request should be rejected.
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next.ServeHTTP(w, r.WithContext(ctx))
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return
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}
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log = log.WithFields(
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logrus.Fields{
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"read": perm.Read,
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"write": perm.Write,
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"admin": perm.Admin,
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},
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)
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// because the permissions are synced with the remote
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// system (e.g. github) they may be stale. If the permissions
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// are stale they are refreshed below.
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if perm.Synced == 0 || time.Unix(perm.Synced, 0).Add(time.Hour).Before(time.Now()) {
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log.Debugln("api: sync repository permissions")
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permv, err := repoz.FindPerm(ctx, user, repo.Slug)
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if err != nil {
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render.NotFound(w, errors.ErrNotFound)
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log.WithError(err).
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Warnln("api: cannot sync repository permissions")
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return
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}
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perm.Synced = time.Now().Unix()
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perm.Read = permv.Read
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perm.Write = permv.Write
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perm.Admin = permv.Admin
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err = perms.Update(ctx, perm)
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if err != nil {
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log.WithError(err).Debugln("api: cannot cache repository permissions")
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} else {
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log.Debugln("api: repository permissions synchronized")
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}
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}
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ctx = request.WithPerm(ctx, perm)
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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}
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