103 lines
2.5 KiB
Go
103 lines
2.5 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 events
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import (
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"context"
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"io"
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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/request"
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"github.com/drone/drone/logger"
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)
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// HandleGlobal creates an http.HandlerFunc that streams builds events
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// to the http.Response in an event stream format.
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func HandleGlobal(
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repos core.RepositoryStore,
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events core.Pubsub,
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) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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logger := logger.FromRequest(r)
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h := w.Header()
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h.Set("Content-Type", "text/event-stream")
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h.Set("Cache-Control", "no-cache")
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h.Set("Connection", "keep-alive")
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h.Set("X-Accel-Buffering", "no")
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f, ok := w.(http.Flusher)
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if !ok {
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return
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}
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access := map[string]struct{}{}
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user, authenticated := request.UserFrom(r.Context())
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if authenticated {
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list, _ := repos.List(r.Context(), user.ID)
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for _, repo := range list {
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access[repo.Slug] = struct{}{}
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}
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}
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io.WriteString(w, ": ping\n\n")
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f.Flush()
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ctx, cancel := context.WithCancel(r.Context())
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defer cancel()
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events, errc := events.Subscribe(ctx)
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logger.Debugln("events: stream opened")
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L:
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for {
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select {
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case <-ctx.Done():
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logger.Debugln("events: stream cancelled")
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break L
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case <-errc:
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logger.Debugln("events: stream error")
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break L
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case <-time.After(time.Hour):
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logger.Debugln("events: stream timeout")
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break L
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case <-time.After(pingInterval):
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io.WriteString(w, ": ping\n\n")
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f.Flush()
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case event := <-events:
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_, authorized := access[event.Repository]
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if event.Visibility == core.VisibilityPublic {
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authorized = true
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}
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if event.Visibility == core.VisibilityInternal && authenticated {
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authorized = true
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}
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if authorized {
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io.WriteString(w, "data: ")
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w.Write(event.Data)
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io.WriteString(w, "\n\n")
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f.Flush()
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}
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}
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}
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io.WriteString(w, "event: error\ndata: eof\n\n")
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f.Flush()
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logger.Debugln("events: stream closed")
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}
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}
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