127 lines
2.9 KiB
Go
127 lines
2.9 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 events
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import (
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"context"
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"encoding/json"
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"io"
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"net/http"
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"strconv"
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"time"
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"github.com/drone/drone/core"
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"github.com/drone/drone/handler/api/render"
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"github.com/go-chi/chi"
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)
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// HandleLogStream creates an http.HandlerFunc that streams builds logs
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// to the http.Response in an event stream format.
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func HandleLogStream(
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repos core.RepositoryStore,
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builds core.BuildStore,
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stages core.StageStore,
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steps core.StepStore,
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stream core.LogStream,
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) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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var (
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namespace = chi.URLParam(r, "owner")
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name = chi.URLParam(r, "name")
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)
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number, err := strconv.ParseInt(chi.URLParam(r, "number"), 10, 64)
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if err != nil {
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render.BadRequest(w, err)
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return
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}
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stageNumber, err := strconv.Atoi(chi.URLParam(r, "stage"))
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if err != nil {
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render.BadRequest(w, err)
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return
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}
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stepNumber, err := strconv.Atoi(chi.URLParam(r, "step"))
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if err != nil {
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render.BadRequest(w, err)
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return
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}
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repo, err := repos.FindName(r.Context(), namespace, name)
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if err != nil {
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render.NotFound(w, err)
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return
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}
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build, err := builds.FindNumber(r.Context(), repo.ID, number)
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if err != nil {
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render.NotFound(w, err)
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return
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}
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stage, err := stages.FindNumber(r.Context(), build.ID, stageNumber)
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if err != nil {
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render.NotFound(w, err)
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return
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}
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step, err := steps.FindNumber(r.Context(), stage.ID, stepNumber)
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if err != nil {
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render.NotFound(w, err)
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return
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}
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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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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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enc := json.NewEncoder(w)
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linec, errc := stream.Tail(ctx, step.ID)
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if errc == nil {
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io.WriteString(w, "event: error\ndata: eof\n\n")
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return
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}
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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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break L
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case <-errc:
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break L
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case <-time.After(time.Hour):
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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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case line := <-linec:
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io.WriteString(w, "data: ")
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enc.Encode(line)
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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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io.WriteString(w, "event: error\ndata: eof\n\n")
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f.Flush()
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}
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}
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