mirror of
https://github.com/harness/drone.git
synced 2025-05-04 23:22:42 +08:00
119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
// Copyright 2022 Harness Inc. All rights reserved.
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// Use of this source code is governed by the Polyform Free Trial License
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// that can be found in the LICENSE.md file for this repository.
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package logs
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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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"time"
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"github.com/harness/gitness/internal/api/controller/logs"
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"github.com/harness/gitness/internal/api/render"
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"github.com/harness/gitness/internal/api/request"
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"github.com/harness/gitness/internal/paths"
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"github.com/rs/zerolog/log"
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)
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var (
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pingInterval = 30 * time.Second
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tailMaxTime = 1 * time.Hour
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)
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func HandleTail(logCtrl *logs.Controller) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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session, _ := request.AuthSessionFrom(ctx)
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pipelineRef, err := request.GetPipelineRefFromPath(r)
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if err != nil {
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render.TranslatedUserError(w, err)
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return
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}
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executionNum, err := request.GetExecutionNumberFromPath(r)
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if err != nil {
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render.TranslatedUserError(w, err)
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return
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}
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stageNum, err := request.GetStageNumberFromPath(r)
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if err != nil {
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render.TranslatedUserError(w, err)
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return
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}
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stepNum, err := request.GetStepNumberFromPath(r)
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if err != nil {
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render.TranslatedUserError(w, err)
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return
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}
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spaceRef, pipelineUID, err := paths.DisectLeaf(pipelineRef)
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if err != nil {
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render.TranslatedUserError(w, err)
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return
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}
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f, ok := w.(http.Flusher)
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if !ok {
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log.Error().Msg("http writer type assertion failed")
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render.InternalError(w)
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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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linec, errc, err := logCtrl.Tail(
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ctx, session, spaceRef, pipelineUID,
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executionNum, int(stageNum), int(stepNum))
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if err != nil {
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render.TranslatedUserError(w, err)
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return
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}
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// could not get error channel
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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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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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h.Set("Access-Control-Allow-Origin", "*")
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ctx, cancel := context.WithTimeout(r.Context(), tailMaxTime)
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defer cancel()
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enc := json.NewEncoder(w)
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msgDelayTimer := time.NewTimer(pingInterval) // if time b/w messages takes longer, send a ping
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defer msgDelayTimer.Stop()
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L:
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for {
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msgDelayTimer.Reset(pingInterval)
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select {
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case <-ctx.Done():
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break L
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case err := <-errc:
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log.Err(err).Msg("received error in the tail channel")
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break L
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case <-msgDelayTimer.C:
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io.WriteString(w, ": ping\n\n")
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f.Flush()
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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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