110 lines
2.1 KiB
Go
110 lines
2.1 KiB
Go
package api
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import (
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"net/http"
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"sync"
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"time"
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"github.com/gin-gonic/gin"
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"github.com/gorilla/websocket"
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)
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var upgrader = websocket.Upgrader{
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CheckOrigin: func(r *http.Request) bool { return true },
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}
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type LogHub struct {
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mu sync.Mutex
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streams map[string][]chan []byte
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}
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var Hub = &LogHub{
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streams: make(map[string][]chan []byte),
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}
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func (h *LogHub) Broadcast(deploymentID string, p []byte) {
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h.mu.Lock()
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defer h.mu.Unlock()
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if sinks, ok := h.streams[deploymentID]; ok {
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for _, sink := range sinks {
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select {
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case sink <- p:
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default:
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}
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}
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}
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}
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func (h *LogHub) Subscribe(deploymentID string) chan []byte {
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h.mu.Lock()
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defer h.mu.Unlock()
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ch := make(chan []byte, 256)
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h.streams[deploymentID] = append(h.streams[deploymentID], ch)
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return ch
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}
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func (h *LogHub) Unsubscribe(deploymentID string, ch chan []byte) {
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h.mu.Lock()
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defer h.mu.Unlock()
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if sinks, ok := h.streams[deploymentID]; ok {
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for i, sink := range sinks {
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if sink == ch {
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h.streams[deploymentID] = append(sinks[:i], sinks[i+1:]...)
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close(ch)
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break
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}
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}
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if len(h.streams[deploymentID]) == 0 {
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delete(h.streams, deploymentID)
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}
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}
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}
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type StreamWriter struct {
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DeploymentID string
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}
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func (w *StreamWriter) Write(p []byte) (n int, err error) {
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c := make([]byte, len(p))
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copy(c, p)
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Hub.Broadcast(w.DeploymentID, c)
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return len(p), nil
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}
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func (h *Handler) streamDeploymentLogs(c *gin.Context) {
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deploymentID := c.Param("id")
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if deploymentID == "" {
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c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid ID"})
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return
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}
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conn, err := upgrader.Upgrade(c.Writer, c.Request, nil)
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if err != nil {
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return
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}
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defer conn.Close()
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logChan := Hub.Subscribe(deploymentID)
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defer Hub.Unsubscribe(deploymentID, logChan)
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go func() {
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for {
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if _, _, err := conn.NextReader(); err != nil {
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conn.Close()
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return
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}
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}
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}()
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for logChunk := range logChan {
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conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
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if err := conn.WriteMessage(websocket.TextMessage, logChunk); err != nil {
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return
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}
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}
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}
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func (h *Handler) RegisterStreamRoutes(r *gin.Engine) {
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r.GET("/api/deployments/:id/logs/stream", h.streamDeploymentLogs)
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}
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