Start working on web server (#2)

* Start working on web server * Some restructure * Serving static works * Fix linter complaint * Enable local dev * Static files served fine * Tidy
2026-03-24 11:48:04 +00:00 · 2022-08-23 13:46:11 +03:00
parent ee89611b81
commit 925cfa77dd
10 changed files with 178 additions and 728 deletions
--- a/pkg/dashboard/api.go
+++ b/pkg/dashboard/api.go
@@ -0,0 +1,55 @@
+package dashboard
+
+import (
+	"embed"
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
+	"net/http"
+	"os"
+	"path"
+)
+
+//go:embed static/*
+var staticFS embed.FS
+
+func newRouter(abortWeb ControlChan, data DataLayer) *gin.Engine {
+	api := gin.Default()
+	fs := http.FS(staticFS)
+
+	// local dev speed-up
+	localDevPath := "pkg/dashboard/static"
+	if _, err := os.Stat(localDevPath); err == nil {
+		log.Warnf("Using local development path to serve static files")
+
+		// the root page
+		api.GET("/", func(c *gin.Context) {
+			c.File(path.Join(localDevPath, "index.html"))
+		})
+
+		// serve a directory called static
+		api.GET("/static/*filepath", func(c *gin.Context) {
+			c.File(path.Join(localDevPath, c.Param("filepath")))
+		})
+	} else {
+		// the root page
+		api.GET("/", func(c *gin.Context) {
+			c.FileFromFS("/static/", fs)
+		})
+
+		// serve a directory called static
+		api.GET("/static/*filepath", func(c *gin.Context) {
+			c.FileFromFS(c.Request.URL.Path, fs)
+		})
+	}
+
+	// server shutdown handler
+	api.DELETE("/", func(c *gin.Context) {
+		abortWeb <- struct{}{}
+	})
+
+	api.GET("/api", func(c *gin.Context) {
+		c.IndentedJSON(http.StatusOK, data.ListInstalled())
+	})
+
+	return api
+}
--- a/pkg/dashboard/main.go
+++ b/pkg/dashboard/main.go
@@ -0,0 +1,16 @@
+package dashboard
+
+import (
+	"helm.sh/helm/v3/pkg/release"
+)
+
+type DataLayer struct {
+}
+
+func (l *DataLayer) CheckConnectivity() {
+	// TODO: check that we can work with context and subcommands
+}
+
+func (l *DataLayer) ListInstalled() []*release.Release {
+	return nil // TODO
+}
--- a/pkg/dashboard/server.go
+++ b/pkg/dashboard/server.go
@@ -0,0 +1,54 @@
+package dashboard
+
+import (
+	"context"
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
+	"net/http"
+	"os"
+	"strings"
+)
+
+func StartServer() (string, ControlChan) {
+	data := DataLayer{}
+	data.CheckConnectivity()
+
+	address := os.Getenv("HD_BIND")
+	if os.Getenv("HD_PORT") == "" {
+		address += ":8080" // TODO: better default port to clash less?
+	} else {
+		address += ":" + os.Getenv("HD_PORT")
+	}
+
+	abort := make(ControlChan)
+	api := newRouter(abort, data)
+	done := startBackgroundServer(address, api, abort)
+
+	if strings.HasPrefix(address, ":") {
+		address = "localhost" + address
+	}
+	return "http://" + address, done
+}
+
+func startBackgroundServer(addr string, routes *gin.Engine, abort ControlChan) ControlChan {
+	done := make(ControlChan)
+	server := &http.Server{Addr: addr, Handler: routes}
+
+	go func() {
+		err := server.ListenAndServe()
+		if err != nil && err != http.ErrServerClosed {
+			panic(err) // TODO: in case of "port busy", check that it's another instance of us and just open browser
+		}
+		done <- struct{}{}
+	}()
+
+	go func() {
+		<-abort
+		err := server.Shutdown(context.Background())
+		if err != nil {
+			log.Warnf("Had problems shutting down the server: %s", err)
+		}
+	}()
+
+	return done
+}
--- a/pkg/dashboard/static/index.html
+++ b/pkg/dashboard/static/index.html
@@ -0,0 +1,19 @@
+<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>Helm Dashboard</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/css/bootstrap.min.css" rel="stylesheet"
+          integrity="sha384-gH2yIJqKdNHPEq0n4Mqa/HGKIhSkIHeL5AyhkYV8i59U5AR6csBvApHHNl/vI1Bx" crossorigin="anonymous">
+    <link href="static/styles.css" rel="stylesheet">
+</head>
+<body>
+
+
+<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/js/bootstrap.bundle.min.js"
+        integrity="sha384-A3rJD856KowSb7dwlZdYEkO39Gagi7vIsF0jrRAoQmDKKtQBHUuLZ9AsSv4jD4Xa"
+        crossorigin="anonymous"></script>
+<script src="static/scripts.js"></script>
+</body>
+</html>
--- a/pkg/dashboard/static/scripts.js
+++ b/pkg/dashboard/static/scripts.js
--- a/pkg/dashboard/static/styles.css
+++ b/pkg/dashboard/static/styles.css
--- a/pkg/dashboard/utils.go
+++ b/pkg/dashboard/utils.go
@@ -0,0 +1,3 @@
+package dashboard
+
+type ControlChan = chan struct{}