Lots of changes to merge the Gin/OpenAPI PoC

.gitignore

@@ -1,2 +1,3 @@
 *.exe
-/goja
+/flamenco-poc
+*.gen.go

Makefile

@@ -1,11 +1,11 @@
-OUT := flamenco-goja-poc
+OUT := flamenco-poc
-PKG := stuvel.eu/flamenco-test/goja/cmd/flamenco-goja-poc
+PKG := gitlab.com/blender/flamenco-goja-test
 VERSION := $(shell git describe --tags --dirty --always)
 PKG_LIST := $(shell go list ${PKG}/... | grep -v /vendor/)
 STATIC_OUT := ${OUT}-${VERSION}
 PACKAGE_PATH := dist/${OUT}-${VERSION}
 
-LDFLAGS := -X stuvel.eu/flamenco-test/goja/internal/appinfo.ApplicationVersion=${VERSION}
+LDFLAGS := -X ${PKG}/internal/appinfo.ApplicationVersion=${VERSION}
 BUILD_FLAGS = -ldflags="${LDFLAGS}"
 
 ifndef PACKAGE_PATH
@@ -24,10 +24,8 @@ endif
 all: application
 
 application: ${RESOURCES}
-	go build -v -o ${OUT} ${BUILD_FLAGS} ${PKG}
+	go generate ${PKG}/...
-
+	go build -v -o ${OUT} ${BUILD_FLAGS} ${PKG}/cmd/flamenco-poc
-install: ${RESOURCES}
-	go install -i -v ${BUILD_FLAGS} ${PKG}
 
 resource.syso: resource/thermogui.ico resource/versioninfo.json
 	goversioninfo -icon=resource/thermogui.ico -64 resource/versioninfo.json
@@ -38,8 +36,16 @@ version:
 	@echo "Version: ${VERSION}"
 	@echo "Target : ${OUT}"
 
-embedded:
+list-embedded:
-	@go list -f "{{.EmbedFiles}}" ${PKG}/job_compilers
+	@go list -f '{{printf "%10s" .Name}}: {{.EmbedFiles}}' ${PKG}/...
+
+swagger-ui:
+	git clone --depth 1 https://github.com/swagger-api/swagger-ui.git tmp-swagger-ui
+	rm -rf pkg/api/static/swagger-ui
+	mv tmp-swagger-ui/dist pkg/api/static/swagger-ui
+	rm -rf tmp-swagger-ui
+	@echo
+	@echo 'Now update pkg/api/static/swagger-ui/index.html to have url: "/api/openapi3.json",'
 
 test:
 	go test -short ${PKG_LIST}

cmd/flamenco-goja-poc/main.go

@@ -1,27 +0,0 @@
-package main
-
-import (
-	"time"
-
-	"github.com/mattn/go-colorable"
-	"github.com/rs/zerolog"
-	"github.com/rs/zerolog/log"
-	"stuvel.eu/flamenco-test/goja/internal/appinfo"
-	"stuvel.eu/flamenco-test/goja/internal/job_compilers"
-)
-
-func main() {
-	output := zerolog.ConsoleWriter{Out: colorable.NewColorableStdout(), TimeFormat: time.RFC3339}
-	log.Logger = log.Output(output)
-
-	log.Info().Str("version", appinfo.ApplicationVersion).Msgf("starting %v", appinfo.ApplicationName)
-
-	compiler, err := job_compilers.Load()
-	if err != nil {
-		log.Fatal().Err(err).Msg("error loading job compilers")
-	}
-
-	if err := compiler.Run("simple-blender-render"); err != nil {
-		log.Fatal().Err(err).Msg("error running job compiler")
-	}
-}

cmd/flamenco-poc/main.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"time"
+
+	middleware "github.com/deepmap/oapi-codegen/pkg/gin-middleware"
+	"github.com/getkin/kin-openapi/openapi3"
+	"github.com/gin-gonic/gin"
+	"github.com/mattn/go-colorable"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+	"gitlab.com/blender/flamenco-goja-test/internal/appinfo"
+	"gitlab.com/blender/flamenco-goja-test/internal/job_compilers"
+	"gitlab.com/blender/flamenco-goja-test/pkg/api"
+)
+
+func main() {
+	output := zerolog.ConsoleWriter{Out: colorable.NewColorableStdout(), TimeFormat: time.RFC3339}
+	log.Logger = log.Output(output)
+
+	log.Info().Str("version", appinfo.ApplicationVersion).Msgf("starting %v", appinfo.ApplicationName)
+
+	gojaPoC()
+	ginOpenAPIPoC()
+}
+
+// Proof of concept of job compiler in JavaScript.
+func gojaPoC() {
+	compiler, err := job_compilers.Load()
+	if err != nil {
+		log.Fatal().Err(err).Msg("error loading job compilers")
+	}
+
+	if err := compiler.Run("simple-blender-render"); err != nil {
+		log.Fatal().Err(err).Msg("error running job compiler")
+	}
+}
+
+// Proof of concept of a REST API with Gin and OpenAPI.
+func ginOpenAPIPoC() {
+	listen := ":8080"
+	_, port, _ := net.SplitHostPort(listen)
+	log.Info().Str("port", port).Msg("listening")
+
+	r := gin.Default()
+	r.GET("/ping", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{
+			"message": "pong",
+		})
+	})
+
+	api.RegisterSwaggerUIStaticFiles(r)
+
+	// Adjust the OpenAPI3/Swagger spec to match the port we're listening on.
+	swagger, err := api.GetSwagger()
+	swagger.Servers = []*openapi3.Server{
+		{
+			URL: fmt.Sprintf("http://0.0.0.0:%s/", port),
+		},
+	}
+	if err != nil {
+		log.Fatal().Err(err).Msg("unable to get swagger")
+	}
+	r.GET("/api/openapi3.json", func(c *gin.Context) {
+		c.JSON(http.StatusOK, swagger)
+	})
+
+	r.Use(middleware.OapiRequestValidator(swagger))
+	flamenco := api.NewFlamenco()
+	r = api.RegisterHandlers(r, flamenco)
+
+	finalErr := r.Run(listen)
+	log.Warn().Err(finalErr).Msg("shutting down")
+}

go.mod

@@ -1,10 +1,13 @@
-module stuvel.eu/flamenco-test/goja
+module gitlab.com/blender/flamenco-goja-test
 
 go 1.16
 
 require (
+	github.com/deepmap/oapi-codegen v1.9.0
 	github.com/dop251/goja v0.0.0-20211217115348-3f9136fa235d
 	github.com/dop251/goja_nodejs v0.0.0-20210225215109-d91c329300e7
+	github.com/getkin/kin-openapi v0.88.0
+	github.com/gin-gonic/gin v1.7.7
 	github.com/google/uuid v1.3.0
 	github.com/mattn/go-colorable v0.1.12
 	github.com/rs/zerolog v1.26.1

go.sum

@@ -1,71 +1,215 @@
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internal/appinfo/appinfo.go

@@ -3,7 +3,7 @@ package appinfo
 import "fmt"
 
 // ApplicationName contains the application name.
-const ApplicationName = "Flamenco-NG-Goja-Test"
+const ApplicationName = "Flamenco-NG-PoC"
 
 // ApplicationVersion has the version number, and is set during the build.
 var ApplicationVersion = "set-during-build"

pkg/api/flamenco-manager.yaml

@@ -0,0 +1,127 @@
+openapi: 3.0.0
+info:
+  version: 1.0.0
+  title: Flamenco manager
+  description: Render Farm manager API
+  contact:
+    name: Flamenco Team
+    url: https://flamenco.io/
+  license:
+    name: GPLv3
+    url: https://www.gnu.org/licenses/gpl-3.0.en.html
+servers:
+  - url: http://localhost:8080/
+paths:
+  /register-worker:
+    summary: Registration of new workers
+    post:
+      description: Register a new worker.
+      operationId: registerWorker
+      requestBody:
+        description: Worker to register
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/WorkerRegistration"
+      responses:
+        "200":
+          description: normal response
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/RegisteredWorker"
+        default:
+          description: unexpected error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Error'
+
+  /task:
+    summary: Task scheduler endpoint.
+    post:
+      summary: Obtain a new task to execute.
+      responses:
+        "204":
+          description: No tasks available for this Worker.
+        "200":
+          description: Task to execute.
+          content:
+            application/json:
+              schema: {$ref: "#/components/schemas/AssignedTask"}
+
+components:
+  schemas:
+    WorkerRegistration:
+      type: object
+      required: [secret, platform, supported_task_types, nickname]
+      properties:
+        secret: {type: string}
+        platform: {type: string}
+        supported_task_types:
+          type: array
+          items: {type: string}
+        nickname: {type: string}
+
+    RegisteredWorker:
+      type: object
+      properties:
+        _id: {type: string}
+        nickname: {type: string}
+        address: {type: string}
+        status: {type: string}
+        platform: {type: string}
+        last_activity: {type: string}
+        software: {type: string}
+        supported_task_types:
+          type: array
+          items: {type: string}
+      required: [_id, nickname, address, status, platform, current_task, last_activity, software, supported_task_types]
+
+    AssignedTask:
+      type: object
+      description: AssignedTask is a task as it is received by the Worker.
+      properties:
+        _id: {type: string}
+        job: {type: string}
+        user: {type: string}
+        name: {type: string}
+        status: {$ref: "#/components/schemas/TaskStatus"}
+        priority: {type: integer}
+        job_priority: {type: integer}
+        job_type: {type: string}
+        task_type: {type: string}
+        commands:
+          type: array
+          items: {$ref: "#/components/schemas/Command"}
+      required: [_id, job, user, name, status, priority, job_priority, job_type, task_type, commands]
+
+    JobStatus:
+      type: string
+      enum: [active, canceled, completed, construction-failed, failed, paused, queued, archived, archiving, cancel-requested, fail-requested, requeued, under-construction, waiting-for-files]
+
+    TaskStatus:
+      type: string
+      enum: [active, canceled, completed, failed, queued, soft-failed, cancel-requested, fail-requested, paused, processing]
+
+## Authentication
+
+
+    Command:
+      type: object
+      description: Command represents a single command to execute by the Worker.
+      properties:
+        name: {type: string}
+        settings: {type: object}
+      required: [name, settings]
+
+    Error:
+      type: object
+      required: [code, message]
+      properties:
+        code:
+          type: integer
+          format: int32
+        message:
+          type: string

pkg/api/flamenco.go

@@ -0,0 +1,75 @@
+//go:generate oapi-codegen -generate types -o openapi_types.gen.go -package api flamenco-manager.yaml
+//go:generate oapi-codegen -generate gin   -o openapi_gin.gen.go   -package api flamenco-manager.yaml
+//go:generate oapi-codegen -generate spec  -o openapi_spec.gen.go  -package api flamenco-manager.yaml
+
+package api
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"github.com/rs/zerolog/log"
+)
+
+type Flamenco struct {
+}
+
+var _ ServerInterface = (*Flamenco)(nil)
+
+func NewFlamenco() *Flamenco {
+	return &Flamenco{}
+}
+
+func (f *Flamenco) RegisterWorker(c *gin.Context) {
+	remoteIP, isTrustedProxy := c.RemoteIP()
+
+	logger := log.With().
+		Str("ip", remoteIP.String()).
+		Bool("trustedProxy", isTrustedProxy).
+		Logger()
+
+	var req RegisterWorkerJSONBody
+	err := c.Bind(&req)
+	if err != nil {
+		logger.Warn().Err(err).Msg("bad request received")
+		sendAPIError(c, http.StatusBadRequest, "invalid format")
+		return
+	}
+
+	logger.Info().Str("nickname", req.Nickname).Msg("registering new worker")
+
+	c.JSON(http.StatusOK, &RegisteredWorker{
+		Id:       uuid.New().String(),
+		Nickname: req.Nickname,
+		Platform: req.Platform,
+		Address:  remoteIP.String(),
+	})
+}
+
+func (f *Flamenco) PostTask(c *gin.Context) {
+	c.JSON(http.StatusOK, &AssignedTask{
+		Id: uuid.New().String(),
+		Commands: []Command{
+			{"echo", gin.H{"payload": "Simon says \"Shaders!\""}},
+			{"blender", gin.H{"blender_cmd": "/shared/bin/blender"}},
+		},
+		Job:         uuid.New().String(),
+		JobPriority: 50,
+		JobType:     "blender-render",
+		Name:        "A1032",
+		Priority:    50,
+		Status:      "active",
+		TaskType:    "blender-render",
+	})
+}
+
+// sendPetstoreError wraps sending of an error in the Error format, and
+// handling the failure to marshal that.
+func sendAPIError(c *gin.Context, code int, message string) {
+	petErr := Error{
+		Code:    int32(code),
+		Message: message,
+	}
+	c.JSON(code, petErr)
+}

pkg/api/swagger-ui/index.html

@@ -0,0 +1,61 @@
+<!-- HTML for static distribution bundle build -->
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <title>Swagger UI</title>
+    <link rel="stylesheet" type="text/css" href="./swagger-ui.css" />
+    <link rel="icon" type="image/png" href="./favicon-32x32.png" sizes="32x32" />
+    <link rel="icon" type="image/png" href="./favicon-16x16.png" sizes="16x16" />
+    <style>
+        html {
+            box-sizing: border-box;
+            overflow: -moz-scrollbars-vertical;
+            overflow-y: scroll;
+        }
+        
+        *,
+        *:before,
+        *:after {
+            box-sizing: inherit;
+        }
+        
+        body {
+            margin: 0;
+            background: #fafafa;
+        }
+    </style>
+</head>
+
+<body>
+    <div id="swagger-ui"></div>
+
+    <script src="./swagger-ui-bundle.js" charset="UTF-8">
+    </script>
+    <script src="./swagger-ui-standalone-preset.js" charset="UTF-8">
+    </script>
+    <script>
+        window.onload = function() {
+            // Begin Swagger UI call region
+            const ui = SwaggerUIBundle({
+                url: "/api/openapi3.json",
+                dom_id: '#swagger-ui',
+                deepLinking: true,
+                presets: [
+                    SwaggerUIBundle.presets.apis,
+                    SwaggerUIStandalonePreset
+                ],
+                plugins: [
+                    SwaggerUIBundle.plugins.DownloadUrl
+                ],
+                layout: "StandaloneLayout"
+            });
+            // End Swagger UI call region
+
+            window.ui = ui;
+        };
+    </script>
+</body>
+
+</html>

pkg/api/swagger-ui/oauth2-redirect.html

@@ -0,0 +1,75 @@
+<!doctype html>
+<html lang="en-US">
+<head>
+    <title>Swagger UI: OAuth2 Redirect</title>
+</head>
+<body>
+<script>
+    'use strict';
+    function run () {
+        var oauth2 = window.opener.swaggerUIRedirectOauth2;
+        var sentState = oauth2.state;
+        var redirectUrl = oauth2.redirectUrl;
+        var isValid, qp, arr;
+
+        if (/code|token|error/.test(window.location.hash)) {
+            qp = window.location.hash.substring(1);
+        } else {
+            qp = location.search.substring(1);
+        }
+
+        arr = qp.split("&");
+        arr.forEach(function (v,i,_arr) { _arr[i] = '"' + v.replace('=', '":"') + '"';});
+        qp = qp ? JSON.parse('{' + arr.join() + '}',
+                function (key, value) {
+                    return key === "" ? value : decodeURIComponent(value);
+                }
+        ) : {};
+
+        isValid = qp.state === sentState;
+
+        if ((
+          oauth2.auth.schema.get("flow") === "accessCode" ||
+          oauth2.auth.schema.get("flow") === "authorizationCode" ||
+          oauth2.auth.schema.get("flow") === "authorization_code"
+        ) && !oauth2.auth.code) {
+            if (!isValid) {
+                oauth2.errCb({
+                    authId: oauth2.auth.name,
+                    source: "auth",
+                    level: "warning",
+                    message: "Authorization may be unsafe, passed state was changed in server Passed state wasn't returned from auth server"
+                });
+            }
+
+            if (qp.code) {
+                delete oauth2.state;
+                oauth2.auth.code = qp.code;
+                oauth2.callback({auth: oauth2.auth, redirectUrl: redirectUrl});
+            } else {
+                let oauthErrorMsg;
+                if (qp.error) {
+                    oauthErrorMsg = "["+qp.error+"]: " +
+                        (qp.error_description ? qp.error_description+ ". " : "no accessCode received from the server. ") +
+                        (qp.error_uri ? "More info: "+qp.error_uri : "");
+                }
+
+                oauth2.errCb({
+                    authId: oauth2.auth.name,
+                    source: "auth",
+                    level: "error",
+                    message: oauthErrorMsg || "[Authorization failed]: no accessCode received from the server"
+                });
+            }
+        } else {
+            oauth2.callback({auth: oauth2.auth, token: qp, isValid: isValid, redirectUrl: redirectUrl});
+        }
+        window.close();
+    }
+
+    window.addEventListener('DOMContentLoaded', function () {
+      run();
+    });
+</script>
+</body>
+</html>

pkg/api/swagger_ui.go

@@ -0,0 +1,21 @@
+package api
+
+import (
+	"embed"
+	"io/fs"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/rs/zerolog/log"
+)
+
+//go:embed swagger-ui
+var swaggerUI embed.FS
+
+func RegisterSwaggerUIStaticFiles(router *gin.Engine) {
+	files, err := fs.Sub(swaggerUI, "swagger-ui")
+	if err != nil {
+		log.Fatal().Err(err).Msg("error preparing embedded files for serving over HTTP")
+	}
+	router.StaticFS("/api/swagger-ui/", http.FS(files))
+}