all: add cmd/code2img

Author: changkun

.gitignore

@@ -15,5 +15,4 @@
 # vendor/
 data/code/*.go
 data/images/*.png
-code2img
-.idea
+

cmd/code2img/main.go

@@ -0,0 +1,81 @@
+// Copyright 2021 The golang.design Initiative authors.
+// All rights reserved. Use of this source code is governed
+// by a GNU GPL-3.0 license that can be found in the LICENSE file.
+//
+// Written by Changkun Ou <changkun.de>
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"golang.design/x/code2img"
+)
+
+func main() {
+	router := gin.Default()
+	router.Static("/api/v1/code2img/data/code", "./data/code")
+	router.Static("/api/v1/code2img/data/images", "./data/images")
+	router.POST("/api/v1/code2img", func(c *gin.Context) {
+		b := struct {
+			Code string `json:"code"`
+		}{}
+		if err := c.ShouldBindJSON(&b); err != nil {
+			c.String(http.StatusBadRequest, fmt.Sprintf("Error: %s", err))
+			return
+		}
+		id := uuid.New().String()
+		gofile := "./data/code/" + id + ".go"
+
+		err := ioutil.WriteFile(gofile, []byte(b.Code), os.ModePerm)
+		if err != nil {
+			log.Printf("[%s]: write file error %v", gofile, err)
+			c.String(http.StatusBadRequest, fmt.Sprintf("Error: %s", err))
+			return
+		}
+
+		ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
+		defer cancel()
+
+		buf, err := code2img.Render(ctx, b.Code)
+		if err != nil {
+			c.String(http.StatusBadRequest, fmt.Sprintf("Error: %s", err))
+			return
+		}
+		imgfile := "./data/images/" + id + ".png"
+		if err := ioutil.WriteFile(imgfile, buf, os.ModePerm); err != nil {
+			log.Printf("[%s]: write screenshot error %v", imgfile, err)
+			return
+		}
+		c.String(http.StatusOK, "https://golang.design/api/v1/code2img/data/images/"+id+".png")
+	})
+
+	s := &http.Server{Addr: ":8080", Handler: router}
+	go func() {
+		if err := s.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("listen: %s\n", err)
+		}
+	}()
+
+	quit := make(chan os.Signal)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+	log.Println("shutting down...")
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	if err := s.Shutdown(ctx); err != nil {
+		log.Fatal("forced to shutdown: ", err)
+	}
+	log.Println("server exiting, good bye!")
+}

go.mod

@@ -6,5 +6,5 @@ require (
 	github.com/chromedp/cdproto v0.0.0-20200116234248-4da64dd111ac
 	github.com/chromedp/chromedp v0.5.3
 	github.com/gin-gonic/gin v1.6.3
-	github.com/google/uuid v1.1.2
+	github.com/google/uuid v1.2.0
 )

go.sum

@@ -26,8 +26,8 @@ github.com/gobwas/ws v1.0.2/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/E
 github.com/golang/protobuf v1.3.3 h1:gyjaxf+svBWX08ZjK86iN9geUJF0H6gp2IRKX6Nf6/I=
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
-github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
-github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.2.0 h1:qJYtXnJRWmpe7m/3XlyhrsLrEURqHRM2kxzoxXqyUDs=
+github.com/google/uuid v1.2.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/json-iterator/go v1.1.9 h1:9yzud/Ht36ygwatGx56VwCZtlI/2AD15T1X2sjSuGns=
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/knq/sysutil v0.0.0-20191005231841-15668db23d08 h1:V0an7KRw92wmJysvFvtqtKMAPmvS5O0jtB0nYo6t+gs=

vendor/github.com/google/uuid/hash.go

@@ -78,7 +78,7 @@ github.com/gobwas/ws
 github.com/gobwas/ws/wsutil
 # github.com/golang/protobuf v1.3.3
 github.com/golang/protobuf/proto
-# github.com/google/uuid v1.1.2
+# github.com/google/uuid v1.2.0
 ## explicit
 github.com/google/uuid
 # github.com/json-iterator/go v1.1.9