Refactor

.gitignore

@@ -1 +1,2 @@
 resource_manager
+.idea/

api/api.go

@@ -0,0 +1,179 @@
+package api
+
+import (
+	"bytes"
+	"encoding/base64"
+	"git.bbr-dev.info/brajkovic/resource_manager/domain/resize"
+	"git.bbr-dev.info/brajkovic/resource_manager/domain/resource"
+	"github.com/gin-gonic/gin"
+	"log"
+	"net/http"
+	"strings"
+	"time"
+)
+
+type UploadRequest struct {
+	Content    string `json:"content"`
+	Path       string `json:"path"`
+	Properties struct {
+		Overwrite bool   `json:"overwrite"`
+		MimeType  string `json:"mimeType"`
+	} `json:"properties"`
+	Resize *struct {
+		Width  int    `json:"width"`
+		Height int    `json:"height"`
+		Type   string `json:"type"`
+	} `json:"resize"`
+}
+
+func NoMethod() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.JSON(http.StatusNotFound, gin.H{
+			"status":  404,
+			"created": time.Now(),
+			"message": "no handler for method '" + c.Request.Method + "'",
+		})
+	}
+}
+
+func NoRoute() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.JSON(http.StatusNotFound, gin.H{
+			"status":  404,
+			"created": time.Now(),
+			"message": "no handler for " + c.Request.Method + " '" + c.Request.URL.RequestURI() + "'",
+		})
+	}
+}
+
+func HandleUpload(resourceManager resource.Manager) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		var request UploadRequest
+		if err := c.BindJSON(&request); err != nil {
+			c.AbortWithStatusJSON(400, gin.H{"error": "bad request"})
+			return
+		}
+		content, err := base64.StdEncoding.DecodeString(request.Content)
+		if err != nil {
+			c.AbortWithStatusJSON(400, gin.H{"error": "bad request"})
+			return
+		}
+		if resize.IsResizable(readMimeType(request.Path, request.Properties.MimeType)) && request.Resize != nil {
+			content, err = resize.ResizeImage(content, resize.Resize{
+				Height: request.Resize.Height,
+				Width:  request.Resize.Width,
+				Type:   mapResizeType(request.Resize.Type),
+			})
+			if err != nil {
+				c.AbortWithStatusJSON(400, gin.H{"error": "bad request"})
+				return
+			}
+		}
+		resourceManager.Upload(resource.UploadRequest{
+			Buffer:    bytes.NewBuffer(content),
+			Path:      request.Path,
+			MimeType:  request.Properties.MimeType,
+			Overwrite: request.Properties.Overwrite,
+		})
+		// we return this as success
+		c.Status(http.StatusNoContent)
+	}
+}
+
+func HandleCopy(resourceManager resource.Manager) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		from := c.Query("from")
+		to := c.Query("to")
+		overwrite := c.Query("overwrite") == "true"
+		if err := resourceManager.Copy(from, to, overwrite); err != nil {
+			log.Println(err)
+			c.AbortWithStatus(500)
+		} else {
+			c.Status(201)
+		}
+
+	}
+}
+
+func HandlePresign(resourceManager resource.Manager) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		path := c.Query("path")
+		url, err := resourceManager.Presign(c, path)
+		if err != nil {
+			c.AbortWithStatus(404)
+			return
+		}
+		if c.Query("redirect") == "true" {
+			c.Redirect(http.StatusTemporaryRedirect, url)
+		} else {
+			c.JSON(200, gin.H{"url": url})
+		}
+	}
+}
+
+func HandleDownload(resourceManager resource.Manager) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		path := c.Query("path")
+		data, err := resourceManager.Download(c, path)
+		if err == nil {
+			c.Header("content-disposition", "inline; filename=\""+filename(path)+"\"")
+			c.Data(200, readMimeType(path, ""), data)
+		} else {
+			c.AbortWithStatus(http.StatusNotFound)
+		}
+	}
+}
+
+func HandleDelete(resourceManager resource.Manager) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		path := c.Query("path")
+		if err := resourceManager.Delete(path); err != nil {
+			c.AbortWithError(400, err)
+		} else {
+			c.Status(204)
+		}
+	}
+}
+
+var mimeTypes = map[string]string{
+	"jpg":  "image/jpg",
+	"jpeg": "image/jpeg",
+	"png":  "image/png",
+	"gif":  "image/gif",
+	"json": "application/json",
+	"pdf":  "application/pdf",
+	"html": "text/html",
+	"xml":  "application/xml",
+}
+
+func readMimeType(path string, mimeType string) string {
+	if mimeType != "" {
+		return mimeType
+	}
+	parts := strings.Split(path, ".")
+	fileType := strings.ToLower(parts[len(parts)-1])
+	if value, exists := mimeTypes[fileType]; exists {
+		return value
+	}
+	return "application/octet-stream"
+}
+
+func mapResizeType(resizeType string) resize.ResizeType {
+	switch resizeType {
+	case "cover":
+		return resize.Cover
+	case "contain":
+		return resize.Contain
+	case "exact_height":
+		return resize.ExactHeight
+	case "exact_width":
+		return resize.ExactWidth
+	default:
+		return resize.Exact
+	}
+}
+
+func filename(path string) string {
+	substrings := strings.Split(path, "/")
+	return substrings[len(substrings)-1]
+}

api/routes.go

@@ -0,0 +1,50 @@
+package api
+
+import (
+	"git.bbr-dev.info/brajkovic/resource_manager/domain/cache"
+	"git.bbr-dev.info/brajkovic/resource_manager/domain/resource"
+	"github.com/gin-gonic/gin"
+	"log"
+	"os"
+	"time"
+)
+
+func SetupServer() *gin.Engine {
+	server := createServer()
+	RegisterRoutes(server)
+	return server
+}
+
+func createServer() *gin.Engine {
+	server := gin.New()
+	server.NoRoute(NoRoute())
+	server.NoMethod(NoMethod())
+	server.Use(gin.Recovery())
+	return server
+}
+
+func RegisterRoutes(server *gin.Engine) {
+	cacheManager := cache.NewManager()
+	expiration := loadExpiration()
+
+	log.Println("Presign | expiration set to " + expiration.String())
+
+	resourceManager := resource.NewManager(cacheManager, expiration)
+
+	server.POST("/api/v1/upload", HandleUpload(resourceManager))
+	server.GET("/api/v1/download", HandleDownload(resourceManager))
+	server.GET("/api/v1/presign", HandlePresign(resourceManager))
+	server.PUT("/api/v1/copy", HandleCopy(resourceManager))
+	server.DELETE("/api/v1/delete", HandleDelete(resourceManager))
+}
+
+func loadExpiration() time.Duration {
+	if value := os.Getenv("PRESIGN_DURATION"); value != "" {
+		duration, err := time.ParseDuration(value)
+		if err != nil {
+			return duration
+		}
+	}
+	// default duration
+	return 1 * time.Hour
+}

domain/resize/resize.go

@@ -0,0 +1,105 @@
+package resize
+
+import (
+	"bytes"
+	"github.com/anthonynsimon/bild/transform"
+	"image"
+	"image/jpeg"
+	"image/png"
+	"io"
+)
+
+var mimeTypes = map[string]string{
+	"image/jpg":  "image/jpg",
+	"image/jpeg": "image/jpeg",
+	"image/png":  "image/png",
+}
+
+func IsResizable(mimeType string) bool {
+	_, present := mimeTypes[mimeType]
+	return present
+}
+
+type ResizeType int
+
+const (
+	// Cover - resize preserving image aspect
+	//       - resizes to the smallest image where both width and height are larger or equal to given size
+	Cover ResizeType = iota
+	// Contain - resize preserving image aspect
+	//       - resizes to the largest image where both width and height are smaller or equal to given size
+	Contain ResizeType = iota
+	// ExactHeight - resize preserving image aspect
+	//       - resizes to the image with given height
+	ExactHeight ResizeType = iota
+	// ExactWidth - resize preserving image aspect
+	//       - resizes to the image with given width
+	ExactWidth ResizeType = iota
+	// Exact - resize without preserving image aspect
+	//       - resizes to exact size defined in request
+	Exact ResizeType = iota
+)
+
+type Resize struct {
+	Height int
+	Width  int
+	Type   ResizeType
+}
+
+func ResizeImage(imageBytes []byte, resize Resize) ([]byte, error) {
+	img, format, err := image.Decode(bytes.NewReader(imageBytes))
+	if err != nil {
+		return nil, err
+	}
+	var buffer bytes.Buffer
+	writer := io.Writer(&buffer)
+
+	resizeWidth, resizeHeight := calculateResizedDimensions(img.Bounds(), resize)
+
+	img = transform.Resize(img, resizeWidth, resizeHeight, transform.Gaussian)
+	switch format {
+	case "png":
+		err = png.Encode(writer, img)
+	case "jpeg":
+		err = jpeg.Encode(writer, img, nil)
+	default:
+		err = jpeg.Encode(writer, img, nil)
+	}
+	if err != nil {
+		return nil, err
+	}
+	return buffer.Bytes(), nil
+}
+
+func calculateResizedDimensions(bounds image.Rectangle, resize Resize) (width int, height int) {
+	width = bounds.Dx()
+	height = bounds.Dy()
+
+	switch resize.Type {
+	case Cover:
+		rWidth := resize.Height * width / height
+		if rWidth >= resize.Width {
+			return rWidth, resize.Height
+		}
+		rHeight := resize.Width * height / width
+		if rHeight >= resize.Height {
+			return resize.Width, rHeight
+		}
+	case Contain:
+		rWidth := resize.Height * width / height
+		if rWidth <= resize.Width {
+			return rWidth, resize.Height
+		}
+		rHeight := resize.Width * height / width
+		if rHeight <= resize.Height {
+			return resize.Width, rHeight
+		}
+	case ExactHeight:
+		rWidth := resize.Height * width / height
+		return rWidth, resize.Height
+	case ExactWidth:
+		rHeight := resize.Width * height / width
+		return resize.Width, rHeight
+	}
+	return
+}

domain/resource/impl.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"context"
 	"errors"
-	"git.bbr-dev.info/brajkovic/resource_manager/cache"
+	"git.bbr-dev.info/brajkovic/resource_manager/domain/cache"
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/s3"
@@ -39,11 +39,20 @@ type fileManager struct {
 func (f *fileManager) Upload(request UploadRequest) {
 	fullPath := filepath.Join(f.path, request.Path)
 	createFolder(fullPath)
+	if checkFileExists(fullPath) && !request.Overwrite {
+		log.Println("Manager | cannot upload file as file on same path already exists")
+		return
+	}
 	log.Println("Manager | uploading to (" + request.Path + ")")
-	if err := ioutil.WriteFile(fullPath, request.Buffer.Bytes(), 0o644); err != nil {
+	if err := os.WriteFile(fullPath, request.Buffer.Bytes(), 0o644); err != nil {
 		log.Println("Manager | failed uploading (" + request.Path + ") cause: " + err.Error())
 	}
 }
+
+func checkFileExists(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil
+}
 func (f *fileManager) Download(ctx context.Context, path string) (file []byte, err error) {
 	fullPath := filepath.Join(f.path, path)
 	file, err = ioutil.ReadFile(fullPath)

domain/resource/manager.go

@@ -3,7 +3,7 @@ package resource
 import (
 	"bytes"
 	"context"
-	"git.bbr-dev.info/brajkovic/resource_manager/cache"
+	"git.bbr-dev.info/brajkovic/resource_manager/domain/cache"
 	"log"
 	"os"
 	"strings"

handlers.go

@@ -1,109 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"encoding/base64"
-	"git.bbr-dev.info/brajkovic/resource_manager/resource"
-	"github.com/gin-gonic/gin"
-	"log"
-	"net/http"
-	"strings"
-)
-
-type LegacySave struct {
-	Content    string `json:"content"`
-	Path       string `json:"path"`
-	Properties struct {
-		Height    int    `json:"height"`
-		Overwrite bool   `json:"overwrite"`
-		MimeType  string `json:"mimeType"`
-	} `json:"properties"`
-}
-
-func HandleLegacySave(resourceManager resource.Manager) gin.HandlerFunc {
-	return func(c *gin.Context) {
-		var legacySave LegacySave
-		if err := c.ShouldBindJSON(&legacySave); err == nil {
-			// removing image/(png/jpeg/...); start
-			if strings.HasPrefix(legacySave.Content, "data:") {
-				legacySave.Content = strings.Split(legacySave.Content, ";")[1]
-			}
-			if imageBytes, err := base64.StdEncoding.DecodeString(legacySave.Content); err == nil {
-				if legacySave.Properties.Height > 0 {
-					imageBytes, err = resizeImage(imageBytes, legacySave.Properties.Height)
-				}
-				mimeType := readMimeType(legacySave.Path, legacySave.Properties.MimeType)
-				if err == nil {
-					// request is sent to uplader service after which it is being uploaded
-					resourceManager.Upload(resource.UploadRequest{
-						Buffer:   bytes.NewBuffer(imageBytes),
-						Path:     legacySave.Path,
-						MimeType: mimeType,
-					})
-					// we return this as success
-					c.Status(http.StatusNoContent)
-				} else {
-					c.AbortWithStatusJSON(400, gin.H{"error": "bad request"})
-				}
-			} else {
-				c.AbortWithStatusJSON(400, gin.H{"error": "bad request"})
-			}
-		} else {
-			c.AbortWithStatusJSON(400, gin.H{"error": "bad request"})
-		}
-	}
-}
-
-func HandleCopy(resourceManager resource.Manager) gin.HandlerFunc {
-	return func(c *gin.Context) {
-		from := c.Query("from")
-		to := c.Query("to")
-		overwrite := c.Query("overwrite") == "true"
-		if err := resourceManager.Copy(from, to, overwrite); err != nil {
-			log.Println(err)
-			c.AbortWithStatus(500)
-		} else {
-			c.Status(201)
-		}
-
-	}
-}
-
-func HandlePresign(resourceManager resource.Manager) gin.HandlerFunc {
-	return func(c *gin.Context) {
-		path := c.Query("path")
-		url, err := resourceManager.Presign(c, path)
-		if err != nil {
-			c.AbortWithStatus(404)
-			return
-		}
-		if c.Query("redirect") == "true" {
-			c.Redirect(http.StatusTemporaryRedirect, url)
-		} else {
-			c.JSON(200, url)
-		}
-	}
-}
-
-func HandleGet(resourceManager resource.Manager) gin.HandlerFunc {
-	return func(c *gin.Context) {
-		path := c.Query("path")
-		data, err := resourceManager.Download(c, path)
-		if err == nil {
-			c.Data(200, readMimeType(path, ""), data)
-		} else {
-			c.AbortWithStatus(http.StatusNotFound)
-		}
-	}
-}
-
-func HandleDelete(resourceManager resource.Manager) gin.HandlerFunc {
-	return func(c *gin.Context) {
-		path := c.Query("path")
-		if err := resourceManager.Delete(path); err != nil {
-			c.AbortWithError(400, err)
-		} else {
-			c.Status(204)
-		}
-	}
-}

image.go

@@ -1,57 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"github.com/anthonynsimon/bild/transform"
-	"image"
-	"image/jpeg"
-	"image/png"
-	"io"
-	"strings"
-)
-
-var mimeTypes = map[string]string{
-	"jpg":  "image/jpg",
-	"jpeg": "image/jpeg",
-	"png":  "image/png",
-	"json": "application/json",
-	"html": "text/html",
-	"xml":  "application/xml",
-}
-
-func readMimeType(path string, mimeType string) string {
-	if mimeType != "" {
-		return mimeType
-	}
-	parts := strings.Split(path, ".")
-	fileType := parts[len(parts)-1]
-	if value, exists := mimeTypes[fileType]; exists {
-		return value
-	}
-	return "application/octet-stream"
-}
-
-func resizeImage(imageBytes []byte, resizeHeight int) ([]byte, error) {
-	img, format, err := image.Decode(bytes.NewReader(imageBytes))
-	if err != nil {
-		return nil, err
-	}
-	var buffer bytes.Buffer
-	writer := io.Writer(&buffer)
-	resizeWidth := img.Bounds().Dx() * resizeHeight / img.Bounds().Dy()
-	img = transform.Resize(img, resizeWidth, resizeHeight, transform.Gaussian)
-	switch format {
-	case "png":
-		err = png.Encode(writer, img)
-		break
-	case "jpeg":
-		err = jpeg.Encode(writer, img, nil)
-		break
-	default:
-		err = jpeg.Encode(writer, img, nil)
-	}
-	if err != nil {
-		return nil, err
-	}
-	return buffer.Bytes(), nil
-}

main.go

@@ -1,15 +1,10 @@
 package main
 
 import (
-	"git.bbr-dev.info/brajkovic/resource_manager/cache"
-	"git.bbr-dev.info/brajkovic/resource_manager/resource"
-	"github.com/gin-gonic/gin"
+	"git.bbr-dev.info/brajkovic/resource_manager/api"
 	"github.com/joho/godotenv"
 	"log"
 	"net/http"
-	"os"
-	"strings"
-	"time"
 )
 
 func init() {
@@ -18,42 +13,6 @@ func init() {
 }
 
 func main() {
-	cacheManager := cache.NewManager()
-	expiration := loadExpiration()
-	log.Println("Presign | expiration set to " + expiration.String())
-
-	resourceManager := resource.NewManager(cacheManager, expiration)
-
-	server := gin.Default()
-	if strings.Contains(os.Getenv("PROFILE"), "legacy") {
-		setupLegacyEndpoints(server, resourceManager)
-	}
-	setupV1Endpoints(server, resourceManager)
+	server := api.SetupServer()
 	log.Fatalln(http.ListenAndServe(":5201", server))
 }
-
-func loadExpiration() time.Duration {
-	if value := os.Getenv("PRESIGN_DURATION"); value != "" {
-		duration, err := time.ParseDuration(value)
-		if err != nil {
-			return duration
-		}
-	}
-	// default duration
-	return 1 * time.Hour
-}
-
-func setupLegacyEndpoints(server *gin.Engine, resourceManager resource.Manager) {
-	server.POST("/save", HandleLegacySave(resourceManager))
-	server.GET("/get", HandleGet(resourceManager))
-	server.GET("/presign", HandlePresign(resourceManager))
-	server.PUT("/copy", HandleCopy(resourceManager))
-}
-
-func setupV1Endpoints(server *gin.Engine, resourceManager resource.Manager) {
-	server.POST("/api/v1/save", HandleLegacySave(resourceManager))
-	server.GET("/api/v1/get", HandleGet(resourceManager))
-	server.GET("/api/v1/presign", HandlePresign(resourceManager))
-	server.PUT("/api/v1/copy", HandleCopy(resourceManager))
-	server.DELETE("/api/v1/delete", HandleDelete(resourceManager))
-}