Implemented presign logic for file manager

domain/cache/in_mem_cache.go

@@ -0,0 +1,40 @@
+package cache
+
+import (
+	"errors"
+	"time"
+)
+
+func newInMemCache() Manager {
+	return &inMemCache{make(map[string]inMemEntry)}
+}
+
+type inMemEntry struct {
+	value      string
+	expiration time.Time
+}
+
+type inMemCache struct {
+	entries map[string]inMemEntry
+}
+
+func (i *inMemCache) Set(key, value string, expiration time.Duration) error {
+	i.entries[key] = inMemEntry{
+		value:      value,
+		expiration: time.Now().Add(expiration),
+	}
+	return nil
+}
+func (i *inMemCache) Get(key string) (string, error) {
+	if val, exists := i.entries[key]; exists {
+		if val.expiration.Before(time.Now()) {
+			delete(i.entries, key)
+		} else {
+			return val.value, nil
+		}
+	}
+	return "", errors.New("no value for given key")
+}
+func (i *inMemCache) Remove(key string) {
+	delete(i.entries, key)
+}

domain/cache/redis_cache.go

@@ -2,7 +2,6 @@ package cache
 
 import (
 	"context"
-	"errors"
 	"github.com/go-redis/redis/v8"
 	"os"
 	"time"
@@ -37,37 +36,3 @@ func (r *redisCache) Remove(key string) {
 	defer cancel()
 	r.client.Del(ctx, key)
 }
-
-func newInMemCache() Manager {
-	return &inMemCache{make(map[string]inMemEntry)}
-}
-
-type inMemEntry struct {
-	value      string
-	expiration time.Time
-}
-
-type inMemCache struct {
-	entries map[string]inMemEntry
-}
-
-func (i *inMemCache) Set(key, value string, expiration time.Duration) error {
-	i.entries[key] = inMemEntry{
-		value:      value,
-		expiration: time.Now().Add(expiration),
-	}
-	return nil
-}
-func (i *inMemCache) Get(key string) (string, error) {
-	if val, exists := i.entries[key]; exists {
-		if val.expiration.Before(time.Now()) {
-			delete(i.entries, key)
-		} else {
-			return val.value, nil
-		}
-	}
-	return "", errors.New("no value for given key")
-}
-func (i *inMemCache) Remove(key string) {
-	delete(i.entries, key)
-}

domain/resource/file_manager.go

@@ -0,0 +1,113 @@
+package resource
+
+import (
+	"context"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"resource-manager/domain/cache"
+	"resource-manager/security"
+	"strings"
+	"time"
+)
+
+func newLocalFolder(cacheManager cache.Manager, expiration time.Duration) Manager {
+	path := os.Getenv("LOCAL_PATH_PREFIX")
+	// if path isn't set use local
+	if path == "" {
+		path, _ = os.Getwd()
+	}
+	log.Println("Manager | using path (" + path + ") and expiration of " + expiration.String())
+	manager := fileManager{cacheManager, path, expiration}
+	return &manager
+}
+
+type fileManager struct {
+	cache      cache.Manager
+	path       string
+	expiration time.Duration
+}
+
+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 := 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)
+	if err != nil {
+		log.Println("Manager | failed downloading (" + path + ") cause: " + err.Error())
+	}
+	return
+}
+func (f *fileManager) Presign(_ context.Context, path string) (string, error) {
+	token, err := security.CreateToken(security.PresignToken{Path: path}, f.expiration)
+	if err != nil {
+		return "", err
+	}
+	return "/api/v1/resources?token=" + token, nil
+}
+func (f *fileManager) Copy(from string, to string, overwrite bool) error {
+	fromPath := filepath.Join(f.path, from)
+	toPath := filepath.Join(f.path, to)
+	log.Println("Manager | copying from (" + fromPath + ") to (" + toPath + ")")
+	createFolder(filepath.Join(toPath, "file"))
+	return copyFolder(fromPath, toPath, overwrite)
+}
+func (f *fileManager) Delete(path string) error {
+	log.Println("Manager | deleting " + path)
+	fullPath := filepath.Join(f.path, path)
+	if err := os.Remove(fullPath); err != nil {
+		log.Println("Manager | failed deleting (" + path + ") cause: " + err.Error())
+		return err
+	}
+	f.cache.Remove(path)
+	return nil
+}
+func createFolder(path string) {
+	paths := strings.Split(path, "/")
+	folderPath := "/" + filepath.Join(paths[:len(paths)-1]...)
+	if err := os.MkdirAll(folderPath, 0o755); err != nil {
+		log.Println("[error] ", err)
+	}
+}
+func copyFolder(source, destination string, overwrite bool) error {
+	var err = filepath.WalkDir(source, func(path string, d os.DirEntry, err error) error {
+		relPath := strings.Replace(path, source, "", 1)
+		if relPath == "" {
+			return nil
+		}
+		if d.IsDir() {
+			return os.Mkdir(filepath.Join(destination, relPath), 0755)
+		} else {
+			doesExist := false
+			if _, err := os.Stat(filepath.Join(destination, relPath)); !os.IsNotExist(err) {
+				doesExist = true
+			}
+			if !doesExist || overwrite {
+				var data, err1 = ioutil.ReadFile(filepath.Join(source, relPath))
+				if err1 != nil {
+					return err1
+				}
+				return ioutil.WriteFile(filepath.Join(destination, relPath), data, 0777)
+			} else {
+				return nil
+			}
+		}
+	})
+	return err
+}

domain/resource/manager.go

@@ -22,6 +22,7 @@ func NewManager(cacheManager cache.Manager, expiration time.Duration) Manager {
 		log.Println("Manager | using S3 for data storage")
 		return newS3Bucket(cacheManager, expiration)
 	} else {
+		log.Println("Manager | using local file for data storage")
 		return newLocalFolder(cacheManager, expiration)
 	}
 }

domain/resource/s3_manager.go

@@ -8,11 +8,9 @@ import (
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/s3"
 	"github.com/aws/aws-sdk-go/service/s3/s3manager"
-	"io/ioutil"
 	"log"
 	"net/url"
 	"os"
-	"path/filepath"
 	"resource-manager/domain/cache"
 	"strconv"
 	"strings"
@@ -20,101 +18,6 @@ import (
 	"time"
 )
 
-func newLocalFolder(cacheManager cache.Manager, expiration time.Duration) Manager {
-	path := os.Getenv("UPLOAD_PATH")
-	// if path isn't set use local
-	if path == "" {
-		path, _ = os.Getwd()
-	}
-	log.Println("Manager | using local file system for data storage (" + path + ")")
-	manager := fileManager{cacheManager, path}
-	return &manager
-}
-
-type fileManager struct {
-	cache cache.Manager
-	path  string
-}
-
-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 := 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)
-	if err != nil {
-		log.Println("Manager | failed downloading (" + path + ") cause: " + err.Error())
-	}
-	return
-}
-func (f *fileManager) Presign(_ context.Context, path string) (string, error) {
-	return "/api/v1/get?path=" + path, nil
-}
-func (f *fileManager) Copy(from string, to string, overwrite bool) error {
-	fromPath := filepath.Join(f.path, from)
-	toPath := filepath.Join(f.path, to)
-	log.Println("Manager | copying from (" + fromPath + ") to (" + toPath + ")")
-	createFolder(filepath.Join(toPath, "file"))
-	return copyFolder(fromPath, toPath, overwrite)
-}
-func (f *fileManager) Delete(path string) error {
-	log.Println("Manager | deleting " + path)
-	fullPath := filepath.Join(f.path, path)
-	if err := os.Remove(fullPath); err != nil {
-		log.Println("Manager | failed deleting (" + path + ") cause: " + err.Error())
-		return err
-	}
-	f.cache.Remove(path)
-	return nil
-}
-func createFolder(path string) {
-	paths := strings.Split(path, "/")
-	folderPath := "/" + filepath.Join(paths[:len(paths)-1]...)
-	if err := os.MkdirAll(folderPath, 0o755); err != nil {
-		log.Println("[error] ", err)
-	}
-}
-func copyFolder(source, destination string, overwrite bool) error {
-	var err = filepath.WalkDir(source, func(path string, d os.DirEntry, err error) error {
-		relPath := strings.Replace(path, source, "", 1)
-		if relPath == "" {
-			return nil
-		}
-		if d.IsDir() {
-			return os.Mkdir(filepath.Join(destination, relPath), 0755)
-		} else {
-			doesExist := false
-			if _, err := os.Stat(filepath.Join(destination, relPath)); !os.IsNotExist(err) {
-				doesExist = true
-			}
-			if !doesExist || overwrite {
-				var data, err1 = ioutil.ReadFile(filepath.Join(source, relPath))
-				if err1 != nil {
-					return err1
-				}
-				return ioutil.WriteFile(filepath.Join(destination, relPath), data, 0777)
-			} else {
-				return nil
-			}
-		}
-	})
-	return err
-}
-
 func newS3Bucket(cacheManager cache.Manager, expiration time.Duration) Manager {
 	sess, err := session.NewSession(&aws.Config{
 		Region: aws.String(os.Getenv("AWS_REGION_NAME"))},