commit 4929147587498be7c276261547efcb9578ba5e6a Author: Borna Rajkovic Date: Thu Nov 18 19:17:43 2021 +0100 Initial commit diff --git a/cache/impl.go b/cache/impl.go new file mode 100644 index 0000000..8148f79 --- /dev/null +++ b/cache/impl.go @@ -0,0 +1,73 @@ +package cache + +import ( + "context" + "errors" + "github.com/go-redis/redis/v8" + "os" + "time" +) + +func newRedisCache() Manager { + redisClient := redis.NewClient(&redis.Options{ + Addr: os.Getenv("REDIS_URL"), + Username: os.Getenv("REDIS_USERNAME"), + Password: os.Getenv("REDIS_PASSWORD"), + }) + return &redisCache{redisClient} +} + +type redisCache struct { + client *redis.Client +} + +func (r *redisCache) Set(key, value string, expiration time.Duration) error { + ctx, cancel := context.WithTimeout(context.Background(), 1 * time.Second) + defer cancel() + return r.client.Set(ctx, key, value, expiration).Err() +} +func (r *redisCache) Get(key string) (string, error) { + ctx, cancel := context.WithTimeout(context.Background(), 1 * time.Second) + defer cancel() + cacheValue := r.client.Get(ctx, key) + return cacheValue.Val(), cacheValue.Err() +} +func (r *redisCache) Remove(key string) { + ctx, cancel := context.WithTimeout(context.Background(), 1 * time.Second) + 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) +} diff --git a/cache/manager.go b/cache/manager.go new file mode 100644 index 0000000..d9677f6 --- /dev/null +++ b/cache/manager.go @@ -0,0 +1,22 @@ +package cache + +import ( + "os" + "strings" + "time" +) + +func NewManager() Manager { + if strings.Contains(os.Getenv("PROFILE"), "redis") { + return newRedisCache() + } else { + return newInMemCache() + } +} + +type Manager interface { + Set(key, value string, expiration time.Duration) error + Get(key string) (string, error) + Remove(key string) +} + diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..6d5cfcb --- /dev/null +++ b/go.mod @@ -0,0 +1,33 @@ +module resource_manager + +go 1.17 + +require ( + github.com/anthonynsimon/bild v0.13.0 // indirect + github.com/aws/aws-sdk-go v1.42.7 // indirect + github.com/cespare/xxhash/v2 v2.1.2 // indirect + github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect + github.com/gin-contrib/sse v0.1.0 // indirect + github.com/gin-gonic/gin v1.7.4 // indirect + github.com/go-playground/locales v0.13.0 // indirect + github.com/go-playground/universal-translator v0.17.0 // indirect + github.com/go-playground/validator/v10 v10.4.1 // indirect + github.com/go-redis/redis/v8 v8.11.4 // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/inconshreveable/mousetrap v1.0.0 // indirect + github.com/jmespath/go-jmespath v0.4.0 // indirect + github.com/joho/godotenv v1.4.0 // indirect + github.com/json-iterator/go v1.1.9 // indirect + github.com/leodido/go-urn v1.2.0 // indirect + github.com/mattn/go-isatty v0.0.12 // indirect + github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect + github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 // indirect + github.com/spf13/cobra v0.0.5 // indirect + github.com/spf13/pflag v1.0.3 // indirect + github.com/ugorji/go/codec v1.1.7 // indirect + golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 // indirect + golang.org/x/image v0.0.0-20190703141733-d6a02ce849c9 // indirect + golang.org/x/sys v0.0.0-20210423082822-04245dca01da // indirect + google.golang.org/protobuf v1.26.0 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..9f89301 --- /dev/null +++ b/go.sum @@ -0,0 +1,165 @@ +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/anthonynsimon/bild v0.13.0 h1:mN3tMaNds1wBWi1BrJq0ipDBhpkooYfu7ZFSMhXt1C8= +github.com/anthonynsimon/bild v0.13.0/go.mod h1:tpzzp0aYkAsMi1zmfhimaDyX1xjn2OUc1AJZK/TF0AE= +github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8= +github.com/aws/aws-sdk-go v1.42.7 h1:Ee7QC4Y/eGebVGO/5IGN3fSXXSrheesZYYj2pYJG7Zk= +github.com/aws/aws-sdk-go v1.42.7/go.mod h1:585smgzpB/KqRA+K3y/NL/oYRqQvpNJYvLm+LY1U59Q= +github.com/cespare/xxhash/v2 v2.1.2 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v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys= +gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw= +gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY= +gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ= diff --git a/handlers.go b/handlers.go new file mode 100644 index 0000000..b96b80b --- /dev/null +++ b/handlers.go @@ -0,0 +1,109 @@ +package main + +import ( + "bytes" + "encoding/base64" + "github.com/gin-gonic/gin" + "log" + "net/http" + "resource_manager/resource" + "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) + } + } +} diff --git a/image.go b/image.go new file mode 100644 index 0000000..5ffeb56 --- /dev/null +++ b/image.go @@ -0,0 +1,57 @@ +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 +} \ No newline at end of file diff --git a/main.go b/main.go new file mode 100644 index 0000000..b55fcf3 --- /dev/null +++ b/main.go @@ -0,0 +1,45 @@ +package main + +import ( + "github.com/gin-gonic/gin" + "github.com/joho/godotenv" + "log" + "net/http" + "os" + "resource_manager/cache" + "resource_manager/resource" + "strings" + "time" +) + +func init() { + log.SetPrefix("[ReM]") + godotenv.Load() +} + +func main() { + cacheManager := cache.NewManager() + resourceManager := resource.NewManager(cacheManager, 1 * time.Hour) + + server := gin.Default() + if strings.Contains(os.Getenv("PROFILE"), "legacy") { + setupLegacyEndpoints(server, resourceManager) + } + setupV1Endpoints(server, resourceManager) + log.Fatalln(http.ListenAndServe(":5201", server)) +} + +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)) +} diff --git a/resource/impl.go b/resource/impl.go new file mode 100644 index 0000000..8ecc10b --- /dev/null +++ b/resource/impl.go @@ -0,0 +1,272 @@ +package resource + +import ( + "bytes" + "context" + "errors" + "github.com/aws/aws-sdk-go/aws" + "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/cache" + "strings" + "sync" + "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() + } + 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 err := ioutil.WriteFile(fullPath, request.Buffer.Bytes(), 0o644); err != nil { + log.Println("[error] ", err) + } +} +func (f *fileManager) Download(ctx context.Context, path string) (file []byte, err error) { + fullPath := filepath.Join(f.path, path) + file, err = ioutil.ReadFile(fullPath) + 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) + createFolder(filepath.Join(toPath, "file")) + return copyFolder(fromPath, toPath, overwrite) +} +func (f *fileManager) Delete(path string) error { + fullPath := filepath.Join(f.path, path) + if err := os.Remove(fullPath); err != nil { + 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"))}, + ) + if err != nil { + panic(err) + } + uploader := s3manager.NewUploader(sess) + downloader := s3manager.NewDownloader(sess) + upload := make(chan UploadRequest, 20) + manager := awsManager{ + cacheManager, + upload, + make(map[string][]onUpload), + sync.Mutex{}, + expiration, + uploader, + downloader, + } + go manager.uploadRunner() + return &manager +} + +type onUpload chan bool + +type awsManager struct { + cache cache.Manager + requests chan UploadRequest + currentlyUploading map[string][]onUpload + uploadSync sync.Mutex + expiration time.Duration + uploader *s3manager.Uploader + downloader *s3manager.Downloader +} + +func (a *awsManager) uploadRunner() { + for req := range a.requests { + status := true + if !a.doesFileExist(req.Path) { + status = a.upload(req.Path, req.Buffer.Bytes(), req.MimeType) + } + a.notifyOnUploadComplete(req.Path, status) + } +} +func (a *awsManager) Upload(request UploadRequest) { + a.addToCurrentlyUploading(request.Path) + a.requests <- request +} +func (a *awsManager) Presign(ctx context.Context, path string) (string, error) { + if !a.waitForUploadComplete(path) { + return "", errors.New("failed upload") + } + // ask cache for latest url + if url, err := a.cache.Get(path); err == nil { + return url, nil + } + // if there is no value in cache, presign url and add it to cache + url, err := a.presign(path, a.expiration) + if err != nil { + a.cache.Set(path, url, a.expiration) + } + return url, err +} +func (a *awsManager) Download(ctx context.Context, path string) (file []byte, err error) { + return a.download(path) +} +func (a *awsManager) Copy(from string, to string, overwrite bool) error { + fromPath := strings.SplitN(from, "/", 2) + toPath := strings.SplitN(to, "/", 2) + output, err := a.downloader.S3.ListObjectsV2(&s3.ListObjectsV2Input{ + Bucket: aws.String(fromPath[0]), + Prefix: aws.String(fromPath[1]), + }) + if err != nil { + return err + } + for _, obj := range output.Contents { + if overwrite || !a.doesFileExist(strings.Replace(*obj.Key, fromPath[1], toPath[1], 1)) { + _, err = a.downloader.S3.CopyObject(&s3.CopyObjectInput{ + Bucket: aws.String(toPath[0]), + CopySource: aws.String(url.PathEscape(from)), + Key: aws.String(toPath[1]), + }) + if err != nil { + return err + } + } + } + return nil +} +func (a *awsManager) Delete(path string) error { + paths := strings.SplitN(path, "/", 2) + _, err := a.uploader.S3.DeleteObject(&s3.DeleteObjectInput{ + Bucket: aws.String(paths[0]), + Key: aws.String(paths[1]), + }) + if err != nil { + return err + } + a.cache.Remove(path) + return nil +} + +func (a *awsManager) addToCurrentlyUploading(path string) { + a.uploadSync.Lock() + a.currentlyUploading[path] = make([]onUpload, 0) + a.uploadSync.Unlock() +} +func (a *awsManager) waitForUploadComplete(path string) bool { + a.uploadSync.Lock() + defer a.uploadSync.Unlock() + if _, contains := a.currentlyUploading[path]; contains { + upload := make(onUpload) + a.currentlyUploading[path] = append(a.currentlyUploading[path], upload) + return <-upload + } + return true +} +func (a *awsManager) notifyOnUploadComplete(path string, status bool) { + a.uploadSync.Lock() + defer a.uploadSync.Unlock() + + for _, upload := range a.currentlyUploading[path] { + upload <- status + close(upload) + } + delete(a.currentlyUploading, path) +} + +func (a *awsManager) upload(path string, data []byte, mimeType string) bool { + paths := strings.SplitN(path, "/", 2) + _, err := a.uploader.Upload(&s3manager.UploadInput{ + Bucket: aws.String(paths[0]), + ContentType: aws.String(mimeType), + Key: aws.String(paths[1]), + Body: bytes.NewReader(data), + }) + return err == nil +} +func (a *awsManager) presign(path string, expiration time.Duration) (string, error) { + paths := strings.SplitN(path, "/", 2) + requestInput := s3.GetObjectInput{ + Bucket: aws.String(paths[0]), + Key: aws.String(paths[1]), + } + request, _ := a.downloader.S3.GetObjectRequest(&requestInput) + return request.Presign(expiration) +} +func (a *awsManager) download(path string) ([]byte, error) { + paths := strings.SplitN(path, "/", 2) + requestInput := s3.GetObjectInput{ + Bucket: aws.String(paths[0]), + Key: aws.String(paths[1]), + } + buf := aws.NewWriteAtBuffer([]byte{}) + _, err := a.downloader.Download(buf, &requestInput) + return buf.Bytes(), err +} +func (a *awsManager) doesFileExist(path string) bool { + paths := strings.SplitN(path, "/", 2) + requestInput := s3.HeadObjectInput{ + Bucket: aws.String(paths[0]), + Key: aws.String(paths[1]), + } + _, err := a.downloader.S3.HeadObject(&requestInput) + if err != nil && err.Error() == s3.ErrCodeNoSuchKey { + return true + } + return false +} + diff --git a/resource/manager.go b/resource/manager.go new file mode 100644 index 0000000..94795a7 --- /dev/null +++ b/resource/manager.go @@ -0,0 +1,33 @@ +package resource + +import ( + "bytes" + "context" + "os" + "resource_manager/cache" + "strings" + "time" +) + +type UploadRequest struct { + Buffer *bytes.Buffer + Path string + MimeType string + Overwrite bool +} + +func NewManager(cacheManager cache.Manager, expiration time.Duration) Manager { + if strings.Contains(os.Getenv("PROFILE"), "s3") { + return newS3Bucket(cacheManager, expiration) + } else { + return newLocalFolder(cacheManager, expiration) + } +} + +type Manager interface { + Upload(request UploadRequest) + Download(ctx context.Context, path string) (file []byte, err error) + Presign(ctx context.Context, path string) (string, error) + Copy(from string, to string, overwrite bool) error + Delete(path string) error +} diff --git a/resource_manager b/resource_manager new file mode 100755 index 0000000..4d42ccd Binary files /dev/null and b/resource_manager differ