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- Add image upload/download endpoints with authentication - Create object storage client for file handling - Integrate storage functionality with user system - Update API config and database schema - Add environment variables for storage configuration
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "regexp" | ||
|
|
||
| "github.com/go-chi/chi/v5" | ||
| ) | ||
|
|
||
| // isObjectNameRgx is a regular expression to match object names. | ||
| var isObjectNameRgx = regexp.MustCompile(`^([a-zA-Z0-9]+)\.(jpg|jpeg|png)`) | ||
|
|
||
| // uploadImageWithFormHandler handles the uploading of images through a multipart form. | ||
| // It expects the request to contain a "file" field with one or more files to be uploaded. | ||
| func (a *API) uploadImageWithFormHandler(w http.ResponseWriter, r *http.Request) { | ||
| // check if the user is authenticated | ||
| // get the user from the request context | ||
| user, ok := userFromContext(r.Context()) | ||
| if !ok { | ||
| ErrUnauthorized.Write(w) | ||
| return | ||
| } | ||
|
|
||
| // 32 MB is the default used by FormFile() function | ||
| if err := r.ParseMultipartForm(32 << 20); err != nil { | ||
| ErrStorageInvalidObject.With("could not parse form").Write(w) | ||
| return | ||
| } | ||
|
|
||
| // Get a reference to the fileHeaders. | ||
| // They are accessible only after ParseMultipartForm is called | ||
| files := r.MultipartForm.File["file"] | ||
| var returnURLs []string | ||
| for _, fileHeader := range files { | ||
| // Open the file | ||
| file, err := fileHeader.Open() | ||
| if err != nil { | ||
| ErrStorageInvalidObject.Withf("cannot open file %s", err.Error()).Write(w) | ||
| break | ||
| } | ||
| defer func() { | ||
| if err := file.Close(); err != nil { | ||
| ErrStorageInvalidObject.Withf("cannot close file %s", err.Error()).Write(w) | ||
| return | ||
| } | ||
| }() | ||
| // upload the file using the object storage client | ||
| // and get the URL of the uploaded file | ||
| storedFileID, err := a.objectStorage.Put(file, fileHeader.Size, user.Email) | ||
| if err != nil { | ||
| ErrInternalStorageError.With(err.Error()).Write(w) | ||
| break | ||
| } | ||
| returnURLs = append(returnURLs, objectURL(a.serverURL, storedFileID)) | ||
| } | ||
| httpWriteJSON(w, map[string][]string{"urls": returnURLs}) | ||
| } | ||
|
|
||
| // downloadImageInlineHandler handles the HTTP request to download an image inline. | ||
| // It retrieves the object ID from the URL parameters, fetches the object from the | ||
| // object storage, and writes the object data to the HTTP response with appropriate | ||
| // headers for inline display. | ||
| func (a *API) downloadImageInlineHandler(w http.ResponseWriter, r *http.Request) { | ||
| objectName := chi.URLParam(r, "objectName") | ||
| if objectName == "" { | ||
| ErrMalformedURLParam.With("objectName is required").Write(w) | ||
| return | ||
| } | ||
| objectID, ok := objectIDfromName(objectName) | ||
| if !ok { | ||
| ErrStorageInvalidObject.With("invalid objectName").Write(w) | ||
| return | ||
| } | ||
| // get the object from the object storage client | ||
| object, err := a.objectStorage.Get(objectID) | ||
| if err != nil { | ||
| ErrStorageInvalidObject.Withf("cannot get object %s", err.Error()).Write(w) | ||
| return | ||
| } | ||
| // write the object to the response | ||
| w.Header().Set("Content-Type", object.ContentType) | ||
| // w.Header().Set("Content-Length", fmt.Sprintf("%d", len(data))) | ||
| w.Header().Set("Content-Disposition", "inline") | ||
| if _, err := w.Write(object.Data); err != nil { | ||
| ErrInternalStorageError.Withf("cannot write object %s", err.Error()).Write(w) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| // objectURL returns the URL for the object with the given objectID. | ||
| func objectURL(baseURL, objectID string) string { | ||
| return fmt.Sprintf("%s/storage/%s", baseURL, objectID) | ||
| } | ||
|
|
||
| // objectIDfromURL returns the objectID from the given URL. If the URL is not an | ||
| // object URL, it returns an empty string and false. | ||
| func objectIDfromName(url string) (string, bool) { | ||
| objectID := isObjectNameRgx.FindStringSubmatch(url) | ||
| if len(objectID) != 3 { | ||
| return "", false | ||
| } | ||
| return objectID[1], true | ||
| } |
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