149 lines
3.8 KiB
Go
149 lines
3.8 KiB
Go
// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package filemanager
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import (
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"context"
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"encoding/base64"
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"fmt"
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"io"
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"net/url"
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"time"
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"github.com/aws/aws-sdk-go-v2/aws"
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"github.com/aws/aws-sdk-go-v2/service/s3"
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"go.probo.inc/probo/pkg/coredata"
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)
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type Service struct {
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s3Client *s3.Client
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}
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func NewService(s3Client *s3.Client) *Service {
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return &Service{
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s3Client: s3Client,
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}
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}
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func (s *Service) GetFileBase64(
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ctx context.Context,
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file *coredata.File,
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) (base64Data string, mimeType string, err error) {
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result, err := s.s3Client.GetObject(
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ctx,
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&s3.GetObjectInput{
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Bucket: &file.BucketName,
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Key: &file.FileKey,
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},
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)
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if err != nil {
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return "", "", fmt.Errorf("cannot get file from S3: %w", err)
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}
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defer result.Body.Close()
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fileData, err := io.ReadAll(result.Body)
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if err != nil {
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return "", "", fmt.Errorf("cannot read file data: %w", err)
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}
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if result.ContentType == nil || *result.ContentType == "" {
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return "", "", fmt.Errorf("no MIME type available for file %s", file.FileKey)
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}
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base64Data = base64.StdEncoding.EncodeToString(fileData)
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mimeType = *result.ContentType
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return base64Data, mimeType, nil
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}
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func (s *Service) GetFileSize(content io.Reader) (int64, error) {
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seeker, ok := content.(io.Seeker)
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if !ok {
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return 0, fmt.Errorf("cannot determine file size: content is not seekable")
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}
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size, err := seeker.Seek(0, io.SeekEnd)
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if err != nil {
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return 0, fmt.Errorf("cannot determine file size: %w", err)
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}
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_, err = seeker.Seek(0, io.SeekStart)
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if err != nil {
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return 0, fmt.Errorf("cannot reset file position: %w", err)
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}
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return size, nil
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}
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func (s *Service) PutFile(
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ctx context.Context,
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file *coredata.File,
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content io.Reader,
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metadata map[string]string,
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) (int64, error) {
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_, err := s.s3Client.PutObject(
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ctx,
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&s3.PutObjectInput{
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Bucket: &file.BucketName,
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Key: &file.FileKey,
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Body: content,
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ContentType: &file.MimeType,
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Metadata: metadata,
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})
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if err != nil {
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return 0, fmt.Errorf("cannot upload file to S3: %w", err)
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}
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headOutput, err := s.s3Client.HeadObject(ctx, &s3.HeadObjectInput{
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Bucket: &file.BucketName,
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Key: &file.FileKey,
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})
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if err != nil {
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return 0, fmt.Errorf("cannot get object metadata: %w", err)
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}
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return *headOutput.ContentLength, nil
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}
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func (s *Service) GenerateFileUrl(
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ctx context.Context,
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file *coredata.File,
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expiresIn time.Duration,
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) (string, error) {
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presignClient := s3.NewPresignClient(s.s3Client)
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encodedFilename := url.QueryEscape(file.FileName)
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contentDisposition := fmt.Sprintf("attachment; filename=%q; filename*=UTF-8''%s",
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encodedFilename, encodedFilename)
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presignedReq, err := presignClient.PresignGetObject(
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ctx,
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&s3.GetObjectInput{
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Bucket: &file.BucketName,
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Key: &file.FileKey,
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ResponseCacheControl: aws.String("max-age=3600, public"),
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ResponseContentDisposition: &contentDisposition,
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},
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func(opts *s3.PresignOptions) {
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opts.Expires = expiresIn
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},
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)
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if err != nil {
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return "", fmt.Errorf("cannot presign GetObject request: %w", err)
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}
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return presignedReq.URL, nil
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}
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