我正在嘗試構建一個用 Go 編寫的云函數，它將使用 Google 云函數基礎設施中可用的 ImageMagick 庫將多個圖像合成和操作為結果輸出圖像。問題的根源是我想使用的 ImageMagick 函數可用，但它需要多個不同的輸入才能工作。我的輸入是存儲桶中的對象。os/exec Cmd 結構允許您通過使用“ExtraFiles”數組來執行此操作，并且我知道如何向我的 ImageMagick 命令提供這些額外文件。但是，“ExtraFiles”數組只想存儲 os.File 的實例，而 GCP 存儲客戶端在您打開文件時會為您提供一個“Reader”實例。 backgroundBlob := storageClient.Bucket(inputBucket).Object(background) backgroundImg, err := backgroundBlob.NewReader(ctx) if err != nil { return "", fmt.Errorf("backgroundImg: %v", err) } foregroundBlob := storageClient.Bucket(inputBucket).Object(foreground) foregroundImg, err := foregroundBlob.NewReader(ctx) if err != nil { return "", fmt.Errorf("foregroundImg: %v", err) } outputBlob := storageClient.Bucket(outputBucket).Object(output) outputImg := outputBlob.NewWriter(ctx) defer outputImg.Close() // Set up some additional file handles since we're dealing with more inputs than STDIN Can cope with cmd := exec.Command("convert", "fd:3", "fd:4", "-composite", "fd:5") cmd.ExtraFiles = append(cmd.ExtraFiles,backgroundImg) cmd.ExtraFiles = append(cmd.ExtraFiles,foregroundImg) cmd.ExtraFiles = append(cmd.ExtraFiles,outputImg) if err := cmd.Run(); err != nil { return "", fmt.Errorf("cmd.Run: %v", err) } log.Printf("Blurred image has been uploaded to %s", outputBlob.ObjectName()) return outputBlob.ObjectName(), nil}```So, from where I am at the moment, I need to do one of the following two things:1. Figure out how to get Google's storage API to treat/use objects in their storage buckets as "os.File"sOR2. Figure out how to execute my "convert" command using multiple Readers as input, rather than leveraging the ExtraFiles array.If anybody out there has any ideas on how to achieve either of the above, or has alternate ways of solving this problem, I would be very grateful to hear them!
從存儲桶將多個文件傳遞給 exec.Command 調用
慕田峪9158850
2023-07-04 16:49:55
