Parse-Swift: Wrong image data when fetching image

New Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest version of Parse Swift.
• I can reproduce the issue with the latest version of Parse Server.

Issue Description

I am seeing issues when fetching an image. When i fetch an image for the first time, it loads the image corretly. But when it then tries to load for the second time, the image is broken. I looked at what the downloaded image looks like when opening in a text editor.

I noticed it doesn’t contain data, but a path. This is an example: file:\/\/\/var\/folders\/y5\/3qbps9t11cb2fz7lh1x8bw7w0000gn\/T\/com.app.myApp\/CFNetworkDownload_rDopeR.tmp

My uploaded images in the Database are valid images.

I want to point out that this way of fetching images always worked for me. It’s since the Beta’s that there is something wrong, but I don’t find anything on the Apple Developer known issues page.

Steps to reproduce

This is an example of code I use.

let modelQuery =  Model.query()
modelQuery.find { result in
    switch result {
    case .success(let model):
        if let imageURL = model.image?.localURL {
            print("imageURL: \(imageURL)")
            if let imgData = try? Data(contentsOf: imageURL) {
                print("imgData: \(imgData)")
                print("imgData as string: \(String(decoding: imgData, as: UTF8.self))")
                self.imageData = imgData
            }
        } else {
            model.image?.fetch(completion: { result in
                switch result {
                case .success(let fetchedImage):
                    if let localImageUrl = fetchedImage.localURL {
                        print("localImageUrl: \(localImageUrl)")
                        if let imgData = try? Data(contentsOf: localImageUrl) {
                            print("imgData: \(imgData)")
                            print("imgData as string: \(String(decoding: imgData, as: UTF8.self))")
                            self.imageData = imgData
                        }
                    }
                case .failure(_):
                    break
                }
            })
        }
        self.model = model
    case .failure(_):
        break
    }
}

This is my log:

Actual Outcome

file:\/\/\/var\/folders\/y5\/3qbps9t11cb2fz7lh1x8bw7w0000gn\/T\/com.app.myApp\/CFNetworkDownload_rDopeR.tmp

Expected Outcome

Image data

Failing Test Case / Pull Request

• 🤩 I submitted a PR with a fix and a test case.
• 🧐 I submitted a PR with a failing test case.

Environment

Parse Swift

• SDK version: 1.9.8
• Operating system (iOS, macOS, watchOS, etc.): iOS, macOS
• Operating system version: iOS 15 Beta 8, Monterey 12.0 Beta 6

Server

• Parse Server version: 4.4.0
• Operating system: Back4App

Logs

localImageUrl: file:///Users/name/Library/Containers/com.app.myApp/Data/Library/Application%20Support/parse/com.app.myApp/Downloads/d48e0511e7660ab8e59fa2bb74cd48a4_1600.png
imgData: 123 bytes
imgData as string: "file:\/\/\/var\/folders\/y5\/3qbps9t11cb2fz7lh1x8bw7w0000gn\/T\/com.app.myApp\/CFNetworkDownload_rDopeR.tmp"