CachedImage - Access the downloaded file

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CachedImage - Access the downloaded file

Barto 26

I am using the CachedImage component of ffimageloading. I have a kind of gallery with a carousel view.

All the images are loaded through an internet URL, they are not local images. I would like to add the image sharing function. But I don't want to download the file again, I would like to know if there is a way to access the file that the CachedImage component already downloaded to be able to reuse it in the share function.

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Answer 1

Hello,

Welcome to our Microsoft Q&A platform!

Hi, Barto. To get the cached image, try using the MD5Helper.

   var filepath = ImageService.Instance.MD5Helper.MD5("the file url");

Refer to: https://github.com/luberda-molinet/FFImageLoading/issues/1214#issuecomment-472073935

Best Regards,

Jarvan Zhang

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Answer 2

Barto 26

Thanks @JarvanZhang

I share with you how part of my code is:

   var key = ImageService.Instance.Config.MD5Helper.MD5("https://yourfileUrlOrKey");  
   var imagePath = await ImageService.Instance.Config.DiskCache.GetFilePathAsync(key);  
   var tempFile = Path.Combine(Path.GetTempPath(), "test.jpg");  
   if (File.Exists(tempFile))  
   {  
       File.Delete(tempFile);  
   }  
   File.Copy(imagePath, tempFile);  
  
   await Share.RequestAsync(new ShareFileRequest  
   {  
       Title = "Test",  
       File = new ShareFile(tempFile)  
   });

The temporary file I believe, since the cached file has no extension and the applications do not recognize the type.

JarvanZhang 23,971 Reputation points

2021-03-31T08:17:27.317+00:00
The temporary file I believe, since the cached file has no extension and the applications do not recognize the type.

Try to create a file via the cached image's path to check if the file is null. If it's not null, then try to share the file using the cached file path directly.

//1. var key = ImageService.Instance.Config.MD5Helper.MD5("https://yourfileUrlOrKey"); var imagePath = await ImageService.Instance.Config.DiskCache.GetFilePathAsync(key); FileStream fs = File.Create(path); //check if the fs is null //2. await Share.RequestAsync(new ShareFileRequest { Title = "Test", File = new ShareFile(imagePath) });
Barto 26 Reputation points

2021-03-31T13:31:13.34+00:00

I tried it that way. But no matter how much you specify the type of content (example new ShareFile(imagePath, "image/png")), some applications (example whatapp) did not recognize it, since they verify by the extension of the file and not by the type of content. So I had to create a temporary file with the corresponding extension.

I show you the example in whatsapp of what happens if I directly shared the cache file:
JarvanZhang 23,971 Reputation points

2021-03-31T13:33:42.277+00:00

Thanks for sharing the info about this.

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CachedImage - Access the downloaded file

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