Api file helper download

Most of the time, we get requirements to download or return the file within the given ASP. We shall see how to perform a download or file return in ASP. NET core-based application. This file download or return technique can be used for any ASP.

NET Core, Angular app. The file helper method is built into your controller. These methods are coming from the FileResult abstract class and gives you multiple options for retrieving files to send to the client. Here we will be returning an image from the Controller method. Using the below technique controller can return any other types of images like. Here we will be returning a PDF file from the Controller method. Using the below technique controller can return any other types of file as well like.

Here we will be returning or downloading an Excel file. Using the below technique Controller can return any other types of images like. You cal also use the File class for file processing. To download a file stored on Google Drive, use the files. File downloads initiated from your app require at least read access to the file. Your app must be authorized with a scope that allows file content read access.

For example, an app using the drive. Users with edit permission may restrict downloading by read-only users by setting the viewersCanCopyContent field to false. To learn more about scopes, refer to Authenticate your users. Files identified as abusive malware, etc. Your application should interactively warn the user before using this query parameter. Partial download involves downloading only a specified portion of a file.

You can specify the portion of the file you want to download by using a byte range with the Range header. For example:. Download Google Workspace documents using the files. If you want to allow a user to view a file directly in a web browser instead of through the API, use the webContentLink. You can either redirect a user to this URL, or offer it as a clickable link. The file must be either owned by or shared with the user in order to view it.

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