Downloading and uploading a file in kotlin

Creating the request body for our upload request involves using a CountingRequestBody that reports progress and completion to a PublishSubject or another reactive type. The upload request consists of using the Retrofit function we implemented at the beginning, providing the file details and the created request body that will count progress.

The Retrofit definition and the format of the request parts will depend on how each particular API is put together. Here we are using a request that contains various plaintext parts for the file details and then one for the file to be uploaded. Our main upload function can put together all of these parts to create a single result stream. We will be able to observe this to get progress updates as well as the final result.

We can now upload a file to our API and update a view as the request progresses, which is nice for noticeably long operations like uploading larger files. Monitoring the progress of a web request may not be immediately obvious when reading through the Retrofit API, however, the powerful APIs of OkHttp and Okio can get the job done nicely. The solution we have developed can be used for any web request, as the counting process can be wrapped around any RequestBody that needs to be sent in a request.

This implementation has one issue. For the iOS sample, are you using ktor at all for that? Wondering if this is possible with ktor. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Don't subscribe All Replies to my comments Notify me of followup comments via e-mail.

You can also subscribe without commenting. By commenting, you agree to the terms and conditions outlined in our Privacy Policy. We're Hiring. Atomic Object. About This Author Giving a user the ability to download files in your app can be difficult to figure out. We should also check for file extension that the user is uploading as there would be some specific type of file that the site can process.

Also there is security issue if the user can upload any type of file. User might upload html file that can cause XSS cross site-scripting problems. For this post, we only need pdf file extensions as this Flask app would remove watermark from pdf files created by CamScanner App Famous App for scanning documents through Mobile Camera. Pdf files would have watermark at the bottom similar to what is shown in the image below :. Function checks the filename for allowed file extension and if file type is supported the function returns True otherwise it returns False.

Basically, we will access Wget from our WebDriver script to perform the download process. Download wget. Step 4: You need to debug the wget errors in command line before you execute the code using Selenium Webdriver. These errors will persist in Eclipse and the error messages will not be as informative. Best to first get wget working using command line.

If it works in command line it will definitely work in Eclipse. Collectives on Stack Overflow. Learn more. Downloading file and saving it to download folder using kotlin in Android Ask Question.

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