Downloading data from shiny app

The final code was:. This topic was automatically closed 54 days after the last reply. New replies are no longer allowed. If you have a query related to it or one of the replies, start a new topic and refer back with a link.

Unable to download data from Shiny app hosted on Shinyapps. Date , ". If it still not works, could you add the file you are using in the upload? If you'd like I can upload an appropriate. Thanks again. You can see the results after I uploaded a couple of puppy photos from Section 7.

Figure 9. The accept argument allows you to limit the possible inputs. Section 8. Putting all these ideas together gives us the following app where you can upload a. Again, the UI is straightforward: use either downloadButton id or downloadLink id to give the user something to click to download a file.

The results are shown in Figure 9. You can customise their appearance using the same class and icon arguments as for actionButtons , as described in Section 2. Unlike other outputs, downloadButton is not paired with a render function. Instead, you use downloadHandler , which looks something like this:. The job of this function is to create the name that will be shown to the user in the download dialog box.

The job of this function is to save the file in a place that Shiny knows about, so it can then send it to the user. This is an unusual interface, but it allows Shiny to control where the file should be saved so it can be placed in a secure location while you still control the contents of that file.

The following app shows off the basics of data download by allowing you to download any dataset in the datasets package as a tab separated file, Figure 9. I recommend using. You can avoid this complexity by using tab separated files, which work the same way everywhere. Note the use of validate to only allow the user to download datasets that are data frames.

A better approach would be to pre-filter the list, but this lets you see another application of validate. As well as downloading data, you may want the users of your app to download a report that summarises the result of interactive exploration in the Shiny app. Help users upload files to your app. Interactive plots. Selecting rows of data. Interactive plots - advanced. JavaScript actions packaged for Shiny apps. How to build a JavaScript based widget. How to add functionality to JavaScript widgets.

How to send messages from the browser to the server and back using Shiny. How to develop an interactive, dynamic help system for your app with introJS. How to create custom input bindings. Putting everything together to create an interactive dashboard.

Using custom CSS in your app. Build custom input objects. Build custom output objects. Add Google Analytics to a Shiny app. Packaging JavaScript code for Shiny. Communicating with Shiny via JavaScript. Debugging Shiny applications. Write error messages for your UI with validate. Shiny testing overview. Server function testing with Shiny. Modularizing Shiny app code. Communication between modules.