Shiny url parameters. Is there any way Shiny server set...
Shiny url parameters. Is there any way Shiny server setting to accept URL parameters for initial values of UI elements #516 Open geotheory opened this issue on Mar 3, 2022 · 2 comments Pass URL parameter to shiny plot function Asked 9 years, 8 months ago Modified 9 years, 8 months ago Viewed 670 times I have the shiny app below in which when the user uploads an excel file then a selectInput() with its column names is displayed and also a url that leads to a deployed shiny app. App = 'app:app' The app to run. logo-url: URL of the logo that’s displayed in the ShinyProxy navigation bar; this can also be a local file using the file scheme (file://) proxy. One of the features it does not provide out-of-the-box is adding the selected parameters to the URL, like this: In order to have this type of URL I shall demonstrate a simple case with golem. See more in examples. In the example below, I've added code to parse URL parameters and update the inputs accordingly, so that users can save I have a shiny app https://merrittr. 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. Parameters app : str | shiny. 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. I have taken the code from How do you pass parameters to a shiny app via URL and tried to use it to update my selectInput() value in the server section of the Shiny app, but I don't really understand how the UI part Has anyone been successful in using URL parameters in a shiny dashboard app? I've experimented with the many posts and documentation for using the session$clientData$url_search string. Details parse_url_path allows parsing parameters lists from url. By default all the parameters will assume to be characters using the shiny::textInput I would like to have a shiny website that keeps the dynamic choices in the URL as output, so you can copy and share the URL. I'm looking for a clean way to build a page of my shinydashboard to only show a single item in my database. Basic Routing for Shiny Web Applications Web applications couldn’t exist without routing. Therefore, for the first parameter the user can select out of value1, value2 and value3 and for the second I use Auth0 for the authentication of my Shiny APP. That’s routing in a nutshell – matching UI components to a URL. Now everything works fine, but I need a parameter that should be passed when calling the URL. 0. By following these steps, we can effectively pass and use URL parameters in our Shiny applications. Let's say I have a button with "More info", then I click and shiny opens google, ask for "more info on something", gets the result, and presents it inside a box ? The host parameter was introduced in Shiny 0. I know I can obtain URL information using parseQueryString(session$clientData$url_search), but this only works in the server function. favicon-path: path to the favicon file to be used by ShinyProxy, both relative (to the working directory of ShinyProxy) and absolute paths can be used. Press Ctrl+C (or Ctrl+Break on Windows) to stop the app. The param values returned come from "httr::parse_url()" The param values returned come from "httr::parse_url()" Usage get_query_param(field = NULL, session = shiny::getDefaultReactiveDomain()) Arguments field If provided, retrieve only a param with this name. This is the default file that shiny run will look for, so you can run the application in the terminal without any additional parameters. Reposting from Stack Overflow, where I got no engagement: r - Shiny App ignores some URL parameters with reactive inputs - Stack Overflow I've built a shiny app where one dropdown depends on the selections made in another dropdown, because one category is a subset of another. The params parameter is a character vector for the names of the parameters users need to input. Appsilon released the open source shiny. function(input, output, session)). Specifically, I'd like to use the drop-down pickerInput from shinyWidgets instead of checkboxGroupInput, but only if Hi, I'm trying to figure out how get the parameters passed to the url of the route for a shiny application in PYTHON. I am able to read the http query parameters using session$clientData. Starts a Shiny app. proxy. Sep 19, 2025 · 5 Shiny App: How to Pass Multiple Tokens/Parameters through URL The standard delimeter for tokens passed through url to shiny app is the & symbol. router library. The default, app:app, represents the “usual” case where the application is named app inside a app. , /ingress) in-side the same 'shiny' HTTP server using user interface functions and HTTP responses. So as a first step I tried to check whether stopping/blocking shiny app if the parameter is not present. Note that having query string appear before #! may cause browser to refresh and thus reset Shiny session. Shiny is a package that makes it easy to create interactive web apps using R and Python. Ex-pose latest payload as a reactive and Session object Description Shiny server functions can optionally include session as a parameter (e. . ) Thanks. In this tutorial we will walk you through the basics of routing with the shiny. 0 Author Pawan Rama Mali [aut, cre] Maintainer Pawan Rama Mali <prm@outlook. g. R to server. As a follow-up to Py-Shiny Url Parameters, is it possible to 'merely call' the reactive function and retrieve the value, (without reactivity) and use the value in a computation/function? It seems that if the 'out ()' function is declared as an 'reactive. So I could have something like this: Context I have a shiny app that behaves differently based on url parameters passed to it Pain point When building this app, every time I relaunch the app, I need to refresh the browser with the url Like all Shiny modules, the id parameter is a unique identifier connected the server logic to the UI components. :exclamation: This is a read-only mirror of the CRAN R package repository. In a web application, routing is the process of using URLs to drive the user interface. I took this code as an example: https As Shiny is based on Starlette, I expected it would be possible with the Mount of Starlette to provide a dynamic path, where I could recover the parameters from it. I'm trying to figure out how to validate input parameters passed through URL for a Shiny app, to prevent malicious inputs. 1. effect' it is never called. shinypayload — Accept POST Data and URL Parameters in 'shiny' (Same-Port Integration). But when I deploy the APP with RStudio Connect, the parameters are always deleted after authentication. I want users to be able to pass in the path to their data as a parameter into the server. Simplify your app with this easy method!---This video is ba This function retrieves URL parameters from the current 'shiny' session. Encode the state of Shiny app's widgets into an URL query string, and use parameters from the URL query string to initialize the app. There's lots of materials on how to do it in R, but I can't find any help for the Python version of Sh… The above example contains two parameters, the user has to select a value for both parameters before starting an app (screenshot). Aug 10, 2025 · Shiny allows to use all of R to visualize information, no matter if it is a sophisticated statistical model or a simple plot. Hi, I'm relatively new to Shiny, so maybe I'm just overlooking something very obvious here. 9. The param values returned come from "httr::parse_url ()" Usage get_query_param(field = NULL, session = shiny::getDefaultReactiveDomain()) Arguments The REDCap program, allows me to redirect a user to a custom URL upon completion of the survey, and I can pipe a variable (subject_id) into the URL. I would like to pass this id with a URL parameter like /?selected_facilities=1010040 so I can embed the plots in another website. in> Description Handle POST requests on a custom path (e. The state of a shiny app gets saved by encoding its input values into an URL. This type of trick comes in handy if you have a separate application that people are using and you want to provide them a link to click out to your shiny app. On the server side, Shiny applications use the input object to receive user input from the client web browser. Convenience function to retrieve any params that were part of the requested page. The answer seems to deal with receiving parameters from the url (which I do with parseQueryString). This deployed shin My code: library(shiny) runApp( list(ui = fluidPage( uiOutput("tab") ), server = function(input, output, session){ url <- a("Google Homepage", href="https://www Hi, I'm trying to figure out how get the parameters passed to the url of the route for a shiny application in PYTHON. TidyX Episode 160: Prepopulate a shiny app url with user defined parameters This week, Ellis Hughes and I discuss methods for prepopulating a shiny app’s user defined parameters from a URL. These functions create Shiny app objects from either an explicit UI/server pair (shinyApp), or by passing the path of a directory that contains a Shiny app (shinyAppDir). For example, with a URL query parame I want to extract the usefulInformation part of the URL to be used in global. The following list describes the items available in the environment; they can be accessed using the $ operator (for example, session Like all Shiny modules, the id parameter is a unique identifier connected the server logic to the UI components. Parse url and build GET parameters list Description Extract info about url path and parameters that follow ? sign. I want to query the DB to show a checkboxGroup in a Shiny app, with only one of the groups, depending on a URL query parameter. Hello, I would like to know if it is possible to locate/route applications according to url parameters. I have a shiny app (using shiny dashboard). August 29, 2025 Type Package Title Accept POST Data and URL Parameters in 'shiny' (Same-Port Integration) Version 0. 1" means that, contrary to previous versions of Shiny, only the current machine can access locally hosted Shiny apps. I would like to create alternative UIs for my app depending on URL parameter. router package […] Article Basic Multipage Routing Has anyone been successful in using URL parameters in a shiny dashboard app? I've experimented with the many posts and documentation for using the session$clientData$url_search string. I am running a shiny server on AWS, and attempting to set url query parameters from user input, and allow forwarding of a url to others. As discussed in the previous section, ShinyProxy doesn’t accept any value other than what’s defined in the value-sets for the specific parameter. Discover how to directly display URL parameters in your Shiny app without needing input elements. I put this in my server: o I've figured out how to use the parseQueryString function to grab that parameter out of the URL in the server code block, but I can't figure out how to use it in that initial data load of the wqmdata data frame? Get Query Parameters Description Convenience function to retrieve any params that were part of the requested page. Jul 23, 2025 · Passing parameters to a Shiny app via URL allows for dynamic customization and interaction. There's lots of materials on how to do it in R, but I can't find any help for the Python version of Shiny. Its default value of "127. Here is the shiny server config location /app { # Host the directory of Shiny Apps stored in this directory site_dir /srv/shiny-server/app; # Log all Shiny output to files in this directory log_dir Details parse_url_path allows parsing parameters lists from url. R, and insert that as a variable into a URL query string to download the file from a database. I can confirm that passing URL parameters to a Shiny app is working with the actual version of ShinyProxy (v3. We have an auth api that needs to be called and it accepts parameters only in a certain way. However so far I have not been able to update the url in the browser so that I can copy and paste it to share specific analyses. When testing with localhost and AUth0 everything worked fine. Has anyone been successful in using URL parameters in a shiny dashboard app? I've experimented with the many posts and documentation for using the session$clientData$url_search string. Get URL Parameters in a 'shiny' Application Description This function retrieves URL parameters from the current 'shiny' session. My final goal is only redirect to side page containing parameters. py file within the current working directory. Decided to include this answer anyway because this was the first result on google for how to pass multiple params through url to shiny app and I'm sure others will find useful. It must be called from within a 'shiny' reactive context. The session object is an environment that can be used to access information and functionality relating to the session. The simplified example below works to retrieve values from For an R based solution to the problem of encoding the current state of a Shiny app's widgets into an URL query string, and restoring the user input values from that URL, see the package. shinyapps. Think about it in terms of the Appsilon website – you’ve visited our home page, navigated to the blog, and opened this particular article. To keep the URL compact and to avoid problems caused by the URL length limit (around 2000 characters) there are some points to keep in mind when developing your app. I have a Shiny app that I want to accept two user input, send it back from ui. These are the only two required parameters. However, it does not work when under the scope of shiny. (Otherwise, return all params) session The Shiny session Value The full list of params on the URL (if any), as a list. io/hydroshiny/ that starts off with 2 default parameters and then below alows the user to change these parameters via a side panel. One of the features it does not provide out-of-the-box is adding the selected parameters to the URL, like this: Dec 28, 2018 · I have a shiny app https://merrittr. router, please see code as below for more detail. By default all the parameters will assume to be characters using the shiny::textInput() function. 2) It doesn’t matter if we use /app/ or /app_direct/ in the test I made. Example shiny app code: Shiny allows to use all of R to visualize information, no matter if it is a sophisticated statistical model or a simple plot. The values in input are set by UI objects on the client web page. Usage parse_url_path(url_path) Arguments I have two user groups in a DB. R. I'm not sure if Shiny's built-in enableBookmarking function already takes care of this, however; if you type in an invalid parameter, it resets that input to the default. This is perfectly possible in St I've built a shiny application that allows users to import genetic data, and visualize it. If you need a more unique name, we recommend beginning the file name with app, because the Shiny extension expects this naming pattern. I am trying to pass in parameters on the url, use these to produce some data and then return it to the calling application. How can I fix this problem? The parameter changes all the time, so I need some kind Hi! Is it possible to pass parameters to a Shiny app (like HTTP GET/POST)? (My workaround at the moment is embedding the Shiny app in an iframe and get values from the PHP-generated parent with postMessage. k1zvn, ss5fv6, hl5t6, rlka, cvnt, kmw6db, c5kzlm, 2322a, hrna, r81gk,