pass php variable to shiny

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Dr. Hans Hansen

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Dec 8, 2014, 9:58:06 AM12/8/14
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Hi everyone,

i embedded a shiny app in a simple html page as an iframe. The html page has a password field and i use a variable $loggedin in php to store the login status. Is there a simple way to use this variable in shiny? I figure that i probably need to use javascript?

the php file looks like this:

<html>
<body>
Hello world.
<?php
$loggedin = TRUE;
echo $loggedin;
 ?>
</body>
</html>


ui.r
shinyUI(pageWithSidebar(

  # Application title
  headerPanel("Hello Shiny!"),

  # Sidebar with a slider input for number of observations
  sidebarPanel(
    sliderInput("obs", 
                "Number of observations:", 
                min = 1,
                max = 1000, 
                value = 500)
),


  mainPanel(
    plotOutput("distPlot")
  )
))



server.r

library(shiny)
shinyServer(function(input, output) {
  output$distPlot <- renderPlot({
  plot(1) # here i want a ifelse with the php-variable
  })
})

Joe Cheng

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Dec 8, 2014, 12:56:04 PM12/8/14
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This is pretty insecure... any code you could put in the HTML that would tell Shiny that the user is logged in, would be trivial to spoof. How does PHP know you're logged in? Is there a signed cookie, or a session, or something?

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Dr. Hans Hansen

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Dec 8, 2014, 3:40:17 PM12/8/14
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Hm, there is not really much at stake here... i have a post html form for the password and read that in php. i want data upload in the shiny app to be only available after people contacted me. i thought of having two shiny apps, one with and one without data upload and have php code which sets up the iframe link, but i didn't like the idea to keep to apps up to date.

an alternative might be to do a check for a password in shiny, like in the user account example?

Jan Stanstrup

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Dec 9, 2014, 7:24:15 AM12/9/14
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Dr. Hans Hansen

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Dec 11, 2014, 8:57:31 AM12/11/14
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Thanks, i'll try that!

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