问题
I'm trying to make my Shiny app to redirect the user to another page. I'm using httr
to send GET
requests and see if the user is logged in. If he's not, I want to redirect him to another link.
Can I do that using R / Shiny only, or do I need some extra libraries?
sample:
library(httr)
library(shiny)
shinyServer(function(input, output) {
rv <- reactiveValues()
rv$mytoken = session$request$token
observeEvent(input$button1, {
rv$a <- GET("my.url:3405/authtoken",
add_headers(
.headers = c("token" = rv$mytoken)
))
if (rv$a$status_code == 200) {
} else {
# redirect magic
}
})
}
shinyUI(fluidPage(
actionButton(button1, "btn")
))
回答1:
Here this will navigate you to google if not true
library(shiny)
jscode <- "Shiny.addCustomMessageHandler('mymessage', function(message) {window.location = 'http://www.google.com';});"
ui <- fluidPage(
tags$head(tags$script(jscode)),
checkboxInput("Redirect","Redirect",value = T)
)
server <- function(input, output, session) {
observeEvent(input$Redirect,{
if(!input$Redirect){
session$sendCustomMessage("mymessage", "mymessage")
}
})
}
shinyApp(ui,server)
来源:https://stackoverflow.com/questions/47157880/redirect-in-shiny-app