R Shiny:单个app.R的用户身份验证

Question

R Shiny:单个app.R的用户身份验证

Dan*_*ith 13 authentication r shiny

我正在开发一个R Shiny应用程序,并希望添加用户名和登录.我检查了RStudio演示但是只使用了ShinyServer Pro,我使用mongolite软件包将formData备份到Mongodb.

有没有办法在生成应用程序UI之前添加用户登录？

Answer 1

Joh*_*n D 13

ShinyProxy是一个开源的Docker和基于Spring Java的Shiny服务器,旨在解决这个问题.它允许您对应用程序配置文件中的用户进行硬编码,连接到LDAP服务器,使用SSO/Keycloak或社交网络登录.

Answer 2

Cal*_*oss 9

以下是如何使用cookie进行身份验证的示例.更多信息可以在我的博客中找到.

首先将cookie js下载到www /文件夹:

if (!dir.exists('www/')) {
    dir.create('www')
}

download.file(
  url = 'https://cdn.jsdelivr.net/npm/js-cookie@2/src/js.cookie.min.js',
  destfile = 'www/js.cookies.js'
)

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安装必要的包:

install.packages(c('shiny', 'shinyjs', 'bcrypt'))

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将以下代码保存为app.R并单击"运行应用程序"按钮:

library(shiny)
library(shinyjs)
library(bcrypt)


# This would usually come from your user database.

# Never store passwords as clear text
password_hash <- hashpw('secret123') 

# Our not so random sessionid
# sessionid <- paste(
#   collapse = '', 
#   sample(x = c(letters, LETTERS, 0:9), size = 64, replace = TRUE)
# )
sessionid <- "OQGYIrpOvV3KnOpBSPgOhqGxz2dE5A9IpKhP6Dy2kd7xIQhLjwYzskn9mIhRAVHo" 


jsCode <- '
  shinyjs.getcookie = function(params) {
    var cookie = Cookies.get("id");
    if (typeof cookie !== "undefined") {
      Shiny.onInputChange("jscookie", cookie);
    } else {
      var cookie = "";
      Shiny.onInputChange("jscookie", cookie);
    }
  }
  shinyjs.setcookie = function(params) {
    Cookies.set("id", escape(params), { expires: 0.5 });  
    Shiny.onInputChange("jscookie", params);
  }
  shinyjs.rmcookie = function(params) {
    Cookies.remove("id");
    Shiny.onInputChange("jscookie", "");
  }
'

server <- function(input, output) {

  status <- reactiveVal(value = NULL)
  # check if a cookie is present and matching our super random sessionid  
  observe({
    js$getcookie()
    if (!is.null(input$jscookie) && 
        input$jscookie == sessionid) {
          status(paste0('in with sessionid ', input$jscookie))
    }
    else {
      status('out')
    }
  })

  observeEvent(input$login, {
    if (input$username == 'admin' & 
        checkpw(input$password, hash = password_hash)) {
      # generate a sessionid and store it in your database,
      # sessionid <- paste(
      #   collapse = '', 
      #   sample(x = c(letters, LETTERS, 0:9), size = 64, replace = TRUE)
      # )
      # but we keep it simple in this example...
      js$setcookie(sessionid)
    } else {
      status('out, cause you don\'t know the password secret123 for user admin.')
    }
  })

  observeEvent(input$logout, {
    status('out')
    js$rmcookie()
  })

  output$output <- renderText({
    paste0('You are logged ', status())}
  )
}

ui <- fluidPage(
  tags$head(
    tags$script(src = "js.cookies.js")
  ),
  useShinyjs(),
  extendShinyjs(text = jsCode),
  sidebarLayout(
    sidebarPanel(
      textInput('username', 'User', placeholder = 'admin'),
      passwordInput('password', 'Password', placeholder = 'secret123'),
      actionButton('login', 'Login'),
      actionButton('logout', 'Logout')
    ),
    mainPanel(
      verbatimTextOutput('output')
    )
  )
)

shinyApp(ui = ui, server = server)

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除了你显然没有意识到你需要明确披露你的联盟,这看起来是一个很好的答案,并且远远高于大多数人在链接他们自己的网站时所提出的.做得好.感谢您的贡献.但是,请[编辑]将您的第二句改为"可以在我的博客上找到更多信息". (3认同)

Answer 3

Mik*_*ise 6

好吧,你可以通过代码使用renderUI和动态更改UI来实现.以下是如何执行此操作的示例:

library(shiny)
library(ggplot2)

u <- shinyUI(fluidPage(
  titlePanel("Shiny Password"),

  sidebarLayout(position = "left",
                sidebarPanel( h3("sidebar panel"),
                              uiOutput("in.pss"),
                              uiOutput("in.clr"),
                              uiOutput("in.titl"),
                              uiOutput("in.cnt"),
                              uiOutput("in.seed")

                ),
                mainPanel(h3("main panel"),
                          textOutput('echo'),
                          plotOutput('stdplot')
                )
  )
))

pok <- F

s <- shinyServer(function(input, output) 
{
  output$in.pss   <- renderUI({ input$pss; if (pok) return(NULL) else return(textInput("pss","Password:","")) })
  output$in.clr   <- renderUI({ input$pss; if (pok) return(selectInput("clr","Color:",c("red","blue"))) else return(NULL) })
  output$in.titl  <- renderUI({ input$pss; if (pok) return(textInput("titl","Title:","Data")) else return(NULL) })
  output$in.cnt   <- renderUI({ input$pss; if (pok) return(sliderInput("cnt","Count:",100,1000,500,5)) else return(NULL) })
  output$in.seed  <- renderUI({ input$pss; if (pok) return(numericInput("seed","Seed:",1234,1,10000,1)) else return(NULL) })
  histdata <- reactive(
    {
      input$pss;
      validate(need(input$cnt,"Need count"),need(input$seed,"Need seed"))
      set.seed(input$seed)
      df <- data.frame(x=rnorm(input$cnt))
    }
  )
  observe({
     if (!pok) {
       password <- input$pss
       if (!is.null(password) && password == "pass") {
         pok <<- TRUE
       }
     }
   }
  )
  output$echo = renderText(
    {
      if (pok) {
        s <- sprintf("the %s is %s and has %d rows and uses the %d seed",
           input$ent,input$clr,nrow(histdata()),input$seed)
      } else {
        s <- ""
      }
      return(s)
    }
  )
  output$stdplot = renderPlot(
    {
      input$pss
      if (pok) {
        return(qplot(data = histdata(),x,fill = I(input$clr),binwidth = 0.2,main=input$titl))
      } else {
        return(NULL)
      }
    }
  )
}
)
shinyApp(ui=u,server=s)

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