read csv files and excel files in shiny

Hello i want to include in this upload option in my shiny app an option to both read csv files and excel files , i can't figure it out , Thank you in advance.

  data = reactive({
    file1 = input$file
    if(is.null(file1)) {return(NULL)}
    if('.csv' %in% (file1$datapath)){
      data = read.csv(file1$datapath)
    }
      else{
        data = read_excel(file1$datapath)
    }
    data
  })

Here is an example you can run and explore to upload a .csv file

library(shiny)
library(DT)
#> 
#> Attaching package: 'DT'
#> The following objects are masked from 'package:shiny':
#> 
#>     dataTableOutput, renderDataTable

# Define UI
ui <- shinyUI(fluidPage(
  
  fileInput('target_upload', 'Choose file to upload',
            accept = c(
              'text/csv',
              'text/comma-separated-values',
              '.csv'
            )),
  radioButtons("separator","Separator: ",choices = c(";",",",":"), selected=";",inline=TRUE),
  DT::dataTableOutput("sample_table")
)
)

# Define server logic
server <- shinyServer(function(input, output) {
  
  df_products_upload <- reactive({
    inFile <- input$target_upload
    if (is.null(inFile))
      return(NULL)
    df <- read.csv(inFile$datapath, header = TRUE,sep = input$separator)
    return(df)
  })
  
  output$sample_table<- DT::renderDataTable({
    df <- df_products_upload()
    DT::datatable(df)
  })
  
}
)

# Run the application 
shinyApp(ui = ui, server = server)

Shiny applications not supported in static R Markdown documents

Created on 2022-01-11 by the reprex package (v2.0.1)