在Shiny中上传许多文件 [英] Uploading many files in Shiny

问题描述

我正在开发一个可按主题/主题组织和可视化许多PDF文档的应用程序.我可以上传和阅读一个PDF，但是很难阅读多个PDF文档.

I am developing an app that helps to organize and visualize many PDF documents by topic/theme. I can upload and read a single PDF but I have difficulty in reading multiple PDF documents.

对于单个PDF文档:

ui.R

  ---
  fileInput('file1', 'Choose PDF File', accept=c('.pdf'))

 ---

server.R

   --------

   library(pdftools)

   -------


 mypdf<-reactive({

   inFile <- input$file1

   if (is.null(inFile)){
  return(NULL)
  }else{
  pdf_text(inFile$datapath)

   }

  })

---

要上传多个PDF文件，我必须在代码的ui.R部分中使用multiple = TRUE，但是如何读取所有上传的文件?

---

To upload multiple PDF files, I have to use multiple = TRUE in the ui.R portion of the code, but how can I read in all the uploaded files?

推荐答案

可以在这样的for循环中读取上载的文件

The uploaded files can be read in a for loop like this

for(i in 1:length(input$files[,1])){
  lst[[i]] <- read.csv(input$files[[i, 'datapath']])
}

这是CSV文件的示例，但您可以对pdf文件进行同样的操作.

This is an example for CSV files but you can do the same for pdf files.

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