Passing file name in R from javascript using Rook package

Question

In R functon, I used fileName as a parameter to read and process the csv data present in this file. I used the rook package to integrate R with javascript. In javascript, I used the following code to get the file name of the imported file.

 <form id='importPfForm'> <input type='file' name='datafile' size='20'> <input type='button' value='IMPORT' onclick='importPortfolioFunction()'/> </form> function importPortfolioFunction( arg ) { var f = document.getElementById( 'importPfForm' ); var fileName= f.datafile.value; $.ajax( { type : "POST", url : 'http://localhost:'+portNo+'/custom/Ralgotree/hBasedFileImport?fileName='+fileName, dataType : "json", data : '{ "method" : "hBasedFileImport", "clientId": "31d0c653-d7e5-44b6-98b5-8c084f99514a", "version": 0 }', xhrFields: { withCredentials: false }, beforeSend : function(xhr) {}, success : function(data, textStatus, xmLHttpRequest){ }, error : function(xhr, ajaxOptions, thrownError) { } }); } 

Because of this method, only the file name is transferred, and not the full path to the file, I do not get the output in R. So, what kind of modification do I need to do to get the exact result. I use the following R code:

 s <- Rhttpd$new() s$add( name="Ralgotree", app=Rook::URLMap$new( '/hBasedFileImport' = function(env){ req <- Rook::Request$new(env) params <- Utils$parse_query(env$QUERY_STRING); res <- Rook::Response$new(headers = list( "Content-Type"="application/json" , "Access-Control-Allow-Origin"="*")) res$write(toJSON(hBasedFileImport(toString(params["fileName"])))) res$finish() } ) ) s$start(port = 9000) hBasedFileImport <- function(fileName){ portData <- read.csv(fileName,sep="\t") ----- ----- } 

Answer 1

code rook

  app=Rook::URLMap$new( 'hBasedFileImport'= function(env){ req <- Rook::Request$new(env) res <- Rook::Response$new() if (!is.null(req$POST())){ print("post method") data <- req$POST()[['file']] #print(data) Ralgotree::hBasedFileImport(toString(data$tempfile)) } res$finish() }, 

JS Code:

 <form id="uploadform" method="post" enctype="multipart/form-data" action="http://'+ip+':'+portNo+'/custom/Ralgotree/hBasedFileImport"><font size="2"><table bgcolor="#D2DFEF"><tr><td>select file</td><td><input name="file" id="file" size="27" type="file" /></td></tr><tr><td></td><td><input type="submit" name="action" value="UPLOAD" /> <input type="button" value="CANCEL" onclick="cancelImport();"/></td></tr><tr><td></td><td><span id="status" style="display:none">uploading...</span><iframe id="target_iframe" name="target_iframe" src="" style="width:0;height:0;border:0px"></iframe></td></tr></table></font></form>