ajax - passing file name to R from javascript using Rook package -

in r functon, used filename parameter read , process csv data present in file. used rook package integrate r javascript. in javascript used following code file name of 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 method passes file name instead of full file path , wont output in r. modification need exact output. using 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")    -----    ----- } 

rook code

  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>