Is there a way that I can get the last value (based on the '\' symbol) from a full path?
Example:
C:\Documents and Settings\img\recycled log.jpg
With this case, I just want to get recycled log.jpg from the full path in JavaScript.
This question is related to
javascript
var filename = fullPath.replace(/^.*[\\\/]/, '')
This will handle both \ OR / in paths
<html>
<head>
<title>Testing File Upload Inputs</title>
<script type="text/javascript">
<!--
function showSrc() {
document.getElementById("myframe").href = document.getElementById("myfile").value;
var theexa = document.getElementById("myframe").href.replace("file:///","");
alert(document.getElementById("myframe").href.replace("file:///",""));
}
// -->
</script>
</head>
<body>
<form method="get" action="#" >
<input type="file"
id="myfile"
onChange="javascript:showSrc();"
size="30">
<br>
<a href="#" id="myframe"></a>
</form>
</body>
</html>
What platform does the path come from? Windows paths are different from POSIX paths are different from Mac OS 9 paths are different from RISC OS paths are different...
If it's a web app where the filename can come from different platforms there is no one solution. However a reasonable stab is to use both '\' (Windows) and '/' (Linux/Unix/Mac and also an alternative on Windows) as path separators. Here's a non-RegExp version for extra fun:
var leafname= pathname.split('\\').pop().split('/').pop();
In Node.js, you can use Path's parse module...
var path = require('path');
var file = '/home/user/dir/file.txt';
var filename = path.parse(file).base;
//=> 'file.txt'
The following line of JavaScript code will give you the file name.
var z = location.pathname.substring(location.pathname.lastIndexOf('/')+1);
alert(z);
Not more concise than nickf's answer, but this one directly "extracts" the answer instead of replacing unwanted parts with an empty string:
var filename = /([^\\]+)$/.exec(fullPath)[1];
What platform does the path come from? Windows paths are different from POSIX paths are different from Mac OS 9 paths are different from RISC OS paths are different...
If it's a web app where the filename can come from different platforms there is no one solution. However a reasonable stab is to use both '\' (Windows) and '/' (Linux/Unix/Mac and also an alternative on Windows) as path separators. Here's a non-RegExp version for extra fun:
var leafname= pathname.split('\\').pop().split('/').pop();
Just for the sake of performance, I tested all the answers given here:
var substringTest = function (str) {
return str.substring(str.lastIndexOf('/')+1);
}
var replaceTest = function (str) {
return str.replace(/^.*(\\|\/|\:)/, '');
}
var execTest = function (str) {
return /([^\\]+)$/.exec(str)[1];
}
var splitTest = function (str) {
return str.split('\\').pop().split('/').pop();
}
substringTest took 0.09508600000000023ms
replaceTest took 0.049203000000000004ms
execTest took 0.04859899999999939ms
splitTest took 0.02505500000000005ms
And the winner is the Split and Pop style answer, Thanks to bobince !
var file_name = file_path.substring(file_path.lastIndexOf('/'));
What platform does the path come from? Windows paths are different from POSIX paths are different from Mac OS 9 paths are different from RISC OS paths are different...
If it's a web app where the filename can come from different platforms there is no one solution. However a reasonable stab is to use both '\' (Windows) and '/' (Linux/Unix/Mac and also an alternative on Windows) as path separators. Here's a non-RegExp version for extra fun:
var leafname= pathname.split('\\').pop().split('/').pop();
<script type="text/javascript">
function test()
{
var path = "C:/es/h221.txt";
var pos =path.lastIndexOf( path.charAt( path.indexOf(":")+1) );
alert("pos=" + pos );
var filename = path.substring( pos+1);
alert( filename );
}
</script>
<form name="InputForm"
action="page2.asp"
method="post">
<P><input type="button" name="b1" value="test file button"
onClick="test()">
</form>
Not more concise than nickf's answer, but this one directly "extracts" the answer instead of replacing unwanted parts with an empty string:
var filename = /([^\\]+)$/.exec(fullPath)[1];
Successfully Script for your question ,Full Test
<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<p title="text" id="FileNameShow" ></p>
<input type="file"
id="myfile"
onchange="javascript:showSrc();"
size="30">
<script type="text/javascript">
function replaceAll(txt, replace, with_this) {
return txt.replace(new RegExp(replace, 'g'), with_this);
}
function showSrc() {
document.getElementById("myframe").href = document.getElementById("myfile").value;
var theexa = document.getElementById("myframe").href.replace("file:///", "");
var path = document.getElementById("myframe").href.replace("file:///", "");
var correctPath = replaceAll(path, "%20", " ");
alert(correctPath);
var filename = correctPath.replace(/^.*[\\\/]/, '')
$("#FileNameShow").text(filename)
}
The following line of JavaScript code will give you the file name.
var z = location.pathname.substring(location.pathname.lastIndexOf('/')+1);
alert(z);
var file_name = file_path.substring(file_path.lastIndexOf('/'));
Another one
var filename = fullPath.split(/[\\\/]/).pop();
Here split have a regular expression with a character class
The two characters have to be escaped with '\'
Or use array to split
var filename = fullPath.split(['/','\\']).pop();
It would be the way to dynamically push more separators into an array, if needed.
If fullPath is explicitly set by a string in your code it need to escape the backslash!
Like "C:\\Documents and Settings\\img\\recycled log.jpg"
Little function to include in your project to determine the filename from a full path for Windows as well as GNU/Linux & UNIX absolute paths.
/**
* @param {String} path Absolute path
* @return {String} File name
* @todo argument type checking during runtime
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/lastIndexOf
* @example basename('/home/johndoe/github/my-package/webpack.config.js') // "webpack.config.js"
* @example basename('C:\\Users\\johndoe\\github\\my-package\\webpack.config.js') // "webpack.config.js"
*/
function basename(path) {
let separator = '/'
const windowsSeparator = '\\'
if (path.includes(windowsSeparator)) {
separator = windowsSeparator
}
return path.slice(path.lastIndexOf(separator) + 1)
}
What platform does the path come from? Windows paths are different from POSIX paths are different from Mac OS 9 paths are different from RISC OS paths are different...
If it's a web app where the filename can come from different platforms there is no one solution. However a reasonable stab is to use both '\' (Windows) and '/' (Linux/Unix/Mac and also an alternative on Windows) as path separators. Here's a non-RegExp version for extra fun:
var leafname= pathname.split('\\').pop().split('/').pop();
I use:
var lastPart = path.replace(/\\$/,'').split('\\').pop();
It replaces the last \ so it also works with folders.
Ates, your solution doesn't protect against an empty string as input. In that case, it fails with TypeError: /([^(\\|\/|\:)]+)$/.exec(fullPath) has no properties.
bobince, here's a version of nickf's that handles DOS, POSIX, and HFS path delimiters (and empty strings):
return fullPath.replace(/^.*(\\|\/|\:)/, '');
A question asking "get file name without extension" refer to here but no solution for that. Here is the solution modified from Bobbie's solution.
var name_without_ext = (file_name.split('\\').pop().split('/').pop().split('.'))[0];
Ates, your solution doesn't protect against an empty string as input. In that case, it fails with TypeError: /([^(\\|\/|\:)]+)$/.exec(fullPath) has no properties.
bobince, here's a version of nickf's that handles DOS, POSIX, and HFS path delimiters (and empty strings):
return fullPath.replace(/^.*(\\|\/|\:)/, '');
Not more concise than nickf's answer, but this one directly "extracts" the answer instead of replacing unwanted parts with an empty string:
var filename = /([^\\]+)$/.exec(fullPath)[1];
Little function to include in your project to determine the filename from a full path for Windows as well as GNU/Linux & UNIX absolute paths.
/**
* @param {String} path Absolute path
* @return {String} File name
* @todo argument type checking during runtime
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/lastIndexOf
* @example basename('/home/johndoe/github/my-package/webpack.config.js') // "webpack.config.js"
* @example basename('C:\\Users\\johndoe\\github\\my-package\\webpack.config.js') // "webpack.config.js"
*/
function basename(path) {
let separator = '/'
const windowsSeparator = '\\'
if (path.includes(windowsSeparator)) {
separator = windowsSeparator
}
return path.slice(path.lastIndexOf(separator) + 1)
}
Not more concise than nickf's answer, but this one directly "extracts" the answer instead of replacing unwanted parts with an empty string:
var filename = /([^\\]+)$/.exec(fullPath)[1];
function getFileName(path, isExtension){
var fullFileName, fileNameWithoutExtension;
// replace \ to /
while( path.indexOf("\\") !== -1 ){
path = path.replace("\\", "/");
}
fullFileName = path.split("/").pop();
return (isExtension) ? fullFileName : fullFileName.slice( 0, fullFileName.lastIndexOf(".") );
}
<html>
<head>
<title>Testing File Upload Inputs</title>
<script type="text/javascript">
<!--
function showSrc() {
document.getElementById("myframe").href = document.getElementById("myfile").value;
var theexa = document.getElementById("myframe").href.replace("file:///","");
alert(document.getElementById("myframe").href.replace("file:///",""));
}
// -->
</script>
</head>
<body>
<form method="get" action="#" >
<input type="file"
id="myfile"
onChange="javascript:showSrc();"
size="30">
<br>
<a href="#" id="myframe"></a>
</form>
</body>
</html>
<script type="text/javascript">
function test()
{
var path = "C:/es/h221.txt";
var pos =path.lastIndexOf( path.charAt( path.indexOf(":")+1) );
alert("pos=" + pos );
var filename = path.substring( pos+1);
alert( filename );
}
</script>
<form name="InputForm"
action="page2.asp"
method="post">
<P><input type="button" name="b1" value="test file button"
onClick="test()">
</form>
This solution is much simpler and generic, for both 'file name' and 'path'.
const str = 'C:\\Documents and Settings\\img\\recycled log.jpg';
// regex to split path to two groups '(.*[\\\/])' for path and '(.*)' for file name
const regexPath = /^(.*[\\\/])(.*)$/;
// execute the match on the string str
const match = regexPath.exec(str);
if (match !== null) {
// we ignore the match[0] because it's the match for the hole path string
const filePath = match[1];
const fileName = match[2];
}
A question asking "get file name without extension" refer to here but no solution for that. Here is the solution modified from Bobbie's solution.
var name_without_ext = (file_name.split('\\').pop().split('/').pop().split('.'))[0];
The complete answer is:
<html>
<head>
<title>Testing File Upload Inputs</title>
<script type="text/javascript">
function replaceAll(txt, replace, with_this) {
return txt.replace(new RegExp(replace, 'g'),with_this);
}
function showSrc() {
document.getElementById("myframe").href = document.getElementById("myfile").value;
var theexa = document.getElementById("myframe").href.replace("file:///","");
var path = document.getElementById("myframe").href.replace("file:///","");
var correctPath = replaceAll(path,"%20"," ");
alert(correctPath);
}
</script>
</head>
<body>
<form method="get" action="#" >
<input type="file"
id="myfile"
onChange="javascript:showSrc();"
size="30">
<br>
<a href="#" id="myframe"></a>
</form>
</body>
</html>
Another one
var filename = fullPath.split(/[\\\/]/).pop();
Here split have a regular expression with a character class
The two characters have to be escaped with '\'
Or use array to split
var filename = fullPath.split(['/','\\']).pop();
It would be the way to dynamically push more separators into an array, if needed.
If fullPath is explicitly set by a string in your code it need to escape the backslash!
Like "C:\\Documents and Settings\\img\\recycled log.jpg"
This solution is much simpler and generic, for both 'file name' and 'path'.
const str = 'C:\\Documents and Settings\\img\\recycled log.jpg';
// regex to split path to two groups '(.*[\\\/])' for path and '(.*)' for file name
const regexPath = /^(.*[\\\/])(.*)$/;
// execute the match on the string str
const match = regexPath.exec(str);
if (match !== null) {
// we ignore the match[0] because it's the match for the hole path string
const filePath = match[1];
const fileName = match[2];
}
In Node.js, you can use Path's parse module...
var path = require('path');
var file = '/home/user/dir/file.txt';
var filename = path.parse(file).base;
//=> 'file.txt'
The complete answer is:
<html>
<head>
<title>Testing File Upload Inputs</title>
<script type="text/javascript">
function replaceAll(txt, replace, with_this) {
return txt.replace(new RegExp(replace, 'g'),with_this);
}
function showSrc() {
document.getElementById("myframe").href = document.getElementById("myfile").value;
var theexa = document.getElementById("myframe").href.replace("file:///","");
var path = document.getElementById("myframe").href.replace("file:///","");
var correctPath = replaceAll(path,"%20"," ");
alert(correctPath);
}
</script>
</head>
<body>
<form method="get" action="#" >
<input type="file"
id="myfile"
onChange="javascript:showSrc();"
size="30">
<br>
<a href="#" id="myframe"></a>
</form>
</body>
</html>
I use:
var lastPart = path.replace(/\\$/,'').split('\\').pop();
It replaces the last \ so it also works with folders.
Successfully Script for your question ,Full Test
<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<p title="text" id="FileNameShow" ></p>
<input type="file"
id="myfile"
onchange="javascript:showSrc();"
size="30">
<script type="text/javascript">
function replaceAll(txt, replace, with_this) {
return txt.replace(new RegExp(replace, 'g'), with_this);
}
function showSrc() {
document.getElementById("myframe").href = document.getElementById("myfile").value;
var theexa = document.getElementById("myframe").href.replace("file:///", "");
var path = document.getElementById("myframe").href.replace("file:///", "");
var correctPath = replaceAll(path, "%20", " ");
alert(correctPath);
var filename = correctPath.replace(/^.*[\\\/]/, '')
$("#FileNameShow").text(filename)
}
function getFileName(path, isExtension){
var fullFileName, fileNameWithoutExtension;
// replace \ to /
while( path.indexOf("\\") !== -1 ){
path = path.replace("\\", "/");
}
fullFileName = path.split("/").pop();
return (isExtension) ? fullFileName : fullFileName.slice( 0, fullFileName.lastIndexOf(".") );
}
Just for the sake of performance, I tested all the answers given here:
var substringTest = function (str) {
return str.substring(str.lastIndexOf('/')+1);
}
var replaceTest = function (str) {
return str.replace(/^.*(\\|\/|\:)/, '');
}
var execTest = function (str) {
return /([^\\]+)$/.exec(str)[1];
}
var splitTest = function (str) {
return str.split('\\').pop().split('/').pop();
}
substringTest took 0.09508600000000023ms
replaceTest took 0.049203000000000004ms
execTest took 0.04859899999999939ms
splitTest took 0.02505500000000005ms
And the winner is the Split and Pop style answer, Thanks to bobince !
Source: Stackoverflow.com