Test browser:
Version of Chrome: 52.0.2743.116
It is a simple javascript that is to open an image file from local like 'C:\002.jpg'
function run(){
var URL = "file:///C:\002.jpg";
window.open(URL, null);
}
run();
Here is my sample code.
https://fiddle.jshell.net/q326vLya/3/
Please give me any suitable suggestions.
We use Chrome a lot in the classroom and it is a must to working with local files.
What we have been using is "Web Server for Chrome". You start it up, choose the folder wishing to work with and go to URL (like 127.0.0.1:port you chose)
It is a simple server and cannot use PHP but for simple work, might be your solution:
https://chrome.google.com/webstore/detail/web-server-for-chrome/ofhbbkphhbklhfoeikjpcbhemlocgigb
1)
Open your terminal and type
npm install -g http-server
2)
Go to the root folder that you want to serve you files and type:
http-server ./
3)
Read the output of the terminal, something kinda http://localhost:8080 will appear.
Everything on there will be allowed to be got.
Example:
background: url('http://localhost:8080/waw.png');
Okay folks, I completely understand the security reasons behind this error message, but sometimes, we do need a workaround... and here's mine. It uses ASP.Net (rather than JavaScript, which this question was based on) but it'll hopefully be useful to someone.
Our in-house app has a webpage where users can create a list of shortcuts to useful files spread throughout our network. When they click on one of these shortcuts, we want to open these files... but of course, Chrome's error prevents this.
This webpage uses AngularJS 1.x to list the various shortcuts.
Originally, my webpage was attempting to directly create an <a href..> element pointing at the files, but this produced the "Not allowed to load local resource" error when a user clicked on one of these links.
<div ng-repeat='sc in listOfShortcuts' id="{{sc.ShtCut_ID}}" class="cssOneShortcutRecord" >
<div class="cssShortcutIcon">
<img ng-src="{{ GetIconName(sc.ShtCut_PathFilename); }}">
</div>
<div class="cssShortcutName">
<a ng-href="{{ sc.ShtCut_PathFilename }}" ng-attr-title="{{sc.ShtCut_Tooltip}}" target="_blank" >{{ sc.ShtCut_Name }}</a>
</div>
</div>
The solution was to replace those <a href..> elements with this code, to call a function in my Angular controller...
<div ng-click="OpenAnExternalFile(sc.ShtCut_PathFilename);" >
{{ sc.ShtCut_Name }}
</div>
The function itself is very simple...
$scope.OpenAnExternalFile = function (filename) {
//
// Open an external file (i.e. a file which ISN'T in our IIS folder)
// To do this, we get an ASP.Net Handler to manually load the file,
// then return it's contents in a Response.
//
var URL = '/Handlers/DownloadExternalFile.ashx?filename=' + encodeURIComponent(filename);
window.open(URL);
}
And in my ASP.Net project, I added a Handler file called DownloadExternalFile.aspx which contained this code:
namespace MikesProject.Handlers
{
/// <summary>
/// Summary description for DownloadExternalFile
/// </summary>
public class DownloadExternalFile : IHttpHandler
{
// We can't directly open a network file using Javascript, eg
// window.open("\\SomeNetworkPath\ExcelFile\MikesExcelFile.xls");
//
// Instead, we need to get Javascript to call this groovy helper class which loads such a file, then sends it to the stream.
// window.open("/Handlers/DownloadExternalFile.ashx?filename=//SomeNetworkPath/ExcelFile/MikesExcelFile.xls");
//
public void ProcessRequest(HttpContext context)
{
string pathAndFilename = context.Request["filename"]; // eg "\\SomeNetworkPath\ExcelFile\MikesExcelFile.xls"
string filename = System.IO.Path.GetFileName(pathAndFilename); // eg "MikesExcelFile.xls"
context.Response.ClearContent();
WebClient webClient = new WebClient();
using (Stream stream = webClient.OpenRead(pathAndFilename))
{
// Process image...
byte[] data1 = new byte[stream.Length];
stream.Read(data1, 0, data1.Length);
context.Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", filename));
context.Response.BinaryWrite(data1);
context.Response.Flush();
context.Response.SuppressContent = true;
context.ApplicationInstance.CompleteRequest();
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
And that's it.
Now, when a user clicks on one of my Shortcut links, it calls the OpenAnExternalFile function, which opens this .ashx file, passing it the path+filename of the file we want to open.
This Handler code loads the file, then passes it's contents back in the HTTP response.
And, job done, the webpage opens the external file.
Phew ! Again - there is a reason why Chrome throws this "Not allowed to load local resources" exception, so tread carefully with this... but I'm posting this code just to demonstrate that this is a fairly simple way around this limitation.
Just one last comment: the original question wanted to open the file "C:\002.jpg". You can't do this. Your website will sit on one server (with it's own C: drive) and has no direct access to your user's own C: drive. So the best you can do is use code like mine to access files somewhere on a network drive.
Chrome specifically blocks local file access this way for security reasons.
Here's an article to workaround the flag in Chrome (and open your system up to vulnerabilities):
http://www.chrome-allow-file-access-from-file.com/
There is a workaround using Web Server for Chrome. Here are the steps:
Add the Extension to chrome.
Choose the folder (C:\images) and launch the server
on your desired port.
Now easily access your local file:
function run(){
// 8887 is the port number you have launched your serve
var URL = "http://127.0.0.1:8887/002.jpg";
window.open(URL, null);
}
run();
PS: You might need to select the CORS Header option from advanced setting incase you face any cross origin access error.
This issue come when I am using PHP as server side language and the work around was to generate base64 enconding of my image before sending the result to client
$path = 'E:/pat/rwanda.png';
$type = pathinfo($path, PATHINFO_EXTENSION);
$data = file_get_contents($path);
$base64 = 'data:image/' . $type . ';base64,' . base64_encode($data);
I think may give someone idea to create his own work around
Thanks
Google Chrome does not allow to load local resources because of the security. Chrome need http url. Internet Explorer and Edge allows to load local resources, but Safari, Chrome, and Firefox doesn't allows to load local resources.
Go to file location and start the Python Server from there.
python -m SimpleHttpServer
then put that url into function:
function run(){
var URL = "http://172.271.1.20:8000/" /* http://0.0.0.0:8000/ or http://127.0.0.1:8000/; */
window.open(URL, null);
}
If you have php installed - you can use built-in server. Just open target dir with files and run
php -S localhost:8001
If you could do this, it will represent a big security problem, as you can access your filesystem, and potentially act on the data available there... Luckily it's not possible to do what you're trying to do.
If you need local resources to be accessed, you can try to start a web server on your machine, and in this case your method will work. Other workarounds are possible, such as acting on Chrome settings, but I always prefer the clean way, installing a local web server, maybe on a different port (no, it's not so difficult!).
See also:
Open local files(file://) using Chrome
Opening local files from chrome
You just need to replace all image network paths to byte strings in stored Encoded HTML string.
For this you required HtmlAgilityPack to convert Html string to Html document.
https://www.nuget.org/packages/HtmlAgilityPack
Find Below code to convert each image src network path(or local path) to byte sting.
It will definitely display all images with network path(or local path) in IE,chrome and firefox.
string encodedHtmlString = Emailmodel.DtEmailFields.Rows[0]["Body"].ToString();
// Decode the encoded string.
StringWriter myWriter = new StringWriter();
HttpUtility.HtmlDecode(encodedHtmlString, myWriter);
string DecodedHtmlString = myWriter.ToString();
//find and replace each img src with byte string
HtmlDocument document = new HtmlDocument();
document.LoadHtml(DecodedHtmlString);
document.DocumentNode.Descendants("img")
.Where(e =>
{
string src = e.GetAttributeValue("src", null) ?? "";
return !string.IsNullOrEmpty(src);//&& src.StartsWith("data:image");
})
.ToList()
.ForEach(x =>
{
string currentSrcValue = x.GetAttributeValue("src", null);
string filePath = Path.GetDirectoryName(currentSrcValue) + "\\";
string filename = Path.GetFileName(currentSrcValue);
string contenttype = "image/" + Path.GetExtension(filename).Replace(".", "");
FileStream fs = new FileStream(filePath + filename, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
Byte[] bytes = br.ReadBytes((Int32)fs.Length);
br.Close();
fs.Close();
x.SetAttributeValue("src", "data:" + contenttype + ";base64," + Convert.ToBase64String(bytes));
});
string result = document.DocumentNode.OuterHtml;
//Encode HTML string
string myEncodedString = HttpUtility.HtmlEncode(result);
Emailmodel.DtEmailFields.Rows[0]["Body"] = myEncodedString;
Chrome and other Browser restrict the access of a server to local files due to security reasons. However you can open the browser in allowed access mode. Just open the terminal and go to the folder where chrome.exe is stored and write the following command.
chrome.exe --allow-file-access-from-files
Read this for more details
This way, However, didn't work for me so I made a different route for every file in a particular directory. Therefore, going to that path meant opening that file.
function getroutes(list){
list.forEach(function(element) {
app.get("/"+ element, function(req, res) {
res.sendFile(__dirname + "/public/extracted/" + element);
});
});
}
I called this function passing the list of filename in the directory __dirname/public/extracted and it created a different route for each filename which I was able to render on server side.
This is for google-chrome-extension
const url = "file:///C:\002.jpg"
chrome.tabs.create({url, active:true})
manifest.json
{
"name": "",
"manifest_version": 3,
"permissions": [
"activeTab",
"tabs"
],
// ...
}
This solution worked for me in PHP. It opens the PDF in the browser.
// $path is the path to the pdf file
public function showPDF($path) {
if($path) {
header("Content-type: application/pdf");
header("Content-Disposition: inline; filename=filename.pdf");
#readfile($path);
}
}
I've encounterd this problem, and here is my solution for Angular, I wrapped my Angular's asset folder in encodeURIComponent() function. It worked. But still, I'd like to know more about the risk of this solution if there's any:
```const URL = ${encodeURIComponent(/assets/office/file_2.pdf)}
window.open(URL)
I used Angular 9, so this is my url when I clicked open local file:
```http://localhost:4200/%2Fassets%2Foffice%2Ffile_2.pdf```
In the case of audio files, when you give <audio src="C://somePath"/>, this throws an error saying cannot load local resource.
This makes sense because any webpage can't simply give a local path and access your private files.
In case you are trying to play audio with dynamic paths, by changing src property through JS, then here is a sample implementation using Flask server and HTML.
server.py
#app.route("/")
def home():
return render_template('audioMap.html')
#app.route('/<audio_file_name>')
def view_method(audio_file_name):
path_to_audio_file = "C:/Audios/yourFolderPath" + audio_file_name
return send_file(
path_to_audio_file,
mimetype="audio/mp3",
as_attachment=True,
attachment_filename="test.mp3")
audioMap.html
{% raw %}
<!DOCTYPE html>
<html>
<body>
AUDIO: <audio src="Std.mp3" controls >
</body>
</html>
{% endraw %}
Explanation:
When you give the audio file name under src property, this creates a get request in the flask as shown
127.0.0.1 - - [04/May/2021 21:33:12] "GET /Std.mp3 HTTP/1.1" 200 -
As you can see that, the flask has sent a Get request for the Std.mp3 file. So to serve this get request, we wrote an endpoint that takes the audio file name, reads it from the local directory, and returns it back. Hence the audio shows up on UI.
Note: This works only if you are rendering your HTML file using the
render_template method via flask or to say, using flask as your web server.
Google Chrome does not allow to load local resources because of the security .
There is a simple solution for this problem .
1.install live-server plugin in vscode
2.open the html file by live-server
I'm trying to find the absolute path of my javascript file (not the URL). Instead of hardcoding absolutely paths, I'd prefer using relative paths. For example:
/static/js/index.js
/static/config/1.json
/static/config/2.json
If I can get the absolute path of index.js, then I'm only ../config/ away from accessing either of the two json files.
Searching SO and the internet I either get suggestions for finding the URL, which work but won't solve my problem. Or for file paths, using windows.location.pathname but any permutation of it that I try either returns an empty string, or /.
var currentDirectory = window.location.pathname.split('/').slice(0, -1).join('/');
console.log("Curr dir: " + currentDirectory);
(Returns empty string)
var location = window.location.pathname;
var directoryPath = location.substring(0, location.lastIndexOf("/")+1);
console.log(" dirPath: " + directoryPath);
(Returns a /)
What I'm hoping for is something like:
var absolute_path = window.function.absolute.path()
Which would return say: /u/user/develop/project/server/static/js/index.js
From which I could: (pseudo code again)
var locations = absolute_path.split("js");
# location[0] = "/u/user/develop/project/server/static"
# location[1] = "js/index.js"
var config_file_locations = locations[0] + "config/";
var absolute_path_json1 = config_file_locations + "1.json"
-- EDIT --
Ok, looking at window.location it returns the URL so clearly that's not an answer here.
/static/js/index.js is an absolute path. You can tell because it starts with a /, which takes it back to the root of the web site.
There is no automatic way for a browser to tell anything about how a web server determined how it generated the content for a given URL.
All a browser knows is that it asked the server for /static/js/index.js and the server responded with some JavaScript.
The server might have read a static file, and that file might be in a directory called js and that directory might be a subdirectory of one called static … but then the server might have taken the whole URL, used it in a database query, and pulled the results from a database … or it might have proxied the request to another HTTP server on another computer on another continent.
If you want your client-side JS to know anything about the structure of the filesystem on the HTTP server, then you need to give it that information somehow. It can't get it from the browser.
for instance, the page of HTML contains the js, and the js's src is /js/test.js, and in this js file, can I get the string of /js/test.js while the js is excuted?
__dirname and process.cwd() can both do it in Node.js, but not work in js of broswer
can anyone help me?
HTML
<script src="/some/path.js" id="script1"></script>
<script src="/some/path2.js" id="script2"></script>
JS
// /some/path.js
var path = document.querySelector('#script1').getAttribute('src');
// /some/path2.js
var path = document.querySelector('#script2').getAttribute('src');
In a browser, a script is loaded through HTTP request. The URI (the bits after the host name) does not necessarily correspond to the file name.
If you just want the src attribute, then you can refer to this answer, which recommends using document.currentScript to obtain the script element.
const path = document.currentScript.getAttribute('src');
I haven't found any mentions in the HTML spec nor anywhere on the web, that says this is possible, still I ask just in case.
Is it possible to get the URL of a module to for example fetch files relative to that URL?
Let's say my index.html has a:
<script type="module">import '/foo/foo.js'</script>
and foo.js wants to know what it's own url is to load dynamically some file e.g. ./file-inside-foo.
As of the time of this writing document.currentScript returns null inside modules and is probably like that by design?
ECMA-262 has a Stage 3 Proposal for implementing import.meta. On the web this exposes a property named url that, when accessed from within a module, gives access to the full URL of that module.
// in /path/to/your/module.js
const { pathname } = new URL(import.meta.url);
console.log(pathname); // '/path/to/your/module.js'
You can also use the second parameter of the URL constructor to skip a step here:
const url = new URL('relative/file.js', import.meta.url);
Unfortunately, import.meta may not be available in all browsers yet but was implemented in v64 of Google Chrome.
The HTML Living Standard currently includes a Stage 3 Proposal to the ECMA-262 Standard that implements import.meta which exposes a property named url providing the full path to the current module including the protocol and filename.
// import.meta.url == 'http://your.domain.name/path/to/your/module.js'
To get the path of the current module without the protocol + domain you can construct a URL object from this value and access its .pathname property:
const modulePath = new URL(import.meta.url).pathname;
// modulePath = '/path/to/your/module.js'
To determine the directory where the current module is located you would construct a URL object for the relative path ./ using import.meta.url as the base parameter:
const moduleDir = new URL('./', import.meta.url).pathname;
// moduleDir == '/path/to/your/'
You can also get the path of any file relative to the current module in the same manner. For example:
let img = new Image();
image.src = new URL('../icons/glyph.png', import.meta.url).pathname;
// image.src == '/path/to/icons/glyph.png'
Unfortunately import.meta may not be available in all browsers yet however it was implemented in v64 of Google Chrome.
this is my problem i cant save my results to driver x that is company shared folder and i have permission to write for some reason , but i can save on driver c.
the messege show
Webpage error details
Message: Automation server can't create object Line: 93 Char: 1 Code:
0 URI:
file:///X:/OmrilDocs/Omrix%20Public/All%20Omrix%20Public/Training/index.html
notic : i can use only javascript , no server side language is allowd :(
this is the code i use
alert(answerText);
var fso = new ActiveXObject("Scripting.FileSystemObject");
var s = fso.CreateTextFile("X:\OmrilDocs\Omrix Public\All Omrix Public\Training\text.txt", true);
s.WriteLine(answerText);
s.Close();
im using ie8 on xp 2
You need to replace \ with \\.
It should look like:-
var s = fso.CreateTextFile("X:\\OmrilDocs\\Omrix Public\\All Omrix Public\\Training\\text.txt", true);
While it is running, it gives a popup window which you need to allow to create the file.
Screenshot look like:-
Eventhought you've loaded index.html from server, the code is executed in the work station.
You've written the path literally in your function. However, FSO tries to find the target from the work station only, and it is not capable to follow a path associated to some drive letter. (In other work stations that same path might be associated to a different letter.)
So, you need to to use the real name (or IP) of that server:
fso.CreateTextFile("//YOUR_SERVER_NAME/OmrilDocs...
Also the saving folder have to exist. When using true-argument in CreateTextFile only a new file is created to the provided path, new folders are not. Hence if there is a misstypo in the pathname, function will fail.