I have WAMP installed on a network machine. I have a table with file links, for people could open those files directly from a web page.
Those files are in another server, in the same network as WAMP.
When the users click on the link it appears the following error:
"not allowed to load local resource: file:///networkdrive/directorie/file.xls"
How can I resolve this?
I have this:
<button type="button" onClick="openfile('networkdrive/ptlr/Sectorial/LRCD/Horários/Equipas Turno.xls')">botao</button>
<script>
function openfile(file) {
window.location = "file:///" + file;
}
</script>
Just read the error: "not allowed to load local resource (...)"
Or on Firefox I get "Access to (...) from script denied".
It seems you are looking for a magical solution that will solve it, but no, it's exactly as the description of the error says: you are not allowed to do that because of security reasons.
The problem is that you're trying to make the browser open a file on your local drive, and that's not allowed from any protocol other than file:/// itself. So, what you'll want to do is either make sure the local file is also accessible via a server, or open the webpages that contain this script from file:/// too.
You can see this at work by first opening http://jsbin.com/OYObEMA/1/ and seeing this same error occur, then pressing CTRL+S and saving it as a single HTML file, and opening that HTML file then. The JSBin one opens via the internet, so isn't given access to the file:/// protocol, but the local (downloaded) HTML file can access it.
One way you could kind-of do this is to just provide the url the user needs to go to instead. So, just make an <input> that has a value set to the url the user would need to go to, and then provide the instructions "please copy this url into your url bar to open this file". That's not an elegant way to do it, but it would kind-of work.
About your answer to my initial comment: sure, I understood that. The question was not meant in a literal way, but to make you start thinking about what you actually try! You mix different environments.
either need to use webdav for this, if your client side applications are able to use that http extension to load and save files, or
you have to do the old scheme known from the IT middleages which is still typical for MS-Windows systems: offer the file for download via http and add an additional upload service (which will give you versioning pain), or
deliver your web page via the same protocol (network share) so that it is opened with as a local file on the client side, since then your are allowed to open additional local files referenced inside the web page.
Related
I'm trying to develop HTML base editor equipped with browsing local files function.
I know basically that is restricted by browser to open local files.
However I found out some method doing this activity.
using path begin from "localexplorer://" it works perfect for English path name.
But when I use Japanese folder name or file name it becomes error.
I tried to convert SJIS format that file names but this is not work.
Here is code.
[![error[![\]\[1\]][1]][1]][1]url = 'localexplorer:' + event.target.innerText;
array = str2array(url);
sjis_array = Encoding.convert(array, "SJIS", "UNICODE");
sjis= Encoding.codeToString(sjis_array);
window.open(url, '_blank');
According to browser security, javascript is only allowed to run in the sandbox, you cannot read or write arbitrary files:
JavaScript and the DOM provide the potential for malicious authors to
deliver scripts to run on a client computer via the Web. Browser
authors minimize this risk using two restrictions. First, scripts run
in a sandbox in which they can only perform Web-related actions, not
general-purpose programming tasks like creating files.
If the user selects a file via <input type="file">, you could try to read the content of the file through FileReader API, like this case: How to open a local disk file with JavaScript?
If you need to interact with files on the user's local device or a user-accessible network file system, you can try to use the File System Access API. And this must be done in a secure context, and must be called from within a user gesture. You can also read this article to learn more about it：The File System Access API: simplifying access to local files.
Thank you for your response, I solved this issue by Forefox plug in extensions, it seems like chrome did not support this functions even if there is plug in extensions.
I know there are similar questions, but I could not find one explaining what I am trying to do.
At one of the events I will be working, the MC will need to play music from his browser (it has been set up like that to update all live schedules).
The problem that I have is I get the Not allowed to load local resource error when I try to load the audio file from the local drive.
The reason I am trying to load the file from the local drive is for in case the network fails or something happens to the local server, then the event can still continue.
I have read that Chrome gives this error for privacy and security reasons, but Firefox does not load the file and gives no error for doing so.
Is there a browser where this will be possible or is there a way to change browser settings to allow this?
I have tried using the Flash settings to add the file's location as a trusted location, I am however unable to find a flash settings that says "Load from local disk (only)".
Thanx in advance.
No, it's not possible to load files from the local machine for security reasons. Imagine what I could read from your machine if it was >:D
You have to run your code on a web server, and also host the file there. You can easily install IIS if you're on Windows as it's included as an additional component. There's also XAMPP which is free.
I am creating a HTML page where I need to display the names of the files present in the specific local folder, example - C:\Users\User1\Documents\folder1 . I tried to write the code in java script but have not succeeded yet. Most of the question threads mention about "ActiveXObject" to be used but that itself does not work for me.
Reference: JavaScript: Read files in folder
Can anyone help me in achieving this?
In general, you can't do that. Web pages do not have access to the local filesystem.
Chrome can access the contents of a directory that is selected using a file input field. However, other browsers, such as Internet Explorer and Firefox, have not implemented this feature at this time, nor is there currently any way to access a directory that was not selected by the user.
In theory, it is possible to read arbitrary files using a signed Java (not Javascript) applet. However, this requires the user to approve a series of extremely scary warning dialogs — and requires Java! — so it's really not a viable solution.
I'm afraid I may be the bearer of bad news for your design: The action you are requesting expressly violates the security model as specified in the File API spec. The client implementation of FileReader() must make sure that "all files that are being read by FileReader objects have first been selected by the user." (W3C File API , 13. Security Considerations: http://www.w3.org/TR/FileAPI/#security-discussion).
It would be a huge security risk of browser scripts could just arbitrarily open and read any file from a path without any user interaction. No browser manufacturer would allow unfettered access to the entire file system like that.
Thinking about it however, if it is all being run locally, you could use ajax to query a server side script that could return the directory you request.
I have a chrome extension that, when clicked, needs to display a modal to the user. For convenience we would like to pull all the necessary code for the modal from a server and then execute the JavaScript in the context of the extension, before displaying anything to the user.
(running a Node.js server)
Is there a way to do this?
If not, any suggestions on alternative routes we could take?
cheers!
Have a read through https://developer.chrome.com/extensions/contentSecurityPolicy
In short - it's possible, but you need to serve the script over HTTPS, or else Chrome will reject the origin. You also need to explicitly write the CSP in the manifest.
"Convenience" is a strange word to use here though. What if the network is flaky or slow?
I am creating a HTML page where I need to display the names of the files present in the specific local folder, example - C:\Users\User1\Documents\folder1 . I tried to write the code in java script but have not succeeded yet. Most of the question threads mention about "ActiveXObject" to be used but that itself does not work for me.
Reference: JavaScript: Read files in folder
Can anyone help me in achieving this?
In general, you can't do that. Web pages do not have access to the local filesystem.
Chrome can access the contents of a directory that is selected using a file input field. However, other browsers, such as Internet Explorer and Firefox, have not implemented this feature at this time, nor is there currently any way to access a directory that was not selected by the user.
In theory, it is possible to read arbitrary files using a signed Java (not Javascript) applet. However, this requires the user to approve a series of extremely scary warning dialogs — and requires Java! — so it's really not a viable solution.
I'm afraid I may be the bearer of bad news for your design: The action you are requesting expressly violates the security model as specified in the File API spec. The client implementation of FileReader() must make sure that "all files that are being read by FileReader objects have first been selected by the user." (W3C File API , 13. Security Considerations: http://www.w3.org/TR/FileAPI/#security-discussion).
It would be a huge security risk of browser scripts could just arbitrarily open and read any file from a path without any user interaction. No browser manufacturer would allow unfettered access to the entire file system like that.
Thinking about it however, if it is all being run locally, you could use ajax to query a server side script that could return the directory you request.