I have the following code:
<script>
var fileContent;
$.ajax({
url : "text.txt",
dataType: "text",
...
It loads the text from a .txt file in order to obtain the data. If the text.txt is on the same path as the html code, it loads the data. However, if I type for example (placing the file in a different folder):
url: "../../../files/text.txt"
It does not allow me to obtain the file. Any ideas of how to do it or how to implement it without changing the code in a significant way? Thanks!
There are three possible causes of this:
You are using HTTP
You are using HTTP and the path you are trying to access is not exposed by your web server. (You cannot access files above the directory root by default).
You need to give the file a URL on your web server and request that URL.
You are using local files
Different browsers have different security restrictions for Ajax on local files.
You can get this problem if the file is in a directory above the HTML document (some browsers only allow you to access files in the same or a lower directory).
You can resolve this by using HTTP. Ajax in general works very poorly without HTTP.
You simply have the URL wrong
Correct the URL.
Related
I've built a simple html page with javascript in a separate file, called on a button press.
I've opened the html file in chrome, and the path resembles: file:///home/tom/projects/index.html
The javascript needs to read a JSON file (file:///home/tom/projects/mydata.json) which is in the same directory, using a hardcoded path.
I'm really struggling to do this. As I understand, this is because I'm using client side js (meaning I can't use the fs library for example), which is limiting my options.
According to the question here, I can't load the file if I use the URL in the format: file:///home/to.... as it gives me the error:
Cross origin requests are only supported for protocol schemes: HTTP, data, chrome, chrome-extension, https.
If I start an HTTP-server, as the answer suggests, I can use server-side modules, but if possible I would like to avoid this.
I've noticed many answers that suggest using a dialog box like this:
var selectedFile = document.getElementById('input').files[0];
function readFile (file_path) {
var reader = new FileReader();
reader.readAsText(file_path);
console.log(reader.substring(0, 100));
};
but I can't make this work with a path in the form: file:///home/tom/projects/mydata.json
Is there a way to load a .json file from a file:///home/to.... format URL using client-side javascript, with a hardcoded path (ie not asking the user to select the file from a selection box)?
This is a deliberate security restriction, to stop a user from being given, and then opening, a HTML page which then tries to read their disk.
Run your page in a webserver (as that question suggested) then you can either load the JSON from a URL (e.g. something like http://localhost/projects/mydata.json) using JavaScript, or use a server-side language to fetch it and display it inside the rendered HTML. Either way will work, the first way is probably simpler and closest to what you've got now.
It's always far better to serve HTML pages from a HTTP server, the way it's intended to be.
I'm new to javascript might be this question looks silly. How to check whether the html files are loading from local file system or server using javascript?
For example when I open the html files from my local system (/home/user/1.html) browser shows in url
file:///home/user/1.html
But if i load 1.html file into my local server then, if i access that file browser shows in url like below
http://localhost/GUI/1.html
I want to find whether files are loading from my server or local file system using java script.
Is there any way to find this using java script method.
You can use the window.location object to do that.
use window.location.protocol property.
The following line of code will return true if the file is being served from the file system.
window.location.protocol == "file:";
It basically checks if the protocol being used is file or not.
My website is in /var/www/html.
I have a few files (PHP and Javascript) that are one level up, in /var/www.
I'm able to access the PHP file for my MySQL login credentials, but I can't access the Javascript file. In the <head> of my Login document, this is how I have it:
<script src="../sha256.js"></script>
This worked fine until I moved the sha256.js file. But now, when I try to login, the document can't find the file.
Can I access a Javacsript file that is out of the document root?
No.
If it isn't under the Document Root then it doesn't have a URL1.
If it doesn't have a URL then the browser can't request it.
Given the URL http://example.com/ and the relative URL from it ../foo the browser will delete a 'directory' off the end of the URL for each ../. If there aren't any, then it will ignore them. Thus it resolves to http://example.com/foo.
I'm able to access the PHP file for my MySQL login credentials
This is, presumably, server side code which deals with the server's file system and not with URLs.
1This is a simplification. There are other ways (alias, mod_rewrite, etc) to give a file a URL, but for your purposes, moving the file under the Document Root is the simplest solution.
My requirement is to read the json file which contains some data and store in some other .js file.
I got task to read local file from local disk in Javascript , i have used file path like - D:\json\analytics.json.
(document).ready(){
($).getData("D:\json\analytics.json");
}
when i see in firebug it takes other url.
How I can do it, is it possible to read file from javascript.
I don't know javascript , i have seen some answer but i am not able to understand .
Need Solution , how I can achieve it. is there any other way to read file on jsp without using scriptlet . From server side , can send it on the jsp page.
I think Jaronmanda's answer won't work cause it will hit cross origin issue, see "Cross origin requests are only supported for HTTP." error when loading a local file.
As the page suggested, in general you need to serve that json file from a web service (same domain, or allow your domain to access), but it depends on what you really need to do. If you can control where that json file is stored, the easier way is to put that in a subdirectory of your html file, and do:
$(document).ready(function () {
$.get('<directory>/analytics.json', function (data) {
// Do your stuff
});
});
can i get the full path of my html page through javascript eg My Index page is at
d:/somefolder/anotherfolder/index.html
so can i get this path
Thanks
You can only access your current file path relative to your host URL, you cannot access the folder path of that file.
This is restricted in JavaScript due to security reasons. If that was allowed, malicious scripts could easily read your server's internal folder structures, which is bad.
On a Local Machine it is not possible, however you could use:
document.location.href;
to get the URL, where your file is hosted
no you can't browser don't allow javascript to access the file paths due to security reasons