$(function(){
$("#testdiv").load("sometext.txt",function(){
alert("Succes");
});
});
I get the alert but I am not able to see anything in the "#testdiv".The file,sometext.txt is in the same folder.I tried giving it absolute path but i get 404 ,url not found on this server.
What am I doing wrong here?
Windows has several "features" that are built to make their operating system more usable for most people. Hiding the file extension is one of those "features" that often do more harm than how much they help.
Though, as you might know, a file doesn't need a file extension, the first few bytes of the file are used to tell the OS what file type it is, the extension just makes it easy.
When using windows to develop anything, you probably want to see the actual name of your files, so make sure to check out one of the guides on how to enable displaying the file extension, like this one.
If you can't GET a file with JS always double, or better even tripple check, that the file can be accessed through the browser first.
Related
I'm trying to write a chrome-extension that closes tabs when they're loaded and their links contain specific keywords, which I've saved in a .json file. Because the content.js has no access on the browser peripherals, I had to use the background.js script to close the tab. So far the extension does all that except loading the data from the .json, which means that I had to write the json (just for testing) into the background.js. Because I want to ban a lot of links this is'nt an option for me. So I decided on storing a list with the links in a .json file, which is stored in the same folder as the background.js, which means that it's on the localhost and not on any kink of webserver. That means that it should be possible to access this file, because after my research, I came to the assumption that the background.js runs on the localhost as well. So there should'nt occur any file accessing limitation issues right?
Unfortuantely I've got no idea how to write this in pure .js, because all the tutorials or posts here are either accessing the file from or in a webserver or using some kind of fancy library. This should be possible without one right?
chrome.webNavigation.onCompleted.addListener(closeTab, {
url: [
{urlPrefix: 'https://www.google.de/'},
{urlPrefix: 'https://sghm.eu/iserv/login'},
]
});
function closeTab(e) {
if (!e.frameId) {
chrome.tabs.remove(e.tabId);
}
}
this is how my code looks now, I want to have some kind of loadData('data.json') function that returns the .jsons content, so that I can delete this whole .json data strucure within the js.
It should be possible to access the javascript object notation language via javascript.
I personally think you can do this far easier and faster with using Chrome.storage. The data is saved as a json object and easy to reference and it sounds like exactly what you need as you're just referencing key/pair values anyway.
I want to make a local HTML application read and update a JSON file and use its content to display HTML content. Alas, I'm stuck at the very first step, as I can't seem to setup any sort of test file that simply notices and reads a JSON file. From what I see online, I need to use other libraries. I attempted to use require.js but I can't make it work and the documentation doesn't help me.
I imported the require.js with a tag and attempt to launch something out of what I got from the documentation, but there's nothing to do. It doesn't look like it's willing to take .json files.
requirejs([
'example'
], function(example) {
const config = require('./config.json')
});
My issue is to get the program to read the file. From there I believe I can make the display of it, but this JS thing is all alien to me.
The recommended way would be to run a web server or use something like Electron and build a desktop app (as #chrisG points out in the comments). But if you wanna do this in the browser without an web server you could do something like:
Run Chrome with the --allow-file-access-from-files (or however you allow local file access in your browser of choice)
Put your JSON in a js file and load it (to just do this you don't need the flag, but if you want to use absolute path you'll need it)
I have a pretty run-of-the-mill node.js server with expressjs installed locally for development purposes; I store various files and request them via a basic HTTP call that returns the file through express' res.download feature. Most of the time, this works without a hitch. For a very small subset of files, however, the end-user receives a file that is much larger than expected (almost 2x) and is unreadable by any conventional viewer. Out of maybe a hundred files, this has only happened twice, and both were JPG files, but the sample is too small to draw any conclusion. What I know :
The issue is reproductible : if it happens with a file, it always happens;
The issue is not related to the way files are stored : if I swap the problematic file with another one but keep everything else the same (name, location, etc.), it works fine;
Right before the res.download happens, the file is okay : checking its size with fs.stats returns the correct value
The HTTP response encounters no visible problem : no error, 200 response code...
The source file seems to have normal metadata and JPG markers
UPDATE I did some tests, and the issue seems to be somehow related to encoding : the mangled response file is, for reasons unknown, encoded in UTF-8 ; the size discrepancy comes from all non-UTF-8 characters being replaced by EF BF BD (the unknown character symbol) ! I still can't understand why it happens, what makes these few files different from others, and if it can be detected and/or corrected upstream.
UPDATE 2 After some additional tests, I still can't quite pinpoint the cause, but I can add the following info :
Systems-wise, the issue happens during the data streaming in fs.js
The root cause is located somewhere in the EXIF data of the image
For those interested, the source image (source.JPG) and download result (response.JPG) can be found here : http://www.sycomor.fr/test/ ; I also added a similar image that isn't affected by the download and comes out clean. For what it's worth, both pictures were taken minutes apart, with the same camera at the same settings, so I strongly doubt the issue is caused by some external source.
Thanks !
Your issue comes from 'connect-livereload' in your express configuration.
It corrupts binary stream while injecting the reloading script.
Refer to https://github.com/intesso/connect-livereload/issues/39 for details.
I've seen that a lot and I just don't know what it means. This, for example:
<script src="http://server.com/file.js?y=2345678" type="text/javascript"></script>
If it is in deed possible to 'catch' the value of 'y' in the javascript file, how would that be?
Thank you.
PS. I know what mod_rewrite is and that is not the answer, just in case :)
This is to force the browser not to cache the file, by making it believe that it is a dynamic file with get parameter rather than a static one.
This is often used to facilitate caching of the JS file. You set a far-future Expires header which means the browser may cache it for a very long time. If you change something in the file you also update the number in the querystring, which will make the browser refetch the file. This works because caching is for unique filenames and the querystring is part of the filename (as far as the browser is concerned).
A similar approach to this is to use rewrite rules in the web server to have some part of the file name which it doesnät care about. Here's a Nginx rule to show what I mean:
rewrite ^/style\..*\.css$ /style.css;
I use this rule to have filenames like style.42750cad6.css, which always points to the file style.css. The text in the middle is changed whenever I change style.css. The difference between the first approach is that this does not use the querystring so the caching will work in more browsers.
ok the way i see it in two ways.
it can be used to load js without caching
for every request to the server, the server might log information(if logging is enabled), if i am using it for analytics i can therefore use a different parameter for locations and from the log i can analyse and get required details.
I would like to save a csv file from a web page. However, the link on the page
does not lead directly to the file, but it calls some kind of javascript, which leads
to the opening of the file. In other words, there is no explicit url address for the
file i want to download or at least I don't know what it should be.
I found a way to download a file by activating Internet Explorer,going to the web page
and pressing the link button and then saving the file through the dialog box.
This is pretty ugly, and I am wondering if there is a more elegant (and fast) method to retrieve a file without using internet explorer(e.g. by using urllib.retrieve method)
The javascript is of the following form (see the comment, it does not let publish the source code...):
"CSV"
Any ideas?
Sasha
You can look at what the javascript function is doing, and it should tell you exactly where it's downloading from.
I had exactly this sort of problem a year or two back; I ended up installing the rhino javascript engine; grepping the javascript out of the target document and evaluating the url within rhino, and then fetching the result.