How To Check The Input File Object File Size On Client Side?
Dec 20, 2004
I have a form with three Input File form objects in which the user can add image files. But I am worried about the problems these controls can lead, because to check the file size the server needs to receive the entire file, so serious problems may happen, for example:
1. Malicious user trying to collapse the website sending big files.
2. Users that have not seen the warning “Maximum size: 100 KB� for each image, and try to send three image files consisting in 1,5 MB each one. These users will have a bad experience waiting one hour or more to upload the images, and after that receive an alert saying “Oooops! Your image files are too big.� And also, web server will waste an important amount of resources. The same case with 100 users at the same time can be a nightmare!
I have been searching a way to check the file size on client side without having to force user to install anything, but I think that there isn’ t nothing to do with javascript. But I found an interesting PHP article that explains a way to do it with this server side language. The technique consists in:
“A hidden field (measured in bytes) that precede the file input field, and its value is the maximum filesize accepted. This is an advisory to the browser, PHP also checks it. This form element should always be used as it saves users the trouble of waiting for a big file being transferred only to find that it was too big and the transfer failed. Code:
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May 18, 2009
I have a .js file, we want to make it to load a html file right next to it, both files are on client system. I couldn't find any such examples and some posts talked about JavaScript security issues, I wonder if it is related to what I want.
Someone said .js file is not really JaveScript file, though Microsoft named it 'JavaScript'.
note that I am trying to "call" .html file from the .js file, not embed html code in .js.
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Jul 20, 2011
I am developing a mobile app. I have a script that will read the contents of a csv into an array. It works great, however I am not sure how to take that array and insert it into a db. The following is the script that reads the csv --
function IO(U, V) {
var X = !window.XMLHttpRequest ? new
ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest;
X.open(V ? "PUT" : "GET", U, false);
[Code].....
I want to insert the array 'mycells' into the db but do not know what the correct syntax would be.
t.executeSql('INSERT INTO mytable (name, phone, street, city, state) VALUES (?
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Jan 13, 2005
what I'm trying to do is get the browser to display a warning if the file the user inputs is one of an array of allowed files (which is thoroughly checked server-side), but are wasteful in size (like .bmp .tif .avi .wav). I want them to be able to upload it if they want, but just to notify them they could save space by converting to a smaller format (as they pay per megabyte). So on submit I need to get the file input value, check the extension, and if its allowed but wasteful to display a message with a yes and no button, which would submit if they press yes and not if they press no.
I'm not very experience with javascript but I know a lot about php, but I don't really know what the equivalent functions are.
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Nov 29, 2011
I've got a major headache with IE in that I have a support form that allows users to submit tickets with files which is then emailed off.
Using javascript, jQuery and PHP I have everything under control with all of our favourite browsers - but then comes along IE.
support.php
...
<!-- file -->
<div class="fileUploadEntry">
[code]....
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Sep 6, 2005
I have an html page, with jscript inside. some variables, some of them
multidimensional arrays. i need to send this information, which can be
changed by the user, to an asp file. the only way i could think of, is
putting it inside hidden box and sending the form. is there any more
elegant way?
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Oct 12, 2011
I am trying to execute an .exe file on client side using javascript, say i want to run an pbrush or calc on client side click using JAVASCRIPT..
I tried this by embedding the following in source page of my web application(ASP.NET)
But i am getting an script error called Automation Server can't create an object
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Dec 16, 2000
I know there are restrictions on the client side in this regard, but thought I would ask. Can you determine a files size on the client? I purchased one of those upload to server applications. But I do not want to send large files. Their application only allows me check the side after sending the file to the server (after the fact). I need to know the size before hand. Just like validating text in a textbox before submission, I want to check the file size on the client before submission. Is there any way to do this on the client?
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Apr 8, 2010
On a client side HTML form, on hitting submit, I would like the data entered in the the form to be saved on the next available line within a .txt file.
For example, a basic HTML Form filled in as follows:
Name: Haze
Age: 400
Info: Hello World!
... on clicking 'Submit', the information would be saved to 'form.txt' on a new line, simply seperated by commas would be fine, example:
Haze, 400, Hello World!
If possible, the date and time the info was saved would really be great as well, example:
01/01/2010 9:41: Haze, 400, Hello World!
I might I cannot find anything on the internet for doing this client side.
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Apr 20, 2010
is there a way to assign an event to a file input so that when a user selects a file to upload the event is triggered and i can check out the file extension? The reason why is simple, i want to perform different actions depending on the type of the file.
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Mar 31, 2011
<html>
This code is not working, i click the size button nothing is happen i checked ActiveXObject is not working i am using IE.
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May 14, 2006
I want to do a check on whether the broswer has finished loading the jpeg before showing the jpeg file to the user. I wish to replace the jpeg with a loading progress bar gif image. How can i start off doing this script?
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Sep 5, 2010
i want to check size of file before send to server by javascript (jquery). who can give me some idea about that.
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Sep 21, 2007
I have a <input type = file> button for uploading a file in my php page. As soon as i select a file from the button, i need the file data to be displayed so that i check whether the file selected has the correct data. How can i do this.
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Sep 1, 2004
I have a form with 2 submit buttons, each with a different value attribute. I can tell which one was clicked after the form has been submitted but I need to check it client side. Here's why: I am doing form validation using the onSubmit event, but I only want to validate if one of the buttons was clicked and not the other.
What's the best way to do this? I thought about having a hidden form field that I set with the onClick of the button I don't want to validate. Is this the best way?
Here are my 2 input tags:
<input type="submit" name="Submit" value="Add reply">
<input type="submit" name="Submit" value="Close">
I tried checking myform.Submit.value in my form validation but it comes up "undefined". I guess it isn't defined until the values are actually posted to the server. Or am I missing something here?
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Sep 1, 2011
I'm trying to put in place a file upload validation check. So at the client-side, the User selects a file. Before uploading, at the GUI, if the file exceeds an imposed limit, it will prompt the User that it exceeds the permitted size for upload.
And if it is within the permitted size, the full file path of the file to be uploaded will then be obtained and then used for the actual upload to the Server.
My program is built on EXTJS and Java, running using Tomcat. Browser restricted to Internet Explorer 7 only.
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Jun 2, 2011
I am using jquery Multifile upload plugin, I want to show the client a pop messages if he/she crosses certain size while uploading files..
<html>
<head>
<script src="/js/jquery.MultiFile.js" type="text/javascript" language="javascript" target="upload_target"></script>
<script>
[code]....
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Oct 4, 2011
This is probably going to show how new I am to jQueryI have a form with an input text field for entering a URL. The user will most likely paste a URL and I want to automatically verify it's status once the user leaves the field. Basically just make sure the page loads ok.I've found dozens of topics that are close to this, but my lack of jQuery skills is hindering me from adapting any of them properly.
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Mar 9, 2007
How can I, for example, retrive data from Profile object (or what so
ever) to some variable declared in javascript tag on client side?
For example, let's say I have this code in Some_Page.aspx:
....
Profile.Name = "Some Name";
....
And I have some variable in java script tag:
var someVariable;
How can I get this "Some Name" from Profile.Name to someVariable?
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Jul 6, 2011
I am making a HTML form which will take elements passed from the server. I cant get it to display correctly.
<html><head>
<script type = "text/javascript">
var dict = new Object;
[code]....
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Jan 24, 2011
i want to search the index.xml file throu diff input like combo box and input text shown in the search.html file and output the result in a tale.
search.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html><head><meta content="text/html; charset=ISO-8859-1" http-equiv="content-type">
<title>Search</title>
<script type="text/javascript" src="search%20xml/search%20xml%20with%20mouseover%20table/searchindex.js"></script>
[Code]...
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Mar 20, 2010
I wanna send a file thru the JQuery.load, I want it to work exactly like the regular post without the JQuery. So I can check the $_FILES['file']['error'] in PHP and all its features like I do without using JQuery.
$("#load").load('gerenciar_itens.php',{/* This is where I wanna pass the file. */}, function(data){
alert(data);
});
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Oct 22, 2009
I need to get the filename, basename, dirname using jQuery. if there is any utility that will take care of windows/mac/linux file paths.
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Aug 15, 2011
I have a form with 3 text inputs; onclick I pass their values to another php file to process everything in that file without a refresh, it works fine, but in the same form I also have a input and I need to pass its value to that other file as well, does anybody know how to do it? This is what I have:
function processform(){
$.post('processnewpostForm.php',
{title: newpostform.titleInput.value,
[code]....
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Dec 21, 2010
If a form as an input='file' element, and someone clicks on BROWSE and then changes their mind and clicks CANCEL, if JavaScript can detect that cancel?
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Jul 23, 2005
For the <input type="file">, can I select directory? Multiple directories?
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