I have checked online including this web site and have been unable to find a solution to my problem.
I am trying to us the JQuery File Upload plugin and have made some amendments to restrict the files types to CSV and XML, as well as restricting to 1 file only and up to 5MB per file. These new properties work fine and it also works fine in all browsers except IE.
I have bound an event on the fileupload event that will render the CSV as a HTML table. This works fine in all browsers except IE. In IE, it either throws an error or freezes with the green progress bar at the top right displaying the following information:
7.123775601068567 bit/s | 00:00:00 | 100.00 % | 0.00 KB / 0.00 KB
It actually looks like it is hanging as it does not seem to complete the upload. And when I reload the same page it shows the correct display! without the progress bar!
UPDATE: The code is fine when I simply upload the CSV file. Now the problem appears when I attempt to include a callback option. It seems related to the 'fileuploadcompleted' event, which I updated from 'fileuploaddone', which has improved the result but still not right and does not execute and render the HTML table at all (See link above for example)
// Load existing files:
$('#fileupload').each(function () {
var that = this;
$.getJSON(this.action, function (result) {
if (result && result.length) {
$(that).fileupload('option', 'done')
.call(that, null, {result: result});
}
});
}).bind('fileuploadcompleted', function (e, data) {
//console.log('fileuploaddone:start');
var $filename = $('#fileupload td.name').text().trim();
//console.log('filename is ' + $filename);
$.get('../jQuery-File-Upload/server/php/files/' + $filename, function(data) {
$('#CSVSource').html('<pre>' + data + '</pre>');
});
$('#CSVTable').CSVToTable('../jQuery-File-Upload/server/php/files/' + $filename,{
loadingImage: 'img/loading-table.gif',
startLine: 0 }).bind("loadComplete",function() {//for future use});
}).bind('fileuploaddestroy', function (e, data) {
//console.log('fileuploaddestroy');
$('div#CSVTable').fadeOut(1000);
});
Any ideas how to get this working in IE?
Many thanks.
ok the issue is resolved after much digging, though solution was quite simple and has been covered here:
How to deal with ie8 jquery object doesn't support this property or method Error?
So basically in the code above I should have been using the JQuery version of trim, which was updated as follows:
var $filename = $.trim($('#fileupload td.name').text());
posting the question in some strange way helped me resolve this issue :)
As a side note: I've also noticed that if you have htaccess restrictions on the folder where your 'upload' web page is, you can also have different behaviour in IE. For example, with access restrictions set, the upload works though it does not display the actual file uploaded, despite uploading. And when you delete the file, it asks you to log in.
Related
Update:
Please see the answer noted below as, ultimately, the problem had nothing to do with jsquery.
=============
Issue:
I submit an object to jquery to convert into a serialized string that will become part of a "POST" request to a server, and the data returned from the serialization request is different than the data sent on many occasions.
An example:
The JavaScript code that implements the server POST request:
function send_data(gpg_data) {
var query_string;
query_string = '?' + $.param(gpg_data, traditional = true);
console.log('gpg_data =', gpg_data)
console.log('query_string =', query_string);
$.post(server_address + query_string);
return;
}
This is the structure sent to the jquery param() function.
(copied from the browser console in developer mode.)
gpg_data =
{controller_status: 'Connected', motion_state: 'Stopped', angle_dir: 'Stopped', time_stamp: 21442, x_axis: 0, …}
angle_dir: "Stopped"
controller_status: "Connected"
force: 0
head_enable: 0
head_x_axis: 0
head_y_axis: 0
motion_state: "Stopped"
time_stamp: 21490
trigger_1: 0
trigger_2: 0
x_axis: 0
y_axis: "0.00"
. . . and the returned "query string" was:
query_string = ?controller_status=Connected&motion_state=Stopped&angle_dir=Stopped&time_stamp=21282&x_axis=0&y_axis=0.00&head_x_axis=0&head_y_axis=0&force=0&trigger_1=1&trigger_2=1&head_enable=0
The data received by the server is:
ImmutableMultiDict([('controller_status', 'Connected'), ('motion_state', 'Stopped'), ('angle_dir', 'Stopped'), ('time_stamp', '21282'), ('x_axis', '0'), ('y_axis', '0.00'), ('head_x_axis', '0'), ('head_y_axis', '0'), ('force', '0'), ('trigger_1', '1'), ('trigger_2', '1'), ('head_enable', '0')])
For example, note that "trigger_1" returns 1 when the data sent to it is a zero.
I have tried setting the query to "traditional = true" to revert to an earlier style of query handling as some articles suggested - which did not work. I tried this with jquery 3.2 and 3.6.
I am not sure exactly how jquery manages to munge the data so I have no idea where to look.
I have looked at my script and at the unpacked jquery code, and I can make no sense out of why or how it does what it does.
Any help understanding this would be appreciated.
P.S.
web searches on "troubleshooting jquery" returned very complex replies that had more to do with editing e-commerce web pages with fancy buttons and logins than with simply serializing data.
P.P.S.
I am tempted to just chuck the jquery and write my own serialization routine. (grrrr!)
===================
Update:
As requested, a link to the browser-side context.
To run: unpack the zip file in a folder somewhere and attach an analog joystick/gamepad to any USB port, then launch index.html in a local browser. Note that a purely digital gamepad - with buttons only or with a joystick that acts like four buttons - won't work.
You will want to try moving joystick axes 1 and 2, (programmatically axes 0 and 1) and use the first (0th) trigger button.
You will get a zillion CORS errors and it will complain bitterly that it cannot reach the server, but the server side context requires a GoPiGo-3 robot running GoPiGo O/S 3.0.1, so I did not include it.
Note: This does not work in Firefox as Firefox absolutely requires a "secure context" to use the Gamepad API. It does work in the current version of Chrome, (Version 97.0.4692.99 (Official Build) (64-bit)), but throws warnings about requiring a secure context.
Please also note that I have made every attempt I know how to try to troubleshoot the offending JavaScript, but trying to debug code that depends on real-time event handling in a browser is something I have not figured out how to do - despite continuous searching and efforts. Any advice on how to do this would be appreciated!
======================
Update:
Researching debugging JavaScript in Chrome disclosed an interesting tidbit:
Including the line // #ts-check as the first line in the JavaScript code turns on additional "linting" (?) or other checks that, (mostly) were a question of adding "var" to the beginning of variable declarations.
However. . . .
There was one comment it made:
gopigo3_joystick.x_axis = Number.parseFloat((jsdata.axes[0]).toFixed(2));
gopigo3_joystick.y_axis = Number.parseFloat(jsdata.axes[1]).toFixed(2);
I could not assign gopigo3_joystick.y_axis to a string object, (or something like that), and I was scratching my head - that was one of the pesky problems I was trying to solve!
If you look closely at that second line, you will notice I forgot a pair of parenthesis, and that second line should look like this:
gopigo3_joystick.y_axis = Number.parseFloat((jsdata.axes[1]).toFixed(2));
Problem solved - at least with respect to that problem.
I figured it out and it had nothing to do with jquery.
Apparently two things are true:
The state of the gpg_data object's structure is "computed", (snapshot taken), the first time the JavaScript engine sees the structure and that is the state that is saved, (even though the value may change later on). In other words, that value is likely totally bogus.
Note: This may only be true for Chrome. Previous experiments with Firefox showed that these structures were updated each time they were encountered and the values seen in the console were valid. Since Firefox now absolutely requires a secure context to use the gamepad API, I could not use Firefox for debugging.
I was trying to be "too clever". Given the following code snippet:
function is_something_happening(old_time, gopigo3_joystick) {
if (gopigo3_joystick.trigger_1 == 1 || gopigo3_joystick.head_enable == 1) {
if (old_time != Number.parseFloat((gopigo3_joystick.time_stamp).toFixed(0))) {
send_data(gopigo3_joystick)
old_time = gopigo3_joystick.time_stamp
}
}
return;
}
The idea behind this particular construction was to determine if "something interesting" is happening, where "something interesting" is defined as:
A keypress, (handled separately)
A joystick movement if either the primary trigger or the pinky trigger is pressed.
Movement without any trigger pressed is ignored so that if the user accidentally bumps against the joystick, the robot doesn't go running around.
Therefore the joystick data only gets updated if the trigger is pressed. In other words, trigger "release" events - the trigger is now = 0 - are not recorded.
The combination of these two events - Chrome taking a "snapshot" of object variables once and once only, (or not keeping them current) - and the trigger value persisting, lead me to believe that jquery was the problem since the values appeared to be different on each side of the jquery call.
I'm currently making my first effort into porting a webpage to Wordpress, so forgive my inexperience on the subject.
In my page, I have the following code:
function workLoad() {
$.ajaxSetup({ cache: false });
$('.thumb-unit').click(function() {
var $this = $(this),
newTitle = $this.find('strong').text(),
newFolder = $this.data('folder'),
spinner = 'Loading...',
newHTML = 'work/'+ newFolder +'.html';
$('.project-load').html(spinner).load(newHTML);
$('.project-title').text(newTitle);
});
}
In the past, this has worked fine hosted both locally and on Github. However, running my wordpress build locally through MAMP gives me the following error:
jquery-2.1.1.min.js:4 GET http://localhost/work/proj-1.html?_=1485348127113 404 (Not Found)
The URL should be fine, except for the part where it adds the ?_=(number). I'm not familiar with this behavior or what causes it. I tried changing work/ to /work/, since the dir is in the root folder, but that didn't solve it. I also have tried changing the variable to
newHTML = '< ?php bloginfo('template_directory')' + '/work/'+ newFolder +'.html';without the space after the opening bracket but to no avail. I also tried putting that bit in its own var, but it keeps adding ?_=1485348127113 to the URL of the html file I want to load, resulting in a 404 error.
What causes this? Thanks in advance for any advice you could share.
This timestamp is added for You to obtain the latest version of the file using ajax load.
If You want to disable this behaviour, You should set
$.ajaxSetup({
cache: true
});
This will enable caching and Your request would not contain the ?_=1485348127113 part anymore. This parameter should not cause the 404 not found error. Please check your path.
I've implemented this UX for ExtJs 4 (it generates an Excel file from an ExtJs 4 grid or store)
http://druckit.wordpress.com/2013/10/26/generate-an-excel-file-from-an-ext-js-4-grid/#comment-982
and it works perfectly in Chrome, however I keep getting this error " the data area passed to a system call is too small" in any version of IE
Here is the fragment of code that seems to be the problem, the full code is in the link above.
var el = Ext.DomHelper.append(gridEl, {
tag: "a",
download: title + "-" + Ext.Date.format(new Date(), 'Y-m-d Hi') + '.xls',
//download: 'descarga.xls',
href: location
});
el.click(); //this line seems to be causing the error
Ext.fly(el).destroy();
}
I know there is downlodify and other options (like server side generating) but they are not an option at this point for me.
Is there any chance I can make this UX work in IE?
Can anyone point me in the right direction ?
Thank you.
Using the listed method will not work well with IE because IE has a limit of 2083 characters. If you debug the code in this fiddle https://fiddle.sencha.com/#fiddle/17j you'll notice that the location variable is well over 5000 characters and also fails in IE. I'm assuming the issue is the same if you debug your code as well.
Ok, so I need to find the source code of a particular javascript function on a website. (The specifics do not really matter unless there is no way to do what it is that I am asking)
I can see the function call in a link of html code
onclick="inbox.sendMessage();"
I know that the function does work because if I use a plugin a can call the function on that page, however, I have searched every .js file is referenced in that page, and none of them contain a function called sendMessage.
What I am asking is, is there a way to follow the code back to the source, perhaps if there was a way to debug the html and break when the onclick is triggered and then step into the function to see its source, but I do not know how I can do that or if it is even possible. Any help will be greatly appreciated, Thanks.
I guess you could do :
inbox.sendMessage
In the webconsole. (the function name without the parenthesis)
It will print out the source code of the function.
I usually use Opera, and in that at least this is what I do:
Open Opera Dragonfly (Ctrl + Shift + I).
Click on the HTML tag with the onclick handler.
Go to the listeners tab in the right hand side column.
See the listener for the click event. It shows you the file and line number.
sendMessage could be declared as:
var inbox{
sendMesssage:function(){
}
}
//or
function inbox(){
this.sendMessage=function(){
}
}
// or
inbox.sendMessage=function(){}
// or ...
So looking for "sendMessage(" or "function sendMessage" will not find you anything.
In chrome, Internet Explorer and Firefox (with firebug) you can hit F12 and go to debug, there you can check the scripts that have been loaded as there might have been scripts loaded dynamically.
#!/usr/bin/env ruby
Dir::glob("*").each do |name|
lineCount = 1
File.open(name, "r").each do |line|
puts "\nFile name: " + name + "\nline: " + lineCount.to_s if line =~ /inbox.sendMessage/ && name != "findfunction.rb"
lineCount += 1
end
end
Wrote a quick ruby script to help you out. To execute, first make sure you have a ruby interpreter on your machine then place the script in the directory with all your relevant files. load up a command line terminal, navigate to said directory and type "ruby findfunction.rb".
It will tell you all instances (files + line number) of "inbox.sendMessage".
I'm currently working on a WordPress addition which loads full post content (normally it shows exceprts) when asked to. I did my code like this:
$(".readMore").click(function() {
var url = $(this).attr("href");
$(this).parent("p").parent("div").children("div.text").slideUp("slow", function () {
$(this).load(url + " .text", function(){
$(this).slideDown("slow");
});
});
$(this).parent("p").fadeOut();
return false; });
And it works. But I don't want images to be loaded. I tried .text:not(img), but it didn't worked. How can I do this?
The trick, of course, is preventing the images from being downloaded unnecessarily by the user's browser; not displaying them is easy.
I only have two browsers were it's easy and convenient to tell what's downloading: Chrome and Firefox+Firebug. In my tests, Martin's solution using *:not(img) results in the images being downloaded (although not displayed) in both Chrome and Firefox+Firebug. (I emphasize "Firefox+Firebug" because Firebug can change the behavior of Firefox on occasion, and so it may well be changing its behavior here, although I don't think it is; more on that below.)
It took some tweaking, but this seems to do the trick (more on testing below):
$.ajax({
url: url,
success: function(data) {
var div = $("<div>").html(data);
if (stripImages) {
// Find the images, remove them, and explicitly
// clear the `src` property from each of them
div.find("img").remove().each(function() {
this.src = "";
});
}
$(targetSelector).append(div.children());
},
error: function(jxhr, status, err) {
display("ajax error, status = " + status + ", err = " + err);
}
});
Live example The "Include big image" checkbox includes a large file from NASA's Astronomy Picture of the Day (APOD).
The key there was setting the src of the img elements to "". On Chrome, just removing the elements was enough to prevent Chrome starting the download of the images, but on Firefox+Firebug it not only started downloading them, but continued even when the download took considerable time. Clearing the src causes Firefox to abort the download (I can see this in the Firebug Net console).
So what about IE? Or Firefox without Firebug? I only did unscientific testing of those, but it's promising: If I run my live example of Martin's solution on either IE or Firefox without Firebug in a VM, I see the VM's network interface working hard, suggesting that it's downloading that big APOD picture. In contrast, if I run my solution above in that same environment (with caches cleared, etc., etc.), I don't see the VM network interface doing that work, suggesting that the download is either not being started or is being aborted early on.
.text *:not(img) will select every descendant from .text that is not an image, so in theory it should work.