Need a cross-browser alternative for ActiveXobject

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Hi I am using this code fragment

JavaScript

var fso = new ActiveXObject("Scripting.FileSystemObject");
var s = fso.OpenTextFile(dir + "modules.txt", 2, true, -2);
s.WriteLine(tobewritten);
s.Close();
fso = s = null;
//alert (s);
if (s = "null")
    alert("Records updated");
window.location.href = 'main.html';

This is working fine with IE. But I need a solution to get it worked in Firefox. What should I do

Posted 10-Oct-13 20:52pm

NupurParashar

Updated 10-Oct-13 21:57pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Accepted Answer · 2013-10-10T22:08:00

Solution 1

Go through the Blog - Cross browser XMLHttpRequest[^]

Quote:

JavaScript

try {
    // test to see if XMLHttpRequest is defined
    XMLHttpRequest.DONE;
}
catch (e) {
    XMLHttpRequest = new Object();
    // define also all the constants
    XMLHttpRequest.UNSENT = 0;
    XMLHttpRequest.OPENED = 1;
    XMLHttpRequest.HEADERS_RECEIVED = 2;
    XMLHttpRequest.LOADING = 3;
    XMLHttpRequest.DONE = 4;
}

/** Creates new instance of the XMLHttpRequest object */
XMLHttpRequest.newInstance = function() {
    var xmlHttp = null;
    // use the ActiveX control for IE5.x and IE6
    try {
        xmlHttp = new ActiveXObject("MSXML2.XMLHTTP");
    } catch (othermicrosoft){
        try { 
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        } 
        catch (native) {
            // If IE7, Mozilla, Safari, etc: Use native object
            xmlHttp = new XMLHttpRequest();
        } 
    } 

    return xmlHttp;
};

Posted 10-Oct-13 22:08pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

NupurParashar 11-Oct-13 5:19am

I cannot replace txt with XML as there are around 600 pages where I am using "modules.txt" filename. And XMLHTTP is used for writing XML.. If i am not wrong? I have no option other than using a txt file. So I need a way to write a txt file only.. which is cross-browser compatible.

enhzflep 11-Oct-13 5:33am

You can request anything with an XMLHttpRequest. Although it's likely a task for later, if you've got "modules.txt" hard-coded into 600 different pages you need to review your approach - the current one couldn't reasonably be characterized as "doing it right".

This sounds like the perennial "XY problem" - that is, you have a problem, X. You see Y as a solution to X, so you ask "How do I do Y?" Far too often, a perfect solution to Y is useless, since the solution to X is actually Z.

In closing, I suggest you explain what you're trying to achieve - what is problem X?

NupurParashar 11-Oct-13 5:40am

See its a demo project. Where we have no server side. We have to work only on client.and as far as hard-coding is concerned.. we had to do it since no databases are there and we have hard-coded the complete demo project to give overview of real product to the end customers.Even I dont have much options other than getting this ActiveXobject worked in FF.

enhzflep 11-Oct-13 6:13am

Well, if you have 600 places you need to read/write data, you'd be much better off having 600 calls to _a function_ that read/wrote data. That way, you could replace the function body once and have it result in different functionality (or a different implementation of the same functionality)

You actually do have access to databases if your browser if HTML5 compliant. Have a look into WebSQL - it may suit your needs.

I'd love to help, but you've supplied no extra information with which to do so. Telling me why you've chosen solution Y for an (as yet) unkown to fellow readers due to "Order from Boss" still doesn't give the people you're asking for help any ability to deliver it.

Again, what are you trying to do? I really (really, really, _really_) dont care why or whom says that solution Y is the answer to problem X. In order for _me_ to be able and prepared to help, I need more info. You're perfectly entitled to wait until(if?) a better response comes from another member. :)

NupurParashar 11-Oct-13 6:50am

Ok in your language X is I want an alternative for activeXobject which should be cross browser compatible. Please check my code I have pasted in my question. I need a code which is cross browser compatible and have to write a text file. As ActiveXobject is supported by IE only. So its not the correct approach as its not working in Firefox.

enhzflep 11-Oct-13 7:11am

I appreciate your response NupurParashar, really I do.

Still though, there is (from my perspective) a clear failing in my efforts at communication. To use my XY analogy, you've only given what you think to be the solution - Y.

When I ask what is X? It is hoped that you would understand this to mean *the step before* you conclude that you need to read/write files with the browser.

You've mentioned local-machines and servers. You've also mentioned SQL. From these two crumbs of information, it seems likely to me that you wish to demo a database-driven website.

If the aim was to display information that was already held by the system, I can't see a need to write anything. Since there is a (perceived?) need to write something, it also seems like a reasonable assumption that this freshly-written data will also need to be made available to the same program at a later stage - whether it be 5sec, 5min, tommorow or next week, etc.

Soooo, when I ask "what is problem X?", everything you've written this far leads me to believe that the answer would be something like:

"We want to demo an air-line/hotel/event booking system. We need to check the availability of locations/equipment such that a requested booking may be confirmed or denied. When a new booking is entered, it is expected that this will be recognized by the system and that further attempts to use the location/equipment during a particular time-slot will fail"

That kind of an answer indicates
(a) the need for a database or database-like storage mechanism
(b) the need to perform basic CRUD operations - (Create, Read, Update, Destroy) on the data
(c) the data you're dealing with and how you need to use it.