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XMLHttpRequest is undefined

  • 2 replies
  • 3 have this problem
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  • Last reply by AMArostegui

AMArostegui
AMArostegui
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I'm writing a bootstrap Add-On for Thunderbird 24.3.0 on a Ubuntu 13.10 computer.

When trying to execute the following code snippet (taken for Mozilla Developer Network) 

    var req = new XMLHttpRequest();
    req.open('GET', 'http://www.mozilla.org/', false); 
    req.send(null);
    if(req.status == 200)
        dump(req.responseText);

I get "ReferenceError: XMLHttpRequest is not defined" on the Error Console when trying to create the object.

This problem looks very similar to Firefox's:

https://support.mozilla.org/en-US/questions/987100

I'm writing a bootstrap Add-On for Thunderbird 24.3.0 on a Ubuntu 13.10 computer. When trying to execute the following code snippet (taken for Mozilla Developer Network) var req = new XMLHttpRequest(); req.open('GET', 'http://www.mozilla.org/', false); req.send(null); if(req.status == 200) dump(req.responseText); I get "ReferenceError: XMLHttpRequest is not defined" on the Error Console when trying to create the object. This problem looks very similar to Firefox's: https://support.mozilla.org/en-US/questions/987100

Chosen solution

Hmm, could it be some change in the SDK?

It might be worth checking on this forum: http://forums.addons.mozilla.org/

Read this answer in context 👍 2

All Replies (2)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
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Chosen Solution

Hmm, could it be some change in the SDK?

It might be worth checking on this forum: http://forums.addons.mozilla.org/

AMArostegui
AMArostegui Question owner
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I think I found out the answer:

You cannot instantiate that way within a Javascript module. Should use

var req = Components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"] 

                   .createInstance(Components.interfaces.nsIXMLHttpRequest);

instead.

Anyway, thanks for letting me know about the forum. Looks helpful.