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fix jsonp bug in IE9-: Cannot read property 'responseText' of undefined #268

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fix jsonp bug in IE9-: Cannot read property 'responseText' of undefined #268

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21 changes: 10 additions & 11 deletions reqwest.js
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Expand Up @@ -12,7 +12,7 @@

var context = this

if ('window' in context) {
if ('document' in context) {
var doc = document
, byTag = 'getElementsByTagName'
, head = doc[byTag]('head')[0]
Expand All @@ -25,7 +25,6 @@
}
}


var httpsRe = /^http/
, protocolRe = /(^\w+):\/\//
, twoHundo = /^(20\d|1223)$/ //http://stackoverflow.com/questions/10046972/msie-returns-status-code-of-1223-for-ajax-request
Expand All @@ -34,7 +33,6 @@
, requestedWith = 'X-Requested-With'
, uniqid = 0
, callbackPrefix = 'reqwest_' + (+new Date())
, lastValue // data stored by the most recent JSONP callback
, xmlHttpRequest = 'XMLHttpRequest'
, xDomainRequest = 'XDomainRequest'
, noop = function () {}
Expand Down Expand Up @@ -65,6 +63,11 @@
if (xhr && 'withCredentials' in xhr) {
return xhr
} else if (context[xDomainRequest]) {
var protocolRegExp = /^https?/;
if (window.location.href.match(protocolRegExp)[0] !== o.url.match(protocolRegExp)[0]) {
throw new Error('XDomainRequest: requests must be targeted to the same scheme as the hosting page.')
// As per: http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
}
return new XDomainRequest()
} else {
throw new Error('Browser does not support cross-origin requests')
Expand Down Expand Up @@ -126,10 +129,6 @@
}
}

function generalCallback(data) {
lastValue = data
}

function urlappend (url, s) {
return url + (/\?/.test(url) ? '&' : '?') + s
}
Expand All @@ -154,7 +153,9 @@
url = urlappend(url, cbkey + '=' + cbval) // no callback details, add 'em
}

context[cbval] = generalCallback
context[cbval] = function(data) {
script.data = data
}

script.type = 'text/javascript'
script.src = url
Expand All @@ -173,8 +174,7 @@
script.onload = script.onreadystatechange = null
script.onclick && script.onclick()
// Call the user callback with the last value stored and clean up values and scripts.
fn(lastValue)
lastValue = undefined
fn(script.data)
head.removeChild(script)
loaded = 1
}
Expand All @@ -187,7 +187,6 @@
abort: function () {
script.onload = script.onreadystatechange = null
err({}, 'Request is aborted: timeout', {})
lastValue = undefined
head.removeChild(script)
loaded = 1
}
Expand Down