Focus with Cross-domain Ajax in Opera
You'll need Opera 9.62 to see what this is all about... Because that is the only browser that behaves strange when I do cross-sub-domain JavaScript calls (with Ajax involved). Please consider the following three simple files and place them at appropriate domains.
foo.html (parent of boo.html iframe) at foo.example.com
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>foo</title>
<script type='text/javascript'>
document.domain = 'example.com';
function sendRequest() {
window.frames['boo'].sendRequest();
}
</script>
<head>
<body>
<input type="submit" value="sendRequest" onclick="se开发者_Go百科ndRequest();" />
<iframe name="boo" src="http://boo.example.com/boo.html"></iframe>
</body>
</html>
boo.html (iframe of foo.html) at boo.example.com
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>boo</title>
<script type='text/javascript'>
document.domain = 'example.com';
function sendRequest() {
var request = null;
if (window.XMLHttpRequest) {
request = new XMLHttpRequest();
} else {
request = new ActiveXObject('Microsoft.XMLHTTP');
}
if (request) {
request.open('GET', 'http://boo.example.com/helloworld.php', true);
request.onreadystatechange = function() {
if (request.readyState == 4) {
var result = request.responseText;
alert(result);
}
}
request.send('');
}
}
</script>
<head>
<body>
</body>
</html>
helloworld.php at boo.example.com
<?php
echo 'Hello World!';
?>
If you test the above-stated code in browsers other than Opera (tested on v9.62), it works like a charm (I have tested in Safari, Firefox, Chrome). In Opera, it does not work and an error with security violation message is thrown. Does anybody know what the matter is? I have found out a solution to the problem and I will post it here a bit later (I'd also like to see your solutions), but I'd like to learn more about the issue as well - can anybody explain it?
UPDATE: I just tested it on the newest Opera 10.63 and it does not have such a problem. So you'll definitely need to use Opera v9.62 to observe the problem.
Think that version of Opera does not support document.domain
I know that none of the Opera versions before 9 supported it, so I'm guessing 9.62 doesn't support it either.
Try setting domain to boo.example.com, and see if that works, just in case 9.62 does support it.
According to http://www.opera.com/docs/specs/opera9/xhr/, it does support XMLHttpRequest just fine, and since it follows W3C specifications, var request = new XMLHttpRequest() should work fine.
I was going to suggest you implement CORS but that seems not to be implemented yet: http://dev.opera.com/forums/topic/693452
Let me show you the code that does work in Opera 9.62...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>boo</title>
<script type='text/javascript'>
document.domain = 'example.com';
function sendRequest() {
setTimeout(function() {
var request = null;
if (window.XMLHttpRequest) {
request = new XMLHttpRequest();
} else {
request = new ActiveXObject('Microsoft.XMLHTTP');
}
if (request) {
request.open('GET', 'http://boo.example.com/helloworld.php', true);
request.onreadystatechange = function() {
if (request.readyState == 4) {
var result = request.responseText;
alert(result);
}
}
request.send('');
}
}, 1);
}
</script>
<head>
<body>
</body>
</html>
加载中,请稍侯......
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