Because of security restrictions (homology policy, where JavaScript or cookies can only access content under the same domain), two scenarios for Ajax Cross-domain requests
Scenario One: Jsonp (JSON with Padding)
But one drawback of JSONP is that it does not support get passes
Scenario Two: CORS (cross-domain resource sharing, cross-origin Resource sharing)
This scenario supports post submission
Let's say that we are in HTTP://WWW.A domain name, COM domain name Ajax request http://www.111cn.net domain name under the data, if using Cors to implement, Ajax Cross-domain request.
Just in the http://www.111cn.net domain to be added in the requested PHP script header
Header ("ACCESS-CONTROL-ALLOW-ORIGIN:HTTP://WWW.A domain name. com");
Allow HTTP://WWW.A domain name. com cross domain access to http://www.111cn.net domain
Code instance:
[index.html file under HTTP://WWW.A domain name. com domain name]
| The code is as follows | Copy Code |
| <!--This domain name is under HTTP://WWW.A domain name. com Domain name--> |
|
[server.php file under http://www.111cn.net domain name]
| The code is as follows | Copy Code |
<?php |
|
[Firefox browser access http://www.a domain name. com]
So the question is, how do you use Cors to solve this Ajax cross-domain problem?
As long as the http://www.111cn.net domain name under the server.php file in the
Header ("ACCESS-CONTROL-ALLOW-ORIGIN:HTTP://WWW.A domain name. com");
Note is removed. Remove and then use the browser to access the HTTP://WWW.A domain name. com
Other
If you put the PHP file
Header ("access-control-allow-origin:*"); In this case, the task is a domain can go to Ajax request this file
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