Ajax GET request-time cache handling solution _ajax related

Source: Internet
Author: User

The example in this article describes the caching processing solution for Ajax get requests. Share to everyone for your reference. The specific analysis is as follows:

Many times in the Ajax get method call, because the cache is not timely access to the correct data, here is to analyze the way to solve this problem:

1. Add a random number after the URL, such as:

Copy Code code as follows:
Http://www.test.com?a=a&b=b&r=Math.random ();

2. Add a timestamp after the URL:

Copy Code code as follows:
var t = new Date (). GetTime ();

3. Use the setRequestHeader function of the XMLHttpRequest object to set the If-modified-since value to 0, as

Copy Code code as follows:
Xmlhttp.setrequestheader (' If-modified-since ', 0);

Here to understand the meaning of if-modified-since

4. Using the header function of PHP

Copy Code code as follows:
Header (' Cache-control:no-cache, Must-revalidate ');

Setting does not use caching

I hope this article will help you with your AJAX programming.

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.