Analysis of jsonp cross-domain access (front-end and back-end)

The content of this article is about the analysis of jsonp cross-domain access (front-end and back-end). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

1. What is cross-domain access

Give a chestnut: In website A, we hope to use Ajax to obtain specific content in website B. If website A and website B are not in the same domain, then there will be a cross-domain access problem. You can understand that two domain names cannot send requests or request data across domain names, otherwise it will be unsafe. Cross-domain access violates the same-origin policy. For detailed information on the same-origin policy, you can click on the following link: Same-origin_policy; Domain name or IP) resources.

2. What is JSONP

JSONP (JSON with Padding) is a "usage mode" of JSON that can be used to solve the problem of cross-domain data access by mainstream browsers.

Due to the same-origin policy, generally speaking, web pages located at server1.example.com cannot communicate with servers other than server1.example.com, and the

Latest Articles by Author

• What is programming?
  2019-04-16 16:04:28
• The shortcut key for search is the ctrl key plus what key
  2020-09-15 11:26:00
• What is added to the cut shortcut key ctrl?
  2020-09-10 14:26:14
• What is it's profession?
  2020-09-08 11:06:15
• What does ctrl plus save?
  2020-09-09 09:46:36
• What is the shortcut key for ctrl+t?
  2020-10-12 14:51:04
• How to use PS ruler?
  2020-09-10 14:40:02
• Who is suitable for learning programming?
  2019-04-24 16:20:55
• What is the shortcut key for reverse selection in PS?
  2020-10-13 11:40:03
• How to add line break between two inline elements
  2019-04-15 14:06:21

Latest Issues

function_exists() cannot determine the custom function Function test () {return true;} if (function_exists ('test')) {echo "test is function...

From 2024-04-29 11:01:01

0

3

2061

How to display the mobile version of Google Chrome Hello teacher, how can I change Google Chrome into a mobile version?

From 2024-04-23 00:22:19

0

11

2222

The child window operates the parent window, but the output does not respond. The first two sentences are executable, but the last sentence cannot be implemented.

From 2024-04-19 15:37:47

0

1

1872

There is no output in the parent window document.onclick = function(){ window.opener.document.write('I am the output of the child ...

From 2024-04-18 23:52:34

0

1

1753

Where is the courseware about CSS mind mapping? Courseware

From 2024-04-16 10:10:18

0

0

1781

Related Topics

More>

• Three methods of gpu virtualization
• How to open .dat files
• What does Xiaohongshu do?
• Excel table slash divided into two
• How to solve invalid synrax
• What are the dos commands?
• can not open webpage
• How to set startup items at startup