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How does Nginx implement cross-domain access? Implementation of Nginx cross-domain access
How does Nginx implement cross-domain access? Implementation of Nginx cross-domain access
This article introduces to you how Nginx implements cross-domain access? The implementation of Nginx cross-domain access has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
1. What is cross-domain
Cross-domain refers to requesting resources of another domain name from a web page of one domain name. For example, request the resources of www.b.com from the www.a.com page.
#Browsers generally prohibit cross-domain access by default. Because it is insecure, it is prone to CSRF (cross-site request forgery) attacks.
2. Nginx controls the browser to allow cross-domain access
Nginx adds HTTP such as Access-Control-Allow-Origin, Access-Control-Allow-Methods, Access-Control-Allow-Headers, etc. header information to control browser caching.
"Access-Control-Allow-Origin" Set the website that is allowed to initiate cross-domain requests
"Access-Control-Allow-Methods" Set the HTTP methods that are allowed to initiate cross-domain requests
"Access -Control-Allow-Headers" setting allows cross-domain requests to include Content-Type headers
ngx_http_headers_module
Syntax
Syntax: add_header name value [always]; Default: — Context: http, server, location, if in location
Application example
1. vim conf.d/cross_site.conf
# 配置网站www.a.com
server {
server_name www.a.com;
root /vagrant/a;
# 允许 http://www.b.com 使用 GET,POST,DELETE HTTP方法发起跨域请求
add_header Access-Control-Allow-Origin http://www.b.com;
add_header Access-Control-Allow-Method GET,POST,DELETE;
}
# 配置网站www.b.com
server {
server_name www.b.com;
root /vagrant/b;
}
# 配置网站www.c.com
server {
server_name www.c.com;
root /vagrant/c;
}2. nginx -s reload Reload nginx configuration file
3. Create /vagrant/a/a.txt, /vagrant/b/index.html, /vagrant/c/index .html file
- ##vim /vagrant/a/a.txt
Hello,I'm a!
- / vagrant/b/index.html
nbsp;html>
<meta>
<title>Ajax跨站访问b</title>
<h1 id="Ajax跨站访问b">Ajax跨站访问b - </h1>
<script></script>
<script>
$(function(){
$.ajax({
url: "http://www.a.com/a.txt",
type: "GET",
success: function (data) {
$('h1').append(data);
},
error: function (data) {
$('h1').append('请求失败！');
}
});
})
</script>
- /vagrant/c/index.html
nbsp;html>
<meta>
<title>Ajax跨站访问c</title>
<h1 id="Ajax跨站访问c">Ajax跨站访问c - </h1>
<script></script>
<script>
$(function(){
$.ajax({
url: "http://www.a.com/a.txt",
type: "GET",
success: function (data) {
$('h1').append(data);
},
error: function (data) {
$('h1').append('请求失败！');
}
});
})
</script>
4. Configure the client’s hosts file (if you use a real domain name, you can ignore it)
windows:C:\Windows\System32\drivers\etc\hostslinux:
/etc/hosts
192.168.33.88 www.a.com 192.168.33.88 www.b.com 192.168.33.88 www.c.com
5. The browser accesses http://www.b.com/index.html and http://www.c.com/index.html
- ##http://www.b.com/index.html
-
Ajax跨站访问b - Hello,I'm a!
Copy after login
- http://www.c .com/index.html
-
Ajax跨站访问c - 请求失败！
Copy after loginOpen the developer mode Console of the browser, and you can also find an error on the page http://www.c.com/index.html:
Failed to load http://www.a.com/a.txt: The 'Access-Control-Allow-Origin' header has a value 'http://www.b.com' that is not equal to the supplied origin. Origin 'http://www.c.com' is therefore not allowed access.
Recommended related articles:
Nginx as a static resource web service to control browser cache and implement anti-leeching Nginx as a static resource web service and static resource compressionThe above is the detailed content of How does Nginx implement cross-domain access? Implementation of Nginx cross-domain access. For more information, please follow other related articles on the PHP Chinese website!
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