在线测试跨域的方法

测试方案，在网页，打开控制台，如下代码

var token= "aaa";
var xhr = new XMLHttpRequest();
xhr.open('GET', 'http://39.106.60.108:40619/api/market/token_status?token_account=0x000000000000000000000000000000000000000e');
xhr.setRequestHeader("x-access-token",token);
xhr.send(null);
xhr.onload = function(e) {
    var xhr = e.target;
    console.log(xhr.responseText);
}

var token= "aaa";
var xhr = new XMLHttpRequest();
xhr.open('GET', 'https://stat.definer.cn/api/market/token_status?token_account=0x000000000000000000000000000000000000000e');
xhr.setRequestHeader("x-access-token",token);
xhr.send(null);
xhr.onload = function(e) {
    var xhr = e.target;
    console.log(xhr.responseText);
}

如果是nginx转发的端口，需要配置！！！

如果代理地址已经允许跨域则不需要这些, 否则报错

如果代理地址已经允许跨域则不需要这些, 否则报错

# 直接请求nginx也是会报跨域错误的这里设置允许跨域
# 如果代理地址已经允许跨域则不需要这些, 否则报错(虽然这样nginx跨域就没意义了)
add_header Access-Control-Allow-Origin *;
add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';

if ($request_method = 'OPTIONS') {
			return 204;
}

然后就是下面的配置

server {
	listen       80; 
	server_name  192.168.16.190;
	root   /home/fastdfs/file/data;
	index  index.htm index.html;
	add_header 'Access-Control-Allow-Origin' '*';
	add_header 'Access-Control-Allow-Credentials' 'true';
	add_header Cache-Control private;
	add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
	add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
	
	location / {
		# 此处用于处理 H5 的 History时 重写的问题
		if (!-e $request_filename) {
			rewrite ^(.*) /index.html last;
			break;
		}
	}
	
	# 代理服务端接口
	location /api {
		if ($request_method = 'OPTIONS') {
			add_header Access-Control-Allow-Origin *;
			add_header Access-Control-Allow-Methods GET,POST,PUT,DELETE,PATCH,OPTIONS;
			return 200;
		}
		proxy_pass http://192.168.16.191:3000/api;   #将真正的请求代理到API 服务地址
	}
	
	location ^~/cross_origin/ {
		rewrite ^/cross_origin/(.*)$ /$1 break;
		if ($request_method = 'OPTIONS') {
			add_header Access-Control-Allow-Origin *;
			add_header Access-Control-Allow-Methods GET,POST,PUT,DELETE,PATCH,OPTIONS;
			return 200;
		}
		proxy_pass http://192.168.16.191:3000/cross_origin ;   #将真正的请求代理到API 服务地址
	}
}