跨域访问（nginx）

注意：jsonp解决跨域只支持get 请求。

$.ajax({
    url: 'http://www.domain2.com:8080/login',
    type: 'get',
    dataType: 'jsonp',  // 请求方式为jsonp
    jsonpCallback: "onBack",    // 自定义回调函数名
    data: {}
});

需要自己写个回调函数
function onBack(){
    
}




后台接口注意：

@RequestMapping("/currUser")
@ResponseBody
public Object currUser(String jsoncallback) {
Object currentUser = SecurityUtils.getSubject().getPrincipal();
String userName = null;
if (currentUser != null) {
Class<?> clazz = currentUser.getClass();
if (clazz.equals(SysUser.class)) {
userName = ((SysUser) currentUser).getUserName();
} else if (clazz.equals(WxUser.class)) {
userName = ((WxUser) currentUser).getNickName();
}
}
if (jsoncallback == null) {
return userName == null ? failureJsonResult("没有登陆")
: successJsonResult(userName);
} else {
MappingJacksonValue value = new MappingJacksonValue(
userName == null ? failureJsonResult("没有登陆")
: successJsonResult(userName));
value.setJsonpFunction(jsoncallback);
return value;
}
}



 context.Response.Write(jsonp+"("+json.ToString().TrimEnd(',') + "],'"+control_type+"')");

2018-03-21 18:50:09

 string jsonp = context.Request.Params["jsoncallback"];

使用Nginx解决跨域问题

#user  nobody;

#开启进程数 <=CPU数 
worker_processes  1;

#错误日志保存位置
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#进程号保存文件
#pid        logs/nginx.pid;

#每个进程最大连接数（最大连接=连接数x进程数）每个worker允许同时产生多少个链接，默认1024
events {
    worker_connections  1024;
}


http {
    #文件扩展名与文件类型映射表
    include       mime.types;
    #默认文件类型
    default_type  application/octet-stream;

    #日志文件输出格式 这个位置相于全局设置
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    #请求日志保存位置
    #access_log  logs/access.log  main;
    
    #打开发送文件
    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    #连接超时时间
    keepalive_timeout  65;

    #打开gzip压缩
    #gzip  on;
    
    #设定请求缓冲
    #client_header_buffer_size 1k;
    #large_client_header_buffers 4 4k;
    
    #设定负载均衡的服务器列表
    #upstream myproject {
        #weigth参数表示权值，权值越高被分配到的几率越大
        #max_fails 当有#max_fails个请求失败，就表示后端的服务器不可用，默认为1，将其设置为0可以关闭检查
        #fail_timeout 在以后的#fail_timeout时间内nginx不会再把请求发往已检查出标记为不可用的服务器
    #}
    
    #webapp
    #upstream myapp {   
    # server 192.168.122.133:8080 weight=1 max_fails=2 fail_timeout=30s;   
    # server 192.168.122.134:8080 weight=1 max_fails=2 fail_timeout=30s;   
    #} 

    #配置虚拟主机，基于域名、ip和端口
    server {
        #监听端口
        listen       80;
        #监听域名
        server_name  localhost;

        #charset koi8-r;
        
        #nginx访问日志放在logs/host.access.log下，并且使用main格式（还可以自定义格式）
        #access_log  logs/host.access.log  main;

        #返回的相应文件地址
        location / {
            #设置客户端真实ip地址
            #proxy_set_header X-real-ip $remote_addr;

#websocket

#proxy_set_header Host $host:$server_port;
#proxy_set_header Upgrade $http_upgrade;
#proxy_set_header Connection "upgrade";

   
            #负载均衡反向代理
            #proxy_pass http://myapp;
            
            #返回根路径地址（相对路径:相对于/usr/local/nginx/）
            root   html;
            #默认访问文件
            index  index.html index.htm;
        }

        #配置反向代理tomcat服务器：拦截.jsp结尾的请求转向到tomcat
        #location ~ .jsp$ {
        #    proxy_pass http://192.168.122.133:8080;
        #}      
        
        #error_page  404              /404.html;
        # redirect server error pages to the static page /50x.html
        #
        
        #错误页面及其返回地址
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ .php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ .php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /.ht {
        #    deny  all;
        #}
    }
    
    #虚拟主机配置：
    server {
        listen 1234;
        server_name wolfcode.cn;
        location / {
        #正则表达式匹配uri方式：在/usr/local/nginx/wolfcode.cn下 建立一个test123.html 然后使用正则匹配
        #location ~ test {
            ## 重写语法：if return （条件 = ~ ~*）
            #if ($remote_addr = 192.168.122.1) {
            #       return 401;
            #}      
            
            #if ($http_user_agent ~* firefox) {
            #      rewrite ^.*$ /firefox.html;
            #      break;
            #}          
                        
            root wolfcode.cn;
            index index.html;
        }
        
        #location /goods {
        #       rewrite "goods-(d{1,5}).html" /goods-ctrl.html;
        #       root wolfcode.cn;
        #       index index.html;
        #}
        
        #配置访问日志
        access_log logs/wolfcode.cn.access.log main;
    }
    


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}