运用CORS实现POST方式跨域请求数据
CORS全名Cross-Origin Resource Sharing,顾名思义:跨域分享资源,这是W3C制定的跨站资源分享标准。 目前包括IE10+、chrome、safari、FF都提供了XMLHttpRequest对象对该标准的支持,在更老的IE8中则提供了xDomainRequest对象,部分实现了该标准; 下面是创建request对象的代码: var url = "http://www.Cuoxin.com/1.php"; if (XMLHttpRequest) { var req = new XMLHttpRequest(); // 利用withCredentials属性来判断是否支持跨域请求 if (!("withCredentials" in req)) { // w3c先行 if (window.XDomainRequest) { req = new XDomainRequest(); } } req.open('POST', url, true); req.onload = function (data) { alert(this.responseText); }; req.send(); } 注意xDomainRequest对象只支持http和https协议 在利用XMLHttpRequest对象发POST请求前会发一个options嗅探来确定是否有跨域请求的权限;同时在header头上带上Origin信息来指示来源网站信息,服务器响应时需要带上Access-Control-Allow-Origin头的值是否和Origin信息相匹配。 header("Access-Control-Allow-Origin: http://localhost"); // *为全部域名 CORS的缺点是你必须能控制服务器端的权限,允许你跨域访问 设置CORS实现跨域请求 一、使用php代码实现 # # CORS config for php # Code by anrip[mail@anrip.com] # function make_cors($origin = '*') { $request_method = $_SERVER['REQUEST_METHOD']; if ($request_method === 'OPTIONS') { header('Access-Control-Allow-Origin:'.$origin); header('Access-Control-Allow-Credentials:true'); header('Access-Control-Allow-Methods:GET, POST, OPTIONS'); header('Access-Control-Max-Age:1728000'); header('Content-Type:text/plain charset=UTF-8'); header('Content-Length: 0',true); header('status: 204'); header('HTTP/1.0 204 No Content'); } if ($request_method === 'POST') { header('Access-Control-Allow-Origin:'.$origin); header('Access-Control-Allow-Credentials:true'); header('Access-Control-Allow-Methods:GET, POST, OPTIONS'); } if ($request_method === 'GET') { header('Access-Control-Allow-Origin:'.$origin); header('Access-Control-Allow-Credentials:true'); header('Access-Control-Allow-Methods:GET, POST, OPTIONS'); } } 二、使用nginx配置实现 # CORS config for nginx # Code by anrip[mail@anrip.com] # location / { if ($request_method = 'OPTIONS') { add_header 'Access-Control-Allow-Origin' $origin; # # Om nom nom cookies # add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; # # Custom headers and headers various browsers *should* be OK with but aren't # add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; # # Tell client that this pre-flight info is valid for 20 days # add_header 'Access-Control-Max-Age' 1728000; add_header 'Content-Type' 'text/plain charset=UTF-8'; add_header 'Content-Length' 0; return 204; } if ($request_method = 'POST') { add_header 'Access-Control-Allow-Origin' $origin; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; } if ($request_method = 'GET') { add_header 'Access-Control-Allow-Origin' $origin; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; } } (编辑:银川站长网) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |