标签：rip ipa type lang res not over ecif else
app.all(‘*‘, function (req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "X-Requested-With");
res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
res.header("X-Powered-By", ‘ 3.2.1‘);
res.header("Content-Type", "application/json;charset=utf-8");
next();
});
if (req.method === ‘OPTIONS‘) {
console.log(‘!OPTIONS‘);
var headers = {};
// IE8 does not allow domains to be specified, just the *
// headers["Access-Control-Allow-Origin"] = req.headers.origin;
headers["Access-Control-Allow-Origin"] = "*";
headers["Access-Control-Allow-Methods"] = "POST, GET, PUT, DELETE, OPTIONS";
headers["Access-Control-Allow-Credentials"] = false;
headers["Access-Control-Max-Age"] = ‘86400‘; // 24 hours
headers["Access-Control-Allow-Headers"] = "X-Requested-With, X-HTTP-Method-Override, Content-Type, Accept";
res.writeHead(200, headers);
res.end();
} else {
//...other requests
}
“简单请求”
请求方法是以下三种方法之一：
HEAD
GET
POST
“非简单请求”
HTTP的头信息不超出以下几种字段：
Accept
Accept-Language
Content-Language
Last-Event-ID
Content-Type：
application/x-www-form-urlencoded、 multipart/form-data、text/plain
不满足这些特征的请求称为“非简单请求”，例如：content-type=applicaiton/json , method = PUT/DELETE...
标签：rip ipa type lang res not over ecif else
原文地址：https://www.cnblogs.com/tongbiao/p/9893249.html
