CORS-Express

CORS-Express.md

CORS-Express

https://www.w3.org/wiki/CORS

https://enable-cors.org/server_expressjs.html

https://github.com/monsur/enable-cors.org

app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

app.get('/', function(req, res, next) {
  // Handle the get for this route
});

app.post('/', function(req, res, next) {
 // Handle the post for this route
});

https://stackoverflow.com/questions/11181546/how-to-enable-cross-origin-resource-sharing-cors-in-the-express-js-framework-o

var express = require('express')
  , app = express.createServer();

app.get('/', function (req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "X-Requested-With");
    next();
});

app.configure(function () {
    app.use(express.methodOverride());
    app.use(express.bodyParser());
    app.use(app.router);
});

app.configure('development', function () {

    app.use(express.static(__dirname + '/public'));
    app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});

app.configure('production', function () {


    var oneYear = 31557600000;
    //    app.use(express.static(__dirname + '/public', { maxAge: oneYear }));
    app.use(express.static(__dirname + '/public'));
    app.use(express.errorHandler());
});

app.listen(8888);
console.log('express running at http://localhost:%d', 8888);

https://stackoverflow.com/questions/5916900/how-can-you-detect-the-version-of-a-browser

https://stackoverflow.com/questions/23952045/wikipedia-api-cross-origin-requests

https://gist.github.com/xgqfrms-GitHub/a3fcffb6d7923e2a7471041053f00162

"Access-Control-Allow-Origin", "*"

"Access-Control-Allow-Origin": "*",

ok

fetch('https://cdn.xgqfrms.xyz/json/cats.json', {
    method: 'get'
}).then(function(response) {
    return response.json()
}).then(function(json) {
    console.log('parsed json: ', json)
}).catch(function(error) {
    console.log('parsing failed: ', error)
});

error

fetch('https://cdn.xgqfrms.xyz/json/cats.json', {
    method: 'get',
    headers: {
        'Accept': 'application/json',
        "Access-Control-Allow-Origin": "*",
        'Content-Type': 'application/json'
    }
}).then(function(response) {
    return response.json()
}).then(function(json) {
    console.log('parsed json: ', json)
}).catch(function(error) {
    console.log('parsing failed: ', error)
});

Promise {[[PromiseStatus]]: "pending", [[PromiseValue]]: undefined}
VM130:1 OPTIONS https://cdn.xgqfrms.xyz/json/cats.json 405 ()

index.html#/blog?_k=9bbmwk:1 Fetch API cannot load https://cdn.xgqfrms.xyz/json/cats.json.
Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
Origin 'null' is therefore not allowed access.
The response had HTTP status code 405.
If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

对预检要求的响应不通过访问控制检查：请求资源上不存在“Access-Control-Allow-Origin”头。
Origin'null'因此不被允许访问。
该响应具有HTTP状态代码405。
如果一个不透明的响应满足您的需要，请将该请求的模式设置为“no-cors”，以禁用CORS来获取资源。

ok

fetch('https://newsapi.org/v1/articles?source=the-next-web&sortBy=latest&apiKey=0987b00e542141369049e647701b65d9', {
    method: 'get'
}).then(function(response) {
    return response.json()
}).then(function(json) {
    console.log('parsed json: ', json)
}).catch(function(error) {
    console.log('parsing failed: ', error)
});

error

fetch('https://newsapi.org/v1/articles?source=the-next-web&sortBy=latest', {
    method: 'get',
    headers: {
        'Accept': 'application/json',
        "Access-Control-Allow-Origin": "*",
        'Content-Type': 'application/json',
        'X-Api-Key': `0987b00e542141369049e647701b65d9`
    }
}).then(function(response) {
    return response.json()
}).then(function(json) {
    console.log('parsed json: ', json)
}).catch(function(error) {
    console.log('parsing failed: ', error)
});

get API

https://cdn.xgqfrms.xyz/

OK

https://gist.github.com/

Error

chrome://chrome-urls/

https://www.cnblogs.com/laden666666/p/5544572.html

chrome://flags/

"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --disable-web-security --user-data-dir=D:\Chrome

"C:\Program Files (x86)\Google\Chrome\Application"