javascript - 无法访问维基数据 API

Question

我正在尝试使用维基数据 API，但我得到的只是:

Fetch API cannot load https://www.wikidata.org/w/api.php?action=wbsearchentities&search=Ingmar%20Bergman&language=en&limit=20&format=json&origin=http%3A%2F%2Fwww.dev.example.com%3A3000. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://www.dev.example.com:3000' is therefore not allowed access. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

这是代码:

const headers = new Headers();

const origin = "http://www.dev.example.com:3000";
headers.append("Origin", origin);
headers.append("Content-Type", "application/json; charset=UTF-8");

const url = "https://www.wikidata.org/w/api.php";

const query = {
    action: "wbsearchentities",
    search: "Ingmar Bergman",
    language: "en",
    limit: 20,
    format: "json",
    origin
};

const myInit = new Request(url + "?" + qs.stringify(query), {
    method: "GET",
    mode: "cors-with-forced-preflight",
    headers
});

fetch(myInit)
    .then(function(res) {
        console.log(res);
    })
    .catch(function(err){
        console.log(err);
    });

我也尝试过 JSONP，但没有成功。在浏览器中运行链接(只是没有 origin 参数)会给出正确的响应。

Answer 1

那么为什么要添加“origin”参数呢？将其关闭，或添加“&callback=some_function”以获得 JSONP。