如何正确地从维基百科 API 获取 CORS？

Question

Chrome 允许此 CORS 提取，但 FireFox 阻止它。

fetch(
  "https://en.wikipedia.org/w/api.php?action=query&titles=San_Francisco&prop=images&imlimit=20&origin=*&format=json&formatversion=2",
  {
    method: "GET",
    headers: {
      "User-Agent": "someone"
    }
  }
)
  .then(response => response.json())
  .then(json => {
    console.log(json);
  })
  .catch(error => {
    console.log(error.message);
  });

Firefox (61.0.1 Mac) 控制台错误：

Cross-Origin Request Blocked:
The Same Origin Policy disallows reading the remote resource at
https://en.wikipedia.org/w/api.php?action=query&titles=San_Francisco&prop=images&imlimit=20&origin=*&format=json&formatversion=2.
(Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

与 GitHub API 类似的抓取功能适用于 Firefox。

fetch(
  "https://api.github.com",
  {
    method: "GET",
    headers: {
      "User-Agent": "someone"
    }
  }
)
  .then(response => response.json())
  .then(json => {
    console.log(json);
  })
  .catch(error => {
    console.log(error.message);
  });

Answer 1

如最初所述here, since wikimedia website checks the origin using the query parameter origin and does not support cors-preflight-request，您必须确保已发送 GET 方法。

删除示例中的以下内容可确保发送 GET 请求：

headers: {
  "User-Agent": "someone"
}

这里是更新的例子：

fetch(
  "https://en.wikipedia.org/w/api.php?action=query&titles=San_Francisco&prop=images&imlimit=20&origin=*&format=json&formatversion=2",
  {
    method: "GET"
  }
)
  .then(response => response.json())
  .then(json => {
    console.log(json);
  })
  .catch(error => {
    console.log(error.message);
  });

如何正确地从维基百科 API 获取 CORS？

How to properly CORS fetch from the Wikipedia API?

wikipedia-api

cors