如何在扩展中解决访问控制允许源

Question

我的请求由于同源策略而失败，但是无论如何我可以使用 webRequest api 在扩展中解决此问题以修改标头吗？

Answer 1

将此添加到您的背景.js文件中：

/**
 * Force Access-Control-Allow-Origin
 *
 * Ideally, we'll want to remove this for production,
 * and actually set the header server side instead.
 */
chrome.webRequest.onHeadersReceived.addListener(function onHeadersReceived(resp) {
  var len = resp.responseHeaders.length;
  while(--len) {
    if(resp.responseHeaders[len].name.toLowerCase() === "access-control-allow-origin") {
      resp.responseHeaders[len].value = "*";
      break;
    }
  }
  if (len === 0) { //if we didn't find it len will be zero
    resp.responseHeaders.push({
      'name': 'Access-Control-Allow-Origin',
      'value': '*'
    });
  }
  return {responseHeaders: resp.responseHeaders};
}, {
  urls: ['*://*.YOU-API-DOMAIN.com/*', '*://localhost/*'],
  /*TYPES: "main_frame", "sub_frame", "stylesheet", "script",
           "image", "object", "xmlhttprequest", "other" */
  types: ['xmlhttprequest']
}, ['blocking', 'responseHeaders']);

并将这些添加到您的 manifest.json 权限中：

"webRequest",
"webRequestBlocking"

重新加载扩展，你应该很高兴！