如何处理腹部颤动的胸衣

Question

我一直在努力解决flutter的PWA项目中的cors问题，我正在遵循这个

如何在执行POST请求时解决flutter CERTIFICATE_VERIFY_FAILED错误？。

我正在使用universal_io包，因为dart.io不能用于web。。。这是代码的一部分

HttpClient client = new HttpClient();
client.badCertificateCallback =
((X509Certificate cert, String host, int port) => true);
String url = 'https:xxxx.php';
Map map = {
"a": "a",
"b": "b"
};
HttpClientRequest request = await client.postUrl(Uri.parse(url));
request.headers.set('content-type', 'application/json');
request.add(utf8.encode(json.encode(map)));
if (request is BrowserHttpClientRequest) {
request.credentialsMode = BrowserHttpClientCredentialsMode.include;
}
HttpClientResponse response = await request.close();
print(response.toString());
String reply = await response.transform(utf8.decoder).join();
print(reply);

但我得到了这样的错误

--------------------------------------------------------------------------------
BrowserHttpClient received an error from XMLHttpRequest (which doesn't tell
reason for the error).
HTTP method:        POST
URL:                https://www.rscm.co.id/apirscm/v2.php
Origin:             http://localhost:64121
Cross-origin request!
XmlHttpRequest 'credentials mode' is enabled.
Did the server send the following mandatory headers?
* Access-Control-Allow-Credentials: true
* Access-Control-Allow-Origin: http://localhost:64121
* In credentials mode, '*' would fail!
* Access-Control-Allow-Methods: POST

有办法解决这个问题吗？

Answer 1

您可以在chrome的调试模式下使用本地主机服务器，方法如下：在终端打开这个。

open -n -a /Applications/Google Chrome.app/Contents/MacOS/Google Chrome --args --user-data-dir="/Users/i0868/Desktop/Chrome" --disable-web-security

Answer 2

您可以执行类似的操作来启用凭据模式：

final httpClientRequest = MyHttpClientRequest;
if (httpClientRequest is BrowserHttpClientRequest) {
httpClientRequest.credentialsMode = BrowserHttpClientCredentialsMode.include;
}

但更喜欢使用这个库universal.io而不是dart.io