向本地服务器发送HTTP POST请求时遇到问题。这些是我得到的错误：
POST http://XXX.X.X.X:3306/login.php net::ERR_INVALID_HTTP_RESPONSE
HttpErrorResponse {headers: HttpHeaders, status: 0, statusText: "Unknown Error", url: null, ok: false, …}
message: "Http failure response for (unknown url): 0 Unknown Error
我认为这与URL有关。当我在本地浏览器上打开login.php文件时，似乎没有任何问题，因此使我觉得这可能是URL的端口不正确。
这是我发送POST请求的打字稿代码：
private getloginURL = "http://XXX.X.X.X:3306/login.php";
// methods
logIn(username: string, password: string) {
let sendData = new FormData();
sendData.append('username', username);
sendData.append('password', password);
this.http.post(this.getloginURL, sendData, {responseType: 'text'}).subscribe(data=> {
console.log(data);
this.currLoginStatus.next(data); // pushing data into behavior subject
});
如何找到本地服务器的正确URL？我正在使用Apache和mySQL。谢谢！
编辑：
对于端口80，这些是我得到的错误：
POST http://127.0.0.1/login.php 404 (Not Found)
Access to XMLHttpRequest at 'http://127.0.0.1/login.php' from origin 'http://localhost:4200' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
ERROR HttpErrorResponse {headers: HttpHeaders, status: 0, statusText: "Unknown Error", url: null, ok: false, …}
message: "Http failure response for (unknown url): 0 Unknown Error
对于端口443，与以前使用端口3306时出现的错误相同。