如何解决向特定Web服务器发出HTTP请求的Flutter Web HTTP错误 [英] how to fix flutter web http error making http request to a particular web server

问题描述

我试图在下面的Flutter Web应用程序中向000webhost发出HTTP请求.第一种方法与第二种方法相同，只是更改了URL.但是，第一个有效，但是第二个无效.有人建议添加更多标题，但我不知道要添加哪些标题.

I am trying to make an HTTP request to 000webhost as below in my flutter web app. The first method is the same as the second, I only changed the URL. However, the first one works but the second does not work. Someone suggested adding more headers but I have no idea which headers to add.

// This method WORKS
getMethod()async{

  print("IN GET ....");
  String theUrl = 'https://jsonplaceholder.typicode.com/todos';
  var res = await http.Client().get(Uri.encodeFull(theUrl),headers: {"Accept":"application/json"});
  //var res = await http.get(Uri.encodeFull(theUrl),headers: {"Accept":"application/json"});
  var responsBody = json.decode(res.body);
  print(responsBody);
  return responsBody;
}



// This DOES NOT WORK
getMethod()async{
  print("IN GET ....");
  String theUrl = 'https://funholidayshotels.000webhostapp.com/fetchData.php';
  var res = await http.Client().get(Uri.encodeFull(theUrl),headers: {"Accept":"application/json"});
  //var res = await http.get(Uri.encodeFull(theUrl),headers: {"Accept":"application/json"});
  var responsBody = json.decode(res.body);
  print(responsBody);
  return responsBody; 
}

推荐答案

经过一段时间的努力，我发现问题出在服务器端我必须在000webhost上的 .htaccess 上添加 Header并添加Access-Control-Allow-Origin"*" ，这为我解决了

After struggling with this for some time I figured out the problem was from the server side I had to add Header add Access-Control-Allow-Origin "*" to .htaccess on 000webhost And This solves it for me

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