[研究][ASP.NET]用HttpClient取得回傳網頁Header內容
2023-04-03
環境：Visual Studio 2022 + ASP.NET + WebForm + Web Application + C#
********************************************************************************
Default.aspx
<%@ Page Async="true" Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1.Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:Label ID="Label1" runat="server"></asp:Label>
</form>
</body>
</html>
|
Default.aspx.cs
using System;
using System.Net.Http;
namespace WebApplication1
{
public partial class Default : System.Web.UI.Page
{
protected async void Page_Load(object sender, EventArgs e)
{
using (var httpClient = new HttpClient())
{
var request = new HttpRequestMessage(HttpMethod.Head, "https://www.example.com");
HttpResponseMessage response = await httpClient.SendAsync(request);
//string serverHeader = response.Headers.Server.ToString();
foreach (var header in response.Headers)
{
Label1.Text = Label1.Text + "<br />" + header.Key + ": ";
foreach (var headvalue in header.Value)
{
//Console.WriteLine("{0}: {1}", header.Key, string.Join(",", header.Value));
Label1.Text = Label1.Text + headvalue + ";";
}
}
}
}
}
}
|
結果
Age: 567867;
X-Cache: HIT;
Accept-Ranges: bytes;
Cache-Control: max-age=604800;
Date: Mon, 03 Apr 2023 07:25:55 GMT;
ETag: "3147526947";
Server: ECS;(oxr/8310);
****************************************
https://www.hinet.net/ 測試結果
Connection: keep-alive;
x-request-id: 3c28f1466a8f21f7b277e6e1ada22fd5;
X-Cache: RULE;
Date: Mon, 03 Apr 2023 07:28:48 GMT;
Server: HiNetCDN/2211;
(完)
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