自动从网页打开网址

Question

我已经创建了一个使用arduino控制led的网页。如果满足某些条件，我希望网页在同一个标​​签中自动打开一个网址。我想要上述问题的代码。谢谢

Answer 1

下面描述了3种可能的方式：

发送HTTP响应：

您可以使用HTTP响应将用户重定向到不同的页面，例如：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;
using System.Threading;
using System.Speech.Synthesis;

namespace CpuandMemoryMonitor
{
class Program
{
    /// <summary>
    /// Entry Point into the Program | Program: CPU & Memory Monitor |By:  
    Andrew.
    /// </summary>
    /// 

    static void Main(string[] args)
    {
        #region My performance Counters
        // This will greet the user in the default voice
        SpeechSynthesizer synth = new SpeechSynthesizer();
        synth.Speak("Welcome to the CPU and Memory Monitor");

        // This will pull the current CPU load in percentage.
        PerformanceCounter perfCpuCount = new PerformanceCounter("Processor Information", "% Processor Time", "_Total");

        // This will pull the current available Memory in Megabytes
        PerformanceCounter perfMemCount = new PerformanceCounter("Memory", "Available MBytes");

        // This will give us system uptime (in Seconds)
        PerformanceCounter perfUptimecount = new PerformanceCounter("System", "System Up Time");

        #endregion

        #region Perfromance Counters Program Loop

        //Infinite While Loop.
        while (true)
        {
            // Get the current perforance counter values
            int currentcpupercentage = (int)perfCpuCount.NextValue();
            int currentavailablememory = (int)perfMemCount.NextValue();

            //Print the performance counter values to the console screen
            Console.WriteLine("CPU Load: {0}%", currentcpupercentage);
            Console.WriteLine("Available Memory: {0}MB", currentavailablememory);

            // Speech synthasiser warns user when CPU Load is above 80 percent
            if (currentcpupercentage > 80)
            {
                ///If CPU Load is at 100 % Warn the user in a a female voice!
                if (currentcpupercentage == 100)
                {
                    synth.SelectVoiceByHints(VoiceGender.Female);
                    string cpuLoadVocalMessage = String.Format("Oh dear! You're CPU is about to catch on Fire!");
                    synth.Speak(cpuLoadVocalMessage);
                }

                else 

                //If CPU Load is at 80 % Warn the user in a a male voice!
                {
                    synth.SelectVoiceByHints(VoiceGender.Male);
                    string cpuLoadVocalMessage = String.Format("The Current Cpu Load is {0}", currentcpupercentage);
                    synth.Speak(cpuLoadVocalMessage);
                }

                // Speech synthasiser warns user when memory is less then 1 gigabyte
                if (currentavailablememory < 1024)

                {
                    // If CPU Load is at 100 % Warn the user ina a female voice!

                    string memavailableVocalMessage = string.Format("You currently have {0} gigabytes of memory available", currentavailablememory / 1024);
                    synth.Speak(memavailableVocalMessage);
                }


                //Sleep for 1 second
                Thread.Sleep(1000);

            }

            #endregion
        }
    }
}

我会选择这个，因为它需要从Arduino发送最少量的字节

发送HTML代码：

当满足arduino的条件时，您可以在HTML中输出以下代码：

HTTP/1.1 302 Found
Location: http://google.com

它会将您重定向到Google。

发送Javascript代码：

如果您想重新定向，请使用Javascript执行此操作：

<meta http-equiv="Refresh" content="URL=http://google.com" />