ESP8266 WiFi WebServer

#include 
 
/*** 该工程可以在2.4.0版本esp8266库中运行，没在更高版本库中进行测试 ***/
 
const char *ssid = "WIFI名称";
const char *password = "WIFI密码";
 
WiFiServer server(80);
 
String readString = ""; //建立一个字符串对象用来接收存放来自客户的数据
 
//响应头
String responseHeaders =
    String("") +
    "HTTP/1.1 200 OK\r\n" +
    "Content-Type: text/html\r\n" +
    "Connection: close\r\n" +
    "\r\n";
 
//网页
String myhtmlPage =
    String("") +
    "" +
    "" +
    "    " +   
    "    " +
    "" +
    "" +
    "    
Unkwon
" +
    "    " +
    "" +
    "";
 
bool isLedTurnOpen = false; // 记录LED状态
 
void setup()
{
    pinMode(LED_BUILTIN, OUTPUT);
    digitalWrite(LED_BUILTIN, HIGH); // 熄灭LED
 
    Serial.begin(115200);
    Serial.println();
 
    Serial.printf("Connecting to %s ", ssid);
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED)
    {
        delay(500);
        Serial.print(".");
    }
    Serial.println(" connected");
 
    server.begin();
    Serial.printf("Web server started, open %s in a web browser\n", WiFi.localIP().toString().c_str());
}
 
void loop()
{
    WiFiClient client = server.available(); //尝试建立客户对象
    if (client)                             //如果当前有客户可用
    {
        boolean currentLineIsBlank = true;
        Serial.println("[Client connected]");
 
        while (client.connected()) //如果客户端建立连接
        {
            if (client.available()) //等待有可读数据
            {
                char c = client.read(); //读取一字节数据
                readString += c;        //拼接数据
                /************************************************/
                if (c == '\n' && currentLineIsBlank) //等待请求头接收完成(接收到空行)
                {
                    //比较接收到的请求数据
                    if (readString.startsWith("GET / HTTP/1.1")) //如果是网页请求
                    {
                        client.print(responseHeaders); //向客户端输出网页响应
                        client.print(myhtmlPage);      //向客户端输出网页内容
                        client.print("\r\n");
                    }
                    else if (readString.startsWith("GET /Switch")) //如果是改变LED状态请求
                    {
                        if (isLedTurnOpen == false)
                        {
                            digitalWrite(LED_BUILTIN, LOW); // 点亮LED
                            client.print("LED has been turn on");
                            isLedTurnOpen = true;
                        }
                        else
                        {
                            digitalWrite(LED_BUILTIN, HIGH); // 熄灭LED
                            client.print("LED has been turn off");
                            isLedTurnOpen = false;
                        }
                    }
                    else
                    {
                        client.print("\r\n");
                    }
                    break;
                }
 
                if (c == '\n')
                {
                    currentLineIsBlank = true; //开始新行
                }
                else if (c != '\r')
                {
                    currentLineIsBlank = false; //正在接收某行中
                }
                /************************************************/
            }
        }
        delay(1);      //等待客户完成接收
        client.stop(); //结束当前连接:
        Serial.println("[Client disconnected]");
 
        Serial.println(readString); //打印输出来自客户的数据
        readString = "";
    }
}