Arduino IDE for ESP8266教程（五）文件系统

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <FS.h>
ESP8266WebServer server ( 80 );
String ssid = "...."; // 需要连接的wifi热点名称
String password = "........"; // 需要连接的wifi热点密码
/**
 * 根据文件后缀获取html协议的返回内容类型
 */
String getContentType(String filename){
  if(server.hasArg("download")) return "application/octet-stream";
  else if(filename.endsWith(".htm")) return "text/html";
  else if(filename.endsWith(".html")) return "text/html";
  else if(filename.endsWith(".css")) return "text/css";
  else if(filename.endsWith(".js")) return "application/javascript";
  else if(filename.endsWith(".png")) return "image/png";
  else if(filename.endsWith(".gif")) return "image/gif";
  else if(filename.endsWith(".jpg")) return "image/jpeg";
  else if(filename.endsWith(".ico")) return "image/x-icon";
  else if(filename.endsWith(".xml")) return "text/xml";
  else if(filename.endsWith(".pdf")) return "application/x-pdf";
  else if(filename.endsWith(".zip")) return "application/x-zip";
  else if(filename.endsWith(".gz")) return "application/x-gzip";
  return "text/plain";
}
/* NotFound处理
 * 用于处理没有注册的请求地址
 * 一般是处理一些页面请求
 */
void handleNotFound() {
  String path = server.uri();
  Serial.print("load url:");
  Serial.println(path);
  String contentType = getContentType(path);
  String pathWithGz = path + ".gz";
  if(SPIFFS.exists(pathWithGz) || SPIFFS.exists(path)){
    if(SPIFFS.exists(pathWithGz))
      path += ".gz";
    File file = SPIFFS.open(path, "r");
    size_t sent = server.streamFile(file, contentType);
    file.close();
    return;
  }
  String message = "File Not Found\n\n";
  message += "URI: ";
  message += server.uri();
  message += "\nMethod: ";
  message += ( server.method() == HTTP_GET ) ? "GET" : "POST";
  message += "\nArguments: ";
  message += server.args();
  message += "\n";
  for ( uint8_t i = 0; i < server.args(); i++ ) {
    message += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n";
  }
  server.send ( 404, "text/plain", message );
}
void handleMain() {
  /* 返回信息给浏览器（状态码，Content-type， 内容）
   * 这里是访问当前设备ip直接返回一个String
   */
  Serial.print("handleMain");
  File file = SPIFFS.open("/index.html", "r");
  size_t sent = server.streamFile(file, "text/html");
  file.close();
  return;
}
/* 引脚更改处理
 * 访问地址为htp://192.162.xxx.xxx/pin?a=XXX的时候根据a的值来进行对应的处理
 */
void handlePin() {
  if(server.hasArg("a")) { // 请求中是否包含有a的参数
    String action = server.arg("a"); // 获得a参数的值
    if(action == "on") { // a=on
      digitalWrite(2, LOW); // 点亮8266上的蓝色led，led是低电平驱动，需要拉低才能亮
      server.send ( 200, "text/html", "Pin 2 has turn on"); return; // 返回数据
    } else if(action == "off") { // a=off
      digitalWrite(2, HIGH); // 熄灭板载led
      server.send ( 200, "text/html", "Pin 2 has turn off"); return;
    }
    server.send ( 200, "text/html", "unknown action"); return;
  }
  server.send ( 200, "text/html", "action no found");
}
void setup() { 
  // 日常初始化网络
  pinMode(2, OUTPUT);
  Serial.begin ( 115200 );
  SPIFFS.begin();
  int connectCount = 0;
  WiFi.begin ( ssid.c_str(), password.c_str() );
  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 1000 );
    Serial.print ( "." );
    if(connectCount > 30) {
      Serial.println( "Connect fail!" );
      break;
    }
    connectCount += 1;
  }
  if(WiFi.status() == WL_CONNECTED) {
    Serial.println ( "" );
    Serial.print ( "Connected to " );
    Serial.println ( ssid );
    Serial.print ( "IP address: " );
    Serial.println ( WiFi.localIP() );
    connectCount = 0;
  }
  server.on ("/", handleMain); // 绑定‘/’地址到handleMain方法处理
  server.on ("/pin", HTTP_GET, handlePin); // 绑定‘/pin’地址到handlePin方法处理
  server.onNotFound ( handleNotFound ); // NotFound处理
  server.begin();
  Serial.println ( "HTTP server started" );
}
 
void loop() {
  /* 循环处理，因为ESP8266的自带的中断已经被系统占用，
   * 只能用过循环的方式来处理网络请求
   */
  server.handleClient();
}