connected()

描述

判断 Client 物件是否连线中。如果用户端与伺服端的连线已经中断了，但是 Client 物件中仍然有从伺服端传送的资料而未被读取的话，该 Client 物件仍被视为连线中。

语法


client.connected()


参数

无参数

回传

boolean：如果该 Client 物件连线中则回传 true，反之回传 false

Example

#include <Ethernet.h>

byte mac[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
byte ip[] = { 10, 0, 0, 177 };
byte server[] = { 64, 233, 187, 99 }; // Google

EthernetClient client;

void setup()
{
  Ethernet.begin(mac, ip);
  Serial.begin(9600);
  client.connect(server, 80);
  delay(1000);

  Serial.println("connecting...");

  if (client.connected()) {
    Serial.println("connected");
    client.println("GET /search?q=arduino HTTP/1.0");
    client.println();
  } else {
    Serial.println("connection failed");
  }
}

void loop()
{
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }

  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();
    for(;;)
      ;
  }
}

函式库参考主页面

The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.