Question

我对HTTP的函数GET函数有一点问题。程序读取ID号，输入（新行）后，它应该从REST API获取数据。问题是我必须按两次输入API来获取数据。这是代码

#include <SPI.h>
#include <Ethernet.h>

byte mac[] = { 0x90, 0x02, 0xBA, 0xEF, 0xCA, 0x33 };
char server[] = "xxx.xx"; 

EthernetClient client;
char tmp;
char buffer[30];
int bufferCounter = 0;

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }



if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
  }
  delay(1000);
  Serial.println("Ready");

}

void getData(char* num ){
Serial.println("connecting...");
if (client.connect(server, 80)) {
    Serial.println("connected");
    client.print("GET /api/id/");
    client.print(num);
    client.println("/?format=json HTTP/1.1");
    client.println("Host: xxx.xx");
    client.println("Authorization: Token xxxxxxxxxxxxxxxxxxxxx");
    client.println("Connection: close");
    client.println();
  } else {
    // if you didn't get a connection to the server:
    Serial.println("connection failed");
  }

    while (client.available()) {
    char c = client.read();
    Serial.print(c);
  }

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


void loop() {
    if (Serial.available() > 0) {
       tmp = Serial.read();
       if(tmp == '\n'){
        buffer[bufferCounter] = 0;
        bufferCounter = 0;
        Serial.println(buffer);
        getData(buffer);
       }
       else{
        buffer[bufferCounter] = tmp;
        bufferCounter++;
       }
  }

}

在串行链接上，我收到此消息。起初

Ready

当我在那里写35并按回车时我得到了这个

35
connecting...
connected

然后我必须再次按回车键，最后我得到正确的数据，但连接失败，我不知道为什么

connecting...
connection failed
HTTP/1.1 404 NOT FOUND
Date: Tue, 22 Nov 2016 16:18:18 GMT
Content-Type: application/json
Transfer-Encoding: chunked
Connection: close
Allow: GET, PUT, PATCH, DELETE, HEAD, OPTIONS
Vary: Accept, Cookie

18
{"detail":"not found."}
0


disconnecting.

有人可以帮我，问题出在哪里？谢谢。

Arduino以太网盾不发送数据 - REST API

0 个答案: