我想从我的网站获取 json。我正在尝试发送 POST 请求以进行身份验证，之后我想发送 GET 请求以获取 json，但我不能这样做，因为它给了我错误 401 未经授权（cookie 未保存）。我如何与 Arduino、ethernet shield 和 WebClien 保持会话？
资源：
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
//Change to your server domain
char serverName[] = "bh.quickle.me";
// change to your server's port
int serverPort = 80;
// change to the page on that server
char pageName[] = "/users/sign_in";
char sensorPage[] = "/api/v1/sensors";
EthernetClient client;
int totalCount = 0;
// insure params is big enough to hold your variables
char params[68];
// set this to the number of milliseconds delay
// this is 30 seconds
#define delayMillis 30000UL
unsigned long thisMillis = 0;
unsigned long lastMillis = 0;
void setup() {
Serial.begin(9600);
// disable SD SPI
pinMode(4,OUTPUT);
digitalWrite(4,HIGH);
pinMode(7,OUTPUT);
digitalWrite(7,HIGH);
Serial.print(F("Starting ethernet..."));
if(!Ethernet.begin(mac)) Serial.println(F("failed"));
else Serial.println(Ethernet.localIP());
delay(2000);
Serial.println(F("Ready"));
sprintf(params,"{\"user\": {\"email\": \"EgorkZe@gmail.com\",\"password\": \"1234asdf\"}}");
postPage(serverName,serverPort,pageName,params);
}
void loop()
{
thisMillis = millis();
if(thisMillis - lastMillis > delayMillis)
{
lastMillis = thisMillis;
getPage(serverName, serverPort, sensorPage);
}
}
byte postPage(char* domainBuffer,int thisPort,char* page,char* thisData)
{
int inChar;
char outBuf[64];
Serial.print(F("connecting..."));
if(client.connect(domainBuffer,thisPort))
{
Serial.println(F("connected"));
// send the header
sprintf(outBuf,"POST %s HTTP/1.1",page);
client.println(outBuf);
sprintf(outBuf,"Host: %s",domainBuffer);
client.println(outBuf);
client.println(F("Connection: close\r\nContent-Type: application/json"));
sprintf(outBuf,"Content-Length: %u\r\n",strlen(thisData));
client.println(outBuf);
// send the body (variables)
client.print(thisData);
}
else
{
Serial.println(F("failed"));
return 0;
}
int connectLoop = 0;
while(client.connected())
{
while(client.available())
{
inChar = client.read();
Serial.write(inChar);
connectLoop = 0;
}
delay(1);
connectLoop++;
if(connectLoop > 10000)
{
Serial.println();
Serial.println(F("Timeout"));
client.stop();
}
}
Serial.println();
Serial.println(F("disconnecting."));
client.stop();
return 1;
}
byte getPage(char* domainBuffer, int thisPort, char* page)
{
int inChar;
char outBuf[128];
Serial.print(F("connecting..."));
if(client.connect(domainBuffer,thisPort))
{
Serial.println(F("connected"));
sprintf(outBuf,"GET %s HTTP/1.1",page);
client.println(outBuf);
sprintf(outBuf,"Host: %s",serverName);
client.println(outBuf);
client.println(F("Connection: close\r\n"));
}
else
{
Serial.println(F("failed"));
return 0;
}
// connectLoop controls the hardware fail timeout
int connectLoop = 0;
while(client.connected())
{
while(client.available())
{
inChar = client.read();
Serial.write(inChar);
// set connectLoop to zero if a packet arrives
connectLoop = 0;
}
connectLoop++;
// if more than 10000 milliseconds since the last packet
if(connectLoop > 10000)
{
// then close the connection from this end.
Serial.println();
Serial.println(F("Timeout"));
client.stop();
}
// this is a delay for the connectLoop timing
delay(1);
}
Serial.println();
Serial.println(F("disconnecting."));
// close client end
client.stop();
return 1;
}