我正在构建一个连接到 AWS IOT 平台的硬件设备。根据文档,aws iot 平台的身份验证是使用 TLS 完成的。我在授权访问的设备上有根 CA、客户端密钥和客户端证书文件。有没有办法在发出 POST 请求时在 HTTP 标头中使用这些文件?如果是这样,怎么做?到目前为止,这里是 Energia IDE(基于 Arduino IDE)和使用 WiFiClient 方法的代码。
if (client.sslConnect(aws_endpoint, 443))
{
Serial.println("\nConnected to AWS endpoint");
String PostData = "{\"value1\" : \"testValue\", \"value2\" : \"Hello\", \"value3\" : \"World!\" }";
request = "POST /things/";
request += thingname;
request += "/shadow";
request += " HTTP/1.1";
Serial.print("Request:\t"); Serial.println(request);
Serial.print("Post data:\t"); Serial.println(PostData);
client.println(request);
client.println("Host: ");
client.println(aws_endpoint);
client.println(":443");
client.println("User-Agent: Energia/1.1");
client.println("Connection: close");
client.println("Content-Type: application/json");
client.print("Content-Length: "); client.println(PostData.length());
client.println();
client.println(PostData);
client.println();
}
else
{
Serial.println("Connection failed");
}
Serial.println();
Serial.println("Server response:");
Serial.println();
// Capture response from the server. (10 second timeout)
long timeOut = 5000;
long lastTime = millis();
while((millis()-lastTime) < timeOut)
{ // Wait for incoming response from server
while (client.available())
{ // Characters incoming from the server
char c = client.read(); // Read characters
Serial.write(c);
}
}
但是,这会产生身份验证错误:
HTTP/1.1 403 Forbidden
content-type: application/json
content-length: 91
date: Tue, 26 Jul 2016 11:46:59 GMT
x-amzn-RequestId: 4d5388a9-e3c4-460a-b674-c3f971f3330d
connection: Keep-Alive
x-amzn-ErrorType: ForbiddenException:
{"message":"Missing Authentication Token","traceId":"4d5388a9-e3c4-460a-b674-c3f971f3330d"}