Question

我正在尝试从Arduino向Google App Engine发出get请求：

client.println("GET /getData HTTP/1.0\r\n");
client.println("HOST: xxxxxxxxxx.appspot.com\r\n");
client.println("\r\n");

我收到以下错误消息：

HTTP/1.0 404 Not Found
Content-Type: text/html; charset=UTF-8
Content-Length: 1576
Date: Tue, 24 May 2016 12:07:34 GMT

<!DOCTYPE html>
<html lang=en>
  <meta charset=utf-8>
  <meta name=viewport content="initial-scale=1, minimum-scale=1, width=device-width">
  <title>Error 404 (Not Found)!!1</title>
  <style>
    *{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* > body{background:url(//www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}#logo{background:url(//www.google.com/images/branding/googlelogo/1x/googlelogo_color_150x54dp.png) no-repeat;margin-left:-5px}@media only screen and (min-resolution:192dpi){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat 0% 0%/100% 100%;-moz-border-image:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) 0}}@media only screen and (-webkit-min-device-pixel-ratio:2){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat;-webkit-background-size:100% 100%}}#logo{display:inline-block;height:54px;width:150px}
  </style>
  <a href=//www.google.com/><span id=logo aria-label=Google></span></a>
  <p><b>404.</b> <ins>Thatâ€™s an error.</ins>
  <p>The requested URL <code>/getData </code> was not found on this server.  <ins>Thatâ€™s all we know.</ins>

我似乎无法正确获取请求的格式。有谁知道如何让它工作？当我对WAMP服务器进行测试时，一切正常。感谢

Answer 1

此代码可以帮助您：

char server[]="your_server_name"; 
EthernetClient client;
IPAddress ip(192, 168, 1, 40); // Arduino IP Add
IPAddress myDns(8,8,8,8);  // DNS 
IPAddress myGateway(192,168,1,1);  // your gateway

void setup() {
  Serial.begin(9600);
  // start the Ethernet connection:
  if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");
     // try to congifure using IP address instead of DHCP:
     Ethernet.begin(mac,ip,myDns,myGateway);
  }
}

在循环（）中：

... loop funcion
if (client.connect(server,80))  // Server port
{
  client.println("GET /getData HTTP/1.0\r\n");
  client.println("HOST: host_name\r\n");
  client.println("\r\n");
}

Arduino向Google应用引擎发出GET请求

1 个答案: