【发布时间】:2012-05-09 22:42:44
【问题描述】:
我正在尝试使用 google c2dm 在 android 设备上发送推送通知,但我遇到了一个小问题。 当我尝试发送消息时,我收到此异常“java.IOException Received Authentication Challenge is Null”,我不知道自己做错了什么。我正在使用Vogella tutorial 发送 c2dm。
public static String getToken(String email, String password)
throws IOException {
// Create the post data
// Requires a field with the email and the password
StringBuilder builder = new StringBuilder();
builder.append("Email=").append(email);
builder.append("&Passwd=").append(password);
builder.append("&accountType=GOOGLE");
builder.append("&source=MyLittleExample");
builder.append("&service=ac2dm");
// Setup the Http Post
byte[] data = builder.toString().getBytes();
URL url = new URL("https://www.google.com/accounts/ClientLogin");
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setUseCaches(false);
con.setDoOutput(true);
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
con.setRequestProperty("Content-Length", Integer.toString(data.length));
// Issue the HTTP POST request
OutputStream output = con.getOutputStream();
output.write(data);
output.close();
// Read the response
BufferedReader reader = new BufferedReader(new InputStreamReader(
con.getInputStream()));
String line = null;
String auth_key = null;
while ((line = reader.readLine()) != null) {
if (line.startsWith("Auth=")) {
auth_key = line.substring(5);
}
}
// Finally get the authentication token
// To something useful with it
return auth_key;
}
身份验证令牌很好,并返回 200 代码。但是发送消息失败
public static int sendMessage(String auth_token, String registrationId,
String message) throws IOException {
StringBuilder postDataBuilder = new StringBuilder();
postDataBuilder.append(PARAM_REGISTRATION_ID).append("=")
.append(registrationId);
postDataBuilder.append("&").append(PARAM_COLLAPSE_KEY).append("=")
.append("0");
postDataBuilder.append("&").append("data.payload").append("=")
.append(URLEncoder.encode(message, UTF8));
byte[] postData = postDataBuilder.toString().getBytes(UTF8);
// Hit the dm URL.
URL url = new URL("https://android.apis.google.com/c2dm/send");
HttpsURLConnection
.setDefaultHostnameVerifier(new CustomizedHostnameVerifier());
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded;charset=UTF-8");
conn.setRequestProperty("Content-Length",
Integer.toString(postData.length));
conn.setRequestProperty("Authorization", "GoogleLogin auth="
+ auth_token);
OutputStream out = conn.getOutputStream();
out.write(postData);
out.close();
int responseCode = conn.getResponseCode();
return responseCode;
}
据我从其他帖子中了解到,此错误表示 401 代码,但我无法理解其原因,身份验证令牌很好。
【问题讨论】:
-
我只是尝试使用 curl 命令发送消息并获得 200 代码,但推送消息未到达我的设备。我不知道为什么。之后我再次尝试从我的代码发送推送,也得到了代码 200。
标签: android authentication android-c2dm