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这里此代码是一个正常的Java应用程序不是一个Android应用程序，这是为了C2DM消息发送到设备与YOUR_REGISTRATION_STRING与AUTH_KEY开发商，问题在下面HttpURLConnection c = URL.openConnection（）; c.setRequestProperty（）不工作
描述import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSession;
public class C2DMSendMessage {
private final static String AUTH = "authentication";
private static final String UPDATE_CLIENT_AUTH = "Update-Client-Auth";
public static final String PARAM_REGISTRATION_ID = "registration_id";
public static final String PARAM_DELAY_WHILE_IDLE = "delay_while_idle";
public static final String PARAM_COLLAPSE_KEY = "collapse_key";
private static final String UTF8 = "UTF-8";
// Registration is currently hardcoded
private final static String YOUR_REGISTRATION_STRING = "APA91bGf8gkFMn_sBP_hosSAiqUmmLwOdIqVSQKbbqXv2WSADQ51gbixInAGUk1U_vDIcz7izVaq6tvu8KXGsiQ7BIKy_7f04id00SUms8h3YGxbsKd6Jjg";
public static void main(String[] args) throws Exception {
HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String arg0, SSLSession arg1) {
// TODO Auto-generated method stub
return true;
}
});
String auth_key = "DQAAAA4BAADAb7BDi6KY9pj11ERiY0R1TaEynLK6AtSPxzzIeCih_VDyWLhEJCvmkXjh6gRAsGpLb0wtAGmWIK9CjsBMT3upjnZ86tRYnvfOknkN45ORk29AsR2he-JEo1Y4eVcUutoPnBbIX2kzoEeY2ULYXyOQix7oWSWb4CJS3XYrb7qcmQxMv3yiIAF8kO0Sav7-NspCSI3tV3lISrz_BWqSCVGHWxT6KZ_PZwjH7442CpMfZhOYxsgDanQod8EypHjHmNQK_txWwFeiFj66jsi90BpyPKvUX_ZUbOmSKVZP3gBcKrK9iSnJrSUpLuEN46NGRzl2uBg9I9V-wJuFBgG1aBXqA1oWFdkEewxwXapuVqR1-g";
// Send a sync message to this Android device.
StringBuilder postDataBuilder = new StringBuilder();
postDataBuilder.append(PARAM_REGISTRATION_ID).append("=")
.append(YOUR_REGISTRATION_STRING);
// if (delayWhileIdle) {
// postDataBuilder.append("&").append(PARAM_DELAY_WHILE_IDLE)
// .append("=1");
// }
postDataBuilder.append("&").append(PARAM_COLLAPSE_KEY).append("=")
.append("0");
postDataBuilder.append("&").append("data.payload").append("=")
.append(URLEncoder.encode("Lars war hier", UTF8));
byte[] postData = postDataBuilder.toString().getBytes(UTF8);
// Hit the dm URL.
URL url = new URL("https://android.clients.google.com/c2dm/send");
HttpURLConnection conn = (HttpURLConnection) 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_key);
System.out.println(conn.getRequestProperties());
OutputStream out = conn.getOutputStream();
out.write(postData);
out.close();
int responseCode = conn.getResponseCode();
System.out.println(String.valueOf(responseCode));
// Validate the response code
if (responseCode == 401 || responseCode == 403) {
// The token is too old - return false to retry later, will
// fetch the token
// from DB. This happens if the password is changed or token
// expires. Either admin
// is updating the token, or Update-Client-Auth was received by
// another server,
// and next retry will get the good one from database.
System.out.println("Unauthorized - need token");
}
// Check for updated token header
String updatedAuthToken = conn.getHeaderField(UPDATE_CLIENT_AUTH);
if (updatedAuthToken != null && !auth_key.equals(updatedAuthToken)) {
System.out.println("Got updated auth token from datamessaging servers: "
+ updatedAuthToken);
}
String responseLine = new BufferedReader(new InputStreamReader(
conn.getInputStream())).readLine();
// NOTE: You *MUST* use exponential backoff if you receive a 503
// response code.
// Since App Engine's task queue mechanism automatically does this
// for tasks that
// return non-success error codes, this is not explicitly
// implemented here.
// If we weren't using App Engine, we'd need to manually implement
// this.
if (responseLine == null || responseLine.equals("")) {
System.out.println("Got " + responseCode
+ " response from Google AC2DM endpoint.");
throw new IOException(
"Got empty response from Google AC2DM endpoint.");
}
String[] responseParts = responseLine.split("=", 2);
if (responseParts.length != 2) {
System.out.println("Invalid message from google: " + responseCode
+ " " + responseLine);
throw new IOException("Invalid response from Google "
+ responseCode + " " + responseLine);
}
if (responseParts[0].equals("id")) {
System.out.println("Successfully sent data message to device: "
+ responseLine);
}
if (responseParts[0].equals("Error")) {
String err = responseParts[1];
System.out.println("Got error response from Google datamessaging endpoint: "
+ err);
// No retry.
throw new IOException(err);
}
}
}
但它是不相关的
URL url = new URL("https://android.clients.google.com/c2dm/send");
HttpURLConnection conn = (HttpURLConnection) 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_key);
System.out.println(conn.getRequestProperties());
在我已经重复我试图设置请求属性其中3但只有1没有到达的部分hashmap in conn 这是输出：
{的Content-Type = [应用/ X WWW的窗体-urlencoded;字符集= UTF-8]}
我不理解代码如何可以运行，如果它是在它自己的只是那些线 ，而不是提前上班的一个更大的代码部分
我也addRequestProperty试过
感谢
我用conn.setFixedLengthStreamingMode（postdata.length）替换了内容长度行;仍然输出的是请求属性：{Content-Type = [application/x-www-form-urlencoded; charset = UTF-8]} 授权从未输入请求属性：/，注意我也试过了设置的长度为 –
，如你所见n我的代码我正在使用 import java.net.HttpURLConnection;不是太阳httpurl，日食只是不会使用太阳一个 –
该HttpURLConnection是不允许你设置内容的长度，并不会报告给你。授权被明确排除在属性图中返回。我已更新并扩展了我的原始答案，以包含更多评论。 – g051051