C2DM，IOException异常时发送消息 [英] C2DM, IOException when sending message
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问题描述
我不能让C2DM的发送部分工作。
I can't get the sending part of C2DM to work. I get IOException at OutputStream out = conn.getOutputStream();
public void sendMessage() throws IOException{
String key = readFileAsString("acct/"+to+"/key");
StringBuilder postDataBuilder = new StringBuilder();
postDataBuilder.append("registration_id").append("=").append(key);
postDataBuilder.append("&").append("collapse_key").append("=").append("0");
postDataBuilder.append("&").append("data.payload").append("=").append(URLEncoder.encode(to+"--"+"acct/"+to+"/1", UTF8));
byte[] postData = postDataBuilder.toString().getBytes(UTF8);
URL url = new URL("https://android.apis.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");
conn.setRequestProperty("Content-Length", Integer.toString(postData.length));
conn.setRequestProperty("Authorization", "GoogleLogin auth=" + cl);
//------------------
OutputStream out = conn.getOutputStream();
//--------------------------
out.write(postData);
out.close();
int sw =conn.getResponseCode();
System.out.println(""+sw);
switch (sw) {
case 200:
System.out.println("Success, but check for errors in the body");
break;
case 503:
System.out.println("Service unavailable");
break;
case 401:
System.out.println(" Invalid authentication token");
break;
}
}
感谢您！
推荐答案
解决方案最常用给予解决您收到错误消息来定义自定义主机名验证。你面临的主要问题是，谷歌的Android URL返回的域名是* .google.com。不幸的是，这会导致一些问题，因为Android的SDK是android.apis.google.com。该JVM将不会验证默认情况下这个组合（* .sdk.google.com是可以接受的）。
The solution most commonly given to resolve the error message you are receiving is to define a custom Hostname validation. The main problem that you are facing is that the domain name returned by Google's Android URL is *.google.com. Unfortunately, this causes some issues as the Android SDK is at android.apis.google.com. The JVM will not validate this combination by default (*.sdk.google.com would be acceptable).
下面是如何创建自己的主机名验证器的例子：
Here is an example of how you can create your own hostname validator:
URL url = new URL("https://android.apis.google.com/c2dm/send");
HostnameVerifier hVerifier = new HostnameVerifier() {
public boolean verify(String hostname, SSLSession
session) {
return true;
}
};
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setHostnameVerifier(hVerifier);
如果你改变code到类似上述的东西，你提到的错误应该纠正。
If you change your code to something similar to above, the error you mentioned should be corrected.
修改结果
下面是一些测试code，它是在我的开发环境功能齐全。刚刚更新的验证信息与应用程序的特定信息来运行：
EDIT
Here is some test code that is fully functional in my dev environment. Just updated the authentication information with your application specific information to run:
public class C2DMTest {
public static void main(String... args) throws Exception {
String auth = authorize();
if (auth == null) {
System.out.println("No authorization returned");
System.exit(1);
}
sendMessage(auth);
}
/**
* Perform an authorization request to access Google's C2DM
* API.
*
* @return The retrieved authorization request.
*/
private static String authorize() throws Exception {
String accountType = "GOOGLE";
String service = "ac2dm";
String source = "replace-me";
String email = "replace-me";
String passwd = "replace-me";
StringBuilder params = new StringBuilder();
params.append("accountType=").append(accountType)
.append("&Email=").append(URLEncoder.encode(email, UTF8))
.append("&Passwd=").append(URLEncoder.encode(passwd, UTF8))
.append("&service=").append(service)
.append("&source=").append(source);
byte[] postData = params.toString().getBytes(UTF8);
URL url = new URL("https://www.google.com/accounts/ClientLogin");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", Integer.toString(postData.length));
//------------------
OutputStream out = conn.getOutputStream();
//--------------------------
out.write(postData);
out.close();
int sw = conn.getResponseCode();
System.out.println("" + sw);
switch (sw) {
case 503:
System.out.println("Service unavailable");
break;
case 401:
System.out.println(" Invalid authentication token");
break;
default:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
InputStream in = conn.getInputStream();
byte[] bytes = new byte[100];
int len = -1;
while ((len = in.read(bytes)) != -1) {
baos.write(bytes, 0, len);
}
in.close();
String input = baos.toString();
Map<String, String> res = parseResponse(input);
return res.get("Auth");
}
return null;
}
/**
* Parses a response string into a usable data map.
*
* @param response The response from Google
* @return A Map representation.
*/
private static Map<String, String> parseResponse(String response) {
Map<String, String> map = new HashMap<String, String>();
if (response != null) {
String[] lines = response.split("\n");
for (String line : lines) {
String[] parts = line.split("=");
if (parts.length == 2) {
map.put(parts[0], parts[1]);
}
}
}
return map;
}
private static String UTF8 = "UTF-8";
/**
* Send message to mobile device.
*
* @param cl Google API auth code.
*/
public static void sendMessage(String cl) throws IOException {
String key = "invalid";
StringBuilder postDataBuilder = new StringBuilder();
postDataBuilder.append("registration_id").append("=").append(key);
postDataBuilder.append("&").append("collapse_key").append("=").append("0");
postDataBuilder.append("&").append("data.payload").append("=").append(URLEncoder.encode("test-content", UTF8));
byte[] postData = postDataBuilder.toString().getBytes(UTF8);
URL url = new URL("https://android.apis.google.com/c2dm/send");
HostnameVerifier hVerifier = new HostnameVerifier() {
public boolean verify(String hostname, SSLSession
session) {
return true;
}
};
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setHostnameVerifier(hVerifier);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", Integer.toString(postData.length));
conn.setRequestProperty("Authorization", "GoogleLogin auth="+cl);
//------------------
OutputStream out = conn.getOutputStream();
//--------------------------
out.write(postData);
out.close();
int sw = conn.getResponseCode();
System.out.println("" + sw);
switch (sw) {
case 200:
System.out.println("Success, but check for errors in the body");
break;
case 503:
System.out.println("Service unavailable");
break;
case 401:
System.out.println(" Invalid authentication token");
break;
}
}
}
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