我想向我的设备发送 natification 消息，但我有这个错误
com.google.android.gcm.server.InvalidRequestException: HTTP Status Code: 404
我不确定为什么。
这是我的代码
package com.avilyne.gcm;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.google.android.gcm.server.Message;
import com.google.android.gcm.server.MulticastResult;
import com.google.android.gcm.server.Sender;
public class GCMBroadcast extends HttpServlet {
private static final String myApiKey = "AIzaSyAHUdHy-7o-XJS59mhAzUUoTqn-EUb9s88";
private static final String regID = "APA91bHUcUuv3ViHfIkZg7YyKeiq3Ta1WVqEWrdIs9AZwdQ2nfSA2r-9BcH4WxRnAb0mHXEqEi7WMngPKQyrzcP5EhCFLqsprJpscHLIyi8gK80SdMpHluLBk3iRUCQTShY8szNvy3f4IBiGZv75ioe-Ai8wnZLqKw";
private List<String> androidTargets = new ArrayList<String>();
private static final long serialVersionUID = 1L;
public GCMBroadcast() {
super();
androidTargets.add(regID);
}
/*protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost( req, resp);*/
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String userMessage = "";
userMessage = req.getParameter("Message");
Sender sender = new Sender(myApiKey);
Message message = new Message.Builder().addData("Message", userMessage)
.build();
MulticastResult result = sender.send(message, androidTargets, 1);
if (result.getResults() != null) {
int canonicalRegId = result.getCanonicalIds();
if (canonicalRegId != 0) {
}
} else {
int error = result.getFailure();
System.out.println("Broadcast failure: " + error);
}
req.setAttribute("Message", userMessage);
req.getRequestDispatcher("index.jsp").forward(req, resp);
}
}
当我在没有 doGet 方法的情况下尝试此代码时，它会返回“HTTP 状态 405 - 此 URL 不支持 HTTP 方法 GET”此错误。İf ı 添加 doGet 方法并在 doGet 中调用 doPost 方法。它返回“HTTP 状态 500 - HTTP 状态代码：404（未找到
未找到
错误 404
)"当我尝试将消息发送到服务器时收到的完整错误消息是：
com.google.android.gcm.server.InvalidRequestException: HTTP Status Code: 404(<HTML>
<HEAD>
<TITLE>Not Found</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>Not Found</H1>
<H2>Error 404</H2>
</BODY>
</HTML>)
at com.google.android.gcm.server.Sender.sendNoRetry(Sender.java:367)
at com.google.android.gcm.server.Sender.send(Sender.java:261)
at com.avilyne.gcm.GCMBroadcast.doPost(GCMBroadcast.java:49)
at com.avilyne.gcm.GCMBroadcast.doGet(GCMBroadcast.java:35)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
我不知道为什么我会收到这个错误。任何人都可以帮忙吗？该文档没有说明 404 代码。
即web.xml代码；
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<servlet>
<servlet-name>GCMBroadcast</servlet-name>
<servlet-class>com.avilyne.gcm.GCMBroadcast</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>GCMBroadcast</servlet-name>
<url-pattern>/GCMBroadcast</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
那就是 index.jsp 代码；
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<%
// retrieve our passed CollapseKey and Message parameters, if they exist.
String message = "Generic Broadcast Message";
Object msgObj = request.getAttribute("Message");
if (msgObj != null) {
message = msgObj.toString();
}
%>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Android GCM Broadcast</title>
</head>
<body>
<h2>GCM Broadcast Demo</h2>
<form action="GCMBroadcast" method="post">
<label>Broadcast Message </label>
<br/><textarea name="Message" rows="3" cols="60" ><%=message %> </textarea>
<br/><input type="submit" name="submit" value="Submit" />
</form>
</body>
</html>