我已经使用Android Studio设置了一个端点项目。一切都运行得很好，直到我配置本地开发服务器在真正的Android设备而不是模拟器上进行测试。从那以后，本地开发服务器似乎不再公开_ah / api /。
服务器正在运行，我可以从localhost和Android设备访问它。它服务于root的静态网站，它服务于_ah / admin，但它无法提供_ah / api / explorer，而且web服务似乎也无法正常工作。
访问Api Explorer时，服务器出现以下错误：
http://localhost:8080/_ah/api/explorer
HTTP ERROR 500
Problem accessing /_ah/api/explorer. Reason:
Error while processing method void in API api VERSION v1
Caused by:
java.lang.IllegalArgumentException: Error while processing method void in API api VERSION v1
at com.google.api.server.spi.tools.devserver.PathTrie.add(PathTrie.java:61)
at com.google.api.server.spi.tools.devserver.PathTrie.<init>(PathTrie.java:42)
at com.google.api.server.spi.tools.devserver.RestApiServlet.loadApiConfigs(RestApiServlet.java:111)
at com.google.api.server.spi.tools.devserver.ApiServlet.initConfigsIfNecessary(ApiServlet.java:71)
at com.google.api.server.spi.tools.devserver.RestApiServlet.service(RestApiServlet.java:117)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.tools.appstats.AppstatsFilter.doFilter(AppstatsFilter.java:142)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.googlecode.objectify.cache.AsyncCacheFilter.doFilter(AsyncCacheFilter.java:58)
at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:491)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: java.lang.IllegalArgumentException: Path '/post/api/v1/void' is already mapped
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:111)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:126)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:126)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:126)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:126)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.access$100(PathTrie.java:88)
at com.google.api.server.spi.tools.devserver.PathTrie.add(PathTrie.java:58)
... 45 more
Caused by:
java.lang.IllegalArgumentException: Path '/post/api/v1/void' is already mapped
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:111)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:126)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:126)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:126)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.add(PathTrie.java:126)
at com.google.api.server.spi.tools.devserver.PathTrie$PathTrieNode.access$100(PathTrie.java:88)
at com.google.api.server.spi.tools.devserver.PathTrie.add(PathTrie.java:58)
at com.google.api.server.spi.tools.devserver.PathTrie.<init>(PathTrie.java:42)
at com.google.api.server.spi.tools.devserver.RestApiServlet.loadApiConfigs(RestApiServlet.java:111)
at com.google.api.server.spi.tools.devserver.ApiServlet.initConfigsIfNecessary(ApiServlet.java:71)
at com.google.api.server.spi.tools.devserver.RestApiServlet.service(RestApiServlet.java:117)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.tools.appstats.AppstatsFilter.doFilter(AppstatsFilter.java:142)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.googlecode.objectify.cache.AsyncCacheFilter.doFilter(AsyncCacheFilter.java:58)
at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:48)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:491)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
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“java.lang.IllegalArgumentException：Path'/ post / api / v1 / void'已经映射”对我来说很奇怪。谁能告诉我在哪里看？ “/ void”听起来像一种奇怪的方法。
我的gradle.build看起来像这样：
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.google.appengine:gradle-appengine-plugin:1.9.5'
}
}
repositories {
mavenCentral();
}
apply plugin: 'java'
apply plugin: 'war'
apply plugin: 'appengine'
sourceCompatibility = 1.7
targetCompatibility = 1.7
dependencies {
appengineSdk 'com.google.appengine:appengine-java-sdk:1.9.5'
compile 'com.google.appengine:appengine-endpoints:1.9.5'
compile 'com.google.appengine:appengine-endpoints-deps:1.9.5'
compile 'javax.servlet:servlet-api:2.5'
compile 'com.googlecode.objectify:objectify:5.0.2'
}
appengine {
downloadSdk = true
appcfg {
oauth2 = true
}
endpoints {
getClientLibsOnBuild = true
getDiscoveryDocsOnBuild = true
}
}
这是我的web.xml：
<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" version="2.5">
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
<!-- Endpoints configuration -->
<servlet>
<servlet-name>SystemServiceServlet</servlet-name>
<servlet-class>com.google.api.server.spi.SystemServiceServlet</servlet-class>
<init-param>
<param-name>services</param-name>
<param-value>
<!-- Registration endpoints -->
cc.closeup.backend.endpoints.AccountEndpoint, cc.closeup.backend.endpoints.AccountsEndpoint,
cc.closeup.backend.endpoints.ProfileEndpoint,
cc.closeup.backend.endpoints.RegistrationEndpoint,
cc.closeup.backend.endpoints.SessionEndpoint, cc.closeup.backend.endpoints.SessionsEndpoint,
cc.closeup.backend.endpoints.UserEndpoint,
<!-- Graph endpoints -->
cc.closeup.backend.endpoints.LikeEndpoint, cc.closeup.backend.endpoints.LikesEndpoint,
cc.closeup.backend.endpoints.MessageEndpoint, cc.closeup.backend.endpoints.MessagesEndpoint,
cc.closeup.backend.endpoints.RelationEndpoint, cc.closeup.backend.endpoints.RelationsEndpoint,
<!-- Tile endpoints -->
cc.closeup.backend.endpoints.TileEndpoint, cc.closeup.backend.endpoints.TilesEndpoint,
cc.closeup.backend.endpoints.LayerEndpoint, cc.closeup.backend.endpoints.LayersEndpoint
</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>SystemServiceServlet</servlet-name>
<url-pattern>/_ah/spi/*</url-pattern>
</servlet-mapping>
<!-- Objectify configuration -->
<filter>
<filter-name>ObjectifyFilter</filter-name>
<filter-class>com.googlecode.objectify.ObjectifyFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>ObjectifyFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Appstats configuration -->
<filter>
<filter-name>appstats</filter-name>
<filter-class>com.google.appengine.tools.appstats.AppstatsFilter</filter-class>
<init-param>
<param-name>calculateRpcCosts</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>appstats</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>appstats</servlet-name>
<servlet-class>com.google.appengine.tools.appstats.AppstatsServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>appstats</servlet-name>
<url-pattern>/appstats/*</url-pattern>
</servlet-mapping>
<security-constraint>
<web-resource-collection>
<web-resource-name>appstats</web-resource-name>
<url-pattern>/appstats/*</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>admin</role-name>
</auth-constraint>
</security-constraint>
</web-app>
服务器启动日志如下所示（Windows）：
"C:\Program Files\Java\jdk1.8.0_05\bin\java" "-javaagent:C:\Users\Oliver Hausler\.gradle\appengine-sdk\appengine-java-sdk-1.9.1\lib\agent\appengine-agent.jar" "-Xbootclasspath/p:C:\Users\Oliver Hausler\.gradle\appengine-sdk\appengine-java-sdk-1.9.1\lib\override\appengine-dev-jdk-overrides.jar" -Didea.launcher.port=7536 "-Didea.launcher.bin.path=C:\Users\Oliver Hausler\AppData\Local\Android\android-studio\bin" -Dfile.encoding=windows-1252 -classpath "C:\Users\Oliver Hausler\.gradle\appengine-sdk\appengine-java-sdk-1.9.1\lib\appengine-tools-api.jar;C:\Users\Oliver Hausler\AppData\Local\Android\android-studio\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain com.google.appengine.tools.development.DevAppServerMain --address=0.0.0.0 --port=8080 "C:\Users\Oliver Hausler\AndroidStudioProjects\csnty.android\source\Gangstas\backend\build\exploded-app"
Jun 07, 2014 9:09:46 PM com.google.appengine.tools.development.agent.AppEngineDevAgent premain
SEVERE: Unable to load the App Engine dev agent. Security restrictions will not be completely emulated.
java.lang.RuntimeException: Unexpected exception during cast.
at com.google.apphosting.utils.clearcast.ClearCast$CasterImpl.cast(ClearCast.java:385)
at com.google.apphosting.utils.clearcast.ClearCast.staticCast(ClearCast.java:252)
at com.google.apphosting.utils.clearcast.ClearCast.staticCast(ClearCast.java:263)
at com.google.appengine.tools.development.agent.AppEngineDevAgent.premain(AppEngineDevAgent.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:386)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:401)
Caused by: java.lang.IllegalAccessException: Class com.google.apphosting.utils.clearcast.ClearCast$CasterImpl can not access a member of class com.google.appengine.tools.development.agent.$Proxy0 with modifiers "public"
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:101)
at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:295)
at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:287)
at java.lang.reflect.Constructor.newInstance(Constructor.java:398)
at com.google.apphosting.utils.clearcast.ClearCast$CasterImpl.cast(ClearCast.java:383)
... 9 more
Jun 07, 2014 9:09:47 PM java.util.prefs.WindowsPreferences <init>
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
********************************************************
There is a new version of the SDK available.
-----------
Latest SDK:
Release: 1.9.5
Timestamp: Wed Apr 30 18:55:22 PDT 2014
API versions: [1.0]
-----------
Your SDK:
Release: 1.9.1
Timestamp: Wed Mar 12 16:46:05 PDT 2014
API versions: [1.0]
-----------
Please visit https://developers.google.com/appengine/downloads for the latest SDK.
********************************************************
Jun 07, 2014 9:09:49 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
INFO: Successfully processed C:\Users\Oliver Hausler\AndroidStudioProjects\csnty.android\source\Gangstas\backend\build\exploded-app\WEB-INF/appengine-web.xml
Jun 07, 2014 9:09:49 PM com.google.apphosting.utils.config.AbstractConfigXmlReader readConfigXml
INFO: Successfully processed C:\Users\Oliver Hausler\AndroidStudioProjects\csnty.android\source\Gangstas\backend\build\exploded-app\WEB-INF/web.xml
Jun 07, 2014 9:09:49 PM com.google.appengine.tools.development.SystemPropertiesManager setSystemProperties
INFO: Overwriting system property key 'java.util.logging.config.file', value 'C:\Users\Oliver Hausler\.gradle\appengine-sdk\appengine-java-sdk-1.9.1\config\sdk\logging.properties' with value 'WEB-INF/logging.properties' from 'C:\Users\Oliver Hausler\AndroidStudioProjects\csnty.android\source\Gangstas\backend\build\exploded-app\WEB-INF\appengine-web.xml'
Jun 07, 2014 9:09:50 PM com.google.apphosting.utils.jetty.JettyLogger info
INFO: Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
Jun 07, 2014 9:09:51 PM com.google.apphosting.utils.jetty.JettyLogger info
INFO: jetty-6.1.x
Jun 07, 2014 9:09:53 PM com.google.apphosting.utils.jetty.JettyLogger info
INFO: Started SelectChannelConnector@0.0.0.0:8080
Jun 07, 2014 9:09:53 PM com.google.appengine.tools.development.AbstractModule startup
INFO: Module instance default is running at http://localhost:8080/
Jun 07, 2014 9:09:53 PM com.google.appengine.tools.development.AbstractModule startup
INFO: The admin console is running at http://localhost:8080/_ah/admin
Jun 07, 2014 9:09:53 PM com.google.appengine.tools.development.DevAppServerImpl doStart
INFO: Dev App Server is now running
答案 0 :(得分：0)
解决方案非常简单。不像我最初想的那样是服务器错误配置，而是我在端点类中返回void的简单错误，REST似乎不允许这样做。
WRONG：
@ApiMethod(name = "layer.insert")
public void insertLayer(
final Layer layer
) {
//...
}
GOOD：
@ApiMethod(name = "layer.insert")
public Layer insertLayer(
final Layer layer
) {
//...
return layer;
}
所以，即使你不需要回报，也要给谷歌一些钱并且总是返回结果; - （
答案 1 :(得分：0)
如果您不打算返回任何数据，请尝试将httpMethod设置为POST
@ApiMethod(name = "layer.insert", httpMethod = ApiMethod.HttpMethod.POST)