java - 我们无法使用 Google App Engine 启动 AppRTC 应用程序

Question

问题

我正在尝试在我的虚拟机（ubuntu 16.04）上构建和部署 apprtc 应用程序。我已经成功部署了对撞机服务器。但是在尝试使用谷歌应用引擎启动 apprtc 应用程序时出现错误。

遵循的步骤

从https://github.com/webrtc/apprtc克隆源代码
根据文档启动对撞机服务器（监听 8080 端口）
使用命令 npm install 进入 apprtc 目录并安装节点包。
使用命令“grunt build”成功构建 apprtc 应用程序。
从https://cloud.google.com/appengine/docs/standard/java/download安装谷歌应用引擎（appengine-java-sdk-1.9.62）

使用以下命令运行 apprtc 应用程序：

DIRECTORY_PATH/appengine-java-sdk-1.9.62/bin/dev_appserver.sh out/app_engine/.

遇到这样的错误

Executing [/usr/lib/jvm/java-8-oracle/jre/bin/java, -javaagent:/home/jishnu/manaf/appengine-java-sdk-1.9.62/lib/agent/appengine-agent.jar, -classpath, /home/jishnu/manaf/appengine-java-sdk-1.9.62/lib/appengine-tools-api.jar, com.google.appengine.tools.development.DevAppServerMain, --property=kickstart.user.dir=/home/jishnu/manaf/apprtc, /home/jishnu/manaf/apprtc/out/app_engine/.]
Feb 08, 2018 5:00:03 PM java.util.prefs.FileSystemPreferences$1 run
INFO: Created user preferences directory.
Feb 08, 2018 5:00:06 PM com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
SEVERE: Received exception processing /home/jishnu/manaf/apprtc/out/app_engine/WEB-INF/appengine-web.xml
com.google.apphosting.utils.config.AppEngineConfigException: Could not locate /home/jishnu/manaf/apprtc/out/app_engine/WEB-INF/appengine-web.xml
    at com.google.apphosting.utils.config.AppEngineWebXmlReader.getInputStream(AppEngineWebXmlReader.java:141)
    at com.google.apphosting.utils.config.AppEngineWebXmlReader.readAppEngineWebXml(AppEngineWebXmlReader.java:75)
    at com.google.apphosting.utils.config.EarHelper.readWebModule(EarHelper.java:178)
    at com.google.appengine.tools.development.ApplicationConfigurationManager$WarModuleConfigurationHandle.readConfiguration(ApplicationConfigurationManager.java:417)
    at com.google.appengine.tools.development.ApplicationConfigurationManager.<init>(ApplicationConfigurationManager.java:158)
    at com.google.appengine.tools.development.ApplicationConfigurationManager.newWarConfigurationManager(ApplicationConfigurationManager.java:100)
    at com.google.appengine.tools.development.ApplicationConfigurationManager.newWarConfigurationManager(ApplicationConfigurationManager.java:86)
    at com.google.appengine.tools.development.DevAppServerImpl.<init>(DevAppServerImpl.java:142)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at com.google.appengine.tools.development.DevAppServerFactory.doCreateDevAppServer(DevAppServerFactory.java:338)
    at com.google.appengine.tools.development.DevAppServerFactory.access$000(DevAppServerFactory.java:31)
    at com.google.appengine.tools.development.DevAppServerFactory$1.run(DevAppServerFactory.java:285)
    at com.google.appengine.tools.development.DevAppServerFactory$1.run(DevAppServerFactory.java:282)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.google.appengine.tools.development.DevAppServerFactory.createDevAppServer(DevAppServerFactory.java:281)
    at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:348)
    at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:45)
    at com.google.appengine.tools.development.DevAppServerMain.run(DevAppServerMain.java:223)
    at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:214)
Caused by: java.io.FileNotFoundException: /home/jishnu/manaf/apprtc/out/app_engine/WEB-INF/appengine-web.xml (No such file or directory)
    at java.io.FileInputStream.open0(Native Method)
    at java.io.FileInputStream.open(FileInputStream.java:195)
    at java.io.FileInputStream.<init>(FileInputStream.java:138)
    at java.io.FileInputStream.<init>(FileInputStream.java:93)
    at com.google.apphosting.utils.config.AppEngineWebXmlReader.getInputStream(AppEngineWebXmlReader.java:137)
    ... 21 more

com.google.apphosting.utils.config.AppEngineConfigException: Invalid configuration
    at com.google.appengine.tools.development.DevAppServerImpl.reportDeferredConfigurationException(DevAppServerImpl.java:435)
    at com.google.appengine.tools.development.DevAppServerImpl.doStart(DevAppServerImpl.java:232)
    at com.google.appengine.tools.development.DevAppServerImpl.access$000(DevAppServerImpl.java:47)
    at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:219)
    at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:217)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:217)
    at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:368)
    at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:45)
    at com.google.appengine.tools.development.DevAppServerMain.run(DevAppServerMain.java:223)
    at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:214)
Caused by: com.google.apphosting.utils.config.AppEngineConfigException: Invalid appengine-web.xml(/home/jishnu/manaf/apprtc/out/app_engine/WEB-INF/appengine-web.xml) - Could not locate /home/jishnu/manaf/apprtc/out/app_engine/WEB-INF/appengine-web.xml
    at com.google.apphosting.utils.config.EarHelper.readWebModule(EarHelper.java:180)
    at com.google.appengine.tools.development.ApplicationConfigurationManager$WarModuleConfigurationHandle.readConfiguration(ApplicationConfigurationManager.java:417)
    at com.google.appengine.tools.development.ApplicationConfigurationManager.<init>(ApplicationConfigurationManager.java:158)
    at com.google.appengine.tools.development.ApplicationConfigurationManager.newWarConfigurationManager(ApplicationConfigurationManager.java:100)
    at com.google.appengine.tools.development.ApplicationConfigurationManager.newWarConfigurationManager(ApplicationConfigurationManager.java:86)
    at com.google.appengine.tools.development.DevAppServerImpl.<init>(DevAppServerImpl.java:142)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at com.google.appengine.tools.development.DevAppServerFactory.doCreateDevAppServer(DevAppServerFactory.java:338)
    at com.google.appengine.tools.development.DevAppServerFactory.access$000(DevAppServerFactory.java:31)
    at com.google.appengine.tools.development.DevAppServerFactory$1.run(DevAppServerFactory.java:285)
    at com.google.appengine.tools.development.DevAppServerFactory$1.run(DevAppServerFactory.java:282)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.google.appengine.tools.development.DevAppServerFactory.createDevAppServer(DevAppServerFactory.java:281)
    at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:348)
    ... 3 more

预期成绩

根据文档，在此步骤之后，我们应该使用http://localhost:443 url 成功访问 apprtc 应用程序。

我遵循的步骤的实际问题是什么？

score 3 · Accepted Answer

com.google.apphosting.utils.config.AppEngineConfigException：找不到/home/jishnu/manaf/apprtc/out/app_engine/WEB-INF/appengine-web.xml

好吧，从apprtc/src/app_engine/app.yaml看起来该应用程序是 Python 应用程序，而不是 Java 应用程序。python应用程序没有WEB-INF/appengine-web.xml。

所以你需要：

在您的 gcloud SDK 中安装 python 支持（如果您尚未安装）或使用 GAE python SDK（请参阅Google 的 App Engine SDK 和 Cloud SDK 之间的关系是什么？）

运行 python 开发服务器，具体取决于您使用的 SDK：

<gcloud_sdk>/bin/dev_appserver.py out/app_engine/.

或者

<gae_python_sdk>/dev_appserver.py out/app_engine/.

这或多或少在README.md您引用的源代码页的 apprtc 中指定：

在本地运行 AppRTC 需要Google App Engine SDK for Python，

...

通过运行 Google App Engine SDK 开发服务器，从 out/app_engine 目录启动 AppRTC 开发服务器，
<path to sdk>/dev_appserver.py ./out/app_engine

java - 我们无法使用 Google App Engine 启动 AppRTC 应用程序

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