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appengine-sockets-python-java-go

Python, Java, and Go examples of using the App Engine Socket API.

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appengine-sockets-python-java-go's Issues

org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException

Followed the Java example and getting this error:

[INFO] Mar 23, 2017 5:02:20 PM org.apache.jasper.compiler.JDTCompiler$1 findType
[INFO] SEVERE: Compilation error
[INFO] org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException
[INFO] 	at org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader.<init>(ClassFileReader.java:342)
[INFO] 	at org.apache.jasper.compiler.JDTCompiler$1.findType(JDTCompiler.java:206)
[INFO] 	at org.apache.jasper.compiler.JDTCompiler$1.findType(JDTCompiler.java:163)
[INFO] 	at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:96)
[INFO] 	at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:49)
[INFO] 	at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:97)
[INFO] 	at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:167)
[INFO] 	at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2187)
[INFO] 	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:974)
[INFO] 	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1164)
[INFO] 	at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:366)
[INFO] 	at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:623)
[INFO] 	at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:392)
[INFO] 	at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:429)
[INFO] 	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:349)
[INFO] 	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)
[INFO] 	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
[INFO] 	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)
[INFO] 	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
[INFO] 	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
[INFO] 	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
[INFO] 	at com.google.appengine.tools.development.PrivilegedJspServlet.access$101(PrivilegedJspServlet.java:23)
[INFO] 	at com.google.appengine.tools.development.PrivilegedJspServlet$2.run(PrivilegedJspServlet.java:61)
[INFO] 	at java.security.AccessController.doPrivileged(Native Method)
[INFO] 	at com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java:58)
[INFO] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
[INFO] 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
[INFO] 	at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
[INFO] 	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
[INFO] 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
[INFO] 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
[INFO] 	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[INFO] 	at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
[INFO] 	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327)
[INFO] 	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
[INFO] 	at com.google.appengine.tools.development.StaticFileUtils.serveWelcomeFileAsForward(StaticFileUtils.java:82)
[INFO] 	at com.google.appengine.tools.development.LocalResourceFileServlet.maybeServeWelcomeFile(LocalResourceFileServlet.java:254)
[INFO] 	at com.google.appengine.tools.development.LocalResourceFileServlet.doGet(LocalResourceFileServlet.java:120)
[INFO] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
[INFO] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
[INFO] 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
[INFO] 	at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
[INFO] 	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
[INFO] 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
[INFO] 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
[INFO] 	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[INFO] 	at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
[INFO] 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[INFO] 	at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:490)
[INFO] 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[INFO] 	at org.mortbay.jetty.Server.handle(Server.java:326)
[INFO] 	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
[INFO] 	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
[INFO] 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
[INFO] 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
[INFO] 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
[INFO] 	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
[INFO] 	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
[INFO] 
[INFO] 2017-03-23 17:02:20.953:WARN::/
[INFO] org.apache.jasper.JasperException: Unable to compile class for JSP: ||An error occurred at line: 1 in the generated java file|The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files||Stacktrace:
[INFO] 	at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
[INFO] 	at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
[INFO] 	at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439)
[INFO] 	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:349)
[INFO] 	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)
[INFO] 	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
[INFO] 	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)
[INFO] 	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
[INFO] 	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
[INFO] 	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
[INFO] 	at com.google.appengine.tools.development.PrivilegedJspServlet.access$101(PrivilegedJspServlet.java:23)
[INFO] 	at com.google.appengine.tools.development.PrivilegedJspServlet$2.run(PrivilegedJspServlet.java:61)
[INFO] 	at java.security.AccessController.doPrivileged(Native Method)
[INFO] 	at com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java:58)
[INFO] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
[INFO] 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
[INFO] 	at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
[INFO] 	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
[INFO] 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
[INFO] 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
[INFO] 	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[INFO] 	at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
[INFO] 	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327)
[INFO] 	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
[INFO] 	at com.google.appengine.tools.development.StaticFileUtils.serveWelcomeFileAsForward(StaticFileUtils.java:82)
[INFO] 	at com.google.appengine.tools.development.LocalResourceFileServlet.maybeServeWelcomeFile(LocalResourceFileServlet.java:254)
[INFO] 	at com.google.appengine.tools.development.LocalResourceFileServlet.doGet(LocalResourceFileServlet.java:120)
[INFO] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
[INFO] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
[INFO] 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
[INFO] 	at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
[INFO] 	at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
[INFO] 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
[INFO] 	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
[INFO] 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
[INFO] 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
[INFO] 	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
[INFO] 	at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
[INFO] 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[INFO] 	at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:490)
[INFO] 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
[INFO] 	at org.mortbay.jetty.Server.handle(Server.java:326)
[INFO] 	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
[INFO] 	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
[INFO] 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
[INFO] 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
[INFO] 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
[INFO] 	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
[INFO] 	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

This repository is not maintained

The go example has been "coming soon" for more than three years, there is a java bug fix in a PR that is three years old, and the python example is now broken. This is not a complaint or a troll but a warning to developers who may find this repo while looking for help: here be dragons.

ImportError: No module named pwd

Running with Python 2.7.6 and App Engine SDK 1.9.18 I have this error:

INFO 2015-02-25 15:08:18,340 module.py:737] default: "POST /_ah/channel/connected/ HTTP/1.1" 404 52
INFO 2015-02-25 15:08:24,482 main.py:129] got newsgroup: sci.physics
ERROR 2015-02-25 15:08:26,125 main.py:148] something went wrong...
Traceback (most recent call last):
File "/Users/coto/Desktop/appengine-sockets-python-java-go-master/python_socket_demo/main.py", line 137, in getPosts
s = nntplib.NNTP(NNTP_SERVER)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/nntplib.py", line 146, in init
import netrc
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/netrc.py", line 7, in
import pwd
File "/Users/coto/google-cloud-sdk/platform/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/devappserver2/python/sandbox.py", line 945, in load_module
raise ImportError('No module named %s' % fullname)
ImportError: No module named pwd

Socket API example (python) is not really a simple example on how to use sockets

I would have expected something along the lines of:

import socket

size = 1024
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((MESSAGE_HUB_ADRESS, COMMAND_SERVER_PORT))
sock.send(message)
dataReceived = 'dummy'
total = ''
while dataRecieved != '':
    dataRecieved sock.recv(size)
    total += dataRecieved

But in the examples socket is not imported once.
Is there a reason for not showing how to use sockets?
An nntp example is perhaps also nice but rather step 2 or 3 instead of step 1

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