The option `-noprompt` doesn&#39;t prompt the input Y/N from a user and assumes `yes`.

More details can found by running command `keytool -importcert -help` on terminal.

As such, keytool is most likely looking for &quot;yes&quot; in your locale (&quot;si&quot; in this case).

I&#39;m trying to go through all of the files in a directory, and if there is a directory, go through all of its files and so on until there are no more directories to go to. Each and every processed item will be added to a results array in the function below. It is not working though I&#39;m not sure what I can do/what I did wrong, but the browser runs insanely slow when this code below is processed, any help is appreciated, thanks!

## Code:

        function getDirContents($dir){
            $results = array();
            $files = scandir($dir);

                foreach($files as $key =&gt; $value){
                    if(!is_dir($dir. DIRECTORY_SEPARATOR .$value)){
                        $results[] = $value;
                    } else if(is_dir($dir. DIRECTORY_SEPARATOR .$value)) {
                        $results[] = $value;
                        getDirContents($dir. DIRECTORY_SEPARATOR .$value);
                    }
                }
        }

        print_r(getDirContents(&#39;/xampp/htdocs/WORK&#39;));

List all the files and folders in a Directory with PHP recursive function

I am trying to work through setting up a nodejs app using express 4.x. After stumbling through the middleware-removal issues, I finally got it working.

however, there was a couple of warning messages in the following line of code :

    app.use(session({secret: &#39;&lt;mysecret&gt;&#39;})

these warnings were :

    Sun, 29 Jun 2014 12:45:10 GMT express-session deprecated pass resave option; default value will change at lib\config\express.js:55:11

    Sun, 29 Jun 2014 12:45:10 GMT express-session deprecated pass saveUninitialized option; default value will change at lib\config\express.js:55:11

in the documentation, the default values for resave and saveUninitialized are true.

so, changing the code to read 

    app.use(session({secret: &#39;&lt;mysecret&gt;&#39;, 
                     saveUninitialized: true,
                     resave: true}));

got rid of the warnings.

So, to get to the point of the question:

why should I have to pass these values in if they are the default values, and why don&#39;t I have to pass in the other options ?



express 4.0 , express-session with odd warning message

Using some batch file, I want to add the untrusted self signed certificate within Java Keystore.

**Command is**

    %JAVA_HOME%/bin/keytool -import -v -trustcacerts -alias server-alias
    -file server.cer -keystore cacerts.jks -keypass changeit -storepass changeit

After running above command, the screen promts for Trust of certificate using Y/N.

    Trust this certificate? [no]:

But I don&#39;t want to provide Y/N here.

Is there a way to complete the import using a single command or some additional import switch if any?


Add Self Signed Certificate without promting Yes/No from User

Using some batch file, I want to add the untrusted self signed certificate within Java Keystore.
Command is
<pre><code class="hljs language-javascript">%JAVA_HOME%/bin/keytool -import -v -trustcacerts -alias server-alias
-file server.cer -keystore cacerts.jks -keypass changeit -storepass changeit
</code></pre>
After running above command, the screen promts for Trust of certificate using Y/N.
<pre><code class="hljs language-kotlin">Trust this certificate? [no]:
</code></pre>
But I don't want to provide Y/N here.
Is there a way to complete the import using a single command or some additional import switch if any?

In our project we are migrating to java 8 and we are testing the new features of it.

On my project I&#39;m using Guava predicates and functions to filter and transform some collections using `Collections2.transform` and `Collections2.filter`. 

On this migration I need to change for example guava code to java 8 changes. So, the changes I&#39;m doing are the kind of:

    List&lt;Integer&gt; naturals = Lists.newArrayList(1,2,3,4,5,6,7,8,9,10,11,12,13);
		
	Function &lt;Integer, Integer&gt; duplicate = new Function&lt;Integer, Integer&gt;(){
		@Override
		public Integer apply(Integer n)
		{
			return n * 2;
		}
	};
		
	Collection result = Collections2.transform(naturals, duplicate);

To...

    List&lt;Integer&gt; result2 = naturals.stream()
		.map(n -&gt; n * 2)
		.collect(Collectors.toList());

Using guava I was very confortable debugging the code since I could debug each transformation process but my concern is how to debug for example `.map(n -&gt; n*2)`.

Using the debugger I can see some code like:

    @Hidden
    @DontInline
    /** Interpretively invoke this form on the given arguments. */
    Object interpretWithArguments(Object... argumentValues) throws Throwable {
        if (TRACE_INTERPRETER)
            return interpretWithArgumentsTracing(argumentValues);
        checkInvocationCounter();
        assert(arityCheck(argumentValues));
        Object[] values = Arrays.copyOf(argumentValues, names.length);
        for (int i = argumentValues.length; i &lt; values.length; i++) {
            values[i] = interpretName(names[i], values);
        }
        return (result &lt; 0) ? null : values[result];
    }

But it isn&#39;t as straighforward as Guava to debug the code, actually I couldn&#39;t find the `n * 2` transformation.

Is there a way to see this transformation or a way to easy debug this code?

**EDIT: I&#39;ve added answer from different comments and posted answers**

Thanks to `Holger` comment that answered my question, the approach of having lambda block allowed me to see the transformation process and debug what happened inside lambda body:

    .map(
		n -&gt; {
			Integer nr = n * 2;
			return nr;
		}
	)

Thanks to `Stuart Marks` the approach of having method references also allowed me to debug the transformation process:

    static int timesTwo(int n) {
		Integer result = n * 2;
	    return result;
	}
    ...
    List&lt;Integer&gt; result2 = naturals.stream()
		.map(Java8Test::timesTwo)
		.collect(Collectors.toList());
    ...


Thanks to `Marlon Bernardes` answer I noticed that my Eclipse doesn&#39;t show what it should and the usage of peek() helped to display results. 

How to debug stream().map(...) with lambda expressions?

I&#39;ve recently updated the android studio IDE to 0.8 to work with the new android L SDK. To start I imported a finished android project that receives no errors in the older version of android studio. In version 0.8 i lines such as

`import android.support.v4.app.Fragment;
`    
get: Support cannot be resolved causing the rest of the code to have errors. The logcat returns 101 instances of 

    Error:(8, 30) error: package android.support.v4.app does not exist

1 for each time I call the support library in an import statement.

I&#39;ve tried

 - reinstalling the IDE
 - deleting contents of idea folder
 - re installing all the SDK&#39;s - including the support libraries 
 - syncing the gradle
 - copying the support library into the libs folder manually
 - rebuilding the project 
 - as well as creating a new project to test the library 

not entirely sure what&#39;s left to do.

package android.support.v4.app does not exist ; in Android studio 0.8

The Enum class is Serializable so there is no problem to serialize object with enums. The other case is where class has fields of java.util.Optional class. In this case the following exception is thrown: java.io.NotSerializableException: java.util.Optional

How to deal with such classes, how to serialize them? Is it possible to send such objects to Remote EJB or through RMI?

This is the example:

    import java.io.ByteArrayOutputStream;
    import java.io.IOException;
    import java.io.ObjectOutputStream;
    import java.io.Serializable;
    import java.util.Optional;
    
    import org.junit.Test;
    
    public class SerializationTest {
    
        static class My implements Serializable {

            private static final long serialVersionUID = 1L;
            Optional&lt;Integer&gt; value = Optional.empty();
    
            public void setValue(Integer i) {
                this.i = Optional.of(i);
            }
    
            public Optional&lt;Integer&gt; getValue() {
                return value;
            }
        }
    
        //java.io.NotSerializableException is thrown

        @Test
        public void serialize() {
            My my = new My();
            byte[] bytes = toBytes(my);
        }
    
        public static &lt;T extends Serializable&gt; byte[] toBytes(T reportInfo) {
            try (ByteArrayOutputStream bstream = new ByteArrayOutputStream()) {
                try (ObjectOutputStream ostream = new ObjectOutputStream(bstream)) {
                    ostream.writeObject(reportInfo);
                }
                return bstream.toByteArray();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
    }


Why java.util.Optional is not Serializable, how to serialize the object with such fields

How can I apply multiple predicates to a `java.util.Stream&#39;s` `filter()` method?

This is what I do now, but I don&#39;t really like it. I have a `Collection` of things and I need to reduce the number of things based on the `Collection` of filters (predicates):

    Collection&lt;Thing&gt; things = someGenerator.someMethod();
    List&lt;Thing&gt; filtered = things.parallelStream().filter(p -&gt; {
       for (Filter f : filtersCollection) {
          if (f.test(p))
            return true;
       }
       return false;
    }).collect(Collectors.toList());

I know that if I knew number of filters up-front, I could do something like this:

    List&lt;Thing&gt; filtered = things.parallelStream().filter(filter1).or(filter2).or(filter3)).collect(Collectors.toList());

But how can I apply unknown number of predicates without mixing programming styles? For know it looks sort of ugly...



How to apply multiple predicates to a java.util.Stream?

I&#39;m writing an application in Java which connects to two web servers via HTTPS. One got a certificate trusted via the default chain of trust, the other uses a self signed certificate. Of course, connecting to the first server worked out of the box, whereas connecting to the server with the self signed certificate did not work until I created a trustStore with the certificate from that server. However, the connection to the by default trusted server does not work any more, because apparently the default trustStore gets to be ignored once I created my own.

One solution I found was to add the certificates from the default trustStore to my own. However, I don&#39;t like this solution, because it requires me to keep managing that trustStore. (I cannot assume these certificates remain static in the foreseeable future, right?)

Apart from that I found two 5 year old threads with a similar problem:

https://stackoverflow.com/questions/1793979/registering-multiple-keystores-in-jvm

https://stackoverflow.com/questions/1788031/how-can-i-have-multiple-ssl-certificates-for-a-java-server

They both go deep into the Java SSL infrastructure. I was hoping that by now there is a more convenient solution which I can explain easily in a security review of my code.

Using a custom truststore in java as well as the default one

I&#39;m trying to build a [Git repo][1] from Jenkins using the [Jenkins Git Plugin][2] on my laptop. The Git repo resides on company trusted server which has self-signed certificates. While specifying the URL I&#39;m always getting an error: 

    Failed to connect to repository : sun.security.validator.ValidatorException:
    PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException:
    unable to find valid certification path to requested target

I understand this error surfaces due to self-signed certificates but the server belongs to my company and is signed by authority.

I also tried to import the same repo from another laptop using self-signed and keep getting the same error.

Any help will be appreciated


  [1]: https://git-scm.com/docs/git-checkout
  [2]: https://wiki.jenkins.io/display/JENKINS/Git+Plugin

Jenkins &quot;unable to find valid certification path to requested target&quot; error while importing Git repository

    root@sclrdev:/home/sclr/certs/FreshCerts# curl --ftp-ssl --verbose ftp://{abc}/ -u trup:trup --cacert /etc/ssl/certs/ca-certificates.crt
    * About to connect() to {abc} port 21 (#0)
    *   Trying {abc}...
    * Connected to {abc} ({abc}) port 21 (#0)
    &lt; 220-Cerberus FTP Server - Home Edition
    &lt; 220-This is the UNLICENSED Home Edition and may be used for home, personal use only
    &lt; 220-Welcome to Cerberus FTP Server
    &lt; 220 Created by Cerberus, LLC
    &gt; AUTH SSL
    &lt; 234 Authentication method accepted
    * successfully set certificate verify locations:
    *   CAfile: /etc/ssl/certs/ca-certificates.crt
      CApath: /etc/ssl/certs
    * SSLv3, TLS handshake, Client hello (1):
    * SSLv3, TLS handshake, Server hello (2):
    * SSLv3, TLS handshake, CERT (11):
    * SSLv3, TLS alert, Server hello (2):
    * SSL certificate problem: unable to get local issuer certificate
    * Closing connection 0
    curl: (60) SSL certificate problem: unable to get local issuer certificate
    More details here: http://curl.haxx.se/docs/sslcerts.html
    
    curl performs SSL certificate verification by default, using a &quot;bundle&quot;
     of Certificate Authority (CA) public keys (CA certs). If the default
     bundle file isn&#39;t adequate, you can specify an alternate file
     using the --cacert option.
    If this HTTPS server uses a certificate signed by a CA represented in
     the bundle, the certificate verification probably failed due to a
     problem with the certificate (it might be expired, or the name might
     not match the domain name in the URL).
    If you&#39;d like to turn off curl&#39;s verification of the certificate, use
     the -k (or --insecure) option.


curl: (60) SSL certificate problem: unable to get local issuer certificate

For testing purposes, I&#39;m trying to add a socket factory to my okHttp client that trusts everything while a proxy is set. This has been done many times over, but my implementation of a trusting socket factory seems to be missing something:

    class TrustEveryoneManager implements X509TrustManager {
        @Override
        public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException { }

        @Override
        public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException { }

        @Override
        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
            return null;
        }
    }
    OkHttpClient client = new OkHttpClient();

    final InetAddress ipAddress = InetAddress.getByName(&quot;XX.XXX.XXX.XXX&quot;); // some IP
    client.setProxy(new Proxy(Proxy.Type.HTTP, new InetSocketAddress(ipAddress, 8888)));

    SSLContext sslContext = SSLContext.getInstance(&quot;TLS&quot;);
    TrustManager[] trustManagers = new TrustManager[]{new TrustEveryoneManager()};
    sslContext.init(null, trustManagers, null);
    client.setSslSocketFactory(sslContext.getSocketFactory);

No requests are being sent out of my app and no exceptions are getting logged so it seems that it&#39;s failing silently within okHttp. Upon further investigation, it seems that there is an Exception being swallowed up in okHttp&#39;s `Connection.upgradeToTls()` when the handshake is being forced. The exception I&#39;m being given is: `javax.net.ssl.SSLException: SSL handshake terminated: ssl=0x74b522b0: SSL_ERROR_ZERO_RETURN occurred. You should never see this.`

The following code produces an `SSLContext` which works like a charm in creating an SSLSocketFactory that doesn&#39;t throw any exceptions:

    protected SSLContext getTrustingSslContext() throws NoSuchAlgorithmException, KeyStoreException, KeyManagementException {
        final SSLContextBuilder trustingSSLContextBuilder = SSLContexts.custom()
                .loadTrustMaterial(null, new TrustStrategy() {
                    @Override
                    public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                        return true; // Accepts any ssl cert whether valid or not.
                    }
                });
        return trustingSSLContextBuilder.build();
    }

The issue is that I&#39;m trying to remove all Apache HttpClient dependencies from my app completely. The underlying code with Apache HttpClient to produce the `SSLContext` seems straightforward enough, but I&#39;m obviously missing something as I cannot configure my `SSLContext` to match this.

Would anyone be able to produce an SSLContext implementation which does what I&#39;d like without using Apache HttpClient?

Trusting all certificates with okHttp

I just downloaded Maven and was trying to run the simple command found on the &quot;Maven in Five Minutes&quot; page (http://maven.apache.org/guides/getting-started/maven-in-five-minutes.html). This is the command:

    mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

When I run it I get an error with SSL certificate and cannot download from the central Maven repository at https://repo.maven.apache.org/maven2. The error is &quot;SunCertPathBuilderException: unable to find valid certification path to requested target&quot;. 

I am sitting behind a corporate firewall and have correctly configured the proxy settings for both `http` and `https` access via the `settings.xml` file. I doubt that everyone who downloads Maven and runs it for the first time has to import the SSL certificate of the Maven repository, so the problem must be with the proxy. Does anyone have any experience with this?

Here&#39;s the stack trace in full debug mode (-X):

   

     mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

    Apache Maven 3.2.3 (33f8c3e1027c3ddde99d3cdebad2656a31e8fdf4; 2014-08-11T22:58:10+02:00)
        Maven home: C:\Projects\maven\bin\..
        Java version: 1.7.0_45, vendor: Oracle Corporation
        Java home: C:\Program Files\Java\jdk1.7.0_45\jre
        Default locale: it_IT, platform encoding: Cp1252
        OS name: &quot;windows 7&quot;, version: &quot;6.1&quot;, arch: &quot;amd64&quot;, family: &quot;windows&quot;
        [DEBUG] Using connector WagonRepositoryConnector with priority 0.0 for https://repo.maven.apache.org/maven2 via *****:8080 with username=*****, password=***
        Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom
        [WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-clean-plugin:2.5: Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5
        org.apache.maven.plugin.PluginResolutionException: Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5
                at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:122)
                at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getPluginDescriptor(DefaultMavenPluginManager.java:148)
                at org.apache.maven.plugin.DefaultBuildPluginManager.loadPlugin(DefaultBuildPluginManager.java:81)
                at org.apache.maven.plugin.prefix.internal.DefaultPluginPrefixResolver.resolveFromProject(DefaultPluginPrefixResolver.java:138)
                at org.apache.maven.plugin.prefix.internal.DefaultPluginPrefixResolver.resolveFromProject(DefaultPluginPrefixResolver.java:121)
                at org.apache.maven.plugin.prefix.internal.DefaultPluginPrefixResolver.resolve(DefaultPluginPrefixResolver.java:85)
                at org.apache.maven.lifecycle.internal.MojoDescriptorCreator.findPluginForPrefix(MojoDescriptorCreator.java:260)
                at org.apache.maven.lifecycle.internal.MojoDescriptorCreator.getMojoDescriptor(MojoDescriptorCreator.java:220)
                at org.apache.maven.lifecycle.internal.DefaultLifecycleTaskSegmentCalculator.calculateTaskSegments(DefaultLifecycleTaskSegmentCalculator.java:103)
                at org.apache.maven.lifecycle.internal.DefaultLifecycleTaskSegmentCalculator.calculateTaskSegments(DefaultLifecycleTaskSegmentCalculator.java:83)
                at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:85)
                at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)
                at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)
                at org.apache.maven.cli.MavenCli.execute(MavenCli.java:582)
                at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
                at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.lang.reflect.Method.invoke(Method.java:606)
                at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
                at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
                at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
                at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
        Caused by: org.eclipse.aether.resolution.ArtifactDescriptorException: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5
                at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:349)
                at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:231)
                at org.eclipse.aether.internal.impl.DefaultRepositorySystem.readArtifactDescriptor(DefaultRepositorySystem.java:288)
                at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:108)
                ... 23 more
        Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.5 from/to central (https://repo.maven.apache.org/maven2): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
                at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:459)
                at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:262)
                at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:239)
                at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:334)
                ... 26 more
        Caused by: org.eclipse.aether.transfer.ArtifactTransferException: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.5 from/to central (https://repo.maven.apache.org/maven2): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
                at org.eclipse.aether.connector.wagon.WagonRepositoryConnector$6.wrap(WagonRepositoryConnector.java:1016)
                at org.eclipse.aether.connector.wagon.WagonRepositoryConnector$6.wrap(WagonRepositoryConnector.java:1004)
                at org.eclipse.aether.connector.wagon.WagonRepositoryConnector$GetTask.run(WagonRepositoryConnector.java:725)
                at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:67)
                at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
                at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
                at java.lang.Thread.run(Thread.java:744)
        Caused by: org.apache.maven.wagon.TransferFailedException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
                at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.fillInputData(AbstractHttpClientWagon.java:935)
                at org.apache.maven.wagon.StreamWagon.getInputStream(StreamWagon.java:116)
                at org.apache.maven.wagon.StreamWagon.getIfNewer(StreamWagon.java:88)
                at org.apache.maven.wagon.StreamWagon.get(StreamWagon.java:61)
                at org.eclipse.aether.connector.wagon.WagonRepositoryConnector$GetTask.run(WagonRepositoryConnector.java:660)
                ... 4 more
        Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
                at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
                at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1884)
                at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:276)
                at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:270)
                at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1341)
                at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:153)
                at sun.security.ssl.Handshaker.processLoop(Handshaker.java:868)
                at sun.security.ssl.Handshaker.process_record(Handshaker.java:804)
                at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1016)
                at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1312)
                at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1339)
                at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1323)
                at org.apache.maven.wagon.providers.http.httpclient.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:280)
                at org.apache.maven.wagon.providers.http.httpclient.impl.conn.HttpClientConnectionOperator.upgrade(HttpClientConnectionOperator.java:167)
                at org.apache.maven.wagon.providers.http.httpclient.impl.conn.PoolingHttpClientConnectionManager.upgrade(PoolingHttpClientConnectionManager.java:329)
                at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:392)
                at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.MainClientExec.execute(MainClientExec.java:218)
                at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.ProtocolExec.execute(ProtocolExec.java:194)
                at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.RetryExec.execute(RetryExec.java:85)
                at org.apache.maven.wagon.providers.http.httpclient.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
                at org.apache.maven.wagon.providers.http.httpclient.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:186)
                at org.apache.maven.wagon.providers.http.httpclient.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
                at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.execute(AbstractHttpClientWagon.java:756)
                at org.apache.maven.wagon.providers.http.AbstractHttpClientWagon.fillInputData(AbstractHttpClientWagon.java:854)
                ... 8 more
        Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
                at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:385)
                at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
                at sun.security.validator.Validator.validate(Validator.java:260)
                at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)
                at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:231)
                at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)
                at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1323)
                ... 27 more
        Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
                at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:196)
                at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:268)
                at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380)
                ... 33 more



Problems using Maven and SSL behind proxy

Every time I open a Python file PyCharm will hide all imports and shows:

    import ...

within the editor.

I have to manually unfold it to see the imports. Where do I find the setting to undo auto-hiding of `import` statements?

How do I make pyCharm stop hiding (unfold) my Python imports?

I just got set up to use pytest with Python 2.6. It has worked well so far with the exception of handling &quot;import&quot; statements: I can&#39;t seem to get pytest to respond to imports in the same way that my program does.

My directory structure is as follows:
    
    src/
        main.py
        util.py
        test/
            test_util.py
        geom/
            vector.py
            region.py
            test/
                test_vector.py
                test_region.py

To run, I call `python main.py` from src/.

In main.py, I import both vector and region with

    from geom.region import Region
    from geom.vector import Vector

In vector.py, I import region with

    from geom.region import Region

These all work fine when I run the code in a standard run. However, when I call &quot;py.test&quot; from src/, it consistently exits with import errors.

---

## Some Problems and My Solution Attempts ##

My first problem was that, when running &quot;test/test_foo.py&quot;, py.test could not &quot;import foo.py&quot; directly. I solved this by using the &quot;imp&quot; tool. In &quot;test_util.py&quot;:

    import imp
    util = imp.load_source(&quot;util&quot;, &quot;util.py&quot;)

This works great for many files. It also seems to imply that when pytest is running &quot;path/test/test_foo.py&quot; to test &quot;path/foo.py&quot;, it is based in the directory &quot;path&quot;.

However, this fails for &quot;test_vector.py&quot;. Pytest can find and import the `vector` module, but it **cannot** locate any of `vector`&#39;s imports. The following imports (from &quot;vector.py&quot;) both fail when using pytest:

    from geom.region import *
    from region import *

These both give errors of the form

    ImportError: No module named [geom.region / region]

I don&#39;t know what to do next to solve this problem; my understanding of imports in Python is limited.

**What is the proper way to handle imports when using pytest?**

---

## Edit: Extremely Hacky Solution ##

In `vector.py`, I changed the import statement from

    from geom.region import Region

to simply

    from region import Region

This makes the import relative to the directory of &quot;vector.py&quot;.

Next, in &quot;test/test_vector.py&quot;, I add the directory of &quot;vector.py&quot; to the path as follows:

    import sys, os
    sys.path.append(os.path.realpath(os.path.dirname(__file__)+&quot;/..&quot;))

This enables Python to find &quot;../region.py&quot; from &quot;geom/test/test_vector.py&quot;.

This works, but it seems extremely problematic because I am adding a ton of new directories to the path. What I&#39;m looking for is either

1) An import strategy that is compatible with pytest, or

2) An option in pytest that makes it compatible with my import strategy

So I am leaving this question open for answers of these kinds.

Importing correctly with pytest

I am having difficulty in importing a local go file into another go file.

My project structure is like something below

    -samplego
    --pkg
    --src
    ---github.com
    ----xxxx
    -----a.go
    -----b.go
    --bin

I am trying to import a.go inside b.go. I tried the following,

    import &quot;a&quot;
    import &quot;github.com/xxxx/a&quot;

None of these worked..I understand I have to meddle up with GOPATH but I couldn&#39;t get it right. Presently my GOPATH is pointing to samplego(/workspace/samplego).I get the below error

    cannot find package &quot;a&quot; in any of:
    /usr/local/go/src/pkg/a (from $GOROOT)
    /workspace/samplego/src/a (from $GOPATH)

Also, how does GOPATH work when these source files are imported into another project/module? Would the local imports be an issue then? What is the best practice in this case - is it to have just one go file in module(with associated tests)? 



importing go files in same folder

This problem happens intermittently for different libraries and different projects.
When trying to import a library, the package will be recognized, but the class name can&#39;t be resolved.
 
If on the import statement, I `right-click -&gt; Goto -&gt; the package&#39;s declaration`, I see all the decompiled classes displayed in the side pane -- Including the ones I need --
If I try to auto-complete the import statement, I notice the class I need is not featured in the dropdown.
 
I tried invalidating caches already, doesn&#39;t work. I cannot find any class conflicts -- there is no other jar file in my classpath with the same package name.
I am able to import this class into other projects.
 
Please see screen shots:

[![][2]][1]

[![][4]][3]

 
Anyone have a clue?


  [1]: http://i.stack.imgur.com/WwQ5f.png
  [2]: http://i.stack.imgur.com/WwQ5fl.png
  [3]: http://i.stack.imgur.com/6OXn2.png
  [4]: http://i.stack.imgur.com/6OXn2l.png

Intellij Cannot resolve symbol on import

I&#39;ve been reading a tab-delimited data file in Windows with Pandas/Python without any problems. The data file contains notes in first three lines and then follows with a header. 

    df = pd.read_csv(myfile,sep=&#39;\t&#39;,skiprows=(0,1,2),header=(0))

I&#39;m now trying to read this file with my Mac. (My first time using Python on Mac.) I get the following error.

    pandas.parser.CParserError: Error tokenizing data. C error: Expected 1
    fields in line 8, saw 39

If set the *error_bad_lines* argument for *read_csv* to *False*, I get the following information, which continues until the end of the last row.

    Skipping line 8: expected 1 fields, saw 39
    Skipping line 9: expected 1 fields, saw 125
    Skipping line 10: expected 1 fields, saw 125
    Skipping line 11: expected 1 fields, saw 125
    Skipping line 12: expected 1 fields, saw 125
    Skipping line 13: expected 1 fields, saw 125
    Skipping line 14: expected 1 fields, saw 125
    Skipping line 15: expected 1 fields, saw 125
    Skipping line 16: expected 1 fields, saw 125
    Skipping line 17: expected 1 fields, saw 125
    ...

Do I need to specify a value for the *encoding* argument? It seems as though I shouldn&#39;t have to because reading the file works fine on Windows.

Reading tab-delimited file with Pandas - works on Windows, but not on Mac

I am developing a Java application that queries a REST API on a remote server over HTTP. For security reasons this communication should be switched to HTTPS.

Now that [Let&#39;s Encrypt](https://letsencrypt.org/) started their public beta, I&#39;d like to know if Java currently works (or is confirmed to be working in the future) with their certificates by default.

Let&#39;s Encrypt got their intermediate [cross-signed by IdenTrust](https://letsencrypt.org/certificates/#cross-signing), which should be good news. However, I cannot find any of these two in the output of this command:

    keytool -keystore &quot;..\lib\security\cacerts&quot; -storepass changeit -list

I know that trusted CAs can be added manually on each machine, but since my application should be free to download and executable without any further configuration, I am looking for solutions that work &quot;out of the box&quot;. Do you have good news for me?

Does Java support Let&#39;s Encrypt certificates?

I&#39;m trying to make sense of how to upload an app onto Google Play while using Google Play App Signing.

Here is what I did:

 1. Created an app
 2. Used keytool.exe to generate a key for that app
 3. Uploaded the app to Google Play
 4. Enrolled in the Google Play App Signing
 5. Try to upload the app again without success. 

It complains that the certificate is not the certificate

&gt; Upload new APK to Production
&gt; 
&gt; Upload failed
&gt; You uploaded an APK that is not signed with the upload certificate. You must use the same certificate. The upload certificate has fingerprint:
&gt; [ SHA1: 0C:... ]
and the certificate used to sign the APK that you uploaded have fingerprint:
&gt; [ SHA1: 2D:... ]

After searching for a while. I find out how to put the certificated posted on my Google Play console in my keystore. Something like this:

keytool.exe -importcert -file upload.pem -keystore myapp-release-key.keystore

The certificate seems to be in. When I list the contents of the keystore, here&#39;s what I get:

keytool.exe -list -keystore trackcoachfull-release-key.keystore
Enter keystore password:

Keystore type: JKS
Keystore provider: SUN

Your keystore contains 2 entries

myappfull, May 18, 2017, PrivateKeyEntry,
Certificate fingerprint (SHA1): 2D:...
uploadkey, May 19, 2017, trustedCertEntry,
Certificate fingerprint (SHA1): 0C:...

Now, where I&#39;m blocked...

In Android Studio, I try to generate a signed APK with the uploadkey.

Build &gt; Generate Signed APK
Select the keystore above
Enter the keystore password
Select the uploadkey as the key alias
I&#39;m force to enter a key password.

Error in Android Studio:

&gt; Error:Execution failed for task &#39;:app:packageFullRelease&#39;.
&gt; &gt; com.android.ide.common.signing.KeytoolException: Failed to read key uploadkey from store
&gt; &quot;C:\Users\Admin\AndroidStudioProjects\keystores\myappfull-release-key.keystore&quot;:
&gt; trusted certificate entries are not password-protected

My question is this: 

How do you generate an APK signed with an upload key provided by Google Play?

Thanks




Content Type	Original Author	Original Content on Stackoverflow
Question	Arun Kumar	View Question on Stackoverflow
Solution 1 - Java	Arun Kumar	View Answer on Stackoverflow
Solution 2 - Java	Carlos	View Answer on Stackoverflow

Add Self Signed Certificate without promting Yes/No from User

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