Found the answer in an [amazon aws forum][1].


    return s3Client.putObject(
       new PutObjectRequest(bucketName, objectKey, inputStream, metadata)
          .withCannedAcl(CannedAccessControlList.PublicRead));

The answer being

`.withCannedAcl(CannedAccessControlList.PublicRead)`


  [1]: https://forums.aws.amazon.com/thread.jspa?messageID=190170

An alternative approach which allows for more finegrained control of who exactly is allowed to view the object (all users or authenticated users only):

        PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, keyName, image);
        AccessControlList acl = new AccessControlList();
        acl.grantPermission(GroupGrantee.AllUsers, Permission.Read); //all users or authenticated
        putObjectRequest.setAccessControlList(acl);
        s3client.putObject(putObjectRequest);

    s3client.setObjectAcl(&quot;bucketName[/subDirectory]&quot;, fileName, CannedAccessControlList.PublicRead);
    URL url = s3client.getUrl(&quot;bucketName[/subDirectory]&quot;, fileName);
    String sharableLink = url.toExternalForm();

[source][1]


  [1]: https://forums.aws.amazon.com/thread.jspa?messageID=190170

Having a strong background in Java/C++ i wonder if it is possible to develop a somewhat larger JavaScript application without having to cut back on quality.

Any hints are appreciated regarding:

- Development Enviroment
- Debugging Techniques
- Unit Testing
- Profiling
- Instrumentation
- System Design
- Interface Design
- Code Design

I&#39;m also curious how projects like [JavaScript PC Emulator][1] and [JavaScript Game Engine][2] handled those issues in case some of you know.

  [1]: http://bellard.org/jslinux/
  [2]: http://impactjs.com/

Best practices for developing larger JavaScript applications

I&#39;d like to execute a query from the shell (not in the interactive psql client) and have it print the CSV or TSV representation of the output to STDOUT. How do you do that with `psql` or one of the PostgreSQL command-line tools?

How do you print the result of a PostgreSQL query in CSV or TSV format from the command line?

How do you make an S3 object public via the AWS Java SDK?

Specifically, what API methods via the Java AWS SDK can be used to make an Object public when its uploaded?


How do you make an S3 object public via the aws Java SDK?

<p>How do you make an S3 object public via the AWS Java SDK?</p>
<p>Specifically, what API methods via the Java AWS SDK can be used to make an Object public when its uploaded?</p>


I&#39;m looking for the fastest way to get pixel data (int the form `int[][]`) from a [`BufferedImage`][1]. My goal is to be able to address pixel `(x, y)` from the image using `int[x][y]`. All the methods I have found do not do this (most of them return `int[]`s).


  [1]: http://download.oracle.com/javase/6/docs/api/java/awt/image/BufferedImage.html

Java - get pixel array from image

In my program I&#39;m reading integers form console many times. Every time, I need to type this line.

    new Scanner(System.in).nextInt(); 

I&#39;m used to C/C++ and I&#39;m wondering if I can define something like

    #define READINT Scanner(System.in).nextInt(); 

and then, in every place in my java program I can read form console as 

    int a = new READINT;


But I read form books Java does not support macros. 

Someone please explain me why is it so, and can I do this in  any other way.

Can I have macros in Java source files

I have a java complied package to speak with the https server on net. Running the compilation gives the following exception:

    javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
        at com.sun.net.ssl.internal.ssl.InputRecord.handleUnknownRecord(Unknown Source)
    at com.sun.net.ssl.internal.ssl.InputRecord.read(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)

I think this is due to the connection established with the client machine is not secure.  Is there any way to configure the local machine or ports in order to connect to the remote https server?




Unrecognized SSL message, plaintext connection? Exception

I need a way to break from the middle of try/catch block without throwing an exception.
Something that is similar to the break and continue in for loops.
Is this possible?

I have been getting weird throughts about throwing a custom exception (naming it &quot;BreakContinueException&quot;) that simple does nothing in its catch handler. I&#39;m sure this is very twisted.

So, any straight forward solution I&#39;m not aware of?

How can I break from a try/catch block without throwing an exception in Java

I have an `ArrayList` `l1` of size 10. I assign `l1` to new list reference type `l2`. Will `l1` and `l2` point to same `ArrayList` object? Or is a copy of the `ArrayList` object assigned to `l2`?

When using the `l2` reference, if I update the list object, it reflects the changes in the `l1` reference type also.

For example: 

    List&lt;Integer&gt; l1 = new ArrayList&lt;Integer&gt;();
    for (int i = 1; i &lt;= 10; i++) {
        l1.add(i);
    }

    List l2 = l1;
    l2.clear();

Is there no other way to assign a copy of a list object to a new reference variable, apart from creating 2 list objects, and doing copy on collections from old to new?

Java ArrayList copy

I&#39;m working on building a RESTful API for one of the applications I maintain. We&#39;re currently looking to build various things into it that require more controlled access and security. While researching how to go about securing the API, I found a few different opinions on what form to use. I&#39;ve seen some resources say HTTP-Auth is the way to go, while others prefer API keys, and even others (including the questions I found here on SO) swear by OAuth. 

Then, of course, the ones that prefer, say, API keys, say that OAuth is designed for applications getting access on behalf of a user (as I understand it, such as signing into a non-Facebook site using your Facebook account), and not for a user directly accessing resources on a site they&#39;ve specifically signed up for (such as the official Twitter client accessing the Twitter servers). However, the recommendations for OAuth seem to be even for the most basic of authentication needs.

My question, then, is - assuming it&#39;s all done over HTTPS, what are some of the practical differences between the three? When should one be considered over the others?

API Keys vs HTTP Authentication vs OAuth in a RESTful API

Is there an easy way to grab a users LinkedIn profile photo?

Ideally similar to how you would with Facebook - http://graph.facebook.com/userid/picture


Getting LinkedIn Profile Picture

I would like for a user within my ruby on rails app to be able to submit a ticket to my external ticket management system, squishlist.com. They have an api and instructions as follows. You need to authenticate and get a token and then submit the ticket with the token. From squishlist. 

    # get the token
    
    https://api.squishlist.com/auth/?cfg=testcorp&amp;user_key=privatekey&amp;api_key=TEST-KEY-12345
      =&gt; {&quot;token&quot;: &quot;authtoken&quot;,
          &quot;expires&quot;: &quot;2010-06-16 13:31:56&quot;}
    
    # and then the ticket with the token
    
    https://api.squishlist.com/rest/?cfg=testcorp&amp;token=authtoken&amp;method=squish.issue.submit&amp;prj=demo
      POST data: {&#39;issue_type&#39;: 1, &#39;subject&#39;: &#39;Hello, world.&#39;, 4: &#39;Open&#39;, 5: 10}

For testing purposes, I created a controller, route and view (page) for testing. On my controller I have the following 


    require &#39;httparty&#39;
    require &#39;json&#39;
    
    class SubmitticketController &lt; ApplicationController

    	def submit_a_ticket
    		
    		@cfg = &#39;xxxsupport&#39;
    		@user_key = &#39;4787fsdbbfbfsdbhbfad5aba91129a3f1ed1b743321f7b&#39;
    		@api_key = &#39;MrUser411&#39;
    		@project = &#39;excelm-manoke&#39;
    		@url_new_string = &#39;https://api.squishlist.com/auth/?cfg=&#39;+@cfg+&#39;&amp;user_key=&#39;+@user_key+&#39;&amp;api_key=&#39;+@api_key
    		# https://api.squishlist.com/auth/?cfg=xxxsupport&amp;user_key=4787fsdbbfbfsdbhbfad5aba91129a3f1ed1b743321f7b&amp;api_key=MrUser411  - this is what is created by @url_new_string
    		response =  HTTParty.get(@url_new_string.to_str)  #submit the string to get the token
    		@parsed_and_a_hash = JSON.parse(response)
    		@token = @parsed_and_a_hash[&quot;token&quot;]
    		

    		#make a new string with the token

    		@urlstring_to_post = &#39;https://api.squishlist.com/rest/?cfg=&#39;+@cfg+&#39;&amp;token=&#39;+@token+&#39;&amp;method=squish.issue.submit&amp;prj=&#39;+@project

    		#submit and get a result
    		
    		@result = HTTParty.post(@urlstring_to_post.to_str, :body =&gt; {:subject =&gt; &#39;This is the screen name&#39;, :issue_type =&gt; &#39;Application Problem&#39;, :status =&gt; &#39;Open&#39;, :priority =&gt; &#39;Normal&#39;, :description =&gt; &#39;This is the description for the problem&#39;})
    		
    	end
    
    end

And then I have a page that I go to to see the result of the controllers actions and it has the following code. 

    &lt;p&gt;&lt;%= @result %&gt;&lt;/p&gt;

I know that it is working in general because of responses I have received along the way. My json is different from the example because of fields I have defined in squishlist. Can anyone help me out on this issue? 

I guess the real problem is that I can&#39;t really see what the json looks like and if it is even close to match. I really don&#39;t know much about json. Should I be using something that might be easy. Should I be using ajax to submit this. Any help is greatly appreciated. I love the community here. 




POST JSON to API using Rails and HTTParty

I want to share some information in Google+ wall from my application.
For that I go through the [Google+ API][1]. In that API they are mentioning how to get access token of a particular user, but they do not mention how to post in users wall using the access token.


  [1]: https://developers.google.com/+/

How to post in Google+ wall

I am working on a site that has a ton of embedded youtube videos, the client wants to show a popup whenever a video stops splaying.

I looked at the youtube api and there seems to be a way to detect when a video ends:

http://code.google.com/apis/youtube/js_api_reference.html

but I can&#39;t embed the videos like they mentioned on that page since the videos are all already on the site (thousands that have been added manually by pasting embed code).

Is there a way to detect the ending of these videos without changing any of the existing videos (using javascript)?

How to detect when a youtube video finishes playing?

I&#39;ve used Amazon S3 a little bit for backups for some time. Usually, after I upload a file I check the MD5 sum matches to ensure I&#39;ve made a good backup. S3 has the &quot;etag&quot; header which used to give this sum.

However, when I uploaded a large file recently the Etag no longer seems to be a md5 sum. It has extra digits and a hyphen &quot;696df35ad1161afbeb6ea667e5dd5dab-2861&quot; . I can&#39;t find any documentation about this changing. I&#39;ve checked using the S3 management console and with Cyberduck.

I can&#39;t find any documentation about this change. Any pointers?

Etag definition changed in Amazon S3

I have a simple bucket that looks like `images.mysite.com` on my S3 and other buckets containing backups, etc.

I want to allow a specific user to be able to access the `images.mysite.com` bucket in order to upload images. However, I DO NOT want him to see any of the other buckets; not even that they exist.

I could not make a policy that does this; every time I try something restrictive, it ends up blocking the listing of any buckets.

Is there an S3 policy for limiting access to only see/access one bucket?

Maybe I&#39;m blind but i can&#39;t find, in S3 documentation, the maximum file name length that can be uploaded in S3.

What is the maximum length of a filename in S3

I&#39;m building app on top of Amazon S3. How can I keep my S3 running under a set budget? Suppose I don&#39;t want unexpected traffic to over charge my AWS account. I&#39;d rather it remain unavailable.

Is there a way to set Amazon AWS billing limit?

Does anyone know how to do this? So far I haven&#39;t been able to find anything useful via Google.

I&#39;d really like to setup a local repo and use `git push` to publish it to S3, the idea being to have local version control over assets but remote storage on S3.

Can this be done, and if so, how?

Publish to S3 using Git?

I have an EC2 instance running (FreeBSD 9 AMI ami-8cce3fe5), and I can ssh into it using my amazon-created key file without password prompt, no problem.

However, when I want to copy a file to the instance using scp I am asked to enter a password:

    scp somefile.txt -i mykey.pem root@my.ec2.id.amazonaws.com:/
    
    Password:

Any ideas why this is happening/how it can be prevented?

scp (secure copy) to ec2 instance without password

I am trying to set up FTP on Amazon Cloud Server, but without luck.
I search over net and there is no concrete steps how to do it.

I found those commands to run:

    $ yum install vsftpd
    $ ec2-authorize default -p 20-21
    $ ec2-authorize default -p 1024-1048
    $ vi /etc/vsftpd/vsftpd.conf
    #&lt;em&gt;---Add following lines at the end of file---&lt;/em&gt;
    	pasv_enable=YES
    	pasv_min_port=1024
    	pasv_max_port=1048
    	pasv_address=&lt;Public IP of your instance&gt;
    $ /etc/init.d/vsftpd restart


But I don&#39;t know where to write them.

Setting up FTP on Amazon Cloud Server

I am able to issue commands to my EC2 instances via SSH and these commands logs answers which I&#39;m supposed to keep watching for a long time. The bad thing is that SSH command is closed after some time due to my inactivity and I&#39;m no longer able to see what&#39;s going on with my instances.

How can I disable/increase timeout in Amazon Linux machines?

The error looks like this:

    Read from remote host ec2-50-17-48-222.compute-1.amazonaws.com: Connection reset by peer

Content Type	Original Author	Original Content on Stackoverflow
Question	MikeNereson	View Question on Stackoverflow
Solution 1 - Java	MikeNereson	View Answer on Stackoverflow
Solution 2 - Java	Maurice	View Answer on Stackoverflow
Solution 3 - Java	Rajat	View Answer on Stackoverflow

How do you make an S3 object public via the aws Java SDK?

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Solution 3 - Java

How do you print the result of a PostgreSQL query in CSV or TSV format from the command line?

Best practices for developing larger JavaScript applications

Attributions