Automate PNG & JPG Image Optimization

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Download Source Code

Introduction

If you are a web developer you already know how important to reduce the image size by compressing the image. When you checking the page speed using the tool like “Google PageSpeed Insight” or “Yahoo YSlow”, you can see how much bytes we can save by compressing the image.

Google:Page Speed

Images saved from programs like Fireworks can contain kilobytes of extra comments, and use too many colors, even though a reduction in the color palette may not perceptibly reduce image quality. Improperly optimized images can take up more space than they need to; for users on slow connections, it is especially important to keep image sizes to a minimum.

You should perform both basic and advanced optimization on all images. Basic optimization includes cropping unnecessary space, reducing color depth to the lowest acceptable level, removing image comments, and saving the image to an appropriate format. You can perform basic optimization with any image editing program, such as GIMP.  Advanced optimization involves further (lossless) compression of JPEG and PNG files. You should see a benefit for any image file that can be reduced by 25 bytes or more (less than this will not result in any appreciable performance gain). <Google Inc., 2012. Optimize images  https://developers.google.com/speed/docs/best-practices/payload#CompressImages >

There are some online tools like “Yahoo Smush.it” use lossless compression techniques and reduce file size by removing the unnecessary bytes form the image. But if you want to make it automate, how do you do that? Several standalone tools are available that perform lossless compression on JPEG and PNG files.

For JPG Google recommended using,

  • Jpegtran – available for both windows and Linux and mac
  • Jpegoptim – available only on Linux

For PNG Google recommended using,

Using the code

Here I wrote a windows batch file which recursively search the given folder and optimized the JPEG and PNG files.

  1. Download jpegtran, OptPNG and PNGOUT executable files. (Or download attached zip file all the necessary files already included)
  2. Create a folder “ImageOptimization” in your C:\ Drive. (You can change those name and folder location by editing the batch file content) and put above downloaded utility files there.
  3. Create a batch file “optimize.bat” within the folder and copy following code into it
    @echo none
    REM Optimizing JPEG with jpegtran
    forfiles /p %1 /s /m "*.jpg" /c "cmd /c  echo processing @path && D:\ImageOptimization\jpegtran.exe -optimize -progressive -copy none -outfile @path @path"
    REM Optimizing PNG with pngout
    forfiles /p %1 /s /m "*.png" /c "cmd /c  echo processing @path && D:\ImageOptimization\pngout.exe @path"
    REM Optimizing PNG with optipng
    rem forfiles /p %1 /s /m "*.png" /c "cmd /c  echo processing @path && D:\ImageOptimization\optipng.exe -force -o7 @path"
    pause
    

    Although I included both PNGOUT and OPTPNG in the script you no need to use both.

  4. Finally you can execute the bat file by passing the image folder you wish to optimize
    optimize.bat “D:\image”

How it works

  • forfiles command – Select a file (or set of files) and execute a command on each file (Batch processing) Refer: http://ss64.com/nt/forfiles.html
  • %1 – accept the folder as a parameter. In above example this will equal to “D:\Image”

forfiles command find all the images in the given directory (recursively) and execute the optimizing executable by passing the image as a parameter to them (@path).

Try

  1. You can further improve by adding this batch command as a context menu command
    http://msdn.microsoft.com/en-us/library/windows/desktop/cc144169(v=vs.85).aspx
  2. Or even you can use a scheduler (e.g. Windows scheduler) to find the daily updated file and optimize them by slightly modifying the forfiles command with “/d” option.

SMTP, POP3 and IMAP

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SMTP, POP3 and IMAP are TCP/IP protocols used for mail delivery. Email clients use POP3 and IMAP protocol to retrieve email from the server (incoming mail) over TCP/IP connection. Outgoing mail for both POP and IMAP clients uses the SMTP. Main difference between POP3 and IMAP is,

  • POP3 – Downloads email locally
  • IMAP – Mail is stored on the mail server

SMTP

Simple Mail Transfer Protocol (SMTP) servers handle the sending of your e mail messages to the Internet. The SMTP server handles outgoing e mail, and is used in conjunction with a POP3 or IMAP incoming e mail server.

POP3

Post Office Protocol 3 (POP3) servers hold incoming e mail messages until you check your e mail, at which point they’re transferred to your computer. POP3 is the most common account type for personal e mail. Messages are typically deleted from the server when you check your e mail.

IMAP

Internet Message Access Protocol (IMAP) servers let you work with e mail messages without downloading them to your computer first. You can preview, delete, and organize messages directly on the e mail server, and copies are stored on the server until you choose to delete them. IMAP is commonly used for business e mail accounts.

Default Ports

  • SMTP AUTH: Port 25 or 587 (some ISPs are blocking port 25)
  • SMTP StartTLS Port 587
  • SMTP SSL Port 465
  • POP Port 110
  • POP SSL Port 995
  • IMAP Port 143
  • IMAP SSL Port 993
  • IMAP StartTLS Port 143

The following list of SMTP, POP3, and IMAP server should help you if you don’t know what mail server you should use for your mail account.

  SMTP POP3 IMAP
Gmail smtp.gmail.com pop.gmail.com imap.gmail.com
  SSL Port 465 SSL Port 995 SSL Port 993
  StartTLS Port 587
TLS/SSL encryption required: yes
Please make sure, that POP3 access is enabled in the account settings. Login to your account and enable POP3. Please make sure, that IMAP access is enabled in the account settings. Login to your account and enable IMAP.
Outlook.com smtp.live.com pop3.live.com imap.mail.yahoo.com
  StartTLS Port 587 SSL Port 995 SSL Port 993
  TLS/SSL encryption required: yes TLS/SSL encryption required: yes  
Yahoo Mail smtp.mail.yahoo.com pop.mail.yahoo.com  
  SSL Port 465 SSL Port 995  
Yahoo Mail Plus plus.smtp.mail.yahoo.com plus.pop.mail.yahoo.com plus.imap.mail.yahoo.com
  SSL Port 465 SSL Port 995 SSL Port 993
Yahoo UK smtp.mail.yahoo.co.uk pop.mail.yahoo.co.uk imap.mail.yahoo.co.uk
  SSL Port 465 SSL Port 995 SSL Port 993
Yahoo Deutschland smtp.mail.yahoo.de pop.mail.yahoo.de imap.mail.yahoo.de
  SSL Port 465 SSL Port 995 SSL Port 993
Yahoo AU/NZ smtp.mail.yahoo.com.au pop.mail.yahoo.com.au imap.mail.yahoo.com.au
  SSL Port 465 SSL Port 995 SSL Port 993
Windows Live (Hotmail) smtp.live.com pop3.live.com  
  StartTLS Port 587 SSL Port 995  

JavaScript Frameworks and Resources

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Knockout.js

Knockout is a JavaScript library that helps you to create rich, responsive display and editor user interfaces with a clean underlying data model. Any time you have sections of UI that update dynamically (e.g., changing depending on the user’s actions or when an external data source changes), KO can help you implement it more simply and maintainably.
http://knockoutjs.com/
Knockout.js

Angular.js

AngularJS is an open-source JavaScript framework, maintained by Google, that assists with running what are known as single-page applications. Its goal is to augment browser-based applications with model–view–controller (MVC) capability, in an effort to make both development and testing easier. The library reads in HTML that contains additional custom tag attributes; it then obeys the directives in those custom attributes, and binds input or output parts of the page to a model represented by standard JavaScript variables. The values of those JavaScript variables can be manually set, or retrieved from static or dynamic JSON resources.
http://angularjs.org/
Angular.js

Backbone.js

Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface.
http://backbonejs.org
Backbone.js

Node.js

Node.js is a platform built on Chrome’s JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.
http://nodejs.org/
Node.js

Modernizr

Modernizr is a small JavaScript library that detects the availability of native implementations for next-generation web technologies, i.e. features that stem from the HTML5 and CSS3 specifications. Many of these features are already implemented in at least one major browser (most of them in two or more), and what Modernizr does is, very simply, tell you whether the current browser has this feature natively implemented or not.
http://modernizr.com
Modernizr

Require.js

RequireJS is a JavaScript file and module loader. It is optimized for in-browser use, but it can be used in other JavaScript environments, like Rhino and Node. Using a modular script loader like RequireJS will improve the speed and quality of your code.
http://requirejs.org
Require.js

Less

LESS extends CSS with dynamic behavior such as variables, mixins, operations and functions.LESS runs on both the server-side (with Node.js and Rhino) or client-side (modern browsers only).
http://lesscss.org/
Less

Sass

Sass is an extension of CSS3, adding nested rules, variables, mixins, selector inheritance, and more. It’s translated to well-formatted, standard CSS using the command line tool or a web-framework plugin.
http://sass-lang.com
Saas

HTML5 Cheat Sheet

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HTML5 Cheat Sheet – Tags

HTML5 Cheat Sheet - Tags

HTML5 Cheat Sheet By InMotion Hosting – A Virtual Private Servers Provider

HTML5 Cheat Sheet – Event Handler Attributes

HTML5 Cheat Sheet - Event Handler Attributes

HTML5 Cheat Sheet By InMotion Hosting – A Web Hosting Provider

HTML5 Cheat Sheet – Browser Support

HTML5 Cheat Sheet - Browser Support

HTML5 Cheat Sheet By InMotion Hosting – A Dedicated Server Provider

Online tools for troubleshooting web, SQL, XML and JSON

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Have you ever wanted to troubleshoot someone else web page which contains the combination of JavaScript, CSS and HTML? Have you ever wanted to troubleshoot someone else SQL query without entering to the SQL server? Here are some useful online tool which make your life easier.

Following tools provide an online debugging environment for HTML, CSS and JavaScript.

1. jsFiddle

jsFiddle is the most popular JavaScript sandbox. It provides instantly ready coding environment for you to begin experimenting in as soon as the page loads.

http://jsfiddle.net/

JS Fiddle

2. JS Bin

JS Bin is another JavaScript sandbox. The design of this app is quite minimal and really allows you to focus on the code. By default, the page only shows the HTML and lives preview panes, but you can easily add JavaScript to that as well.

http://jsbin.com/

JS Bin

3. CSSDesk

CSSDesk is a CSS sandbox which allows you to put your HTML and CSS codes there and view the preview instantly. It is very useful for testing out codes before implementing them in your website permanently.

http://cssdesk.com/

CSS Desk

4. CodePen

CodePen is an app for sharing and playing around with front end code. It’s a site for building stuff from HTML, CSS and JavaScript.

http://codepen.io/pen/

Code Pen

Following tool can use for easy online testing and sharing of database problems and solutions.

1. SQL Fiddle

SQL Fiddle is a tool for easy online testing and sharing of database problems and their solutions. If you do not know SQL or basic database concepts, this site is not going to be very useful to you. However, if you are a database developer, there are a few different use-cases of SQL Fiddle intended for you:

  • You want help with a tricky query, and you’d like to post a question to a Q/A site
  • You want to compare and contrast SQL statements in different database back-ends
  • You do not have a particular database platform readily available, but you would like to see what a given query would look like in that environment

http://sqlfiddle.com/

SQL Fiddle

Following tools act as sandbox environment for JSON,  XML development, including (E)XSLT, XML validation (DTD, schema, RelaxNG) and XQuery.

1. XMLPlayground

XMLPlayground is a sandbox environment for XML development, including (E)XSLT, XML validation (DTD, schema, RelaxNG) and XQuery. It has five development panels into which you can either insert or upload code:

  • XML – your source XML. You can render it as a node tree via the ‘tree’ tab.
  • (E)XSLT – transform your XML with XSLT (1.0). EXSLT an XSL includes are supported.
  • Validation – validate your XML with Schema, DTD or RelaxNG.
  • CSS – style your output
  • XQuery – query or transform your XML with XQuery code (via XQIB)

http://xmlplayground.com/

XML Playground

2. JSON Fiddle

With JSON Fiddle, simulating and posting JSON in Fiddler is just as easy.

http://jsonfiddle.net

json fiddle

Adding styles dynamically to ASP.NET page header

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Recently when I was working on the ASP.NET web site I wanted to modify the page styles dynamically. I googled and found that there are various technique out there for this. In this Article, I wish to share those techniques with.

Following are some of the techniques out there to accomplish this.

1. By using Page.header.Controls.Add()

Page.Header property gets the document header of the page if the head element is defend with “runat=server”  tag in the page declaration.The Header property gets a reference to an HtmlHead object that you can use to set document header information for the page. The HtmlHeadallows you to add information such as style sheets, style rules, a title, and metadata to the head element.

http://msdn.microsoft.com/en-us/library/system.web.ui.page.header.aspx

By using a literal control you can include the CSS file or even a style set.

Literal cssFile = new Literal()
{
    Text = @"<link href=""" + Page.ResolveUrl(styleFilePath) + @""" type=""text/css"" rel=""stylesheet""/>"
};
Page.Header.Controls.Add(cssFile);
Page.Header.Controls.Add(
new LiteralControl(
@"<style type='text/css'>
        .myCssClass
        {
background: black;
border: 1px solid;
        }
</style>
    "
));

Or HtmlGenericControl can use to add the styles file

//// Insert css file to header
HtmlGenericControl oCSS = oCSS = newHtmlGenericControl();
oCSS.TagName = "link";
oCSS.Attributes.Add("href", "css/mystyle.css");
oCSS.Attributes.Add("rel", "stylesheet");
oCSS.Attributes.Add("type", "text/css");
this.Page.Header.Controls.Add(oCSS);

2.  Page.Header.Stylesheet

More elegant technique is use of the Page.Header.Stylesheet Instead of using the string to defend styles (like above with Literal) you can use the style properties to create this.

//// Create dynamic style rule which applies to the css class selector (“.MyCssClass”)
Style dynamicClassStyle = new Style();
dynamicClassStyle.BorderStyle = BorderStyle.Solid;
dynamicClassStyle.BorderColor = System.Drawing.Color.Black;
dynamicClassStyle.BorderWidth = new Unit(1);
dynamicClassStyle.BackColor = System.Drawing.Color.White;
Page.Header.StyleSheet.CreateStyleRule(dynamicClassStyle, null, ".MyCssClass");
//// Create dynamic style rule which applies to type selector ("DIV")
Style dynamicTypeStyle = new Style();
dynamicTypeStyle.BorderStyle = BorderStyle.Solid;
dynamicTypeStyle.BorderColor = System.Drawing.Color.Black;
dynamicTypeStyle.BorderWidth = new Unit(1);
dynamicTypeStyle.BackColor = System.Drawing.Color.White;
Page.Header.StyleSheet.CreateStyleRule(dynamicTypeStyle, null, "DIV");

For more information please refer
http://msdn.microsoft.com/en-us/library/system.web.ui.istylesheet.createstylerule.aspx

With whatever the technique you follow please remember the following hints also,

Adding styles programmatically using the methods of the IStyleSheet interface during asynchronous postbacks is not supported. When you add AJAX capabilities to a Web page, asynchronous postbacks update regions of the page without updating the whole page.