Sagar Ganatra's Blog

The XmlHttpRequest Level 2 specification adds several enhancements to the XmlHttpRequest object. Last week I had blogged about cross-origin-requests and how it is different from Flash\Silverlight's approach .  With Level 2 specification one can upload the file to the server by passing the file object to the send method. In this post I'll try to explore uploading file using XmlHttpRequest 2 in conjunction with the progress events. I'll also provide a description on the new HTML5 tag -  progress which can be updated while the file is being uploaded to the server. And of course, some ColdFusion code that will show how the file is accepted and stored on the server directory.

A few days back I had posted on XmlHttpRequest Level 2 , describing how cross-origin requests can be achieved. A few folks on my team asked me how different it is from Flash\Silverlight's approach to achieve cross domain request\response with crossdomain.xml . The approach that these plugins take to send a request and receive a response is completely different from that of XmlHttpRequest's approach.

HTML5 specification has introduced a few enhancements for XmlHttpRequest object and one of them is the ability to make cross-origin request. That is, a host can send a XmlHttpRequest request to another host and receive a response in return. On the server-side, a check can be made to see whether the request can be accepted from the given origin. In this post I'll try to explain how this can be done using ColdFusion. Client side: On the client side, a XmlHttpRequest object is created and then a GET request is made to the remote server. var client = new XMLHttpRequest(); client.onreadystatechange = readyStateChangeHandler; client.open("GET","http://{remote-address}/{path-to-file}.cfm",true); client.send(); For example, say example.com wants to get a response from another domain say abc.com , then as observed from the above code the request would look like: client.open("GET","http://abc.com/dir1/foo.cfm",true); Serve...

Do you spend a lot of  time scrolling large files, just to find out the next function definition in place or to figure out the end\start of a tag? If your answer is YES, then why don’t you try the Navigation enhancements in ColdFusion Builder 2.0? ColdFusion Builder comes to you with three types of Navigation enhancements: -          Code Navigation -          Smart Tab Navigation -          Jumping to matching tag. Code Navigation Code Navigation is all about navigating to the next function definition in place. Imagine a CFC containing various cffunction tags. It is a time-consuming task to keep scrolling and keep an eye on the file to get to the next cffunction tag. ColdFusion Builder 2.0 provides a shortcut key CTRL + SHIFT + DOWN to navigate to the next function definition. And to navigate to the previous function definition, you can use the shortcut CTRL +...

Tag search is that one powerful feature in ColdFusion Builder 2.0 which allows you to search for tags that match some criteria. Also, there are various actions that the user can perform once the tag is found. Actions such as  'Replacing the tag block' with some text,  'Removing the Tag block',   'Setting an attribute',   'Removing an attribute',  'Adding text before the tag block' and  'Adding text after the tag block'.  In this post I'll explain how these actions can help you increase your productivity in your day to day application development. Action - Setting an attribute Consider a use-case where you would like your ColdFusion application to be available to other web clients such as a HTML client or a FLEX client. In these cases you will have to update the cffunction's  access attribute to remote.  Updating each and every function definition can be a time consuming task. With the action Set attribute  one can specify the attr...