|By Steve Bryant||
|October 4, 2002 12:00 AM EDT||
What's worse is that the person responsible for maintaining the site doesn't even know that the error occurred.
One of the most common ways to trap errors in troublesome ColdFusion code is to wrap a <cftry>/<cfcatch> block around it. If you're not using this method, you really should look into it. Part 4 of Charlie Arehart's series (June 2002) dealt with this topic.
Enter the "onerror" Property
Bringing ColdFusion into the Picture
Certainly you've gotten information from the browser to ColdFusion before, but for this technique to work smoothly, we must do it in such a way that we don't distract from the user's experience. Notice that no other window is opened, and that our current page is not forced to refresh (which would likely cause the error to recur and put the user in an infinite loop). Any of that could interfere with the user's experience. So how do we do it?
This would cause a problem if you actually tried to display the image, but we have no need to do that. We're just sending information to a ColdFusion page. The image is simply our way to do it without forcing the user to leave the page. This is the only way I know of that this can be done in HTML, that is consistent across browsers, and that doesn't distract from the user's experience.
Once we know this, everything else is just an extension of what we've learned so far. The technique could have other uses as well. For example, you could pull a ColdFusion page that's using <CFCONTENT> to make the page output its contents as a .gif or .jpg instead of HTML. This would allow server-side processing to be used to choose an image without the user having to experience a page reload. While I haven't seen any practical uses for this yet, I'm hoping this suggestion will whet enough appetites that I might hear ideas from others.
Now all you have to do is pass on the variables that were passed to your error handler script to your ColdFusion page as follows:
errImage = new Image();
errImage.src = 'JSErrs.cfm?url=' + escape(errUrl)
+ '&msg=' + escape(msg) + '&line=' + line;
|10/17/02 03:31:00 PM EDT|
NHK, Japan Broadcasting, will feature the upcoming @ThingsExpo Silicon Valley in a special 'Internet of Things' and smart technology documentary that will be filmed on the expo floor between November 3 to 5, 2015, in Santa Clara. NHK is the sole public TV network in Japan equivalent to the BBC in the UK and the largest in Asia with many award-winning science and technology programs. Japanese TV is producing a documentary about IoT and Smart technology and will be covering @ThingsExpo Silicon Valley. The program, to be aired during the peak viewership season of the year, will have a major impac...
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The buzz continues for cloud, data analytics and the Internet of Things (IoT) and their collective impact across all industries. But a new conversation is emerging - how do companies use industry disruption and technology enablers to lead in markets undergoing change, uncertainty and ambiguity? Organizations of all sizes need to evolve and transform, often under massive pressure, as industry lines blur and merge and traditional business models are assaulted and turned upside down. In this new data-driven world, marketplaces reign supreme while interoperability, APIs and applications deliver un...
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Oct. 7, 2015 04:00 PM EDT Reads: 204
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Oct. 7, 2015 04:00 PM EDT Reads: 2,131
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Oct. 7, 2015 04:00 PM EDT Reads: 1,066
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Oct. 7, 2015 03:30 PM EDT Reads: 7,417
WebRTC is about the data channel as much as about video and audio conferencing. However, basically all commercial WebRTC applications have been built with a focus on audio and video. The handling of “data” has been limited to text chat and file download – all other data sharing seems to end with screensharing. What is holding back a more intensive use of peer-to-peer data? In her session at @ThingsExpo, Dr Silvia Pfeiffer, WebRTC Applications Team Lead at National ICT Australia, will look at different existing uses of peer-to-peer data sharing and how it can become useful in a live session to...
Oct. 7, 2015 03:30 PM EDT Reads: 555
SYS-CON Events announced today that Luxoft Holding, Inc., a leading provider of software development services and innovative IT solutions, has been named “Bronze Sponsor” of SYS-CON's @ThingsExpo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Luxoft’s software development services consist of core and mission-critical custom software development and support, product engineering and testing, and technology consulting.
Oct. 7, 2015 03:15 PM EDT Reads: 610
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Oct. 7, 2015 03:00 PM EDT Reads: 6,902
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Oct. 7, 2015 02:00 PM EDT Reads: 5,848
You have your devices and your data, but what about the rest of your Internet of Things story? Two popular classes of technologies that nicely handle the Big Data analytics for Internet of Things are Apache Hadoop and NoSQL. Hadoop is designed for parallelizing analytical work across many servers and is ideal for the massive data volumes you create with IoT devices. NoSQL databases such as Apache HBase are ideal for storing and retrieving IoT data as “time series data.”
Oct. 7, 2015 01:45 PM EDT Reads: 482
There are so many tools and techniques for data analytics that even for a data scientist the choices, possible systems, and even the types of data can be daunting. In his session at @ThingsExpo, Chris Harrold, Global CTO for Big Data Solutions for EMC Corporation, will show how to perform a simple, but meaningful analysis of social sentiment data using freely available tools that take only minutes to download and install. Participants will get the download information, scripts, and complete end-to-end walkthrough of the analysis from start to finish. Participants will also be given the pract...
Oct. 7, 2015 01:45 PM EDT Reads: 111
Clearly the way forward is to move to cloud be it bare metal, VMs or containers. One aspect of the current public clouds that is slowing this cloud migration is cloud lock-in. Every cloud vendor is trying to make it very difficult to move out once a customer has chosen their cloud. In his session at 17th Cloud Expo, Naveen Nimmu, CEO of Clouber, Inc., will advocate that making the inter-cloud migration as simple as changing airlines would help the entire industry to quickly adopt the cloud without worrying about any lock-in fears. In fact by having standard APIs for IaaS would help PaaS expl...
Oct. 7, 2015 01:30 PM EDT Reads: 611
SYS-CON Events announced today that ProfitBricks, the provider of painless cloud infrastructure, will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. ProfitBricks is the IaaS provider that offers a painless cloud experience for all IT users, with no learning curve. ProfitBricks boasts flexible cloud servers and networking, an integrated Data Center Designer tool for visual control over the cloud and the best price/performance value available. ProfitBricks was named one of the coolest Clo...
Oct. 7, 2015 01:00 PM EDT Reads: 751
Organizations already struggle with the simple collection of data resulting from the proliferation of IoT, lacking the right infrastructure to manage it. They can't only rely on the cloud to collect and utilize this data because many applications still require dedicated infrastructure for security, redundancy, performance, etc. In his session at 17th Cloud Expo, Emil Sayegh, CEO of Codero Hosting, will discuss how in order to resolve the inherent issues, companies need to combine dedicated and cloud solutions through hybrid hosting – a sustainable solution for the data required to manage I...
Oct. 7, 2015 01:00 PM EDT Reads: 457
Mobile messaging has been a popular communication channel for more than 20 years. Finnish engineer Matti Makkonen invented the idea for SMS (Short Message Service) in 1984, making his vision a reality on December 3, 1992 by sending the first message ("Happy Christmas") from a PC to a cell phone. Since then, the technology has evolved immensely, from both a technology standpoint, and in our everyday uses for it. Originally used for person-to-person (P2P) communication, i.e., Sally sends a text message to Betty – mobile messaging now offers tremendous value to businesses for customer and empl...
Oct. 7, 2015 12:15 PM EDT Reads: 196
Scott Guthrie's keynote presentation "Journey to the intelligent cloud" is a must view video. This is from AzureCon 2015, September 29, 2015 I have reproduced some screen shots in case you are unable to view this long video for one reason or another. One of the highlights is 3 datacenters coming on line in India.
Oct. 7, 2015 12:00 PM EDT Reads: 259
Nowadays, a large number of sensors and devices are connected to the network. Leading-edge IoT technologies integrate various types of sensor data to create a new value for several business decision scenarios. The transparent cloud is a model of a new IoT emergence service platform. Many service providers store and access various types of sensor data in order to create and find out new business values by integrating such data.
Oct. 7, 2015 12:00 PM EDT Reads: 471
SYS-CON Events announced today that IBM Cloud Data Services has been named “Bronze Sponsor” of SYS-CON's 17th Cloud Expo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. IBM Cloud Data Services offers a portfolio of integrated, best-of-breed cloud data services for developers focused on mobile computing and analytics use cases.
Oct. 7, 2015 12:00 PM EDT Reads: 676
Apps and devices shouldn't stop working when there's limited or no network connectivity. Learn how to bring data stored in a cloud database to the edge of the network (and back again) whenever an Internet connection is available. In his session at 17th Cloud Expo, Bradley Holt, Developer Advocate at IBM Cloud Data Services, will demonstrate techniques for replicating cloud databases with devices in order to build offline-first mobile or Internet of Things (IoT) apps that can provide a better, faster user experience, both offline and online. The focus of this talk will be on IBM Cloudant, Apa...
Oct. 7, 2015 11:45 AM EDT Reads: 494