Wednesday, 30 January 2013

Blatant click bait: ColdFusion 10 Updater 8 is...

G'day
OK, this is a cop-out of an "article", and the title is purposely designed to make you go "huh? Update 8?" (they're only up to update 7 so far).

But I notice there's been a bug raised in the installer for update 8 (update: this bug has since been deleted, so the link is dead), so I guess it's due out any day now. After (hopefully) they iron out the bugs, that is ;-)

Friday, 25 January 2013

Survey results: turning a string into an array of characters

G'day:
One of my readers pointed out to me if that if I tarry too long before reporting back on my recent survey about turning a string into an array of characters, then people would lose what little interest they have in the topic. And I admit it's not the world's most interesting topic anyhow. Anyway, I've got 35 responses, so I'll summarise the results.

Thursday, 24 January 2013

Bring back named params for <cfprocparam>

G'day
I forgot I was annoyed about this, until I was just reminded about it via Twitter & StackOverflow (no, this is not another gripe about S/O ;-).

Back in the good-old pre-CFMX days, <cfprocparam> used to support named parameters via the dbvarname attribute, eg:

Wednesday, 23 January 2013

ColdFusion: Adobe's Ugly Step-child

G'day
Here's an ironic observation that I would have made on Twitter rather than a blog article if the former allowed a reasonable size of message.

I was snooping around the ColdFusion docs website for some stuff on CFScript's try/catch, using Google to search the thing as the internal search engine ain't that great. Anyway, as I was closing tabs in my brower, one of those "would you please fill out our pointless survey to help us gather meaningless info which we will then ignore" surveys. For some reason I fill these things out on sites I regularly go to, so I set about filling this one in.

Tuesday, 22 January 2013

Quick survey / quiz: turning a string into an array of characters

G'day:
This is a bit of a random article. In conversation a coupla weeks back, a colleague questioned my approach to converting a string into an array of characters. Not questioned in a bad way, but my approach surprised them.

Anyway, this festered in my head for a coupla weeks, and popped back into it this morning on the train on the way into work.

Monday, 21 January 2013

Railo website on Raspberry Pi with a public facing domain hosted at home

G'day:

As promised on Twitter last week, here's Chris's article on getting Railo running on Rasperry Pi.

Over to Chris...



So you are a lucky owner of a sweet Raspberry Pi, you have a typical broadband connection, some ColdFusion language skills and you would like to take advantage of all these things and roll out a little Web site hosted at home, independently from any hosting provider, and make it available to your family, friends and the rest of the world? That's exactly what I've done and I thought I'd share a step-by-step guide on how my stack has been set up so you can give it a try, amend it and/or improve it.


The guide is inspired by an excellent article by Glyn Jackson on running Railo on Raspberry Pi that I found very useful when I started this exciting journey. However, the set-up described below differs slightly as the current version of Raspbian does not allow to install the official Oracle Java JDK and for that reason I'm going to opt for OpenJDK instead. And also, we don't need to worry about the SSH configuration as it's enabled by default in more recent versions of Raspbian.
Another deviation from Glyn's config is using a wired Internet connection rather than WiFi.

Prerequisites

  1. Standard broadband connection with a dynamically allocated IP address
    If you are in the UK, it can be BT, Virgin or any other popular async broadband option (and if you are lucky enough to have an Internet connection with a static IP address, you might want to skip the section covering Dynamic DNS).
  2. A router configurable to forward traffic on port 80 to a machine on the local network
    I tested it with an Apple TimeCapsule and a BT HomeHub but other routers should provide that functionality as well.
  3. Raspberry Pi (Model B) with 512MB of RAM
    I haven't tested it on the 256 model but you might like to do it at your own risk.
  4. An SD card with the Raspian GNU/Linux distribution installed on it
    A step-by-step guide covering this topic can be found on the eLinux site. You will need direct or SSH access to the box with root permissions.

Setup summary

Possible alternatives
HardwareRasbperry Pi 512MB RAM
Operating SystemGNU/Linux Raspbian
JREOpenJDK 1.6Oracle Java provided you are running a soft-float ABI distro (e.g. Debian) instead of Raspbian
Web serverLighttpdNginx
Application serverTomcat 7Jetty, Resin etc.
CFML serverRailo 4 jarsEarlier version of Railo, Open BlueDragon (not confirmed). Adobe ColdFusion is unlikely to run on such limited hardware.
Internet domain providerDNS DynamicThere is a number of alternative free and commercial services

Power

One of the great things about Raspberry Pi is its low power consumption which means having it always on should not ruin your home budget. I'm no expert on the electricity stuff but I'm powering my Pi through a USB cable hooked to the Apple TimeCapsule which acts as our home router and is always on anyway so that means there are two devices plugged to one wall socket. Does this configuration mean a decreased power consumption? I honestly don't know but it's certainly nice to have one extra power socket available.
In my case, the Pi is connected to TimeCapsule with two cables as the wired Internet connection is also coming from it (see the picture below).


Saturday, 19 January 2013

ColdFusion: 2 - Cameron: nil

G'day:
You know how I say I like being wrong? Well it's a good thing I like it as I get a lot of practise at it.

14 June 2013

I've just updated the score to be 2-0 because this very same problem just caught me out again, and when googling for the answer, came across this very blog post. Sigh. God I'm thick.


Friday, 18 January 2013

ColdFusion: makes hard things easy easy things incomprehensible

G'day:
Now this article is being true to the idea of a blog being a "web log". It's not very interesting, but it logs the high pointnadir of my day, yesterday. You will learn very little from reading this article. If that doesn't sell it to you, I don't know what will!

I got undone by how ColdFusion reports exception types.

How cool are the Railo guys?

G'day:
Just a quick one. Check this out. I was chatting with Adam Tuttle last night about some differences we'd noted in how ColdFusion and Railo seem to implement the hashCode() method for their respective struct implementations.  Here's some code (as per the thread I link to above):

Thursday, 17 January 2013

Shorthand struct notation is still buggy (follow-up & repro case)

G'day;
Brad Wood has demonstrated that he is a bit of a star, in that he has concocted a repro case for that bug I mentioned a coupla weeks back.  The repro case is buried down in the comments of that article, but here it is:

Regular expressions in CFML (part 8: the rest of CFML's support for regular expressions)

G'day:

[Copy-and-paste-from-the-previous-article alert!]

The previous sixseven entries in this series discuss what a regular expression is:
And the syntax of the regex engine ColdFusion uses:
Now I have moved on to discuss the specifics of how CFML implements regular expression technology in the language:
This article will cover the rest of the functions / tags in CFML which utilise regular expressions.

Wednesday, 16 January 2013

Random (unsuccessful) experiment: recursive JSON

G'day:
This quick experiment arose from a comment on Twitter this morning:

@daccf @ntunney the worst part is that relationships don't get serialized either. Apparently recursion is too hard for them? 
(Todd Sharp ‏@cfsilence)
This was a reaction to a bug about serialising entities which was under discussion.

Tuesday, 15 January 2013

Floating point accuracy

G'day:
This is not going to be particularly earth-shattering, sorry.

Yesterday someone asked on my favourite source of militant pedantry (Stack Overflow) how to pass a BigDecimal to POI for a spreadsheet cell value. You'll need to take my word for it, as the original question has been deleted (not sure what to make of that). There's a Google-cached version of it here. I dunno how long google caches stuff for though. The gist of the question text is (this is an abridged version of the original:

Saturday, 12 January 2013

Not that it will really matter in the bigger scheme of things...

G'day:
After all the shenanigans on Stack Overflow y/day (more of the same as last time, except a more egregious example), I've decided I can't really support Stack Overflow as a venue for the ColdFusion community to seek help. Stack Overflow is more interested in demonstrating how "good" Stack Overflow is (according to a yardstick I don't agree with) than they are in actually helping people - all people - and that's not something I can get behind.

Thursday, 10 January 2013

Regular expressions in CFML (part 7: reFind())

G'day:
The previous six entries in this series discuss what a regular expression is:
And the syntax of the regex engine ColdFusion uses:
So far, I've not really mentioned CFML in any of my examples: I've just dealt with the regex syntax. In this article (update: and the subsequent few) I'll look at the CFML tags and functions which use regular expressions.

Wednesday, 9 January 2013

Setting a CFAdmin password

G'day:
I despair. I was going to sit down tonight and be all pseudo-intellectual and watch Au Revoir les Enfants (which I have somehow managed to not yet see) on DVD, and otherwise ignore my computer. And ignore ColdFusion.  But here I am.

I had a Twitter exchange with Russ Michaels and Brad Wood about this current slew of security holes in ColdFusion (there are not one but three, apparently), and I mentioned that I couldn't be arsed looking into it to see what the actual issue was. But just like playing The Game, once the topic came up, it intrigued me more and more, so I decided whilst dinner was cooking "ah, it won't take long to find it, I'll have a look". So off I went.

Tuesday, 8 January 2013

Weird behaviour with CFHTTP and JSON

G'day:
Here's some useless information to file away wherever it is you file away such stuff.

I was code reviewing some of my colleague Dennis's (who has no online presence that I am aware of, so he doesn't get a link) work yesterday, and when processing an HTTP response, he had this sort of thing:

response = httpResponse.fileContent.toString();

My reaction was along the lines of "whoa there Nelly... it's just some JSON, so it's already intrinsically a string: we don't need to make it into a ReallyReallyString by toString()-ing it".

Well I'm glad I like being proven to be wrong, because that's what happened next.

Friday, 4 January 2013

That CFIDE security hole in ColdFusion? It's SERIOUS. So check into it NOW!

G'day:
I didn't bother writing anything about this new security problem with CF, as everyone else seems to have covered the important info already.

If you're not up to speed, read all of this lot:
And there's plenty of other blog articles about it out there (Charlie links to a bunch of good stuff).

I am only commenting now because I have just read about people stating "oh... maybe I should get around to looking at this?"

FFS. It's a really really really serious security hole which is easy to exploit, and a lot of people have found they have been exploited. This is not some esoteric in-theory-only issue.  And now that basically there are instructions of how to do it in the public domain, the risk increases.

If you have not verified you're not exposed, you are being professionally negligent.

So stop whatever you are doing and verify your externally-exposed servers are safe.

Don't piss about, and don't "do it later".

Also, if you know ColdFusion dev / admin people who don't read blogs, follow the community on Twitter and possibly won't know about this: get in touch with them (email, phone, etc).

Cheers.

--
Adam

Thursday, 3 January 2013

Regular expressions in CFML (part 6: syntax - flags and the odds 'n' sods that are left )

G'day:
This is part six of the series I started with the introduction article: "Regular Expressions in ColdFusion (part 1: overview)", and followed with a discussion entitled "Regular expressions in ColdFusion (part 2: concepts)". Then I moved onto syntax with:
"Regular expressions in ColdFusion (part 3: syntax - single characters)";
"Regular expressions in ColdFusion (part 4: syntax - repetition, sub-expressions and back-references)";
"Regular expressions in ColdFusion (part 5: syntax - look-arounds, and how the engine parses the string it's matching)".

Flags

There are a few different "modes" the regex engine can use when processing a string. These are summarised as follows:

FlagMeaning
(?x)This flags to ignore whitespace within the pattern, so one can split it across multiple lines and add comments (for clarity).
(?m)This specifies the string being matched within should be treated as multi-line, so the ^ and $ anchors can be used to denote the beginning and end of a line. The \A and \Z characters still denote the beginning and end of the entire string.
(?i)This specifies the pattern should be considered case-insensitve. This is somewhat redundant in CFML as there are separate functions for case-sensitive and case-insensitive operations. This still works though.

Tuesday, 1 January 2013

Shorthand struct notation is still buggy in CF10 (it seems)

G'day:
Happy New Year and all that sort of carry-on.

I'm still wading through this ColdFusion Bug Subscriber thing I'm writing using Coldbox. It's slow progress because the "wading" side of things erodes my patience fairly quickly, and I find something else to do. I hasten to add most of the wading is of my own manufacture due to vacillating over how to approach things, but in the early stages of things, Coldbox was being a bit annoying too. Mostly due to me not knowing what I'm doing, that said.

Anyway, I want to get it finished (it's 80% done, I guess), so have been trying to make forward progress with it over the last coupla days whilst I'm off work. With one thing or another, I have made about five lines of code's worth of progress in the last three days or so of sitting at my computer. There was a blog article or three in there, as well as a bit of Skyrim (yes, still playing Skyrim). But a lot of it has been sitting scratching my head and going "why? Just why?".