A Look at a Compact System Camera
4th September 2013During August, I acquired an Olympus Pen E-PL5 and it is an item to which I still am becoming accustomed and it looks as if that is set to continue. The main reason that it appealed to me was the idea of having a camera with much of the functionality of an SLR but with many of the dimensions of a compact camera. In that way, it was a step up from my Canon PowerShot G11 without carrying around something that was too bulky.
Before I settled on the E-PL5, I had been looking at Canon’s EOS M and got to hear about its sluggish autofocus. That it had no mode dial on its top plate was another consideration though it does pack in an APS-C sized sensor (with Canon’s tendency to overexpose finding a little favour with me too on inspection of images from an well aged Canon EOS 10D) at a not so unappealing price of around £399. A sighting of a group of it and similar cameras in Practical Photography was enough to land that particular issue into my possession and they liked the similarly priced Olympus Pen E-PM2 more than the Canon. Though it was a Panasonic that won top honours in that test, I was intrigued enough by the Olympus option that I had a further look. Unlike the E-PM2 and the EOS M, the E-PL5 does have a mode dial on its top plate and an extra grip so that got my vote even it meant paying a little extra for it. There was a time when Olympus Pen models attracted my attention before now due to sale prices but this investment goes beyond that opportunism.
The E-PL5 comes in three colours: black, silver and white. Though I have a tendency to go for black when buying cameras, it was the silver option that took my fancy this time around for the sake of a spot of variety. The body itself is a very compact affair so it is the lens that takes up the most of the bulk. The standard 14-42 mm zoom ensures that this is not a camera for a shirt pocket and I got a black Lowepro Apex 100 AW case for it; the case fits snugly around the camera, so much so that I was left wondering if I should have gone for a bigger one but it’s been working out fine anyway. The other accessory that I added was a 37 mm Hoya HMC UV filter so that the lens doesn’t get too knocked about while I have the camera with me on an outing of one sort or another, especially when its plastic construction protrudes a lot further than I was expecting and doesn’t retract fully into its housing like some Sigma lenses that I use.
When I first gave the camera a test run, I had to work out how best to hold it. After all, the powered zoom and autofocus on my Canon PowerShot G11 made that camera more intuitive to hold and it has been similar for any SLR that I have used. Having to work a zoom lens while holding a dinky body was fiddly at first until I worked out how to use my right thumb to keep the body steady (the thumb grip on the back of the camera is curved to hold a thumb in a vertical position) while the left hand adjusted the lens freely. Having an electronic viewfinder instead of using the screen would have made life a little easier but they are not cheap and I already had spent enough money.
The next task after working out how to hold the camera was to acclimatise myself to the exposure characteristics of the camera. In my experience so far, it appears to err on the side of overexposure. Because I had set it to store images as raw (ORF) files, this could be sorted later but I prefer to have a greater sense of control while at the photo capture stage. Until now, I have not found a spot or partial metering button like what I would have on an SLR or my G11. That has meant either using exposure compensation to go along with my preferred choice of aperture priority mode or go with fully manual exposure. Other modes are available and they should be familiar to any SLR user (shutter priority, program, automatic, etc.). Currently, I am using bracketing while finding my feet after setting the ISO setting to 400, increasing the brightness of the screen and adding histograms to the playback views. With my hold on the camera growing more secure, using the dial to change exposure settings such as aperture (f/16 remains a favourite of mine in spite what others may think given the size of a micro four thirds sensor) and compensation while keeping the scene exactly the same to test out what the response to any changes might be.
While I still am finding my feet, I am seeing some pleasing results so far that encourage me to keep going; some remind me of my Pentax K10D. The E-PL5 certainly is slower to use than the G11 but that often can be a good thing when it comes to photography. That it forces a little relaxation in this often hectic world is another advantage. The G11 is having a quieter time at the moment and any episodes of sunshine offer useful opportunities for further experimentation and acclimatisation too. So far, my entry in the world of compact system cameras has revealed them to be of a very different form to those of compact fixed lens cameras or SLR’s. Neither truly get replaced and another type of camera has emerged.
Mobile Phones
7th November 2010
For a long time, I wasn’t that interested in mobile telephony but a switch of job in 2010 meant that having access to the web from a mobile became desirable so I started doing that with a long relinquished BlackBerry Curve 8520; now it is Motorola hardware that I mainly use for the same kind of thing. The increased interest in mobile telephony has borne fruit in the list that you find here. The world of 3G and the devices that use it produced a learning curve for me and the availability of 5G is growing now too.
One thing that you’ll see from many a high street in the U.K. is the profusion of shops operated by mobile phone network operators and it is the same in Éire (the indigenous operator Eir has impressed me over there). These networks sell you their wares online too and that is why they are listed in their own section at the bottom. Before their listing, I have collected whatever retailers there are that are not attached to any network and there didn’t seem to be that many of them when I set up the list but it’s grown a good bit since then due to my perusing the occasional mobile phone magazine. If I find any more of these, I’ll add them on here.
Independent Retailers
These are the people with whom I have had the most dealings since I got my first ever mobile phone from them, a Motorola that I kept using until it battery kept losing its charge quickly on me. More recently, I picked up a Nokia 1661 from them that needed a look at the manual to get its call volume set properly.
If these didn’t sponsor the Buyer’s Guide in Smartphone Essentials magazine, I never would have heard of them; Derby County FC supporters should have seen their logo on the player’s shirts but I cannot say that I am a football fan. A look at the website confirms the presence of a comprehensive selection of phones for sale, contracted or otherwise.
Compared to the others, this outlet is unusual in offering only phones without contracts or pay-as-you-go arrangements. In other words, it is a place for someone running the gauntlet of the cost of going for a SIM-free phone. Saying that, they have their place and many tariffs are puffed up to pay for the more expensive device that is provided to you as part of the contract; that’s why you are tied in for a certain length of time too, so as ensure that the cost of the phone is recovered.
The name may be new to me but its Derbyshire based parent company has been involved in mobile phone reselling for more than a decade. The range that the website supplies includes not controlled contracted and pay as you go phones but also SIM cards and phones without SIM cards. That makes it worth a look along with others like it.
Networks
Haven’t had much to do with these people apart from poking around their website looking at what SIM-only deals that they have. However, hearing the experiences of others with their network takes the shine off their offer.
From the point of view of network coverage, this operator looks like your best option and would be who I would choose if I had my chance again; there have been parts of Wales and Scotland where I otherwise not have had mobile signal with my O2 account and Vodafone users were left bereft in the case of the Welsh location of Port Eynon. It was a T-Mobile PAYG BlackBerry Curve 8520 that brought me their way in 2010 and the merger with Orange soon showed its advantages when it came to network improvements. A PAYG mobile WiFi modem followed in 2011 and that uses the SIM card from a defunct Huawei mobile broadband dongle. The BlackBerry was traded for cash once a phone upgrade made available an older HTC to replace the thing; it was hideously slow and that may have had more to do with the phone that its 2G data connection. More recently, a backup Moto makes use of a PAYG account and that is how things look for now.
As it happens, I have been with this bunch since they were part of BT and known as Cellnet. The transformation to O2 and subsequent incorporation into Telefonica and Virgin Media has not meant any disruption. Their BT origins and being part of the first wave of operators has meant that network coverage is reasonable too, though voice services do come out better than data ones so that needs to be kept in mind.
For a global operator, their British and Irish networks leave something to be desired and the British one got slated in an industry appraisal. That fits with the pay-as-you-go mobile broadband dongle experience in the U.K. as well as hit and miss attempts calling Vodafone network users in Ireland. Let’s hope that those network problems get sorted because good phones need equally good connections.
Piggybacking an Android Wi-Fi device off your Windows PC’s internet connection
16th March 2013One of the disadvantages of my Google/Asus Nexus 7 is that it needs a Wi-Fi connection to use. Most of the time this is not a problem since I also have a Huawei mobile WiFi hub from T-Mobile and this seems to work just about anywhere in the U.K. Away from the U.K. though, it won’t work because roaming is not switched on for it and that may be no bad thing with the fees that could introduce. My HTC Desire S could deputise but I need to watch costs with that too.
There’s also the factor of download caps and those apply both to the Huawei and to the HTC. Recently, I added Anquet‘s Outdoor Map Navigator (OMN) to my Nexus 7 through the Google Play store for a fee of £7 and that allows access to any walking maps that I have bought from Anquet. However, those are large downloads so the caps start to come into play. Frugality would help but I began to look at other possibilities that make use of a laptop’s Wi-Fi functionality.
Looking on the web, I found two options for this that work on Windows 7 (8 should be OK too): Connectify Hotspot and Virtual Router Manager. The first of these is commercial software but there is a Lite edition for those wanting to try it out; that it is not a time limited demo is not something that I can confirm though that did not seem to be the case since it looked as if only features were missing from it that you’d get if you paid for the Pro variant. The second option is an open source one and is free of charge apart from an invitation to donate to the project.
Though online tutorials show the usage of either of these to be straightforward, my experiences were not all that positive at the outset. In fact, there was something that I needed to do and that is why this post has come to exist at all. That happened even after the restart that Conectify Hotspot needed as part of its installation; it runs as a system service so that’s why the restart was needed. In fact, it was Virtual Router Manager that told me what the issue was and it needed no reboot. Neither did it cause network disconnection of a laptop like the Connectify offering did on me and that was the cause of its ejection from that system; limitations in favour of its paid addition aside, it may have the snazzier interface but I’ll take effective simplicity any day.
Using Virtual Router Manager turns out to be simple enough. It needs a network name (also known as an SSID), a password to restrict who accesses the network and the internet connection to be shared. In my case, the was Local Area Connection on the drop down list. With all the required information entered, I was ready to start the router using the Start Network Router button. The text on this changes to Stop Network Router when the hub is operational or at least it should have done for me on the first time that I ran it. What I got instead was the following message:
The group or resource is not in the correct state to perform the requested operation.
The above may not say all that much but it becomes more than ample information if you enter it into the likes of Google. Behind the scenes, Virtual Router Manager is using native Windows functionality is create a WiFi hub from a PC and it appears to be the Microsoft Virtual Wi-Fi Miniport Adapter from what I have seen. When I tried setting up an adhoc Wi-Fi network from a laptop to the Nexus 7 using Windows’ own network set up capability via its Control Panel, it didn’t do what I needed so there might be something that third party software can do. So, the interesting thing about the solution to my Virtual Router Manager problem was that it needed me to delve into the innards of Windows a little.
Firstly, there’s running Command Prompt (All Programs > Accessories) from the Start Menu with Administrator privileges. It helps here if the account with which you log into Windows is in the Administrators group since all you have to do then is right click on the Start Menu entry and choose Run as administrator entry in the pop-up context menu. With a command line window now open, you then need to issue the following command:
netsh wlan set hostednetwork mode=allow ssid=[network name] key=[password] keyUsage=persistent
When that had done its thing, Virtual Router Manager worked without a hitch though it did turn itself after a while and that may be no bad thing from the security standpoint. On the Android side, it was a matter of going in Settings > Wi-Fi and choose the new network that have been creating on the laptop. This sort of thing may apply to other types of tablet (Dare I mention iPads?) so you could connect anything to the hub without needing to do any more on the Windows side.
For those wanting to know what’s going on behind the scenes on Windows, there’s a useful tutorial on Instructables that shows what third party software is saving you from having to do. Even if I never go down the more DIY route, I probably have saved myself having to buy a mobile Wi-Fi hub for any trips to Éire. For now, the Irish 3G dongle that I already have should be enough.
Getting VirtualBox working on Ubuntu after a kernel upgrade
27th July 2008In previous posts, I have talked about getting VMware Workstation back on its feet again after a kernel upgrade. It also seems that VirtualBox is prone to the same sort of affliction. However, while VMware Workstation fails to start at all, VirtualBox at least starts itself even if it cannot get a virtual machine going and generates errors instead.
My usual course of action is to fire up Synaptic and install the drivers for the relevant kernel. Looking for virtualbox-ose-modules-[kernel version and type] and installing that usually resolves the problem. For example, at the time of writing, the latest file available for my system would be virtualbox-ose-modules-2.6.24-19-generic. If you are a command line fan, the command for this would be:
sudo apt-get install virtualbox-ose-modules-2.6.24-19-generic
The next thing to do would be to issue the command to start the vboxdrv service and you’d be all set:
sudo /etc/init.d/vboxdrv start
There is one point of weakness (an Achilles heal, if you like) with all of this: the relevant modules need to be available in the first place and I hit a glitch after updating the kernel to 2.6.24-20 when they weren’t; I do wonder why Canonical fail to keep both in step with one another and why the new kernel modules don’t come through the updates automatically either. However, there is a way around this too. That means installing virtualbox-ose-source via either Synaptic or the command line:
sudo apt-get install virtualbox-ose-source
The subsequent steps involve issuing more commands to perform a reinstallation from the source code:
sudo m-a prepare
sudo m-a auto-install virtualbox-ose
Once these are complete, the next is to start the vbox drv as described earlier and to add yourself to vboxusers group if you’re still having trouble:
sudo adduser [your username] vboxusers
The source code installation option certainly got me up and running again and I’ll be keeping it on hand for use should the situation raise its head again.
Office 2007 on test…
23rd January 2007With its imminent launch and having had a quick at one of its beta releases, I decided to give Office 2007 a longer look after it reached its final guise. This is courtesy of the demonstration version that can be downloaded from Microsoft’s website; I snagged Office Standard which contains Word, Excel, PowerPoint and Outlook. Very generously, the trial version that I am using gives me until the end of March to come to my final decision.
And what are my impressions? Outlook, the application from the suite that I most use, has changed dramatically since Outlook 2002, the version that I have been using. Unless you open up an email in full screen mode, the ribbon interface so prevalent in other members of the Office family doesn’t make much of an appearance here. The three-paned interface taken forward from Outlook 2003 is easy to get around. I especially like the ability to collapse/expand a list of emails from a particular sender: it really cuts down on clutter. The ZoneAlarm anti-spam plug-in on my system was accepted without any complaint as were all of my PST files. One thing that needed redoing was the IMAP connection to my FastMail webmail account but that was driven more by Outlook warning messages than by necessity from a user experience point of view. I have still to get my Hotmail account going but I lost that connection when still using Outlook 2002 and after I upgraded to IE7.
What do I make of the ribbon interface? As I have said above, Outlook is not pervaded by the new interface paradigm until you open up an email. Nevertheless, I have had a short encounter with Word 2007 and am convinced that the new interface works well. It didn’t take me long to find my way around at all. In fact, I think that they have made a great job of the new main menu triggered by the Office Button (as Microsoft call it) and got all sorts of things in there; the list includes Word options, expanded options for saving files (including the new docx file format, of course, but the doc format has not been discarded either) and a publishing capability that includes popular blogs (WordPress.com, for instance) together with document management servers. Additionally, the new zoom control on the bottom right-hand corner is much nicer than the old drop down menu. As regards the “ribbon”, this is an extension of the tabbed interfaces seen in other applications like Adobe HomeSite and Adobe Dreamweaver, the difference being that the tabs are only place where any function is found because there is no menu back up. There is an Add-ins tab that captures plug-ins to things like Adobe Distiller for PDF creation. Macromedia in its pre-Adobe days offered FlashPaper for doing the same thing and this seems to function without a hitch in Word 2007. Right-clicking on any word in your document not only gives you suggested corrections to misspellings but also synonyms (no more Shift-F7 for the thesaurus, though it is still there is you need it) and enhanced on-the-spot formatting options. A miniature formatting menu even appears beside the expected context menu; I must admit that I found that a little annoying at the beginning but I suppose that I will learn to get used to it.
My use of Outlook and Word will continue, the latter’s blogging feature is very nice, but I haven’t had reason to look at Excel or PowerPoint in detail thus far. From what I have seen, the ribbon interface pervades in those applications too. Even so, my impressions the latest Office are very favourable. The interface overhaul may be radical but it does work. Their changing the file formats is a more subtle change but it does mean that users of previous Office versions will need the converter tool in order for document sharing to continue. Office 97 was the last time when we had to cope with that and it didn’t seem to cause the world to grind to a halt.
Will I upgrade? I have to say that it is very likely given what is available in Office Home and Student edition. That version misses out on having Outlook but the prices mean that even buying Outlook standalone to compliment what it offers remains a sensible financial option. Taking a look at the retail prices on dabs.com confirms the point:
Office Home and Student Edition: £94.61
Office Standard Edition: £285.50
Office Standard Edition Upgrade: £175.96
Outlook 2007: £77.98
Having full version software for the price of an upgrade sounds good to me and it is likely to be the route that I take, if I replace the Office XP Standard Edition installation that has been my mainstay over the last few years. Having been on a Windows 95 > Windows 98 > Windows 98 SE > Windows ME upgrade treadmill and endured the hell raised when reinstallation becomes unavoidable, the full product approach to getting the latest software appeals to me over the upgrade pathway. In fact, I bought Windows XP Professional as the full product in order to start afresh after moving on from Windows 9x.
Setting up a WD My Book Live NAS on Ubuntu GNOME 13.10
1st December 2013The official line from Western Digital is that they do not support the use of their My Book Live NAS drives with Linux or UNIX. However, what that means is that they only develop tools for accessing their products for Windows and maybe OS X. It still doesn’t mean that you cannot access the drive’s configuration settings by pointing your web browser at http://mybooklive.local/. In fact, not having those extra tools is no drawback at all since the drive can be accessed through your file manager of choice under the Network section and the default name is MyBookLive too so you easily can find the thing once it is connected to a router or switch anyway.
Once you are in the servers web configuration area, you can do things like changing its name, updating its firmware, finding out what network has been assigned to it, creating and deleting file shares, password protecting file shares and other things. These are the kinds of things that come in handy if you are going to have a more permanent connection to the NAS from a PC that runs Linux. The steps that I describe have worked on Ubuntu 12.04 and 13.10 with the GNOME desktop environment.
What I was surprised to discover that you cannot just set up a symbolic link that points to a file share. Instead, it needs to be mounted and this can be done from the command line using mount or at start-up with /etc/fstab. For this to happen, you need the Common Internet File System utilities and these are added as follows if you need them (check on the Software Software or in Synaptic):
sudo apt-get install cifs-utils
Once these are added, you can add a line like the following to /etc/fstab:
//[NAS IP address]/[file share name] /[file system mount point] cifs
credentials=[full file location]/.creds,
iocharset=utf8,
sec=ntlm,
gid=1000,
uid=1000,
file_mode=0775,
dir_mode=0775
0 0
Though I have broken it over several lines above, this is one unwrapped line in /etc/fstab with all the fields in square brackets populated for your system and with no brackets around these. Though there are other ways to specify the server, using its IP address is what has given me the most success and this is found under Settings > Network on the web console. Next up is the actual file share name on the NAS and I have used a custom them instead of the default of Public. The NAS file share needs to be mounted to an actual directory in your file system like /media/nas or whatever you like and you will need to create this beforehand. After that, you have to specify the file system and it is cifs instead of more conventional alternatives like ext4 or swap. After this and before the final two space delimited zeroes in the line comes the chunk that deals with the security of the mount point.
What I have done in my case is to have a password protected file share and the user ID and password have been placed in a file in my home area with only the owner having read and write permissions for it (600 in chmod-speak). Preceding the filename with a “.” also affords extra invisibility. That file then is populated with the user ID and password like the following. Of course, the bracketed values have to be replaced with what you have in your case.
username=[NAS file share user ID]
password=[NAS file share password]
With the credentials file created, its options have to be set. First, there is the character set of the file (usually UTF-8 and I got error code 79 when I mistyped this) and the security that is to be applied to the credentials (ntlm in this case). To save having no write access to the mounted file share, the uid and gid for your user needs specification with 1000 being the values for the first non-root user created on a Linux system. After that, it does no harm to set the file and directory permissions because they only can be set at mount time; using chmod, chown and chgrp later on has no effect whatsoever. Here, I have set permissions to read, write and execute for the owner and the user group while only allowing read and execute access for everyone else (that’s 775 in the world of chmod).
All of what I have described here worked for me and had to gleaned from disparate sources like Mount Windows Shares Permanently from the Ubuntu Wiki, another blog entry regarding the permissions settings for a CIFS mount point and an Ubuntu forum posting on mounting CIFS with UTF-8 support. Because of the scattering of information, I just felt that it needed to all together in one place for others to use and I hope that fulfils someone else’s needs in a similar way to mine.
Technet Plus subscription
19th January 2007I have a free subscription to Microsoft‘s Microsoft Learn but with the onset of Vista and the latest issue dangles a carrot in front of me: the idea of a Technet Plus subscription. Trouble is that it is £283 per annum in the UK, not cheap. Nevertheless, that does rather neatly compare to the price of Windows Vista and that comes as part of the package. I think that I’ll revisit the idea when upgrading time comes and that will be a while after the Vista launch date of 30/1/2007. Given the security changes in the latest Windows incarnation, I’ll wait to ensure that I will not be put out too much before making the jump.
Camera tales
20th January 2007Anyone who has ever been on HennessyBlog will know that I enjoy walking in the countryside and that I always have a camera with me when I do. Like many digital SLR owners, I am beginning to see the tell-tale spots in my photos that are caused by a dirty sensor. And it isn’t that I am continually changing lenses either: I rarely remove the Sigma 18-50 mm DC zoom lens that I use with the camera. Rather than trusting myself with the cleaning (I have had a go already without much success), I am giving serious consideration to letting the professionals take care of my Canon EOS 10D, my only digital camera. I have already been quoted something of the order of £35 by a Canon service centre not far from me and am seriously considering taking them up on the offer.
Of course, sending it away to them means that I will have to forego the ability to include photos with posts on HennessyBlog describing my walks in the kind of timescale to which I have become accustomed; of course, this is where digital really scores. I will still have a camera with me as film remains my mainstay, even in this digital age. The camera in question is another Canon, an EOS 30 that I acquired used from Ffordes Photographic. While taking a recent peek at their website, I have just spied a used EOS 1V going for £399, a song for what remains Canon’s top of the range film SLR. Yes, I am tempted but I must stay real. In fact, I did not pay full price for my EOS 10D. That was part of the run-out stock that 7dayshop.com were selling off at next to half of the EOS 10D’s original asking price in the wake of its being superseded by the EOS 20D (itself since replaced by the EOS 30D: digital is a fast-moving world).
Sending a camera away for attention is not new to me as I also acquired a used Minolta X-700 manual focus SLR, again obtained from Ffordes, and that needed a spot of maintenance after a year in my possession. There was a problem with the shutter that cost me £75 to get Minolta to fix. Now that Minolta as a camera maker is no more, I was wondering who would attend to it in the future. That question was answered by a recent look on the web: in the UK it is JP Service Solutions, a division of Johnson’s Phototopia. Konica Minolta retain this information on their website. Konica Minolta’s failure to capitalise effectively on the digital revolution in its early days, particularly in the SLR area where they gifted their competitors a massive head start, cost them their future in the photographic business and now Sony continues the mantle, a sad end to one of camera manufacturing’s great innovators.
Returning to my digital-less dilemma, I suppose that I could get another digital for backup duty; I have to admit that a DSLR is a bulky contraption to be carrying in airline luggage. The camera that has made it onto my wish list is Ricoh’s GR Digital, a highly regarded offering that follows in the great tradition of its film forbears, the GR 1 and GR 21. Given that my first 35 mm camera was a Ricoh, and I have it still, this would be a case of returning to my roots. Of course, having it on a wish list is very different from having it on the to-do list and finances will certainly dictate if the purchase is made, though a finance deal offered by Warehouse Express does make it more accessible. Maybe some day…
Never undercutting the reseller…
23rd October 2009Quite possibly, THE big technology news of the week has been the launch of Windows 7. Regular readers may be aware that I have been having a play with the beta and release candidate versions of the thing since the start of the year. In summary, I have found to work both well and unobtrusively. There have been some rough edges when access files through VirtualBox’s means of accessing the host file system from a VM but that’s the only perturbation to be reported and, even then, it only seemed to affect my use of Photoshop Elements.
Therefore, I had it in mind to get my hands on a copy of the final release after it came out. Of course, there was the option of pre-ordering but that isn’t for everyone so there are others. A trip down to the local branch of PC World will allow you to satisfy your needs with full, upgrade (if you already have a copy of XP or Vista, it might be worth trying out the Windows Secrets double installation trick to get it loaded on a clean system) and family packs. The last of these is very tempting: three Home Premium licences for around £130. Wandering around to your local PC components emporium is an alternative but you have to remember that OEM versions of the operating system are locked to the first (self-built) system on which they are installed. Apart from that restriction, the good value compared with retail editions makes them worth considering. The last option that I wish to bring to your attention is buying directly from Microsoft themselves. You would think that this may be cheaper than going to a reseller but that’s not the case with the Family Pack costing around £150 in comparison to PC World’s pricing and it doesn’t end there. That they only accept Maestro debit cards along with credit cards from the likes of Visa and Mastercard perhaps is another sign that Microsoft are new to whole idea of selling online. In contrast, Tesco is no stranger to online selling but they have Windows 7 on offer though they aren’t noted for computer sales; PC World may be forgiven for wondering what that means but who would buy an operating system along with their groceries? I suppose that the answer to that would be that people who are accustomed to delivering one’s essentials at a convenient time should be able to do the same with computer goods too. That convenience of timing is another feature of downloading an OS from the web and many a Linux fan should know what that means. Microsoft may have discovered this of late but that’s better than never.
Because of my positive experience with the pre-release variants of Windows 7, I am very tempted to get my hands on the commercial release. Because I have until early next year with the release candidate and XP works sufficiently well (it ultimately has given Vista something of a soaking), I’ll be able to bide my time. When I do make the jump, it’ll probably be Home Premium that I’ll choose because it seems difficult to justify the extra cost of Professional. It was different in the days of XP when its Professional edition did have something to offer technically minded home users like me. With 7, XP Mode might be a draw but with virtualisation packages like VirtualBox available for no cost, it’s hard to justify spending extra. In any case, I have Vista Home Premium loaded on my Toshiba laptop and that seems to work fine, in spite of all the bad press that Vista has gotten for itself.
Tidying dynamic URL’s
15th June 2007A few years back, I came across a very nice article discussing how you would make a dynamic URL more palatable to a search engine and I made good use of its content for my online photo gallery. The premise was that URL’s that look like that below are no help to search engines indexing a website. Though this is received wisdom in some quarters, it doesn’t seem to have done much to stall the rise of WordPress as a blogging platform.
http://www.mywebsite.com/serversidescript.php?id=394
That said, WordPress does offer a friendlier URL display option too and you can see this in use on this blog; they look a little like the example URL that you see below, and the approach is equally valid for both Perl and PHP. I have been using the same approach for the Perl scripts powering my online phone gallery and now want to apply the same thinking to a gallery written in PHP:
http://www.mywebsite.com/serversidescript.pl/id/394
The way that both expressions work is that a web server will chop pieces from a URL until it reaches a physical file. For a query URL, the extra information after the question mark is retained in its QUERY_STRING variable while extraneous directory path information is passed in the variable PATH_INFO. For both Perl and PHP, these are extracted from the entries in an array; for Perl, this array is called is $ENV and $_SERVER is the PHP equivalent. Thus, $ENV{QUERY_STRING} and $_SERVER{‘QUERY_STRING’} traps what comes after the “?” while $ENV{PATH_INFO} and $_SERVER{‘PATH_INFO’} picks up the extra information following the file name (the “/id/394/” in the example). From there on, the usual rules apply regarding cleaning of any input but changing from one to another should be too arduous.