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  • Integrating with a payment provider; Proper and robust OOP approach

    - by ExternalUse
    History We are currently using a so called redirect model for our online payments (where you send the payer to a payment gateway, where he inputs his payment details - the gateway will then return him to a success/failure callback page). That's easy and straight-forward, but unfortunately quite inconvenient and at times confusing for our customers (leaving the site, changing their credit card details with an additional login on another site etc). Intention & Problem description We are now intending to switch to an integrated approach using an exchange of XML requests and responses. My problem is on how to cater with all (or rather most) of the things that may happen during processing - bearing in mind that normally simplicity is robust whereas complexity is fragile. Examples User abort: The user inputs Credit Card details and hits submit. An XML message to the provider's gateway is sent and waiting for response. The user hits "stop" in his browser or closes the window. ignore_user_abort() in PHP may be an option - but is that reliable? might it be better to redirect the user to a "please wait"-page, that in turn opens an AJAX or other request to the actual processor that does not rely on the connection? Database goes away sounds over-complicated, but with e.g. a webserver in the States and a DB in the UK, it has happened and will happen again: User clicks together his order, payment request has been sent to the provider but the response cannot be stored in the database. What approach could I use, using PHP to sort of start an SQL like "Transaction" that only at the very end gets committed or rolled back, depending on the individual steps? Should then neither commit or roll back have happened, I could sort of "lock" the user to prevent him from paying again or to improperly account for payments - but how? And what else do I need to consider technically? None of the integration examples of e.g. Worldpay, Realex or SagePay offer any insight, and neither Google or my search terms were good enough to find somebody else's thoughts on this. Thank you very much for any insight on how you would approach this!

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  • Are there any good books on how to design software?

    - by nc01
    I've been programming for a while and I think I write clean code. But I do this by hacking away, tinkering and testing things until I feel good about the functionality, and then coming in and refactoring, refactoring, refactoring. I tend to write mostly in PHP, Java, and C. Are there any good books that will help me learn to visualize things better and not code everything as if in an infinite REPL loop? Thanks.

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  • GDD-BR 2010 [0B] Maps API V3: New Features and How to Use them

    GDD-BR 2010 [0B] Maps API V3: New Features and How to Use them Speaker: Ossama Alami Track: Google APIs Time slot: B [11:15 - 12:00] Room: 0 Level: 201 The Javascript Maps API v3 is the future of the Google Maps API. Come learn why we built it, how to use it and about some exciting new features not available in V2. From: GoogleDevelopers Views: 2 0 ratings Time: 43:37 More in Science & Technology

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  • WebM and VP8 land in Chromium

    A developer preview of WebM , a high-quality, open, freely implementable, and web-optimized video format was announced today. Initial support for WebM, including its video codec VP8 will...

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  • Beginner's Walk - Web Development

    This Table of Contents is editable by all Silver members and above. What we want you to do is replace the entries in the Table of Contents below with links to articles that represent the entries.

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  • Google I/O Sandbox Case Study: VectorUnit

    Google I/O Sandbox Case Study: VectorUnit We interviewed VectorUnit at the Google I/O Sandbox on May 11, 2011 and they explained to us the benefits of building for the Android Platform. VectorUnit creates console-quality video games for the Android. For more information on Android developers, visit: developers.android.com For more information on VectorUnit, visit vectorunit.com From: GoogleDevelopers Views: 13 0 ratings Time: 01:33 More in Science & Technology

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  • Google I/O 2012 - The Web Platform's Cutting Edge

    Google I/O 2012 - The Web Platform's Cutting Edge Dimitri Glazkov, Alex Komoroske From embeds to widgets to managing complex applications, you constantly face the need for better componentization as a web developer. Many-a-lines of JavaScript have been written to alleviate this problem -- poorly. But help is on the way. The web platform is gaining a powerful new set of capabilities designed to better help you build robust, reusable, and packageable components. We'll cover what they do, their status, and how you can start playing with these powerful emerging technologies today. Most importantly, we'll show you how to get involved and help influence their direction as they mature. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 2795 48 ratings Time: 47:45 More in Science & Technology

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  • Google I/O 2012 - Navigation in Android

    Google I/O 2012 - Navigation in Android Adam Powell, Richard Fulcher An app is useless if people can't find their way around it. Android introduced big navigation-support changes in 3.0 and 4.0. The Action Bar offers a convenient control for Up navigation, the Back key's behavior became more consistent within tasks, and the Recent Tasks UI got an overhaul. In this talk, we discuss how and why we got where we are today, how to think about navigation when designing your app's user experience, and how to write apps that offer effortless navigation in multiple Android versions. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 31 0 ratings Time: 01:01:53 More in Science & Technology

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  • Google Cloud Storage Office Hours - 9/5/2012

    Google Cloud Storage Office Hours - 9/5/2012 This session explains how to serve websites directly from Google Cloud Storage (including how to associate your storage resources with a custom domain name), followed by a Q&A session. Demo fun begins at 17:30! The slides (including live demo) can be found here: tinyurl.com From: GoogleDevelopers Views: 164 8 ratings Time: 50:13 More in Science & Technology

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  • Google+ Platform Office Hours (EMEA Edition): Devfest London & Hangouts

    Google+ Platform Office Hours (EMEA Edition): Devfest London & Hangouts For those who couldn't make it to this weekend's #devfestlondon at +Campus London, Google+ Platform Office Hours in Europe continues on Wednesday with a roundup of some of +Silvano Luciani, +Ian Barber and +Lee Denison's favourite moments from the event. +Silvano Luciani will be showing us how we too can Be +Paul Irish with the Hangout app he presented during the weekend, and we'll be talking about how to build Google Analytics into Hangout apps to make it easier to measure usage. From: GoogleDevelopers Views: 49 6 ratings Time: 19:29 More in Science & Technology

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  • A colourblind member of our team...

    - by dbramhall
    We rely a lot on colour within our code within our team to outline features that need working on and what needs attention, we we think can be improved (we mainly colour the line of the code) for the application we're developing, however we have a close friend that is colourblind and he wants to join our team despite our heavily reliance on colour. Do you have any other recommendations as to how a team can highlight what needs work on without the use of colour - our team is about 25 people that are all accustom to the line colouring system and we have found it be most efficient.

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  • YouTube API @ Google I/O 2010

    Kuan Yong, Gareth McSorley and I -- representing Product Management, Engineering, and Developer Relations, respectively -- were happy to present a YouTube API session at this year’s Google...

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