Gears For Safari

9/15/2008 06:22:00 AM
Posted by Jeremy Moskovich and Matt Perry, Gears Engineers

We're really excited to announce the official release of Gears for Safari on OS X (minimum requirements are Leopard 10.5.3 or Tiger 10.4.11).

You can download it today from http://gears.google.com.

This means that you can now access all the Gears-enabled sites (such as Zoho office, WordPress, the new YouTube uploader and Google Docs offline) in Safari.

Since launch, we've increased the number of APIs available in Gears. The 0.3 release added the ability to create desktop shortcuts for websites, and the 0.4 release added Geolocation and Blobs (useful for resumable uploads of large files). All of these are now available in Safari and work exactly the same as on the other browsers Gears supports.

We thought it might be interesting to talk about some of the technical aspects of Gears peculiar to Safari and OS X. If you aren't a developer you can safely skip the following paragraphs and go straight to the download page.

When you install Gears, you'll notice that it's composed of 2 components: an NPAPI plugin which lives in "/Library/Internet Plugins" and an InputManager. Gears needs to load first thing upon browser startup, for cases in which the first page loaded into the browser is from the Gears offline cache. NPAPI provides no mechanism for loading that early (it only provides support for loading plugins the first time a page specifically includes them) so we needed a small InputManager to do the work for us.

For browsers other than Safari that use the WebKit engine, we've provided a really simple mechanism to allow them to load Gears into their program without using the InputManager. Fluid is one example of a 3rd party browser that supports Gears this way.

On the Mac, Gears desktop shortcuts are actually small applications that are designed to open the website in the same browser they were originally created from. This means that if you created them from a Fluid app they'll open in that same place and if you've got multiple versions of Firefox installed on your machine the shortcut will open in the right one.

We hope you've found this post interesting. If you have any feedback we'd love to hear from you on our mailing list.

Gears 0.4 is here!

8/22/2008 12:15:00 AM
Posted by Andrei Popescu, Gears Engineer

But where exactly is 'here'? Well, that's a question that takes on a whole new meaning with this new release of Gears: we have added a new Geolocation API, which allows you to build applications that can do new and exciting things based on your users' location. You can query Gears for the user's current location using the getCurrentPosition() method or you can ask Gears to notify you every time the location changes, using the watchPosition() method. Of course, we take privacy issues very seriously, which is why we have a special permission dialog that allows users to decide which Web sites should have access to their location information. If you want to learn more about how the Geolocation API works, please see the Google Code blog post.

Another cool new feature is the Blob API. Unlike strings, blobs let you reference arbitrary binary data — a first for JavaScript! Therefore, blobs can more naturally represent things like files and images, and they can be passed around efficiently. We have updated several existing APIs to work with blobs, such as WorkerPool sendMessage() and HttpRequest send(). And that's not all! We have also extended the Desktop API with a new method, openFiles(), which allows users to select multiple files of a particular content type, and then returns them as blobs for easy uploading or worker processing.

Other major changes in Gears 0.4 include:

• onprogress() events for HTTP downloads and uploads
  
• Gears dialogs localized to 40 languages
  

For the full list of changes, you can check out the Gears API history.

If you are a developer anxious to try these new APIs, first check gears.google.com to make sure you have Gears 0.4 installed (your browser should be updated automatically) and then browse the Gears documentation pages. If you are a mobile developer, please make sure you also read our Google Mobile blog post to learn more details about what devices support the Geolocation API.

Finally, an update on how we are doing on Web standards: in line with our earlier promises, the Geolocation API is a W3C Editor's draft and its current design is a result of open collaboration with many other people and organizations. We plan to continue to drive this standardization effort, as well work with the community on new Web standards.

Speeding Up WordPress With Gears

7/10/2008 05:09:00 PM
Posted by Brad Neuberg, Gears Team

WordPress.com just recently went live with Gears support for accelerating the user-interface, and the upcoming WordPress 2.6 release will also bundle Gears.

Andrew Ozz, a member of the WordPress team and the person responsible for the Gears integration wrote the following guest post on his experience working with Gears:

I thoroughly enjoyed working with Gears. After checking the excellent API documentation and examples, the test implementation of a ManagedResourceStore in WordPress was ready to go in about an hour.

After that I only had to refine the various status messages and user prompts and the first step of implementing Gears support in WordPress was ready for public testing. That was the fastest and easiest integration with another open source software I've had the opportunity to contribute to.

Currently WordPress implements Gears support in a somewhat "non-traditional" way. It uses only the local storage to cache all static files from the admin interface on the user's computer, eliminating needless requests to the server and improving page load speed, quite significantly in some cases.

Some of the limitations of this are that Gears prompts for permission on each sub-domain, so when a user has several blogs on WordPress.com, it will have to be enabled for each separately. Another is that although all files are served from the local storage in SSL mode, the browser reports that the web page is partially encrypted.

The Gears support is already live on WordPress.com, and is included in the next version of the self-hosted WordPress, that is due in a few days.

In my opinion Gears is more than an easy way to enable online applications to work offline. It extends the web browser into an OS independent application development platform. I won't be surprised to see some very different web enabled desktop applications built with it.

This is not an April Fool's joke!

4/01/2008 12:38:00 PM
Posted by Aaron Boodman, Gears Engineer

As of yesterday, it is possible to use Google Docs offline. We've all been working on this for a while now, and I think sometimes we take it for granted. A web-based word processor you can use without an internet connection?! Who'd'a thunk it?

Gigantic congrats to the Docs team, from all of us working on Gears. We especially love how simple you have made the setup and synchronization process.

Sometime soon, we'll have to get one of the Docs engineers to write a blog post about some of the challenges they faced bringing this together. There are some really interesting stories and lessons in there that would be useful to anyone aiming to offline-enable their web application.

To see offline Docs in action, check out the video below.

Google Gears in Your Pocket

3/03/2008 11:10:00 PM
Posted by Chris Prince, Software Engineer

Today is an exciting day for mobile application development, as it marks the first release of Google Gears on mobile devices. Gears is initially available for Internet Explorer on Windows Mobile 5 and 6.

Consider the sad state of mobile app development today: you often need to write native code, and build against four different SDKs, using five different compilers. It's a daunting task, which explains why so few people write mobile applications.

Web apps are an obvious way to deliver functionality across mobile devices. You can write your application just once. So why hasn't this approach been more widely adopted? Mobile browsers simply cannot do much of what you want applications to do.

Enter Google Gears. The mission of Gears is to extend the capabilities of web browsers. It is clear to us that mobile browsers can benefit just as much as desktop ones. By adding features to mobile browsers, it becomes possible to deploy an increasing number of mobile applications as web apps.

Furthermore, we plan to keep the Gears API consistent across all platforms. So as long as you account for browser differences (such as different screen sizes and DOM quirks), the rest of your application will "just work" across users' systems. You don't need to worry whether you are running on a mobile device or a desktop machine.

We are very excited by the potential here. We expect mobile apps built using Google Gears to usher in a new trend in mobile application development.

For more information, check out the interview Dion Almaer conducted with some of the engineering masterminds behind mobile Gears:

Andrei Popescu and Dave Burke describe what it was liking bringing Gears to Windows Mobile, and the motivations for the project.

Gears PubTools: Offline Enable Content in Minutes

2/21/2008 02:38:00 PM
Posted by Brad Neuberg, Developer Advocate

As a Developer Advocate who wants to help developers use Gears, I've created some simple open source utilities to make it much easier to work with Google Gears without having to delve into JavaScript. This new open source library, named Gears PubTools, is a simple collection of JavaScript files that make it easy for content authors to work with Google Gears using just a little bit of HTML. With PubTools, you can easily offline-enable your static content within minutes. Read the full details here. Please note that PubTools is not part of the official Gears distribution; it is simply a collection of open source utilities I have created to make using Gears much easier for static content.