It’s time for the 2012 General Election in the United States and along with it comes the tedious process of finding your voter registration, polling sites, times, directions, etc. The previously announced Google Civic Information API provides a great service to programmatically obtain much of this information based on the your home address. Google Apps Script makes it really quick and easy to build a web application that queries this information and uses various Google services to organize and track your information.
Election Info is a sample application built using Apps Script that can:
HtmlService
UrlFetch
MapsService
UserProperties
As you can see, this is a comprehensive sample app that is useful while also highlighting key Apps Script capabilities.
Install the app from the Chrome Web Store. Check back soon as we will be writing a blog post with details and sample code on how the sample was built.
Since we released version 2 of the Google Drive SDK at Google I/O, we’ve been quietly updating the DrEdit sample application to use the new API. As part of the update, the UI for DrEdit has been rewritten to use AngularJS, a modern web application toolset developed by Google and used in apps at DoubleClick. You might be wondering -- why go through the trouble of rewriting the UI for a basic sample app just to show off some new API features? Turns out it was more of a happy coincidence, but a valuable one and great learning experience!
I had the pleasure of co-presenting a session on building great apps for Google Drive, and a big focus of the talk was on all the little things that go into making an app intuitive and user-friendly. This is particularly important for Google Drive, where many users are already familiar with the built-in apps like Docs, Presentations, and Spreadsheets.
The first version of DrEdit was a good demo app, but didn’t follow all of our recommendations. I didn’t want to tell developers all the things they should be doing without having tried them myself. I decided to write a separate sample for the talk and needed a solid base to build on. It was the perfect opportunity to learn a new tool!
Angular doesn’t aim to abstract away HTML, Javascript & CSS. Rather, it enhances HTML to make building dynamic apps easier. One benefit, besides a nice short learning curve, is the positive interaction with other tools. To give the app some structure, I used Bootstrap. For example, the HTML for displaying the authenticated user’s info and a small dropdown to link to their profile in the navigation bar only required a few minor changes from typical Bootstrap usage (shown in bold) to wire up to a controller.
<ul class="nav pull-right" ng-controller="UserCtrl"> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" href="#"> {{user.email}} </a> <ul class="dropdown-menu"> <li><a href="{{user.link}}" target="_blank">Profile</a></li> </ul> </li> </ul>
Even models are plain javascript objects. Anything reachable through a scope (the binding between a view and controller) is considered part of the model. These can be primitives, hashes, or objects. No need to extend a base class or access properties through special properties. Rather than use change listeners that require special instrumentation, Angular uses dirty checking to detect model changes and update views.
The one catch with this approach is it requires any changes to the model to be made inside the scope of a scope.$apply(fn) call. In most cases, this is done automatically. When working with external libraries or raw XMLHttpRequests that can fire asynchronous callbacks, calling $apply yourself is necessary to make sure mutations are tracked correctly.
scope.$apply(fn)
$apply
Speaking of asynchronous tasks…
No, I’m not talking about the hit song by 80’s band Naked Eyes, rather Angular’s $q service based on one of the proposed CommonJS Promises APIs. If you’re already familiar with JQuery’s deferred object or any of the other related implementations, this is familiar territory. If not, time to learn. Working with deferred objects can be a lot easier than the traditional callback approach. You can compose async tasks either serially or in parallel, chain callbacks, and return deferred objects from functions like normal results.
Where this mostly comes into play is Angular’s $http service. If you’ve used jQuery, you’ll find it similar to jQuery.ajax() & the jqXHR result. It is based on the deferred/promises API and also ensures callbacks are executed correctly inside $apply for safe & efficient model mutations. This combination makes it easy to work with remote services in Angular.
$http
Trying to learn some new frameworks while preparing for Google I/O and helping developers to launch apps on our updated API all within a few weeks was a lot to take on. A few corners were cut and there are a few things I’d like to revisit when time permits:
<editor content=”myModel.text”/>
I know I’ve only scratched the surface and have a lot more to learn. Even so, it was incredibly fun diving head first into AngularJS, and I highly recommend considering it if you’re dissatisfied with your current framework or just want to learn something new!
Do you like to store photos in Google Drive? You are not alone! Photographs are one of the most common file types stored in Google Drive. The Google Drive API now exposes Exif data for photos, so that Google Drive Apps can use it. The Exif data contains information about camera settings and photo attributes.
Despite being an awful photographer, I love photographing benches, and here is one I took while at the beach. Let’s have a look at some of these new fields for this photo.
When I examine the metadata for this image using a drive.files.get call, there is now a field, imageMediaMetadata, containing the detailed photo information:
drive.files.get
imageMediaMetadata
"imageMediaMetadata": { "width": 2888, "height": 1000, "rotation": 0, "date": "2012:07:08 15:22:25", "cameraMake": "NIKON CORPORATION", "cameraModel": "NIKON D90", "exposureTime": 8.0E-4, "aperture": 5.6, "flashUsed": false, "focalLength": 105.0, "isoSpeed": 200 }
So whether you are just storing your amateur snaps like me, or using Google Drive to store serious photographs, we hope this will be useful information for Drive apps. For example, a photo organizing application will be able to create thumbnail and information views for photos without ever having to download them.
For more information, please visit our documentation, and if you have any technical questions, please ask them on StackOverflow. Our team are waiting to hear from you.
Whenever you upload a file to Google Drive, we try to be smart and understand more about the new file. We index its text content, generate thumbnails and even use Google Goggles to recognize images. However, as any kind of files can be uploaded to Drive, there are cases where it is impossible for Drive to understand what the file content is. For instance, when inserting or updating a shortcut, the file content is not known to Drive and a thumbnail can’t be automatically generated.
Developers can now use the Google Drive SDK to provide thumbnail images for those files. The new thumbnail property on the File resource includes two sub-properties that you can set when uploading a new file or updating an existing one: “image” to contain the base64-encoded image data and “mimeType” to specify one of the supported image formats: “image/png”, “image/gif”, or “image/jpeg”.
As thumbnails must reflect the current status of the file, they are invalidated every time the file content changes, so your application should make sure to always upload a new thumbnail together with the updated content.
For more information and to learn about all requirements and recommendations about this new feature, please refer to the Uploading thumbnails section of the Google Drive SDK documentation, and don’t hesitate to ask us your technical questions!
The Drive SDK allows apps to store all kinds of files and file-like items in user-managed cloud storage. Files can be standard document formats like PDF, images, video & audio clips, or even your proprietary application data files. Storing files in Drive makes it easy for users to organize, search, and securely share them with their coworkers, friends, or family.
However, some applications work better with document or application data stored in a database. For example, let’s imagine a modern, web-based project management tool that provides lots of awesome features via data objects that are assembled dynamically at runtime for presentation to the user. In such cases, there is no single file to store all the data that comprises the project -- though there is of course a named “file” item that users will want to save and list in their Drive. Drive applications like this can create file-like entries called shortcuts that allow users to organize, access, and share items as if they were files stored in Drive.
Creating a shortcut is not much different than creating a regular file. Just set the MIME type to application/vnd.google-apps.drive-sdk, and make sure you don’t upload any actual content in the call to files.insert. Here’s an example of creating a shortcut using Python:
application/vnd.google-apps.drive-sdk
files.insert
shortcut = { 'title': 'My project plan', 'mimetype': 'application/vnd.google-apps.drive-sdk', 'description': 'Project plan for the launch of our new product!' } file = service.files().insert(body=shortcut).execute() key = file['id'] # Key to use when re-opening shortcuts
For examples in other supported languages, see the Drive SDK documentation.
Opening shortcuts in Drive always launches the application that created them. Shortcuts can even be synchronized to the desktop. Opening a shortcut from the desktop will launch the application that created it in a new browser tab.
Shortcuts require special consideration when it comes to sharing and security. Since the actual content is not stored in Drive, applications are responsible for enforcing permissions and ensuring that only authorized users are allowed to read or update content. Follow these best practices when working with shortcuts:
files.get
userPermission
reader
commenter
Honoring permissions not only ensures the protection of user data, but also provides a consistent user experience and added value to Drive applications. Users should be able to safely share an item in Drive without worrying about the particular implementation details of the application that created it.
If you have any questions about shortcuts, don’t hesitate to ask us on our Stack Overflow tag, google-drive-sdk
Over the past few years we've seen lots of Apps Script adoption within the EDU community. Educators need lightweight systems that integrate with the Google Apps they already use. Empowered by a cloud-hosted and simple to use platform, non-programmers have been able to create powerful scripts that have a real impact on the lives of their students. In honor of World Teachers' Day we're highlighting some popular scripts educators have created and other materials teachers can use to get started.
Earlier this year we sat down with Andrew Stillman, Program Officer for Digital Instruction at New Visions for Public Schools and co-founder of youpd.org. We discussed about how he uses Apps Script to build solutions for the New York City school system. He's the author of many popular scripts in the Script Gallery, including formMule, doctopus, and autocrat, which he uses to create powerful systems that tie together Google Forms, Spreadsheets, Docs and GMail in a way that teachers and administrators can maintain and enhance.
Flubaroo is another popular script among teachers, as it extends the usability of Google Forms for online assignments. After students have submitted their responses this script scores their answers against an answer key, generates histograms of the class's performance, and sends out personalized emails to each student with their grades.
Even more exciting, however, is that teachers have been writing their own scripts to solve problems and make their lives easier. For example, Adelphi University professor Lee Stemkoski wrote a small script that he uses to populate a Google Calendar with the topics for each lecture he'll give during the semester. In just 30 lines of code he was able to complete a long, monotonous task with the click of a button.
Teachers looking to get a better idea of how Apps Script works and what it can be used for should watch our video Google Apps EDU Fireside Chat: An Introduction to Apps Script. In it we cover the basic functionality and use cases supported, and even do some live coding to show how easy it is to get started. More than 20 million students, faculty and staff worldwide use Google Apps for Education, so if you build something interesting and worth sharing, consider publishing to the Chrome Web Store.
Apps Script developers that wished to share their work with a larger audience have traditionally turned to the Script Gallery, which allows other users to copy and install the script into their own spreadsheets. While appropriate for custom functions and spreadsheet extensions, it didn't fit well when distributing more complex functionality and apps.
In this blog post we'll be highlighting a newer way to distribute your scripts: deploying them as a web app and publishing them to the Chrome Web Store. Compared to the Script Gallery, the Chrome Web Store has some distinct advantages for developers:
Looking through the Script Gallery we believe there are many scripts that would be a great fit for the Chrome Web Store and would benefit from the advantages listed above. Some aspects of a good candidate script are:
A great example of such a script is Gmail Meter, which was first launched in the Script Gallery but has since been published to Chrome Web Store. Now users can install and run the script without needing to create a spreadsheet, see script code, or set up triggers. It may take a little work to update a spreadsheet-based script to use the web app model, and some common tasks are:
Publishing to the Chrome Web Store only takes a few clicks, and we provide instructions for the process in our documentation. We hope that you are inspired to take your scripts to the next level, and if you have any questions along the way feel free to reach out to us on StackOverflow or Google+.
