The File Web Share Target API is a new, powerful feature in Chrome Canary that allows web apps to receive files (like images) shared from other apps, much like native apps. This post details how I implemented this API on my blog, enabling direct image uploads from my Android camera app. The process involves declaring support for file sharing in your web app manifest and handling the incoming file data in a service worker. The API uses a progressive approach, leveraging standard form POST requests, making integration relatively simple. This feature significantly enhances web app integration with the host operating system, closing the gap between web and native apps.
Chrome Dev and Canary (18+) now support Web Intents! Currently, intent registration is done via the Chrome apps manifest (not the intent tag) to allow the user agent to determine available services (including those on the local network or external native apps). The manifest entry specifies the supported action, data types, title, and path. Client-side code remains the same. Future support for declaring capabilities directly through HTML with the Intent tag is planned.
Hey everyone, I've been playing with the dev channel of Chrome and discovered something huge: background pages for web apps! This means your web app can now run even when the browser is closed, or even after system start-up. It's crazy powerful. You enable this by adding the "background" permission to your app manifest and then using a simple window.open() call with a special third parameter. The background page's state can be toggled with window.close(). Communication between the background page and your app is done using SharedWorkers. Oh, and Appmator now supports this too!
This post concludes the "Buzz This" Chrome Extension series by demonstrating how to add context menus. Context menus provide a powerful way to interact with users, letting them "Buzz" specific content like images or selected text, rather than the entire page. This is achieved by adding "contextMenus" to the permissions in the manifest file and then using chrome.contextMenus.create() in the background.html file. The create() method takes an object that defines the context menu's title, contexts (e.g., "page", "selection", "image", "link"), and an onclick event handler. The click handler determines the context of the click (selected text, image, link) and constructs the Buzz API URL accordingly. The code for the extension is available on GitHub.
This tutorial provides a step-by-step guide to building a basic Chrome extension for posting to Google Buzz. We start by setting up the manifest file with the extension's name, version, and browser action details like the icon and tooltip. Then, we introduce a background page to handle the extension's logic, adding an event listener to detect clicks on the browser action button. Initially, we demonstrate how to display the current URL, and then extend the functionality to open a new tab directed to Google Buzz, pre-filled with the current URL for posting. The tutorial concludes by adding the 'tabs' permission to the manifest for enabling tab creation. Future enhancements will include fetching Buzz stats for the current URL, demonstrating cross-domain requests and browser_action interaction.
