Using html5 to build offline applications
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The document discusses features that enable building offline HTML5 applications, including the application cache, online/offline events, localStorage, Web SQL, and indexed databases. It provides details on how each feature works and its advantages/disadvantages for offline applications. The application cache allows offline browsing and caching of files to reduce server load. Online/offline events notify of cache status changes. localStorage provides simple key-value storage, while Web SQL and indexed databases support more complex data but with greater performance costs. The document recommends different features depending on data needs and browser support.
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Developing serverless applications with .NET on AWSWoody Pewitt This document discusses developing serverless applications with .NET on AWS. It introduces several AWS services including Lambda, CloudWatch, API Gateway, DynamoDB, CloudFormation, and S3. Demos are provided for creating Lambda functions, connecting Lambda to API Gateway, writing and reading from DynamoDB, deploying serverless templates with CloudFormation, and rendering static resources to S3. The document aims to demonstrate that .NET can be used with AWS serverless architecture with no issues.
Qcon sf - html5 cross-platform mobile solutions
Qcon sf - html5 cross-platform mobile solutionsWoody Pewitt This document discusses HTML5 as a cross-platform solution for mobile development. It notes that HTML5 allows developers to build apps that work across different device types and platforms using common web technologies like HTML, CSS and JavaScript. The document also advertises Telerik's tools, SDKs and emulators for HTML5 mobile development as well as their integrated cloud environment and monthly pricing plans.
Is your C# optimized
Is your C# optimizedWoody Pewitt This document discusses optimizing C# code for speed, maintainability, and flexibility. It provides tips for using profilers to optimize for speed, establishing coding standards to improve maintainability, and refactoring code. Exceptions, allocation in loops, string concatenation, and validating enum values are discussed as examples of code that could be optimized. Guidelines are provided around using exceptions, GC.Collect, and designing enums.
Technical debt
Technical debtWoody Pewitt This document discusses technical debt and provides examples of how it can arise. It defines technical debt as borrowing time against future work by taking shortcuts now. This can occur when requirements change and code needs to be refactored, or when non-core functionality is developed in-house rather than using existing third party tools. The document provides formulas to quantify technical debt and outlines strategies to reduce it such as refactoring, writing less fragile tests, and buying in components rather than recreating functionality.
From port 80 to applications
From port 80 to applicationsWoody Pewitt This document provides an overview of how the web developed from early packet-switched networks and protocols in the 1960s to modern web applications. It discusses the layers of the Internet Protocol Suite including application, transport, internet, and link layers. Key components that enable the web are explained such as HTTP, web servers, browsers, and how requests are processed. The document also introduces ASP.NET and the model-view-controller (MVC) framework for building web applications.
Technical Debt
Technical DebtWoody Pewitt This document discusses the concept of technical debt in software development. It defines technical debt as borrowing time now by taking shortcuts or not using best practices, which must then be paid back later through extra work. Several examples of technical debt anti-patterns are provided, such as not using an external library and instead developing a component internally. The document also provides methods for quantifying the cost of technical debt and strategies for identifying and fixing technical debt through code metrics and refactoring.
Mobile Web Best Practices
Mobile Web Best PracticesWoody Pewitt The document provides guidelines and best practices for developing mobile web content, including:
- Start with a lowest common denominator approach using simple XHTML and stylesheets to ensure broad compatibility. Then build apps optimized for specific devices.
- Keep pages small by minimizing images, stylesheets, and file sizes. Guide user input and provide defaults to reduce keystrokes.
- Consider content adaptation strategies like redirection to mobile-optimized sites, or serving the same content with reformatting. Unification allowing shared bookmarks is the ideal approach.
- Resources and tools are recommended to test mobile web pages and emulate different devices.
Internet protocalls & WCF/DReAM
Internet protocalls & WCF/DReAMWoody Pewitt This document discusses various web service technologies including RSS, ATOM, JSON, SOAP, and REST. RSS and ATOM are formats for syndicating web content using XML. JSON is a lightweight data format inspired by JavaScript. SOAP defines an envelope for XML messaging, while REST uses HTTP methods to manipulate resources on a server. REST embraces HTTP and models services as resources with unique identifiers accessed via standard methods like GET and PUT.
How To Create Web Sites For Mobile Clients
How To Create Web Sites For Mobile ClientsWoody Pewitt This document discusses how to create websites for mobile clients using .NET 4.0. It covers key topics like content adaptation strategies, optimizing navigation and input, keeping pages small and lightweight, and minimizing network usage. Resources and tools are also provided to help test mobile websites, including validators, emulators and proxies. The goal is to design sites that are optimized for small screens and the unique constraints of mobile browsing.
.Net Garbage Collector 101
.Net Garbage Collector 101Woody Pewitt The document discusses .NET garbage collection. It explains that concurrent garbage collection is used in desktop applications while synchronous collection is used by default in server applications like ASP.NET. It notes the benefits of garbage collection, but also issues to watch out for like too many allocations, strings, and almost long-lived objects. It discusses how to avoid issues with strings, finalization, the Dispose pattern, weak references, and when to induce collections.
San Diego ASP.NET Meeting Oct 21st
San Diego ASP.NET Meeting Oct 21stWoody Pewitt Visual Studio 2010 introduces numerous enhancements across its various features, including improved debugging, multi-core development support, and enhanced web extensibility. Key updates include new tools for testing, UML modeling, and IntelliTrace, alongside support for multiple programming languages like C# and Visual Basic. The platform also integrates options for web deployment and offers extensibility through an improved editor and online gallery.
San Diego Clound Computing Sep 9th
San Diego Clound Computing Sep 9thWoody Pewitt The document discusses Microsoft's Azure cloud computing platform and its focus on providing users and developers choice in how they build and deploy applications. Key points discussed include Azure's support for virtualization, cloud services, and allowing workloads to run on-premises or in the cloud. The platform aims to empower users with control and access across devices while providing developers tools and services to build applications on Azure or integrate their own clouds and services.
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Using html5 to build offline applications
- 1. Using HTML5 to Build Offline Applications Woody Pewitt Icenium Evangelist @woodyp [email protected]
- 2. Features that make HTML5 offline web apps a reality • Application cache • Online/Offline events • localStorage • Web SQL & indexed database
- 3. Application cache • Offline browsing • Speed • Reduced server load
- 4. App Cache Via. Cache Manifest CACHE MANIFEST # version 0.4 # Files to cache <html manifest="demo.manifest"> ... CACHE: </html> favicon.ico index.html onlinedemo.html fallback.html Content/jquery.mobile-1.1.1.min.css Scripts/jquery-1.6.4.min.js Scripts/jquery.mobile-1.1.1.js Content/images/ajax-loader.gif Manifest file must be served Content/images/icons-18-white.png with the mime-type “text/cache-manifest” NETWORK: * FALLBACK: http://manifest-validator.com/ *.html fallback.html
- 5. Online/Offline events • checking • Fired once when the app reads the manifest file to see if it has changed. • noupdate • The manifest file has not changed. • downloading • Files are being downloaded • progress • Fired once per each file downloaded. If you have 15 files, you’ll see 15 progress events. Unfortunately, the event itself doesn’t contain information about which file just completed, so it’s fairly limited in its current form. • cached • Files have finished downloading. • updateready • A new copy of the cache is ready to be swapped in. • obsolete • The manifest file is code 404 or code 410; the application cache for the site has been deleted. • error • An error occurred when loading the manifest, its parent page, or a listed resource, or the manifest file changed while the update was running. The cache update has been aborted.
- 6. LocalStorage • Web Storage • Provides a simple key-value mapping • Web SQL Database • Gives you all the power - and effort - of a structured SQL relational database • IndexedDB • Like Web Storage, it's a straightforward key-value mapping, but it supports indexes • File Access • An API for reading file content in JavaScript
- 7. Web Storage • localStorage & sessionStorage • Supported on all modern browsers • Simple API & usage • Semantic events available • Poor performance with large/complex data • searching, storing and retrieving
- 8. Web SQL Database • Supported on major mobile browsers • Android Browser, Mobile Safari, Opera Mobile & several desktop browsers • Good performance generally • Asynchronous API (Synchronous API is also available for WebWorkers.) • Good search performance • Robust • Supports a transactional database model • Easier to maintain integrity of data, due to rigid data structure.
- 9. IndexedDB • Arisen from experiences with both Web Storage & Web SQL Database • Can be seen as an attempt to combine their strengths without incurring their weaknesses • Asynchronous API • Indexes
- 10. File Access • Can store large content and binary files • images, audio, video, PDFs, etc. • Good performance • Asynchronous API • Very early standard • No transaction support • No built-in search/indexing support
- 11. ResourcesReferences • http://www.html5rocks.com/en/features/offline • http://www.html5rocks.com/en/mobile/workingoffthegrid/ • http://www.alistapart.com/articles/application-cache-is-a- douchebag/