Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Javascript Articles
Page 530 of 534
HTML5 and Amazon S3 Multi-Part uploads
Yes, it is possible to use the HTML 5 File API with the Amazon S3 multi-part upload feature. You would need a server backup as well as Amazon API keys.Amazon S3, a web service offered by Amazon Web Services provides storage through web services interfaces. Amazon launched S3 in 2007.Create multipart upload with Amazon API and send "key"(filename) and "upload id" back to the web page. For the multi-part, you need to send part data directly to Amazon S3 via the "part upload URL" using "date" and "auth header".
Read MoreWebsocket for binary transfer of data & decode with HTML5
Use base64 encode/ decode on client and server. All the web browsers with WebSockets have window.atob (base64 decode) and window.btoa (base64 encode). The WebSockets server has base64 libraries.To transfer binary data, you would be working with wsproxy included with no VNC that is a web based VNC client.The wsproxy is a WebSockets to generic TCP sockets proxy. The base64 encodes/decodes all traffic to/from the browser. Use it to connect from a WebSockets capable browser to any type of TCP port.
Read MoreHTML5 <audio> tag on Android for PhoneGap application
PhoneGap is a software development framework by Adobe System, which is used to develop mobile applications. PhoneGap produces apps for all popular mobile OS platforms such as iOS, Android, BlackBerry, and Windows Mobile OS etc.HTML5 Audio support is not consistent across different devices due to codec licensing issues and OS implementation. Forplaying MP3 file, handle by using PhoneGap's Media class that would provide reliable audio programming on all the platforms.To repload audio and polyphony or layering, you can use the LowLatencyAudio PhoneGap native plugin.
Read MoreHow to make the user login for an offline web app?
While logging in i.e. online, you need to first authenticate against the server and if it works, store the username and a hashed password in the database.If you can find the account in the database, then you need to generate a new hash, only if the user has changed the password since the last time he logged.You need to also authenticate against the local database. Log in using the online version of the app at least once.
Read MoreUsing FFMPEG with HTML5 for online video hosting
HTML5 enabled browsers to have a video element that you can use to play a video on your site. To let you know, flowplayer and other flash based video streaming players use the FLV format. It has the same encoding as H.264. FFMPEG can convert videos to FLV, feel free to work it with flowplayer. Use the flvtool2 for reading and writing FLV metadata from and to the file. Use the tools to create your videos and stream them through flowplayer.
Read MoreGet maximal GPS precision on mobile browser
Built-in browser for Android will not give you accurate GPS location for security reasons. Test it with different web browsers that would need permissions to get the accurate location from GPS when installed.After switching GPS off, the data is received with < 10 meters accuracy.Do not use Android Browser for websites, if you want to get GPS location with high accuracy.50 meters precision can be seen for Safari browser if tested for iPhone with wifi switched off. Yes, the accuracy is lesser.
Read MoreDifference between dragenter and dragover event in HTML5
dragenterThe dragenter event is used to determine whether the drop target is to accept the drop. If the drop is to be accepted, then this event has to be canceled.dragoverThe dragover event, which is used to determine what feedback is to be shown to the user. If the event is canceled, then the feedback (typically the cursor) is updated based on the dropEffect attribute's value.
Read MoreBackward compatibility with HTML5
HTML5 is designed, as much as possible, to be backward compatible with existing web browsers. New features build on existing features and allow you to provide fallback content for older browsers.It is suggested to detect support for individual HTML5 features using a few lines of JavaScript.The latest versions of Apple Safari, Google Chrome, Mozilla Firefox, and Opera all support many HTML5 features and Internet Explorer 9.0 will also have support for some HTML5 functionality.The mobile web browsers that come pre-installed on iPhones, iPads, and Android phones all have excellent support for HTML5.
Read MoreUpload directly to Amazon S3 using Plupload HTML5 runtime
Amazon S3 now supports cross-origin resource sharing so HTML5 uploads are now possible.Before it was not possible. Plupload can be directly uploaded to HTML5 by cross-origin resource sharing (CORS).With the help of CORS (Cross-origin resource sharing), rich client-side web applications can be created.It selectively allows cross-origin access to S3 resources with the help of which we can access Amazon.
Read MoreHTML5 getCurrentPosition almost always failing in PhoneGap on iOS
PhoneGap has geolocation which works well for iOS, however, in IOS6, getCurrentPosition fires a failure callback. After failure, the getcurrentPosition calls success or failure callbacks. To let PhoneGap works on IOS6, we need to set PhoneGap.plist to No.If it is set to yes then ios6 have memory problems. However, Apache Cardova can be used for this purpose for iOS. There are many bugs in an older version of Cardova, so it should be updated to Cardovanew version.
Read More