blob

I have an odd problem, the function below is one I created based on what i found on the net about creating a Blob in the client on the fly with some binary data in (passed as an array) and being able to download that. This works brilliantly in Chrome, but doesn't do anything in Firefox - UNLESS I debug and step through the code. Yes, oddly, if I create a break point inside the function and step through it, the a.click() will bring up the download window! function downloadFile(filename, data) { var a = document.createElement('a'); a.style = "display: none"; var blob = new Blob(data, {type:

I have a DataURL from a canvas that shows my webcam. I turn this dataURL into a blob using Matt's answer from here: How to convert dataURL to file object in javascript? How do I convert this blob back into the same DataURL? I've spent a day researching this and I'm astouned this isn't documented better, unless I'm blind. EDIT: There is var urlCreator = window.URL || window.webkitURL; var imageUrl = urlCreator.createObjectURL(blob); but it only returns a really short URL that seems to point at a local file, but I need to send the webcam data over a network. Use my code to convert between

Hibernate映射主要是通过对象关系映射文件实现，对象关系映射文件把数据库中的实体(一般为二维表)映射到面向对象中的实体对象，把数据库中多个表之间的相互关系也反映到映射好的类中。以后，在Hibernate中对数据库的操作就直接转换为对这些实体对象的操作了。 1. 映射文件说明： 正确理解各个配置选项的含义是掌握映射文件的关键。映射文件可以对面向对象中的关联关系、继承关系和组合关系等各种关系进行配置。如： <!-- XML 文件的声明 --> <? xml version = "1.0" encoding = "utf-8" ?> <!-- hibernate DTD 文件的声明 --> <! DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" > <!-- 映射文件的根节点 --> < hibernate-mapping > <!-- 对象关系映射的开始： class 元素表示类和数据库中的表的映射关系。 name 属性指定持久化类（或者接口）的 Java 全限定名； table 属性指定要映射的对应的数据库表名 --> < class name =

We are capturing a raw binary string that is variable in size (from 100k to 800k) and we would like to store these individual strings. They do not need to be indexed (duh) and there will be no queries on the contents of the field. The quantity of these inserts will be very large (they are for archival purposes), let's say 10,000 per day. What is the best field type for large binary strings like these? Should it be text or blob or something else? As far as PostgreSQL is concerned, type text is out of the question. It is slower, uses more space and is more error-prone than bytea for the purpose.

I want to upload a large file of maximum size 10MB to my MySQL database. Using .htaccess I changed PHP's own file upload limit to "10485760" = 10MB. I am able to upload files up to 10MB without any problem. But I can not insert the file in the database if it is more that 1 MB in size. I am using file_get_contents to read all file data and pass it to the insert query as a string to be inserted into a LONGBLOB field. But files bigger than 1 MB are not added to the database, although I can use print_r($_FILES) to make sure that the file is uploaded correctly. Any help will be appreciated and I