blob | 易学教程

Download Blob file from Website inside Android WebViewClient

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I have an HTML Web page with a button that triggers a POST request when the user clicks on. When the request is done, the following code is fired: window.open(fileUrl); Everything works great in the browser, but when implement that inside of a Webview Component, the new tab doesn't is opened. FYI: On my Android App, I have set the followings things: webview.getSettings().setJavaScriptEnabled(true); webview.getSettings().setSupportMultipleWindows(true); webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true); On the AndroidManifest.xml I have the following permissions: <uses

How can I upload an thumbnail image (blob) at the same time as an Entity into a datastore in google app engine?

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问题 I Just started using google app engine today, and I have fallen in love with endpoints. I made one very easily that will store an object in the datastore that just has a few string values. But I also want a small thumbnail image to go along with that datastore entity. I understand how to upload blobs from android using an HttpServlet. I was thinking of using the id of the datastore entity as the image's name in the blobstore, but I dont know how to connect the two events since I would upload

How to upload the Users profile pic and how to fetch that profile pic from another users device?

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问题 I have a requirement,Lets say there are 3-Users for my app. I want to add an image(Profile pic purpose) to each user so that this image can be visible to other two users who are using the same app. Just like whatsapp profile pics. So for this purpose I did the following things. Step 1 : Logged in as User1 then I added this code to upload image file. After I logged in with User1 credentials and I made Public property as YES while uploading file. NSData *imageData = UIImagePNGRepresentation(

How to use BLOB with JSON and PHP?

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问题 I have a remote database with MySQL, and I am storing photos of the users of my app on the database as a row of the database with LONGTEXT type. I transform the photos to a string with Base64. I connect to my remote database with JSON and PHP, because this, I have to use Base64, because as I know, JSON and PHP need to send strings on the parameters, and with Base64 I can transform the photo into a string. It works ok, but it's very slow. When I am loading a photo of 100 KB, it takes a lot of

php上传视频大文件

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理清思路：引入了两个概念：块（block）和片（chunk）。每个块由一到多个片组成，而一个资源则由一到多个块组成块是服务端的永久数据存储单位，片则只在分片上传过程中作为临时存储的单位。服务端会以约一个月为单位周期性的清除上传后未被合并为块的数据片实现过程：将文件分割，分片上传，然后合并前端核心code： var fileForm = document.getElementById("file"); var upstartBtn = document.getElementById('upstart'); var stopBtn = document.getElementById('stop'); var startBtn = document.getElementById('restart'); var rate = document.getElementById('rate'); var divlog = document.getElementById('divlog'); //--------------------------- const LENGTH = 1024 * 1024 * 1; var start = 0; var end = start + LENGTH; var blob; var blob_num = 1; var is_stop = 0 var

How add BLOB type in Doctrine 2 using Symfony 2

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问题 In Symfony 2 I generate a Bundle for storing any type of document into database, but I need the BLOB column type. Tnx to this question I add the class BlobType into Doctrine DBAL, but for use the new column type I had to change Doctrine\DBAL\Types\Type [...] const BLOB = 'blob'; [...] private static $_typesMap = array( [...], self::BLOB => 'Doctrine\DBAL\Types\BlobType', ); Doctrine\DBAL\Platforms\MySqlPlatform (maybe it was better if I had changed Doctrine\DBAL\Platforms\AbstractPlatform) [.

Java - SQLite Web Service Returning Blob

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问题 I have a Java web service that is querying a SQLite database that contains blob data. I'm returning sql statements so that consumers of the service can just insert/update/delete with out processing the data. My problem is when I get to the blob data, the sqlite-jdbc driver says that the getBlob function is not implemented. So my question is this doable? Is there a better driver or way to accomplish this task? Thanks! 回答1: SQLite supports BLOB datatype. Sqlitejdbc driver does not support the

Distinguish a simply connected figures?

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问题 So I have a binary matrix in Matlab. It is basically a blob (pixels of value 1) surrounded by a neutral background (value 0). I want to figure out whether this blob is simply connected or not. Figure below is a straightforward example. How can this be achieved? Notably I understand that every path in a pixelated image can be created by choosing from 4 adjacent elements (up, down, left, right) or 8 adjacent elements etc - it doesn't matter in this case. 回答1: Code %// Assuming bw1 is the input

How to export an image that is a blob in database from a jasper reports to excel?

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问题 In ireportDesigner 5.6.0, I am adding an image from database. When I add that image,in xml it is shown as java.lang.Object and I have changed it to java.awt.Image as in the image given below I have changed expression class to "java.awt.Image" one time and another time to "java.io.InputStream". Now when i click on "preview" tab image is coming and is perfect. Now the problem appears. When i integrated jrxml and jasper files to eclipse and on running the server, it is showing an error like "

Easiest way to convert a Blob into a byte array

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what is the easiest way to convert a Blob into a byte array?I am using MYSQL and i want to convert a Blob datatype into a byte array. Iam using java programming language:) the mySql blob class has the following function : blob.getBytes use it like this: //(assuming you have a ResultSet named RS) Blob blob = rs.getBlob("SomeDatabaseField"); int blobLength = (int) blob.length(); byte[] blobAsBytes = blob.getBytes(1, blobLength); //release the blob and free up memory. (since JDBC 4.0) blob.free(); The easiest way is this. byte[] bytes = rs.getBytes("my_field"); 来源： https://stackoverflow.com