blob

How can I display thumbnails from Blob data

由 对着背影说爱祢 提交于 2020-01-01 19:56:54
问题 I'm new to php and I'm trying to build a photo website. I've managed to get the upload function working properly (send as blob to database and displaying it using custom url). Now, I want to retrieve this blob data and automaticly make a thumbnail for it. Unfortunately I only see the canvas format with a black background with the width and height I specified. Can someone point me in the right direction? get_thumb_function.php: // db_connect include 'databaseconnection.php'; // get id $id = $

Yii2 Display image stored in BLOB database field

由 我只是一个虾纸丫 提交于 2020-01-01 18:23:13
问题 Greetings I need to display images stored in BLOB database fields in a LISTVIEW or similar widget from Yii2 I have the actionCreate that saves the image in table named honra as a BLOB public function actionCreate() { $model = new Honra(); if ($model->load(Yii::$app->request->post()) && $model->save()) { $file = UploadedFile::getInstance($model,'binaryfile'); $model->binaryfile=$file; return $this->redirect(['view', 'id' => $model->id]); } else { return $this->render('create', [ 'model' =>

Tipfy: How to display blob in template?

由 我们两清 提交于 2020-01-01 14:35:02
问题 Given is on gae using tipfy (python) the following model: greeting.avatar = db.Blob(avatar) What is the template-tag to display a blob (here image)? 回答1: In this case the blob is an an image, which is great. Just use images.get_serving_url(blob_key) and you're happy. I've used this function, and trust me, it is awesome for serving images. Just append =sxx to the url where xx is the pixel size you want. It automatically resizes the image and serves it. If the blob isn't an image, then you're

JavaScript save blob to localStorage

由 a 夏天 提交于 2020-01-01 09:56:30
问题 I am trying to save blob data (favicon) retrieved via AJAX, to localStorage . Code : var xhr = new XMLHttpRequest(); xhr.open('GET', 'http://g.etfv.co/http://www.google.com', true); xhr.responseType = "blob"; xhr.onload = function(e){ //Stringify blob... localStorage['icon'] = JSON.stringify(xhr.response); //reload the icon from storage var fr = new FileReader(); fr.onload = function(e) { document.getElementById("myicon").src = fr.result; } fr.readAsDataURL(JSON.parse(localStorage['icon']));

converting blob to an image stream and assign it to jLabel

由 我怕爱的太早我们不能终老 提交于 2020-01-01 06:35:13
问题 I am just trying to Convert a blob string which is in Database to Byte array and then after converting it convert to buffered Image and then assign it to a label Here's my code package ims.project; import java.sql.*; import javax.swing.*; import java.awt.*; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import javax.imageio.ImageIO; public class readingdata extends JFrame { readingdata() { JPanel pane = new JPanel(); JLabel label1 = new JLabel("help"); JLabel label2

Spring-data-jpa storing blob

由 风格不统一 提交于 2020-01-01 05:07:13
问题 What is "best" or canonical way to store entity with blob using spring-data-jpa? @Entity public class Entity { @Id private Long id; @Lob() private Blob blob; } public interface Repository extends CrudRepository<Entity, Long> { } 回答1: TL; DR You can see sample project on my github. The project shows how you stream data to/from database. Problem All advices about mapping the @Lob as byte[] defeats (IMO) the main advantage of blobs - streaming. With byte[] everything gets loaded in memory. May

git存储原理

由 放肆的年华 提交于 2020-01-01 04:32:42
一， git 中的存储分为四种对象分别是：commit对象，tag对象，tree对象，blob对象 commit对象：每个执行git commit 时都会产生； tag对象：执行git tag时会产生； tree对象：执行git commit时会产生一个顶级树对象，就是对应着目录 blob对象：具体存储数据的文件 git仓库中会又一个隐藏文件.git使用ls -a可以查看 其中有个objects文件夹存储的就是每个对象， 执行find .git/objects -type f 可以查看每个对象 这里包含了上述的四种对象。 使用git cat-file -p hash码，可以查看对象信息 可以看到这里包含了顶级树对象，上一次提交的commitId和其他信息。 可以一直使用git cat-file -p 直到看到了blob对象的内容。 二，git中存储对象是通过key，value形式的，key是通过内容hash的到的，value是具体的内容(zlib压缩的)，所以即使文件的文件名，位置改变了，还是不会产生新的blob对象。 大致结构如下图：类似树的结构 三，git中的每个分支其实就是一个引用，存储在.git/refs/ 下，这里存储着很多分支文件，内容就是最新一次提交的commitId，然后.git/HEAD下存储着当前的分支。 来源： CSDN 作者： 风语者QAQ 链接：

Successfully Saving base64 Image to Azure Blob storage but blob image always broken/small white box

由 不问归期 提交于 2020-01-01 03:45:11
问题 I have a image converted to base64 I am trying to upload to my azure blob storage using createBlockBlobFromText. self.blobServer.createBlockBlobFromText(containerName, fileName, baseStrChars, { contentSettings: { contentType: 'image/jpeg' } }, function(error, result, response) { if (error) { console.log(error); } console.log("result", result); console.log("response", response); }); My new jpeg image appears in blob storage container but when I go to the blob image URL I always get this. My

Load blob image data into QPixmap

由 吃可爱长大的小学妹 提交于 2020-01-01 03:12:12
问题 I am writing a program using PyQt4 for front-end GUI and this program accesses a back-end database (which can be either MySQL or SQLite). I need to store some image data in the database and below is the Python code I use to import image files (in JPEG format) to a blob data field in the database: def dump_image(imgfile): i = open(imgfile, 'rb') i.seek(0) w = i.read() i.close() return cPickle.dumps(w,1) blob = dump_image(imgfile) hex_str = blob.encode('hex') # x"%s"%hex_str will be the string

How do I display the full content of LOB column in Oracle SQL*Plus?

由 别等时光非礼了梦想. 提交于 2019-12-31 13:17:47
问题 When I try to display the contents of a LOB (large object) column in SQL*Plus, it is truncated. How do I display the whole thing? 回答1: SQL> set long 30000 SQL> show long long 30000 回答2: You may also need: SQL> set longchunksize 30000 Otherwise the LOB/CLOB will wrap. 来源： https://stackoverflow.com/questions/122772/how-do-i-display-the-full-content-of-lob-column-in-oracle-sqlplus
订阅 blob