blob

问题 I am using BLOb support for inserting and reading from MySQl.(JDBC) I can do that,but when it reads,its only few kb's.I dont know why. here is the working code: import java.sql.*; import java.io.*; public class InsertAndRetrieveImage { public static void main(String[] args) throws SQLException, FileNotFoundException, IOException { int id=7; String connectionURL = "jdbc:mysql://127.0.0.1:3306/newdb";; Connection con=null; try{ Class.forName("com.mysql.jdbc.Driver"); con = DriverManager

问题 I have this code: function saveFile(str, part) { var textFileAsBlob = new Blob([str], {type:"text/plain"}); var fileNameToSaveAs = "Parsed audio - part "+part; var downloadLink = document.createElement("a"); downloadLink.download = fileNameToSaveAs; downloadLink.innerHTML = "Download File"; if (window.URL != null) { // Chrome allows the link to be clicked // without actually adding it to the DOM. downloadLink.href = window.URL.createObjectURL(textFileAsBlob); } downloadLink.click(); } It

问题 I tried to use xp_cmdshell with this BCP: 'BCP "SELECT TOP 1 Data FROM <FQDN> WHERE Name = ''<name>'' " queryout "C:\exportdir\export_data.dat" -T -n -S .\SQLEXPRESS' But I'm getting some extra data at the begining of the file buffer. I tested it twice and both files started with BB 67 B9 00 00 00 00 I'd like to get rid of this, I tried to replace the -N parameter both with -n and -w but no luck. 回答1: To do this you need to run the export with a format file that specifies a prefix length of 0

问题 I have a Javascript object which will consists of a non-cyclic object hierarchy with parameters and child objects. Some of these objects may hold binary data loaded from files or received via XHRs (not defined yet if Blob, ArrayBuffer or something else). Normally I would use JSON.stringify() to serialize it as JSON but how can I then specify that binary data will be base64 encoded? What binary data object (Blob, ArrayBuffer,...) would you recommend me then? EDIT: Other data formats than plain

问题 I would like to play a video locally (without uploading it to the server). I can do that in pure javascript and html5 like so: html: <video id="video1"></video> <input type="file" id="fileInput" multiple /> javascript with jQuery: var $video = $('#video1'); $video.prop('src', URL.createObjectURL($('#fileInput').get(0).files[0])); $video.get(0).play(); and it works. but with video.js with the following code: var myPlayer = videojs('video1').ready(function () { // ready var filename = URL

问题 I've got a few thousand blobs at Rackspace's Cloud Files which I need to update content type for. However, I can't figure out how I do that using the jclouds API. How can I go about to update metadata on an existing blob? 回答1: Assuming you have the whole set up running for your rackspace, using jclouds is easy: First initialize with the following details: BlobStoreContext context = ContextBuilder.newBuilder(provider) .credentials(username, apiKey) .buildView(BlobStoreContext.class); BlobStore

问题 I cannot update a BLOB field, but Insert works, see code below. My guess is that it has something to do with the problem of storing one BLOB value in lots of records, involving copying large data. In my case, I know that only one record will be updated, but Oracle might be of the opinion that potentially several records may need to be updated. With Insert, there is guaranteed only 1 record involved, but not always with Update. Now how do I get around this problem? NB: the ArtNr field in the

问题 I have the following ajax code that makes a POST request for a blob to the server,and prints the returned data. function upload(blob){ var formData = new FormData(); formData.append('file', blob); $.ajax({ url: "http://custom-url/record.php", type: 'POST', data: formData, contentType: false, processData: false, success: function(data) { console.log(data); } }); } How can I do the same thing in AngularJS? 回答1: Instead of appending the blob to FormData, it is more efficient to send the blob

问题 I have a Picture : public class Picture implements java.io.Serializable { private byte[] picEncoded; private String Name; //etc Is it's possible to move byte[] to another class without creating physically separated table in db? Do i need to use some inheritance strategy? edit Blob in separate entity: pojo : public class PictureBlob implements java.io.Serializable { private Integer pictureBlobId; private byte[] blob; hbm: : <class name="PictureBlob" table="PICTURE"> <id name="pictureBlobId"

问题 My problem is this: I have the potential for huge files being stored in a binary (image) field on SQL Server 2008 (> 1GB). If I return the entire binary using a regular select statement, the query takes more than a minute to return results to my .NET program and my client apps time out. What I'm looking for is TSQL code that will limit the size of the data returned (maybe 300mb), allowing me to iterate through the remaining chunks and prevent timeouts. This has to happen in the SQL query, not