blob

convert BLOB to text in sql

我怕爱的太早我们不能终老 提交于 2019-12-06 03:57:15
I have a field in my database table with data type as BLOB .How can I view the content as text/string using a SELECT query in SQL . the content's MIMETYPE is 'text/xml charset=UTF8' I tried with this, I'm not sure if im right with the syntax SELECT CAST((SELECT column FROM myTable WHERE ID='56')AS CHAR(10000) CHARACTER SET utf8) and also SELECT CONVERT(VARCHAR(max), CAST((SELECT column FROM myTable WHERE ID='56') as binary)) from BIZDOCCONTENT many Thanks urbanspr1nter Try: SELECT CONVERT(object USING utf8) FROM tablename Try this query - SELECT CONVERT(column USING utf8) FROM myTable WHERE ID

How to post and retrieve blob with Django

人盡茶涼 提交于 2019-12-06 03:12:49
问题 I have a blob . It's an image that I resized using a <canvas> . I've verified that the data is correct by converting it to a url to test it as per the MDN guide. So far so good. Now, I'd like to post it to my Django server (along with some other inputs). So I do this: var fd = new FormData(form); canvas.toBlob( function(blob) { fd.set("image0", blob, "image0.jpg"); }, "image/jpeg", 0.7); var xhr = new XMLHttpRequest(); xhr.open('POST', '/ajax-upload/', true); xhr.setRequestHeader("X-CSRFToken

the first argument to execute must be a string or unicode query

血红的双手。 提交于 2019-12-06 03:02:50
I am trying to upload a blob data to ms-sql db, using pyodbc. And I get "the first arguement to execute must be a string or unicode query" error. The code is; file = pyodbc.Binary(open("some_pdf_file.pdf", "r").read()) cur.execute("insert into BlobDataForPDF(ObjectID, FileData, Extension) values ('1', " + file + ", '.PDF')") cur.commit() The first arguement, ObjectID, is sent as string. I dont see any problems but am I missing something? Use parameterized insert: file = pyodbc.Binary(open("some_pdf_file.pdf", "r").read()) sql = "insert into BlobDataForPDF(ObjectID, FileData, Extension) values

download file client-side chunk by chunk

倖福魔咒の 提交于 2019-12-06 02:32:44
问题 I'm using WebRTC to send a file to a connected peer, and I'm sending the file in chunks. However, I'm having trouble figuring out how to get the peer to save/download the file as it is streaming in, chunk by chunk. All the examples I've found online recommend doing something like this: // sender dataConnection.send({ 'file': file }); // receiver dataConnection.on('data', function(fileData) { var dataView = new Uint8Array(fileData); var dataBlob = new Blob([dataView]); var url = window.URL

How to release blobs with hibernate and spring @transactional?

有些话、适合烂在心里 提交于 2019-12-06 02:16:00
I have a project with Spring and Hibernate. In my implementation, there are multiple models where I have to read from a file and store it as a Blob. For this purpose, I have an abstract class defined with Blob as follows. All the model that need to store blobs extend this class. @MappedSuperclass public abstract class AbstractContentAwareBean { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "id") protected Long id; public AbstractContentAwareBean() {} @Lob @Column(name = "content", columnDefinition = "LONGBLOB") protected Blob content; public void setContent(Blob

在vue中导入导出excel文件

老子叫甜甜 提交于 2019-12-06 02:02:29
导出excel    1,首先创建两个文件:Blob.js和Export2Excel.js   Blob.js /* eslint-disable */ /* Blob.js*/ /*global self, unescape */ /*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true, plusplus: true */ /*! @source http://purl.eligrey.com/github/Blob.js/blob/master/Blob.js */ (function (view) { "use strict"; view.URL = view.URL || view.webkitURL; if (view.Blob && view.URL) { try { new Blob; return; } catch (e) { } } // Internally we use a BlobBuilder implementation to base Blob off of // in order to support older browsers that only have BlobBuilder var BlobBuilder = view

GAE: How to get the blob-image height

你离开我真会死。 提交于 2019-12-06 00:52:49
问题 Given is the follwing model on GAE: avatar = db.BlobProperty() By calling the image instance properties height or width (see documentation) with: height = profile.avatar.height the following error is thrown: AttributeError: 'Blob' object has no attribute 'height' PIL is installed. 回答1: If the image is stored in a BlobProperty, then the data is stored in the datastore, and if profile is your entity, then the height can be accessed as: from google.appengine.api import images height = images

XMLHttpRequest Status of 404 With Blob URL

孤人 提交于 2019-12-06 00:18:22
I'm trying to upload a blob URL generated by getUserMedia to the server. Someone else wanted to do the same thing , and that question has been answered. I am using the same code for the XHR request as the person who answered that question, but I'm getting a 404. I made a fiddle , and the same thing happens when you look at the console. I have a live example on my site as well , and the same thing happens. Here is the piece of code that needs some TLC: function XHR(){ var xhr = new XMLHttpRequest(); xhr.open('GET',record.src); //404 ??? xhr.responseType = 'blob'; xhr.onload = function(e) { if

Upload files using cakephp 3 and store it in a blob

浪尽此生 提交于 2019-12-05 23:15:07
I know that storing files in database is a little dirty, but I'm need to upload and store a file into a database BLOB and I haven't found any documentation about it and I haven't find any clue, so any help about it will be appreciated. Thanks in advance, David There is nothing special that you'd need to do, simply set the data that you want to store in the appropriate entity property (respectively array key), either as a string, or as a stream. BLOB columns will automatically be associated with the \Cake\Database\Type\BinaryType database type , where everything that is necessary for storing

How to download data in a blob field from database in django?

陌路散爱 提交于 2019-12-05 22:39:36
I have a table in which I have a blob column containing some data, how can i download the blob content in django? I tried the solution mentioned here but it didn't work for me def download_blob(request, id): contents = BlobModel.objects.get(id=id).blob_field response = HttpResponse(contents) response['Content-Disposition'] = 'attachment; filename=blob.bin' return response 来源: https://stackoverflow.com/questions/17923139/how-to-download-data-in-a-blob-field-from-database-in-django