blob

I have a react native app that uses Firebase, firestore. for uploading images i am using "react-native-fetch-blob" to create a Blob. in the js file that I use to upload the file, my code look like this: const Blob = RNFetchBlob.polyfill.Blob const fs = RNFetchBlob.fs window.XMLHttpRequest = RNFetchBlob.polyfill.XMLHttpRequest window.Blob = Blob ** window.XMLHttpRequest = RNFetchBlob.polyfill.XMLHttpRequest ** because of this window.XMLHttpRequest my app is blocked and not getting any response from firebase(not catch / nothing => just passing thrue the code). if i removed this line i can read

One of a table's column is of BLOB datatype (Oracle 10g). We have a simple select query executed via iBatis to select the BLOB column and display it using Struts2 & JSP. The result tag in the iBatis xml file had the jdbctype as java.sql.Blob <result property="uploadContent" column="uploadcontent" jdbctype="Blob"/> Should we be mentioning any typeHandler class for Blob column ? Currently we are getting an error stating column type mismatch. Note: This column is selected and mapped into a java bean who has an attribute of type java.sql.Blob I think you cannot use native jdbctype for LOB types in

I tried to uplad a pdf file using java.sql.PreparedStatement to mysql Blob field using the following code. File inFile = new File("Path+BLOCK.pdf"); byte[] b = new byte[(int)inFile.length()]; PreparedStatement psmnt = (PreparedStatement) con.prepareStatement("INSERT INTO 2012DOC (SRNO,DOCUMENT) VALUES (?,?)" ); //con is java.sql.Connection object psmnt.setString(1, "1200021"); psmnt.setBytes(2, b); psmnt.executeUpdate(); This code executes without error and database shows blob content, but when I try to retrieve the file using the below code it gives a corrupt file which doesn't open.

i'm using that guide to detect blobs of a certain color. On that guide, it check for orange's blob and it use this values: int orange[3] = {200, 250, 10}; On the guide it says that this values represents the orange in HSV. I don't know how they calculate this values but i try to check for blue value converting from rgb to hsv but it doesn't work. What i have to detect is this color: Any ideas on how to determinate HSV values to detect colors? thanks!! For blue , it can be used as HSV values : [120,255,255] I calculated it from GIMP , an open-source image processing tool like Photoshop.

Hi,I am new to SQL and I wanted to store images in the database.I already created a column with blob data type and tried to execute the following statement as given here INSERT INTO `abc` (`img`) SELECT BulkColumn FROM OPENROWSET( Bulk 'C:\Users\adity\Desktop\New folder\a.png', SINGLE_BLOB) AS BLOB which gives error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '( Bulk C:\Users\name\Desktop\New folder\a.png , SINGLE_BLOB) AS BLOB' at line 4 I also tried following code as given here insert into table `abc`(