There are two main options: Store the file on disk, and then store the path to the image in core data Store the binary data of the image in core data I personally prefer the 1st option, since it allows me to choose when I want to load the actual image in memory. It also … Read more
Blobs are “immutable” so you can’t change one after making it. Constructing a new Blob that appends the data to an existing blob (as you wrote in your initial question) is a good solution. If you don’t need to use the Blob each time you append a part, you can just track an array of … Read more
I’ve found. It was so simple that I didnt even see it… /** * @param {Blob} videoFile * @param {HTMLVideoElement} videoEl * @returns {void} */ function display( videoFile, videoEl ) { // Preconditions: if( !( videoFile instanceof Blob ) ) throw new Error( ‘`videoFile` must be a Blob or File object.’ ); // The `File` … Read more
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();
Blobs represent a bunch of data that could live anywhere. The File API specification intentionally does not offer any synchronous way of reading a Blob’s contents. Here are some concrete possibilities. When you create a Blob via the constructor and pass it in-memory data, like an Uint8Array, the Blob’s contents lives in memory, at least … Read more
Read: MySQL Binary Storage using BLOB VS OS File System: large files, large quantities, large problems To Do or Not to Do: Store Images in a Database which concludes If you on occasion need to retrieve an image and it has to be available on several different web servers. But I think that’s pretty much … Read more
Blobs are returned with file type from backend. The following function will accept any file type and popup download window: downloadFile(route: string, filename: string = null): void{ const baseUrl=”http://myserver/index.php/api”; const token = ‘my JWT’; const headers = new HttpHeaders().set(‘authorization’,’Bearer ‘+token); this.http.get(baseUrl + route,{headers, responseType: ‘blob’ as ‘json’}).subscribe( (response: any) =>{ let dataType = response.type; let … Read more
TEXT and CHAR will convert to/from the character set they have associated with time. BLOB and BINARY simply store bytes. BLOB is used for storing binary data while Text is used to store large string. BLOB values are treated as binary strings (byte strings). They have no character set, and sorting and comparison are based … Read more
I have often built systems to store images in the database, there are pros and cons to doing this. Pros: All your data is kept in one place, if you migrate your website/database the images will just be there Its easier to sort/delete/etc… Since you have to serve it via a PHP script, you can … Read more
You can read large blobs in pieces. First find out which ones need this treatment: SELECT id, length(blobcolumn) FROM mytable WHERE length(blobcolumn) > 1000000 and then read chunks with substr: SELECT substr(blobcolumn, 1, 1000000) FROM mytable WHERE id = 123 SELECT substr(blobcolumn, 1000001, 1000000) FROM mytable WHERE id = 123 … You could also compile … Read more