How to send a big file(audio or video) to server from android application right?

Question

Java

Let's say we have a server in php and a client in Java. I need the user to be able to send a file larger than 50 mb to the server via service, but in such a way that if the phone turns off or the Internet is temporarily unavailable, the download will pause and start from the same place. Plus, a description will be sent along with this file and everything will be saved together in the MySQL database. That is, I need to implement sending files to the server in the same way as implemented in Instagram or YouTube. But I have never done this before and I don’t know where to start and what is needed for this.

Answer 1

Adult developers use headers. Nobody restricts you from using the Content-Range header in a request.
I'm sorry, let me use the httpie syntax.
POST "/upload/"
Content-Type:[MEDIA_TYPE]
Content-MD5:[BASE64_MD5_FILE]
Content-Range: bytes [FROM_BYTES]-[TO_BYTES]/[FILE_SIZE]
[email protected]
One endpoint. Without boilerplate from three different requests.
bytes 0-? : creates a file, I would recommend creating with the name md5;
bytes? -? : write to file
bytes ? - total_size : write to file, checksum check, rename.
Chunk size = channel width >> 1

Answer 2

Implement the following api
/api/continuousupload - accepts multipart/form-data
/api/continuousuploadcreate - creates a long upload on the server
/api/continuousuploadinfo - sends information by chunk
On the client
1. /api/continuousuploadcreate - create an upload server returns id
2. beat send the file into chunks, let it be 2 megabytes each, via /api/continuousupload
3. the server writes the position of the pointer in the meta file and writes the byte stream received from /api/continuousupload
4. When the connection is broken, the server sends exactly the recorded data via /api/continuousuploadinfo the client sends the chunk starting from the position
Accordingly, both the server and the client need to calculate checksums during transmission.