Write files to base64 stream
4.0
Written, designed to help you understand the process of file streams. Generate the base64 stream I write txt at the root of the document, the end of the document, add the length of the source file, so he's not exactly a base64 stream, but the file has a lot of help to you. My email address is heyuxistock@163.com, you don't understand, just give me a message.