从文件读取字节到内存

Question

I am using bufio to append byte arrays to a file. When I use cat on it I get:

[176 0 0 0 4 0 0 0 1 0 0 0 57 12 127 47 4 0 0 0 1 0 0 0 215 136 47 0 64 0 0 0 2 0 0 0 57 0 97 0 53 0 52 0 100 0 98 0 99 0 52 0 98 0 100 0 100 0 49 0 54 0 99 0 49 0 97 0 49 0 57 0 56 0 48 0 52 0 55 0 53 0 49 0 100 0 49 0 49 0 51 0 99 0 52 0 52 0 98 0 24 0 0 0 2 0 0 0 83 0 111 0 109 0 101 0 32 0 99 0 108 0 105 0 101 0 110 0 116 0 0 0 36 0 0 0 2 0 0 0 83 0 111 0 109 0 101 0 32 0 111 0 116 0 104 0 101 0 114 0 32 0 112 0 97 0 114 0 116 0 110 0 101 0 114 0][176 0 0 0 4 0 0 0 1 0 0 0 4 162 127 47 4 0 0 0 1 0 0 0 215 136 47 0 64 0 0 0 2 0 0 0 57 0 97 0 53 0 52 0 100 0 98 0 99 0 52 0 98 0 100 0 100 0 49 0 54 0 99 0 49 0 97 0 49 0 57 0 56 0 48 0 52 0 55 0 53 0 49 0 100 0 49 0 49 0 51 0 99 0 52 0 52 0 98 0 24 0 0 0 2 0 0 0 83 0 111 0 109 0 101 0 32 0 99 0 108 0 105 0 101 0 110 0 116 0 0 0 36 0 0 0 2 0 0 0 83 0 111 0 109 0 101 0 32 0 111 0 116 0 104 0 101 0 114 0 32 0 112 0 97 0 114 0 116 0 110 0 101 0 114 0][176 0 0 0 4 0 0 0 1 0 0 0 35 200 127 47 4 0 0 0 1 0 0 0 215 136 47 0 64 0 0 0 2 0 0 0 57 0 97 0 53 0 52 0 100 0 98 0 99 0 52 0 98 0 100 0 100 0 49 0 54 0 99 0 49 0 97 0 49 0 57 0 56 0 48 0 52 0 55 0 53 0 49 0 100 0 49 0 49 0 51 0 99 0 52 0 52 0 98 0 24 0 0 0 2 0 0 0 83 0 111 0 109 0 101 0 32 0 99 0 108 0 105 0 101 0 110 0 116 0 0 0 36 0 0 0 2 0 0 0 83 0 111 0 109 0 101 0 32 0 111 0 116 0 104 0 101 0 114 0 32 0 112 0 97 0 114 0 116 0 110 0 101 0 114 0]

So arrays of bytes. Now I want to read the file into memory, so I use:

content, err := ioutil.ReadFile(filename)

But when I display the content variable I get a completely different output than the contents of the file (and one array instead of many). What's wrong?

Answer 1

You wrote it wrong to the file. Its human readable format, should be binary.

My guess you used something like fmt.Fprintln(file, byte_slice) or variants.

It must be fmt.Fprintf(file, "%s", byte_slice) or similar.

Please, show us code how you write to the file.