文件头

常见文件头

png(apng): 89 50 4E 47 (‰PNG)
jpg: FF D8 FF E0 00 10 4A 46 49 46 (ÿØÿà..JFIF)
gif:47 49 46 (GIF)
bmp: 42 4D (BM)
bpg: 42 50 47 (BPG)
tiff: 49 49 2A 00
zip: 50 4B 03 04 (PK..)
7z: 37 7A BC AF 27 1C (7z¼¯'.)
rar: 52 61 72 21 (Rar!)
doc: D0 CF 11 E0
docx: 50 4B 03 04 (本质是xml文件压缩包)
wav: 52 49 46 46 (RIFF)
xml: 3C 3F 78 6D 6C (<?xml)
html: 68 74 6D 6C 3E (html>)