一、總體思路
1、獲取字體文件
2、base64解密文件分別保存為woff文件與xml文件
3、查看映射關(guān)系創(chuàng)建映射字典
4、通過映射字典，第二次獲取響應(yīng)時替換成實際數(shù)據(jù)
二、解析過程
image.png
1、獲取字體文件
在開發(fā)者工具中查找"font-face"，如圖所示
image.png
獲取到base64字符串并刪除頭部信息，在這里就是data:application/font-ttf;charset=utf-8;base64, 逗號也要刪除，這樣就獲取到了字體信息，這一段密文就是加密后的字體文件
T1RUTwAJAIAAAwAQQ0ZGICGSe1oAAATUAAAEd09TLzJlNl+eAAABAAAAAGBjbWFwACoGOwAABAQAAACwaGVhZBf2b3IAAACcAAAANmhoZWEA3wBNAAAA1AAAACRobXR4B/AAAAAACUwAAAAkbWF4cAAJUAAAAAD4AAAABm5hbWUKXYQxAAABYAAAAqNwb3N0AAMAAAAABLQAAAAgAAEAAAABAACCl4DfXw889QADAQAAAAAA3DAYYwAAAADcMBhjAAf//wB4ALUAAAADAAIAAAAAAAAAAQAAAN3/xQAAAH4AAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAkAAFAAAAkAAAADAH4B9AAFAAACigK7AAAAjAKKArsAAAHfADEBAgAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAACBYWFhYAEAATgBVAN3/xQAAALUAAQAAAAEAAAAAAG8AtQAAAAAAAAAAACIBngABAAAAAAAAAAEAQgABAAAAAAABAAwAAAABAAAAAAACAAYAJAABAAAAAAADABUAxgABAAAAAAAEABMANgABAAAAAAAFAAsApQABAAAAAAAGABIAbwABAAAAAAAHAAEAQgABAAAAAAAIAAEAQgABAAAAAAAJAAEAQgABAAAAAAAKAAEAQgABAAAAAAALAAEAQgABAAAAAAAMAAEAQgABAAAAAAANAAEAQgABAAAAAAAOAAEAQgABAAAAAAAQAAwAAAABAAAAAAARAAYAJAADAAEECQAAAAIAYQADAAEECQABABgADAADAAEECQACAAwAKgADAAEECQADACoA2wADAAEECQAEACYASQADAAEECQAFABYAsAADAAEECQAGACQAgQADAAEECQAHAAIAYQADAAEECQAIAAIAYQADAAEECQAJAAIAYQADAAEECQAKAAIAYQADAAEECQALAAIAYQADAAEECQAMAAIAYQADAAEECQANAAIAYQADAAEECQAOAAIAYQADAAEECQAQABgADAADAAEECQARAAwAKk9wZW5UeXBlU2FucwBPAHAAZQBuAFQAeQBwAGUAUwBhAG4Ac01lZGl1bQBNAGUAZABpAHUAbU9wZW5UeXBlU2FucyBNZWRpdW0ATwBwAGUAbgBUAHkAcABlAFMAYQBuAHMAIABNAGUAZABpAHUAbU9wZW5UeXBlU2Fuc01lZGl1bQBPAHAAZQBuAFQAeQBwAGUAUwBhAG4AcwBNAGUAZABpAHUAbVZlcnNpb24gMC4xAFYAZQByAHMAaQBvAG4AIAAwAC4AMSA6T3BlblR5cGVTYW5zIE1lZGl1bQAgADoATwBwAGUAbgBUAHkAcABlAFMAYQBuAHMAIABNAGUAZABpAHUAbQAAAAACAAMAAQAAABQAAwAKAAAANAAEACAAAAAEAAQAAQAAAAD//wAAAAD//wAAAAEAAAAAAAwAAAAAAHwAAAAAAAAACQAAAAAAAAAAAAAAAAABAE4AAQBOAAAAAQABAE8AAQBPAAAAAgABAFAAAQBQAAAAAwABAFEAAQBRAAAABAABAFIAAQBSAAAABQABAFMAAQBTAAAABgABAFQAAQBUAAAABwABAFUAAQBVAAAACAADAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAEAQABAQETT3BlblR5cGVTYW5zTWVkaXVtAAEBAT/4GwD4HAL4HQP4HgSLivdx9xIFHQAAAOAPHQAAAPERix0AAAR3Eh4KADkGJf8eDx4PHgoAOQYl/x4PHg8MBwAMAQEMHysxOUFJUVlhaXFWZXJzaW9uIDAuMU9wZW5UeXBlU2FucyBNZWRpdW1PcGVuVHlwZVNhbnNNZWRpdW11bmkxMDA0ZXVuaTEwMDRmdW5pMTAwNTB1bmkxMDA1MXVuaTEwMDUydW5pMTAwNTN1bmkxMDA1NHVuaTEwMDU1AAAAAYsBjAGNAY4BjwGQAZEBkgAJAgABAAQASwDFAXIBzAH6AmoDDANw+pQO9xLtjhVHiwWLkgWbiwWQi46Oi5IIi4sFi/caBYuRiY2GiAiLiwV7gwWIkwWyoQWShwWL+zEFi4SOiJCLCIuLBZuLBYuEBQ73Eu33MBVQiwWDZwW9jKR2jGEIi4sFiGZ1d2GICIuLBXeLgZCKlAiLiwWLk46PkosIi4sFkIyRiJOECIuLBZOGkYiOiwiLiwWcjJSZjKUIi4sFjat3mmGKCIuLBYiLio2LjgiLiwWa2AXViwWHewWLiImJiIsIi4sFDvcSwd4Vi4sFe4CDfox8CIuLBYx0ln+gigiLiwWejZWWjJ4Ii4sFi5p9mnCaCJM3FYuLBWyNepmIpAiLiwWKnZacopoIi4sFdpmBm4ydCIuLBY2mmpmojQiLiwWmiZp+jXMIi4sFjHuBfXZ+CIuLBaZ8mHmKdQiLiwWKbnp8aooIcPcoFYuLBYp9lX2gfQiLiwWal5OYi5kIi4sFip2BlXiMCIuLBXyKg4KKewgO9xLK90EVi4sFdoyAb4tTCIuLBYpRlm+hjQiLiwWhipanisQIi4sFi8OAp3aKCIuTFYuLBayHnm2QUgiLiwWIUnhtaIgIi4sFaI14qYnGCIuLBY/EnqmsjggO9xKW90UV8IsFi4UFVvtABXaLBb/3MQVTiwWFjIiIioUIi4sFhHUFhYsFi74FDvcSmooVi4sFiZIFtpqkpJKuCIuLBYCAf4V+iwiLiwVwjnydiawIi4sFjLScoKyMCIuLBa6KnXKMWgiLiwWLUGpnSX8I1uoVi4sFjcCBpXWKCIuLBXiLgnuLawiLiwWKapV7oIwIi4sFloyUkZOWCA73ErLfFYuLBYmTBaeVmZqKngiLiwWLm4STfosIi4sFfIx9gX53CIuLBYWOBZaqnJuijAiLiwWliph/jHMIi4sFi3yCfnp/CIuLBaSIl3yLcQiLiwWJZHN3XIkIi4sFeYyCkIqUCIuLBYySjo+RjAiLiwWOi5CIkoYIi4sFioyMi42KCIuLBZKGkYmQiwiLiwWejpWZjaQIi4sFjqp6lmaDCA73EvXDFZGLBYtWBSOLBYuSBbrCBZyfk6CLogiLiwWLoIOVeosIi4sFfIx+f39zCIuLBYSNBZSvnZ2liwiLiwWniZp7jG0Ii4sFjHmAdnRyCIuLBWRfBb+LBZaKkpWOoQiLiwUOAAQAAAAAfgAAAH4AAAB+AAAAfgAAAH4AAAB+AAAAfgAAAH4AAA==
進(jìn)行base64解碼（為什么是bs64呢，因為font-face中標(biāo)明了是base64）并分別保存為woff文件與xml文件
# base64解密
font_content = base64.b64decode(base64_str)
# TTFont打開從內(nèi)存讀取的二進(jìn)制woff數(shù)據(jù)
font = TTFont(io.BytesIO(font_content))
# 將woff文件轉(zhuǎn)換為xml文件
font.save('ts.woff')
font.saveXML('ts.xml')
使用Fontcreator打開woff文件，就可以看到字形與實際字體的對應(yīng)關(guān)系，也就是映射
image.png
這就知道了結(jié)果，然后打開xml文件，通過結(jié)果查找映射關(guān)系就事半功倍了。
image.png
至于創(chuàng)建映射字典和替換數(shù)據(jù)都是體力活了，就不一一介紹了。
