知识点主要参考来源

https://www.aimks.com/css-path-data-image-png-usage-base64.html

大家可能注意到了,网页上有些图片的src或css背景图片的url后面跟了一大串字符,比如:

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background-image:url(data:image/png;base64,
iVBORw0KGgoAAAANSUhEUgAAAAEAAAAkCAYAAABIdFAMAAAAGXR
FWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAHhJRE
FUeNo8zjsOxCAMBFB/KEAUFFR0Cbng3nQPw68ArZdAlOZppPFIB
hH5EAB8b+Tlt9MYQ6i1BuqFaq1CKSVcxZ2Acs6406KUgpt5/ 
LCKuVgz5BDCSb13ZO99ZOdcZGvt4mJjzMVKqcha68iIePB86G
AiOv8CDADlIUQBs7MD3wAAAABJRU5ErkJggg%3D%3D)

那么这是什么呢?这是Data URI scheme。

Data URI scheme是在RFC2397中定义的,目的是将一些小的数据,直接嵌入到网页中,从而不用再从外部文件载入。比如上面那串字符,其实是一张小图片,将这些字符复制黏贴到火狐的地址栏中并转到,就能看到它了,一张1X36的白灰png图片。

在上面的Data URI中,data表示取得数据的协定名称,image/png 是数据类型名称,base64 是数据的编码方法,逗号后面就是这个image/png文件base64编码后的数据。
目前,Data URI scheme支持的类型有:

data:,文本数据
data:text/plain,文本数据
data:text/html,HTML代码
data:text/html;base64,base64编码的HTML代码
data:text/css,CSS代码
data:text/css;base64,base64编码的CSS代码
data:text/javascript,Javascript代码
data:text/javascript;base64,base64编码的Javascript代码
data:image/gif;base64,base64编码的gif图片数据
data:image/png;base64,base64编码的png图片数据
data:image/jpeg;base64,base64编码的jpeg图片数据
data:image/x-icon;base64,base64编码的icon图片数据

base64简单地说,它把一些 8-bit 数据翻译成标准 ASCII 字符,网上有很多免费的base64 编码和解码的工具,在PHP中可以用函数base64_encode() 进行编码,如

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echo base64_encode(file_get_contents(‘wg.png’));

目前,IE8、Firfox、Chrome、Opera浏览器都支持这种小文件嵌入。
举个图片的例子:
网页中一张图片可以这样显示:

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<img src=“http://www.aimks.com/images/wg.png”/>

也可以这样显示:

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<img src=“data:image/png;base64,iVBORw0KGgoAAAANSUhEU
gAAAAEAAAAkCAYAAABIdFAMAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZS
BJbWFnZVJlYWR5ccllPAAAAHhJREFUeNo8zjsOxCAMBFB/KEAUFFR
0Cbng3nQPw68ArZdAlOZppPFIBhH5EAB8b+Tlt9MYQ6i1BuqFaq1C
KSVcxZ2Acs6406KUgpt5/LCKuVgz5BDCSb13ZO99ZOdcZGvt4mJjz
MVKqcha68iIePB86GAiOv8CDADlIUQBs7MD3wAAAABJRU5ErkJggg%3D%3D”/>

我们把图像文件的内容直接写在了HTML 文件中,这样做的好处是,节省了一个HTTP 请求。坏处呢,就是浏览器不会缓存这种图像。大家可以根据实际情况进行自由取舍。

看完前面的知识,从爬虫角度实战演练一下:

我们分析到这样的网站,

因为看源码是png样式,我们就知道他是图片:

代码如下:

import base64font_face = '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'
b = base64.b64decode(font_face)
with open('ceshi.png', 'wb') as f:f.write(b)

结果显示:

OK,学到了一个小知识点。

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