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python 将base64字符串还原为图片

时间:08-23来源:作者:点击数:

今天弄验证码的时候发现,验证码的图片的src竟然是下面的这么一个一串字符串,吓到,好像不可以http请求的,第一次见,就好尴尬,去网上搜索了一下,说是:

这是Data URI scheme。

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

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/jpeg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

重要的地方来了

其实逗号后面的那一串数据是图片的二进制的数据的base64进行加密的,所以要想得到图片,就必须进行解密。

以下是解密并且展示出来的图片:

 code = url.encode('utf-8').replace('data:image/jpeg;base64,','')
 #print code
 x = base64.b64decode(code)
 #print x
  #
 i = Image.open(StringIO(x))
 i.show()

这是还原为图片并且保存下来的:

imgdata=base64.b64decode(strs)  
file=open('1.jpg','wb')  
file.write(imgdata)  
file.close()  
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