关于Selenium的截图问题

截图方法

Broswer.get(url = 'https://www.baidu.com/')
Broswer.get_screenshot_as_file('.\img\\001.png')#必须以png结尾
Broswer.save_screenshot('.\img\\baidu.png')#必须以png结尾

源码

def save_screenshot(self, filename):
"""
Saves a screenshot of the current window to a PNG image file. Returns
False if there is any IOError, else returns True. Use full paths in
your filename.

:Args:
- filename: The full path you wish to save your screenshot to. This
should end with a `.png` extension.

:Usage:
driver.save_screenshot('/Screenshots/foo.png')
"""
return self.get_screenshot_as_file(filename)

def get_screenshot_as_file(self, filename):
"""
Saves a screenshot of the current window to a PNG image file. Returns
False if there is any IOError, else returns True. Use full paths in
your filename.

:Args:
- filename: The full path you wish to save your screenshot to. This
should end with a `.png` extension.

:Usage:
driver.get_screenshot_as_file('/Screenshots/foo.png')
"""
if not filename.lower().endswith('.png'):
warnings.warn("name used for saved screenshot does not match file "
"type. It should end with a `.png` extension", UserWarning)
png = self.get_screenshot_as_png()
try:
with open(filename, 'wb') as f:
f.write(png)
except IOError:
return False
finally:
del png
return True

从源码中我们可以看出，

save_screenshot

get_screenshot_as_file

note

png

warning

截图格式设置

#Gets the screenshot of the current window as a binary data.
Broswer.get_screenshot_as_png()

# Gets the screenshot of the current window as a base64 encoded stringwhich is useful in embedded images in HTML.
Broswer.get_screenshot_as_base64()

两种方式是对截图存储格式进行设置，分别是二进制格式和base64编码格式存储。

官方解释为什么以base64编码格式存储？

以base64编码的字符串的形式获取当前窗口的屏幕截图，这在HTML中的嵌入图像中非常有用。

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