2022暑期實踐（Django教程學習記錄）（第四周5）P55圖片驗證碼（顯示）

P55圖片驗證碼
python安裝pillow模塊操作圖片：pip install pillow

測試pillow

# 博客園詳細操作鏈接
# https://www.cnblogs.com/wupeiqi/articles/5812291.html
from PIL import Image, ImageDraw, ImageFont
img = Image.new(mode="RGB", size=(120, 30), color=(255, 255, 2555))
draw = ImageDraw.Draw(img, mode='RGB')
font = ImageFont.truetype("Monaco.ttf", 20)
draw.text([0, 0], 'pyhton', 'red', font)
with open('code.png', 'wb') as f:
img.save(f, format="png")

生成驗證碼：

import random
from PIL import Image, ImageDraw, ImageFont, ImageFilter
def check_code(width=120, height=30, char_length=5, font_file='kumo.ttf', font_size=28):
code = []
img = Image.new(mode='RGB', size=(width, height), color=(255, 255, 255))
draw = ImageDraw.Draw(img, mode='RGB')
def rndChar():
""" 生成隨機字母 :return: """
return chr(random.randint(65, 90))
def rndColor():
""" 生成隨機顏色 :return: """
return (random.randint(0, 255), random.randint(10, 255), random.randint(64, 255))
# 寫文字
font = ImageFont.truetype(font_file, font_size)
for i in range(char_length):
char = rndChar()
code.append(char)
h = random.randint(0, 4)
draw.text([i * width / char_length, h], char, font=font, fill=rndColor())
# 寫干擾點
for i in range(40):
draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())
# 寫干擾圓圈
for i in range(40):
draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())
x = random.randint(0, width)
y = random.randint(0, height)
draw.arc((x, y, x + 4, y + 4), 0, 90, fill=rndColor())
# 畫干擾線
for i in range(5):
x1 = random.randint(0, width)
y1 = random.randint(0, height)
x2 = random.randint(0, width)
y2 = random.randint(0, height)
draw.line((x1, y1, x2, y2), fill=rndColor())
img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)
return img, ''.join(code)
if __name__ == '__main__':
# pass
img, code_str = check_code()
print(code_str)
with open('code.png', 'wb') as f:
img.save(f, format="png")
# 1. 直接打開
# img,code = check_code()
# img.show()
# 2. 寫入文件
# img,code = check_code()
# with open('code.png','wb') as f:
# img.save(f,format='png')
# 3. 寫入內存(Python3)
# from io import BytesIO
# stream = BytesIO()
# img.save(stream, 'png')
# stream.getvalue()
# 4. 寫入內存（Python2）
# import StringIO
# stream = StringIO.StringIO()
# img.save(stream, 'png')
# stream.getvalue()

具體實例，利用內存對象直接返回給前端

def image_code(request):
from app03_phone_number_management.utils.code import check_code
img, code_string = check_code()
print(code_string)
from io import BytesIO
stream = BytesIO()
img.save(stream, 'png')
return HttpResponse(stream.getvalue())