随机验证码 pillow
安装
pip3 install pillow
基本使用
import PIL
from PIL import Image
from PIL import ImageDraw, ImageFont
import random
1.创建图片
from PIL import Image img= Img.new(mode="RGB",size=(120.30),color=(255,255,255)) # 在图片查看器中打开 # img.show() # 保存在本地 with open('code.png','wb') as f: img.save(f,format='png')
2. 创建画笔,用于在图片上画任意内容
img = Image.new(mode='RGB', size=(120, 30), color=(255, 255, 255)) draw = ImageDraw.Draw(img, mode='RGB')
3. 画点
img = Image.new(mode='RGB', size=(120, 30), color=(255, 255, 255)) draw = ImageDraw.Draw(img, mode='RGB') # 第一个参数:表示坐标 # 第二个参数:表示颜色 draw.point([100, 100], fill="red") draw.point([300, 300], fill=(255, 255, 255))
4. 画线
img = Image.new(mode='RGB', size=(120, 30), color=(255, 255, 255)) draw = ImageDraw.Draw(img, mode='RGB') # 第一个参数:表示起始坐标和结束坐标 # 第二个参数:表示颜色 draw.line((100,100,100,300), fill='red') draw.line((100,100,300,100), fill=(255, 255, 255))
5. 画圆
img = Image.new(mode='RGB', size=(120, 30), color=(255, 255, 255)) draw = ImageDraw.Draw(img, mode='RGB') # 第一个参数:表示起始坐标和结束坐标(圆要画在其中间) # 第二个参数:表示开始角度 # 第三个参数:表示结束角度 # 第四个参数:表示颜色 draw.arc((100,100,300,300),0,90,fill="red")
6. 写文本
img = Image.new(mode='RGB', size=(120, 30), color=(255, 255, 255)) draw = ImageDraw.Draw(img, mode='RGB') # 第一个参数:表示起始坐标 # 第二个参数:表示写入内容 # 第三个参数:表示颜色 draw.text([0,0],'python',"red") # 如果想插入特殊的字体,查看7(下面代码)
7. 特殊字体文字
img = Image.new(mode='RGB', size=(120, 30), color=(255, 255, 255)) draw = ImageDraw.Draw(img, mode='RGB') # 第一个参数:表示字体文件路径 # 第二个参数:表示字体大小 font = ImageFont.truetype("kumo.ttf", 28) # 第一个参数:表示起始坐标 # 第二个参数:表示写入内容 # 第三个参数:表示颜色 # 第四个参数:表示颜色 draw.text([0, 0], 'python', "red", font=font)
图片验证码
import random def check_code(width=120, height=30, char_length=5, font_file='kumo.ttf', font_size=28): code = [] # 验证码具体内容 img = Image.new(mode='RGB', size=(width, height), color=(255, 255, 255)) draw = ImageDraw.Draw(img, mode='RGB') def rndChar(): """ 生成随机字母 :return: """ return chr(random.randint(65, 90)) def rndColor(): """ 生成随机颜色 :return: """ return (random.randint(0, 255), random.randint(10, 255), random.randint(64, 255)) # 写文字 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()) # 写干扰点 for i in range(40): draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor()) # 写干扰圆圈 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()) # 画干扰线 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)
# request.session["code"]=code # 把验证码写入session return img,''.join(code) if __name__ == '__main__': # 1. 直接打开 # img,code = check_code() # img.show() # 2. 写入文件 # img,code = check_code() # with open('code.png','wb') as f: # img.save(f,format='png') # 3. 写入内存(Python3) # from io import BytesIO # stream = BytesIO() # img.save(stream, 'png') # stream.getvalue() # 4. 写入内存(Python2) # import StringIO # stream = StringIO.StringIO() # img.save(stream, 'png') # stream.getvalue()
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
import PIL from PIL import Image from PIL import ImageDraw, ImageFont import random def get_valid_img(request): def get_random_color(): return (random.randint(0,255),random.randint(0,255),random.randint(0,255)) imgage = Image.new(mode="RGB", size=(120,30), color=(255, 255, 255)) draw=ImageDraw.Draw(imgage) font=ImageFont.truetype("blog/static/font/kumo.ttf",size=32) temp=[] for i in range(5): random_num=str(random.randint(0,9)) random_low_alpha=chr(random.randint(97,122)) random_upper_alpha=chr(random.randint(65,90)) random_char=random.choice([random_num,random_low_alpha,random_upper_alpha]) draw.text((12+i*12,0),random_char,get_random_color(),font=font) temp.append(random_char) from io import BytesIO f=BytesIO() imgage.save(f,"png") data=f.getvalue() f.close() valid_str="".join(temp) print("valid_str",valid_str) request.session["valid_str"]=valid_str return HttpResponse(data)
验证码刷新
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
// 验证码刷新 script $("#valid_img").click(function () { $(this)[0].src+="?" });