一、需求：
判断当前浏览器是否为微信，是的话挑起微信支付，不是的话，显示二维码图片并提示用户到微信中打开
二、效果图：
三、代码实现：
1. 判断是否微信
# toolbox.py
from typing import Any
class UserAgent:
def __init__(self, user_agent: str = '', request: Any = None):
if request is not None:
try:
user_agent = request.headers.get('user-agent', '') # For Sanic
except AttributeError:
user_agent = request.META.get('HTTP_USER_AGENT', '') # Django
self.user_agent = user_agent
@property
def is_alipay(self) -> bool:
return "AlipayClient/" in self.user_agent
@property
def is_wechat(self) -> bool:
return "MicroMessenger/" in self.user_agent
@property
def is_qq(self) -> bool:
return " QQ/" in self.user_agent
@property
def scan_type(self) -> str:
if self.is_wechat or self.is_qq:
return "wechat"
if self.is_alipay:
return "alipay"
return "unknown"
2. 给图片加文字 （参考了这篇文章并做了一些修改：https://www.jb51.net/article/175078.htm）
# image_text.py
"""
给图片（如二维码）添上文字
Usage::
>>> from xxx import deco_image
>>> deco_image(image_path, text) # 替换旧图片
>>> deco_image(image_path, text, new_path, color='red') # 保留旧图片并指定文字颜色
"""
from pathlib import Path
from typing import Optional, Tuple, Union
from PIL import Image, ImageDraw, ImageFont # pip install pillow
TIP = "请用微信扫码支付\n或分享到微信中打开"
# 获取图片宽度
def get_img_width(fname) -> int:
return Image.open(fname).size[0]
# 获取图片高度
def get_img_height(fname) -> int:
return Image.open(fname).size[1]
# 给图片加文字
# 生成blank_img空白图片，加上文字之后生成新图片或覆盖旧图, 宽度为origin_img原始图片的宽度
MARGIN_LEFT, MARGIN_TOP = 50, 15
FONT_SIZE = 22
FONT_COLOR = "red"
def gen_text_img(
origin_img: Union[Path, str],
text: str,
img_path=None,
color=FONT_COLOR,
font_size: int = FONT_SIZE,
margin_left: int = MARGIN_LEFT,
margin_top: int = MARGIN_TOP,
blank_img=None,
font_path: Optional[str] = None,
show_img: bool = False,
) -> Union[Path, str]:
width = get_img_width(origin_img)
if blank_img is None:
blank_img = Path(f"/tmp/blank-{width}.png")
elif isinstance(blank_img, str):
blank_img = Path(blank_img)
if not blank_img.exists():
Image.new("RGB", (width, 70), (255, 255, 255)).save(blank_img)
im = Image.open(blank_img)
draw = ImageDraw.Draw(im)
if font_path is None:
# font_path = r"C:\Windows\Fonts\simsun.ttc"
# font_path = "/System/Library/Fonts/Supplemental/Songti.ttc"
font_path = "/usr/share/fonts/truetype/windows-font/Songti.ttc"
fnt = ImageFont.truetype(font_path, font_size)
draw.text((margin_left, margin_top), text, fill=color, font=fnt)
if img_path is None:
img_path = Path(origin_img)
img_path = img_path.with_name(f"{img_path.stem}-{len(text)}{img_path.suffix}")
im.save(img_path)
if show_img:
im.show()
return img_path
# 拼接图片，把上面生成的文字图片拼接到原图上面
# 生成一张宽度一致，高度为两张图片之和的空白长图
# 分别打开图片进行粘贴到空白长图里面
def join_imgs(text_img, origin_img, new_path=None) -> None:
w = get_img_width(text_img)
fh = get_img_height(text_img)
oh = get_img_height(origin_img)
blank_long_img = Image.new("RGBA", (w, fh + oh)) # 空白长图
font_img = Image.open(text_img).resize((w, fh), Image.ANTIALIAS)
blank_long_img.paste(font_img, (0, 0))
img1 = Image.open(origin_img).resize((w, oh), Image.ANTIALIAS)
blank_long_img.paste(img1, (0, fh))
if new_path is None:
new_path = origin_img
blank_long_img.save(new_path)
blank_long_img.show()
def deco_image(
fpath: Union[Path, str], # 图片路径
text: str = TIP, # 要添加的文字
new_path: Union[Path, str, None] = None, # 新图片要保存的路径（默认覆盖原图）
color: Union[str, Tuple[int, int, int]] = FONT_COLOR, # 文字颜色
font_size: int = FONT_SIZE, # 文字高度
margin_left: int = MARGIN_LEFT,
margin_top: int = MARGIN_TOP,
) -> None:
text_img = gen_text_img(
fpath,
text,
color=color,
font_size=font_size,
margin_left=margin_left,
margin_top=margin_top,
)
join_imgs(text_img, fpath)
3. 如果系统缺字体，那么需要去下载
sudo mkdir /usr/share/fonts/truetype/windows-font
sudo chmod 777 /usr/share/fonts/truetype/windows-font
cd /usr/share/fonts/truetype/windows-font
wget https://gitee.com/waketzheng/carstino/attach_files/703450/download/Songti.ttc # 该文件比较大，有66.9MB
4. 调起支付或生成图片
from pathlib import Path
from hashlib import md5
import qrcode # pip install qrcode
from sanic import Blueprint
from sanic.log import logger
from sanic.request import Request
from sanic.response import json
from .models import Order
from .image_text import deco_image
from .toolbox import UserAgent
from .utils import async_http_post, get_host
from .consts import URL_PREFIX, WX_PAY_URL
bp = Blueprint("epay", url_prefix=URL_PREFIX)
async def get_qf_mch(community):
pass
@bp.route("/pay-link", methods=["POST"])
async def pay_link(request: Request):
requires, data = ["bills", "total", "next"], request.json
logger.info(f"{request.url = } ; {request.json = }")
# 已经1分钟内生成过对应订单的，直接去支付
content = request.body + f"{datetime.now():%y%m%d%H%M%S}".encode()
body = md5(content).hexdigest()
if not (order := await Order.filter(body=body).first()):
order = await new_pay_order(origin, data, request, body)
mchid, mch_name = await get_qf_mch(order.community)
if mchid:
host = get_host(request.headers)
if not UserAgent(request=request).is_wechat:
# 故判断当前是否在微信里，如果不是就直接生成二维码
frontend_url = data["next"]
fpath = "payit/" + md5(frontend_url.encode()).hexdigest() + ".png"
if not (p := BASE_DIR / "media" / fpath).parent.exists():
p.parent.mkdir(parents=True)
qrcode.make(frontend_url).save(p)
deco_image(p)
img_url = host + URL_PREFIX + "/media/" + fpath
return json({"payUrl": img_url})
return json(qf_pay_it(mchid, mch_name, order, host=host))
url = WX_PAY_URL
if not (request_data := order.post_data).get("mch"):
request_data.update(mch=1) # 未配置支付的,先用1
res = await async_http_post(url, request_data)
try:
res_json = res.json()
except Exception as e:
logger.error(f"{e = }; {url = }; {order.post_data=}; {res.content = }")
return json(res_json)
到此这篇关于用Python给二维码图片添加提示文字的文章就介绍到这了,更多相关Python给二维码添加文字内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！
