新年到：Serverless帮你做贺卡-深蓝源码网

新年到，先祝大家新年快乐：

怎么样，上面的这个小贺卡还不错吧？其实这个是通过Serverless架构自动生成的，测试地址：

新年贺卡，全都鼠于你 - 自豪的采用腾讯云Serverless架构

核心代码，就是Python通过pillow依赖，复制粘贴各种图片：

# -*- coding: utf8 -*-

import qrcode, uuid, json, base64
from PIL import Image, ImageDraw, ImageFont


def return_msg(error, msg):
    return_data = {
        "uuid": str(uuid.uuid1()),
        "error": error,
        "message": msg
    }
    print(return_data)
    return return_data


def get_qrcode(url):
    qr = qrcode.QRCode(
        error_correction=qrcode.constants.ERROR_CORRECT_L,
        box_size=8,
        border=1,
    )

    # 传入数据
    qr.add_data(url)
    qr.make(fit=True)
    # 生成二维码
    img = qr.make_image()
    # 保存二维码
    img.save('/tmp/qrcode.png')
    return Image.open('/tmp/qrcode.png').convert("RGBA")


def get_input_str(input_str, font, draw, need_height=False):
    length = 0
    new_str = ""
    max_height = []
    for eve in input_str:
        width, height = draw.textsize(eve, font)
        max_height.append(height)
        length = length + width
        if length > 804 and eve != "\n":
            length = width
            new_str = new_str + "\n" + eve
        else:
            new_str = new_str + eve
    if need_height:
        if len(new_str.split("\n")) > 10:
            return False
        return (new_str, max(max_height) * len(new_str.split("\n")) if "\n" in new_str else max(max_height))
    else:
        return new_str


def do_watermark(temp_watermark_pic, watermark_pic_new_x, watermark_pic_new_y):
    for i in range(watermark_pic_new_x):
        for k in range(watermark_pic_new_y):
            color = temp_watermark_pic.getpixel((i, k))
            if color != (255, 255, 255, 0):
                color = color[:-1] + (40,)
                temp_watermark_pic.putpixel((i, k), color)
    return temp_watermark_pic


def main_handler(event, context):
    try:
        json_data = json.loads(event["body"])
        frame_file = "./base/frame/%s.png" % (json_data["frame"])
        title_file = "./base/word/%s.png" % (json_data["title"])
        watermark_file = "./base/others/%s.png" % (json_data["watermark"])
        font = ImageFont.truetype('./base/font/%s.ttf' % (json_data["font"]), 40)
        input_str = json_data["text"]
        from_str = json_data["from"]
        to_str = json_data["to"]
        symbol_file = "http://serverless.0duzhan.com/app/new_year_greeting_card/fu.html?id=%s" % (json_data["symbol"])
    except Exception as e:
        print(e)
        return return_msg(True, "参数获取失败")

    if len(from_str) > 20:
        return return_msg(True, "落款昵称不可超过20字符")
    if len(to_str) > 20:
        return return_msg(True, "被赠与人昵称不可超过20字符")
    if len(input_str) > 200:
        return return_msg(True, "祝福内容不可以超过200字")

    try:
        temp_base_pic = Image.new('RGBA', (954, 1348), (255, 255, 255))
        frame_pic = Image.open(frame_file).convert("RGBA").resize((954, 1348), Image.ANTIALIAS)
        title_pic = Image.open(title_file).convert("RGBA")
        watermark_pic = Image.open(watermark_file).convert("RGBA")
        title_pic_x, title_pic_y = title_pic.size
        title_pic_new_x = 310
        title_pic_new_y = int(title_pic_y * title_pic_new_x / title_pic_x)
        title_pic = title_pic.resize((title_pic_new_x, title_pic_new_y), Image.ANTIALIAS)
        watermark_pic_x, watermark_pic_y = watermark_pic.size
        watermark_pic_new_x = 800
        watermark_pic_new_y = int(watermark_pic_y * watermark_pic_new_x / watermark_pic_x)
        watermark_pic = watermark_pic.resize((watermark_pic_new_x, watermark_pic_new_y), Image.ANTIALIAS)
        temp_watermark_pic = Image.new('RGBA', (watermark_pic_new_x, watermark_pic_new_y), (255, 255, 255, 0))
        temp_watermark_pic.paste(watermark_pic, (0, 0), watermark_pic)
        temp_watermark_pic = do_watermark(temp_watermark_pic, watermark_pic_new_x, watermark_pic_new_y)
        temp_base_pic.paste(frame_pic, (0, 0), frame_pic)
        temp_base_pic.paste(title_pic, (320, 30), title_pic)
        temp_base_pic.paste(temp_watermark_pic, (77, int((1348 - int(watermark_pic_new_y)) / 2)), temp_watermark_pic)
        temp_base_pic.paste(get_qrcode(symbol_file),  (340, 950), get_qrcode(symbol_file))
        draw = ImageDraw.Draw(temp_base_pic)
        draw.text((75, 300), get_input_str(to_str + ":", font, draw), (0, 0, 0), font=font)
        temp_data = get_input_str(input_str, font, draw, True)
        if not temp_data:
            return return_msg(True, "不要有太多的换行哦")
        input_str, content_height = temp_data
        draw.text((75, 400), input_str, (0, 0, 0), font=font)
        length_data = 850
        for eve_ap in from_str:
            width, height = draw.textsize(eve_ap, font)
            length_data = length_data - width
        draw.text((length_data, content_height + 400), get_input_str(from_str, font, draw), (0, 0, 0), font=font)
        draw.text((415, 1240), get_input_str("扫码抽取新年福", font, draw), (0, 0, 0),
                  font=ImageFont.truetype('./base/font/01.ttf', 20))
        temp_base_pic.save("/tmp/test_output.png")
        with open("/tmp/test_output.png", "rb") as f:
            base64Data = str(base64.b64enco										

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