python：文件转二维码（拆分转换）

文件转二维码时，考虑到二维码存储内容有限，可以使用拆分成多个二维码的的方案

方案详细流程

1. 将原始文件使用最高压缩率bz2 进行压缩

2. 将压缩文件转成base64

3. 将base64 进行拆分，拆分内容中拼上序号

4. 将上方base64及序号内容转二维码

5. 存储二维码

话不多数，直接上代码

import base64
import os

import qrcode
from PIL import Image, ImageDraw, ImageFont
from pyzbar import pyzbar

# 文件转 base64
def fileToBase64(filePath):
    base64Text = ''
    with open(filePath, 'rb') as f1:

        base64Data = base64.b64encode(f1.read())  # base64类型
        #  b'JVBERi0xLjUNCiXi48
        base64Text = base64Data.decode('utf-8')  # str
        # JVBERi0xLjUNCiXi48/

    return base64Text

def base64ToFile(base64Data, filePath):

    with open(filePath, 'wb') as f1:

        fileBytes = base64.b64decode(base64Data)

        f1.write(fileBytes)

    print("qrcode_files_decode_done ... ")

# 写文件文本内容
def writeFileText(filePath, text):
    with open(filePath, 'wb') as f1:

        f1.write(text.encode('utf-8'))

# 编码成二维码
def writeQrcode(outPath, dataText):
    imgName = os.path.basename(outPath)

    qrImg = qrcode.make(dataText)
    width, height = qrImg.size
    newImage = Image.new(mode='RGB', size=(width, height + 50), color=(200, 200, 255))
    newImage.paste(qrImg, (0, 50, width, height + 50))
    draw = ImageDraw.Draw(newImage)
    font = ImageFont.truetype("arial.ttf", 30)
    draw.text((width / 2, 5), imgName, (255, 0, 0), font)

    newImage.save(outPath)

    '''
    qr=qrcode.QRCode(
        version=40,  #生成二维码尺寸的大小 1-40  1:21*21（21+(n-1)*4）
        error_correction=qrcode.constants.ERROR_CORRECT_M, #L:7% M:15% Q:25% H:30%
        box_size=10, #每个格子的像素大小
        border=10, #边框的格子宽度大小
    )
    qr.add_data(dataText)
    #qr.make(fit=True)

    img=qr.make_image()
    #img.show()
    img.save(outPath)
    '''


# 解码成原始文件
def readQrcode(qrcodePath):
    qrcodeText = ""
    qucodeImg = Image.open(qrcodePath)

    pzDecodeImg = pyzbar.decode(qucodeImg)

    for barcode in pzDecodeImg:
        qrcodeText = barcode.data.decode("utf-8")##二维码的data信息
        # print(qrcodeText)
        barcoderect=barcode.rect##二维码在图片中的像素坐标位置
        qr_size=list(barcoderect)

    # 拿到内容
    # print(qrcodeText)
    return qrcodeText


# 文件拆分并转二维码
def fileToQrcodes(qrcodeFolder, base64Str, textLength) -> object:
    index = 0
    startIndex = 0
    endIndex = 0

    while (endIndex < len(base64Str)):
        startIndex = index * textLength
        endIndex = startIndex + textLength

        if endIndex > len(base64Str):
            endIndex = len(base64Str)

        partText = base64Str[startIndex : endIndex]

        qrFile = qrcodeFolder + ('%d' % index) + ".jpg"
        writeQrcode(qrFile, "%d|%s" % (index, partText))

        print("%d | %s" % (index, partText))

        index = index + 1

def getBase64Array(root, files):
    base64Array = [""] * len(files)

    # 遍历文件
    for oneQr in files:
        oneQrPath = os.path.join(root, oneQr)
        qrText = readQrcode(oneQrPath);
        splitIndex = qrText.find('|');
        qrIndex = int(qrText[0 : splitIndex])
        partBase64 = qrText[splitIndex + 1:]

        base64Array[qrIndex] = partBase64
        print(qrText)

    indexTmp = 0
    for oneText in base64Array:
        if oneText.strip() == '' :
            # print("二维码对应base64段缺失 ：%d" % indexTmp)
            raise Exception(print("二维码解码异常 ：对应base64段缺失 ：%d" % indexTmp))
        indexTmp = indexTmp + 1

    return base64Array

# 多个二维码转成文件
def qrcodesToFile(qrcodeFolder, filePath):

    for root, dirs, files in os.walk(qrcodeFolder):
        print(root) #当前目录路径
        print(dirs) #当前路径下所有子目录
        print(files) #当前路径下所有非目录子文件

        base64Array = getBase64Array(root, files)

        fullBase64Data = ''.join(base64Array)

        writeFileText("D:/source-files/test/qr/postman-api.base64-2", fullBase64Data)

        base64ToFile(fullBase64Data, filePath)

        print(base64Array)

    print("end ing ")

if __name__ == "__main__":

    #原始文件
    filePath = "D:/source-files/test/qr/postman-api.json.bz2"
    # 二维码输出文件夹
    qrcodeFolder = "D:/source-files/test/qr/img/"
    # 二维码长度拆分，太长摄像头有可能无法识别
    textLength = 300

    # 初始化文件夹
    if not os.path.exists(qrcodeFolder):
        os.makedirs(qrcodeFolder)

    base64Str = fileToBase64(filePath)

    print(base64Str)

    #base64Str = "0123456789-=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ~!@#$%^&*()_+:;,./?|<>"

    fileToQrcodes(qrcodeFolder, base64Str, textLength)

    #### 解析二维码
    decodeFilePath = "D:/source-files/test/qr/decode/"
    # 初始化文件夹
    if not os.path.exists(decodeFilePath):
        os.makedirs(decodeFilePath)

    qrcodesToFile(qrcodeFolder, decodeFilePath + "decode.json.bz2")

    # 测试
    outFile = "D:/source-files/test/qr/postman-api.base64"
    writeFileText(outFile, base64Str)