python：文件轉二維碼（拆分轉換）

文件轉二維碼時，考慮到二維碼存儲內容有限，可以使用拆分成多個二維碼的的方案

 

方案詳細流程

1. 將原始文件使用最高壓縮率bz2 進行壓縮

2. 將壓縮文件轉成base64

3. 將base64 進行拆分，拆分內容中拼上序號

4. 將上方base64及序號內容轉二維碼

5. 存儲二維碼

話不多數，直接上代碼

import base64
import os

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

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

        base64Data = base64.b64encode(f1.read())  # base64類型
        #  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 ... ")

# 寫文件文本內容
def writeFileText(filePath, text):
    with open(filePath, 'wb') as f1:

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

# 編碼成二維碼
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,  #生成二維碼尺寸的大小 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, #每個格子的像素大小
        border=10, #邊框的格子寬度大小
    )
    qr.add_data(dataText)
    #qr.make(fit=True)

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


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

    pzDecodeImg = pyzbar.decode(qucodeImg)

    for barcode in pzDecodeImg:
        qrcodeText = barcode.data.decode("utf-8")##二維碼的data信息
        # print(qrcodeText)
        barcoderect=barcode.rect##二維碼在圖片中的像素坐標位置
        qr_size=list(barcoderect)

    # 拿到內容
    # print(qrcodeText)
    return qrcodeText


# 文件拆分並轉二維碼
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)

    # 遍歷文件
    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("二維碼對應base64段缺失 ：%d" % indexTmp)
            raise Exception(print("二維碼解碼異常 ：對應base64段缺失 ：%d" % indexTmp))
        indexTmp = indexTmp + 1

    return base64Array

# 多個二維碼轉成文件
def qrcodesToFile(qrcodeFolder, filePath):

    for root, dirs, files in os.walk(qrcodeFolder):
        print(root) #當前目錄路徑
        print(dirs) #當前路徑下所有子目錄
        print(files) #當前路徑下所有非目錄子文件

        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"
    # 二維碼輸出文件夾
    qrcodeFolder = "D:/source-files/test/qr/img/"
    # 二維碼長度拆分，太長攝像頭有可能無法識別
    textLength = 300

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

    base64Str = fileToBase64(filePath)

    print(base64Str)

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

    fileToQrcodes(qrcodeFolder, base64Str, textLength)

    #### 解析二維碼
    decodeFilePath = "D:/source-files/test/qr/decode/"
    # 初始化文件夾
    if not os.path.exists(decodeFilePath):
        os.makedirs(decodeFilePath)

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

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