某个业务需要让用户下载文件盖章之后重新上传盖章版本,但是现在有个问题那就是操作基本都在手机端,通过手机端上传 pdf 的确是个问题。所以目前的方案是上传盖章版之后的图片。
然鹅,这个方法用户表示略微有点蛋疼,有的需要上传几十张图片,这些盖章的图片重新下载之后管理也是个问题。那个是哪个根本分不清楚,并且要想根据业务编号来管理盖章版文件也是个问题。
所以,就给出了一个方案,将上传的 图片重新转换为 pdf。
鉴于图片是放在 oss 上的,oss 本身倒是提供了图片转 pdf 的方法(https://help.aliyun.com/zh/imm/user-guide/convert-an-image-to-pdf):
# -*- coding: utf-8 -*- # This file is auto-generated, don't edit it. Thanks. import sys import os from typing import List from alibabacloud_imm20200930.client import Client as imm20200930Client from alibabacloud_tea_openapi import models as open_api_models from alibabacloud_imm20200930 import models as imm_20200930_models from alibabacloud_tea_util import models as util_models from alibabacloud_tea_util.client import Client as UtilClient class Sample: def __init__(self): pass @staticmethod def create_client( access_key_id: str, access_key_secret: str, ) -> imm20200930Client: """ 使用AccessKey ID&AccessKey Secret初始化账号Client。 @param access_key_id: @param access_key_secret: @return: Client @throws Exception """ config = open_api_models.Config( access_key_id=access_key_id, access_key_secret=access_key_secret ) # 填写访问的IMM域名。 config.endpoint = f'imm.cn-zhangjiakou.aliyuncs.com' return imm20200930Client(config) @staticmethod def main( args: List[str], ) -> None: # 阿里云账号AccessKey拥有所有API的访问权限,建议您使用RAM用户进行API访问或日常运维。 # 强烈建议不要把AccessKey ID和AccessKey Secret保存到工程代码里,否则可能导致AccessKey泄露,威胁您账号下所有资源的安全。 # 本示例通过从环境变量中读取AccessKey,来实现API访问的身份验证。如何配置环境变量,请参见https://help.aliyun.com/document_detail/2361894.html。 imm_access_key_id = os.getenv("AccessKeyId") imm_access_key_secret = os.getenv("AccessKeySecret") client = Sample.create_client(imm_access_key_id, imm_access_key_secret) sources_0 = imm_20200930_models.CreateImageToPDFTaskRequestSources( uri='oss://test-bucket/test-object.jpg' ) create_image_to_pdftask_request = imm_20200930_models.CreateImageToPDFTaskRequest( project_name='test-project', target_uri='oss://test-bucket/test-target-object.pdf', sources=[ sources_0 ] ) runtime = util_models.RuntimeOptions() try: # 复制代码运行请自行打印API的返回值。 client.create_image_to_pdftask_with_options(create_image_to_pdftask_request, runtime) except Exception as error: # 如有需要,请打印错误信息。 UtilClient.assert_as_string(error.message) @staticmethod async def main_async( args: List[str], ) -> None: # 阿里云账号AccessKey拥有所有API的访问权限,建议您使用RAM用户进行API访问或日常运维。 # 强烈建议不要把AccessKey ID和AccessKey Secret保存到工程代码里,否则可能导致AccessKey泄露,威胁您账号下所有资源的安全。 # 本示例通过从环境变量中读取AccessKey,来实现API访问的身份验证。如何配置环境变量,请参见https://help.aliyun.com/document_detail/2361894.html。 imm_access_key_id = os.getenv("AccessKeyId") imm_access_key_secret = os.getenv("AccessKeySecret") client = Sample.create_client(imm_access_key_id, imm_access_key_secret) sources_0 = imm_20200930_models.CreateImageToPDFTaskRequestSources( uri='oss://test-bucket/test-object.jpg' ) create_image_to_pdftask_request = imm_20200930_models.CreateImageToPDFTaskRequest( project_name='test-project', target_uri='oss://test-bucket/test-target-object.pdf', sources=[ sources_0 ] ) runtime = util_models.RuntimeOptions() try: # 复制代码运行请自行打印API的返回值。 await client.create_image_to_pdftask_with_options_async(create_image_to_pdftask_request, runtime) except Exception as error: # 如有需要,请打印错误信息。 UtilClient.assert_as_string(error.message) if __name__ == '__main__': Sample.main(sys.argv[1:])
然而,项目里面已经引入了比较旧的 aliyun 的 sdk。这个新的再引用之后就需要修改之前的代码,这也就蛋疼了。
网上搜了一下,代码不少,但是不好用啊,这尼玛,就没人写个靠谱的代码吗?
最终通过PyMuPDF来解决了这个问题:
import fitz # PyMuPDF # Open an existing PDF or create a new one pdf_document = fitz.open() # Creates a new PDF # Define the image file path image_path = "path/to/your/image.jpg" # Get the dimensions of the image img = fitz.open(image_path) img_rect = img[0].rect # Get the rectangle of the first page of the image # Create a new page with the same dimensions as the image pdf_page = pdf_document.new_page(width=img_rect.width, height=img_rect.height) # Insert the image into the new page pdf_page.insert_image(pdf_page.rect, filename=image_path) # Save the PDF to a file pdf_document.save("output.pdf") pdf_document.close()
实际的业务代码:
def converImageToPdf(img_list): # pdf = fitz.open() # PyMuPDF pdf_document = fitz.open() # Creates a new PDF for img_url in img_list: img_local_file = download_image(img_url,'confirmd_images') img = fitz.open(img_local_file) img_rect = img[0].rect # Get the rectangle of the first page of the image # Create a new page with the same dimensions as the image pdf_page = pdf_document.new_page(width=img_rect.width, height=img_rect.height) # Insert the image into the new page pdf_page.insert_image(pdf_page.rect, filename=img_local_file) img.close() file_name = random_file_name('pdf') if not os.path.exists('confirmd_receipt'): os.mkdir('confirmd_receipt') pdf_document.save(os.path.join('confirmd_receipt/') + file_name) pdf_document.close()
实际效果:
依赖:
PyMuPDFb == 1.24.9