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我正在尝试根据用户输入编辑可编辑 pdf 上的复选框。我可以使用 pdfrw 编辑文本字段,如下所示:https ://bostata.com/how-to-populate-fillable-pdfs-with-python/

#! /usr/bin/python

import os
import pdfrw


INVOICE_TEMPLATE_PATH = 'invoice_template.pdf'
INVOICE_OUTPUT_PATH = 'invoice.pdf'


ANNOT_KEY = '/Annots'
ANNOT_FIELD_KEY = '/T'
ANNOT_VAL_KEY = '/V'
ANNOT_RECT_KEY = '/Rect'
SUBTYPE_KEY = '/Subtype'
WIDGET_SUBTYPE_KEY = '/Widget'


def write_fillable_pdf(input_pdf_path, output_pdf_path, data_dict):
    template_pdf = pdfrw.PdfReader(input_pdf_path)
    annotations = template_pdf.pages[0][ANNOT_KEY]
    for annotation in annotations:
        if annotation[SUBTYPE_KEY] == WIDGET_SUBTYPE_KEY:
            if annotation[ANNOT_FIELD_KEY]:
                key = annotation[ANNOT_FIELD_KEY][1:-1]
                if key in data_dict.keys():
                    annotation.update(
                        pdfrw.PdfDict(AP=data_dict[key], V=data_dict[key])
                    )
    pdfrw.PdfWriter().write(output_pdf_path, template_pdf)


data_dict = {
   'business_name_1': 'Bostata',
   'customer_name': 'company.io',
   'customer_email': 'joe@company.io',
   'invoice_number': '102394',
   'send_date': '2018-02-13',
   'due_date': '2018-03-13',
   'note_contents': 'Thank you for your business, Joe',
   'item_1': 'Data consulting services',
   'item_1_quantity': '10 hours',
   'item_1_price': '$200/hr',
   'item_1_amount': '$2000',
   'subtotal': '$2000',
   'tax': '0',
   'discounts': '0',
   'total': '$2000',
   'business_name_2': 'Bostata LLC',
   'business_email_address': 'hi@bostata.com',
   'business_phone_number': '(617) 930-4294'
}

if __name__ == '__main__':
    write_fillable_pdf(INVOICE_TEMPLATE_PATH, INVOICE_OUTPUT_PATH, data_dict)

但是,我仍然无法保存对复选框值的更改。在本地,我可以看到输出文件中复选框的更改。但是,当我将文件上传到 AWS S3 存储桶时,不会保存更改。我不确定问题是什么。任何帮助,将不胜感激。谢谢!

4

1 回答 1

4

我将参考此 PDF 参考手册

复选框属于按钮类型(参见参考手册表 220)。

此外,请参见“12.7.4.2.3 复选框”一章。

因此,应设置字段“外观流”(/AS)和“值” 。(/V)

(进一步,请参阅“12.5.5 外观流”一章。有关信息。)

字段/AS需要设置pdfrw.PdfName

最后,可以将 Acroform 字段NeedAppearances设置为 true,因此默认情况下所有字段都是可见的(参考手册表 218)。

完整代码:

import os
import pdfrw

INVOICE_TEMPLATE_PATH = 'invoice_template.pdf'
INVOICE_OUTPUT_PATH   = 'invoice_output.pdf'

ANNOT_KEY = '/Annots'           # key for all annotations within a page
ANNOT_FIELD_KEY = '/T'          # Name of field. i.e. given ID of field
ANNOT_FORM_type = '/FT'         # Form type (e.g. text/button)
ANNOT_FORM_button = '/Btn'      # ID for buttons, i.e. a checkbox
ANNOT_FORM_text = '/Tx'         # ID for textbox
SUBTYPE_KEY = '/Subtype'
WIDGET_SUBTYPE_KEY = '/Widget'

def write_fillable_pdf(input_pdf_path, output_pdf_path, data_dict):
    template_pdf = pdfrw.PdfReader(input_pdf_path)
    for Page in template_pdf.pages:
        if Page[ANNOT_KEY]:
            for annotation in Page[ANNOT_KEY]:
                if annotation[ANNOT_FIELD_KEY] and annotation[SUBTYPE_KEY] == WIDGET_SUBTYPE_KEY :
                    key = annotation[ANNOT_FIELD_KEY][1:-1] # Remove parentheses
                    if key in data_dict.keys():
                        if annotation[ANNOT_FORM_type] == ANNOT_FORM_button:
                            # button field i.e. a checkbox
                            annotation.update( pdfrw.PdfDict( V=pdfrw.PdfName(data_dict[key]) , AS=pdfrw.PdfName(data_dict[key]) ))
                        elif annotation[ANNOT_FORM_type] == ANNOT_FORM_text:
                            # regular text field
                            annotation.update( pdfrw.PdfDict( V=data_dict[key], AP=data_dict[key]) )
    template_pdf.Root.AcroForm.update(pdfrw.PdfDict(NeedAppearances=pdfrw.PdfObject('true')))
    pdfrw.PdfWriter().write(output_pdf_path, template_pdf)

data_dict = {
    'item_1_amount': '123',
    'CheckBox1': 'Yes',
    'CheckBox2': 'Off'  }

if __name__ == '__main__':
    write_fillable_pdf(INVOICE_TEMPLATE_PATH, INVOICE_OUTPUT_PATH, data_dict)
于 2020-05-06T04:32:52.973 回答