我正在根据表单中的用户输入创建word文档.但是,当用户输入一个unicode控制字符,并尝试使用python-docx包创建一个word文件时,会发生以下错误:
File "src\lxml\apihelpers.pxi", line 1439, in lxml.etree._utf8
ValueError: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters
我设法通过在每个请求之前检查表单中的无效xml字符来解决此问题(我有许多表单可能会出现此问题),并从字段中删除任何无效的xml字符.然后我创建一个新的不可变多字典,并用清理后的文本填充它.
from docx import Document
from docx.shared import Inches
from flask import Flask, render_template_string, request
from werkzeug.datastructures import ImmutableMultiDict
def valid_xml_char_ordinal(c):
codepoint = ord(c)
return (0x20 <= codepoint <= 0xD7FF or codepoint in (0x9, 0xA, 0xD) or
0xE000 <= codepoint <= 0xFFFD or 0x10000 <= codepoint <= 0x10FFFF)
app = Flask(__name__)
@app.before_request
def before_request():
if 'check_form_xml_validity' in …应用程序.py
from flask import Flask, render_template
from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField, FieldList, FormField
app = Flask(__name__)
app.config['SECRET_KEY'] = 'apple pie'
class BookForm(FlaskForm):
book = StringField('book title')
class LibraryForm(FlaskForm):
def __init__(self, min_entries=0, *args, **kwargs):
super(LibraryForm, self).__init__(*args, **kwargs)
self.books = FieldList(FormField(BookForm), min_entries=min_entries)
library = StringField('Library name')
books = FieldList(FormField(BookForm), min_entries=3)
submit = SubmitField('Submit')
@app.route('/book', methods=['GET', 'POST'])
def book():
form = LibraryForm(min_entries=5)
if form.validate_on_submit():
return 'aww yeah'
return render_template('books.html', form=form)
书籍.html
<html>
<form method="POST" action="">
{{ form.hidden_tag() }}
<div>{{ …我有这个数据库，其中包含 3 个表、饼图、人员以及两者之间的连接点。一个馅饼可以由很多人制作，一个人可以制作很多馅饼，所以这是一个非常合法的用例。
我想要输出的是一个巨大的表，格式如下：
+-------------------------------------------------------
| person_id | person_name | pies
+-------------------------------------------------------
| 1 | john | apple, banana, plum, ..
| 2 | mary | apple, plum, pineapple, ..
| ... | ... | ..., ..., ..., ...
| 10000 | josh | banana, coconut, ...
我目前正在实现这一目标如下：
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import random
import time
app = Flask(__name__)
db = SQLAlchemy(app)
person_to_pie_association_table = db.Table(
'person_to_pie_association_table',
db.metadata,
db.Column('pie_id', db.Integer, db.ForeignKey('pie.id')),
db.Column('person_id', db.Integer, db.ForeignKey('person.id'))
)
class Person(db.Model): …