Python Flask - Bad Request 浏览器（或代理）发送了一个该服务器无法理解的请求
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Flask - Bad Request The browser (or proxy) sent a request that this server could not understand
提问by Roxas Zohbi
I'm trying to do a file upload & enter data task into my MongoDB using flask but I had this error when I filled my form & upload the image:
我正在尝试使用flask上传文件并将数据任务输入到我的MongoDB中，但是当我填写表单并上传图像时出现此错误：
Bad RequestThe browser (or proxy) sent a request that this server could not understand.
Bad Request浏览器（或代理）发送了一个该服务器无法理解的请求。
my HTML code
我的 HTML 代码
<form class="form-check form-control" method="post" enctype="multipart/form-data" action="{{ url_for('index') }}">
<label>Full Name*</label></td>
<input name="u_name" type="text" class="text-info my-input" required="required" />
<label>Email*</label>
<input name="u_email" type="email" class="text-info my-input" required="required" />
<label>Password*</label>
<input name="u_pass" type="password" class="text-info my-input" required="required" />
<label>Your Image*</label>
<input name="u_img" type="file" class="text-info" required="required" /></td>
<input name="btn_submit" type="submit" class="btn-info" />
</form>
& my python code:
&我的python代码：
from flask import Flask, render_template, request, url_for
from flask_pymongo import PyMongo
import os
app = Flask(__name__)
app.config['MONGO_DBNAME'] = 'flask_assignment'
app.config['MONGO_URI'] = 'mongodb://<user>:<pass>@<host>:<port>/<database>'
mongo = PyMongo(app)
app_root = os.path.dirname(os.path.abspath(__file__))
@app.route('/', methods=['GET', 'POST'])
def index():
target = os.path.join(app_root, 'static/img/')
if not os.path.isdir(target):
os.mkdir(target)
if request.method == 'POST':
name = request.form['u_name']
password = request.form['u_pass']
email = request.form['u_email']
file_name = ''
for file in request.form['u_img']:
file_name = file.filename
destination = '/'.join([target, file_name])
file.save(destination)
mongo.db.employee_entry.insert({'name': name, 'password': password, 'email': email, 'img_name': file_name})
return render_template('index.html')
else:
return render_template('index.html')
app.run(debug=True)
回答by Oluwafemi Sule
The error there is resulting from a BadRequestKeyErrorbecause of access to a key that doesn't exist in request.form.
那里的错误是BadRequestKeyError由于访问了不存在于request.form.
ipdb> request.form['u_img']
*** BadRequestKeyError: 400 Bad Request: The browser (or proxy) sent a request that this server could not understand.
Uploaded files are keyed under request.filesand not request.formdictionary. Also, you need to lose the loop because the value keyed under u_imgis an instance of FileStorageand not iterable.
上传的文件被键入request.files而不是request.form字典。此外，您需要丢失循环，因为键入的值u_img是 的实例FileStorage而不是iterable。
@app.route('/', methods=['GET', 'POST'])
def index():
target = os.path.join(app_root, 'static/img/')
if not os.path.isdir(target):
os.makedirs(target)
if request.method == 'POST':
...
file = request.files['u_img']
file_name = file.filename or ''
destination = '/'.join([target, file_name])
file.save(destination)
...
return render_template('index.html')
