如何将使用flask dropzone上传的图像传递到另一个页面答案

【问题标题】：How to pass image uploaded with flask dropzone to another page如何将使用flask dropzone上传的图像传递到另一个页面
【发布时间】：2019-09-04 22:29:11
【问题描述】：

所以我已经使用flask dropzone 将图像上传到uploads 文件夹中，并且我希望能够将其传递到我的makeMeme 页面，这样我就可以使用html img 标签显示该图像。这是我上传图像并尝试传递它的方式。但是，当我运行基本的 img take 并尝试引用文件时，我得到一个错误。这是我得到的属性错误：

AttributeError: 'NoneType' object has no attribute 'filename'

这是我的主要 python 页面。

import os
from flask import Flask, render_template,request, url_for
from flask_dropzone import Dropzone


app = Flask(__name__)
app.secret_key = 'key'

dir_path = os.path.dirname(os.path.realpath(__file__))



app.config.update(
    UPLOADED_PATH=os.path.join(dir_path, 'uploads'),
    # Flask-Dropzone config:
    DROPZONE_ALLOWED_FILE_TYPE='image',
    DROPZONE_MAX_FILE_SIZE=3,
    DROPZONE_MAX_FILES=20,
    DROPZONE_UPLOAD_ON_CLICK=True
)
app.config['DROPZONE_REDIRECT_VIEW'] = 'makeMeme'

dropzone = Dropzone(app)

@app.route('/upload', methods=['POST', 'GET'])
def upload():
    if request.method == 'POST':
        f = request.files.get('file')
        file = f.save(os.path.join(app.config['UPLOADED_PATH'], f.filename))
    return render_template('upload.html', file_name = file)

@app.route('/makeMeme', methods=['POST', 'GET'])
def makeMeme():
    return render_template("makeMeme.html")

【问题讨论】：

标签： python html flask file-upload dropzone.js

【解决方案1】：

首先创建templates和static文件夹
然后复制模板内的upload.html和makeMeme.html
然后执行app.py
我希望这能解决您的问题

应用程序.py

import os
from flask import Flask, render_template,request, url_for
from flask_dropzone import Dropzone

app = Flask(__name__)
app.secret_key = 'key'

dir_path = os.path.dirname(os.path.realpath(__file__))


app.config.update(
    UPLOADED_PATH=os.path.join(dir_path, 'static'),
    # Flask-Dropzone config:
    DROPZONE_ALLOWED_FILE_TYPE='image',
    DROPZONE_MAX_FILE_SIZE=3,
    DROPZONE_MAX_FILES=20
)
app.config['DROPZONE_REDIRECT_VIEW'] = 'makeMeme'

dropzone = Dropzone(app)

filename = None

@app.route('/upload', methods=['POST', 'GET'])
def upload():
    global filename
    file = None
    if request.method == 'POST':
        f = request.files.get('file')
        file = f.save(os.path.join(app.config['UPLOADED_PATH'], f.filename))
        filename = f.filename
    return render_template('upload.html')

@app.route('/makeMeme', methods=['POST', 'GET'])
def makeMeme():
    global filename
    return render_template("makeMeme.html", file_name = filename)

app.run(debug=True)

上传.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Flask-Dropzone Demo</title>
  {{ dropzone.load_css() }}
  {{ dropzone.style('border: 2px dashed #0087F7; margin: 10%; min-height: 400px;') }}
</head>
<body>
  {{ dropzone.create(action='upload') }}
  {{ dropzone.load_js() }}
  {{ dropzone.config() }}
</body>
</html>

makeMeme.html

<!DOCTYPE html>
<html>
    <img src="{{url_for('static',filename=file_name)}}" alt="Fail">
</html>

【讨论】：