Question

以下是基本文件上传表单的后端Flask代码

@app.route('/gallery',methods=['GET','POST'])
def gallery():

error = None
if request.method == "POST":
    if 'file' not in request.files:
        flash("No file part")
        return redirect(request.url)

    file = request.files['file']
    print file
    file.save(os.path.join(app.config['UPLOAD_FOLDER'], file.filename))
    flash('file uploaded successfully')

return render_template('gallery.html')

表单的HTML前端代码：

<div class="page">
    <h2>Gallery</h2>

    <p>Upload image</p>
    <form action="{{ url_for('gallery') }}" method="post"  enctype="multipart/form-data">
        <input type="file" name="file"><input type="submit">
    </form>

</div>

我将UPLOAD_FOLDER变量设置为项目根目录中的/ uploads目录，我希望Flask存储图像，但每次提交图像上传时都会出现500错误。

奇怪的是，如果我将文件上传到项目目录的根目录，我就不会收到错误。如果我将文件上传到上传目录，则只会出现错误。

[编辑]添加了追溯

Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/Library/Python/2.7/sitea-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/Library/Python/2.7/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/fred/personalsite/cool_site.py", line 70, in gallery
    file.save(os.path.join(app.config['UPLOAD_FOLDER'], file.filename))
  File "/Library/Python/2.7/site-packages/werkzeug/datastructures.py", line 2653, in save
    dst = open(dst, 'wb')
IOError: [Errno 2] No such file or directory: u'/uploads/Lecture 1.pages'

Answer 1

您的错误说明该文件夹不存在。创建文件夹/uploads/并使其对程序可读。如果文件夹应该与您的Flask目录相关使用而是uploads/。

Answer 2

我解决了这个问题。发生这种情况是因为我的UPLOAD_FOLDER变量设置为/ uploads时应该相对于Flask目录设置（uploads /）

将文件上载到Flask目录时，内部服务器错误代码500

2 个答案: