python - Flask Upload Image 仅适用于 Localhost,不适用于 Online Server
问题描述
美好的一天。我在使用烧瓶上传图像时遇到了一点问题。我可以在本地主机的烧瓶上上传图像(网络应用程序托管在我的桌面上)。但是当我在在线服务器上加载烧瓶应用程序时,我总是遇到“FileNotFoundError”。我也将权限更改为 777 但仍然无法正常工作。
这是html上传代码。
<form name="edit_vehicle_info" action="/vehicle_info_form/" method="POST" enctype="multipart/form-data" class="formfield">
<div class="form-group">
<label for="changeVehicleImg">Vehicle Image</label>
<input type="file" id="changeVehicleImg" name="changeVehicleImg" accept="image/*">
</div>
这是python上传代码。
#vehicle_info_form
@app.route('/vehicle_info_form/', methods=['GET', 'POST'])
def vehicle_info_form():
try:
if request.method == "GET":
return render_template(
'vehicleInfo.html'
)
elif request.method == "POST":
inputVehicleImg = request.files['changeVehicleImg']
if inputVehicleImg.filename == "":
inputVehicleImg_filename = ""
else:
print(inputVehicleImg.filename)
print(app.config['UPLOAD_FOLDER_IMG_VEHICLE'])
inputVehicleImg_filename = secure_filename(inputVehicleImg.filename)
inputVehicleImg.save(os.path.join(app.config['UPLOAD_FOLDER_IMG_VEHICLE'], inputVehicleImg_filename))
print ('success')
except Exception as e:
print(e)
return redirect(url_for('vehicle_info_form'))
python上传代码可以打印inputVehicleImg.filename
,app.config['UPLOAD_FOLDER_IMG_VEHICLE']
然后出现错误。
这是错误。
Traceback (most recent call last):
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/app.py", line 1985, in wsgi_app
response = self.handle_exception(e)
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/app.py", line 1540, in handle_exception
reraise(exc_type, exc_value, tb)
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/app.py", line 1615, in full_dispatch_request
return self.finalize_request(rv)
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/app.py", line 1632, in finalize_request
response = self.process_response(response)
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/app.py", line 1858, in process_response
self.save_session(ctx.session, response)
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/app.py", line 924, in save_session
return self.session_interface.save_session(self, session, response)
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/sessions.py", line 363, in save_session
val = self.get_signing_serializer(app).dumps(dict(session))
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/itsdangerous/serializer.py", line 166, in dumps
payload = want_bytes(self.dump_payload(obj))
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/itsdangerous/url_safe.py", line 42, in dump_payload
json = super(URLSafeSerializerMixin, self).dump_payload(obj)
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/itsdangerous/serializer.py", line 133, in dump_payload
return want_bytes(self.serializer.dumps(obj, **self.serializer_kwargs))
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/sessions.py", line 85, in dumps
return json.dumps(_tag(value), separators=(',', ':'))
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/json.py", line 167, in dumps
rv = _json.dumps(obj, **kwargs)
File "/usr/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/usr/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/usr/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/home/ubuntu/Projects/FMS/lib/python3.6/site-packages/flask/json.py", line 81, in default
return _json.JSONEncoder.default(self, o)
File "/usr/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'FileNotFoundError' is not JSON serializable
请帮忙。谢谢你。
解决方案
我通过更新解决了这个问题app.config['UPLOAD_FOLDER_IMG_VEHICLE']
。我os.getcwd()
用来获取完整的当前路径并添加应该保存图像的路径。
try
首先,我通过添加and来检查错误的根源是什么except FileNotFoundError:
。
#vehicle_info_form
@app.route('/vehicle_info_form/', methods=['GET', 'POST'])
def vehicle_info_form():
try:
if request.method == "GET":
return render_template(
'vehicleInfo.html'
)
elif request.method == "POST":
inputVehicleImg = request.files['changeVehicleImg']
if inputVehicleImg.filename == "":
inputVehicleImg_filename = ""
else:
print(inputVehicleImg.filename)
print(app.config['UPLOAD_FOLDER_IMG_VEHICLE'])
inputVehicleImg_filename = secure_filename(inputVehicleImg.filename)
try:
inputVehicleImg.save(os.path.join(app.config['UPLOAD_FOLDER_IMG_VEHICLE'], inputVehicleImg_filename))
except FileNotFoundError:
print("File does not exist")
print ('success')
except Exception as e:
print(e)
return redirect(url_for('vehicle_info_form'))
我尝试上传图像并在控制台中返回File does not exist
。
app.config['UPLOAD_FOLDER_IMG_VEHICLE']
然后我检查应该上传图像的路径。
print(app.config['UPLOAD_FOLDER_IMG_VEHICLE'])
在那里我发现我的在线服务器中的路径不一样,所以我更新了它。
import os
path = os.getcwd()
print(path)
UPLOAD_FOLDER_IMG_VEHICLE = path + "/apps/FMS/static/images/vehicleInfo"
app.config['UPLOAD_FOLDER_IMG_VEHICLE'] = UPLOAD_FOLDER_IMG_VEHICLE
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