使用 FilePond(React 组件)将图像上传到 Flask 服务器
Uploading images to a Flask server using FilePond (React component)
我有一个本地托管的 Flask 服务器和一个小型 React 应用程序。我正在尝试使用 FilePond 作为图像上传的简单解决方案。 FilePond 负责将每个图像发送到服务器。
所以我显然遇到的问题是后端代码。我已经这样设置了我的服务器,per Flask's docs
UPLOAD_FOLDER='/images'
ALLOWED_EXTENSIONS = set(['png', 'jpg', 'jpeg', 'gif'])
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
def allowed_file(filename):
return '.' in filename and \
filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
@app.route('/', methods=['GET', 'POST'])
def upload_file():
print(request.files)
if request.method == "POST":
# check if the post request has the file part
if 'file' not in request.files:
print('No file part')
return make_response("No File Part", 400)
file = request.files["file"]
# if user does not select file, browser also submit an empty part
# without filename
if file.filename == '':
print('No selected file')
return make_response("No Selected File", 400)
if file and allowed_file(file.filename):
filename = secure_filename(file.filename) # filenames can be dangerous!
file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
return make_response("Success", 201)
但是,当放一个
print(request.files)
upload_file() 函数开头的语句,这似乎是服务器正在接收的请求:
ImmutableMultiDict([('images', <FileStorage: 'imageName.jpg' ('image/jpeg')>)])
我不知道该如何处理。我不知道 'images' 是否是 'file' 应该在的位置。我只是不确定从这里去哪里或如何处理接收到的数据。我不知道是什么,我从未见过使用 <> 语法。
有人能帮忙吗?
这是一个pastebin for the whole server-side code
谢谢!
这是一个概念验证应用程序,可让您使用表单上传多张图片:
注意表单的 enctype="multipart/form-data"
属性,没有这个你不能上传文件。
还要注意文件输入的 multiple
属性。这允许客户端 select 多个文件。您需要使用request.files.getlist()
获取所有上传文件的列表。
一旦您生成了保存文件的路径,保存一个 werkzeug.FileStorage
对象就是调用它的 .save(path_to_save)
方法。
from flask import Flask, request, render_template_string, redirect, abort
from werkzeug import secure_filename
from pathlib import Path
UPLOAD_DIR: Path = Path(__file__).parent / 'uploads'
UPLOAD_DIR.mkdir(parents=True, exist_ok=True)
app = Flask(__name__)
def is_valid_upload(upload) -> bool:
# some validation logic
return Path(upload.filename).suffix.lower() in ['.jpg', '.jpeg']
@app.route('/', methods=['GET', 'POST'])
def upload():
html = '''
<form action='/' method='POST' enctype="multipart/form-data">
<input type="file" name='images' multiple>
<button>Upload</button>
</form>
'''
if request.method == 'GET':
return html
uploaded_files = request.files.getlist('images')
if not uploaded_files or not uploaded_files[0].filename:
return redirect('/')
valid_uploads = list(filter(is_valid_upload, uploaded_files))
if not valid_uploads:
return 'invalid image(s)', 400
for upload in valid_uploads:
filename = secure_filename(upload.filename)
save_path = str(UPLOAD_DIR / filename)
upload.save(save_path)
return 'uploaded'
if __name__ == "__main__":
app.run()
我有一个本地托管的 Flask 服务器和一个小型 React 应用程序。我正在尝试使用 FilePond 作为图像上传的简单解决方案。 FilePond 负责将每个图像发送到服务器。
所以我显然遇到的问题是后端代码。我已经这样设置了我的服务器,per Flask's docs
UPLOAD_FOLDER='/images'
ALLOWED_EXTENSIONS = set(['png', 'jpg', 'jpeg', 'gif'])
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
def allowed_file(filename):
return '.' in filename and \
filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
@app.route('/', methods=['GET', 'POST'])
def upload_file():
print(request.files)
if request.method == "POST":
# check if the post request has the file part
if 'file' not in request.files:
print('No file part')
return make_response("No File Part", 400)
file = request.files["file"]
# if user does not select file, browser also submit an empty part
# without filename
if file.filename == '':
print('No selected file')
return make_response("No Selected File", 400)
if file and allowed_file(file.filename):
filename = secure_filename(file.filename) # filenames can be dangerous!
file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
return make_response("Success", 201)
但是,当放一个
print(request.files)
upload_file() 函数开头的语句,这似乎是服务器正在接收的请求:
ImmutableMultiDict([('images', <FileStorage: 'imageName.jpg' ('image/jpeg')>)])
我不知道该如何处理。我不知道 'images' 是否是 'file' 应该在的位置。我只是不确定从这里去哪里或如何处理接收到的数据。我不知道是什么,我从未见过使用 <> 语法。
有人能帮忙吗?
这是一个pastebin for the whole server-side code
谢谢!
这是一个概念验证应用程序,可让您使用表单上传多张图片:
注意表单的 enctype="multipart/form-data"
属性,没有这个你不能上传文件。
还要注意文件输入的 multiple
属性。这允许客户端 select 多个文件。您需要使用request.files.getlist()
获取所有上传文件的列表。
一旦您生成了保存文件的路径,保存一个 werkzeug.FileStorage
对象就是调用它的 .save(path_to_save)
方法。
from flask import Flask, request, render_template_string, redirect, abort
from werkzeug import secure_filename
from pathlib import Path
UPLOAD_DIR: Path = Path(__file__).parent / 'uploads'
UPLOAD_DIR.mkdir(parents=True, exist_ok=True)
app = Flask(__name__)
def is_valid_upload(upload) -> bool:
# some validation logic
return Path(upload.filename).suffix.lower() in ['.jpg', '.jpeg']
@app.route('/', methods=['GET', 'POST'])
def upload():
html = '''
<form action='/' method='POST' enctype="multipart/form-data">
<input type="file" name='images' multiple>
<button>Upload</button>
</form>
'''
if request.method == 'GET':
return html
uploaded_files = request.files.getlist('images')
if not uploaded_files or not uploaded_files[0].filename:
return redirect('/')
valid_uploads = list(filter(is_valid_upload, uploaded_files))
if not valid_uploads:
return 'invalid image(s)', 400
for upload in valid_uploads:
filename = secure_filename(upload.filename)
save_path = str(UPLOAD_DIR / filename)
upload.save(save_path)
return 'uploaded'
if __name__ == "__main__":
app.run()