[英]Flask-RESTful - Upload image
I was wondering on how do you upload files by creating an API service?我想知道如何通过创建 API 服务来上传文件?
class UploadImage(Resource):
def post(self, fname):
file = request.files['file']
if file:
# save image
else:
# return error
return {'False'}
Route路线
api.add_resource(UploadImage, '/api/uploadimage/<string:fname>')
And then the HTML然后是 HTML
<input type="file" name="file">
I have enabled CORS on the server side我在服务器端启用了 CORS
I am using angular.js as front-end and ng-upload if that matters, but can use CURL statements too!如果重要的话,我使用 angular.js 作为前端和ng-upload ,但也可以使用 CURL 语句!
The following is enough to save the uploaded file:以下内容足以保存上传的文件:
from flask import Flask
from flask_restful import Resource, Api, reqparse
import werkzeug
class UploadImage(Resource):
def post(self):
parse = reqparse.RequestParser()
parse.add_argument('file', type=werkzeug.datastructures.FileStorage, location='files')
args = parse.parse_args()
image_file = args['file']
image_file.save("your_file_name.jpg")
class UploadWavAPI(Resource):
def post(self):
parse = reqparse.RequestParser()
parse.add_argument('audio', type=werkzeug.FileStorage, location='files')
args = parse.parse_args()
stream = args['audio'].stream
wav_file = wave.open(stream, 'rb')
signal = wav_file.readframes(-1)
signal = np.fromstring(signal, 'Int16')
fs = wav_file.getframerate()
wav_file.close()
You should process the stream, if it was a wav, the code above works.您应该处理流,如果它是 wav,则上面的代码有效。 For an image, you should store on the database or upload to AWS S3 or Google Storage
对于图像,您应该存储在数据库中或上传到 AWS S3 或 Google Storage
Something on the lines of the following code should help.以下代码行中的某些内容应该会有所帮助。
@app.route('/upload', methods=['GET', 'POST'])
def upload():
if request.method == 'POST':
file = request.files['file']
extension = os.path.splitext(file.filename)[1]
f_name = str(uuid.uuid4()) + extension
file.save(os.path.join(app.config['UPLOAD_FOLDER'], f_name))
return json.dumps({'filename':f_name})
you can use the request from flask您可以使用来自烧瓶的请求
class UploadImage(Resource):
def post(self, fname):
file = request.files['file']
if file and allowed_file(file.filename):
# From flask uploading tutorial
filename = secure_filename(file.filename)
file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
return redirect(url_for('uploaded_file', filename=filename))
else:
# return error
return {'False'}
http://flask.pocoo.org/docs/0.12/patterns/fileuploads/ http://flask.pocoo.org/docs/0.12/patterns/fileuploads/
Following is a simple program to upload an image using curl and saving it locally.以下是一个使用 curl 上传图像并将其保存在本地的简单程序。
from flask import Flask
from flask_restful import Resource, Api, reqparse
import werkzeug
import cv2
import numpy as np
app = Flask(__name__)
api = Api(app)
parser = reqparse.RequestParser()
parser.add_argument('file',
type=werkzeug.datastructures.FileStorage,
location='files',
required=True,
help='provide a file')
class SaveImage(Resource):
def post(self):
args = parser.parse_args()
# read like a stream
stream = args['file'].read()
# convert to numpy array
npimg = np.fromstring(stream, np.uint8)
# convert numpy array to image
img = cv2.imdecode(npimg, cv2.IMREAD_UNCHANGED)
cv2.imwrite("saved_file.jpg", img)
api.add_resource(SaveImage, '/image')
if __name__ == '__main__':
app.run(debug=True)
You can like using curl like this:您可以像这样使用 curl:
curl localhost:port/image -F file=@image_filename.jpg curl localhost:port/image -F file=@image_filename.jpg
I was wondering on how do you upload files by creating an API service?我想知道如何通过创建API服务来上传文件?
class UploadImage(Resource):
def post(self, fname):
file = request.files['file']
if file:
# save image
else:
# return error
return {'False'}
Route路线
api.add_resource(UploadImage, '/api/uploadimage/<string:fname>')
And then the HTML然后是HTML
<input type="file" name="file">
I have enabled CORS on the server side我已经在服务器端启用了CORS
I am using angular.js as front-end and ng-upload if that matters, but can use CURL statements too!如果重要的话,我正在使用angular.js作为前端和ng-upload ,但是也可以使用CURL语句!
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