I'm new to python flask, I'm using flask in backend and react js in front end and pymongo for the database. I want to upload the file from ReactJs to the flask server, I 'm getting an error while doing second method, How can I do it. Below is the code that I have tried.
I had tried two examples one is working and the other is not I don't know why.
werkzeug.exceptions.BadRequestKeyError: 400 Bad Request: The browser (or proxy) sent a request that this server could not understand.
KeyError: 'file'
- Directly sending the file to API. Case 1
Python code
import os
from flask import Flask, flash, request, redirect, url_for
from werkzeug.utils import secure_filename
UPLOAD_FOLDER = '/path/to/the/uploads'
ALLOWED_EXTENSIONS = set([ 'png', 'jpg', 'jpeg'])
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
@app.route('/api/users/add_photo', methods=['POST', "GET"])
def upload_file():
if request.method == 'POST':
# check if the post request has the file part
if 'file' not in request.files:
flash('No file part')
return redirect(request.url)
file = request.files['file']
# if user does not select file, browser also
# submit a empty part without filename
if file.filename == '':
flash('No selected file')
return redirect(request.url)
if file and allowed_file(file.filename):
filename = secure_filename(file.filename)
file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
image = upload(open(filename, 'rb'))
user_id = user.insert({"file":image})
return jsonify({'result': "file Upload successfully!!!"})
onSubmitImage(e) {
let file = this.state.file;
let formData = new FormData();
formData.append("file", file);
this.props.imageUpload(formData);
}
Above example is working perfectly
- Sending a file to API in the object. Case 2
Python code
import os
from flask import Flask, flash, request, redirect, url_for
from werkzeug.utils import secure_filename
UPLOAD_FOLDER = '/path/to/the/uploads'
ALLOWED_EXTENSIONS = set([ 'png', 'jpg', 'jpeg'])
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
@app.route('/api/users/add_photo', methods=['POST', "GET"])
def upload_file():
if request.method == 'POST':
# check if the post request has the file part
if 'file' not in request.files:
flash('No file part')
return redirect(request.url)
file = request.files['file']
name = request.get_json(force=True)["name"]
last_name = request.get_json(force=True)["last_name"]
email = request.get_json(force=True)["email"]
# if user does not select file, browser also
# submit a empty part without filename
if file.filename == '':
flash('No selected file')
return redirect(request.url)
if file and allowed_file(file.filename):
filename = secure_filename(file.filename)
file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
image = upload(open(filename, 'rb'))
user_id = user.insert({"file":image,"name":name,"last_name":last_name,"email":email})
return jsonify({'result': "file Upload successfully!!!"})
onSubmitImage(e) {
let file = this.state.file;
let formData = new FormData();
formData.append("file", file);
const data = {
file: formData
name: this.state.name
last_name: this.state.last_name
email: this.state.last_name
};
this.props.imageUpload(data);
}
I don't know why first is working and second not. I want to implement the second example because there other are data like name, last_name, email with image file.
