CN 2023-04-21

<!-- upload_interface.html -->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Upload interface</title>
</head>
<body>
<h1>Single File Uploader</h1>
<form
    action="/upload"
    method="POST"
    enctype="multipart/form-data"
>
    <label for="idFile">
        Pick file to upload:
    </label>
    <input type="file"
           id="idFile"
           name="nameFile">
    <br>
    <input type="submit"
           value="confirm and upload file"
    >
</form>
</body>
</html>

*******************

# app.py

from flask import Flask, \
            request,\
            render_template

from werkzeug.utils import \
    secure_filename

NAME_FILE = "nameFile"

app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = "dls"

@app.route("/", methods=['GET', 'POST'])
def root():
    return \
    render_template("upload_interface.html")
# def root

@app.route("/upload", methods=['POST'])
def upload():
    #request.form[NAME_FILE] # not the way
    theFile = request.files[NAME_FILE]
    if(theFile):
        src_fname = theFile.filename
        sfname = secure_filename(src_fname)
        if(sfname!=""):
            # where to save
            dst_fname =\
            f"{app.config['UPLOAD_FOLDER']}/{sfname}"

            try:
                theFile.save(
                    dst_fname
                )
                return \
            f"File saved OK @ {dst_fname}"

            except Exception as e:
                return \
            f"Could NOT save {dst_fname}"
        # if
        else:
            return f"Could not secure file name for {src_fname}"
        # if-else
    else:
        return f"Could not access the uploaded file"
    # if-else
# def upload

if (__name__=='__main__'):
    app.run(debug=True)