SW 2023-04-26

<!-- upload_example.html -->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>File Upload Example</title>
</head>
<body>
<form action="/upload"
      method="POST"
      enctype="multipart/form-data"
>
    <label for="idName">Your name:</label>
    <input type="text"
           id="idName"
           name="nameUser"
           placeholder="your name"
           value="John Smith"
    ><!-- nome -->
    <br>

    <label for="idFile">Your text:</label>
    <input type="file"
           id="idFile"
           name="nameFile"
    ><!-- seleção e envio do ficheiro -->
    <br>

    <input type="submit"
           value="send name + file"
    ><!-- confirmar as respostas -->
</form>
</body>
</html>

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

# app.py
import os

from flask import Flask,\
                request,\
                render_template

from werkzeug.utils import \
    secure_filename

NAME_USER = "nameUser"
NAME_FILE = "nameFile"

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

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

@app.route("/upload", methods=['POST'])
def upload():
    nameUser:str = request.form[NAME_USER]

    # NOT LIKE THIS
    #nameFile:str = request.form[NAME_FILE]
    #return f"got {nameUser} + got {nameFile}"

    theFile = request.files[NAME_FILE]
    if(theFile):
        src_fname = theFile.filename
        sec_fname = secure_filename(src_fname)
        if(sec_fname!=""):
            # conseguimos obter um nome "seguro"
            dst_fname = \
            os.path.join(
                app.config['UPLOAD_FOLDER'],
                sec_fname
            )

            try:
                theFile.save(
                    dst=dst_fname
                )

                msgOK:str =\
                f"Name received: {nameUser}<br>"+\
                f"Your file {src_fname} was saved OK @"+\
                f"{dst_fname}"

                return msgOK

            except Exception as e:
                msgOK: str = \
                    f"Your file {src_fname} was NOT saved server-side"
                return msgOK

            """
            f"{app.config['UPLOAD_FOLDER']}/{sec_fname}"
            ups/1.txt
            ups/batatas.txt
            ups/sl2.txt
            """
        else:
            return "Could not secure filename"
        # if-else
    else:
        return "Could not receive the file"+\
    f"<br>but received nameUser={nameUser}"
    # if-else
# def upload

app.run(
    # host # "127.0.0.1", by default
    # port # 5000, by default
    debug=True
)