Failure to save uploaded txt file in flask

Question

I'm new to flask. I'm trying to take user import and save it in the backend. I failed to save the file (I couldn't see uploaded file in static), hence couldn't read from file. Can anyone suggest a solution? Thanks.

Error: FileNotFoundError: [Errno 2] No such file or directory: 'static/uploadsDB/Reviews.txt'

My app.py:

#flask packages
from flask import Flask, render_template, request
from flask_sqlalchemy import SQLAlchemy
from flask_bootstrap import Bootstrap 
from flask_uploads import UploadSet,configure_uploads,IMAGES,DATA,ALL

#systems
import os 
from werkzeug.utils import secure_filename
import spacy

app = Flask(__name__)
Bootstrap(app)
#db = SQLAlchemy(app)

# Configuration for File Uploads
files = UploadSet('files',ALL)
app.config['UPLOADED_FILES_DEST'] = 'static/uploadsDB'
configure_uploads(app,files)

# Spacy packages
nlp = spacy.load("en_core_web_sm")

@app.route('/')
def index():
    return render_template('index.html')

@app.route('/upload', methods=['POST','GET'])
def upload():
    if request.method == 'POST' and 'txt_data' in request.files:
        num_sentences = request.form['num_sentences']
        file = request.files['txt_data']
        filename = secure_filename(file.filename)
        # os.path.join is used so that paths work in every operating system
        # file.save(os.path.join("wherever","you","want",filename))
        file.save(os.path.join('static/uploadsDB',filename))
        fullfile = os.path.join('static/uploadsDB',filename)
        text_file = open(os.path.join('static/uploadsDB',filename), "r").read()
        nlp_file_doc = nlp(text_file)
        sentences = list(nlp_file_doc.sents)
        return render_template('annotation.html', sentences = sentences)

My index.html:

<div class="container">
          <div class="main">
              <div class="row">
                <div class="col-md-8" style="background-color:#ecb164">
                  <h3 style="color:#fff">Step 1: Upload your dataset</h3>
                    <p style="color:#fff">This tool only accept <ins>txt</ins> format text data </p>
                    <p style="color:#fff">Every sentence should either separate with punctuation or  </p>
                      <form method=POST enctype=multipart/form-data action="{{ url_for('upload') }}" class="form-group">
                        <div class="form-group">
                          <input type="file" name="txt_data">
                          <h3 style="color:rgb(255, 255, 255)">Step 2: Input lines of sentences you have processed</h3>
                            <p style="color:#fff"> Please enter 0 if this is your first attempt </p>
                        <form method=POST action="{{ url_for('upload') }}" class="form-group">
                        <input type="text" name="num_sentences" value=0>

score 0 · Answer 1 · answered Jan 18 '21 at 07:49

The problem is that the file does not get saved in the first place.

This is the problematic line:

file.save(os.path.join('static/uploadsDB',filename))

Here, file refers to the form data, but as you use Flask-Uploads or its successor Flask-Reuploaded the UploadSet is taking care of saving a file.

And you named your UploadSet files.

Also, as you have configured the path were to save the files already ( app.config['UPLOADED_FILES_DEST'] = 'static/uploadsDB' ) you do not need to repeat this information again.

So, in order to save the file, you only have to use the following code:

files.save(file)

The save method of an UploadSet also takes an argument name.

If you wish to give the saved file an arbitrary name, you can write ...

files.save(file, name="some_name")

If you want to learn more about Flask-Reuploaded you can always have a look at the source code.

You can also learn more about the used data structures for the form results in the werkzeug documentation.

Failure to save uploaded txt file in flask

1 Answers1