回答編集履歴
1
flash表示を追加
answer
CHANGED
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@@ -5,4 +5,59 @@
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5
5
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content_lengthが0のデータが来ているようです。
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(少なくともChromeで実行した場合は)そのif文はTrueになることがないと思います。
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(少なくともChromeで実行した場合は)そのif文はTrueになることがないと思います。
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### 2020/02/18 12:40追加
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```html
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<!-- templates/index.html -->
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Upload new File</title>
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</head>
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<body>
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{% with messages = get_flashed_messages() %}
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{% if messages %}
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{% for message in messages %}
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<p>{{ message }}</p>
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{% endfor %}
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{% endif %}
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{% endwith %}
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<h1>Upload new File</h1>
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<form method=post enctype=multipart/form-data>
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<input type=file name=file>
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<input type=submit value=Upload>
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</form>
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</body>
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</html>
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```
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```python
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# app.py
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40
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# render_templateを読み込み
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from flask import Flask, flash, request, redirect, url_for, render_template
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# 中略
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@app.route('/', methods=['GET', 'POST'])
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def upload_file():
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if request.method == 'POST':
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# check if the post request has the file part
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if 'file' not in request.files:
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flash('No file part')
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return render_template('index.html')
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file = request.files['file']
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# if user does not select file, browser also
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# submit an empty part without filename
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if file.filename == '':
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flash('No selected file')
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return render_template('index.html')
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if file and allowed_file(file.filename):
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filename = secure_filename(file.filename)
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file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
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return redirect(url_for('uploaded_file',
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filename=filename))
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return render_template('index.html')
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```
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