How to reset the file.stream in flask / werkzeug?
It seems to me, that you cannot access file.stream.read() after the file has been written with file.save('path',filename') and vice versa.
Example code (derived from the file uploading pattern):
import os
from flask import Flask, request, redirect, url_for, send_from_directory
from werkzeug import secure_filename
UPLOAD_FOLDER = 'uploads/'
ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif'])
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
def allowed_file(filename):
return '.' in filename and \
filename.rsplit('.', 1)[1] in ALLOWED_EXTENSIONS
@app.route('/', methods=['GET', 'POST'])
def upload_file():
if request.method == 'POST':
file = request.files['file']
if file and allowed_file(file.filename):
filename = secure_filename(file.filename)
print '##########################'
print os.path.join(app.config['UPLOAD_FOLDER'],filename)
file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
print file.stream.read() # <- gives no output
print '##########################'
return redirect(url_for('uploaded_file',
filename=filename))
return '''
<!doctype html>
<title>Upload new File</title>
<h1>Upload new File</h1>
<form action="" method=post enctype=multipart/for开发者_如何学编程m-data>
<p><input type=file name=file>
<input type=submit value=Upload>
</form>
'''
@app.route('/uploads/<filename>')
def uploaded_file(filename):
return send_from_directory(app.config['UPLOAD_FOLDER'],
filename)
if __name__ == '__main__':
app.run(debug=True)
You should be able to seek back to the start of the stream. (See Werkzeug's docs on werkzeug.datastructures.FileStorage). When you try to read the file a second time you start reading from the end of the file.
file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
file.stream.seek(0) # Go back to the start of the file
print file.stream.read() # <- should work now.
加载中,请稍侯......
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