import os
from flask import Flask, request, redirect, url_for, send_from_directory
from werkzeug.utils import secure_filename
UPLOAD_FOLDER = '/tmp/flask-upload-test/'
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':
        # check if the post request has the file part
        if 'file' not in request.files:
            print 'no file'
            return redirect(request.url)
        file = request.files['file']
        # if user does not select file, browser also
        # submit a empty part without filename
        if file.filename == '':
            print 'no filename'
            return redirect(request.url)
        if file and allowed_file(file.filename):
            filename = secure_filename(file.filename)
            file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
            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/form-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)

上傳測(cè)試

$ curl -F 'file=@"foo.png";filename="bar.png"' 127.0.0.1:5000

注意：使用上傳文件功能的時(shí)候使用 POST form-data，參數(shù)名就是參數(shù)名（一般會(huì)提前約定好，而不是變化的文件名），參數(shù)的值是一個(gè)文件（這個(gè)文件正常是有文件名的）。

上傳臨時(shí)文件

有時(shí)候腳本生成了要上傳的文件，但并沒有留在本地的需求，所以使用臨時(shí)文件的方式，生成成功了就直接上傳。

使用 tempfile

tempfile 會(huì)在系統(tǒng)的臨時(shí)目錄中創(chuàng)建文件，使用完了之后會(huì)自動(dòng)刪除。

import requests
import tempfile
url = 'http://127.0.0.1:5000'
temp = tempfile.NamedTemporaryFile(mode='w+', suffix='.txt')
try:
    temp.write('Hello Temp!')
    temp.seek(0)
    files = {'file': temp}
    r = requests.post(url, files=files, proxies=proxies)
finally:
    # Automatically cleans up the file
    temp.close()

使用 StringIO

或者直接使用 StringIO，可以直接在內(nèi)存中完成整個(gè)過程。

import requests
from StringIO import StringIO
url = 'http://127.0.0.1:5000'
temp = StringIO()
temp.write('Hello Temp!')
temp.seek(0)
temp.name = 'hello-temp.txt'    # StringIO 的實(shí)例沒有文件名，需要自己手動(dòng)設(shè)置，不設(shè)置 POST 過去那邊的文件名會(huì)是 'file'
files = {'file': temp}
r = requests.post(url, files=files)

其他

補(bǔ)上發(fā)現(xiàn)的一段可以上傳多個(gè)同名附件的代碼：

files = [
    ("attachments", (display_filename_1, open(filename1, 'rb'),'application/octet-stream')),
    ("attachments", (display_filename_2, open(filename2, 'rb'),'application/octet-stream'))
]
r = requests.post(url, files=files, data=params)

參考

10.6. tempfile — Generate temporary files and directories — Python 2.7.12 documentation

以上就是Python Flask 上傳文件測(cè)試示例的詳細(xì)內(nèi)容，更多關(guān)于Python Flask上傳文件測(cè)試的資料請(qǐng)關(guān)注腳本之家其它相關(guān)文章！

您可能感興趣的文章: