Flask框架编写文件下载接口过程讲解

@app.route("/download1")
def download():
    # return send_file('test.exe', as_attachment=True)
    return send_file('2.jpg')
    # return send_file('1.mp3')

@app.route("/download2")
def download2():
    file_name = "1.jpg"
    #https://www.runoob.com/http/http-content-type.html
    response = Response(file_send(file_name), content_type='image/jpeg')
    response.headers["Content-disposition"] = f'attachment; filename={file_name}'
    return response

from flask import Flask,send_file,Response
from flask_cors import CORS
app = Flask(__name__)
CORS(app,resources={r"/*": {"origins": "*"}},supports_credentials=True)
@app.route("/download1")
def download():
    # return send_file('test.exe', as_attachment=True)
    # return send_file('2.jpg')
    return send_file('1.mp3')
    # filefold file
    # return send_from_directory('./', 'test.exe', as_attachment=True)
# send big file
def file_send(file_path): 
    with open(file_path, 'rb') as f:
        while 1:
            data = f.read(20 * 1024 * 1024)  # per 20M
            if not data:
                break
            yield data
@app.route("/download2")
def download2():
    file_name = "1.jpg"
    response = Response(file_send(file_name), content_type='image/jpeg')
    response.headers["Content-disposition"] = f'attachment; filename={file_name}'
    return response
if __name__ == '__main__':
    app.config['JSON_AS_ASCII'] = False
    app.run(debug=True)