文件上传

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在静态目录下创建名为 upload 的目录作为上传文件存储目录

配置

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
def allowed_file(filename):
    return "." in filename and filename.rsplit(".", 1)[1] in DefaultConfig.ALLOWED_EXTENSIONS
    
# 原生文件上传 
# 上传路径 
UPLOAD_FOLDER = os.path.join(BASE_DIR, "static/media")
# 配置上传文件的最大尺寸，默认不受限制 
MAX_CONTENT_LENGTH = 1024 * 1024 * 2
# 设置允许上传文件的类型 
ALLOWED_EXTENSIONS = ["jpg","png","jpeg","gif"]
# 验证是否允许上传，允许返回 True，否则返回 False
IS_ALLOWED_FUNC = allowed_file

上传界面

upfile.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title> 上传文件 </title>
</head>
<body>
    <form action="/upfile/" method="post" enctype="multipart/form-data">
        <input type="file" name="file"><br/>
        <input type="submit" value="上传">
    </form>
</body>
</html>

request.files

ImmutableMultiDict([('file', <FileStorage: 'a.txt' ('text/plain')>)])

视图

# 原生文件上传视图 
@main.route('/upload/', methods=['GET', 'POST'])
def upload():
    if request.method == 'GET':
        return render_template('upload.html')
    else:
        # 获取上传文件对象 
        file = request.files.get('file')
        filename = file.filename  # 获取文件名称 
        if not current_app.config['IS_ALLOWED_FUNC'](filename):
            return '该文件类型不允许上传'
        filePath = os.path.join(current_app.config['UPLOAD_FOLDER'], filename)
        file.save(filePath)
        return '文件上传成功'

安装

pip install flask-uploads

创建

from flask_uploads import UploadSet
from flask_uploads import TEXT, IMAGES
# 与配置文件要对应    限制上传类型 
uploads = UploadSet("UPLOADS", extensions=IMAGES)

from .ext_uploads import uploads

加载

from exts import uploads
from flask_uploads import configure_uploads
from flask_uploads import patch_request_class

# 加载上传三方对象 
configure_uploads(app, uploads)
# 配置上传文件的大小，默认 64M，如果 size 设置为 None，会读取 MAX_CONTENT_LENGTH 配置的值 
patch_request_class(app, size=None)

配置

# 上传文件 
UPLOADED_UPLOADS_DEST = os.path.join(BASE_DIR, "static/media")
MAX_CONTENT_LENGTH = 2 * 1024 * 1024
# UPLOADED_UPLOADS_URL = "http://127.0.0.1:5000:8000/static/media/"

示例

from exts import uploads
from flask_uploads import UploadNotAllowed

@myApp.route("/upfile/", methods=["GET", "POST"])
def upfile():
    if request.method == "GET":
        return render_template("upfile.html")
    else:
      	file = request.files.get('file')
        # 获取保存文件的 url
        img_url = uploads.url(file.filename)
        print(img_url)
        try:
            uploads.save(file, name=file.filename)
        except UploadNotAllowed as e:
            pass
        return "上传文件成功"