使用Python发布前获取文件大小

Question

我在Flask服务器上有一个API，可以使用以下代码从客户端上载文件：

@app.route('/api/uploadJob', methods = ['GET', 'POST'])
def uolpadJob():
    try:
        if request.method == 'POST':                
            f = request.files['file']
            fullFilePath = os.path.join(app.config['UPLOAD_FOLDER'],
                secure_filename(f.filename))                    
            #fileSize = ???
            f.save(fullFilePath)

我想先获取文件大小，然后再将其保存到硬盘中，以便可以将其与可用磁盘空间进行比较，然后选择要保存还是返回错误消息。在实际上传之前如何获取文件大小？

Answer 1

如果要在保存之前检查尺寸的详细信息，这可能会有所帮助：

@app.route('/api/uploadJob', methods = ['GET', 'POST'])
def uolpadJob():
    try:
        if request.method == 'POST':                
            f = request.files['file']
            fullFilePath = os.path.join(app.config['UPLOAD_FOLDER'],
                secure_filename(f.filename))                    
            f.seek(0, 2)
            file_length = f.tell()
            # Introduce your disk space condition and save on basis of that
            f.save(fullFilePath)

但是，如果您想在将文件保存到指定路径后进行检查，请尝试以下操作：

@app.route('/api/uploadJob', methods = ['GET', 'POST'])
def uolpadJob():
    try:
        if request.method == 'POST':                
            f = request.files['file']
            fullFilePath = os.path.join(app.config['UPLOAD_FOLDER'],
                secure_filename(f.filename))                    
            f.save(fullFilePath)
            fileSize = os.stat(fullFilePath).st_size