What is the use of the enctype field when uploading files?

The enctype attribute of the FORM element specifies the encoding type used when the form data is submitted to the server. The default value is "application/x-www-form-urlencoded".

This encoding method will urlencode the content before the form is sent. (Spaces are converted to "+", and special characters are converted to ASCII HEX values).

For example, in the form field

Fill in bb for firstname,,

The result before sending is: bb+%2C%2C

However, this encoding is inefficient when sending large amounts of text, text containing non-ASCII characters, or binary data to a server.

When uploading files, the encoding type used should be "multipart/form-data", which can send both text data and binary data upload.

The ENCTYPE attribute value of the <form> form on the browser side is multipart/form-data, which tells us that the transmitted data must use the multimedia transmission protocol. Since multimedia transmission involves large amounts of data, the uploaded file must be the post method, and the type attribute of <input> must be file.

Solution to the problem that MySQL can be started when installed in WAMP but cannot be started after restart

Blog

What is the use of the enctype field when uploading files?

The solution to the page not refreshing after the route changes after react jumps

How to clear the cache after using keep-alive in vue

Solution to the problem of returning 0x1 when the Windows 2008 task plan fails to execute a bat script

Explanation on the use and modification of Tomcat's default program publishing path

Vue parent-child component mutual value transfer and call

Examples of MySQL and Python interaction

Solution to invalid Nginx cross-domain setting Access-Control-Allow-Origin

Analysis of the methods of visual structure layout design for children's websites

Implementation of tomcat image created with dockerfile based on alpine

Solution to the problem that MySQL can be started when installed in WAMP but cannot be started after restart

Recommend

Introduction to JavaScript strict mode use strict

How to turn a jar package into a docker container

Analysis of the implementation process of three modes of VMWare network adapter

Detailed explanation of scroll bar scrolling control of DOM elements in HTML

Detailed explanation of the process of using GPU in Docker

HTML pop-up div is very useful to realize mobile centering

Example of CSS3 to achieve div sliding in and out from bottom to top

How to set PATH environment variable in Linux system (3 methods)

Example of automatic import method of vue3.0 common components

React uses emotion to write CSS code

Using radial gradient in CSS to achieve card effect

Three useful codes to make visitors remember your website

Vue Router vue-router detailed explanation guide

Windows Server 2008 Tutorial on Monitoring Server Performance

In-depth analysis of MySQL lock blocking