JavaWeb 1-browser technology, javaweb-Browser

JavaWeb 1-browser technology, javaweb-Browser
JavaWeb 1-browser technology 1. HTTP 1.1 HTTP Definition

HTTP (Hypertext Transport Protocol), Hypertext Transfer Protocol.

A data transfer protocol that specifies the communication rules between browsers and web servers and transmits World Wide web documents over the Internet.

 

1.2 protocol principles

 

 

1.3 request format

* The first part is request line. The method of the package request, the name of the requested resource, and the protocol in use.

* The second part is request headers. It contains some information about the browser.

* The third part is the body. There is an empty line between request headers and body.

 

* METHOD indicates the request METHOD, such as "POST" and "GET ". Path-to-resource indicates the requested resource. HTTP/version-number indicates the version number of the HTTP protocol.

 

 

1.4 Response format

* The first part is response line. It contains the version information and response status of the HTTP protocol.

* The second part is the response header. It includes some basic information about the server.

* The third part is the body. There is also an empty line between the response header and body.

 

 

1.5 receive and send a message instance (Fiddle)

 

Both are vertex headers, so both are the message headers and the body does not.

 

 

Ii. HTML2.1 Definition

HTML (Hypertext Markup Language) is a Markup Language used to describe Web documents.

Is the language used to compile network files.

 

2.2 hyperlink

 

 

2.3 Static Page

A webpage is only organized by HTML code.

 

2.4 dynamic page

HTML + ASP

HTML + PHP

HTML + JSP

 

2.5 form elements

<Form> </form>

2.5.1 text box

* <Input type = "text" name = "text">

2.5.2 single region

* <Input type = "radio" value = "value 1" name = "dxk">

* <Input type = "radio" value = "value 2" name = "dxk">

2.5.3 check box

* <Input type = "checkbox" value = "value 1" name = "dxk">

* <Input type = "checkbox" value = "value 2" name = "dxk">

2.5.4 submit button

* <Input type = "submit" value = "submit">

 

2.6 form Element attributes

* Type attribute: indicates the type of the element. The values include text (text box), checkbox (single button), and button.

* Name attribute: indicates the name of the element and can only have unique values.

* Value attribute: sets the default value of the element.

 

2.7 target address for form submission

 

 

2.8 data submission method

* There is also an attribute method in the form. It indicates the data submission method in the form. It has two optional values: POST and GET.

* POST: package data and transfer it in implicit mode.

* GET: attaches data to a URL and transmits data through the URL.

 

 

Iii. CSS

CSS: Page beautification Technology

3.1 css attributes

 

 

3.2 mouse style attributes

Controls the cursor attribute in CSS.

 

3.3 absolute CSS positioning

 

 

3.4 CSS changes the color of a table