May 12, 2021 Ruby
The following is a list of methods for CGI classes:
| Serial number | Method description |
|---|---|
| 1 |
CGI::new([ level="query"])
Create a CGI object. Q uery can be the following value:
|
| 2 |
CGI::escape( str)
Use URL encoding to escape strings |
| 3 |
CGI::unescape( str)
Decode strings encoded by escape(). |
| 4 |
CGI::escapeHTML( str)
Encode HTML special characters, including: and slt; |
| 5 |
CGI::unescapeHTML( str)
Decode HTML special characters, including: and slt; |
| 6 |
CGI::escapeElement( str[, element...])
Encode HTML special characters in the specified HTML element. |
| 7 |
CGI::unescapeElement( str, element[, element...])
Decode HTML special characters in the specified HTML element. |
| 8 |
CGI::parse( query)
Resolve the query string and return the key value pair that contains the hash. |
| 9 |
CGI::pretty( string[, leader=" "])
Return to the neat HTML format. I f a leader is specified, it is written to the beginning of each line. The leader default is two spaces. |
| 10 |
CGI::rfc1123_date( time)
Format the time according to RFC-1123 (e.g., Tue, 2 Jun 2008 00:00:00 GMT). |
In the following example, we assign CGI::new objects to the c variable, and the list of methods is as follows:
| Serial number | Method description |
|---|---|
| 1 |
c[ name]
Returns an array that contains a value for the corresponding field name name. |
| 2 |
c.checkbox( name[, value[, check=false]])
c.checkbox( options) Returns an HTML string to define the checkbox field. The properties of a label can be passed as an argument by a hash function. |
| 3 |
c.checkbox_group( name, value...)
c.checkbox_group( options) Return html strings to define checkbox groups. The properties of a label can be passed as an argument by a hash function. |
| 4 |
c.file_field( name[, size=20[, max]])
c.file_field( options) Returns the HTML string that defines the file field. |
| 5 |
c.form([ method="post"[, url]]) { ...}
c.form( options) Returns the HTML string that defines the form form. I f a block of code is specified, it is output as form content. The properties of a label can be passed as an argument by a hash function. |
| 6 |
c.cookies
Return CGI:: The cookie object contains the key value pair in the cookie. |
| 7 |
c.header([ header])
Returns the information for the CGI header. If the header parameter is hashed, its key-value pair is used to create header information. |
| 8 |
c.hidden( name[, value])
c.hidden( options) Returns an HTML string that defines a hidden field. The properties of a label can be passed as an argument by a hash function. |
| 9 |
c.image_button( url[, name[, alt]])
c.image_button( options) Returns the HTML string that defines an image button. The properties of a label can be passed as an argument by a hash function. |
| 10 |
c.keys
Returns an array that contains the field name of the form. |
| 11 |
c.key?
( name)
c.has_key? ( name) c.include? ( name) True if the form contains the specified field name. |
| 12 |
c.multipart_form([ url[, encode]]) { ...}
c.multipart_form( options) { ...} Returns the HTML string that defines a multimedia form . The properties of a label can be passed as an argument by a hash function. |
| 13 |
c.out([ header]) { ...}
Generate HTML and output. Use the output of the block to create a string generated by the body of the page. |
| 14 |
c.params
Returns a hash that contains the form field name and value. |
| 15 |
c.params= hash
The setting uses the field name and value. |
| 16 |
c.password_field( name[, value[, size=40[, max]]])
c.password_field( options) Returns the HTML string that defines a password field. The properties of a label can be passed as an argument by a hash function. |
| 17 |
c.popup_menu( name, value...)
c.popup_menu( options) c.scrolling_list( name, value...) c.scrolling_list( options) Returns the HTML string that defines a pop-up menu. The properties of a label can be passed as an argument by a hash function. |
| 18 |
c.radio_button( name[, value[, checked=false]])
c.radio_button( options) Returns the HTML string that defines a radio field. The properties of a label can be passed as an argument by a hash function. |
| 19 |
c.radio_group( name, value...)
c.radio_group( options) Returns the HTML string that defines a group of radio buttons. The properties of a label can be passed as an argument by a hash function. |
| 20 |
c.reset( name[, value])
c.reset( options) Returns the HTML string that defines a reset button. The properties of a label can be passed as an argument by a hash function |
| 21 |
c.text_field( name[, value[, size=40[, max]]])
c.text_field( options) Returns the HTML string that defines a text field. The properties of a label can be passed as an argument by a hash function. |
| 22 |
c.textarea( name[, cols=70[, rows=10]]) { ...}
c.textarea( options) { ...} Returns the HTML string that defines a textarea field. I f a block is specified, the string output of the block will be the content of textarea. The properties of a label can be passed as an argument by a hash function. |
You can then use the appropriate HTML tag name in the CGI instance to create the HTML tag, as follows:
#!/usr/bin/ruby
require "cgi"
cgi = CGI.new("html4")
cgi.out{
cgi.html{
cgi.head{ "\n"+cgi.title{"This Is a Test"} } +
cgi.body{ "\n"+
cgi.form{"\n"+
cgi.hr +
cgi.h1 { "A Form: " } + "\n"+
cgi.textarea("get_text") +"\n"+
cgi.br +
cgi.submit
}
}
}
}
You can then use the following properties in the CGI instance:
| Property | Returns a value |
|---|---|
| accept | Acceptable MIME type |
| accept_charset | The acceptable character set |
| accept_encoding | Acceptable coding |
| accept_language | Acceptable language |
| auth_type | The type that is acceptable |
| raw_cookie | Cookie data (original string) |
| content_length | Content length (Content length) |
| content_type | Content type |
| From | Client e-mail address |
| gateway_interface | CGI version |
| path_info | Path |
| path_translated | The converted path |
| Query_string | The query string |
| referer | Visit the URL before |
| remote_addr | Client Host Address (IP) |
| remote_host | The client host name |
| remote_ident | The client name |
| remote_user | Authenticated users |
| request_method | Request method (GET, POST, etc.). ) |
| script_name | The name of the argument |
| server_name | The name of the server |
| server_port | The server port |
| server_protocol | The server protocol |
| server_software | Server software |
| user_agent | User Agent |