The best Ruby CGI method Tutorial In 2024, In this tutorial you can learn CGI instance method,HTML Generation,CGI object properties,
The following is a list of methods CGI class:
No. | Method Description |
---|---|
1 | CGI :: new ([level = " query"]) Create CGI object. query can be the following values:
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2 | CGI :: escape (str) URL-encoded string to escape |
3 | CGI :: unescape (str) Through the escape () to decode the encoded string. |
4 | CGI :: escapeHTML (str) Coding HTML special characters, including: & <>. |
5 | CGI :: unescapeHTML (str) Decode special HTML characters, including: & <>. |
6 | CGI :: escapeElement (str [, element /en.]) Coding HTML special characters in the specified HTML element. |
7 | CGI :: unescapeElement (str, element [ , element /en.]) Decode special HTML characters in the specified HTML element. |
8 | CGI :: parse (query) Parse the query string and returns a hash containing key = "value pairs. |
9 | CGI :: pretty (string [, leader = ""]) Back neat HTML format. If you specify aleader,it is written to the beginning of each line.leaderdefault is two spaces. |
10 | CGI :: rfc1123_date (time) According to RFC-1123 format time (for example, Tue, 2 Jun 2008 00:00:00 GMT). |
The following examples will CGI :: new object assigned to the variable c, methods listed below:
No. | Method Description |
---|---|
1 | c [name] It returns an array that contains the value of the corresponding field namedname. |
2 | c.checkbox (name [, value [, check = false]]) c.checkbox (options) Returns an HTML string that defines the checkbox field. Property of the label may be a hash function passed as a parameter. |
3 | c.checkbox_group (name, value /en.) c.checkbox_group (options) > Returns HTML string used to define the checkbox group. Property of the label may be a hash function passed as a parameter. |
4 | c.file_field (name [, size = 20 [, max]]) c.file_field (options) Returns the definition file field HTML string. |
5 | c.form ([method = "post" [, url]]) {/en.} c.form (options) Back defined form form HTML string. If a block is specified, the output as the contents of the form. Property of the label may be a hash function passed as a parameter. |
6 | c.cookies Back CGI :: Cookie object containing the cookie in pairs. |
7 | c.header ([header]) Back CGI header information. If the header argument is a hash value, which is the key - value pairs are used to create the header information. |
8 | c.hidden (name [, value]) c.hidden (options) Returns an HTML string to define a hidden field. Property of the label may be a hash function passed as a parameter. |
9 | c.image_button (url [, name [, alt]]) c.image_button (options) Back to define a string of HTML image button. Property of the label may be a hash function passed as a parameter. |
10 | c.keys It returns an array that contains a form field names. |
11 | c.key? (name) c.has_key? (name) c.include? (name) If the form contains the specified field name returns true. |
12 | c.multipart_form ([url [, encode] ]) {/en.} c.multipart_form (options) {/en.} Back define a multimedia forms (multipart) HTML string. Property of the label may be a hash function passed as a parameter. |
13 | c.out ([header]) {/en. } And generates HTML output. Output block used by the body to create a page generated string. |
14 | c.params Returns hash contains form field names and values. |
15 | c.params = hash Setting using field names and values. |
16 | c.password_field (name [, value [, size = 40 [, max]]]) c.password_field (options) Back define a password field HTML string. Property of the label may be a hash function passed as a parameter. |
17 | c.popup_menu (name, value /en.) c.popup_menu (options) c.scrolling_list (name, value /en.) c.scrolling_list (options) Returns a pop-up menu to define the HTML string. Property of the label may be a hash function passed as a parameter. |
18 | c.radio_button (name [, value [, checked = false]]) c.radio_button (options) Returns a string of HTML defined radio field. Property of the label may be a hash function passed as a parameter. |
19 | c.radio_group (name, value /en.) c.radio_group (options) Returns a string defined HTML radio button group. Property of the label may be a hash function passed as a parameter. |
20 | c.reset (name [, value]) c.reset (options) Define a reset button to return HTML string. Property of the label may be a hash function as an argument |
twenty one | c.text_field (name [, value [, size = 40 [, max]]]) c.text_field (options) Returns an HTML string fields defined text. Property of the label may be a hash function passed as a parameter. |
twenty two | c.textarea (name [, cols = 70 [, rows = 10]]) {/en.} c.textarea (options) {/en.} Returns a string defined HTML textarea field. If you specify a block, a block of code strings output as the content of the textarea. Property of the label may be a hash function passed as a parameter. |
You can then use the appropriate CGI example HTML tag names to create HTML tags, examples are as follows:
#!/usr/bin/ruby require "cgi" cgi = CGI.new("html4") cgi.out{ cgi{ 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 CGI instance the following properties:
Attributes | return value |
---|---|
accept | Acceptable MIME type |
accept_charset | Acceptable character sets |
accept_encoding | Acceptable coding |
accept_language | Acceptable language |
auth_type | Acceptable Types |
raw_cookie | Cookie data (original string) |
content_length | Content length (Content length) |
content_type | Content type (Content type) |
From | Client e-mail address |
gateway_interface | CGI version |
path_info | path |
path_translated | After the conversion path |
Query_string | Query String |
referer | Before accessing the URL |
remote_addr | Client host address (IP) |
remote_host | Client hostname |
remote_ident | Client name |
remote_user | Authenticated users |
request_method | Request method (GET, POST, etc.) |
script_name | Parameter name |
server_name | server name |
server_port | Server port |
server_protocol | Server protocol |
server_software | Server Software |
user_agent | User Agent (User agent) |