隱藏欄位介紹 & stateless protocol v.s. stateful protocol
這篇介紹隱藏欄位<input type="hidden">,
HTML 表單隱藏欄位 input type=hidden:
http://www.webtech.tw/info.php?tid=96
整篇都建議看看。
另外也可參考這篇的解答,
Original purpose of <input type=“hidden”>?
http://stackoverflow.com/questions/16293741/original-purpose-of-input-type-hidden
擷取重點如下:
type=hidden
--> These fields should not be rendered and provide a means for servers to store state information with a form.
--> This will be passed back to the server when the form is submitted, using the name/value pair defined by the corresponding attributes.
--> This is a work around for the statelessness of HTTP.
--> Another approach is to use HTTP "Cookies".
再者, 因為提到隱藏欄位, 就需要了解一下stateless protocol & stateful protocol:
這篇講到這兩者的定義,
Stateless Protocol
https://www.techopedia.com/definition/697/stateless-protocol
擷取重點如下:
1. A stateless protocol is a protocol in which each particular communication is handled as an independent event, unrelated to other similar communications.
2. The opposite of stateless protocol is a stateful protocol, where an individual communication is handled as part of a greater set of communications.
另外, 這篇是上面這篇的詳細解釋, 也比較更容易懂兩者用途和差異,
[ASP.NET]Stateful與Stateless
https://dotblogs.com.tw/jimmyyu/2010/10/16/difference-between-stateful-and-stateless
整篇都可以看看, 滿簡明易懂的。
最後, 說明如果要使用stateless protocol要使用什麼方法; 如果要使用stateful protocol要用什麼方法,
Why say that HTTP is a stateless protocol?
http://stackoverflow.com/questions/13200152/why-say-that-http-is-a-stateless-protocol
擷取重點如下:
用stateless protocol時:
HTTP is a stateless protocol. A stateless protocol does not require the server to retain information or status about each user for the duration of multiple requests.
用stateful protocol時:
But some web applications may have to track the user's progress from page to page, for example when a web server is required to customize the content of a web page for a user. Solutions for these cases include:
--> the use of HTTP cookies.
--> server side sessions,
--> hidden variables (when the current page contains a form), and
--> URL-rewriting using URI-encoded parameters, e.g., /index.php?session_id=some_unique_session_code.
HTML 表單隱藏欄位 input type=hidden:
http://www.webtech.tw/info.php?tid=96
整篇都建議看看。
另外也可參考這篇的解答,
Original purpose of <input type=“hidden”>?
http://stackoverflow.com/questions/16293741/original-purpose-of-input-type-hidden
擷取重點如下:
type=hidden
--> These fields should not be rendered and provide a means for servers to store state information with a form.
--> This will be passed back to the server when the form is submitted, using the name/value pair defined by the corresponding attributes.
--> This is a work around for the statelessness of HTTP.
--> Another approach is to use HTTP "Cookies".
再者, 因為提到隱藏欄位, 就需要了解一下stateless protocol & stateful protocol:
這篇講到這兩者的定義,
Stateless Protocol
https://www.techopedia.com/definition/697/stateless-protocol
擷取重點如下:
1. A stateless protocol is a protocol in which each particular communication is handled as an independent event, unrelated to other similar communications.
2. The opposite of stateless protocol is a stateful protocol, where an individual communication is handled as part of a greater set of communications.
另外, 這篇是上面這篇的詳細解釋, 也比較更容易懂兩者用途和差異,
[ASP.NET]Stateful與Stateless
https://dotblogs.com.tw/jimmyyu/2010/10/16/difference-between-stateful-and-stateless
整篇都可以看看, 滿簡明易懂的。
最後, 說明如果要使用stateless protocol要使用什麼方法; 如果要使用stateful protocol要用什麼方法,
Why say that HTTP is a stateless protocol?
http://stackoverflow.com/questions/13200152/why-say-that-http-is-a-stateless-protocol
擷取重點如下:
用stateless protocol時:
HTTP is a stateless protocol. A stateless protocol does not require the server to retain information or status about each user for the duration of multiple requests.
用stateful protocol時:
But some web applications may have to track the user's progress from page to page, for example when a web server is required to customize the content of a web page for a user. Solutions for these cases include:
--> the use of HTTP cookies.
--> server side sessions,
--> hidden variables (when the current page contains a form), and
--> URL-rewriting using URI-encoded parameters, e.g., /index.php?session_id=some_unique_session_code.
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