PRADA Lab

Introduction

POST

it's a simple solution for transmission data to server, and server can capture the value by pair-element(like php, $_POST['company'])

Example from J2ME

try {

    HttpConnection c = (HttpConnection)Connector.open(URL);

    c.setRequestMethod(HttpConnection.POST);

    c.setRequestProperty("Content-Type","application/x-www-form-urlencoded");//MUST

    String msg = "uuid=444566&imei=9ddd999&jblend_license=2223";

    byte[] data = msg.getBytes();

    for(int x=0;x<data.length;x++)

        System.out.print(data[x]+",");

    c.setRequestProperty("Content-length",""+msg.getBytes().length);//MUST

    OutputStream os = c.openOutputStream();

    os.write(data);

    os.flush();

    int rc = c.getResponseCode();

    System.out.println(""+rc);

} catch (IOException e) {

    System.out.println("IOException:"+e.getMessage());

}

XML (eXtensible Markup Language)

XML design for describing data.
it's Rich Documents : easy to describe the complex structure
it's Metadata
it's Configuration Files : using to set software parameter

Example

<?xml version="1.0"?>

<note>

    <to>Tove</to>

    <from>Jani</from>

    <heading>Reminder</heading>

    <body>Don't forget me this weekend!</body>

</note>

who use XML
ANT, Android's layout ... etc

JSON(JavaScript Object Notation)

it's a light-weight language for exchange data. the JavaScript can easy read it by eval(). but it's not only for JavaScript

Example

{"2": {"nick_name": "kan", "full_name": "Kan Kan"}, "4": {"nick_name": "mitsuhiko", ...}, ...}

who use JSON
plurk, facebook, twitter

YAML(YAML Ain't Markup Language)

wiki

Example

Name: Gary

Profile:

    Birth: 1975-04-43

    Addr:

        - City: Taipei

          Road: Chung-Shoang

          Number: 20

          Flood: 3

        - City: TaoYuan

          Road: LongChung

          Number: 10

          Flood: 2

    Blood Type: A

Score: 0.98

Who use YAML
Google app engine(configure file)

Suggestion Architecture

Server -> Client : JSON or XML
Client -> Server : POST

For example, the PLURK API for search function:

/API/PlurkSearch/search

Returns the latest 20 plurks on a search term.
Required parameters:
- api_key: Your Plurk API key.
- query: The query after Plurks.
Optional parameters:
- offset: A plurk_id of the oldest Plurk in the last search result.
Successful return:
A JSON list of plurks that the user have permissions to see:

[{"id": 3, "content": "Test", "qualifier_translated": "says", "qualifier": "says", ...}, ...]

Result

table. the result of comparing each format

	POST	XML	JSON	YAML
readability	low	high	median	high
performance	high	low	median	median-high
security	low	high	median	median

security : parser for checking well-form

Conclusion

the purpose of stage activation get report on server(grails)
it's not complication structure(tree or nest)
it's not need to high readability
it's not need to easy to integrate each platform(like different web-platform, mobile...)
it's only good at security

PRADA Lab

2013年5月10日星期五

[Android] The Bug of Set the different drawable for ProgressBar

2013年1月17日星期四

Study network transmission format

Introduction

POST

XML (eXtensible Markup Language)

JSON(JavaScript Object Notation)

YAML(YAML Ain't Markup Language)

Suggestion Architecture

/API/PlurkSearch/search

Result

Conclusion

關於我自己

網誌存檔

2013年5月10日 星期五

[Android] The Bug of Set the different drawable for ProgressBar

2013年1月17日 星期四

Study network transmission format

Introduction

POST

XML (eXtensible Markup Language)

JSON(JavaScript Object Notation)

YAML(YAML Ain't Markup Language)

Suggestion Architecture

/API/PlurkSearch/search

Result

Conclusion

2013年5月10日星期五

2013年1月17日星期四