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Example of JSON data for cross-origin javascript calls

Source: Internet
Author: User
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If we use the original javascript cross-origin to call JSON data, we use createElement and dynamic to add a remote data interface to src. Now we can also use jquery ajax getjson for an instance.

Original js writing

The Code is as follows: Copy code

<Script type = "text/javascript">
Function urljson (o ){
// O = eval ('+ o + ')');
For (var I in o ){
Alert (I + ":" + o); // cyclically Outputs a: 1, B: 2, etc.
}
}
Var jsonp = document. createElement ("script ");
Jsonp. type = "text/javascript ";
Jsonp. src = "http://www.a.com/1/a.txt ";
Document. getElementsByTagName ("head") [0]. appendChild (jsonp); // JSON data for cross-origin calls
// Urljson ("{msg: 'This is json data'}"); // calls the urljson function like this for local data.

</Script>

Remote End

The Code is as follows: Copy code


Urljson ({msg: 'This is json data '})

The local name of urljson must be the same as that of the remote device, and can be dynamically generated.

Or the following (

The JavaScript link must be under the function.
)

The Code is as follows: Copy code

<Meta content = "text/html; charset = UTF-8" http-equiv = "Content-Type"/>
<Script type = "text/javascript">
Function jsonpCallback (result ){
Alert (result. );
Alert (result. B );
Alert (result. c );
For (var I in result ){
Alert (I + ":" + result); // cyclically Outputs a: 1, B: 2, etc.
}
}
</Script>

<Script type = "text/javascript" src = "http://www.a.com/1/a.txt"> </script>


Jquery. getJSON cross-origin call data


Method definition: jQuery. getJSON (url, data, callback)
Get json data through get request
· Url is used to provide the address page of json data
· Data (Optional) is a key-value pair that is sent to the server.
· Callback (Optional) callback function, the processing function after the json data request is successful

The Code is as follows: Copy code
Function (data, textStatus ){
// Data is a json object
// TextStatus will be "success"
This; // the options for this ajax request
}

 


(1) An object

The Code is as follows: Copy code

$. GetJSON (
"Webdata/Json_1.ashx ",
Function (data ){
$ ("# Divmessage"). text (data. CustomerName );
}
);
 


Request json data from the Json_1.ashx address. After receiving the data, process the data in the function. The data here is a record, corresponding to a customer instance, where the data exists in k/V format. It exists as an array of [object, object.
{"Unid": 1, "CustomerName": "", "Memo": "", "Other": ""}

Therefore, data. Property is used for access. The following uses a k/v loop to print the song river record:

The Code is as follows: Copy code


$. GetJSON (
"Webdata/Json_1.ashx ",
Function (data ){
Var tt = "";
$. Each (data, function (k, v ){
Tt + = k + ":" + v + "<br/> ";
})
$ ("# Divmessage" 2.16.html (tt );
});

 
Result:
Unid: 1
CustomerName: Song Jiang
Memo: Tian kuixing
Other: Hei sanlang
(2) object Array

Example

The Code is as follows: Copy code


<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
<Title> test document </title>
<Script type = "text/javascript" src = "/javascript/jquery-1.4.2.min.js"> </script>
</Head>

<Body>
<Script language = "javascript" type = "text/javascript">
Function getjs ()
{
$. GetJSON ("aaa. php? Module = yes & rid = "+ Math. random (), {ids: [111,222,333,444,555]. join (", ")}, function (data ){
For (var I = 0; I <data. length; I ++ ){
Alert (data [I]. id );
}
});
}
</Script>
<Input type = "button" value = "test" onClick = "javascript: getjs ();"/>
</Body>
</Html>

 

<? Php
$ Ids = $ _ GET ["ids"];
$ Ids = explode (',', $ ids );
// $ Arr = array ("name" => "name", "age" => 20, 'A' => $ ids );
$ Arr = array ();
$ Arr [] = array ('id' => $ ids [0], 'price _ right' => '0. 00', 'Time _ now '=> '000000', 'U _ name_now' => 'abc', 'state' => '1 ', 'iddisabled '=> '0 ');
$ Arr [] = array ('id' => $ ids [1], 'price _ right' => '0. 00', 'Time _ now '=> '000000', 'U _ name_now' => 'abc', 'state' => '1 ', 'iddisabled '=> '0 ');
$ Arr [] = array ('id' => $ ids [2], 'price _ right' => '0. 00', 'Time _ now '=> '000000', 'U _ name_now' => 'abc', 'state' => '1 ', 'iddisabled '=> '0 ');
$ Arr [] = array ('id' => $ ids [3], 'price _ right' => '0. 00', 'Time _ now '=> '000000', 'U _ name_now' => 'abc', 'state' => '1 ', 'iddisabled '=> '0 ');
$ Arr [] = array ('id' => $ ids [4], 'price _ right' => '0. 00', 'Time _ now '=> '000000', 'U _ name_now' => 'abc', 'state' => '1 ', 'iddisabled '=> '0 ');
$ Jarr = json_encode ($ arr );
Echo $ jarr;
?>

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