我有一个愚蠢的问题，但我是新手。我正在尝试使用 extjs4 库发出跨域请求（通过 ajax）。作为服务器端语言，我使用的是 ColdFusion。到目前为止，我编写的整个代码都在同一个域上工作。我需要将静态文件（javascript、css 和 html）放在 Apache 服务器上，将动态内容（cfm、CFC）放在 Tomcat（openbd）上。因此前端脚本（主要在 Apache->javascript 上）在 Tomcat 上发出请求以获取内容。这绝对是跨域请求。
我用来提取数据（CFC）的代码块是：
<cfcomponent output="false">
<cfprocessingdirective pageencoding="utf-8">
<cfset setEncoding("URL", "utf-8")>
<cffunction name="getContent" access="remote" returnFormat="JSON" output="false" >
<cfargument name="start" default="0"/>
<cfargument name="limit" default="1000"/>
<cfargument name="id" default="0" required="false" type="numeric">
<cfargument name="model" default="" required="false" type="any">
<cfset var arrNomoi = ArrayNew(1)>
<cfset var stcReturn = "">
<!--- When going back to base state, ExtJS will make the function call with start set to 0. If this is the case
we set it to 1 --->
<cfset Arguments.start = Arguments.start + 1>
<cfif arguments.model EQ 'n_2664_1998'>
<cfquery name="getNomoi" datasource="ktimatologio">
SELECT CONCAT_WS('_',id,model) AS id, id AS 'id1', CONCAT_WS(' ',title,fek,date) AS 'title', description, body, model
FROM n_2664_1998
WHERE id = #arguments.id#
ORDER BY id ASC
</cfquery>
<cfelseif arguments.model EQ 'n_2308_1995'>
<cfquery name="getNomoi" datasource="ktimatologio">
SELECT CONCAT_WS('_',id,model) AS id, id AS 'id1', CONCAT_WS(' ',title,fek,date) AS 'title', description, body, model
FROM n_2308_1995
WHERE id = #arguments.id#
ORDER BY id ASC
</cfquery>
<cfelseif arguments.model EQ 'n_3889_2010'>
<cfquery name="getNomoi" datasource="ktimatologio">
SELECT CONCAT_WS('_',id,model) AS id, id AS 'id1', CONCAT_WS(' ',title,fek,date) AS 'title', description, body, model
FROM n_3889_2010
WHERE id = #arguments.id#
ORDER BY id ASC
</cfquery>
</cfif>
<cfset arrNomoi = convertQueryToExtJS(getNomoi,Arguments.start,Arguments.limit)>
<cfset stcReturn = {"data"=arrNomoi,dataset=#getNomoi.RecordCount#}>
<cfreturn stcReturn>
</cffunction>
<cffunction name="convertQueryToExtJS" access="public" hint="Convert Query to JSON usable by ExtJS Grid" returntype="array">
<cfargument name="qryData" type="query" required="true" hint="Query to convert">
<cfargument name="intStart" type="numeric" required="true" hint="Start of Result Set">
<cfargument name="intLimit" type="numeric" required="true" hint="How many records to return">
<!--- For the Array --->
<cfset var i = 1>
<cfset var end = ((Arguments.intStart) + arguments.intLimit)-1>
<cfset var arrNomoi = ArrayNew(1)>
<cfloop query="qryData" startrow="#Arguments.intStart#" endrow="#end#">
<cfset stcNomoi = StructNew()>
<cfset stcNomoi['id'] = #qryData.id#>
<cfset stcNomoi['id1'] = #qryData.id1#>
<cfset stcNomoi['title'] = #qryData.title#>
<!---<cfset stcNomoi['fek'] = #qryData.fek#>
<cfset stcNomoi['date'] = #qryData.date#>--->
<cfset stcNomoi['description'] = #qryData.description#>
<cfset stcNomoi['body'] = #qryData.body#>
<cfset stcNomoi['model'] = #qryData.model#>
<cfset arrNomoi[i] = stcNomoi>
<cfset i = i + 1>
</cfloop>
<cfreturn arrNomoi>
</cffunction>
</cfcomponent>
问题是：如何将上述函数包装成一个变量（名为“回调”）并将其发布到客户端？
我在 PHP 上看到过类似的代码块，但我不明白。下面是 PHP 代码块：
<?php
$callback = $_REQUEST['callback'];
// Create the output object.
$output = array('id' => 1, 'url' => 'loianegroner.com');
//start output
if ($callback) {
header('Content-Type: text/javascript');
echo $callback . '([' . json_encode($output) . ']);';
} else {
header('Content-Type: application/x-json');
echo json_encode($output);
}
?>
尊重地，
汤姆
希腊