How do I return JSON from an action in FW/1?

问题

FW/1 seems to be oriented to returning complete web pages what if JSON data is needed? A typical layout looks like:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
   <title>User Manager</title>
   <link rel="stylesheet" type="text/css" href="assets/css/styles.css" />
</head>
<body>


<h1>User Manager</h1>

<ul class="nav horizontal clear">
<li><a href="index.cfm">Home</a></li>
<li><a href="index.cfm?action=user.list" title="View the list of users">Users</a></li>
<li><a href="index.cfm?action=user.form" title="Fill out form to add new user">Add User</a></li>
<li><a href="index.cfm?reload=true" title="Resets framework cache">Reload</a></li>
</ul>

<br />

<div id="primary">
    <cfoutput>#body#</cfoutput>
</div>

</div>

</body>
</html>

回答1:

I have used code that overrides the onMissingView() method of Framework.cfc.

I wrap my response up in a variable named rc.json then use code similar to this in my Application.cfc.

function onMissingView( rc ){
    if( structKeyExists( rc, 'json' ){
        var response = getPageContext().getresponse()
        response.setContentType( 'application/json' );
        return serializeJSON( rc.json );
    }
    else{
        //we need this to fire off valid onMissignView error.
        raiseException( "FW1.viewNotFound", "Unable to find a view for '#request.action#' action.", " '#request.missingView#' does not exist.");
    }
}

I use other logic to do a cfdump of rc.json when request is not an AJAX request. But this is scaled down to bare minimum.

回答2:

As of FW/1 2.2, you can call:

variables.fw.renderData( "json", result );

in your controller and it will do what you want.

回答3:

This will do it

 <!--- Load all variables into response rather than just rc --->
 <cfparam name="rc.response" default="#structNew()#">
 <cfparam name="rc.response.status" default="OK">

 <!--- Stop layouts from cascading --->
 <cfset request.layout = false>

 <cfsetting showDebugOutput="No">
 <cfheader name="Content-Type" value="application/json" />

  <cfoutput>#SerializeJSON(rc.response)#</cfoutput>

来源：https://stackoverflow.com/questions/18448717/how-do-i-return-json-from-an-action-in-fw-1

标签

json

coldfusion

fw1