Question

好的，正在努力获得放大解码器。奇怪的问题。如果我有一个附加到我的请求的beforeSend，解码器不会触发。删除beforeSend并解码解码器。

以下是两个例子。

没有发送。

http://jsfiddle.net/sujesharukil/Td2P4/12/

使用beforeSend

http://jsfiddle.net/sujesharukil/Td2P4/14/

有人能告诉我发生了什么事吗？如果我有一个beforeSend，为什么解码器不会工作？我假设解码器应该在收到请求后触发，所以beforeSend不会对它产生任何影响！

注意：stackoverflow要我在这里发布代码，而不仅仅是fiddles



//please check the fiddles

amplify.request({
    resourceId: "testRequest",
    data: {
        json: JSON.stringify({
            text: 'hello world'
        })
    },
    success: function(data, status) {
        console.log(data, status);
        $('.messages').append('<div> text retrieved: ' + data.text + '</div>');
    },
    error: function(status, xhr) {
        console.log(xhr);
    }
});

amplify.request({ resourceId: "testRequest", data: { json: JSON.stringify({ text: 'hello world' }) }, success: function(data, status) { console.log(data, status); $('.messages').append('<div> text retrieved: ' + data.text + '</div>'); }, error: function(status, xhr) { console.log(xhr); } });

帮助？

-Suj

Answer 1

好的，想通了。

在amplifyjs中这一部分引起了我的注意



beforeSend : function( _xhr, _ajaxSettings ) {

                xhr = _xhr;
                ajaxSettings = _ajaxSettings;
                var ret = defnSettings.beforeSend ?
                    defnSettings.beforeSend.call( this, ampXHR, ajaxSettings ) : true;
                return ret && amplify.publish( "request.before.ajax",
                    defnSettings, settings, ajaxSettings, ampXHR );
            }
        });

beforeSend : function( _xhr, _ajaxSettings ) { xhr = _xhr; ajaxSettings = _ajaxSettings; var ret = defnSettings.beforeSend ? defnSettings.beforeSend.call( this, ampXHR, ajaxSettings ) : true; return ret && amplify.publish( "request.before.ajax", defnSettings, settings, ajaxSettings, ampXHR ); } });

请注意，如果指定了它，它将调用beforeSend，否则将设置为var ret

如果设置为true，则会发布var ret

在文件中向下，放大侦听此消息

true

"request.before.ajax"

所以，如果你有一个beforeSend，如果它没有返回true，那么该消息永远不会被发布，并且解码器永远不会被击中！

解决方案？

从beforeSend函数返回true

"request.before.ajax"

amplify.subscribe( "request.before.ajax", function( resource, settings, ajaxSettings, ampXHR ) {
var _success = ampXHR.success,
    _error = ampXHR.error,
    decoder = $.isFunction( resource.decoder )
        ? resource.decoder
        : resource.decoder in amplify.request.decoders
            ? amplify.request.decoders[ resource.decoder ]
            : amplify.request.decoders._default;

if ( !decoder ) {
    return;
}

function success( data, status ) {
    _success( data, status );
}
function error( data, status ) {
    _error( data, status );
}
ampXHR.success = function( data, status ) {
    decoder( data, status, ampXHR, success, error );
};
ampXHR.error = function( data, status ) {
    decoder( data, status, ampXHR, success, error );
};

});

就像一个魅力！希望这有助于其他人试图解决这个问题！

Answer 2

刚刚从示例页面复制了这个。希望它有所帮助。

amplify.request.decoders.appEnvelope =
    function ( data, status, xhr, success, error ) {
        if ( data.status === "success" ) {
            success( data.data );
        } else if ( data.status === "fail" || data.status === "error" ) {
            error( data.message, data.status );
        } else {
            error( data.message , "fatal" );
        }
    };

amplify.request.define( "decoderExample", "ajax", {
    url: "/myAjaxUrl",
    type: "POST",
    decoder: "appEnvelope" // <--- a function name(string) and not a function.
});

amplify.request({
    resourceId: "decoderExample",
    success: function( data ) {
        data.foo; // bar
    },
    error: function( message, level ) {
        alert( "always handle errors with alerts." );
    }
});

在发送之前放大解码器和ajax

2 个答案: