Question

OpenLayers的默认策略是固定的。例如见：

http://openlayers.org/dev/examples/sundials.html

var sundials = new OpenLayers.Layer.Vector("KML", {
            projection: map.displayProjection,
            strategies: [new OpenLayers.Strategy.Fixed()],
            protocol: new OpenLayers.Protocol.HTTP({
                url: "kml/sundials.kml",
                format: new OpenLayers.Format.KML({
                    extractStyles: true,
                    extractAttributes: true
                })
            })
        });

是否可以传递回调来处理协议错误？如果我使用低级GET请求，我可以很容易地做到这一点，例如：

var loadkml = function() {
      OpenLayers.Request.GET({
          url: "kml/sundials.kml",
          success: parseData,
          failure: function(req) { alert(req.responseText); }
      });
  }

但我不想实施一个全新的策略，固定没问题。

Answer 1

OpenLayers.Protocol.HTTP协议接受callback个选项：

Function to be called when the <read>, <create>, <update>, <delete> or <commit> operation completes

但该函数永远不会被调用，bug报告：https://github.com/openlayers/openlayers/pull/81

固定策略：它可以处理协议错误吗？

1 个答案: