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II. Single Case ModeThese weapons are powerful and cruel, just like the weapons that the National Security Agency wants. Of course, the US National Security Agency does not intend to end the matter. As Ben Oni lamented to the New York Times, "If you can't catch it, it will happen under our eyes."126-130早啊。SNMP magnification attackThe first scheme is to use the general coding method to realize the preloading technology of the picture. First, create the imgNode element, Then when the method myImage.setSrc is called, a preloaded picture is given to the picture first, and when the picture is loaded, the img element is assigned a value. The second scheme is implemented by using proxy mode. MyImage function is only responsible for creating img elements, proxy function ProxyImage is responsible for setting loading pictures for the picture, and when the picture is really loaded, myImage.setSrc method in myImage is called to set the path of the picture. The advantages and disadvantages between them are as follows: