app.post('/upload', function(req, res){
//接收前台POST过来的 64
var imgData = req.body.imgData;
//过滤data:URL
var 64Data = imgData.replace(/^data:image/w+; 64,/, "");
var dataBuffer = new Buffer( 64Data, ' 64');
fs.writeFile("image.png", dataBuffer, function(err) {
if(err){
res.send(err);
}else{
res.send("保存成功!");
}
});
});

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