buffer 与 string转换

生成一个buffer

var buffer = new Buffer("buffer converts to string")
//打印结果 <Buffer 62 75 66 66 65 72 20 63 6f 6e 76 65 72 74 73 20 74 6f 20 73 74 72 69 6e 67>

转成json

buffer.toJSON()
//打印结果 { type: 'Buffer',data:[98,117,102,102,101,114,32,99,111,110,118,101,114,116,115,32,116,111,32,115,116,114,105,110,103]}

转回buffer

new Buffer([98,117,102,102,101,114,32,99,111,110,118,101,114,116,115,32,116,111,32,115,116,114,105,110,103])
//打印结果 <Buffer 62 75 66 66 65 72 20 63 6f 6e 76 65 72 74 73 20 74 6f 20 73 74 72 69 6e 67>