我正在hyperledger fabric(node.js SDK)上构建一个区块链。
https:/hyperledger.github.iofabric-sdk-noderelease-1.4global.html#BlockchainInfo__anchor。
我叫api 区块链信息 并获得 json 格式响应,其中包括 当前的BlockHash
正式文件显示,该答复 数据类型 的 当前的BlockHash 是 Array< byte>
如下面的数据,我想把这个缓冲区转换成字符串,但是不知道该怎么做。
我想把这个缓冲区转换成字符串,但是不知道该怎么做。
谢谢你阅读这个问题。
{ buffer:
{ type: 'Buffer',
data:
[ 8,
207,
230,
17,
18,
32,
124,
143,
73,
40,
171,
42,
251,
237,
193,
138,
36,
92,
58,
57,
254,
56,
144,
96,
54,
201,
242,
64,
10,
111,
150,
28,
198,
187,
196,
118,
97,
160,
26,
32,
16,
160,
154,
19,
11,
179,
147,
11,
38,
16,
150,
190,
126,
17,
121,
123,
200,
7,
71,
27,
241,
103,
54,
188,
196,
248,
178,
88,
48,
115,
186,
133 ] },
offset: 6,
markedOffset: -1,
limit: 38,
littleEndian: true,
noAssert: false }
以下是原点响应数据
{"height":{"low":291663,"high":0,"unsigned":true},"currentBlockHash":{"buffer":{"type":"Buffer","data":[8,207,230,17,18,32,124,143,73,40,171,42,251,237,193,138,36,92,58,57,254,56,144,96,54,201,242,64,10,111,150,28,198,187,196,118,97,160,26,32,16,160,154,19,11,179,147,11,38,16,150,190,126,17,121,123,200,7,71,27,241,103,54,188,196,248,178,88,48,115,186,133]},"offset":6,"markedOffset":-1,"limit":38,"littleEndian":true,"noAssert":false},"previousBlockHash":{"buffer":{"type":"Buffer","data":[8,207,230,17,18,32,124,143,73,40,171,42,251,237,193,138,36,92,58,57,254,56,144,96,54,201,242,64,10,111,150,28,198,187,196,118,97,160,26,32,16,160,154,19,11,179,147,11,38,16,150,190,126,17,121,123,200,7,71,27,241,103,54,188,196,248,178,88,48,115,186,133]},"offset":40,"markedOffset":-1,"limit":72,"littleEndian":true,"noAssert":false}}
我认为JSDoc在这种情况下是误导性的。我认为在这个案例中,JSDoc有误导性。currentBlockHash
实际上将是一个Node.js Buffer(或者可能是一个模拟Buffer行为的protobuf实现)。你可以通过调用 currentBlockHash.toString()
.
我观察到一些情况,在protobuf Buffer实现中调用toString()会给出一个调试字符串,而不是缓冲区内容的字符串表示,所以为了安全起见,我倾向于指定一个编码参数。
在哈希的情况下,把它看成一个十六进制字符串可能比utf8(默认值)更方便,所以我会尝试使用 currentBlockHash.toString('hex')
请看这里了解更多关于缓冲区的信息。https:/nodejs.orgdocslatest-v10.xapibuffer.html。