modulepackage
0.0.0-20220527083919-cd2f09fb8f62
Repository: https://github.com/prestontao/utils.git
Documentation: pkg.go.dev
# README
utils
# Functions
添加一个定时任务
@tick int64 未来的某个时刻,例如(未来10秒钟后执行)：time.Now().Unix()+int64(10)
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AppCode checks whether a multihash code is part of the App range.
创建一对密钥，私钥已经加密，公钥不需要加密
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构建默克尔树根
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把[]byte转换为string，只要性能，不在乎可读性
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byte转int64.
byte转uint16
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byte转uint64.
byte转uint64.
Cast casts a buffer onto a multihash, and returns an error if it does not work.
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把一个对象转换成map
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检查是否完成工作.
检查目录是否存在，不存在则创建
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检查hash值是否有足够多的前导零
@code string Hash值
@zeroes uint64 前导零个数
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Decode parses multihash bytes into a DecodedMultihash.
解析pem公钥.
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Encode a hash digest along with the specified function code.
EncodeName is like Encode() but providing a string name instead of a numeric code.
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对私钥加密
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把文件全路径切分成子路径
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计算文件的hash值
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格式化id为十进制或十六进制字符串
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FromB58String parses a B58-encoded multihash.
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FromHexString parses a hex-encoded multihash.
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高位补零
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生成私钥和公钥文件到本地
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生成私钥
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获得累加器的值
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获得一个可用的TCP端口
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获得一个可用的UDP端口
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获得域名的hash值
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通过一个域名和用户名得到节点的id@return 10进制字符串.
不联网的情况下，得到本机ip地址
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获取本机能联网的ip地址
@return string 获得的ip地址
@return bool 是否能联网
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获取时间
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获得一个随机数(0 - n]，包含0，不包含n
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随机获取一个域名
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随机获取一个int64类型的随机数
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创建一个等待关机命令服务
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获得一个TCP监听
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初始化ledis数据库.
int64转byte.
Long2IPString 把数值转为ip字符串.
IPString2Long 把ip字符串转为数值.
是全球唯一ip
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将加密秘钥填补成16字节长度
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加载本地私钥
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加载本地公钥
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递归创建目录
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间隔n秒后发送一个信号
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New creates a new Cache.
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-----BEGIN EC PRIVATE KEY-----
MIHcAgEBBEIAJuVZ2ujd64R6iA3mJ2Iuaorwc3kUXihcLvF51nuF8MHE82ZobU4k
JBwOjjFX1jjZGDAyiIgXpD9HXtfIWCpIksigBwYFK4EEACOhgYkDgYYABAB7ZnsN
kzgg7JrVxohq2FOxRpA+bUsVsxHKHRur0ezttNRu7ldR36fGgyztoplyUltUndID
7EEi2o9z2E4q99ozOgHwbHnx5WROGYtwvdwDQtvHnCynzO7eixMFZ8pKLddz7YLs
hm8sApO1ZneSDMMBoKhtlX4+pywXZ91WxEfOY/GXlA==
-----END EC PRIVATE KEY-----
将这种格式的[]byte，去掉头和尾后拼接中间的字符
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判断一个路径的文件是否存在
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go tool pprof -http 127.0.0.1:8081 .\mem.prof.
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错误处理
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字符串中随机选择一个
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保存文件
保存文件步骤：
1.创建临时文件
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保存对象为json格式
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对内容生成签名
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s256签名.
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发送停止命令
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uint16转byte
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uint64转byte.
uint64转byte.
ValidCode checks whether a multihash code is valid.
Verify 对密文和明文进行匹配校验.
验证s256签名.
开始工作，猜解一段字符串hash后有足够个0目前（2014年）一般计算机计算出20个0大约一百万次，用时3.0121722秒.
# Constants
constants.
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# Variables
Codes maps a hash code to it's name.
DefaultLengths maps a hash code to it's default length.
errors.
errors.
errors.
errors.
errors.
errors.
errors.
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Names maps the name of a hash to the code.
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# Structs
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Cache is an LRU cache.
DBConn leveldb 连接.
DecodedMultihash represents a parsed multihash and allows easy access to the different parts of a multihash.
ErrInconsistentLen is returned when a decoded multihash has an inconsistent length.
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# Interfaces
A Key may be any value that is comparable.
# Type aliases
Multihash is byte slice with the following form: <hash function code><digest size><hash function output>.
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