我正在尝试编写protobuf *timestamp.timestamp到二进制,而我遇到的错误是 invalid type *Timestamp.timestamp
,我试图无济于事,谁能指出我的方向?谢谢!
package main
import (
"bytes"
"encoding/binary"
"fmt"
google_protobuf "github.com/golang/protobuf/ptypes/timestamp"
"time"
)
func main() {
buff := new(bytes.Buffer)
ts := &google_protobuf.Timestamp{
Seconds: time.Now().Unix(),
Nanos: 0,
}
err := binary.Write(buff, binary.LittleEndian, ts)
if err != nil {
panic(err)
}
fmt.Println("done")
}
有人可以将我指向某个方向吗?
阅读错误消息。
binary.Write: invalid type *timestamp.Timestamp
阅读binary.Write
和timestamp.Timestamp
的文档。
包二进制
import "encoding/binary"
func写
func Write(w io.Writer, order ByteOrder, data interface{}) error
写将数据的二进制表示形式写入w。数据必须是 固定尺寸的值或固定尺寸值的切片,或指向此类的指针 数据。布尔值编码为一个字节:1对于true,为false为0。 编写为W的字节使用指定的字节顺序编码并读取 从数据的连续字段。编写结构时,零值 是为带有空白(_)字段名称的字段编写的。
软件包 时间戳
import "github.com/golang/protobuf/ptypes/timestamp"
类型 时间戳
type Timestamp struct { // Represents seconds of UTC time since Unix epoch // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to // 9999-12-31T23:59:59Z inclusive. Seconds int64 `protobuf:"varint,1,opt,name=seconds,proto3" json:"seconds,omitempty"` // Non-negative fractions of a second at nanosecond resolution. Negative // second values with fractions must still have non-negative nanos values // that count forward in time. Must be from 0 to 999,999,999 // inclusive. Nanos int32 `protobuf:"varint,2,opt,name=nanos,proto3" json:"nanos,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` }
时间戳代表独立于任何时区或 日历,表示为秒和秒的秒。 UTC时期时间的纳秒分辨率。它是使用 延长格里高利日历 向后到第一年。它是编码的,假设所有分钟都是60 秒长,即leap秒被"涂抹" 需要表进行解释。范围从0001-01-01T00:00:00z起 到9999-12-31T23:59:59.99999999999Z。通过限制到该范围,我们 确保我们可以转换为RFC 3339日期字符串。看 https://www.ietf.org/rfc/rfc33399.txt。
正如错误消息所说:*timestamp.Timestamp
不是固定尺寸的值或固定尺寸值的切片,或者是指向此类数据的指针。
要确认这一点,请评论XXX_unrecognized
变量大小的字段;没有错误。
package main
import (
"bytes"
"encoding/binary"
"fmt"
"time"
)
// https://github.com/golang/protobuf/blob/master/ptypes/timestamp/timestamp.pb.go
type Timestamp struct {
// Represents seconds of UTC time since Unix epoch
// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
// 9999-12-31T23:59:59Z inclusive.
Seconds int64 `protobuf:"varint,1,opt,name=seconds,proto3" json:"seconds,omitempty"`
// Non-negative fractions of a second at nanosecond resolution. Negative
// second values with fractions must still have non-negative nanos values
// that count forward in time. Must be from 0 to 999,999,999
// inclusive.
Nanos int32 `protobuf:"varint,2,opt,name=nanos,proto3" json:"nanos,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
// XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func main() {
buff := new(bytes.Buffer)
ts := &Timestamp{
Seconds: time.Now().Unix(),
Nanos: 0,
}
err := binary.Write(buff, binary.LittleEndian, ts)
if err != nil {
panic(err)
}
fmt.Println("done")
}
游乐场:https://play.golang.org/p/q5ngno49dsc
输出:
done