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message.go
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message.go
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// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
// All rights reserved. Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package protocol
import "fmt"
type IndexMessage struct {
Repository string // max:64
Files []FileInfo
}
type FileInfo struct {
Name string // max:8192
Flags uint32
Modified int64
Version uint64
LocalVersion uint64
Blocks []BlockInfo
}
func (f FileInfo) String() string {
return fmt.Sprintf("File{Name:%q, Flags:0%o, Modified:%d, Version:%d, Size:%d, Blocks:%v}",
f.Name, f.Flags, f.Modified, f.Version, f.Size(), f.Blocks)
}
func (f FileInfo) Size() (bytes int64) {
if IsDeleted(f.Flags) || IsDirectory(f.Flags) {
return 128
}
for _, b := range f.Blocks {
bytes += int64(b.Size)
}
return
}
func (f FileInfo) IsDeleted() bool {
return IsDeleted(f.Flags)
}
// Used for unmarshalling a FileInfo structure but skipping the actual block list
type FileInfoTruncated struct {
Name string // max:8192
Flags uint32
Modified int64
Version uint64
LocalVersion uint64
NumBlocks uint32
}
// Returns a statistical guess on the size, not the exact figure
func (f FileInfoTruncated) Size() int64 {
if IsDeleted(f.Flags) || IsDirectory(f.Flags) {
return 128
}
if f.NumBlocks < 2 {
return BlockSize / 2
} else {
return int64(f.NumBlocks-1)*BlockSize + BlockSize/2
}
}
func (f FileInfoTruncated) IsDeleted() bool {
return IsDeleted(f.Flags)
}
type FileIntf interface {
Size() int64
IsDeleted() bool
}
type BlockInfo struct {
Offset int64 // noencode (cache only)
Size uint32
Hash []byte // max:64
}
func (b BlockInfo) String() string {
return fmt.Sprintf("Block{%d/%d/%x}", b.Offset, b.Size, b.Hash)
}
type RequestMessage struct {
Repository string // max:64
Name string // max:8192
Offset uint64
Size uint32
}
type ResponseMessage struct {
Data []byte
}
type ClusterConfigMessage struct {
ClientName string // max:64
ClientVersion string // max:64
Repositories []Repository // max:64
Options []Option // max:64
}
func (o *ClusterConfigMessage) GetOption(key string) string {
for _, option := range o.Options {
if option.Key == key {
return option.Value
}
}
return ""
}
type Repository struct {
ID string // max:64
Nodes []Node // max:64
}
type Node struct {
ID []byte // max:32
Flags uint32
MaxLocalVersion uint64
}
type Option struct {
Key string // max:64
Value string // max:1024
}
type CloseMessage struct {
Reason string // max:1024
}
type EmptyMessage struct{}