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search_nmdc.go
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search_nmdc.go
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package dctoolkit
import (
"fmt"
"net"
"strings"
)
type nmdcSearchType int
const (
nmdcSearchTypeInvalid nmdcSearchType = 0
nmdcSearchTypeAny nmdcSearchType = 1
nmdcSearchTypeAudio nmdcSearchType = 2
nmdcSearchTypeCompressed nmdcSearchType = 3
nmdcSearchTypeDocument nmdcSearchType = 4
nmdcSearchTypeExe nmdcSearchType = 5
nmdcSearchTypePicture nmdcSearchType = 6
nmdcSearchTypeVideo nmdcSearchType = 7
nmdcSearchTypeDirectory nmdcSearchType = 8
nmdcSearchTypeTTH nmdcSearchType = 9
)
func nmdcSearchEscape(in string) string {
return strings.Replace(in, " ", "$", -1)
}
func nmdcSearchUnescape(in string) string {
return strings.Replace(in, "$", " ", -1)
}
func (c *Client) handleNmdcSearchResult(isActive bool, peer *Peer, msg *msgNmdcSearchResult) {
sr := &SearchResult{
IsActive: isActive,
Peer: peer,
Path: msg.Path,
SlotAvail: msg.SlotAvail,
Size: msg.Size,
TTH: msg.TTH,
IsDir: msg.IsDir,
}
c.handleSearchResult(sr)
}
func (c *Client) handleNmdcSearchOutgoingRequest(conf SearchConf) error {
if conf.MaxSize != 0 && conf.MinSize != 0 {
return fmt.Errorf("max size and min size cannot be used together in NMDC")
}
c.connHub.conn.Write(&msgNmdcSearchRequest{
Type: func() nmdcSearchType {
switch conf.Type {
case SearchAny:
return nmdcSearchTypeAny
case SearchDirectory:
return nmdcSearchTypeDirectory
}
return nmdcSearchTypeTTH
}(),
MaxSize: conf.MaxSize,
MinSize: conf.MinSize,
Query: func() string {
if conf.Type == SearchTTH {
return conf.TTH.String()
}
return conf.Query
}(),
IsActive: !c.conf.IsPassive,
Ip: c.ip,
UdpPort: c.conf.UdpPort,
Nick: c.conf.Nick,
})
return nil
}
func (c *Client) handleNmdcSearchIncomingRequest(req *msgNmdcSearchRequest) {
results, err := func() ([]interface{}, error) {
// we do not support search by type
if _, ok := map[nmdcSearchType]struct{}{
nmdcSearchTypeAny: {},
nmdcSearchTypeDirectory: {},
nmdcSearchTypeTTH: {},
}[req.Type]; !ok {
return nil, fmt.Errorf("unsupported search type: %v", req.Type)
}
sr := &searchIncomingRequest{
isActive: req.IsActive,
stype: func() SearchType {
switch req.Type {
case nmdcSearchTypeAny:
return SearchAny
case nmdcSearchTypeDirectory:
return SearchDirectory
}
return SearchTTH
}(),
minSize: req.MinSize,
maxSize: req.MaxSize,
}
if req.Type == nmdcSearchTypeTTH {
if strings.HasPrefix(req.Query, "TTH:") == false {
return nil, fmt.Errorf("invalid TTH (1): %v", req.Query)
}
var err error
sr.tth, err = TigerHashFromBase32(req.Query[4:])
if err != nil {
return nil, fmt.Errorf("invalid TTH (2): %v", req.Query[4:])
}
} else {
sr.query = req.Query
}
return c.handleSearchIncomingRequest(sr)
}()
if err != nil {
dolog(LevelDebug, "[search] error: %s", err)
return
}
var msgs []*msgNmdcSearchResult
for _, res := range results {
msgs = append(msgs, &msgNmdcSearchResult{
Path: func() string {
if f, ok := res.(*shareFile); ok {
return f.aliasPath
}
return res.(*shareDirectory).aliasPath
}(),
IsDir: func() bool {
_, ok := res.(*shareDirectory)
return ok
}(),
Size: func() uint64 {
if f, ok := res.(*shareFile); ok {
return f.size
}
return 0
}(),
TTH: func() TigerHash {
if f, ok := res.(*shareFile); ok {
return f.tth
}
return TigerHash{}
}(),
Nick: c.conf.Nick,
SlotAvail: c.uploadSlotAvail,
SlotCount: c.conf.UploadMaxParallel,
HubIp: c.hubSolvedIp,
HubPort: c.hubPort,
})
}
// send to peer
if req.IsActive == true {
go func() {
conn, err := net.Dial("udp", fmt.Sprintf("%s:%d", req.Ip, req.UdpPort))
if err != nil {
return
}
defer conn.Close()
for _, msg := range msgs {
conn.Write([]byte(msg.NmdcEncode()))
}
}()
// send to hub
} else {
for _, msg := range msgs {
msg.TargetNick = req.Nick
c.connHub.conn.Write(msg)
}
}
}