603 lines
20 KiB
Go
603 lines
20 KiB
Go
package localserver
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"github.com/pion/webrtc/v3"
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)
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const (
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ZONE_FS_WEBRTC_OFFER ReqType = "zone_fs_offer"
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ZONE_FS_WEBRTC_ANSWER ReqType = "zone_fs_answer"
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ZONE_FS_WEBRTC_RENNEGOTIATION_OFFER ReqType = "zone_fs_rennegotiation_offer"
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ZONE_FS_WEBRTC_RENNEGOTIATION_ANSWER ReqType = "zone_fs_rennegotiation_answer"
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ZONE_FS_WEBRTC_COUNTER_OFFER ReqType = "zone_fs_webrtc_counter_offer"
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ZONE_FS_WEBRTC_CANDIDATE ReqType = "zone_fs_webrtc_candidate"
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)
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type FSInstance struct {
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ZoneID string `json:"id"`
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Owner string `json:"owner"`
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Members []string `json:"members"`
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OpenFiles map[string]*os.File `json:"-"`
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OpenFilesForUser map[string][]string `json:"-"`
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// localSD map[string]*webrtc.SessionDescription `json:"-"`
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// rtcPeerConnections map[string]*ZoneRTCPeerConnection `json:"-"`
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// zoneFSDataChannels map[string]map[string]*DataChannel `json:"-"`
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// pendingCandidates map[string][]*webrtc.ICECandidate `json:"-"`
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// middlewares []interface{} `json:"-"`
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// candidateFlag *uint32 `json:"-"`
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filesFlag *uint32 `json:"-"`
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// rtcPeerConnectionMapFlag *uint32 `json:"-"`
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// dataChannelMapFlag *uint32 `json:"-"`
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// localSDMapFlag *uint32 `json:"-"`
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}
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type FSInstanceOnICECandidateFunc = func(string, string, *webrtc.ICECandidate) error
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func NewFSInstance(id, owner string, members []string) (audioChannel *FSInstance) {
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// candidateFlag := uint32(0)
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// rtcPeerConnectionMapFlag := uint32(0)
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// dataChannelMapFlag := uint32(0)
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filesFlag := uint32(0)
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// localSDMapFlag := uint32(0)
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audioChannel = &FSInstance{
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ZoneID: id,
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Owner: owner,
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Members: members,
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OpenFiles: make(map[string]*os.File),
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OpenFilesForUser: make(map[string][]string),
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// localSD: make(map[string]*webrtc.SessionDescription),
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// rtcPeerConnections: make(map[string]*ZoneRTCPeerConnection),
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// zoneFSDataChannels: make(map[string]map[string]*DataChannel),
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// pendingCandidates: make(map[string][]*webrtc.ICECandidate),
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// middlewares: make([]interface{}, 0),
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// candidateFlag: &candidateFlag,
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filesFlag: &filesFlag,
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// rtcPeerConnectionMapFlag: &rtcPeerConnectionMapFlag,
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// dataChannelMapFlag: &dataChannelMapFlag,
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// localSDMapFlag: &localSDMapFlag,
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}
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return
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}
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func (fs *FSInstance) SetupFileUpload(path, filename, userId string, dc *webrtc.DataChannel) (writePipe chan []byte, err error) {
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concretePath := filepath.Join(dataPath, "data", "zones", fs.ZoneID, "fs", path, "__files__", filename)
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if _, rErr := os.ReadDir(filepath.Join(dataPath, "data", "zones", fs.ZoneID, "fs", path, "__files__")); os.IsNotExist(rErr) {
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if err = os.MkdirAll(filepath.Join(dataPath, "data", "zones", fs.ZoneID, "fs", path, "__files__"), 0700); err != nil {
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return
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}
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} else if rErr != nil {
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return nil, rErr
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}
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if err = os.Remove(concretePath); err != nil {
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logger.Println(err)
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}
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file, err := os.OpenFile(concretePath, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0755)
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if err != nil {
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return
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}
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// _ = atomicallyExecute(fs.filesFlag, func() (err error) {
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// fs.OpenFiles[fmt.Sprintf("%s/%s", filename, userId)] = file
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// if _, ok := fs.OpenFilesForUser[userId]; !ok {
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// fs.OpenFilesForUser[userId] = []string{}
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// }
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// fs.OpenFilesForUser[userId] = append(fs.OpenFilesForUser[userId], fmt.Sprintf("%s/%s", filename, userId))
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// return
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// })
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writePipe = make(chan []byte)
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go func(f *os.File) {
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defer func() {
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_ = f.Close()
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// _ = atomicallyExecute(fs.filesFlag, func() (err error) {
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// if f, ok := fs.OpenFiles[fmt.Sprintf("%s/%s", filename, userId)]; ok {
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// err = f.Close()
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// }
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// delete(fs.OpenFiles, fmt.Sprintf("%s/%s", filename, userId))
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// if _, ok := fs.OpenFilesForUser[userId]; ok {
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// var index int
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// for i, v := range fs.OpenFilesForUser[userId] {
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// if v == fmt.Sprintf("%s/%s", filename, userId) {
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// index = i
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// break
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// }
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// }
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// if len(fs.OpenFilesForUser[userId]) > 1 {
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// fs.OpenFilesForUser[userId] = append(fs.OpenFilesForUser[userId][:index], fs.OpenFilesForUser[userId][:index+1]...)
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// } else {
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// delete(fs.OpenFilesForUser, userId)
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// }
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// }
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// return
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// })
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}()
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for chunk := range writePipe {
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if _, err = file.Write(chunk); err != nil {
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return
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}
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}
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}(file)
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return
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}
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// func (fs *FSInstance) FileUploadDone(path, filename, userId string) (err error) {
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// err = atomicallyExecute(fs.dataChannelMapFlag, func() (err error) {
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// if _, ok := fs.zoneFSDataChannels[userId]; ok {
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// if dc, ok := fs.zoneFSDataChannels[userId][filename]; ok {
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// err = dc.DataChannel.Close()
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// return
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// }
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// }
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// return
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// })
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// return
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// }
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func (fs *FSInstance) FileUploadFailed(path, filename, userId string) (err error) {
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concretePath := filepath.Join(dataPath, "data", "zones", fs.ZoneID, "fs", path, "__files__", filename)
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err = os.Remove(concretePath)
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return
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}
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func (fs *FSInstance) SetupFileDownload(path, filename, userId string, dc *webrtc.DataChannel) (err error) {
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concretePath := filepath.Join(dataPath, "data", "zones", fs.ZoneID, "fs", path, "__files__", filename)
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file, err := os.OpenFile(concretePath, os.O_RDONLY, 0755)
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if err != nil {
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return
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}
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// _ = atomicallyExecute(fs.filesFlag, func() (err error) {
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// fs.OpenFiles[fmt.Sprintf("%s/%s", filename, userId)] = file
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// if _, ok := fs.OpenFilesForUser[userId]; !ok {
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// fs.OpenFilesForUser[userId] = []string{}
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// }
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// fs.OpenFilesForUser[userId] = append(fs.OpenFilesForUser[userId], fmt.Sprintf("%s/%s", filename, userId))
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// return
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// })
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if dc != nil {
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dc.SetBufferedAmountLowThreshold(12000000)
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bufferedAmountLock := make(chan struct{})
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go func(f *os.File) {
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defer func() {
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close(bufferedAmountLock)
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bufferedAmountLock = nil
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_ = f.Close()
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// _ = atomicallyExecute(fs.filesFlag, func() (err error) {
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// if f, ok := fs.OpenFiles[fmt.Sprintf("%s/%s", filename, userId)]; ok {
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// err = f.Close()
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// }
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// delete(fs.OpenFiles, fmt.Sprintf("%s/%s", filename, userId))
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// if _, ok := fs.OpenFilesForUser[userId]; ok {
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// var index int
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// for i, v := range fs.OpenFilesForUser[userId] {
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// if v == fmt.Sprintf("%s/%s", filename, userId) {
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// index = i
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// break
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// }
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// }
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// if len(fs.OpenFilesForUser[userId]) > 1 {
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// fs.OpenFilesForUser[userId] = append(fs.OpenFilesForUser[userId][:index], fs.OpenFilesForUser[userId][:index+1]...)
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// } else {
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// delete(fs.OpenFilesForUser, userId)
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// }
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// }
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// return
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// })
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}()
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r := bufio.NewReader(file)
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buf := make([]byte, 0, 50000)
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sendingLoop:
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for {
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n, readErr := r.Read(buf[:cap(buf)])
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buf = buf[:n]
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if n == 0 {
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if err == nil {
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logger.Println("n is 0 weird")
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break sendingLoop
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}
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if err == io.EOF {
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break sendingLoop
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}
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logger.Println(readErr)
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return
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}
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if err = dc.Send(buf); err != nil {
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dc.Close()
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logger.Println(err)
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break sendingLoop
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}
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if dc.BufferedAmount() > dc.
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BufferedAmountLowThreshold() {
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<-bufferedAmountLock
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}
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}
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logger.Println("done")
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if err = dc.SendText("download_done"); err != nil {
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logger.Println(err)
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}
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}(file)
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dc.OnBufferedAmountLow(func() {
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if bufferedAmountLock != nil {
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bufferedAmountLock <- struct{}{}
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}
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})
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} else {
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err = fmt.Errorf("datachannel not created")
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_ = atomicallyExecute(fs.filesFlag, func() (err error) {
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if file, ok := fs.OpenFiles[fmt.Sprintf("%s/%s", filename, userId)]; ok {
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file.Close()
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}
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delete(fs.OpenFiles, fmt.Sprintf("%s/%s", filename, userId))
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return
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})
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}
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return
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}
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func (fs *FSInstance) FileDownloadFailed(path, filename, userId string) (err error) {
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err = atomicallyExecute(fs.filesFlag, func() (err error) {
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if f, ok := fs.OpenFiles[filename]; ok {
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err = f.Close()
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}
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delete(fs.OpenFiles, filename)
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if _, ok := fs.OpenFilesForUser[userId]; ok {
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var index int
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for i, v := range fs.OpenFilesForUser[userId] {
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if v == fmt.Sprintf("%s/%s", filename, userId) {
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index = i
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break
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}
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}
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if len(fs.OpenFilesForUser[userId]) > 1 {
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fs.OpenFilesForUser[userId] = append(fs.OpenFilesForUser[userId][:index], fs.OpenFilesForUser[userId][:index+1]...)
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} else {
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delete(fs.OpenFilesForUser, userId)
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}
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}
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return
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})
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return
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}
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// func (fs *FSInstance) HandleOffer(ctx context.Context, channelId, userId, sdp, hostId string, sendDCMessage SendDCMessageFunc, cb FSInstanceOnICECandidateFunc) (done chan struct{}, errCh chan error) {
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// done, errCh = make(chan struct{}), make(chan error)
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// go func() {
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// peerConnection, err := fs.createPeerConnection(userId, fs.ZoneID, webrtc.SDPTypeAnswer, cb, sendDCMessage)
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// if err != nil {
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// errCh <- err
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// return
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// }
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// _ = atomicallyExecute(fs.rtcPeerConnectionMapFlag, func() (err error) {
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// fs.rtcPeerConnections[userId] = &ZoneRTCPeerConnection{
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// PeerConnection: peerConnection,
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// makingOffer: false,
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// makingOfferLock: &sync.Mutex{},
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// }
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// return
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// })
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// offer := webrtc.SessionDescription{
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// Type: webrtc.SDPTypeOffer,
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// SDP: sdp,
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// }
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// if err = peerConnection.SetRemoteDescription(offer); err != nil {
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// errCh <- err
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// return
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// }
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// rawAnswer, err := peerConnection.CreateAnswer(nil)
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// if err != nil {
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// errCh <- err
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// return
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// }
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// if err = peerConnection.SetLocalDescription(rawAnswer); err != nil {
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// errCh <- err
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// return
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// }
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// _, _ = sendDCMessage(string(ZONE_FS_WEBRTC_ANSWER), hostId, userId, map[string]interface{}{
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// "to": userId,
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// "from": fs.ZoneID,
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// "channelId": channelId,
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// "sdp": rawAnswer.SDP,
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// })
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// done <- struct{}{}
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// logger.Println("handle offer done")
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// }()
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// return
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// }
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// func (fs *FSInstance) HandleCounterOffer(ctx context.Context, userId string, sendDCMessage SendDCMessageFunc) (err error) {
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// // if err = atomicallyExecute(fs.rtcPeerConnectionMapFlag, func() (err error) {
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// // if _, ok := fs.rtcPeerConnections[userId]; !ok {
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// // err = fmt.Errorf("no field corresponding peer connection for id %s", userId)
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// // return
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// // }
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// // logger.Println("handling counter offer")
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// // connection := fs.rtcPeerConnections[userId]
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// // err = atomicallyExecute(fs.localSDMapFlag, func() (err error) {
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// // err = connection.SetLocalDescription(*fs.localSD[userId])
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// // return
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// // })
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// // return
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// // }); err != nil {
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// // return
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// // }
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// // _ = atomicallyExecute(fs.localSDMapFlag, func() (err error) {
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// // delete(fs.localSD, userId)
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// // return
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// // })
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// if err = atomicallyExecute(fs.candidateFlag, func() (err error) {
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// for _, candidate := range fs.pendingCandidates[userId] {
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// logger.Println("sending candidate to", userId, candidate)
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// d, e := sendDCMessage(string(ZONE_FS_WEBRTC_CANDIDATE), "", userId, map[string]interface{}{
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// "from": fs.ZoneID,
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// "to": userId,
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// "candidate": candidate.ToJSON().Candidate,
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// "sdpMid": *candidate.ToJSON().SDPMid,
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// "sdpMLineIndex": strconv.Itoa(int(*candidate.ToJSON().SDPMLineIndex)),
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// })
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// select {
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// case <-d:
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// case err = <-e:
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// return
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// }
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// }
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// delete(fs.pendingCandidates, userId)
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// return
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// }); err != nil {
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// return
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// }
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// return
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// }
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// func (fs *FSInstance) HandleRennegotiationOffer(from, sdp string, sendDCMessage SendDCMessageFunc) (err error) {
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// err = atomicallyExecute(fs.rtcPeerConnectionMapFlag, func() (err error) {
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// if _, ok := fs.rtcPeerConnections[from]; !ok {
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// err = fmt.Errorf("no corresponding peer connection for id %s", from)
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// return
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// }
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// // fs.rtcPeerConnections[from].makingOfferLock.Lock()
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// // if fs.rtcPeerConnections[from].makingOffer {
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// // fs.rtcPeerConnections[from].makingOfferLock.Unlock()
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// // return fmt.Errorf("already making an offer or state is stable")
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// // }
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// // fs.rtcPeerConnections[from].makingOfferLock.Unlock()
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// if err = fs.rtcPeerConnections[from].SetRemoteDescription(webrtc.SessionDescription{SDP: sdp, Type: webrtc.SDPTypeOffer}); err != nil {
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// return
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// }
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// localSd, err := fs.rtcPeerConnections[from].CreateAnswer(nil)
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// if err != nil {
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// return
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// }
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// if err = fs.rtcPeerConnections[from].SetLocalDescription(localSd); err != nil {
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// return
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// }
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// d, e := sendDCMessage(string(ZONE_FS_WEBRTC_RENNEGOTIATION_ANSWER), fs.ZoneID, from, map[string]interface{}{
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// "from": fs.ZoneID,
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// "to": from,
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// "sdp": localSd.SDP,
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// })
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// select {
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// case <-d:
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// case err = <-e:
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// }
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// return
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// })
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// return
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// }
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// func (fs *FSInstance) HandleRennegotiationAnswer(from, sdp string) (err error) {
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// logger.Println("---------------------handling rennego answer")
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// err = atomicallyExecute(fs.rtcPeerConnectionMapFlag, func() (err error) {
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// err = fs.rtcPeerConnections[from].SetRemoteDescription(webrtc.SessionDescription{SDP: sdp, Type: webrtc.SDPTypeAnswer})
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// return
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// })
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// return
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// }
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// func (fs *FSInstance) AddCandidate(candidate *webrtc.ICECandidateInit, from string) (err error) {
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// logger.Println("adding ice candidate", candidate)
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// err = atomicallyExecute(fs.rtcPeerConnectionMapFlag, func() (err error) {
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// if _, ok := fs.rtcPeerConnections[from]; ok && candidate != nil {
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// err = fs.rtcPeerConnections[from].AddICECandidate(*candidate)
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// }
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// return
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// })
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// return
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// }
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// func (fs *FSInstance) createPeerConnection(target, from string, peerType webrtc.SDPType, cb FSInstanceOnICECandidateFunc, sendDCMessage SendDCMessageFunc) (peerConnection *webrtc.PeerConnection, err error) {
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// defer func() {
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// if r := recover(); err != nil {
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// logger.Printf("recover from panic : %v\n", r)
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// }
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// }()
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// config := webrtc.Configuration{
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// ICEServers: []webrtc.ICEServer{
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// {
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// URLs: []string{"stun:stun.l.google.com:19302", "stun:stunserver.org:3478"},
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// },
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// },
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// SDPSemantics: webrtc.SDPSemanticsUnifiedPlanWithFallback,
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// }
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// peerConnection, err = webrtc.NewPeerConnection(config)
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// if err != nil {
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// return
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// }
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// logger.Println("---------------------------------------------------")
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// if peerType == webrtc.SDPTypeAnswer {
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// maxRetransmits := uint16(100)
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// channel, err := peerConnection.CreateDataChannel("data", &webrtc.DataChannelInit{
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// MaxRetransmits: &maxRetransmits,
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// })
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// if err != nil {
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// return nil, err
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// }
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// channel.OnOpen(func() {
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// logger.Println("channel opened")
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// if chanErr := channel.SendText("yooo man this is open"); chanErr != nil {
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// logger.Println(chanErr)
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// }
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// })
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// channel.OnMessage(func(msg webrtc.DataChannelMessage) {
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// var event CallEvent
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// if err := json.Unmarshal(msg.Data, &event); err != nil {
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// logger.Println(err)
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// return
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// }
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// if e := fs.HandleDataChannelEvents(event.From, event.EventId, event.Payload); e != nil {
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// logger.Println("*-------------- datachannel error: ", e)
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// }
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// })
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// logger.Println("new channel for target : ", target)
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// channel.SetBufferedAmountLowThreshold(bufferedAmountLowThreshold)
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// channel.OnBufferedAmountLow(func() {
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|
// })
|
|
// _ = atomicallyExecute(fs.dataChannelMapFlag, func() (err error) {
|
|
// logger.Println(target)
|
|
// l := uint32(0)
|
|
// if _, ok := fs.zoneFSDataChannels[target]; !ok {
|
|
// fs.zoneFSDataChannels[target] = make(map[string]*DataChannel)
|
|
// }
|
|
// fs.zoneFSDataChannels[target][channel.Label()] = &DataChannel{
|
|
// DataChannel: channel,
|
|
// l: &l,
|
|
// }
|
|
// return
|
|
// })
|
|
// } else {
|
|
// peerConnection.OnDataChannel(func(dc *webrtc.DataChannel) {
|
|
// _ = atomicallyExecute(fs.dataChannelMapFlag, func() (err error) {
|
|
// l := uint32(0)
|
|
// if _, ok := fs.zoneFSDataChannels[target]; !ok {
|
|
// fs.zoneFSDataChannels[target] = make(map[string]*DataChannel)
|
|
// }
|
|
// fs.zoneFSDataChannels[target][dc.Label()] = &DataChannel{
|
|
// DataChannel: dc,
|
|
// l: &l,
|
|
// }
|
|
// return
|
|
// })
|
|
// dc.OnOpen(func() {
|
|
// logger.Printf("got a new open datachannel %s\n", dc.Label())
|
|
// })
|
|
// dc.OnMessage(func(msg webrtc.DataChannelMessage) {
|
|
// var event CallEvent
|
|
// if err := json.Unmarshal(msg.Data, &event); err != nil {
|
|
// logger.Println(err)
|
|
// return
|
|
// }
|
|
// if e := fs.HandleDataChannelEvents(event.From, event.EventId, event.Payload); e != nil {
|
|
// logger.Println("*-------------- datachannel error: ", e)
|
|
// }
|
|
// })
|
|
// })
|
|
// }
|
|
// peerConnection.OnConnectionStateChange(func(pcs webrtc.PeerConnectionState) {
|
|
// if pcs == webrtc.PeerConnectionStateClosed || pcs == webrtc.PeerConnectionStateDisconnected || pcs == webrtc.PeerConnectionStateFailed {
|
|
// logger.Println(pcs)
|
|
// //fs.HandleLeavingMember(target)
|
|
// }
|
|
// })
|
|
// peerConnection.OnICEConnectionStateChange(func(is webrtc.ICEConnectionState) {
|
|
// logger.Printf("ICE connection state has changed %s\n", is.String())
|
|
// if is == webrtc.ICEConnectionStateDisconnected || is == webrtc.ICEConnectionStateFailed {
|
|
// logger.Println(is)
|
|
// }
|
|
// })
|
|
// peerConnection.OnICECandidate(func(i *webrtc.ICECandidate) {
|
|
// if i == nil {
|
|
// return
|
|
// }
|
|
// _ = atomicallyExecute(fs.candidateFlag, func() (err error) {
|
|
// desc := peerConnection.RemoteDescription()
|
|
// if desc == nil {
|
|
// logger.Println("generated candidate appended to list : ", i)
|
|
// fs.pendingCandidates[target] = append(fs.pendingCandidates[target], i)
|
|
// } else {
|
|
// logger.Println("generated candidate : ", i)
|
|
// if iceCandidateErr := cb(from, target, i); iceCandidateErr != nil {
|
|
// logger.Println(iceCandidateErr)
|
|
// }
|
|
// }
|
|
// return
|
|
// })
|
|
// })
|
|
// // peerConnection.OnNegotiationNeeded(func() {
|
|
// // logger.Println("---------------- rennego is needed -----------")
|
|
// // _ = atomicallyExecute(fs.rtcPeerConnectionMapFlag, func() (err error) {
|
|
// // logger.Println("----------------- sending renego to peer with id", target)
|
|
// // if peerConnection.SignalingState() == webrtc.SignalingStateStable {
|
|
// // localSd, localSdErr := peerConnection.CreateOffer(nil)
|
|
// // if localSdErr != nil {
|
|
// // logger.Println(localSdErr)
|
|
// // return localSdErr
|
|
// // }
|
|
// // if err = peerConnection.SetLocalDescription(localSd); err != nil {
|
|
// // logger.Println(err)
|
|
// // return
|
|
// // }
|
|
// // d, e := sendDCMessage(string(ZONE_FS_WEBRTC_RENNEGOTIATION_OFFER), fs.ZoneID, target, map[string]interface{}{
|
|
// // "from": fs.ZoneID,
|
|
// // "to": target,
|
|
// // "sdp": localSd.SDP,
|
|
// // })
|
|
// // select {
|
|
// // case <-d:
|
|
// // case err = <-e:
|
|
// // logger.Println(err)
|
|
// // }
|
|
// // }
|
|
// // return
|
|
// // })
|
|
// // })
|
|
// return
|
|
// }
|
|
|
|
// func (fs *FSInstance) HandleLeavingMember(id string) {
|
|
// _ = atomicallyExecute(fs.dataChannelMapFlag, func() (err error) {
|
|
// if _, ok := fs.zoneFSDataChannels[id]; ok {
|
|
// for _, dc := range fs.zoneFSDataChannels[id] {
|
|
// dc.DataChannel.Close()
|
|
// }
|
|
// }
|
|
// delete(fs.zoneFSDataChannels, id)
|
|
// return
|
|
// })
|
|
// logger.Println("chatfs datachannels cleaned")
|
|
// _ = atomicallyExecute(fs.rtcPeerConnectionMapFlag, func() (err error) {
|
|
// if pc, ok := fs.rtcPeerConnections[id]; ok {
|
|
// if closeErr := pc.Close(); closeErr != nil {
|
|
// err = closeErr
|
|
// logger.Println("peer connection close error", closeErr)
|
|
// }
|
|
// }
|
|
// delete(fs.rtcPeerConnections, id)
|
|
// return
|
|
// })
|
|
// logger.Println("chats perrconnections cleaned")
|
|
// _ = atomicallyExecute(fs.candidateFlag, func() (err error) {
|
|
// delete(fs.pendingCandidates, id)
|
|
// return
|
|
// })
|
|
// _ = atomicallyExecute(fs.filesFlag, func() (err error) {
|
|
// for _, openFile := range fs.OpenFilesForUser[id] {
|
|
// if f, ok := fs.OpenFiles[openFile]; ok {
|
|
// _ = f.Close()
|
|
// }
|
|
// delete(fs.OpenFiles, openFile)
|
|
// }
|
|
// delete(fs.OpenFilesForUser, id)
|
|
// return
|
|
// })
|
|
// }
|
|
|
|
func (fs *FSInstance) HandleDataChannelEvents(from, eventId string, payload map[string]interface{}) (err error) {
|
|
switch eventId {
|
|
}
|
|
return
|
|
}
|