117 lines
3.2 KiB
Go
117 lines
3.2 KiB
Go
package server
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import (
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"encoding/base64"
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"encoding/json"
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"io"
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"net/http"
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"path"
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"time"
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"github.com/x-grk/longpolling-remote-access/internal/proto"
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)
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// fsOps maps the URL op segment to a proto task type.
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var fsOps = map[string]string{
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"list": proto.TaskFSList,
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"read": proto.TaskFSRead,
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"write": proto.TaskFSWrite,
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"mkdir": proto.TaskFSMkdir,
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"delete": proto.TaskFSDelete,
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"deltree": proto.TaskFSDelTree,
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"unzip": proto.TaskFSUnzip,
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"zip": proto.TaskFSZip,
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"move": proto.TaskFSMove,
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}
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// fsTaskTimeout bounds how long we wait for an agent to answer a file op.
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const fsTaskTimeout = 60 * time.Second
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func (s *Server) handleFilesPage(w http.ResponseWriter, r *http.Request) {
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id := r.PathValue("id")
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a, err := s.db.GetAgent(id)
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if err != nil || a == nil {
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http.NotFound(w, r)
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return
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}
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s.render(w, "files.html", map[string]any{"Agent": a, "EditLimit": proto.FSReadCap})
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}
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// POST /api/panel/agents/{id}/fs/{op} - run a file-manager operation on the
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// agent and return its result. The request body is the op's JSON args and is
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// forwarded verbatim to the agent.
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func (s *Server) handleFSOp(w http.ResponseWriter, r *http.Request) {
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agentID := r.PathValue("id")
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op := r.PathValue("op")
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taskType, ok := fsOps[op]
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if !ok {
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http.Error(w, "unknown op", http.StatusBadRequest)
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return
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}
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a, err := s.db.GetAgent(agentID)
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if err != nil || a == nil {
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http.NotFound(w, r)
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return
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}
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if !s.online(a) {
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writeJSON(w, proto.TaskResult{Error: "машина офлайн"})
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return
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}
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args, err := io.ReadAll(http.MaxBytesReader(w, r.Body, 64<<20))
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if err != nil {
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http.Error(w, "bad request", http.StatusBadRequest)
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return
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}
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taskID, resultCh := s.hub.CreateTask(agentID, taskType, args)
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defer s.hub.DiscardTask(taskID)
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select {
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case res := <-resultCh:
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writeJSON(w, res)
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case <-time.After(fsTaskTimeout):
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writeJSON(w, proto.TaskResult{Error: "таймаут ожидания агента"})
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}
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}
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// GET /api/panel/agents/{id}/fs/download?path=... - stream a file as a download.
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func (s *Server) handleFSDownload(w http.ResponseWriter, r *http.Request) {
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agentID := r.PathValue("id")
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p := r.URL.Query().Get("path")
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a, err := s.db.GetAgent(agentID)
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if err != nil || a == nil {
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http.NotFound(w, r)
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return
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}
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if !s.online(a) {
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http.Error(w, "машина офлайн", http.StatusServiceUnavailable)
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return
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}
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args, _ := json.Marshal(proto.FSPathArgs{Path: p})
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taskID, ch := s.hub.CreateTask(agentID, proto.TaskFSDownload, args)
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defer s.hub.DiscardTask(taskID)
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select {
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case res := <-ch:
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if !res.OK {
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http.Error(w, res.Error, http.StatusBadGateway)
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return
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}
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var rr proto.FSReadResult
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if err := json.Unmarshal(res.Data, &rr); err != nil {
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http.Error(w, "bad result", http.StatusBadGateway)
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return
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}
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data, _ := base64.StdEncoding.DecodeString(rr.Content)
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name := path.Base(p)
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w.Header().Set("Content-Type", "application/octet-stream")
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w.Header().Set("Content-Disposition", "attachment; filename=\""+name+"\"")
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if rr.Truncated {
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w.Header().Set("X-Truncated", "1")
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}
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_, _ = w.Write(data)
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case <-time.After(fsTaskTimeout):
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http.Error(w, "таймаут ожидания агента", http.StatusGatewayTimeout)
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}
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}
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