(ctx ModuleContext, sessionID string, taskID uint32, sess *sessions.Session, shellTool, filePath string)
| 75 | } |
| 76 | |
| 77 | func (m *DownloadModule) probeAndDownload(ctx ModuleContext, sessionID string, taskID uint32, sess *sessions.Session, shellTool, filePath string) { |
| 78 | // Enqueue file-size probe. |
| 79 | probeCmd := sessions.FileSizeProbeCommand(filePath) |
| 80 | probeArgs := sessions.BuildCommandArguments(sess, shellTool, probeCmd) |
| 81 | if _, ok := enqueueToolAction(ctx, sessionID, taskID, shellTool, probeArgs); !ok { |
| 82 | return |
| 83 | } |
| 84 | |
| 85 | // Wait for probe result via TaskManager fan-out. |
| 86 | ch := ctx.Tasks.AwaitResult(sessionID, taskID) |
| 87 | if ch == nil { |
| 88 | ctx.Tasks.Fail(sessionID, taskID, "await failed") |
| 89 | return |
| 90 | } |
| 91 | |
| 92 | var fileSize int |
| 93 | if result, ok := awaitTaskResult(ch, taskID); ok { |
| 94 | var err error |
| 95 | fileSize, err = sessions.ParseFileSizeOutput(result.Output) |
| 96 | if err != nil { |
| 97 | log.Warnf("[bridge] failed to parse file size for %s: %v (output: %q)", filePath, err, result.Output) |
| 98 | fileSize = 0 |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | log.Infof("[bridge] probed file size for %s: %d bytes (session %s)", filePath, fileSize, sessionID) |
| 103 | |
| 104 | plan := sessions.PlanDownload(fileSize, sess.UserAgent) |
| 105 | |
| 106 | if plan.Strategy == sessions.StrategyDirectTool { |
| 107 | readTool := sessions.PickReadTool(sess) |
| 108 | if readTool != "" { |
| 109 | args := sessions.BuildReadArguments(sess, readTool, filePath) |
| 110 | if _, ok := enqueueToolAction(ctx, sessionID, taskID, readTool, args); ok { |
| 111 | log.Infof("[bridge] enqueued direct read after probe for session %s: %s", sessionID, filePath) |
| 112 | m.waitForReadResult(ctx, sessionID, taskID, ch) |
| 113 | return |
| 114 | } |
| 115 | } |
| 116 | // Fall through to shell path. |
| 117 | plan.Strategy = sessions.StrategyShellBase64 |
| 118 | plan.ChunkSize = sessions.MatchAgentProfile(sess.UserAgent).ChunkSizeBytes |
| 119 | if fileSize > 0 { |
| 120 | plan.NumChunks = (fileSize + plan.ChunkSize - 1) / plan.ChunkSize |
| 121 | } else { |
| 122 | plan.NumChunks = 1 |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | // Shell + base64 chunked download. |
| 127 | if fileSize <= 0 { |
| 128 | singleCmd := fmt.Sprintf("base64 '%s'", filePath) |
| 129 | m.executeSingleShell(ctx, sessionID, taskID, shellTool, sess, singleCmd, ch) |
| 130 | return |
| 131 | } |
| 132 | |
| 133 | chunks := sessions.GenerateDownloadChunks(filePath, plan) |
| 134 | if len(chunks) == 0 { |
no test coverage detected