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refactor: 重构前端

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This commit is contained in:
Baobhan Sith
2025-04-15 11:11:01 +08:00
parent d1f874d38b
commit 2072bff331
16 changed files with 2361 additions and 768 deletions
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packages/backend/src/services/sftp.service.ts
+223 -1
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@@ -1,4 +1,4 @@
import { Client, SFTPWrapper, Stats } from 'ssh2';
import { Client, SFTPWrapper, Stats, WriteStream } from 'ssh2'; // Import WriteStream
import { WebSocket } from 'ws';
import { ClientState } from '../websocket'; // 导入统一的 ClientState
@@ -37,11 +37,22 @@ interface NetworkStats {
const DEFAULT_POLLING_INTERVAL = 1000;
const previousNetStats = new Map<string, { rx: number, tx: number, timestamp: number }>();
// Interface for tracking active uploads
interface ActiveUpload {
remotePath: string;
totalSize: number;
bytesWritten: number;
stream: WriteStream;
sessionId: string; // Link back to the session for cleanup
}
export class SftpService {
private clientStates: Map<string, ClientState>; // 使用导入的 ClientState
private activeUploads: Map<string, ActiveUpload>; // Map<uploadId, ActiveUpload>
constructor(clientStates: Map<string, ClientState>) {
this.clientStates = clientStates;
this.activeUploads = new Map(); // Initialize the map
}
/**
@@ -98,6 +109,13 @@ export class SftpService {
state.sftp.end();
state.sftp = undefined;
}
// Also clean up any active uploads associated with this session
this.activeUploads.forEach((upload, uploadId) => {
if (upload.sessionId === sessionId) {
console.warn(`[SFTP] Cleaning up active upload ${uploadId} for session ${sessionId} due to SFTP session cleanup.`);
this.cancelUploadInternal(uploadId, 'SFTP session ended'); // Internal cancel without sending message
}
});
}
// --- SFTP 操作方法 ---
@@ -368,4 +386,208 @@ export class SftpService {
// async uploadFile(...)
// async downloadFile(...)
/** 获取路径的绝对表示 */
async realpath(sessionId: string, path: string, requestId: string): Promise<void> {
const state = this.clientStates.get(sessionId);
if (!state || !state.sftp) {
console.warn(`[SFTP] SFTP 未准备好，无法在 ${sessionId} 上执行 realpath (ID: ${requestId})`);
state?.ws.send(JSON.stringify({ type: 'sftp:realpath:error', path: path, payload: 'SFTP 会话未就绪', requestId: requestId }));
return;
}
console.debug(`[SFTP ${sessionId}] Received realpath request for ${path} (ID: ${requestId})`);
try {
state.sftp.realpath(path, (err, absPath) => {
if (err) {
console.error(`[SFTP ${sessionId}] realpath ${path} failed (ID: ${requestId}):`, err);
state.ws.send(JSON.stringify({ type: 'sftp:realpath:error', path: path, payload: `获取绝对路径失败: ${err.message}`, requestId: requestId }));
} else {
console.log(`[SFTP ${sessionId}] realpath ${path} -> ${absPath} success (ID: ${requestId})`);
// 在 payload 中同时发送请求的路径和绝对路径
state.ws.send(JSON.stringify({ type: 'sftp:realpath:success', path: path, payload: { requestedPath: path, absolutePath: absPath }, requestId: requestId }));
}
});
} catch (error: any) {
console.error(`[SFTP ${sessionId}] realpath ${path} caught unexpected error (ID: ${requestId}):`, error);
state.ws.send(JSON.stringify({ type: 'sftp:realpath:error', path: path, payload: `获取绝对路径时发生意外错误: ${error.message}`, requestId: requestId }));
}
}
// --- File Upload Methods ---
/** Start a new file upload */
startUpload(sessionId: string, uploadId: string, remotePath: string, totalSize: number): void {
const state = this.clientStates.get(sessionId);
if (!state || !state.sftp) {
console.warn(`[SFTP Upload ${uploadId}] SFTP not ready for session ${sessionId}.`);
state?.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: 'SFTP 会话未就绪' } }));
return;
}
if (this.activeUploads.has(uploadId)) {
console.warn(`[SFTP Upload ${uploadId}] Upload already in progress for session ${sessionId}.`);
state.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: 'Upload already started' } }));
return;
}
console.log(`[SFTP Upload ${uploadId}] Starting upload for ${remotePath} (${totalSize} bytes) in session ${sessionId}`);
try {
const stream = state.sftp.createWriteStream(remotePath);
const uploadState: ActiveUpload = {
remotePath,
totalSize,
bytesWritten: 0,
stream,
sessionId,
};
this.activeUploads.set(uploadId, uploadState);
stream.on('error', (err: Error) => {
console.error(`[SFTP Upload ${uploadId}] Write stream error for ${remotePath}:`, err);
state.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: `写入流错误: ${err.message}` } }));
this.activeUploads.delete(uploadId); // Clean up state on error
});
stream.on('close', () => {
// This 'close' event now primarily handles cleanup after the stream is fully closed.
// The success message is sent earlier in handleUploadChunk.
const finalState = this.activeUploads.get(uploadId);
if (finalState) {
// Check if bytes written match total size upon close, log warning if not (could indicate cancellation after success msg sent)
if (finalState.bytesWritten !== finalState.totalSize) {
console.warn(`[SFTP Upload ${uploadId}] Write stream closed for ${remotePath}, but written bytes (${finalState.bytesWritten}) != total size (${finalState.totalSize}). This might happen if cancelled after success message was sent.`);
// Optionally send an error if this state is unexpected, but success might have already been sent.
// state.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: '文件大小不匹配或上传未完成' } }));
} else {
console.log(`[SFTP Upload ${uploadId}] Write stream closed successfully for ${remotePath}. State cleaned up.`);
}
this.activeUploads.delete(uploadId); // Clean up state when stream is closed
} else {
console.log(`[SFTP Upload ${uploadId}] Write stream closed for ${remotePath}, but upload state was already removed.`);
}
});
stream.on('finish', () => {
// The 'finish' event fires when stream.end() is called and all data has been flushed to the underlying system.
// This might be a slightly earlier point than 'close'. Let's log it.
console.log(`[SFTP Upload ${uploadId}] Write stream finished for ${remotePath}. Waiting for close.`);
});
// Notify client that we are ready for chunks
state.ws.send(JSON.stringify({ type: 'sftp:upload:ready', payload: { uploadId } }));
} catch (error: any) {
console.error(`[SFTP Upload ${uploadId}] Error starting upload for ${remotePath}:`, error);
state.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: `开始上传时出错: ${error.message}` } }));
this.activeUploads.delete(uploadId); // Clean up if start failed
}
}
/** Handle an incoming file chunk */
handleUploadChunk(sessionId: string, uploadId: string, chunkIndex: number, dataBase64: string): void {
const state = this.clientStates.get(sessionId);
const uploadState = this.activeUploads.get(uploadId);
if (!state || !state.sftp) {
// Session or SFTP gone, can't process chunk. Upload might be cleaned up elsewhere.
console.warn(`[SFTP Upload ${uploadId}] Received chunk ${chunkIndex}, but session ${sessionId} or SFTP is invalid.`);
this.cancelUploadInternal(uploadId, 'Session or SFTP invalid');
return;
}
if (!uploadState) {
console.warn(`[SFTP Upload ${uploadId}] Received chunk ${chunkIndex}, but no active upload found.`);
// Send error back to client? Might flood if many chunks arrive after cancellation.
// state.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: '无效的上传 ID 或上传已取消/完成' } }));
return;
}
try {
const chunkBuffer = Buffer.from(dataBase64, 'base64');
// console.debug(`[SFTP Upload ${uploadId}] Writing chunk ${chunkIndex} (${chunkBuffer.length} bytes) to ${uploadState.remotePath}`);
// Write the chunk. The 'drain' event is handled automatically by Node.js streams
// if the write buffer is full. We just write.
const writeSuccess = uploadState.stream.write(chunkBuffer, (err) => {
if (err) {
// This callback handles errors specifically related to *this* write operation.
console.error(`[SFTP Upload ${uploadId}] Error writing chunk ${chunkIndex} to ${uploadState.remotePath}:`, err);
state.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: `写入块 ${chunkIndex} 失败: ${err.message}` } }));
// Consider cancelling the upload on write error
this.cancelUploadInternal(uploadId, `Write error on chunk ${chunkIndex}`);
}
// else { console.debug(`[SFTP Upload ${uploadId}] Chunk ${chunkIndex} write callback success.`); }
});
if (!writeSuccess) {
// This indicates the buffer is full and we should wait for 'drain'.
// However, for simplicity in this WebSocket context, we might rely on TCP backpressure
// or simply continue writing, letting the stream buffer handle it.
// Adding explicit 'drain' handling can add complexity.
console.warn(`[SFTP Upload ${uploadId}] Write stream buffer full after chunk ${chunkIndex}. Waiting for drain is recommended for large files/slow connections.`);
}
uploadState.bytesWritten += chunkBuffer.length;
// Send progress (optional, consider throttling)
// const progress = Math.round((uploadState.bytesWritten / uploadState.totalSize) * 100);
// state.ws.send(JSON.stringify({ type: 'sftp:upload:progress', payload: { uploadId, progress } }));
// Check if upload is complete
if (uploadState.bytesWritten > uploadState.totalSize) {
console.error(`[SFTP Upload ${uploadId}] Bytes written (${uploadState.bytesWritten}) exceeded total size (${uploadState.totalSize}) for ${uploadState.remotePath}.`);
state.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: '写入字节数超过文件总大小' } }));
this.cancelUploadInternal(uploadId, 'Bytes written exceeded total size');
} else if (uploadState.bytesWritten === uploadState.totalSize) {
console.log(`[SFTP Upload ${uploadId}] All bytes (${uploadState.bytesWritten}) received for ${uploadState.remotePath}. Sending success and ending stream.`);
// Send success message IMMEDIATELY upon receiving the last expected byte
state.ws.send(JSON.stringify({ type: 'sftp:upload:success', payload: { uploadId, remotePath: uploadState.remotePath } }));
// Now end the stream. The 'close' event will handle cleanup.
uploadState.stream.end();
}
} catch (error: any) {
console.error(`[SFTP Upload ${uploadId}] Error handling chunk ${chunkIndex} for ${uploadState?.remotePath}:`, error);
state.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: `处理块 ${chunkIndex} 时出错: ${error.message}` } }));
this.cancelUploadInternal(uploadId, `Error handling chunk ${chunkIndex}`);
}
}
/** Cancel an ongoing upload */
cancelUpload(sessionId: string, uploadId: string): void {
const state = this.clientStates.get(sessionId);
const uploadState = this.activeUploads.get(uploadId);
if (!state) {
console.warn(`[SFTP Upload ${uploadId}] Request to cancel, but session ${sessionId} not found.`);
// Can't send message back if session is gone
this.cancelUploadInternal(uploadId, 'Session not found'); // Clean up if state exists
return;
}
if (!uploadState) {
console.warn(`[SFTP Upload ${uploadId}] Request to cancel, but no active upload found.`);
state.ws.send(JSON.stringify({ type: 'sftp:upload:error', payload: { uploadId, message: '无效的上传 ID 或上传已取消/完成' } }));
return;
}
console.log(`[SFTP Upload ${uploadId}] Cancelling upload for ${uploadState.remotePath}`);
this.cancelUploadInternal(uploadId, 'User cancelled');
state.ws.send(JSON.stringify({ type: 'sftp:upload:cancelled', payload: { uploadId } }));
}
/** Internal helper to clean up an upload */
private cancelUploadInternal(uploadId: string, reason: string): void {
const uploadState = this.activeUploads.get(uploadId);
if (uploadState) {
console.log(`[SFTP Upload ${uploadId}] Internal cancel (${reason}): Closing stream for ${uploadState.remotePath}`);
// End the stream. The 'close' handler should ideally detect the size mismatch or see the state is gone.
// Using destroy might be more immediate but could lead to unclosed file descriptors on the server in some cases.
uploadState.stream.end(); // Gracefully try to end
// uploadState.stream.destroy(); // More forceful, might be needed
this.activeUploads.delete(uploadId);
} else {
// console.log(`[SFTP Upload ${uploadId}] Internal cancel called, but upload state already removed.`);
}
}
}