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import {
All,
Controller,
Get,
Logger,
Param,
Post,
Req,
Res
} from '@nestjs/common';
import { ConfigService } from './config/config.service';
import { MCPServerService } from './mcp/mcp-server.service';
@Controller()
export class AppController {
private readonly logger = new Logger(AppController.name);
constructor(
private configService: ConfigService,
private mcpServerService: MCPServerService
) {}
@Get()
healthCheck() {
return { status: 'ok' };
}
@Get(':clientName/sse')
async handleSSE(
@Param('clientName') clientName: string,
@Req() req: Request,
@Res() res: Response
) {
const config = this.configService.getConfig();
const clientConfig = config.mcpServers[clientName];
if (!clientConfig) {
return res.status(404).json({ error: 'Client not found' });
}
// Check authentication if configured
if (
clientConfig.options?.authTokens &&
clientConfig.options.authTokens.length > 0
) {
const authHeader = req.headers.authorization;
if (!authHeader) {
return res.status(401).json({ error: 'Unauthorized' });
}
const token = authHeader.replace(/^Bearer /, '').trim();
if (!clientConfig.options.authTokens.includes(token)) {
return res.status(401).json({ error: 'Unauthorized' });
}
}
try {
await this.mcpServerService.handleSSERequest(clientName, req, res);
} catch (error) {
this.logger.error(
[
'Error handling SSE for ',
clientName,
': ',
String(error)
].join('')
);
if (!res.headersSent) {
res.status(500).json({ error: 'Internal server error' });
}
}
}
@Post(':clientName/message')
async handlePostMessage(
@Param('clientName') clientName: string,
@Req() req: Request,
@Res() res: Response
): Promise<void> {
const config = this.configService.getConfig();
const clientConfig = config.mcpServers[clientName];
if (!clientConfig) {
res.status(404).json({ error: 'Client not found' });
return;
}
// Check authentication if configured
if (
clientConfig.options?.authTokens &&
clientConfig.options.authTokens.length > 0
) {
const authHeader = req.headers.authorization;
if (!authHeader) {
res.status(401).json({ error: 'Unauthorized' });
return;
}
const token = authHeader.replace(/^Bearer /, '').trim();
if (!clientConfig.options.authTokens.includes(token)) {
res.status(401).json({ error: 'Unauthorized' });
return;
}
}
try {
await this.mcpServerService.handlePostMessage(clientName, req, res);
} catch (error) {
this.logger.error(
[
'Error handling POST message for ',
clientName,
': ',
String(error)
].join('')
);
if (!res.headersSent) {
res.status(500).json({ error: 'Internal server error' });
}
}
}
@All(':clientName')
async handleStreamableHTTP(
@Param('clientName') clientName: string,
@Req() req: Request,
@Res() res: Response
) {
const config = this.configService.getConfig();
const clientConfig = config.mcpServers[clientName];
if (!clientConfig) {
return res.status(404).json({ error: 'Client not found' });
}
// Check authentication if configured
if (
clientConfig.options?.authTokens &&
clientConfig.options.authTokens.length > 0
) {
const authHeader = req.headers.authorization;
if (!authHeader) {
return res.status(401).json({ error: 'Unauthorized' });
}
const token = authHeader.replace(/^Bearer /, '').trim();
if (!clientConfig.options.authTokens.includes(token)) {
return res.status(401).json({ error: 'Unauthorized' });
}
}
// Only handle streamable-http if server type is streamable-http
const serverType = config.mcpProxy.type || 'sse';
if (serverType !== 'streamable-http') {
// For SSE, use the SSE endpoint
if (req.method === 'GET') {
return this.handleSSE(clientName, req, res);
}
// For POST to SSE, use handlePostMessage
if (req.method === 'POST') {
return this.handlePostMessage(clientName, req, res);
}
return res.status(404).json({ error: 'Endpoint not found' });
}
try {
await this.mcpServerService.handleStreamableHTTPRequest(
clientName,
req,
res
);
} catch (error) {
this.logger.error(
[
'Error handling Streamable HTTP for ',
clientName,
': ',
String(error)
].join('')
);
if (!res.headersSent) {
res.status(500).json({ error: 'Internal server error' });
}
}
}
}
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