chore: import upstream snapshot with attribution

apps/sim/app/api/tools/ssh/read-file-content/route.ts

@@ -0,0 +1,123 @@
+import { createLogger } from '@sim/logger'
+import { getErrorMessage } from '@sim/utils/errors'
+import { generateId } from '@sim/utils/id'
+import { type NextRequest, NextResponse } from 'next/server'
+import type { Client, SFTPWrapper } from 'ssh2'
+import { sshReadFileContentContract } from '@/lib/api/contracts/storage-transfer'
+import { parseRequest } from '@/lib/api/server'
+import { checkInternalAuth } from '@/lib/auth/hybrid'
+import { withRouteHandler } from '@/lib/core/utils/with-route-handler'
+import { createSSHConnection, sanitizePath } from '@/app/api/tools/ssh/utils'
+
+const logger = createLogger('SSHReadFileContentAPI')
+
+function getSFTP(client: Client): Promise<SFTPWrapper> {
+  return new Promise((resolve, reject) => {
+    client.sftp((err, sftp) => {
+      if (err) {
+        reject(err)
+      } else {
+        resolve(sftp)
+      }
+    })
+  })
+}
+
+export const POST = withRouteHandler(async (request: NextRequest) => {
+  const requestId = generateId().slice(0, 8)
+
+  try {
+    const auth = await checkInternalAuth(request)
+    if (!auth.success || !auth.userId) {
+      logger.warn(`[${requestId}] Unauthorized SSH read file content attempt`)
+      return NextResponse.json({ error: auth.error || 'Unauthorized' }, { status: 401 })
+    }
+
+    const parsed = await parseRequest(sshReadFileContentContract, request, {})
+    if (!parsed.success) return parsed.response
+    const params = parsed.data.body
+
+    logger.info(
+      `[${requestId}] Reading file content from ${params.path} on ${params.host}:${params.port}`
+    )
+
+    const client = await createSSHConnection({
+      host: params.host,
+      port: params.port,
+      username: params.username,
+      password: params.password,
+      privateKey: params.privateKey,
+      passphrase: params.passphrase,
+    })
+
+    try {
+      const sftp = await getSFTP(client)
+      const filePath = sanitizePath(params.path)
+      const maxBytes = params.maxSize * 1024 * 1024 // Convert MB to bytes
+
+      const stats = await new Promise<{ size: number }>((resolve, reject) => {
+        sftp.stat(filePath, (err, stats) => {
+          if (err) {
+            reject(new Error(`File not found: ${filePath}`))
+          } else {
+            resolve(stats)
+          }
+        })
+      })
+
+      if (stats.size > maxBytes) {
+        return NextResponse.json(
+          { error: `File size (${stats.size} bytes) exceeds maximum allowed (${maxBytes} bytes)` },
+          { status: 400 }
+        )
+      }
+
+      const content = await new Promise<string>((resolve, reject) => {
+        const chunks: Buffer[] = []
+        let totalBytes = 0
+        const readStream = sftp.createReadStream(filePath)
+
+        readStream.on('data', (chunk: Buffer) => {
+          totalBytes += chunk.length
+          if (totalBytes > maxBytes) {
+            readStream.destroy()
+            reject(new Error(`File exceeds maximum allowed size of ${params.maxSize}MB`))
+            return
+          }
+          chunks.push(chunk)
+        })
+
+        readStream.on('end', () => {
+          const buffer = Buffer.concat(chunks)
+          resolve(buffer.toString(params.encoding as BufferEncoding))
+        })
+
+        readStream.on('error', reject)
+      })
+
+      const lines = content.split('\n').length
+
+      logger.info(
+        `[${requestId}] File content read successfully: ${stats.size} bytes, ${lines} lines`
+      )
+
+      return NextResponse.json({
+        content,
+        size: stats.size,
+        lines,
+        path: filePath,
+        message: `File read successfully: ${stats.size} bytes, ${lines} lines`,
+      })
+    } finally {
+      client.end()
+    }
+  } catch (error) {
+    const errorMessage = getErrorMessage(error, 'Unknown error occurred')
+    logger.error(`[${requestId}] SSH read file content failed:`, error)
+
+    return NextResponse.json(
+      { error: `SSH read file content failed: ${errorMessage}` },
+      { status: 500 }
+    )
+  }
+})