main

fix: ideo indirme çözüldü

src/app/api/download/serve/route.ts

@@ -0,0 +1,113 @@
+import { NextRequest, NextResponse } from "next/server";
+import * as fs from "fs";
+import * as path from "path";
+import * as os from "os";
+
+const MERGE_DIR = path.join(os.tmpdir(), "yt-merge");
+
+// UUID v4 format validation to prevent path traversal
+const UUID_REGEX = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\.mp4$/i;
+
+/**
+ * GET /api/download/serve?file=<uuid>.mp4&filename=<title>.mp4
+ * Streams a server-side merged video file to the client.
+ * Deletes the file after the response is complete.
+ */
+export async function GET(request: NextRequest): Promise<NextResponse> {
+  const { searchParams } = new URL(request.url);
+  const file = searchParams.get("file");
+  let filename = searchParams.get("filename") || "download.mp4";
+
+  if (!file || !UUID_REGEX.test(file)) {
+    return NextResponse.json(
+      { error: "Invalid or missing file parameter" },
+      { status: 400 }
+    );
+  }
+
+  const filePath = path.join(MERGE_DIR, file);
+
+  // Ensure the resolved path is still inside MERGE_DIR (extra path traversal guard)
+  if (!path.resolve(filePath).startsWith(path.resolve(MERGE_DIR))) {
+    return NextResponse.json(
+      { error: "Invalid file path" },
+      { status: 400 }
+    );
+  }
+
+  if (!fs.existsSync(filePath)) {
+    return NextResponse.json(
+      { error: "File not found or expired" },
+      { status: 404 }
+    );
+  }
+
+  try {
+    const stat = fs.statSync(filePath);
+    const fileSize = stat.size;
+
+    // Encode filename for Content-Disposition
+    const safeFilename = encodeURIComponent(filename)
+      .replace(/['()]/g, escape)
+      .replace(/\*/g, "%2A");
+
+    // Create a ReadableStream from the file
+    const fileStream = fs.createReadStream(filePath);
+    const readable = new ReadableStream({
+      start(controller) {
+        fileStream.on("data", (chunk: Buffer | string) => {
+          const buf = typeof chunk === "string" ? Buffer.from(chunk) : chunk;
+          controller.enqueue(new Uint8Array(buf));
+        });
+        fileStream.on("end", () => {
+          controller.close();
+          // Schedule file deletion after stream completes
+          scheduleCleanup(filePath);
+        });
+        fileStream.on("error", (err) => {
+          console.error("[SERVE] Stream error:", err);
+          controller.error(err);
+        });
+      },
+      cancel() {
+        fileStream.destroy();
+        scheduleCleanup(filePath);
+      },
+    });
+
+    const headers = new Headers();
+    headers.set("Content-Type", "video/mp4");
+    headers.set("Content-Length", fileSize.toString());
+    headers.set(
+      "Content-Disposition",
+      `attachment; filename*=UTF-8''${safeFilename}`
+    );
+
+    return new NextResponse(readable, {
+      status: 200,
+      headers,
+    });
+  } catch (error) {
+    console.error("[SERVE] Error serving file:", error);
+    return NextResponse.json(
+      { error: "Failed to serve file" },
+      { status: 500 }
+    );
+  }
+}
+
+/**
+ * Deletes the file after a short delay to ensure the stream has fully flushed.
+ */
+function scheduleCleanup(filePath: string): void {
+  setTimeout(() => {
+    try {
+      if (fs.existsSync(filePath)) {
+        fs.unlinkSync(filePath);
+        console.log("[SERVE] Cleaned up:", path.basename(filePath));
+      }
+    } catch (err) {
+      console.error("[SERVE] Cleanup error:", err);
+    }
+  }, 5000); // 5 second delay
+}

src/components/site/download/download-result.tsx

@@ -98,7 +98,11 @@ export function DownloadResult({ result, onReset }: DownloadResultProps) {
         {/* Actions */}
         <Flex gap={3} direction={{ base: 'column', sm: 'row' }}>
           <LinkButton
-            href={`/api/proxy?url=${encodeURIComponent(data.downloadUrl)}&filename=${encodeURIComponent(data.filename)}`}
+            href={
+              data.downloadUrl.startsWith('/api/download/serve')
+                ? data.downloadUrl
+                : `/api/proxy?url=${encodeURIComponent(data.downloadUrl)}&filename=${encodeURIComponent(data.filename)}`
+            }
             target="_blank"
             rel="noopener noreferrer"
             colorPalette="primary"

src/lib/download/downloader.ts

@@ -8,7 +8,11 @@
  */
 
 import { snapsave } from "snapsave-media-downloader";
-import { spawn } from "child_process";
+import { spawn, execSync } from "child_process";
+import { randomUUID } from "crypto";
+import * as fs from "fs";
+import * as path from "path";
+import * as os from "os";
 import {
   DownloadRequest,
   DownloadResponse,
@@ -247,8 +251,113 @@ async function runYtdlp(url: string, args: string[] = []): Promise<YtDlpVideoInf
 }
 
 // ============================================
+// Server-Side Merge Helpers (for 1080p+)
+// ============================================
+
+const MERGE_DIR = path.join(os.tmpdir(), "yt-merge");
+const MERGE_FILE_TTL_MS = 10 * 60 * 1000; // 10 minutes
+
 /**
- * Download YouTube video via yt-dlp
+ * Removes merged files older than TTL from the temp directory.
+ * Called before each merge to prevent disk bloat.
+ */
+function cleanupMergedFiles(): void {
+  try {
+    if (!fs.existsSync(MERGE_DIR)) return;
+    const now = Date.now();
+    for (const file of fs.readdirSync(MERGE_DIR)) {
+      const filePath = path.join(MERGE_DIR, file);
+      try {
+        const stat = fs.statSync(filePath);
+        if (now - stat.mtimeMs > MERGE_FILE_TTL_MS) {
+          fs.unlinkSync(filePath);
+          console.log("[CLEANUP] Deleted old merge file:", file);
+        }
+      } catch {
+        // ignore per-file errors
+      }
+    }
+  } catch (err) {
+    console.error("[CLEANUP] Error during cleanup:", err);
+  }
+}
+
+/**
+ * Downloads and merges separate video+audio DASH streams using yt-dlp + ffmpeg.
+ * Returns the local file path of the merged mp4.
+ */
+async function mergeYoutubeStreams(
+  url: string,
+  targetHeight: number
+): Promise<string> {
+  // Ensure merge directory exists
+  if (!fs.existsSync(MERGE_DIR)) {
+    fs.mkdirSync(MERGE_DIR, { recursive: true });
+  }
+
+  // Cleanup old files before creating new ones
+  cleanupMergedFiles();
+
+  const fileId = randomUUID();
+  const outputPath = path.join(MERGE_DIR, `${fileId}.mp4`);
+
+  // Build yt-dlp format string:
+  // Force H.264 (avc1) codec for maximum player compatibility.
+  // AV1 is smaller but most players can't decode it.
+  const formatStr = [
+    `bestvideo[height<=${targetHeight}][vcodec^=avc1]+bestaudio[ext=m4a]`,
+    `bestvideo[height<=${targetHeight}][vcodec^=avc1]+bestaudio`,
+    `bestvideo[height<=${targetHeight}][ext=mp4]+bestaudio[ext=m4a]`,
+    `bestvideo[height<=${targetHeight}]+bestaudio`,
+    `best[height<=${targetHeight}]`,
+  ].join("/");
+
+  return new Promise<string>((resolve, reject) => {
+    const args = [
+      "-f", formatStr,
+      "-S", "vcodec:h264,acodec:aac",  // Sort preference: H.264 video + AAC audio
+      "--merge-output-format", "mp4",
+      "--no-warnings",
+      "--no-check-certificates",
+      "--no-playlist",
+      "-o", outputPath,
+      url,
+    ];
+
+    console.log("[YT-DLP-MERGE] Running: yt-dlp", args.join(" "));
+
+    const proc = spawn("yt-dlp", args);
+
+    let stderr = "";
+    proc.stderr.on("data", (d) => { stderr += d.toString(); });
+    proc.stdout.on("data", (d) => { console.log("[YT-DLP-MERGE]", d.toString().trim()); });
+
+    proc.on("close", (code) => {
+      if (code !== 0) {
+        console.error("[YT-DLP-MERGE] Failed:", stderr);
+        reject(new Error(stderr || `yt-dlp merge exited with code ${code}`));
+        return;
+      }
+      if (!fs.existsSync(outputPath)) {
+        reject(new Error("Merge output file not found"));
+        return;
+      }
+      console.log("[YT-DLP-MERGE] Success:", outputPath);
+      resolve(outputPath);
+    });
+
+    proc.on("error", (err) => {
+      console.error("[YT-DLP-MERGE] Spawn error:", err);
+      reject(err);
+    });
+  });
+}
+
+// ============================================
+/**
+ * Download YouTube video via yt-dlp.
+ * Tries muxed formats first (fast, direct URL).
+ * Falls back to server-side merge for 1080p+ when no muxed format is available.
  */
 async function downloadYoutubeVideo(
   url: string,
@@ -261,8 +370,7 @@ async function downloadYoutubeVideo(
     const info = await runYtdlp(url);
 
     // Find formats that have BOTH video and audio mixed into a single MP4 file.
-    // yt-dlp lists these as having vcodec and acodec
-    const videoFormats = info.formats?.filter(
+    const muxedFormats = info.formats?.filter(
       (f: YtDlpFormat) => 
         f.url && 
         f.ext === "mp4" && 
@@ -272,33 +380,49 @@ async function downloadYoutubeVideo(
         !f.url.includes("/manifest/")
     );
 
-    if (!videoFormats?.length) {
-      return {
-        success: false,
-        error: {
-          code: "error.download.no_result",
-          message: "Uygun video formatı bulunamadı.",
-        },
-      };
-    }
-
-    // Sort to find the requested quality or closest lower quality
-    const sortedFormats = videoFormats.sort((a, b) => (b.height || 0) - (a.height || 0));
-    
-    let bestFormat = sortedFormats.find(f => (f.height || 0) <= targetHeight) || sortedFormats[0];
-
-    // Some 1080p combined might not exist (YouTube usually separates them), fallback gracefully
-    if (!bestFormat) {
-       bestFormat = sortedFormats[0];
-    }
-
     const safeTitle = info.title?.replace(/[^a-zA-Z0-9ğüşıöçĞÜŞİÖÇ\s]/g, "_") || "youtube_video";
 
+    // Try to find a muxed format at the requested quality
+    if (muxedFormats?.length) {
+      const sortedMuxed = muxedFormats.sort((a, b) => (b.height || 0) - (a.height || 0));
+      const bestMuxed = sortedMuxed.find(f => (f.height || 0) <= targetHeight) || sortedMuxed[0];
+      const bestMuxedHeight = bestMuxed.height || 0;
+
+      // If muxed format satisfies the requested quality, use it directly (fast path)
+      if (bestMuxedHeight >= targetHeight || targetHeight <= 720) {
+        console.log(`[YT-DLP-YOUTUBE] Using muxed format: ${bestMuxedHeight}p`);
+        return {
+          success: true,
+          data: {
+            downloadUrl: bestMuxed.url!,
+            filename: `${safeTitle}.mp4`,
+            platform: "youtube",
+            title: info.title,
+            thumbnail: info.thumbnail,
+            mediaType: "video",
+            duration: info.duration_string,
+            author: info.uploader,
+            views: info.view_count?.toString(),
+          },
+        };
+      }
+    }
+
+    // No muxed format at requested quality — do server-side merge
+    console.log(`[YT-DLP-YOUTUBE] No muxed ${targetHeight}p found, falling back to server-side merge...`);
+
+    const mergedPath = await mergeYoutubeStreams(url, targetHeight);
+    const fileId = path.basename(mergedPath);
+    const filename = `${safeTitle}.mp4`;
+
+    // Return a serve URL instead of a direct CDN URL
+    const serveUrl = `/api/download/serve?file=${encodeURIComponent(fileId)}&filename=${encodeURIComponent(filename)}`;
+
     return {
       success: true,
       data: {
-        downloadUrl: bestFormat.url!,
-        filename: `${safeTitle}.mp4`,
+        downloadUrl: serveUrl,
+        filename,
         platform: "youtube",
         title: info.title,
         thumbnail: info.thumbnail,