BUGFIX:为下载flux图片添加重试功能

src/main/java/com/ai/da/service/impl/GenerateServiceImpl.java

@@ -3934,11 +3934,48 @@ public class GenerateServiceImpl extends ServiceImpl<GenerateMapper, Generate> i
     }
 
     public byte[] downloadVideoOrImage(String url) {
-        try (CloseableHttpClient client = HttpClients.createDefault();
-             InputStream in = client.execute(new HttpGet(url)).getEntity().getContent()) {
-            return IOUtils.toByteArray(in);
+        int maxRetries = 3;
+        int retryDelayMs = 1000;
+        IOException lastException = null;
+
+        for (int attempt = 1; attempt <= maxRetries; attempt++) {
+            try {
+                return downloadWithTimeout(url, 30000, 60000);
             } catch (IOException e) {
-            throw new RuntimeException(e);
+                lastException = e;
+                log.warn("下载失败 (尝试 {}/{}): {}", attempt, maxRetries, e.getMessage());
+
+                if (attempt < maxRetries) {
+                    try {
+                        Thread.sleep((long) retryDelayMs * attempt); // 递增延迟
+                    } catch (InterruptedException ie) {
+                        Thread.currentThread().interrupt();
+                        throw new RuntimeException(ie);
+                    }
+                }
+            }
+        }
+
+        throw new RuntimeException("下载失败，已重试 " + maxRetries + " 次", lastException);
+    }
+
+    private byte[] downloadWithTimeout(String url, int connectTimeout, int socketTimeout) throws IOException {
+        RequestConfig requestConfig = RequestConfig.custom()
+                .setConnectTimeout(connectTimeout)
+                .setSocketTimeout(socketTimeout)
+                .setConnectionRequestTimeout(connectTimeout)
+                .build();
+
+        try (CloseableHttpClient client = HttpClients.custom()
+                .setDefaultRequestConfig(requestConfig)
+                .build();
+             CloseableHttpResponse response = client.execute(new HttpGet(url))) {
+
+            int statusCode = response.getStatusLine().getStatusCode();
+            if (statusCode != 200) {
+                throw new IOException("HTTP Error: " + statusCode);
+            }
+            return IOUtils.toByteArray(response.getEntity().getContent());
         }
     }