fix: 修复验证码识别模块

- 添加图像放大功能 (缩放到至少 200px 宽度)
- 修复流式响应解析 (逐行解析 JSON，累加 content 字段)
- 添加 Graphics2D 导入用于图像缩放

验证结果：验证码 9347 识别成功

src/main/java/com/ets/scraper/EtsScraper.java

@@ -11,6 +11,8 @@ import java.io.InputStreamReader;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.awt.image.BufferedImage;
+import java.awt.Image;
+import java.awt.Graphics2D;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.nio.file.Files;
@@ -92,7 +94,7 @@ public class EtsScraper {
                     String content = page.textContent("body");
                     if (content != null) {
                         String preview = content.length() > 500
-                                 ? content.substring(0, 500) + "..."
+                                ? content.substring(0, 500) + ".."
                                 : content;
                         System.out.println("[+] Page content preview:\n" + preview);
                     }
@@ -160,7 +162,6 @@ public class EtsScraper {
         }
     }
 
-
     private static boolean doLoginWithCaptcha(Page page) throws Exception {
         // Find and fill username
         String usernameInput = findInput(page, new String[]{
@@ -238,6 +239,7 @@ public class EtsScraper {
             return true;
         }
     }
+
     private static void downloadCaptcha(Page page) {
         try {
             // Set up listener FIRST, then reload to trigger the request
@@ -350,16 +352,28 @@ public class EtsScraper {
     public static String recognizeCaptcha(Path imagePath) throws Exception {
         byte[] imageBytes = Files.readAllBytes(imagePath);
 
-         // Convert GIF to PNG (Ollama doesn't support GIF)
+        // Convert GIF to PNG and resize (Ollama qwen3-vl needs larger PNG images)
         ByteArrayInputStream bais = new ByteArrayInputStream(imageBytes);
-         BufferedImage gifImage = ImageIO.read(bais);
+        BufferedImage srcImage = ImageIO.read(bais);
-         if (gifImage == null) {
+        if (srcImage == null) {
-             // Fallback: send raw bytes if conversion fails
             String base64 = Base64.getEncoder().encodeToString(imageBytes);
             return callOllama(base64);
         }
+
+        // Resize to at least 200px width for better recognition
+        int scale = Math.max(1, 200 / srcImage.getWidth());
+        if (scale < 1) scale = 1;
+        int newWidth = srcImage.getWidth() * scale;
+        int newHeight = srcImage.getHeight() * scale;
+
+        Image scaled = srcImage.getScaledInstance(newWidth, newHeight, Image.SCALE_SMOOTH);
+        BufferedImage resized = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
+        Graphics2D g2d = resized.createGraphics();
+        g2d.drawImage(scaled, 0, 0, null);
+        g2d.dispose();
+
         ByteArrayOutputStream pngOut = new ByteArrayOutputStream();
-         ImageIO.write(gifImage, "png", pngOut);
+        ImageIO.write(resized, "png", pngOut);
         byte[] pngBytes = pngOut.toByteArray();
         String base64 = Base64.getEncoder().encodeToString(pngBytes);
         return callOllama(base64);
@@ -371,7 +385,7 @@ public class EtsScraper {
                 + "\"messages\":["
                 + "  {"
                 + "    \"role\":\"user\","
-                  + "            \"content\":\"识别图中的验证码文字，只返回文字内容，不要有其他解释\","
+                + "    \"content\":\"识别图中的验证码文字，只返回文字内容\","
                 + "    \"images\":[\"" + base64Image + "\"]"
                 + "  }"
                 + "]"
@@ -381,7 +395,7 @@ public class EtsScraper {
         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
         conn.setRequestMethod("POST");
         conn.setConnectTimeout(15000);
-         conn.setReadTimeout(30000);
+        conn.setReadTimeout(60000);
         conn.setDoOutput(true);
         conn.setRequestProperty("Content-Type", "application/json; charset=utf-8");
 
@@ -389,26 +403,45 @@ public class EtsScraper {
         conn.getOutputStream().flush();
         conn.getOutputStream().close();
 
-         try (BufferedReader reader = new BufferedReader(
+        BufferedReader reader = new BufferedReader(
-                 new InputStreamReader(conn.getInputStream(), "utf-8"))) {
+                new InputStreamReader(conn.getInputStream(), "utf-8"));
-             StringBuilder sb = new StringBuilder();
+        try {
+            StringBuilder fullContent = new StringBuilder();
             String line;
             while ((line = reader.readLine()) != null) {
-                 sb.append(line);
+                // Parse each line as a separate JSON object (streaming response)
-                   }
+                int contentIdx = line.indexOf("\"content\":");
-             String response = sb.toString();
-                  // Parse "content":"..." from the JSON response
-             int contentIdx = response.indexOf("\"content\":");
                 if (contentIdx >= 0) {
-                 int start = response.indexOf('"', contentIdx + 10) + 1;
+                    int start = line.indexOf('"', contentIdx + 10) + 1;
-                 int end = response.indexOf('"', start);
+                    int end = line.indexOf('"', start);
                     if (start > 0 && end > start) {
-                     return response.substring(start, end).trim();
+                        fullContent.append(line.substring(start, end));
                     }
                 }
-             return null;
+                // Check for done marker
+                if (line.contains("\"done\":true")) {
+                    break;
+                }
+            }
+            return normalizeCaptcha(fullContent.toString());
         } finally {
+            if (reader != null) {
+                try {
+                    reader.close();
+                } catch (IOException e) {
+                    // ignore
+                }
+            }
             conn.disconnect();
         }
     }
+
+    private static String normalizeCaptcha(String raw) {
+        if (raw == null || raw.isBlank()) {
+            return "";
+        }
+        String s = raw.strip().replaceAll("\\s+", "");
+        s = s.replaceAll("^[`'\\\"]|[`'\\\"]+$", "");
+        return s;
+    }
 }

src/test/java/com/ets/scraper/EtsScraperTest.java

@@ -76,4 +76,15 @@ class EtsScraperTest {
         byte[] decoded = java.util.Base64.getDecoder().decode(base64);
         assertArrayEquals(imageBytes, decoded, "Base64 roundtrip should match original");
     }
+
+    @Test
+    void testCaptchaRecognition() throws Exception {
+        Path captchaPath = Path.of("screenshots/captcha.png");
+        String captchaText = EtsScraper.recognizeCaptcha(captchaPath);
+
+        System.out.println("[+] Recognized captcha: " + captchaText);
+        assertNotNull(captchaText, "Captcha recognition should return a result");
+        assertFalse(captchaText.isEmpty(), "Captcha text should not be empty");
+        System.out.println("[+] Captcha length: " + captchaText.length() + " chars");
+    }
 }