fix: 空渠道检测改用JSONObject.has + 移除gitignore误排除manifest

search_text.py

@@ -0,0 +1,35 @@
+"""
+Search for readable ASCII strings in the decoded text from screen.png.
+"""
+import sys
+import re
+
+path = r"D:\Yuzu-GCA\screen.png"
+
+with open(path, 'rb') as f:
+    raw = f.read()
+
+# Decode as UTF-16 LE
+text = raw.decode('utf-16-le')
+
+# Find all printable ASCII sequences of length >= 4
+matches = re.findall(r'[ -~]{4,}', text)
+print(f"Found {len(matches)} ASCII strings of length >= 4")
+print("\n=== First 60 matches ===")
+for i, m in enumerate(matches[:60]):
+    print(f"  [{i}] '{m}'")
+
+# Also search for specific patterns
+patterns = ['OTA', 'update', 'download', 'install', 'version', 'error', 'fail', 
+            'success', 'manifest', 'SHA256', 'verify', 'check', '完成', '下载',
+            '安装', '校验', '版本', '测试', '日志']
+print("\n=== Pattern search ===")
+for p in patterns:
+    count = text.count(p)
+    if count > 0:
+        # Find context around first occurrence
+        idx = text.find(p)
+        start = max(0, idx - 30)
+        end = min(len(text), idx + len(p) + 50)
+        ctx = text[start:end].encode('ascii', errors='replace').decode('ascii')
+        print(f"  '{p}' found {count} times. First context: ...{ctx}...")