fix up

ai_anti_malware/sandbox_api_winhttp.cpp

@@ -396,8 +396,40 @@ auto Api_URLDownloadToFileW(void* sandbox, uc_engine* uc, uint64_t address)
     // 读取URL (宽字符)
     std::wstring wUrlString;
     if (szURL != 0) {
-        wchar_t buffer[1024] = {0};
-        uc_mem_read(uc, szURL, buffer, sizeof(buffer) - sizeof(wchar_t));
+        wchar_t buffer[4096] = {0};
+        // 循环读取URL,每次读取一个wchar_t字符
+        size_t totalRead = 0;
+        const size_t maxSize =
+            sizeof(buffer) - sizeof(wchar_t);  // 预留null终止符空间
+        bool readError = false;
+
+        while (totalRead < maxSize) {
+            wchar_t ch = 0;
+            auto ucError =
+                uc_mem_read(uc, szURL + totalRead, &ch, sizeof(wchar_t));
+
+            if (ucError != UC_ERR_OK) {
+                readError = true;
+                break;
+            }
+
+            // 检查是否遇到宽字符终止符(0x0000)
+            if (ch == 0x0000) {
+                break;
+            }
+
+            buffer[totalRead / sizeof(wchar_t)] = ch;
+            totalRead += sizeof(wchar_t);
+        }
+
+        // 确保字符串以宽字符null结尾
+        buffer[totalRead / sizeof(wchar_t)] = 0x0000;
+
+        if (readError) {
+            printf("[警告] URL读取时发生错误\n");
+            __debugbreak();
+        }
+
         wUrlString = buffer;
 
         // 转换为UTF-8字符串用于日志记录