OdysseusYuan/LKY_OfficeTools · error · Exception

无法获取 PerpetualVL2021 对应的下载地址！

Error message

无法获取 PerpetualVL2021 对应的下载地址！

What it means

Thrown when the PerpetualVL2021 block is found (latest_info is non-empty) but the baseUrl field cannot be extracted from within it. The code looks for the marker `baseUrl":"` inside the extracted block. Unlike error 24, this fires at a later stage: the channel block exists but the download-URL field is absent or reformatted. The resulting URL would be combined with a hard-coded "/office/data" suffix to form OfficeUrlRoot.

Source

Thrown at LKY_OfficeTools/Lib/Lib_OfficeInfo.cs:180

                        {
                            return null;
                        }

                        new Log("\n------> 正在解析 最新可用 Office 下载服务器 ...", ConsoleColor.DarkCyan);

                        //获取版本信息
                        string latest_info = Com_TextOS.GetCenterText(OfficeChannelInfo, "\"PerpetualVL2021\",", "name");                     //获取 2021 LTSC
                        if (!string.IsNullOrEmpty(latest_info))
                        {
                            //获取office下载地址
                            var url = Com_TextOS.GetCenterText(latest_info, "baseUrl\":\"", "\"");                         //官方Json取值，格式和自己的不一样，千万注意

                            new Log($"     √ 已获得 Office 最新下载服务器信息", ConsoleColor.DarkGreen);

                            return _office_url_root = url + "/office/data";
                        }

                        throw new Exception("无法获取 PerpetualVL2021 对应的下载地址！");
                    }
                    catch (Exception Ex)
                    {
                        new Log("     × 无法获取 最新可用 Office 下载服务器", ConsoleColor.DarkRed);
                        new Log(Ex.ToString());
                        return null;
                    }
                }
            }

            private static List<string> _office_file_list;
            internal static List<string> OfficeFileList
            {
                get
                {
                    try
                    {
                        //非空返回

View on GitHub (pinned to 6f9a1bd471)

Solutions

1. Inspect the raw PerpetualVL2021 block content to see the current field name for the download URL.
2. Update the baseUrl marker string in GetCenterText to match Microsoft's current field name/escaping.
3. Switch to structured JSON parsing so nested/moved fields are accessed by path, not string markers.
4. Verify the resulting URL + "/office/data" still resolves against Microsoft's current CDN layout.
5. Add a regression test using a captured channel JSON sample.

Example fix

// before
var url = Com_TextOS.GetCenterText(latest_info, "baseUrl\":\"", "\"");
return _office_url_root = url + "/office/data";
...
throw new Exception("无法获取 PerpetualVL2021 对应的下载地址！");

// after — structured field access with a null-safe message
var json = JObject.Parse(OfficeChannelInfo);
var channel = json["PerpetualVL2021"];
var baseUrlToken = channel?["baseUrl"];
if (baseUrlToken == null)
    throw new Exception("PerpetualVL2021 缺少 baseUrl 字段，CDN 结构可能已变更。");
return _office_url_root = baseUrlToken.ToString() + "/office/data";

// Confirm the baseUrl field is present inside the PerpetualVL2021 block before relying on it.
string latest_info = Com_TextOS.GetCenterText(OfficeChannelInfo, "\"PerpetualVL2021\",", "name");
string url = string.IsNullOrEmpty(latest_info) ? null
    : Com_TextOS.GetCenterText(latest_info, "baseUrl\":\"", "\"");
if (string.IsNullOrEmpty(url))
{
    new Log("PerpetualVL2021 块中缺少 baseUrl 字段，CDN 结构可能已变更。", ConsoleColor.DarkRed);
    return;
}

When it happens

Trigger: (a) The PerpetualVL2021 block is present but the baseUrl field was renamed or removed by Microsoft; (b) the field's escaping/quoting changed so the `baseUrl":"` marker no longer matches; (c) Microsoft restructured the CDN URL field while keeping version data intact (so error 24 passes but this one fires).

Common situations: Microsoft changed the download URL field name in the channel JSON; the JSON escaping changed (e.g., pretty-printed vs compact); a CDN restructure moved baseUrl to a nested object; the channel data was partially published.

Related errors

• 无法获取 PerpetualVL2021 对应的版本号！
• OfficeChannels_Url 信息获取失败！
• Office 信息获取失败！

AI-assisted analysis of OdysseusYuan/LKY_OfficeTools@6f9a1bd471 (2026-08-13). Data as JSON: /api/errors/778484376fa03753. Report an issue: GitHub.