32 lines
3.8 KiB
TypeScript
32 lines
3.8 KiB
TypeScript
export type DownloadFailure = {
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code: string;
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message: string;
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recommendation: string;
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status: number;
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retryable: boolean;
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};
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export function getDownloadFailure(error: unknown): DownloadFailure {
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const text = error && typeof error === "object" && "message" in error
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? `${"name" in error ? error.name : "Error"}: ${error.message}` : String(error || "");
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const failure = (code: string, message: string, recommendation: string, status: number, retryable = false) =>
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({ code, message, recommendation, status, retryable });
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if (/旧存储已停用|storage_retired/.test(text)) return failure("STORAGE_RETIRED", "原图所在的旧存储已停用。", "请重新上传原图；重试下载无法恢复该文件。", 410);
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if (/HTTP (?:404|410)|SOURCE_NOT_FOUND/i.test(text)) return failure("SOURCE_NOT_FOUND", "原图链接已失效或源文件已被删除。", "请重新上传原图，或联系管理员核对归档副本；无需重新生成图片。", 404);
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if (/HTTP (?:401|403)|SOURCE_FORBIDDEN/i.test(text)) return failure("SOURCE_FORBIDDEN", "图片源站拒绝访问原图。", "请联系管理员检查原图访问权限或链接有效期，并提供下载编号。", 403);
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if (/queue.*busy|正在准备的原图较多|DOWNLOAD_BUSY/i.test(text)) return failure("DOWNLOAD_BUSY", "正在准备的下载较多。", "请等待当前下载完成后再试，避免同时重复点击。", 429, true);
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if (/TimeoutError|AbortError|timeout|timed out|deadline|超时|HTTP (?:408|504|524)/i.test(text)) return failure("SOURCE_TIMEOUT", "读取原图或准备下载文件超时。", "请稍后再次下载；持续失败时联系管理员并提供下载编号，已归档的原图无需重新生成。", 504, true);
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if (/fetch failed|failed to fetch|ECONN|ENOTFOUND|EAI_AGAIN|network|HTTP (?:429|5\d\d)/i.test(text)) return failure("SOURCE_UNAVAILABLE", "暂时无法连接图片源站。", "请稍后重试下载；持续失败时联系管理员检查取图线路，并提供下载编号。", 503, true);
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if (/not.*image|error document|不是图片|无法识别图片|empty response|image is empty|Invalid prepared original/i.test(text)) return failure("INVALID_IMAGE", "源地址没有返回可用的图片文件。", "请重新上传可打开的原图；若原图正常，请联系管理员并提供下载编号。", 422);
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if (/sharp|pngload|jpegload|unsupported image|无法解析图片|convert|转换/i.test(text)) return failure("IMAGE_CONVERSION_FAILED", "原图无法转换为下载所需的 PNG 文件。", "请保留原图并联系管理员提供下载编号，或重新上传 PNG/JPEG 图片。", 422);
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if (/upload|存储桶|保存下载|STORAGE_WRITE_FAILED/i.test(text)) return failure("DOWNLOAD_STORAGE_FAILED", "下载文件保存失败，已归档的原图仍然保留。", "请稍后重试；持续失败时联系管理员检查存储，并提供下载编号。", 503, true);
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if (/未登录/.test(text)) return failure("LOGIN_REQUIRED", "登录状态已失效。", "请重新登录后下载，当前图片不会因此删除。", 401);
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if (/无法确认原图/.test(text)) return failure("ORIGINAL_IMAGE_UNCONFIRMED", "图片链接包含处理参数，无法确认原图。", "请选择未裁剪、未缩放的原图链接，或重新上传原图。", 400);
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if (/图片地址无效/.test(text)) return failure("INVALID_IMAGE_URL", "图片地址无效。", "请刷新画布后重新选择图片；仍然失败时请重新上传原图。", 400);
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return failure("DOWNLOAD_FAILED", "下载准备未能完成。", "请联系管理员并提供下载编号，以便核对原图、转换和存储的具体错误；无需重新生成。", 500, true);
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}
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export function formatDownloadFailure(failure: DownloadFailure, requestId?: string) {
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return `${failure.message}${failure.recommendation}${requestId ? `\n下载编号：${requestId}` : ""}`;
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}
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