121 lines
4.1 KiB
TypeScript
121 lines
4.1 KiB
TypeScript
import path from 'path';
|
|
import multer from '@koa/multer';
|
|
import actions from '@nocobase/actions';
|
|
import storageMakers from '../storages';
|
|
import * as Rules from '../rules';
|
|
import { FILE_FIELD_NAME, LIMIT_FILES, LIMIT_MAX_FILE_SIZE } from '../constants';
|
|
|
|
function getRules(ctx: actions.Context) {
|
|
const { resourceField } = ctx.action.params;
|
|
if (!resourceField) {
|
|
return ctx.storage.rules;
|
|
}
|
|
const { rules = {} } = resourceField.getOptions().attachment || {};
|
|
return Object.assign({}, ctx.storage.rules, rules);
|
|
}
|
|
|
|
// TODO(optimize): 需要优化错误处理,计算失败后需要抛出对应错误,以便程序处理
|
|
function getFileFilter(ctx: actions.Context) {
|
|
return (req, file, cb) => {
|
|
// size 交给 limits 处理
|
|
const { size, ...rules } = getRules(ctx);
|
|
const ruleKeys = Object.keys(rules);
|
|
const result = !ruleKeys.length || !ruleKeys
|
|
.some(key => typeof Rules[key] !== 'function'
|
|
|| !Rules[key](file, rules[key], ctx));
|
|
cb(null, result);
|
|
}
|
|
}
|
|
|
|
export async function middleware(ctx: actions.Context, next: actions.Next) {
|
|
const { resourceName, actionName, resourceField } = ctx.action.params;
|
|
if (actionName !== 'upload') {
|
|
return next();
|
|
}
|
|
|
|
// NOTE:
|
|
// 1. 存储引擎选择依赖于字段定义
|
|
// 2. 字段定义中需包含引擎的外键值
|
|
// 3. 无字段时按 storages 表的默认项
|
|
// 4. 插件初始化后应提示用户添加至少一个存储引擎并设为默认
|
|
|
|
const StorageModel = ctx.db.getModel('storages');
|
|
let storage;
|
|
|
|
if (resourceName === 'attachments') {
|
|
// 如果没有包含关联,则直接按默认文件上传至默认存储引擎
|
|
storage = await StorageModel.findOne({ where: { default: true } });
|
|
} else {
|
|
const fieldOptions = resourceField.getOptions();
|
|
storage = await StorageModel.findOne({
|
|
where: fieldOptions.defaultValue
|
|
? { [StorageModel.primaryKeyAttribute]: fieldOptions.defaultValue }
|
|
: { default: true }
|
|
});
|
|
}
|
|
|
|
if (!storage) {
|
|
console.error('[file-manager] no default or linked storage provided');
|
|
return ctx.throw(500);
|
|
}
|
|
// 传递已取得的存储引擎,避免重查
|
|
ctx.storage = storage;
|
|
|
|
const makeStorage = storageMakers.get(storage.type);
|
|
if (!makeStorage) {
|
|
console.error(`[file-manager] storage type "${storage.type}" is not defined`);
|
|
return ctx.throw(500);
|
|
}
|
|
const multerOptions = {
|
|
fileFilter: getFileFilter(ctx),
|
|
limits: {
|
|
fileSize: Math.min(getRules(ctx).size || LIMIT_MAX_FILE_SIZE, LIMIT_MAX_FILE_SIZE),
|
|
// 每次只允许提交一个文件
|
|
files: LIMIT_FILES
|
|
},
|
|
storage: makeStorage(storage),
|
|
};
|
|
const upload = multer(multerOptions);
|
|
return upload.single(FILE_FIELD_NAME)(ctx, next);
|
|
};
|
|
|
|
export async function action(ctx: actions.Context, next: actions.Next) {
|
|
const { [FILE_FIELD_NAME]: file, storage } = ctx;
|
|
if (!file) {
|
|
return ctx.throw(400, 'file validation failed');
|
|
}
|
|
const { associatedName, associatedKey, resourceField } = ctx.action.params;
|
|
const extname = path.extname(file.filename);
|
|
const data = {
|
|
title: file.originalname.replace(extname, ''),
|
|
filename: file.filename,
|
|
extname,
|
|
// TODO(feature): 暂时两者相同,后面 storage.path 模版化以后,这里只是 file 实际的 path
|
|
path: storage.path,
|
|
size: file.size,
|
|
mimetype: file.mimetype,
|
|
// @ts-ignore
|
|
meta: ctx.request.body
|
|
}
|
|
|
|
const attachment = await ctx.db.sequelize.transaction(async transaction => {
|
|
// TODO(optimize): 应使用关联 accessors 获取
|
|
const result = await storage.createAttachment(data, { transaction });
|
|
|
|
if (associatedKey && resourceField) {
|
|
const Attachment = ctx.db.getModel('attachments');
|
|
const SourceModel = ctx.db.getModel(associatedName);
|
|
const source = await SourceModel.findByPk(associatedKey, { transaction });
|
|
await source[resourceField.getAccessors().set](result[Attachment.primaryKeyAttribute], { transaction });
|
|
}
|
|
|
|
return result;
|
|
});
|
|
|
|
// 将存储引擎的信息附在已创建的记录里,节省一次查询
|
|
attachment.setDataValue('storage', storage);
|
|
ctx.body = attachment;
|
|
|
|
await next();
|
|
};
|