Question

通过其ID或其任何属性获取文件实际上不起作用不知道为什么尝试了所有解决方案

    const Files = require('../../models/GALLERY');
const conn = mongoose.connection;
    Grid.mongo = mongoose.mongo;
    let gfs;

    conn.once("open", () => {
        gfs = Grid(conn.db);




        router.get('/home', (req, res) => {
            Files.find()
                .exec()
                .then(files => {
                    let uploadedFiles = files.map(file => ({
                        file_name: file.name,
                        file_id:file.doc_id,
                        file_type: file.type,
                        file_link: `http://${req.headers.host}/v1/bucket/download?document_id=${file.doc_id}`
                    }));
                    res.json({
                        success: true,
                        uploadedFiles
                    })
                })
                .catch(err => {
                    logger.error(`[*] Error, while getting all uploaded file, with error:  ${err}`);
                    res.status(400).send({
                        message: `Error, while getting all uploaded file, with error: ${err}`
                    });
                });
        });


        router.get('/bucket/download/:id', (req, res) => {
           const id=req.params.id
            gfs.findOne({_id: id }, (err, file) => {
                if (!file) {
                    return res.status(404).send({
                        message: 'File was not found'
                    });
                }
                let data = [];
                let readstream = gfs.createReadStream({
                    filename: file.filename
                });
                readstream.on('data', (chunk) => {
                    data.push(chunk);
                });
                readstream.on('end', () => {
                    data = Buffer.concat(data);
                    let type = fileType(data);
                    res.writeHead(200, {
                        'Content-Type': type.mime,
                        'Content-disposition': 'attachment; filename=' + file.filename + '.' + type.ext,
                        'Content-Length': file.length
                    });
                    res.end(data);
                });
                readstream.on('error', (err) => {
                    //logger.error(`[*] Error, while downloading a file, with error:  ${err}`);
                    res.status(400).send({
                        message: `Error, while downloading a file, with error:  ${err}`
                    });
                });
            });
        });

这是（图库）的模型

    const mongoose = require('mongoose');
const GALLERYSchema = new mongoose.Schema({
    doc_id: {
        type: String
    },
    length : {
        type: Number
    },
    name: {
        type: String
    },
    type: {
        type: String
    }
});

module.exports = mongoose.model('File', GALLERYSchema);

它总是转到（res.status（400）.send（{ 消息：Error, while downloading a file, with error: ${err}）

或找不到蜂箱文件如果有人可以帮助我，或者给我另一种获取文件的方式（图片）要显示，甚至是bas64，这都很棒

通过ID或文件名获取文件

0 个答案: