GridFS通過_id下載找到文件，文件名爲

Question

我想用multer和gridfs在express/mongodb中發佈文件。

這個文件在前端與一個鏈接，如果我點擊它，我想顯示文件的真實名稱，例如「example.pdf」，而不是：id.pdf。現在發佈工作完全正常，我也可以保存原始文件名，但通過點擊鏈接獲取文件時，文件名不再是原始文件。即使我嘗試設置之前。

這裏是我的GET和POST兩個函數：

var router = require('express').Router(); 
 
var mongoose = require('mongoose'); 
 
var conn = mongoose.connection; 
 
var Grid = require('gridfs-stream'); 
 
Grid.mongo = mongoose.mongo; 
 
var gfs = Grid(conn.db); 
 
var fs = require('fs'); 
 

 
router.post('/', function(req, res) { 
 
    var dirname = require('path').dirname(__dirname); 
 
    var filename = req.file.filename; 
 
    var path = req.file.path; 
 

 
    var type = req.file.mimetype; 
 
    var read_stream = fs.createReadStream(dirname + '/' + path); 
 

 
    var writestream = gfs.createWriteStream({ 
 
     _id: filename, 
 
    'filename': req.file.originalname, 
 
    mode: 'w', 
 
    content_type: type 
 
    }); 
 
    read_stream.pipe(writestream); 
 

 
    writestream.on('close', function (file) { 
 
    res.status(200).json({'filename': filename}); 
 
    }); 
 
}); 
 

 
router.get('/:id',function(req , res) { 
 
    var file_id = req.params.id; 
 

 
    gfs.files.find({_id: file_id}).toArray(function (err, files) { 
 
    if (err) { 
 
     res.json(err); 
 
    } 
 
    if (files.length > 0) { 
 
     var mime = files[0].contentType; 
 
     var filename = files[0].filename; 
 
     res.set('Content-Type', mime); 
 
     res.set('originalname', filename); 
 
     var read_stream = gfs.createReadStream({_id: file_id}); 
 
     read_stream.pipe(res); 
 
    } else { 
 
     res.json('File Not Found'); 
 
    } 
 
    }); 
 
}); 
 

 
module.exports = router;

Answer 1

我設法解決我的問題，獲取文件的正確名稱，我不得不設置東西的反應，這個問題計算器上的進一步解釋是：

related question

我想出了再改一點點把它像這樣我的代碼，這裏是改進代碼：

var router = require('express').Router(); 
 
var mongoose = require('mongoose'); 
 
var conn = mongoose.connection; 
 
var Grid = require('gridfs-stream'); 
 
Grid.mongo = mongoose.mongo; 
 
var gfs = Grid(conn.db); 
 
var fs = require('fs'); 
 

 
router.post('/', function(req, res) { 
 
    var dirname = require('path').dirname(__dirname); 
 
    var filename = req.file.filename; 
 
    var path = req.file.path; 
 
    var type = req.file.mimetype; 
 
    var read_stream = fs.createReadStream(dirname + '/' + path); 
 

 
    var writestream = gfs.createWriteStream({ 
 
     _id: filename, 
 
    'filename': req.file.originalname, 
 
    mode: 'w', 
 
    content_type: type 
 
    }); 
 
    read_stream.pipe(writestream); 
 

 
    writestream.on('close', function (file) { 
 
    res.status(200).json({'filename': filename}); 
 
    }); 
 
}); 
 

 
router.get('/:id',function(req , res) { 
 
    var file_id = req.params.id; 
 

 
    gfs.files.find({_id: file_id}).toArray(function (err, files) { 
 
    if (err) { 
 
     res.json(err); 
 
    } 
 
    if (files.length > 0) { 
 
     var mime = files[0].contentType; 
 
     var filename = files[0].filename; 
 
     res.set('Content-Type', mime); 
 
     res.set('Content-Disposition', "inline; filename=" + filename); 
 
     var read_stream = gfs.createReadStream({_id: file_id}); 
 
     read_stream.pipe(res); 
 
    } else { 
 
     res.json('File Not Found'); 
 
    } 
 
    }); 
 
}); 
 

 
module.exports = router;

我希望它能夠向那些誰也得到因爲同樣的原因被卡住了一些幫助，我要感謝誰通過閱讀問題前的人。