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我想用multer和gridfs在express/mongodb中發佈文件。GridFS通過_id下載找到文件,文件名爲
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;