Created
April 22, 2020 17:33
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PDF/File creation and download using server-side ASYNC methods in Meteor
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| if (Meteor.isServer) { | |
| /* Use Fibers/Future */ | |
| var Future = Npm.require('fibers/future'); | |
| /* Async Method */ | |
| function generatePDF(id, options, callback){ | |
| check(id, String); | |
| check(options, Object); | |
| check(callback, Function); | |
| var err, | |
| result, | |
| docJson = Documents.findOne({ _id: id }); | |
| document = new DocumentClass({ | |
| doc: docJson | |
| }); | |
| result = document.generateFile(); | |
| callback(err, result); | |
| } | |
| /* Meteor Method */ | |
| Meteor.methods({ | |
| generateFileDownload: function (id, options) { | |
| var fut = new Future(); | |
| var boundCallback = Meteor.bindEnvironment(function (err, res) { | |
| if(err) { | |
| fut.throw(err); | |
| } else { | |
| fut.return(res) | |
| } | |
| }); | |
| generatePDF(id, options, boundCallback); | |
| return fut.wait(); | |
| } | |
| }); | |
| /* Download Action */ | |
| Router.route('/document/:id/download', function () { | |
| var docId = this.params.id; | |
| check(id, String); | |
| generateFileAndReturnSettingsJSON = function () { | |
| Meteor.call('generateFileDownload', { id: docId, options: {} }, function (err, res) { | |
| if(err){ | |
| Meteor.Error(err); | |
| } else { | |
| return res; | |
| } | |
| }); | |
| } | |
| var file = generateFileAndReturnSettingsJSON(), | |
| stat = null; | |
| try { | |
| stat = fs.statSync(file.path); | |
| } catch (_error) { | |
| response.statusCode = 404; | |
| response.end(); | |
| } | |
| this.response.writeHead(200, { | |
| 'Content-Type': 'application/pdf', | |
| 'Content-Disposition': 'attachment; filename=' + file.name, | |
| 'Content-Length': stat.size | |
| }); | |
| fs.createReadStream(file.path).pipe(this.response); | |
| }, { | |
| where: 'server' | |
| }); | |
| } |
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| <template name="pageWithDownloadLink"> | |
| <a href="/document/{{_id}}/download">Download File</a> | |
| </template> |
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