f.weber/homebrewery
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Add zlib compression to the "text" field. Now, when a file is saved, the original text field is blanked out and the "compressed" binary version is saved instead. Viewing files in Edit page unzips and views them just fine.

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Does not compress old files unless they are opened and resaved by someone. Have not tested on the "share" or "print" pages yet, but should work.
This commit is contained in:
Trevor Buckner
2020-01-05 23:48:50 -05:00
parent a007c5f85f
commit 3ea3d273a5
2 changed files with 10 additions and 0 deletions
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4
server/homebrew.api.js
View File

@@ -1,6 +1,7 @@
const _ = require('lodash');
const HomebrewModel = require('./homebrew.model.js').model;
const router = require('express').Router();
const zlib = require('zlib');
// const getTopBrews = (cb)=>{
// HomebrewModel.find().sort({ views: -1 }).limit(5).exec(function(err, brews) {
@@ -47,6 +48,9 @@ router.put('/api/update/:id', (req, res)=>{
HomebrewModel.get({ editId: req.params.id })
.then((brew)=>{
brew = _.merge(brew, req.body);
brew.textBin = zlib.deflateSync(req.body.text); // Compress brew text to binary before saving
brew.text = ''; // Clear out the non-binary text field so its not saved twice
brew.updatedAt = new Date();
if(req.account) brew.authors = _.uniq(_.concat(brew.authors, req.account.username));

6
server/homebrew.model.js
View File

@@ -1,12 +1,14 @@
const mongoose = require('mongoose');
const shortid = require('shortid');
const _ = require('lodash');
const zlib = require('zlib');
const HomebrewSchema = mongoose.Schema({
shareId : { type: String, default: shortid.generate, index: { unique: true } },
editId : { type: String, default: shortid.generate, index: { unique: true } },
title : { type: String, default: '' },
text : { type: String, default: '' },
textBin : { type: Buffer },
description : { type: String, default: '' },
tags : { type: String, default: '' },
@@ -51,6 +53,10 @@ HomebrewSchema.statics.get = function(query){
return new Promise((resolve, reject)=>{
Homebrew.find(query, (err, brews)=>{
if(err || !brews.length) return reject('Can not find brew');
if(!_.isUndefined(brews[0].textBin)) { // Uncompress zipped text field
unzipped = zlib.unzipSync(brews[0].textBin);
brews[0].text = unzipped.toString();
}
return resolve(brews[0]);
});
});