Created
October 24, 2012 20:05
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fetch images and store in pouchdb
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| var path = require('path') | |
| var Pouch = require('pouchdb') | |
| var async = require('async') | |
| var request = require('request') | |
| var queue = async.queue(queueWorker, 5) // 5 requests at a time | |
| var imageURLs = [ | |
| "http://substack.net/images/ben.png", | |
| "http://substack.net/images/bed.png" | |
| ] | |
| queue.drain = function() { | |
| console.log('downloaded all images!') | |
| } | |
| function queueWorker(opts, callback) { | |
| var db = opts.db | |
| var imageURL = opts.imageURL | |
| request(imageURL, function(err, resp, image) { | |
| if (err) return callback(err) | |
| var contentType = resp.headers['content-type'] | |
| saveImageData(db, imageURL, image, contentType , callback) | |
| }) | |
| } | |
| function saveImageData(db, imageURL, imageData, contentType, callback) { | |
| var extension = path.extname(imageURL) | |
| var filename = path.basename(imageURL, extension) | |
| db.put({_id: filename}, function(err, response) { | |
| db.putAttachment(response.id + '/image', response.rev, imageData, contentType, callback) | |
| }) | |
| } | |
| Pouch("ldb://images", function(err, db) { | |
| if (err) return console.log(err) | |
| imageURLs.forEach(function(imageURL) { | |
| queue.push({db: db, imageURL: imageURL}, function() { | |
| console.log('stored', imageURL) | |
| }) | |
| }) | |
| }) |
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