image server

Author: James Halliday

leveldb/image_server.js

@@ -0,0 +1,41 @@
+var fs = require('fs');
+var http = require('http');
+var blob = require('content-addressable-blob-store');
+var through = require('through2');
+var store = blob({ dir: './blobs' });
+var level = require('level');
+var db = level('./db', { valueEncoding: 'json' });
+
+var server = http.createServer(function (req, res) {
+    if (req.method === 'POST') {
+        var w = store.createWriteStream();
+        req.pipe(w);
+        w.on('finish', function () {
+            var now = new Date().toISOString();
+            var nowkey = 'images-recent!' + now + '!' + w.key;
+            db.batch([
+                { type: 'put', key: 'images!' + w.key, value: 0 },
+                { type: 'put', key: nowkey, value: 0 }
+            ], function (err) {
+                if (err) res.end(err + '\n')
+                else res.end(w.key + '\n')
+            });
+        });
+    }
+    else if (req.url === '/images') {
+        var r = db.createReadStream({
+            gt: 'images-recent!',
+            lt: 'images-recent!~'
+        })
+        r.pipe(through.obj(function (row, enc, next) {
+            this.push(row.key.split('!')[2] + '\n');
+            next();
+        })).pipe(res);
+    }
+    else {
+        var r = store.createReadStream({ key: req.url.slice(1) });
+        r.on('error', function (err) { res.end(err + '\n') });
+        r.pipe(res);
+    }
+});
+server.listen(5000);