Initial commit

.gitignore

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+node_modules/

.jshintrc

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+{
+  "curly": true,
+  "eqeqeq": true,
+  "immed": true,
+  "latedef": true,
+  "newcap": true,
+  "noarg": true,
+  "sub": true,
+  "undef": true,
+  "unused": true,
+  "boss": true,
+  "eqnull": true,
+  "node": true
+}

README.md

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+couchmagick
+===========
+Run ImageMagicks `convert` on CouchDB documents.
+
+Installation
+------------
+via npm:
+
+```bash
+npm install couchmagick -g
+```
+
+Configuration
+-------------
+Add couchmagick to the `os_daemons`:
+```ini
+[os_daemons]
+couchmagick = couchmagick
+```
+
+Now CouchDB takes care of the couchmagick process.
+
+```ini
+[couchmagick]
+user = mein-user
+password = secure
+dbs = photos, _users
+filter = 'myapp/myfilter'
+```
+
+Contributing
+------------
+Lint your code via `npm run jshint`.
+
+License
+-------
+Copyright (c) 2012-2013 Johannes J. Schmidt, null2 GmbH
+
+Licensed under the MIT license.

bin/couchmagick

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+#!/usr/bin/env node
+
+require('..')();

index.js

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+/* couchmagick
+ * (c) 2013 Johannes J. Schmidt, null2 GmbH, Berlin 
+ */
+
+'use strict';
+
+var pkg = require('./package.json');
+var couchdbWorker = require('couchdb-worker');
+var url = require('url');
+
+// logging
+function info(msg) {
+  process.stdout.write(JSON.stringify(["log", msg]) + '\n');
+}
+function error(msg) {
+  process.stdout.write(JSON.stringify(["log", msg, {"level": "error"}]) + '\n');
+}
+function debug(msg) {
+  process.stdout.write(JSON.stringify(["log", msg, {"level": "debug"}]) + '\n');
+}
+
+// configuration
+// [httpd]
+//   {"bind_address": "127.0.0.1", "port": "5984"}
+// [couchmagick]
+//   {"dbs": "myfotos"}
+var config = {};
+function parseConfig(data) {
+  debug('parsing config: ' + data);
+
+  try {
+    data = JSON.parse(data);
+  } catch(e) {
+    error('Error parsing config: ' + e);
+  }
+
+  // [httpd]
+  if (data.port) {
+    config.port = data.port;
+  }
+  if (data.bind_address) {
+    config.bind_address = data.bind_address;
+  }
+  
+  // [couchmagick]
+  if (data.dbs) {
+    config.dbs = data.dbs.split(/,\s+/);
+  }
+  if (data.user) {
+    config.user = data.user;
+  }
+  if (data.password) {
+    config.password = data.password;
+  }
+  if (data.filter) {
+    config.filter = data.filter;
+  }
+
+  return config;
+}
+
+// process function
+function convert(doc, db, next) {
+  info('processing doc ' + doc._id + '...');
+  next(null);
+}
+
+// run workers
+function run(config) {
+  if (!config.bind_address) {
+    return;
+  }
+  if (!config.dbs) {
+    return;
+  }
+
+  info('using config: ' + JSON.stringify(config));
+
+  var server = url.format({
+    protocol: 'http',
+    hostname: config.bind_address,
+    port: config.port
+  });
+  debug('using server: ' + server);
+
+  var auth;
+  if (config.user && config.password) {
+    auth = {
+      user: config.user,
+      password: config.password
+    };
+  }
+
+  var followOptions = {};
+  if (config.filter) {
+    followOptions.filter = config.filter;
+  }
+
+  config.dbs.forEach(function(db) {
+    debug('starting worker for ' + db);
+
+    var options = {
+      id: pkg.name,
+      db: {
+        url: url.resolve(server, db),
+        auth: auth
+      },
+      follow: followOptions,
+      process: convert
+    };
+
+    debug('using worker options: ' + JSON.stringify(options));
+
+    try {
+      var worker = couchdbWorker(options);
+
+      worker.on('error', function(err) {
+        error('Serious error: ' + err);
+      });
+
+      worker.on('worker:complete', function(doc) {
+        debug('Completed: ' + doc._id);
+      });
+
+      worker.on('worker:error', function(err, doc) {
+        info('Error processing ' + doc._id  + ' :' + err);
+      });
+
+      worker.start();
+    } catch(e) {
+      error('Error starting worker: ' + e);
+    }
+  });
+}
+
+
+module.exports = function() {
+  process.stdin.on('data', function(data) {
+    if (typeof data !== 'string') {
+      data = data.toString();
+    }
+
+    data.replace(/\s+$/, '').split(/\n+/).forEach(parseConfig);
+
+    run(config);
+  });
+
+  process.stdin.on('end', function () {
+    process.exit(0);
+  });
+
+  // restart on config change
+  process.stdout.write(JSON.stringify(["register", "httpd"]) + '\n');
+  process.stdout.write(JSON.stringify(["register", pkg.name]) + '\n');
+
+  // get config
+  process.stdout.write(JSON.stringify(["get", "httpd"]) + '\n');
+  process.stdout.write(JSON.stringify(["get", pkg.name]) + '\n');
+};

package.json

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+{
+  "name": "couchmagick",
+  "version": "0.0.1",
+  "description": "Run ImageMagicks `convert` on CouchDB documents.",
+  "main": "index.js",
+  "preferGlobal": true,
+  "bin": "bin/couchmagick",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/null2/couchmagick"
+  },
+  "scripts": {
+    "jshint": "jshint -c .jshintrc index.js"
+  },
+  "keywords": [
+    "couchdb",
+    "worker",
+    "convert",
+    "imagemagick",
+    "image-processing",
+    "os_daemon"
+  ],
+  "author": "Johannes J. Schmidt",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/null2/couchmagick/issues"
+  },
+  "homepage": "https://github.com/null2/couchmagick",
+  "dependencies": {
+    "couchdb-worker": "~3.1.1"
+  },
+  "devDependencies": {
+    "jshint": "~2.3.0"
+  }
+}