go: initial commit (the real one)

3 files changed, 107 insertions, 0 deletions

diff --git a/go/README b/go/README
index 1bc2e7b9..0f9de490 100644
--- a/go/README
+++ b/go/README
@@ -1 +1,16 @@
 go - minimalistic uri shortener
+
+# installation
+    npm install
+
+  optionally
+    npm install hiredis
+
+# run service
+    node .
+
+# clear database
+
+    redis-cli keys 'go:*' | xargs redis-cli del
+
+  if you have changed `redisPrefix`, then use that instead of `go:`.
diff --git a/go/index.js b/go/index.js
new file mode 100644
index 00000000..723fb78a
--- /dev/null
+++ b/go/index.js
@@ -0,0 +1,83 @@
+var httpPort = process.env.PORT || 1337;
+var redisPrefix = 'go:';
+
+var http = require('http');
+var formidable = require('formidable');
+var redis = require('redis');
+
+var redisClient = redis.createClient();
+var httpServer = http.createServer(listener);
+
+redisClient.on('error', function (err) {
+  console.log('redis made a bubu:', err.message);
+  process.exit(23);
+});
+httpServer.listen(httpPort, function () {
+  console.log('http server listening on port', httpPort);
+});
+
+function listener (req, res) {
+  if (req.method === 'POST' && req.url === '/') {
+    return create(req, res);
+  } else if (req.method === 'GET') {
+    return retrieve(req, res);
+  } else {
+    return methodNotAllowed(req, res);
+  }
+}
+
+function create (req, res) {
+  redisClient.incr(redisPrefix + 'index', function (err, reply) {
+    if (err) {
+      return internalError(err, req, res);
+    }
+
+    var form = new formidable.IncomingForm();
+
+    form.parse(req, function(err, fields, files) {
+      if (err) {
+        return internalError(err, req, res);
+      }
+
+      var uri = fields.uri;
+      // TODO check uri(?)
+      var shortUri = '/' + reply;
+      var key = redisPrefix + shortUri;
+
+      redisClient.set(key, uri, function (error) {
+        if (error) {
+          return internalError(err, req, res);
+        }
+
+        res.writeHead(200, { 'content-type': 'text/plain' });
+        return res.end(shortUri + '\r\n');
+      });
+    });
+  });
+}
+
+function retrieve (req, res) {
+  var key = redisPrefix + req.url;
+  redisClient.get(key, function (error, reply) {
+    if (error) {
+      return internalError(err, req, res);
+    }
+    
+    if (typeof reply !== 'string') {
+      res.writeHead(404, { 'content-type': 'text/plain' });
+      return res.end('not found\r\n');
+    }
+
+    res.writeHead(200, { 'content-type': 'text/plain' });
+    return res.end(reply + '\r\n');
+  });
+}
+
+function methodNotAllowed (req, res) {
+  res.writeHead(405, { 'content-type': 'text/plain' });
+  return res.end('method not allowed\r\n');
+}
+function internalError (error, req, res) {
+  res.writeHead(500, { 'content-type': 'text/plain' });
+  return res.end(error.message + '\r\n');
+}
diff --git a/go/package.json b/go/package.json
new file mode 100644
index 00000000..4656b992
--- /dev/null
+++ b/go/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "go",
+  "version": "0.0.0",
+  "description": "minimalistic uri shortener",
+  "dependencies": {
+    "formidable": "*",
+    "redis": "*"
+  }
+}