go: setenv HOSTN to generate absolute uris

2 files changed, 17 insertions, 6 deletions

diff --git a/go/README b/go/README
index 78f6b195..17deb7d6 100644
--- a/go/README
+++ b/go/README
@@ -7,16 +7,18 @@ go - minimalistic uri shortener
     npm install hiredis
 
 # run service
-    PORT=1337 node .
+    HOSTN=go PORT=80 node .
+
+  if you omit `HOSTN`, then relative shortened uris will be generated.
 
 # add uri
-    curl -F uri=https://mywaytoolonguri http://localhost:1337
+    curl -F uri=https://mywaytoolonguri http://go
 
-  this will give you a relative shortened uri.
+  this will give you a shortened uri.
 
 # resolve uri
 
-  curl -L http://localhost:1337/shortened-relative-uri
+  curl -L http://go/1
 
 # clear database
 
diff --git a/go/index.js b/go/index.js
index 470010a9..95ddd2ef 100644
--- a/go/index.js
+++ b/go/index.js
@@ -1,5 +1,13 @@
+var hostname = process.env.HOSTN;
 var httpPort = process.env.PORT || 1337;
 var redisPrefix = 'go:';
+var uriPrefix = '';
+if (hostname) {
+  uriPrefix += 'http://' + hostname;
+  if (httpPort != 80) {
+    uriPrefix += ':' + httpPort;
+  }
+}
 
 var http = require('http');
 var formidable = require('formidable');
@@ -41,8 +49,9 @@ function create (req, res) {
 
       var uri = fields.uri;
       // TODO check uri(?)
-      var shortUri = '/' + reply;
-      var key = redisPrefix + shortUri;
+      var shortPath = '/' + reply;
+      var shortUri = uriPrefix + shortPath;
+      var key = redisPrefix + shortPath;
 
       redisClient.set(key, uri, function (error) {
         if (error) {