updated readme

README.md

@@ -10,9 +10,11 @@
 ### Installation ###
 
 First of all, you need to create component listener on your Jabber server. 
-For example, for ejabberd:
+For example, for ejabberd in **/etc/ejabberd/ejabberd.yml**:
 
 ```
+listen:  
+  -  
     port: 8888  
     module: ejabberd_service  
     access: all  
@@ -38,4 +40,72 @@ xmpp:
 	loglevel: 0   
 ```
 
-If neccessary, edit **telegram** section too. 
+### Configuration ###
+
+Feel free to edit **config.yml**, options are commented and with clear names.
+It is good idea to obtain Telegram API ID from [my.telegram.org](https://my.telegram.org) to remove demo key requests limit.
+
+### How to receive files from Telegram ###
+
+First of all, you need to set up web server that will serve some directory in your filesystem.
+Example nginx config: 
+
+```
+server {
+	listen 80;
+	server_name tlgrm.localhost;
+	location /content {
+		alias /var/zhabogram;
+	}
+}
+```
+
+You need to set `content_path` and `content_link` in **config.yml**.  
+  
+Set `content_path` according to location (for our example it will be `/var/zhabogram/content`).  
+Set `content_link` according to server_name (for our example it will be `http://tlgrm.localhost`)  
+
+
+### How to send files to Telegram chats ###
+
+You need to setup `mod_http_upload` for your XMPP server.  
+For example, for ejabberd in **/etc/ejabberd/ejabberd.yml**
+
+```
+modules:
+  mod_http_upload:
+    docroot: "/var/ejabberd/upload" # this must be a valid path, user ownership and SELinux flags must be set accordingly
+    put_url: "https://xmpp.localhost:5443/upload/@HOST@"
+    get_url: "https://xmppfiles.localhost/upload/@HOST@"
+    access: local
+    max_size: 500000000 #500 MByte
+    thumbnail: false
+    file_mode: "0644"
+    dir_mode: "0744"
+```
+
+Then you need to setup nginx proxy that will serve `get_url` path, because Telegram do not allowing URLs with non-default ports.  
+Example nginx config:  
+
+```
+server {
+	listen 80;
+	listen 443 ssl;
+
+	server_name xmppfiles.localhost;
+
+        # SSL settigns #
+        keepalive_timeout   60;
+        ssl_certificate      /etc/ssl/domain.crt;
+        ssl_certificate_key  /etc/ssl/domain.key;
+        ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
+        ssl_ciphers  "RC4:HIGH:!aNULL:!MD5:!kEDH";
+        add_header Strict-Transport-Security 'max-age=604800';
+
+        location / {
+            proxy_pass https://xmpp.localhost:5443;
+        }	
+
+}
+
+```

config.yml.example

@@ -1,21 +1,22 @@
 telegram:
 
-    api_id: '17349'
-    api_hash: '344583e45741c457fe1862106095a5eb'
-    verbosity: 2
-    useragent: 'Zhabogram XMPP Gateway'
-    version: '0.7'
-    use_test_dc: false
-    loglevel: 0
-    content_path: '/var/www/tg_media'
-    content_link: 'https://localhost/tg_media'
-    content_upload_prefix: 'https://localhost/upload'
+    api_id: '17349' # telegram API ID (my.telegram.org) #
+    api_hash: '344583e45741c457fe1862106095a5eb' # telegram API HASH (my.telegram.org) #
+    verbosity: 2 # 1 = no verbosity, 2 = moderate verbosity, 3 = network requests debug
+    useragent: 'Zhabogram XMPP Gateway' # client name 
+    version: '0.8' # client version 
+    use_test_dc: false # always use false
+    loglevel: 0  # 0 = debug, 1 = info, 2 = warn, 3 = err, 4 = fatal, 5 = unknown (ruby logger class)
+    content_path: '/var/www/tg_media' # we will move (symlink) downloaded content here — you must setup web server that serve this directry
+    content_link: 'https://localhost/tg_media' # web server that serve `content_path` internet address  
+    content_upload_prefix: 'https://localhost/upload' # we will send files with URL starting with this string as document to Telegram (mod_http_upload get_url, see readme)
     
 xmpp:
 
-    db_path: 'users.db'
-    jid: 'tlgrm.localhost'
-    host: 'localhost'
-    port: 8899
-    secret: 'password'
-    loglevel: 0 
+    db_path: 'users.db' # sqlite3 users (JID:Telegram Login) database 
+    jid: 'tlgrm.localhost' # component JID 
+    host: 'localhost' # XMPP server 
+    port: 8899 # component port
+    secret: 'password' # component auth secret 
+    loglevel: 0  # 0 = debug, 1 = info, 2 = warn, 3 = err, 4 = fatal, 5 = unknown (ruby logger class)
+