Documentation: Document web_url and web_directory

documentation/admin.md

@@ -42,6 +42,7 @@ This is Admin documentation for Spectrum 2 transport. If you are user trying to
 * [MySQL Support](configuration/mysql.html)
 * [PostgreSQL Support](configuration/postgresql.html)
 * [Logging](configuration/logging.html)
+* [Web storage](configuration/web_storage.html);
 
 #### Management
 

documentation/backends/libpurple.md

@@ -39,6 +39,10 @@ prpl-skypeweb| [https://github.com/EionRobb/skype4pidgin/tree/master/skypeweb](w
 
 These plugins are included by default in our Docker image.
 
+### Support for Facebook stickers
+
+Facebook stickers are supported using [Web Storage](../configuration/web_storage.html).
+
 ### Setting libpurple plugins configurations
 
 Some libpurple protocol plugins allow setting configuration variables. Spectrum 2 passes every variable set in `purple` section to libpurple library. If you need to set such options, you can do it for example like this in your configuration file:

documentation/configuration/config_file.md

@@ -39,10 +39,13 @@ title: Spectrum 2
 > * [pidfile](#servicepidfile)
 > * [user](#serviceuser)
 > * [users_per_backend](#servicusersperbackend)
+> * [web_directory](#servicewebdirectory)
+> * [web_url](#serviceweburl)
 > * [working_dir](#serviceworkingdir)
 
 
 
+
 ### Types of configuration fields
 
 Following types are used:
@@ -376,6 +379,35 @@ get his own separated backend process.
 For bigger user-base, you have to increase the `service.users_per_backend` value, but there is no optimal value to be suggested yet.
 
 
+#### service.web_directory
+
+Key | val
+----|----
+Description:|Full path to directory used to save files to which the links are sent to users.
+Context:|server-mode and gateway-mode
+Type:|string
+Default:|
+
+When Spectrum 2 has some image or file for the user and this option is set, the image or file is stored in this directory and
+and link based on `service.web_url` is sent to the user so he can download the file.
+
+You can read more about this configuration on [Web Storage page](web_storage.html).
+
+#### service.web_url
+
+Key | val
+----|----
+Description:|URL on which files in `service.web_directory` are accessible.
+Context:|server-mode and gateway-mode
+Type:|string
+Default:|
+
+When Spectrum 2 has some image or file for the user and this option is set, the image or file is stored in the `service.web_directory` directory and
+and link based on `service.web_url` is sent to the user so he can download the file.
+
+You can read more about this configuration on [Web Storage page](web_storage.html).
+
+
 #### service.working_dir
 
 Key | val

documentation/configuration/web_storage.md

@@ -0,0 +1,13 @@
+---
+layout: page
+title: Spectrum 2
+---
+
+### Web Storage
+
+Web storage is used to send images and files received by Spectrum 2 to end user. When new image or file is downloaded from the 3rd-party network, it is stored into `service.web_directory` directory
+and the link to that file, based on `service.web_url`, is sent to the user.
+
+That means that you should configure the web-server on the machine where you run Spectrum 2 to serve `service.web_directory`.
+
+If you for example use httpd, you can configure `service.web_directory=/var/www/html/spectrum2`. In that case, the matching `service.web_url` value will be `service.web_url=http://domain.tld/spectrum2`.