Additionally, the following open community servers are polled:
Additionally, a few other servers are hardcoded, see [querying logic](php/fetch-servers.php).
- https://open.getsession.org
- http://13.233.251.36:8081
### How does this work?
### Steps
The [`update-listing.php`](php/update-listing.php) script invokes the following two PHP scripts: [`fetch-servers.php`](php/fetch-servers.php) to query available servers, and [`generate-html.php`](php/generate-html.php>) to generate the static HTML.
`extract_join_links_from_html()` and `get_servers_from_join_links()`
1. Making sure servers are online: `reduce_servers()`
1. Querying the servers for all available rooms
and normalize active user numbers: `query_servers_for_rooms()`
1. De-duplicating servers based on public keys:
1. Querying the servers for all available rooms
and normalizing active user numbers: `query_servers_for_rooms()`
1. De-duplicating servers based on public keys:
`get_pubkeys_of_servers()` and `reduce_addresses_of_pubkeys()`
1. Aggregating all server info & adding language data: `generate_info_arrays()`
1. Generating static HTML content: `generateHTML()`
### Legacy support
Right now we fully support legacy SOGS servers,
although this support is likely going to be dropped soon,
since those servers can not even be joined anymore with current Session clients.
Dropping legacy support will also increase maintainability.
Static HTML is generated from the [`sites`](sites) directory to the [`output`](output) directory, which additionally contains static assets. All contents of `sites` are invoked to produce a HTML page unless they are prefixed with a `+` sign.
### Work around bad routing to Chinese servers
Depending on your location, it is possible for you to get really bad routing to
SOGS servers behind the GFW. In this case,
the initial connection is still successful, but you'll never receive
any actual content and the retrieval attempt will simply time out.
Depending on your location, it is possible for you to get really bad routing to
SOGS servers behind the [GFW](https://en.wikipedia.org/wiki/Great_Firewall). In this case,
the initial connection is still successful, but you'll never receive
any actual content and the retrieval attempt will simply time out.
This happens randomly. To make sure this won't affect the results, we simply
check whether the server is online (the initial connection being successful),
and then retry a lot of times with a short timeout
until we eventually get the content.
check whether the server is online (the initial connection being successful),
and then retry a lot of times with a short timeout
