builds url discovery (#334)

- Feature: Added `--host` option to use Jupiters list of cloud host and zen servers to resolve best hosts
- Feature: Use local zenserver as builds cache if it has the `builds` service enabled and `--cloud-discovery-host` is provided and no remote zenserver cache hosts can be found
- Improvement: Added `--override-host` option as a replacement for `--url` (`--url` still works, but `--override-host` is preferred)

1 files changed, 18 insertions, 3 deletions

diff --git a/src/zenserver/workspaces/httpworkspaces.cpp b/src/zenserver/workspaces/httpworkspaces.cpp
index ac0aaef8e..7ef84743e 100644
--- a/src/zenserver/workspaces/httpworkspaces.cpp
+++ b/src/zenserver/workspaces/httpworkspaces.cpp
@@ -73,8 +73,12 @@ namespace {
 
 }  // namespace
 
-HttpWorkspacesService::HttpWorkspacesService(HttpStatsService& StatsService, const WorkspacesServeConfig& Cfg, Workspaces& Workspaces)
+HttpWorkspacesService::HttpWorkspacesService(HttpStatusService&			  StatusService,
+											 HttpStatsService&			  StatsService,
+											 const WorkspacesServeConfig& Cfg,
+											 Workspaces&				  Workspaces)
 : m_Log(logging::Get("workspaces"))
+, m_StatusService(StatusService)
 , m_StatsService(StatsService)
 , m_Config(Cfg)
 , m_Workspaces(Workspaces)
@@ -85,6 +89,7 @@ HttpWorkspacesService::HttpWorkspacesService(HttpStatsService& StatsService, con
 HttpWorkspacesService::~HttpWorkspacesService()
 {
 	m_StatsService.UnregisterHandler("ws", *this);
+	m_StatusService.UnregisterHandler("ws", *this);
 }
 
 const char*
@@ -149,14 +154,21 @@ HttpWorkspacesService::HandleStatsRequest(HttpServerRequest& HttpReq)
 }
 
 void
+HttpWorkspacesService::HandleStatusRequest(HttpServerRequest& Request)
+{
+	ZEN_TRACE_CPU("HttpWorkspacesService::Status");
+	CbObjectWriter Cbo;
+	Cbo << "ok" << true;
+	Request.WriteResponse(HttpResponseCode::OK, Cbo.Save());
+}
+
+void
 HttpWorkspacesService::Initialize()
 {
 	using namespace std::literals;
 
 	ZEN_LOG_INFO(LogFs, "Initializing Workspaces Service");
 
-	m_StatsService.RegisterHandler("ws", *this);
-
 	m_Router.AddPattern("workspace_id", "([[:xdigit:]]{24})");
 	m_Router.AddPattern("share_id", "([[:xdigit:]]{24})");
 	m_Router.AddPattern("chunk", "([[:xdigit:]]{24})");
@@ -238,6 +250,9 @@ HttpWorkspacesService::Initialize()
 		HttpVerb::kGet);
 
 	RefreshState();
+
+	m_StatsService.RegisterHandler("ws", *this);
+	m_StatusService.RegisterHandler("ws", *this);
 }
 
 std::filesystem::path