pulsebert: double-proxy the espCam

hosts/pulsebert/configuration.nix

@@ -6,6 +6,7 @@
 
 let
   octoprintPort = 8080;
+  espCam = "http://172.20.78.164:81";
 in
 {
   imports = [ # Include the results of the hardware scan.
@@ -148,6 +149,14 @@ in
             client_max_body_size 200M;
           '';
         };
+        locations."/cam/stream" = {
+          proxyPass = "http://localhost:8081/video.mjpg";
+          extraConfig = "proxy_pass_request_headers off;";
+        };
+        locations."/cam/capture" = {
+          proxyPass = "${espCam}/capture";
+          extraConfig = "proxy_pass_request_headers off;";
+        };
       };
     };
   };
@@ -181,10 +190,20 @@ in
   # Allow access to printer serial port and GPIO
   users.users.${config.services.octoprint.user}.extraGroups = [ "dialout" "gpio" ];
 
-  # services.mjpg-streamer = {
-  #   enable = true;
-  #   inputPlugin = "input_uvc.so -r 1280x720";
-  # };
+  systemd.services.mjpeg-stream =
+    let
+      httpbounder = pkgs.callPackage <lib/pkgs/httpbounder.nix> {};
+    in {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      serviceConfig = {
+        User = "nobody";
+        Group = "nogroup";
+        Restart = "always";
+        RestartSec = 60;
+      };
+      script = "exec ${httpbounder}/bin/httpbounder -b 127.0.0.1:8081 -i ${espCam}/stream";
+    };
 
   # Allow gpio group to access GPIO devices
   users.groups.gpio = { };

lib/pkgs/httpbounder.nix

@@ -0,0 +1,18 @@
+{ fetchFromGitHub, rustPlatform, pkg-config, openssl }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "httpbounder";
+  version = "unstable-2020-10-23";
+
+  src = fetchFromGitHub {
+    owner = "Szperak";
+    repo = "httpbounder";
+    rev = "540d8e8beea5b75c2761ab3500464f1ebdebbc4f";
+    sha256 = "0m0q3835055xr2pq6726f9pp9ws1q6mwhfmgkylsagzzkrcpmnar";
+  };
+  cargoPatches = [ ./httpbounder.patch ];
+
+  cargoSha256 = "137zl2d2pr5p4zr6a8rrbc52izz25yh6cgilvag4fvnhgwv986c0";
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ openssl ];
+}