view mod_webpresence/mod_webpresence.lua @ 4976:75b6e5df65f9

various: Improve error reporting if missing file server module on 0.12 If there is some error loading net.http.files then it would be swallowed by the pcall and then it would proceed to trying mod_http_files, which might cause unexpected behavior on 0.12 Ref #1765
author Kim Alvefur <zash@zash.se>
date Mon, 18 Jul 2022 22:47:54 +0200
parents 1903add39b7c
children
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module:depends("http");

local jid_split = require "util.jid".prepped_split;
local b64 = require "util.encodings".base64.encode;
local sha1 = require "util.hashes".sha1;
local stanza = require "util.stanza".stanza;
local json = require "util.json".encode_ordered;

local function require_resource(name)
    local icon_path = module:get_option_string("presence_icons", "icons");
    local f, err  = module:load_resource(icon_path.."/"..name);
    if f then
        return f:read("*a");
    end
    module:log("warn", "Failed to open image file %s", icon_path..name);
    return "";
end

local statuses = { online = {}, away = {}, xa = {}, dnd = {}, chat = {}, offline = {} };

local function handle_request(event, path)
  local status, message;
  local jid, type = path:match("([^/]+)/?(.*)$");
  if jid then
    local user, host = jid_split(jid);
    if host and not user then
        user, host = host, event.request.headers.host;
        if host then host = host:gsub(":%d+$", ""); end
    end
    if user and host then
      local user_sessions = hosts[host] and hosts[host].sessions[user];
      if user_sessions and user_sessions.top_resources then
        status = user_sessions.top_resources[1];
        if status and status.presence then
          message = status.presence:child_with_name("status");
          status = status.presence:child_with_name("show");
          if not status then
            status = "online";
          else
            status = status:get_text();
          end
          if message then
            message = message:get_text();
          end
        end
      end
    end
  end
  status = status or "offline";

  statuses[status].image = function()
    return { status_code = 200, headers = { content_type = "image/png" },
      body =  require_resource("status_"..status..".png")
    };
  end;
  statuses[status].html = function()
    local jid_hash = sha1(jid, true);
    return { status_code = 200, headers = { content_type = "text/html" },
      body =  [[<!DOCTYPE html>]]..
        tostring(
          stanza("html")
            :tag("head")
            :tag("title"):text("XMPP Status Page for "..jid):up():up()
            :tag("body")
            :tag("div", { id = jid_hash.."_status", class = "xmpp_status" })
            :tag("img", { id = jid_hash.."_img", class = "xmpp_status_image xmpp_status_"..status,
              src = "data:image/png;base64,"..b64(require_resource("status_"..status..".png")) }):up()
            :tag("span", { id = jid_hash.."_status_name", class = "xmpp_status_name" })
              :text("\194\160"..status):up()
            :tag("span", { id = jid_hash.."_status_message", class = "xmpp_status_message" })
              :text(message and "\194\160"..message.."" or "")
        )
    };
  end;
  statuses[status].text = function()
    return { status_code = 200, headers = { content_type = "text/plain" },
      body = status
    };
  end;
  statuses[status].message = function()
    return { status_code = 200, headers = { content_type = "text/plain" },
      body = (message and message or "")
    };
  end;
  statuses[status].json = function()
    return { status_code = 200, headers = { content_type = "application/json" },
      body = json({
        jid    = jid,
        show   = status,
        status = (message and message or "null")
      })
    };
  end;
  statuses[status].xml = function()
    return { status_code = 200, headers = { content_type = "application/xml" },
      body = [[<?xml version="1.0" encoding="utf-8"?>]]..
        tostring(
          stanza("result")
            :tag("jid"):text(jid):up()
            :tag("show"):text(status):up()
            :tag("status"):text(message)
        )
      };
  end

  if ((type == "") or (not statuses[status][type])) then
    type = "image"
  end;

  return statuses[status][type]();
end

module:provides("http", {
    default_path = "/status";
    route = {
        ["GET /*"] = handle_request;
    };
});