favicon

Author: waralex

Project.toml

@@ -33,8 +33,8 @@ JSON = "0.21"
 JSON2 = "0.3"
 MD5 = "0.2"
 PlotlyBase = "0.8.5, 0.8.6"
-julia = "1.3"
 YAML = "0.4.7"
+julia = "1.3"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"

src/favicon.ico

@@ -1,10 +1,10 @@
-function resource_url(app::DashApp, resource::AppRelativeResource) 
+function resource_url(app::DashApp, resource::AppRelativeResource)
     prefix = get_setting(app, :requests_pathname_prefix)
     return string(prefix,
          "_dash-component-suites/",
          resource.namespace,
          "/",
-         build_fingerprint(resource.relative_path, resource.version, resource.ts) 
+         build_fingerprint(resource.relative_path, resource.version, resource.ts)
      )
 end
 
@@ -19,7 +19,7 @@ function asset_path(app::DashApp, path::AbstractString)
 end
 
 resource_url(app::DashApp, resource::AppExternalResource) = resource.url
-function resource_url(app::DashApp, resource::AppAssetResource) 
+function resource_url(app::DashApp, resource::AppAssetResource)
     return string(
         asset_path(app, resource.path),
         "?m=", resource.ts
@@ -42,7 +42,7 @@ function metas_html(app::DashApp)
         get(tag, "http-equiv", "") == "X-UA-Compatible"
     end
     has_charset = any(tag -> haskey(tag, "charset"), meta_tags)
-    
+
     result = String[]
     !has_ie_compat && push!(result, "<meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">")
     !has_charset && push!(result, "<meta charset=\"UTF-8\">")
@@ -52,7 +52,7 @@ function metas_html(app::DashApp)
 
 end
 
-function css_html(app::DashApp, resources::ApplicationResources) 
+function css_html(app::DashApp, resources::ApplicationResources)
      join(
          make_css_tag.(Ref(app), resources.css), "\n       "
          )
@@ -77,7 +77,7 @@ app_entry_html() = """
 </div>
 """
 
-function config_html(app::DashApp) 
+function config_html(app::DashApp)
     config = Dict{Symbol, Any}(
         :url_base_pathname => get_setting(app, :url_base_pathname),
         :requests_pathname_prefix => get_setting(app, :requests_pathname_prefix),
@@ -94,20 +94,35 @@ function config_html(app::DashApp)
         )
     end
     return """<script id="_dash-config" type="application/json">$(JSON2.write(config))</script>"""
-end 
+end
 
 
 renderer_html() = """<script id="_dash-renderer" type="application/javascript">var renderer = new DashRenderer();</script>"""
 
-favicon_html(app::DashApp) = "" 
+function favicon_html(app::DashApp, resources::ApplicationResources)
+    favicon_url = if !isnothing(resources.favicon)
+        asset_path(app, resources.favicon.path)
+    else
+        "$(get_setting(app, :requests_pathname_prefix))_favicon.ico?v=$(build_info().dash_version)"
+    end
+    return format_tag(
+        "link",
+        Dict(
+            "rel" => "icon",
+            "type" => "image/x-icon",
+            "href" => favicon_url
+        ),
+        opened = true
+        )
+end
+
 
+function index_page(app::DashApp, resources::ApplicationResources)
 
-function index_page(app::DashApp, resources::ApplicationResources)    
-    
     result = interpolate_string(app.index_string,
         metas = metas_html(app),
         title = app.title,
-        favicon = favicon_html(app),
+        favicon = favicon_html(app, resources),
         css = css_html(app, resources),
         app_entry = app_entry_html(),
         config = config_html(app),
@@ -121,7 +136,7 @@ function index_page(app::DashApp, resources::ApplicationResources)
             "#_dash_config" => r"id=\"_dash-config\"",
             "dash-renderer" => r"src=\"[^\"]*dash[-_]renderer[^\"]*\"",
             "new DashRenderer" => r"id=\"_dash-renderer",
-        ] 
+        ]
     )
     return result
 end

src/handler/index_page.jl

@@ -5,6 +5,7 @@ include("processors/index.jl")
 include("processors/layout.jl")
 include("processors/reload_hash.jl")
 include("processors/resource.jl")
+include("processors/default_favicon.jl")
 
 function start_reload_poll(state::HandlerState)
     folders = Set{String}()
@@ -124,6 +125,7 @@ function make_handler(app::DashApp, registry::ResourcesRegistry; check_layout =
     add_route!(process_layout, router, "$(prefix)_dash-layout")
     add_route!(process_dependencies, router, "$(prefix)_dash-dependencies")
     add_route!(process_reload_hash, router, "$(prefix)_reload-hash")
+    add_route!(process_default_favicon, router, "$(prefix)_favicon.ico")
     add_route!(process_resource, router, "$(prefix)_dash-component-suites/<namespace>/<path>")
     add_route!(process_assets, router, "$(prefix)$(assets_url_path)/<file_path>")
     add_route!(process_callback, router, "POST", "$(prefix)_dash-update-component")

src/handler/make_handler.jl

@@ -0,0 +1,10 @@
+function process_default_favicon(request::HTTP.Request, state::HandlerState)
+    ico_contents = read(
+        joinpath(ROOT_PATH, "src", "favicon.ico")
+    )
+    return HTTP.Response(
+        200,
+        ["Content-Type" => "image/x-icon"],
+        body = ico_contents
+        )
+end

src/handler/processors/default_favicon.jl

@@ -27,22 +27,22 @@ struct ApplicationResources
     files ::Dict{String, NamespaceFiles}
     css ::Vector{AppResource}
     js ::Vector{AppResource}
-    favicon ::Union{Nothing, String}
+    favicon ::Union{Nothing, AppAssetResource}
     ApplicationResources(files, css, js, favicon) = new(files, css, js, favicon)
 end
 
 
 function ApplicationResources(app::DashApp, registry::ResourcesRegistry)
     css = AppResource[]
     js = AppResource[]
-    favicon::Union{Nothing, String} = nothing
+    favicon::Union{Nothing, AppResource} = nothing
     files = Dict{String, NamespaceFiles}()
-    
+
     serve_locally = get_setting(app, :serve_locally)
     assets_external_path = get_setting(app, :assets_external_path)
     dev = get_devsetting(app, :serve_dev_bundles)
     eager_loading = get_setting(app, :eager_loading)
-    
+
     append_pkg = function(pkg)
         append!(css,
             _convert_resource_pkg(pkg, :css, dev = dev, serve_locally = serve_locally, eager_loading = eager_loading)
@@ -58,10 +58,10 @@ function ApplicationResources(app::DashApp, registry::ResourcesRegistry)
 
     append_pkg(get_dash_dependencies(registry, get_devsetting(app, :props_check)))
 
-    append!(css, 
+    append!(css,
         _convert_external.(get_setting(app, :external_stylesheets))
     )
-    append!(js, 
+    append!(js,
         _convert_external.(get_setting(app, :external_scripts))
     )
 
@@ -72,7 +72,7 @@ function ApplicationResources(app::DashApp, registry::ResourcesRegistry)
             elseif type == :css
                 push!(css, asset_resource(url, modified))
             elseif type == :favicon
-                favicon = url
+                favicon = AppAssetResource(url, modified)
             end
         end
     end
@@ -113,7 +113,7 @@ function walk_assets(callback, app::DashApp)
     assets_filter = isempty(assets_ignore) ?
         (f) -> true :
         (f) -> !occursin(assets_regex, f)
-        
+
     assets_path = get_assets_path(app)
     if get_setting(app, :include_assets_files) && isdir(assets_path)
         for (base, dirs, files) in walkdir(assets_path)
@@ -181,9 +181,9 @@ function _convert_resource_pkg(pkg::ResourcePkg, type::Symbol; dev, serve_locall
     ts = ispath(pkg.path) ? trunc(Int64, stat(pkg.path).mtime) : 0
     for resource in iterator
         append!(
-            result, 
+            result,
             _convert_resource(
-                    resource, 
+                    resource,
                     namespace = pkg.namespace,
                     version = pkg.version,
                     ts = ts,