Refactor swagger config (#169)

Refactor existing swagger config. New config gives users accesss to
advanced configuration options of Swagger UI. Newly added options
include every **docker variable** compatible parameter from 
https://github.com/swagger-api/swagger-ui/blob/master/docs/usage/configuration.md.

utoipa-swagger-ui/Cargo.toml

@@ -24,6 +24,9 @@ utoipa = { version = "1", path = "..", default-features = false, features = [] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = { version = "1.0" }
 
+[dev-dependencies]
+similar = "2.1"
+
 [package.metadata.docs.rs]
 features = ["actix-web", "rocket"]
 

utoipa-swagger-ui/build.rs

@@ -42,7 +42,7 @@ fn main() {
     let mut zip = ZipArchive::new(swagger_ui_zip).unwrap();
     extract_within_path(&mut zip, [SWAGGER_UI_DIST_ZIP, "dist"], &target_dir).unwrap();
 
-    replace_default_url(&target_dir);
+    replace_default_url_with_config(&target_dir);
 }
 
 fn extract_within_path<const N: usize>(
@@ -91,9 +91,9 @@ fn extract_within_path<const N: usize>(
     Ok(())
 }
 
-fn replace_default_url(target_dir: &str) {
+fn replace_default_url_with_config(target_dir: &str) {
     lazy_static! {
-        static ref RE: Regex = Regex::new(r#"url: ".*","#).unwrap();
+        static ref RE: Regex = Regex::new(r#"(?ms)url:.*deep.*true,"#).unwrap();
     }
 
     let path = [
@@ -107,7 +107,7 @@ fn replace_default_url(target_dir: &str) {
 
     let swagger_initializer = fs::read_to_string(&path).unwrap();
 
-    let replaced_swagger_initializer = RE.replace(&swagger_initializer, "{{urls}},");
+    let replaced_swagger_initializer = RE.replace(&swagger_initializer, "{{config}},");
 
     fs::write(&path, replaced_swagger_initializer.as_ref()).unwrap();
 }

utoipa-swagger-ui/src/actix.rs

@@ -23,9 +23,11 @@ impl HttpServiceFactory for SwaggerUi {
 
         let swagger_resource = Resource::new(self.path.as_ref())
             .guard(Get())
-            .app_data(Data::new(Config {
-                urls,
-                oauth: self.oauth,
+            .app_data(Data::new(if let Some(mut config) = self.config {
+                config.urls = urls;
+                config
+            } else {
+                Config::new(urls)
             }))
             .to(serve_swagger_ui);