add license and readme.

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Kacper Szurek
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,33 @@
+# SwaggerHelper
+
+SwaggerHelper是用于启动本地保存的api-docs.json文档，例如在对系统进行**二次**渗透测试时,若目标关闭了Swagger-UI，则可使用本工具在本地启动接口文档（前提是api-docs文档已离线保存在本地），直接调用目标接口。
+
+# 编译
+
+> 编译该工具需要go 1.16或更高版本
+
+`$ go build`
+
+# 使用方法
+
+```
+usage: SwaggerHelper [-h|--help] [-L|--listen "<value>"] -F|--apifile "<value>"
+                     [-S|--serverroot "<value>"]
+
+Arguments:
+
+  -h  --help        Print help information
+  -L  --listen      bind address.. Default: 127.0.0.1:1323
+  -F  --apifile     swagger-ui api-docs file path.
+  -S  --serverroot  server override.. Default:
+
+```
+
+若不需要覆盖api-docs内部的host和bashPath，直接执行如下命令：
+
+`SwaggerHelper -F /to/path/api-docs.json`
+
+若因为CORS限制或服务器地址更改需要另外指定API根路径的，执行如下命令：
+
+`SwaggerHelper -F /to/path/api-docs.json -S http://1.2.3.4/api`
+

swaggerhelper.go

@@ -27,42 +27,59 @@ func getSwaggerUIFiles() http.FileSystem {
 	return http.FS(fsys)
 }
 
+const (
+	banner = `
+
+	╔══╗─────────────╔╗╔╗
+	║══╬╦╦╦═╗╔═╦═╦═╦╦╣╚╝╠═╦╗╔═╦═╦╦╗
+	╠══║║║║╬╚╣╬║╬║╩╣╔╣╔╗║╩╣╚╣╬║╩╣╔╝
+	╚══╩══╩══╬╗╠╗╠═╩╝╚╝╚╩═╩═╣╔╩═╩╝
+	─────────╚═╩═╝──────────╚╝
+`
+)
+
 func main() {
 	parser := argparse.NewParser("SwaggerHelper", "")
 	var listenAddress *string = parser.String("L", "listen", &argparse.Options{Required: false, Default: "127.0.0.1:1323", Help: "bind address."})
 	var swaggerPath *string = parser.String("F", "apifile", &argparse.Options{Required: true, Help: "swagger-ui api-docs file path."})
 	var serverRoot *string = parser.String("S", "serverroot", &argparse.Options{Required: false, Default: "", Help: "server override."})
 	err := parser.Parse(os.Args)
 	exit_on_error("[PARSER ERROR]", err)
-
+	useServerOverride := *serverRoot != ""
 	e := echo.New()
+	e.HideBanner = true
 	e.GET("/swagger.json", func(c echo.Context) error {
 		data := getContent(*swaggerPath)
-		result, _ := jsonparser.Set(data, []byte("\"\""), "host")
-		final, _ := jsonparser.Set(result, []byte("\"/backend-api\""), "basePath")
-		return c.JSONBlob(http.StatusOK, final)
+		if useServerOverride {
+			result, _ := jsonparser.Set(data, []byte("\"\""), "host")
+			final, _ := jsonparser.Set(result, []byte("\"/backend-api\""), "basePath")
+			return c.JSONBlob(http.StatusOK, final)
+		}
+		return c.JSONBlob(http.StatusOK, data)
 	})
-
-	backend, err := url.Parse(*serverRoot)
-	if err != nil {
-		e.Logger.Fatal(err)
-	}
-	targets := []*middleware.ProxyTarget{
-		{
-			URL: backend,
+	if useServerOverride {
+		backend, err := url.Parse(*serverRoot)
+		if err != nil {
+			e.Logger.Fatal(err)
+		}
+		targets := []*middleware.ProxyTarget{
+			{
+				URL: backend,
+			},
+		}
+		proxyBackend := e.Group("/backend-api")
+		proxyBackend.Use(middleware.ProxyWithConfig(middleware.ProxyConfig{
+			Balancer: middleware.NewRoundRobinBalancer(targets),
+			Rewrite: map[string]string{
+				"^/backend-api/*": "/$1",
+			},
 		},
+		))
 	}
-	proxyBackend := e.Group("/backend-api")
-	proxyBackend.Use(middleware.ProxyWithConfig(middleware.ProxyConfig{
-		Balancer: middleware.NewRoundRobinBalancer(targets),
-		Rewrite: map[string]string{
-			"^/backend-api/*": "/$1",
-		},
-	},
-	))
 
 	assetHandler := http.FileServer(getSwaggerUIFiles())
 	e.GET("/*", echo.WrapHandler(assetHandler))
+	println(banner)
 	e.Logger.Fatal(e.Start(*listenAddress))
 }