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Usage\n\n### Grouping of HTTP handlers\n\nCreate a Go module that contains a resuable group of HTTP handlers. For example,\na group of HTTP handlers that provides health checking and the application's version over HTTP:\n\n```go\npackage httpstat // import \"example.org/httpstat\"\"\n\nimport (\n    \"encoding/json\"\n    \"net/http\"\n)\n\ntype Handler struct {\n    version string\n}\n\nfunc NewHandler(version string) *Handler {\n    return \u0026Handler{version: version}\n}\n\nfunc (h *Handler) AddRoutes(apply func(m, p string, h http.Handler, mws ...func(http.Handler) http.Handler)) {\n    apply(http.MethodGet, \"/health/alive\", newHealthHandler())\n    apply(http.MethodGet, \"/health/ready\", newHealthHandler())\n    apply(http.MethodGet, \"/version\", newVersionHandler(h.version))\n}\n\nfunc newHealthHandler() http.Handler {\n    return http.HandlerFunc(w http.ResponseWriter, r *http.Request) {\n        r.WriteHeader(http.StatusOK)\n    }\n}\n\nfunc newVersionHandler(version string) http.Handler {\n    return http.HandlerFunc(w http.ResponseWriter, r *http.Request) {\n        fmt.Fprint(w, version)\n    }\n}\n```\n\nNow we can use this module in our applications using the routegroup router:\n\n```go\npackage main\n\nimport (\n    \"fmt\"\n    \"net/http\"\n\n    \"example.org/httpstat\"\n    \"github.com/i-core/routegroup\"\n)\n\nvar version = \"\u003cAPP_VERSION\u003e\"\n\nfunc main() {\n    router := routegroup.NewRouter()\n    router.AddRoutes(httpstat.NewHandler(version), \"/stat\")\n\n    // Start a web server.\n    fmt.Println(\"Server started\")\n    log.Printf(\"Server finished; error: %s\\n\", http.ListenAndServe(\":8080\", router))\n}\n```\n\n### Common middlewares\n\nIn some cases, you may need to use some middlewares for all routes in an application.\nTo do it you should specify the middlewares as arguments in the router's constructor.\n\nFor example, we add a logging middleware to the router in the example above:\n\n```go\npackage main\n\nimport (\n    \"fmt\"\n    \"net/http\"\n\n    \"example.org/httpstat\"\n    \"github.com/i-core/routegroup\"\n)\n\nvar version = \"\u003cAPP_VERSION\u003e\"\n\nfunc main() {\n    router := routegroup.NewRouter(logw)\n    router.AddRoutes(httpstat.NewHandler(version), \"/stat\")\n\n    // Start a web server.\n    fmt.Println(\"Server started\")\n    log.Printf(\"Server finished; error: %s\\n\", http.ListenAndServe(\":8080\", router))\n}\n\nfunc logw(h http.Handler) http.Handler {\n    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {\n        fmt.Printf(\"Incomming request %s %s\\n\", r.Method, r. URL)\n        h.ServeHTTP(w, r)\n    })\n}\n```\n\n### Path parameters\n\nThe routegroup router support path parameters.\nPath parameters are defined in the format `:param_name`, for example, `/employee/:id`.\nroutegroup provides the function `routegroup.PathParam` to get a value of a path parameter by a name:\n\n```go\npackage api\n\nimport (\n    \"encoding/json\"\n    \"net/http\"\n\n    \"github.com/i-core/routegroup\"\n)\n\ntype Handler struct {}\n\nfunc NewHandler() *Handler {\n    return \u0026Handler{}\n}\n\nfunc (h *Handler) AddRoutes(apply func(m, p string, h http.Handler, mws ...func(http.Handler) http.Handler)) {\n    // Register a route with a path parameter.\n    apply(http.MethodGet, \"/employee/:id\", newEmployeeHandler())\n}\n\nfunc newEmployeeHandler() http.Handler {\n    return http.HandlerFunc(w http.ResponseWriter, r *http.Request) {\n        // Get a value of the path parameter registered above.\n        empId := routegroup.PathParam(r.Context(), \"id\")\n        var emp map[string]interface{}\n\n        // Load employee's data from the DB...\n\n        w.Header().Set(\"Content-Type\", \"application/json\")\n        if err := json.NewEncoder(w).Encode(emp); err != nil {\n            panic(err)\n        }\n    }\n}\n```\n\n## Implementation\n\nroutegroup uses [github.com/julienschmidt/httprouter](https://github.com/julienschmidt/httprouter) as an HTTP router.\n\n## Contributing\n\nThanks for your interest in contributing to this project.\nGet started with our [Contributing Guide][contrib].\n\n## License\n\nThe code in this project is licensed under [MIT license][license].\n\n[doc-img]: https://godoc.org/github.com/i-core/routegroup?status.svg\n[doc]: https://godoc.org/github.com/i-core/routegroup\n\n[build-img]: https://travis-ci.com/i-core/routegroup.svg?branch=master\n[build]: https://travis-ci.com/i-core/routegroup\n\n[contrib]: https://github.com/i-core/.github/blob/master/CONTRIBUTING.md\n[license]: LICENSE","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fi-core%2Froutegroup","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fi-core%2Froutegroup","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fi-core%2Froutegroup/lists"}