Esempio n. 1
0
// setupHandlerChain does plumbing for logging and such.
func setupHandlerChain(c *xhandler.Chain) {
	host, _ := os.Hostname()
	conf := xlog.Config{
		// Log info level and higher
		Level: xlog.LevelInfo,
		// Set some global env fields
		Fields: xlog.F{
			"role": "my-shitty-service",
			"host": host,
		},
		// Output everything on console
		Output: xlog.NewOutputChannel(xlog.NewConsoleOutput()),
	}

	// Add close notifier handler so context is cancelled when the client closes
	// the connection
	c.UseC(xhandler.CloseHandler)

	// Install the logger handler
	c.UseC(xlog.NewHandler(conf))

	// Add timeout handler (HAHA)
	//c.UseC(xhandler.TimeoutHandler(2 * time.Second))

	// Install some provided extra handler to set some request's context fields.
	// Thanks to those handler, all our logs will come with some pre-populated fields.
	c.UseC(xlog.MethodHandler("method"))
	c.UseC(xlog.URLHandler("url"))
	c.UseC(xlog.RemoteAddrHandler("ip"))
	c.UseC(xlog.UserAgentHandler("user_agent"))
	c.UseC(xlog.RefererHandler("referer"))
	c.UseC(xlog.RequestIDHandler("req_id", "Request-Id"))
}
Esempio n. 2
0
func Example_handler() {
	c := alice.New()

	host, _ := os.Hostname()
	conf := xlog.Config{
		// Set some global env fields
		Fields: xlog.F{
			"role": "my-service",
			"host": host,
		},
	}

	// Install the logger handler with default output on the console
	c.Append(xlog.NewHandler(conf))

	// Plug the xlog handler's input to Go's default logger
	log.SetFlags(0)
	log.SetOutput(xlog.New(conf))

	// Install some provided extra handler to set some request's context fields.
	// Thanks to those handler, all our logs will come with some pre-populated fields.
	c.Append(xlog.RemoteAddrHandler("ip"))
	c.Append(xlog.UserAgentHandler("user_agent"))
	c.Append(xlog.RefererHandler("referer"))
	c.Append(xlog.RequestIDHandler("req_id", "Request-Id"))

	// Here is your final handler
	h := c.Then(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		// Get the logger from the request's context. You can safely assume it
		// will be always there: if the handler is removed, xlog.FromContext
		// will return a NopLogger
		l := xlog.FromRequest(r)

		// Then log some errors
		if err := errors.New("some error from elsewhere"); err != nil {
			l.Errorf("Here is an error: %v", err)
		}

		// Or some info with fields
		l.Info("Something happend", xlog.F{
			"user":   "******",
			"status": "ok",
		})
	}))
	http.Handle("/", h)

	if err := http.ListenAndServe(":8080", nil); err != nil {
		log.SetOutput(os.Stderr) // make sure we print to console
		log.Fatal(err)
	}
}
Esempio n. 3
0
func main() {
	index := resource.NewIndex()

	users := index.Bind("users", user, mem.NewHandler(), resource.Conf{
		AllowedModes: resource.ReadWrite,
	})

	users.Alias("admin", url.Values{"filter": []string{`{"admin": true}`}})

	posts := index.Bind("posts", post, mem.NewHandler(), resource.Conf{
		AllowedModes: resource.ReadWrite,
	})

	posts.Bind("followers", "post", postFollower, mem.NewHandler(), resource.Conf{
		AllowedModes: resource.ReadWrite,
	})

	// Create API HTTP handler for the resource graph
	api, err := rest.NewHandler(index)
	if err != nil {
		log.Fatalf("Invalid API configuration: %s", err)
	}

	// Setup logger
	c := alice.New()
	c = c.Append(xlog.NewHandler(xlog.Config{}))
	c = c.Append(xaccess.NewHandler())
	c = c.Append(xlog.RequestHandler("req"))
	c = c.Append(xlog.RemoteAddrHandler("ip"))
	c = c.Append(xlog.UserAgentHandler("ua"))
	c = c.Append(xlog.RefererHandler("ref"))
	c = c.Append(xlog.RequestIDHandler("req_id", "Request-Id"))
	resource.LoggerLevel = resource.LogLevelDebug
	resource.Logger = func(ctx context.Context, level resource.LogLevel, msg string, fields map[string]interface{}) {
		xlog.FromContext(ctx).OutputF(xlog.Level(level), 2, msg, fields)
	}

	// Bind the API under /api/ path
	http.Handle("/api/", http.StripPrefix("/api/", c.Then(api)))

	// Create and bind the graphql endpoint
	graphql, err := graphql.NewHandler(index)
	if err != nil {
		log.Fatal(err)
	}
	http.Handle("/graphql", c.Then(graphql))
	http.HandleFunc("/graphiql", func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte(`
<!DOCTYPE html>
<html>
<head>
  <style>
    html, body {height: 100%; margin: 0; overflow: hidden; width: 100%;}
  </style>
  <link href="//cdn.jsdelivr.net/graphiql/0.4.9/graphiql.css" rel="stylesheet" />
  <script src="//cdn.jsdelivr.net/fetch/0.9.0/fetch.min.js"></script>
  <script src="//cdn.jsdelivr.net/react/0.14.7/react.min.js"></script>
  <script src="//cdn.jsdelivr.net/react/0.14.7/react-dom.min.js"></script>
  <script src="//cdn.jsdelivr.net/graphiql/0.4.9/graphiql.min.js"></script>
</head>
<body>
  <script>
    // Collect the URL parameters
    var parameters = {};
    window.location.search.substr(1).split('&').forEach(function (entry) {
      var eq = entry.indexOf('=');
      if (eq >= 0) {
        parameters[decodeURIComponent(entry.slice(0, eq))] =
          decodeURIComponent(entry.slice(eq + 1));
      }
    });

    // Produce a Location query string from a parameter object.
    function locationQuery(params) {
      return '/graphql?' + Object.keys(params).map(function (key) {
        return encodeURIComponent(key) + '=' +
          encodeURIComponent(params[key]);
      }).join('&');
    }

    // Derive a fetch URL from the current URL, sans the GraphQL parameters.
    var graphqlParamNames = {
      query: true,
      variables: true,
      operationName: true
    };

    var otherParams = {};
    for (var k in parameters) {
      if (parameters.hasOwnProperty(k) && graphqlParamNames[k] !== true) {
        otherParams[k] = parameters[k];
      }
    }
    var fetchURL = locationQuery(otherParams);

    // Defines a GraphQL fetcher using the fetch API.
    function graphQLFetcher(graphQLParams) {
      return fetch(fetchURL, {
        method: 'post',
        headers: {
          'Accept': 'application/json',
          'Content-Type': 'application/json'
        },
        body: JSON.stringify(graphQLParams),
        credentials: 'include',
      }).then(function (response) {
        return response.text();
      }).then(function (responseBody) {
        try {
          return JSON.parse(responseBody);
        } catch (error) {
          return responseBody;
        }
      });
    }

    // When the query and variables string is edited, update the URL bar so
    // that it can be easily shared.
    function onEditQuery(newQuery) {
      parameters.query = newQuery;
      updateURL();
    }

    function onEditVariables(newVariables) {
      parameters.variables = newVariables;
      updateURL();
    }

    function updateURL() {
      history.replaceState(null, null, locationQuery(parameters));
    }

    // Render <GraphiQL /> into the body.
    React.render(
      React.createElement(GraphiQL, {
        fetcher: graphQLFetcher,
        onEditQuery: onEditQuery,
        onEditVariables: onEditVariables,
		defaultQuery: "{\
  postsList{\
    i: id,\
    m: meta{\
      t: title,\
      b: body},\
    thumb_small_url: thumbnail_url(height:80)\
  }\
}",
      }),
      document.body
    );
  </script>
</body>
</html>`))
	})

	// Inject some fixtures
	fixtures := [][]string{
		{"PUT", "/users/johndoe", `{"name": "John Doe", "ip": "1.2.3.4", "password": "******", "admin": true}`},
		{"PUT", "/users/fan1", `{"name": "Fan 1", "ip": "1.2.3.4", "password": "******"}}`},
		{"PUT", "/users/fan2", `{"name": "Fan 2", "ip": "1.2.3.4", "password": "******"}}`},
		{"PUT", "/users/fan3", `{"name": "Fan 3", "ip": "1.2.3.4", "password": "******"}}`},
		{"PUT", "/users/fan4", `{"name": "Fan 4", "ip": "1.2.3.4", "password": "******"}}`},
		{"PUT", "/posts/ar5qrgukj5l7a6eq2ps0",
			`{
				"user": "******",
				"thumbnail_url": "http://dom.com/image.png",
				"meta": {
					"title": "First Post",
					"body": "This is my first post"
				}
			}`},
		{"POST", "/posts/ar5qrgukj5l7a6eq2ps0/followers", `{"user": "******"}`},
		{"POST", "/posts/ar5qrgukj5l7a6eq2ps0/followers", `{"user": "******"}`},
		{"POST", "/posts/ar5qrgukj5l7a6eq2ps0/followers", `{"user": "******"}`},
	}
	for _, fixture := range fixtures {
		req, err := http.NewRequest(fixture[0], fixture[1], strings.NewReader(fixture[2]))
		if err != nil {
			log.Fatal(err)
		}
		w := httptest.NewRecorder()
		api.ServeHTTP(w, req)
		if w.Code >= 400 {
			log.Fatalf("Error returned for `%s %s`: %v", fixture[0], fixture[1], w)
		}
	}

	// Serve it
	log.Print("Serving API on http://localhost:8080")
	log.Print("Visit http://localhost:8080/graphiql for a GraphiQL UI")
	log.Println("Play with (httpie):\n",
		"- http :8080/graphql query=='{postsList{id,thumb_s_url:thumbnail_url(height:80)}}'\n",
		"- http :8080/graphql query=='{postsList{i:id,m:meta{t:title, b:body},thumb_small_url:thumbnail_url(height:80)}}'\n",
		"- http :8080/graphql query=='{postsList{id,meta{title},user{id,name}}}'\n",
		"- http :8080/graphql query=='{posts(id:\"ar5qrgukj5l7a6eq2ps0\"){followers{post{id,meta{title}},user{id,name}}}}'\n",
		"- http :8080/graphql query=='{posts(id:\"ar5qrgukj5l7a6eq2ps0\"){id,meta{title},followers(limit:2){user{id,name}}}}'")
	if err := http.ListenAndServe(":8080", nil); err != nil {
		log.Fatal(err)
	}
}
Esempio n. 4
0
func main() {
	flag.Parse()

	// Create a REST API resource index
	index := resource.NewIndex()

	// Bind user on /users
	users := index.Bind("users", user, mem.NewHandler(), resource.Conf{
		AllowedModes: resource.ReadWrite,
	})

	// Init the db with some users (user registration is not handled by this example)
	secret, _ := schema.Password{}.Validate("secret")
	users.Insert(context.Background(), []*resource.Item{
		{ID: "admin", Updated: time.Now(), ETag: "abcd", Payload: map[string]interface{}{
			"id":       "jack",
			"name":     "Jack Sparrow",
			"password": secret,
		}},
		{ID: "john", Updated: time.Now(), ETag: "efgh", Payload: map[string]interface{}{
			"id":       "john",
			"name":     "John Doe",
			"password": secret,
		}},
	})

	// Bind post on /posts
	posts := index.Bind("posts", post, mem.NewHandler(), resource.Conf{
		AllowedModes: resource.ReadWrite,
	})

	// Protect resources
	users.Use(AuthResourceHook{UserField: "id"})
	posts.Use(AuthResourceHook{UserField: "user"})

	// Create API HTTP handler for the resource graph
	api, err := rest.NewHandler(index)
	if err != nil {
		log.Fatalf("Invalid API configuration: %s", err)
	}

	// Setup logger
	c := alice.New()
	c = c.Append(xlog.NewHandler(xlog.Config{}))
	c = c.Append(xaccess.NewHandler())
	c = c.Append(xlog.RequestHandler("req"))
	c = c.Append(xlog.RemoteAddrHandler("ip"))
	c = c.Append(xlog.UserAgentHandler("ua"))
	c = c.Append(xlog.RefererHandler("ref"))
	c = c.Append(xlog.RequestIDHandler("req_id", "Request-Id"))
	resource.LoggerLevel = resource.LogLevelDebug
	resource.Logger = func(ctx context.Context, level resource.LogLevel, msg string, fields map[string]interface{}) {
		xlog.FromContext(ctx).OutputF(xlog.Level(level), 2, msg, fields)
	}

	// Setup auth middleware
	jwtSecretBytes := []byte(*jwtSecret)
	c = c.Append(NewJWTHandler(users, func(t *jwt.Token) (interface{}, error) {
		println("paf")
		if t.Method != jwt.SigningMethodHS256 {
			return nil, jwt.ErrInvalidKey
		}
		return jwtSecretBytes, nil
	}))

	// Bind the API under /
	http.Handle("/", c.Then(api))

	// Demo tokens
	jackToken := jwt.New(jwt.SigningMethodHS256)
	jackClaims := jackToken.Claims.(jwt.MapClaims)
	jackClaims["user_id"] = "jack"
	jackTokenString, err := jackToken.SignedString(jwtSecretBytes)
	if err != nil {
		log.Fatal(err)
	}
	johnToken := jwt.New(jwt.SigningMethodHS256)
	johnClaims := johnToken.Claims.(jwt.MapClaims)
	johnClaims["user_id"] = "john"
	johnTokenString, err := johnToken.SignedString(jwtSecretBytes)
	if err != nil {
		log.Fatal(err)
	}

	// Serve it
	log.Print("Serving API on http://localhost:8080")
	log.Printf("Your token secret is %q, change it with the `-jwt-secret' flag", *jwtSecret)
	log.Print("Play with tokens:\n",
		"\n",
		"- http :8080/posts access_token==", johnTokenString, " title=\"John's post\"\n",
		"- http :8080/posts access_token==", johnTokenString, "\n",
		"- http :8080/posts\n",
		"\n",
		"- http :8080/posts access_token==", jackTokenString, " title=\"Jack's post\"\n",
		"- http :8080/posts access_token==", jackTokenString, "\n",
	)
	if err := http.ListenAndServe(":8080", nil); err != nil {
		log.Fatal(err)
	}
}
Esempio n. 5
0
func main() {
	// Create a REST API resource index
	index := resource.NewIndex()

	// Bind user on /users
	users := index.Bind("users", user, mem.NewHandler(), resource.Conf{
		AllowedModes: resource.ReadWrite,
	})

	// Init the db with some users (user registration is not handled by this example)
	secret, _ := schema.Password{}.Validate("secret")
	users.Insert(context.Background(), []*resource.Item{
		{ID: "admin", Updated: time.Now(), ETag: "abcd", Payload: map[string]interface{}{
			"id":       "admin",
			"name":     "Dilbert",
			"password": secret,
		}},
		{ID: "john", Updated: time.Now(), ETag: "efgh", Payload: map[string]interface{}{
			"id":       "john",
			"name":     "John Doe",
			"password": secret,
		}},
	})

	// Bind post on /posts
	posts := index.Bind("posts", post, mem.NewHandler(), resource.Conf{
		AllowedModes: resource.ReadWrite,
	})

	// Protect resources
	users.Use(AuthResourceHook{UserField: "id"})
	posts.Use(AuthResourceHook{UserField: "user"})

	// Create API HTTP handler for the resource graph
	api, err := rest.NewHandler(index)
	if err != nil {
		log.Fatalf("Invalid API configuration: %s", err)
	}

	// Setup logger
	c := alice.New()
	c = c.Append(xlog.NewHandler(xlog.Config{}))
	c = c.Append(xaccess.NewHandler())
	c = c.Append(xlog.RequestHandler("req"))
	c = c.Append(xlog.RemoteAddrHandler("ip"))
	c = c.Append(xlog.UserAgentHandler("ua"))
	c = c.Append(xlog.RefererHandler("ref"))
	c = c.Append(xlog.RequestIDHandler("req_id", "Request-Id"))
	resource.LoggerLevel = resource.LogLevelDebug
	resource.Logger = func(ctx context.Context, level resource.LogLevel, msg string, fields map[string]interface{}) {
		xlog.FromContext(ctx).OutputF(xlog.Level(level), 2, msg, fields)
	}

	// Setup auth middleware
	c = c.Append(NewBasicAuthHandler(users))

	// Bind the API under /
	http.Handle("/", c.Then(api))

	// Serve it
	log.Print("Serving API on http://localhost:8080")
	if err := http.ListenAndServe(":8080", nil); err != nil {
		log.Fatal(err)
	}
}