permissionbolt

package module
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 Go to latest Published: May 26, 2017 License: MIT Imports: 12 Imported by: 0

README

Permissionbolt Build Status GoDoc Report Card

Middleware for keeping track of users, login states and permissions.

Uses Bolt for the database. For using Redis as a backend instead, look into permissions2.

Features and limitations

  • Uses secure cookies and stores user information in a Bolt database.
  • Suitable for using Bolt database file (in a similar fashion to SQLite), registering/confirming users and managing public/user/admin pages.
  • Supports registration and confirmation via generated confirmation codes.
  • Tries to keep things simple.
  • Only supports "public", "user" and "admin" permissions out of the box, but offers functionality for implementing more fine grained permissions, if so desired.
  • Supports Negroni, Martini, Gin, Goji and plain net/http.
  • Should also work with other frameworks, since the standard http.HandlerFunc is used everywhere.
  • The default permissions can be cleared with the Clear() function.

Example for Negroni

package main

import (
	"fmt"
	"log"
	"net/http"
	"strings"

	"github.com/codegangsta/negroni"
	"github.com/xyproto/permissionbolt"
)

func main() {
	n := negroni.Classic()
	mux := http.NewServeMux()

	// New permissionbolt middleware
	perm, err := permissionbolt.New()
	if err != nil {
		log.Fatalln(err)
	}

	// Blank slate, no default permissions
	//perm.Clear()

	// Get the userstate, used in the handlers below
	userstate := perm.UserState()

	mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "Has user bob: %v\n", userstate.HasUser("bob"))
		fmt.Fprintf(w, "Logged in on server: %v\n", userstate.IsLoggedIn("bob"))
		fmt.Fprintf(w, "Is confirmed: %v\n", userstate.IsConfirmed("bob"))
		fmt.Fprintf(w, "Username stored in cookies (or blank): %v\n", userstate.Username(req))
		fmt.Fprintf(w, "Current user is logged in, has a valid cookie and *user rights*: %v\n", userstate.UserRights(req))
		fmt.Fprintf(w, "Current user is logged in, has a valid cookie and *admin rights*: %v\n", userstate.AdminRights(req))
		fmt.Fprintf(w, "\nTry: /register, /confirm, /remove, /login, /logout, /makeadmin, /clear, /data and /admin")
	})

	mux.HandleFunc("/register", func(w http.ResponseWriter, req *http.Request) {
		userstate.AddUser("bob", "hunter1", "bob@zombo.com")
		fmt.Fprintf(w, "User bob was created: %v\n", userstate.HasUser("bob"))
	})

	mux.HandleFunc("/confirm", func(w http.ResponseWriter, req *http.Request) {
		userstate.MarkConfirmed("bob")
		fmt.Fprintf(w, "User bob was confirmed: %v\n", userstate.IsConfirmed("bob"))
	})

	mux.HandleFunc("/remove", func(w http.ResponseWriter, req *http.Request) {
		userstate.RemoveUser("bob")
		fmt.Fprintf(w, "User bob was removed: %v\n", !userstate.HasUser("bob"))
	})

	mux.HandleFunc("/login", func(w http.ResponseWriter, req *http.Request) {
		userstate.Login(w, "bob")
		fmt.Fprintf(w, "bob is now logged in: %v\n", userstate.IsLoggedIn("bob"))
	})

	mux.HandleFunc("/logout", func(w http.ResponseWriter, req *http.Request) {
		userstate.Logout("bob")
		fmt.Fprintf(w, "bob is now logged out: %v\n", !userstate.IsLoggedIn("bob"))
	})

	mux.HandleFunc("/makeadmin", func(w http.ResponseWriter, req *http.Request) {
		userstate.SetAdminStatus("bob")
		fmt.Fprintf(w, "bob is now administrator: %v\n", userstate.IsAdmin("bob"))
	})

	mux.HandleFunc("/clear", func(w http.ResponseWriter, req *http.Request) {
		userstate.ClearCookie(w)
		fmt.Fprintf(w, "Clearing cookie")
	})

	mux.HandleFunc("/data", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "user page that only logged in users must see!")
	})

	mux.HandleFunc("/admin", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "super secret information that only logged in administrators must see!\n\n")
		if usernames, err := userstate.AllUsernames(); err == nil {
			fmt.Fprintf(w, "list of all users: "+strings.Join(usernames, ", "))
		}
	})

	// Custom handler for when permissions are denied
	perm.SetDenyFunction(func(w http.ResponseWriter, req *http.Request) {
		http.Error(w, "Permission denied!", http.StatusForbidden)
	})

	// Enable the permissionbolt middleware
	n.Use(perm)

	// Use mux for routing, this goes last
	n.UseHandler(mux)

	// Serve
	n.Run(":3000")
}

Example for Martini

package main

import (
	"fmt"
	"log"
	"net/http"
	"strings"

	"github.com/go-martini/martini"
	"github.com/xyproto/permissionbolt"
)

func main() {
	m := martini.Classic()

	// New permissionbolt middleware
	perm, err := permissionbolt.New()
	if err != nil {
		log.Fatalln(err)
	}

	// Blank slate, no default permissions
	//perm.Clear()

	// Get the userstate, used in the handlers below
	userstate := perm.UserState()

	m.Get("/", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "Has user bob: %v\n", userstate.HasUser("bob"))
		fmt.Fprintf(w, "Logged in on server: %v\n", userstate.IsLoggedIn("bob"))
		fmt.Fprintf(w, "Is confirmed: %v\n", userstate.IsConfirmed("bob"))
		fmt.Fprintf(w, "Username stored in cookies (or blank): %v\n", userstate.Username(req))
		fmt.Fprintf(w, "Current user is logged in, has a valid cookie and *user rights*: %v\n", userstate.UserRights(req))
		fmt.Fprintf(w, "Current user is logged in, has a valid cookie and *admin rights*: %v\n", userstate.AdminRights(req))
		fmt.Fprintf(w, "\nTry: /register, /confirm, /remove, /login, /logout, /makeadmin, /clear, /data and /admin")
	})

	m.Get("/register", func(w http.ResponseWriter) {
		userstate.AddUser("bob", "hunter1", "bob@zombo.com")
		fmt.Fprintf(w, "User bob was created: %v\n", userstate.HasUser("bob"))
	})

	m.Get("/confirm", func(w http.ResponseWriter) {
		userstate.MarkConfirmed("bob")
		fmt.Fprintf(w, "User bob was confirmed: %v\n", userstate.IsConfirmed("bob"))
	})

	m.Get("/remove", func(w http.ResponseWriter) {
		userstate.RemoveUser("bob")
		fmt.Fprintf(w, "User bob was removed: %v\n", !userstate.HasUser("bob"))
	})

	m.Get("/login", func(w http.ResponseWriter) {
		userstate.Login(w, "bob")
		fmt.Fprintf(w, "bob is now logged in: %v\n", userstate.IsLoggedIn("bob"))
	})

	m.Get("/logout", func(w http.ResponseWriter) {
		userstate.Logout("bob")
		fmt.Fprintf(w, "bob is now logged out: %v\n", !userstate.IsLoggedIn("bob"))
	})

	m.Get("/makeadmin", func(w http.ResponseWriter) {
		userstate.SetAdminStatus("bob")
		fmt.Fprintf(w, "bob is now administrator: %v\n", userstate.IsAdmin("bob"))
	})

	m.Get("/clear", func(w http.ResponseWriter) {
		userstate.ClearCookie(w)
		fmt.Fprintf(w, "Clearing cookie")
	})

	m.Get("/data", func(w http.ResponseWriter) {
		fmt.Fprintf(w, "user page that only logged in users must see!")
	})

	m.Get("/admin", func(w http.ResponseWriter) {
		fmt.Fprintf(w, "super secret information that only logged in administrators must see!\n\n")
		if usernames, err := userstate.AllUsernames(); err == nil {
			fmt.Fprintf(w, "list of all users: "+strings.Join(usernames, ", "))
		}
	})

	// Set up a middleware handler for Martini, with a custom "permission denied" message.
	permissionHandler := func(w http.ResponseWriter, req *http.Request, c martini.Context) {
		// Check if the user has the right admin/user rights
		if perm.Rejected(w, req) {
			// Deny the request
			http.Error(w, "Permission denied!", http.StatusForbidden)
			// Reject the request by not calling the next handler below
			return
		}
		// Call the next middleware handler
		c.Next()
	}

	// Enable the permissionbolt middleware
	m.Use(permissionHandler)

	// Serve
	m.Run()
}

Example for Gin

package main

import (
	"fmt"
	"log"
	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/xyproto/permissionbolt"
)

func main() {
	g := gin.New()

	// New permissionbolt middleware
	perm, err := permissionbolt.New()
	if err != nil {
		log.Fatalln(err)
	}

	// Blank slate, no default permissions
	//perm.Clear()

	// Set up a middleware handler for Gin, with a custom "permission denied" message.
	permissionHandler := func(c *gin.Context) {
		// Check if the user has the right admin/user rights
		if perm.Rejected(c.Writer, c.Request) {
			// Deny the request, don't call other middleware handlers
			c.AbortWithStatus(http.StatusForbidden)
			fmt.Fprint(c.Writer, "Permission denied!")
			return
		}
		// Call the next middleware handler
		c.Next()
	}

	// Logging middleware
	g.Use(gin.Logger())

	// Enable the permissionbolt middleware, must come before recovery
	g.Use(permissionHandler)

	// Recovery middleware
	g.Use(gin.Recovery())

	// Get the userstate, used in the handlers below
	userstate := perm.UserState()

	g.GET("/", func(c *gin.Context) {
		msg := ""
		msg += fmt.Sprintf("Has user bob: %v\n", userstate.HasUser("bob"))
		msg += fmt.Sprintf("Logged in on server: %v\n", userstate.IsLoggedIn("bob"))
		msg += fmt.Sprintf("Is confirmed: %v\n", userstate.IsConfirmed("bob"))
		msg += fmt.Sprintf("Username stored in cookies (or blank): %v\n", userstate.Username(c.Request))
		msg += fmt.Sprintf("Current user is logged in, has a valid cookie and *user rights*: %v\n", userstate.UserRights(c.Request))
		msg += fmt.Sprintf("Current user is logged in, has a valid cookie and *admin rights*: %v\n", userstate.AdminRights(c.Request))
		msg += fmt.Sprintln("\nTry: /register, /confirm, /remove, /login, /logout, /makeadmin, /clear, /data and /admin")
		c.String(http.StatusOK, msg)
	})

	g.GET("/register", func(c *gin.Context) {
		userstate.AddUser("bob", "hunter1", "bob@zombo.com")
		c.String(http.StatusOK, fmt.Sprintf("User bob was created: %v\n", userstate.HasUser("bob")))
	})

	g.GET("/confirm", func(c *gin.Context) {
		userstate.MarkConfirmed("bob")
		c.String(http.StatusOK, fmt.Sprintf("User bob was confirmed: %v\n", userstate.IsConfirmed("bob")))
	})

	g.GET("/remove", func(c *gin.Context) {
		userstate.RemoveUser("bob")
		c.String(http.StatusOK, fmt.Sprintf("User bob was removed: %v\n", !userstate.HasUser("bob")))
	})

	g.GET("/login", func(c *gin.Context) {
		// Headers will be written, for storing a cookie
		userstate.Login(c.Writer, "bob")
		c.String(http.StatusOK, fmt.Sprintf("bob is now logged in: %v\n", userstate.IsLoggedIn("bob")))
	})

	g.GET("/logout", func(c *gin.Context) {
		userstate.Logout("bob")
		c.String(http.StatusOK, fmt.Sprintf("bob is now logged out: %v\n", !userstate.IsLoggedIn("bob")))
	})

	g.GET("/makeadmin", func(c *gin.Context) {
		userstate.SetAdminStatus("bob")
		c.String(http.StatusOK, fmt.Sprintf("bob is now administrator: %v\n", userstate.IsAdmin("bob")))
	})

	g.GET("/clear", func(c *gin.Context) {
		userstate.ClearCookie(c.Writer)
		c.String(http.StatusOK, "Clearing cookie")
	})

	g.GET("/data", func(c *gin.Context) {
		c.String(http.StatusOK, "user page that only logged in users must see!")
	})

	g.GET("/admin", func(c *gin.Context) {
		c.String(http.StatusOK, "super secret information that only logged in administrators must see!\n\n")
		if usernames, err := userstate.AllUsernames(); err == nil {
			c.String(http.StatusOK, "list of all users: "+strings.Join(usernames, ", "))
		}
	})

	// Serve
	g.Run(":3000")
}

Example for Goji

package main

import (
	"fmt"
	"log"
	"net/http"
	"strings"

	"github.com/xyproto/permissionbolt"
	"github.com/zenazn/goji"
)

func main() {
	// New permissions middleware
	perm, err := permissionbolt.New()
	if err != nil {
		log.Fatalln(err)
	}

	// Blank slate, no default permissions
	//perm.Clear()

	// Get the userstate, used in the handlers below
	userstate := perm.UserState()

	goji.Get("/", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "Has user bob: %v\n", userstate.HasUser("bob"))
		fmt.Fprintf(w, "Logged in on server: %v\n", userstate.IsLoggedIn("bob"))
		fmt.Fprintf(w, "Is confirmed: %v\n", userstate.IsConfirmed("bob"))
		fmt.Fprintf(w, "Username stored in cookies (or blank): %v\n", userstate.Username(req))
		fmt.Fprintf(w, "Current user is logged in, has a valid cookie and *user rights*: %v\n", userstate.UserRights(req))
		fmt.Fprintf(w, "Current user is logged in, has a valid cookie and *admin rights*: %v\n", userstate.AdminRights(req))
		fmt.Fprintf(w, "\nTry: /register, /confirm, /remove, /login, /logout, /makeadmin, /clear, /data and /admin")
	})

	goji.Get("/register", func(w http.ResponseWriter, req *http.Request) {
		userstate.AddUser("bob", "hunter1", "bob@zombo.com")
		fmt.Fprintf(w, "User bob was created: %v\n", userstate.HasUser("bob"))
	})

	goji.Get("/confirm", func(w http.ResponseWriter, req *http.Request) {
		userstate.MarkConfirmed("bob")
		fmt.Fprintf(w, "User bob was confirmed: %v\n", userstate.IsConfirmed("bob"))
	})

	goji.Get("/remove", func(w http.ResponseWriter, req *http.Request) {
		userstate.RemoveUser("bob")
		fmt.Fprintf(w, "User bob was removed: %v\n", !userstate.HasUser("bob"))
	})

	goji.Get("/login", func(w http.ResponseWriter, req *http.Request) {
		userstate.Login(w, "bob")
		fmt.Fprintf(w, "bob is now logged in: %v\n", userstate.IsLoggedIn("bob"))
	})

	goji.Get("/logout", func(w http.ResponseWriter, req *http.Request) {
		userstate.Logout("bob")
		fmt.Fprintf(w, "bob is now logged out: %v\n", !userstate.IsLoggedIn("bob"))
	})

	goji.Get("/makeadmin", func(w http.ResponseWriter, req *http.Request) {
		userstate.SetAdminStatus("bob")
		fmt.Fprintf(w, "bob is now administrator: %v\n", userstate.IsAdmin("bob"))
	})

	goji.Get("/clear", func(w http.ResponseWriter, req *http.Request) {
		userstate.ClearCookie(w)
		fmt.Fprintf(w, "Clearing cookie")
	})

	goji.Get("/data", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "user page that only logged in users must see!")
	})

	goji.Get("/admin", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "super secret information that only logged in administrators must see!\n\n")
		if usernames, err := userstate.AllUsernames(); err == nil {
			fmt.Fprintf(w, "list of all users: "+strings.Join(usernames, ", "))
		}
	})

	// Custom "permissions denied" message
	perm.SetDenyFunction(func(w http.ResponseWriter, req *http.Request) {
		http.Error(w, "Permission denied!", http.StatusForbidden)
	})

	// Permissions middleware for Goji
	permissionHandler := func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
			// Check if the user has the right admin/user rights
			if perm.Rejected(w, req) {
				// Deny the request
				perm.DenyFunction()(w, req)
				return
			}
			// Serve the requested page
			next.ServeHTTP(w, req)
		})
	}

	// Enable the permissions middleware
	goji.Use(permissionHandler)

	// Goji will listen to port 8000 by default
	goji.Serve()
}

Example for just net/http

package main

import (
	"fmt"
	"log"
	"net/http"
	"strings"
	"time"

	"github.com/xyproto/permissionbolt"
	"github.com/xyproto/pinterface"
)

type permissionHandler struct {
	// perm is a Permissions structure that can be used to deny requests
	// and acquire the UserState. By using `pinterface.IPermissions` instead
	// of `*permissionbolt.Permissions`, the code is compatible with not only
	// `permissionbolt`, but also other modules that uses other database
	// backends, like `permissions2` which uses Redis.
	perm pinterface.IPermissions

	// The HTTP multiplexer
	mux *http.ServeMux
}

// Implement the ServeHTTP method to make a permissionHandler a http.Handler
func (ph *permissionHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	// Check if the user has the right admin/user rights
	if ph.perm.Rejected(w, req) {
		// Let the user know, by calling the custom "permission denied" function
		ph.perm.DenyFunction()(w, req)
		// Reject the request by not calling the next handler below
		return
	}
	// Serve the requested page if permissions were granted
	ph.mux.ServeHTTP(w, req)
}

func main() {
	mux := http.NewServeMux()

	// New permissionbolt middleware
	perm, err := permissionbolt.New()
	if err != nil {
		log.Fatal("Could not open Bolt database")
	}

	// Blank slate, no default permissions
	//perm.Clear()

	// Get the userstate, used in the handlers below
	userstate := perm.UserState()

	mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "Has user bob: %v\n", userstate.HasUser("bob"))
		fmt.Fprintf(w, "Logged in on server: %v\n", userstate.IsLoggedIn("bob"))
		fmt.Fprintf(w, "Is confirmed: %v\n", userstate.IsConfirmed("bob"))
		fmt.Fprintf(w, "Username stored in cookies (or blank): %v\n", userstate.Username(req))
		fmt.Fprintf(w, "Current user is logged in, has a valid cookie and *user rights*: %v\n", userstate.UserRights(req))
		fmt.Fprintf(w, "Current user is logged in, has a valid cookie and *admin rights*: %v\n", userstate.AdminRights(req))
		fmt.Fprintf(w, "\nTry: /register, /confirm, /remove, /login, /logout, /makeadmin, /clear, /data and /admin")
	})

	mux.HandleFunc("/register", func(w http.ResponseWriter, req *http.Request) {
		userstate.AddUser("bob", "hunter1", "bob@zombo.com")
		fmt.Fprintf(w, "User bob was created: %v\n", userstate.HasUser("bob"))
	})

	mux.HandleFunc("/confirm", func(w http.ResponseWriter, req *http.Request) {
		userstate.MarkConfirmed("bob")
		fmt.Fprintf(w, "User bob was confirmed: %v\n", userstate.IsConfirmed("bob"))
	})

	mux.HandleFunc("/remove", func(w http.ResponseWriter, req *http.Request) {
		userstate.RemoveUser("bob")
		fmt.Fprintf(w, "User bob was removed: %v\n", !userstate.HasUser("bob"))
	})

	mux.HandleFunc("/login", func(w http.ResponseWriter, req *http.Request) {
		userstate.Login(w, "bob")
		fmt.Fprintf(w, "bob is now logged in: %v\n", userstate.IsLoggedIn("bob"))
	})

	mux.HandleFunc("/logout", func(w http.ResponseWriter, req *http.Request) {
		userstate.Logout("bob")
		fmt.Fprintf(w, "bob is now logged out: %v\n", !userstate.IsLoggedIn("bob"))
	})

	mux.HandleFunc("/makeadmin", func(w http.ResponseWriter, req *http.Request) {
		userstate.SetAdminStatus("bob")
		fmt.Fprintf(w, "bob is now administrator: %v\n", userstate.IsAdmin("bob"))
	})

	mux.HandleFunc("/clear", func(w http.ResponseWriter, req *http.Request) {
		userstate.ClearCookie(w)
		fmt.Fprintf(w, "Clearing cookie")
	})

	mux.HandleFunc("/data", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "user page that only logged in users must see!")
	})

	mux.HandleFunc("/admin", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "super secret information that only logged in administrators must see!\n\n")
		if usernames, err := userstate.AllUsernames(); err == nil {
			fmt.Fprintf(w, "list of all users: "+strings.Join(usernames, ", "))
		}
	})

	// Custom handler for when permissions are denied
	perm.SetDenyFunction(func(w http.ResponseWriter, req *http.Request) {
		http.Error(w, "Permission denied!", http.StatusForbidden)
	})

	// Configure the HTTP server and permissionHandler struct
	s := &http.Server{
		Addr:           ":3000",
		Handler:        &permissionHandler{perm, mux},
		ReadTimeout:    10 * time.Second,
		WriteTimeout:   10 * time.Second,
		MaxHeaderBytes: 1 << 20,
	}

	log.Println("Listening for requests on port 3000")

	// Start listening
	s.ListenAndServe()
}

Default permissions

  • The /admin path prefix has admin rights by default.
  • These path prefixes have user rights by default: /repo and /data
  • These path prefixes are public by default: /, /login, /register, /style, /img, /js, /favicon.ico, /robots.txt and /sitemap_index.xml

The default permissions can be cleared with the Clear() function.

Password hashing

  • bcrypt is used by default for hashing passwords. sha256 is also supported.
  • By default, all new password will be hashed with bcrypt.
  • For backwards compatibility, old password hashes with the length of a sha256 hash will be checked with sha256. To disable this behavior, and only ever use bcrypt, add this line: userstate.SetPasswordAlgo("bcrypt")

Additional resources

Coding style

  • log.Fatal or panic shall only be used for problems that may occur when starting the application, like not being able to connect to the database. The rest of the functions should return errors instead, so that they can be handled.
  • The code shall always be formatted with go fmt.

Online API Documentation

godoc.org

General information

Documentation

Overview

Package permissionbolt provides middleware for keeping track of users, login states and permissions.

Index

Constants

View Source 
const (
	// Version number. Stable API within major version numbers.
	Version = 2.0
)

Variables

This section is empty.

Functions

func PermissionDenied 

func PermissionDenied(w http.ResponseWriter, req *http.Request)

PermissionDenied is the default "permission denied" handler function

func ValidUsernamePassword 

func ValidUsernamePassword(username, password string) error

ValidUsernamePassword only checks if the given username and password are different and if they only contain letters, numbers and/or underscore. For checking if a given password is correct, use the `CorrectPassword` function instead.

Types

type Permissions 

type Permissions struct {
	// contains filtered or unexported fields
}

The Permissions structure keeps track of the permissions for various path prefixes

func New 

func New() (*Permissions, error)

New initializes a Permissions struct with all the default settings.

func NewPermissions 

func NewPermissions(state *UserState) *Permissions

NewPermissions initializes a Permissions struct with the given UserState and a few default paths for admin/user/public path prefixes.

func NewWithConf 

func NewWithConf(filename string) (*Permissions, error)

NewWithConf initializes a Permissions struct with a database filename

func (*Permissions) AddAdminPath 

func (perm *Permissions) AddAdminPath(prefix string)

AddAdminPath adds an URL path prefix for pages that are only accessible for logged in administrators

func (*Permissions) AddPublicPath 

func (perm *Permissions) AddPublicPath(prefix string)

AddPublicPath adds an URL path prefix for pages that are public

func (*Permissions) AddUserPath 

func (perm *Permissions) AddUserPath(prefix string)

AddUserPath adds an URL path prefix for pages that are only accessible for logged in users

func (*Permissions) Clear 

func (perm *Permissions) Clear()

Clear sets every permission to public

func (*Permissions) DenyFunction 

func (perm *Permissions) DenyFunction() http.HandlerFunc

DenyFunction returns the currently configured http.HandlerFunc for when permissions are denied

func (*Permissions) Rejected 

func (perm *Permissions) Rejected(w http.ResponseWriter, req *http.Request) bool

Rejected checks if a given http request should be rejected

func (*Permissions) ServeHTTP 

func (perm *Permissions) ServeHTTP(w http.ResponseWriter, req *http.Request, next http.HandlerFunc)

Middleware handler (compatible with Negroni)

func (*Permissions) SetAdminPath 

func (perm *Permissions) SetAdminPath(pathPrefixes []string)

SetAdminPath sets all URL path prefixes for pages that are only accessible for logged in administrators

func (*Permissions) SetDenyFunction 

func (perm *Permissions) SetDenyFunction(f http.HandlerFunc)

SetDenyFunction specifies a http.HandlerFunc for when the permissions are denied

func (*Permissions) SetPublicPath 

func (perm *Permissions) SetPublicPath(pathPrefixes []string)

SetPublicPath sets all URL path prefixes for pages that are public

func (*Permissions) SetUserPath 

func (perm *Permissions) SetUserPath(pathPrefixes []string)

SetUserPath sets all URL path prefixes for pages that are only accessible for logged in users

func (*Permissions) UserState 

func (perm *Permissions) UserState() pinterface.IUserState

UserState retrieves the UserState struct

type UserState 

type UserState struct {
	// contains filtered or unexported fields
}

The UserState struct holds the pointer to the underlying database and a few other settings

func NewUserState 

func NewUserState(filename string, randomseed bool) (*UserState, error)

NewUserState creates a new UserState struct that can be used for managing users. connectionString may be on the form "username:password@host:port/database". If randomseed is true, the random number generator will be seeded after generating the cookie secret (true is a good default value).

func NewUserStateSimple 

func NewUserStateSimple() (*UserState, error)

NewUserStateSimple creates a new UserState struct that can be used for managing users. The random number generator will be seeded after generating the cookie secret.

func (*UserState) AddUnconfirmed 

func (state *UserState) AddUnconfirmed(username, confirmationCode string)

AddUnconfirmed adds a user to a list of users that are registered, but not confirmed.

func (*UserState) AddUser 

func (state *UserState) AddUser(username, password, email string)

AddUser creates a user and hashes the password, does not check for rights. The given data must be valid.

func (*UserState) AdminRights 

func (state *UserState) AdminRights(req *http.Request) bool

AdminRights checks if the current user is logged in and has administrator rights.

func (*UserState) AllUnconfirmedUsernames 

func (state *UserState) AllUnconfirmedUsernames() ([]string, error)

AllUnconfirmedUsernames returns a list of all registered users that are not yet confirmed.

func (*UserState) AllUsernames 

func (state *UserState) AllUsernames() ([]string, error)

AllUsernames retrieves a list of all usernames.

func (*UserState) AlreadyHasConfirmationCode 

func (state *UserState) AlreadyHasConfirmationCode(confirmationCode string) bool

AlreadyHasConfirmationCode goes through all the confirmationCodes of all the unconfirmed users and checks if this confirmationCode already is in use.

func (*UserState) BooleanField 

func (state *UserState) BooleanField(username, fieldname string) bool

BooleanField returns a boolean value for the given username and fieldname. If the user or field is missing, false will be returned. Useful for states where it makes sense that the returned value is not true unless everything is in order.

func (*UserState) ClearCookie 

func (state *UserState) ClearCookie(w http.ResponseWriter)

ClearCookie tries to clear the user cookie by setting it to be expired. Some browsers *may* be configured to keep cookies even after this.

func (*UserState) Close 

func (state *UserState) Close()

Close the connection to the database host

func (*UserState) Confirm 

func (state *UserState) Confirm(username string)

Confirm marks a user as confirmed, and removes the username from the list of unconfirmed users.

func (*UserState) ConfirmUserByConfirmationCode 

func (state *UserState) ConfirmUserByConfirmationCode(confirmationCode string) error

ConfirmUserByConfirmationCode takes a unique confirmation code and marks the corresponding unconfirmed user as confirmed.

func (*UserState) ConfirmationCode 

func (state *UserState) ConfirmationCode(username string) (string, error)

ConfirmationCode returns the stored confirmation code for a specific user.

func (*UserState) CookieSecret 

func (state *UserState) CookieSecret() string

CookieSecret returns the current cookie secret

func (*UserState) CookieTimeout 

func (state *UserState) CookieTimeout(username string) int64

CookieTimeout returns the current login cookie timeout, in seconds.

func (*UserState) CorrectPassword 

func (state *UserState) CorrectPassword(username, password string) bool

CorrectPassword checks if a password is correct. "username" is needed because it may be part of the hash for some password hashing algorithms.

func (*UserState) Creator 

func (state *UserState) Creator() pinterface.ICreator

Creator returns a struct for creating data structures.

func (*UserState) Database 

func (state *UserState) Database() *simplebolt.Database

Database retrieves the underlying database

func (*UserState) Email 

func (state *UserState) Email(username string) (string, error)

Email returns the email address for the given username.

func (*UserState) FindUserByConfirmationCode 

func (state *UserState) FindUserByConfirmationCode(confirmationCode string) (string, error)

FindUserByConfirmationCode tries to find the corresponding username, given a unique confirmation code.

func (*UserState) GenerateUniqueConfirmationCode 

func (state *UserState) GenerateUniqueConfirmationCode() (string, error)

GenerateUniqueConfirmationCode generates a unique confirmation code that can be used for confirming users.

func (*UserState) HasUser 

func (state *UserState) HasUser(username string) bool

HasUser checks if the given username exists.

func (*UserState) HashPassword 

func (state *UserState) HashPassword(username, password string) string

HashPassword takes a password and creates a password hash. It also takes a username, since some algorithms may use it for salt.

func (*UserState) Host 

func (state *UserState) Host() pinterface.IHost

Host retrieves the underlying database. It helps fulfill the IHost interface.

func (*UserState) IsAdmin 

func (state *UserState) IsAdmin(username string) bool

IsAdmin checks if a user is an administrator.

func (*UserState) IsConfirmed 

func (state *UserState) IsConfirmed(username string) bool

IsConfirmed checks if a user is confirmed (can be used for "e-mail confirmation").

func (*UserState) IsLoggedIn 

func (state *UserState) IsLoggedIn(username string) bool

IsLoggedIn checks if a user is logged in.

func (*UserState) Login 

func (state *UserState) Login(w http.ResponseWriter, username string) error

Login is a convenience function for logging a user in and storing the username in a cookie. Returns an error if the cookie could not be set.

func (*UserState) Logout 

func (state *UserState) Logout(username string)

Logout is a convenience function for logging out a user.

func (*UserState) MarkConfirmed 

func (state *UserState) MarkConfirmed(username string)

MarkConfirmed marks a user as being confirmed.

func (*UserState) PasswordAlgo 

func (state *UserState) PasswordAlgo() string

PasswordAlgo returns the current password hashing algorithm.

func (*UserState) PasswordHash 

func (state *UserState) PasswordHash(username string) (string, error)

PasswordHash returns the password hash for the given username.

func (*UserState) RemoveAdminStatus 

func (state *UserState) RemoveAdminStatus(username string)

RemoveAdminStatus removes the administrator status from a user.

func (*UserState) RemoveUnconfirmed 

func (state *UserState) RemoveUnconfirmed(username string)

RemoveUnconfirmed removes a user from a list of users that are registered, but not confirmed.

func (*UserState) RemoveUser 

func (state *UserState) RemoveUser(username string)

RemoveUser removes a user and the login status for this user.

func (*UserState) SetAdminStatus 

func (state *UserState) SetAdminStatus(username string)

SetAdminStatus marks a user as an administrator.

func (*UserState) SetBooleanField 

func (state *UserState) SetBooleanField(username, fieldname string, val bool)

SetBooleanField stores a boolean value given a username and a custom fieldname.

func (*UserState) SetCookieSecret 

func (state *UserState) SetCookieSecret(cookieSecret string)

SetCookieSecret sets the current cookie secret

func (*UserState) SetCookieTimeout 

func (state *UserState) SetCookieTimeout(cookieTime int64)

SetCookieTimeout sets how long a login cookie should last, in seconds.

func (*UserState) SetLoggedIn 

func (state *UserState) SetLoggedIn(username string)

SetLoggedIn marks a user as logged in. Use the Login function instead, unless cookies are not involved.

func (*UserState) SetLoggedOut 

func (state *UserState) SetLoggedOut(username string)

SetLoggedOut marks a user as logged out.

func (*UserState) SetMinimumConfirmationCodeLength 

func (state *UserState) SetMinimumConfirmationCodeLength(length int)

SetMinimumConfirmationCodeLength sets the minimum length of the user confirmation code. The default is 20.

func (*UserState) SetPassword 

func (state *UserState) SetPassword(username, password string)

SetPassword sets/changes the password for a user. Does not take a password hash, will hash the password string.

func (*UserState) SetPasswordAlgo 

func (state *UserState) SetPasswordAlgo(algorithm string) error

SetPasswordAlgo determines which password hashing algorithm should be used. 

*
* The default value is "bcrypt+".
*
* Possible values are:
*    bcrypt  -> Store and check passwords with the bcrypt hash.
*    sha256  -> Store and check passwords with the sha256 hash.
*    bcrypt+ -> Store passwords with bcrypt, but check with both
*               bcrypt and sha256, for backwards compatibility
*               with old passwords that has been stored as sha256.

func (*UserState) SetUsernameCookie 

func (state *UserState) SetUsernameCookie(w http.ResponseWriter, username string) error

SetUsernameCookie tries to store the given username in a cookie in the browser. 

*
* The user must exist. Returns an error if the username is empty or does not exist.
* Returns nil if the cookie has been attempted to be set.
* To check if the cookie has actually been set, one must try to read it.

func (*UserState) SetUsernameCookieOnlyHTTPS 

func (state *UserState) SetUsernameCookieOnlyHTTPS(w http.ResponseWriter, username string) error

SetUsernameCookieOnlyHTTPS tries to store the given username in a cookie in the browser.

  • This function will not set the cookie if over plain HTTP. *
  • The user must exist. Returns an error if the username is empty or does not exist.
  • Returns nil if the cookie has been attempted to be set.
  • To check if the cookie has actually been set, one must try to read it.

func (*UserState) UserRights 

func (state *UserState) UserRights(req *http.Request) bool

UserRights checks if the current user is logged in and has user rights.

func (*UserState) Username 

func (state *UserState) Username(req *http.Request) string

Username is a convenience function for returning the current username (from the browser cookie), or an empty string.

func (*UserState) UsernameCookie 

func (state *UserState) UsernameCookie(req *http.Request) (string, error)

UsernameCookie retrieves the username that is stored in a cookie in the browser, if available.

func (*UserState) Users 

func (state *UserState) Users() pinterface.IHashMap

Users returns a hash map of all the users.

Source Files

View all Source files

Directories

Path Synopsis
examples
gin
goji
http
martini
negroni

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