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Rename rw, req to w, r

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This commit is contained in:
adnano 2020-10-13 20:22:12 -04:00
parent 67842c6425
commit faf94d8ba5
4 changed files with 81 additions and 81 deletions
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12
doc.go
View File

@ -64,14 +64,14 @@ Servers must be configured with certificates:
Servers can accept requests for multiple hosts and schemes:
server.HandleFunc("example.com", func(rw *gmi.ResponseWriter, req *gmi.Request) {
fmt.Fprint(rw, "Welcome to example.com")
server.HandleFunc("example.com", func(w *gmi.ResponseWriter, r *gmi.Request) {
fmt.Fprint(w, "Welcome to example.com")
})
server.HandleFunc("example.org", func(rw *gmi.ResponseWriter, req *gmi.Request) {
fmt.Fprint(rw, "Welcome to example.org")
server.HandleFunc("example.org", func(w *gmi.ResponseWriter, r *gmi.Request) {
fmt.Fprint(w, "Welcome to example.org")
})
server.HandleSchemeFunc("http", "example.net", func(rw *gmi.ResponseWriter, req *gmi.Request) {
fmt.Fprint(rw, "Proxied content from example.net")
server.HandleSchemeFunc("http", "example.net", func(w *gmi.ResponseWriter, r *gmi.Request) {
fmt.Fprint(w, "Proxied content from example.net")
})
To start the server, call ListenAndServe:

48
examples/auth.go
View File

@ -58,75 +58,75 @@ func getSession(crt *x509.Certificate) (*session, bool) {
return session, ok
}
func welcome(rw *gmi.ResponseWriter, req *gmi.Request) {
rw.Write([]byte("Welcome to this example.\n=> /login Login\n"))
func welcome(w *gmi.ResponseWriter, r *gmi.Request) {
w.Write([]byte("Welcome to this example.\n=> /login Login\n"))
}
func login(rw *gmi.ResponseWriter, req *gmi.Request) {
gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
gmi.WithInput(rw, req, "Username", func(username string) {
func login(w *gmi.ResponseWriter, r *gmi.Request) {
gmi.WithCertificate(w, r, func(cert *x509.Certificate) {
gmi.WithInput(w, r, "Username", func(username string) {
fingerprint := gmi.Fingerprint(cert)
sessions[fingerprint] = &session{
username: username,
}
gmi.Redirect(rw, req, "/login/password")
gmi.Redirect(w, r, "/login/password")
})
})
}
func loginPassword(rw *gmi.ResponseWriter, req *gmi.Request) {
gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
func loginPassword(w *gmi.ResponseWriter, r *gmi.Request) {
gmi.WithCertificate(w, r, func(cert *x509.Certificate) {
session, ok := getSession(cert)
if !ok {
gmi.CertificateNotAuthorized(rw, req)
gmi.CertificateNotAuthorized(w, r)
return
}
gmi.WithSensitiveInput(rw, req, "Password", func(password string) {
gmi.WithSensitiveInput(w, r, "Password", func(password string) {
expected := logins[session.username].password
if password == expected {
session.authorized = true
gmi.Redirect(rw, req, "/profile")
gmi.Redirect(w, r, "/profile")
} else {
gmi.SensitiveInput(rw, req, "Wrong password. Try again")
gmi.SensitiveInput(w, r, "Wrong password. Try again")
}
})
})
}
func logout(rw *gmi.ResponseWriter, req *gmi.Request) {
gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
func logout(w *gmi.ResponseWriter, r *gmi.Request) {
gmi.WithCertificate(w, r, func(cert *x509.Certificate) {
fingerprint := gmi.Fingerprint(cert)
delete(sessions, fingerprint)
})
rw.Write([]byte("Successfully logged out.\n"))
w.Write([]byte("Successfully logged out.\n"))
}
func profile(rw *gmi.ResponseWriter, req *gmi.Request) {
gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
func profile(w *gmi.ResponseWriter, r *gmi.Request) {
gmi.WithCertificate(w, r, func(cert *x509.Certificate) {
session, ok := getSession(cert)
if !ok {
gmi.CertificateNotAuthorized(rw, req)
gmi.CertificateNotAuthorized(w, r)
return
}
user := logins[session.username]
profile := fmt.Sprintf("Username: %s\nAdmin: %t\n=> /logout Logout", session.username, user.admin)
rw.Write([]byte(profile))
w.Write([]byte(profile))
})
}
func admin(rw *gmi.ResponseWriter, req *gmi.Request) {
gmi.WithCertificate(rw, req, func(cert *x509.Certificate) {
func admin(w *gmi.ResponseWriter, r *gmi.Request) {
gmi.WithCertificate(w, r, func(cert *x509.Certificate) {
session, ok := getSession(cert)
if !ok {
gmi.CertificateNotAuthorized(rw, req)
gmi.CertificateNotAuthorized(w, r)
return
}
user := logins[session.username]
if !user.admin {
gmi.CertificateNotAuthorized(rw, req)
gmi.CertificateNotAuthorized(w, r)
return
}
rw.Write([]byte("Welcome to the admin portal.\n"))
w.Write([]byte("Welcome to the admin portal.\n"))
})
}

10
fs.go
View File

@ -24,19 +24,19 @@ type fsHandler struct {
FS
}
func (fsh fsHandler) Serve(rw *ResponseWriter, req *Request) {
path := path.Clean(req.URL.Path)
func (fsh fsHandler) Serve(w *ResponseWriter, r *Request) {
path := path.Clean(r.URL.Path)
f, err := fsh.Open(path)
if err != nil {
NotFound(rw, req)
NotFound(w, r)
return
}
// Detect mimetype
ext := filepath.Ext(path)
mimetype := mime.TypeByExtension(ext)
rw.SetMimetype(mimetype)
w.SetMimetype(mimetype)
// Copy file to response writer
io.Copy(rw, f)
io.Copy(w, f)
}
// TODO: replace with io/fs.FS when available

92
server.go
View File

@ -199,7 +199,7 @@ func (r *ResponseWriter) Write(b []byte) (int, error) {
// respond responds to a connection.
func (s *Server) respond(conn net.Conn) {
r := bufio.NewReader(conn)
rw := newResponseWriter(conn)
w := newResponseWriter(conn)
// Read requested URL
rawurl, err := r.ReadString('\r')
if err != nil {
@ -209,16 +209,16 @@ func (s *Server) respond(conn net.Conn) {
if b, err := r.ReadByte(); err != nil {
return
} else if b != '\n' {
rw.WriteHeader(StatusBadRequest, "Bad request")
w.WriteHeader(StatusBadRequest, "Bad request")
}
// Trim carriage return
rawurl = rawurl[:len(rawurl)-1]
// Ensure URL is valid
if len(rawurl) > 1024 {
rw.WriteHeader(StatusBadRequest, "Bad request")
w.WriteHeader(StatusBadRequest, "Bad request")
} else if url, err := url.Parse(rawurl); err != nil || url.User != nil {
// Note that we return an error status if User is specified in the URL
rw.WriteHeader(StatusBadRequest, "Bad request")
w.WriteHeader(StatusBadRequest, "Bad request")
} else {
// Gather information about the request
req := &Request{
@ -226,14 +226,14 @@ func (s *Server) respond(conn net.Conn) {
RemoteAddr: conn.RemoteAddr(),
TLS: conn.(*tls.Conn).ConnectionState(),
}
s.handler(req).Serve(rw, req)
s.handler(req).Serve(w, req)
}
rw.w.Flush()
w.w.Flush()
conn.Close()
}
func (s *Server) handler(req *Request) Handler {
if h, ok := s.handlers[handlerKey{req.URL.Scheme, req.URL.Hostname()}]; ok {
func (s *Server) handler(r *Request) Handler {
if h, ok := s.handlers[handlerKey{r.URL.Scheme, r.URL.Hostname()}]; ok {
return h
}
return NotFoundHandler()
@ -246,24 +246,24 @@ type Handler interface {
}
// Input responds to the request with a request for input using the given prompt.
func Input(rw *ResponseWriter, req *Request, prompt string) {
rw.WriteHeader(StatusInput, prompt)
func Input(w *ResponseWriter, r *Request, prompt string) {
w.WriteHeader(StatusInput, prompt)
}
// InputHandler returns a simple handler that responds to each request with
// a request for input.
func InputHandler(prompt string) Handler {
return HandlerFunc(func(rw *ResponseWriter, req *Request) {
Input(rw, req, prompt)
return HandlerFunc(func(w *ResponseWriter, r *Request) {
Input(w, r, prompt)
})
}
// WithInput either responds to the request with StatusInput if no input
// is provided, or calls f with the input when provided.
func WithInput(rw *ResponseWriter, req *Request, prompt string, f func(string)) {
input := req.URL.RawQuery
func WithInput(w *ResponseWriter, r *Request, prompt string, f func(string)) {
input := r.URL.RawQuery
if input == "" {
Input(rw, req, prompt)
Input(w, r, prompt)
return
}
f(input)
@ -271,58 +271,58 @@ func WithInput(rw *ResponseWriter, req *Request, prompt string, f func(string))
// Sensitive responds to the request with a request for sensitive input
// using the given prompt.
func SensitiveInput(rw *ResponseWriter, req *Request, prompt string) {
rw.WriteHeader(StatusSensitiveInput, prompt)
func SensitiveInput(w *ResponseWriter, r *Request, prompt string) {
w.WriteHeader(StatusSensitiveInput, prompt)
}
// SensitiveInputHandler returns a simpler handler that responds to each request
// with a request for sensitive input.
func SensitiveInputHandler(prompt string) Handler {
return HandlerFunc(func(rw *ResponseWriter, req *Request) {
SensitiveInput(rw, req, prompt)
return HandlerFunc(func(w *ResponseWriter, r *Request) {
SensitiveInput(w, r, prompt)
})
}
// WithSensitiveInput either responds to the request with StatusSensitiveInput
// if no input is provided, or calls f with the input when provided.
func WithSensitiveInput(rw *ResponseWriter, req *Request, prompt string, f func(string)) {
input := req.URL.RawQuery
func WithSensitiveInput(w *ResponseWriter, r *Request, prompt string, f func(string)) {
input := r.URL.RawQuery
if input == "" {
SensitiveInput(rw, req, prompt)
SensitiveInput(w, r, prompt)
return
}
f(input)
}
// Redirect replies to the request with a redirect to the given URL.
func Redirect(rw *ResponseWriter, req *Request, url string) {
rw.WriteHeader(StatusRedirect, url)
func Redirect(w *ResponseWriter, r *Request, url string) {
w.WriteHeader(StatusRedirect, url)
}
// RedirectHandler returns a simple handler that responds to each request with
// a redirect to the given URL.
func RedirectHandler(url string) Handler {
return HandlerFunc(func(rw *ResponseWriter, req *Request) {
Redirect(rw, req, url)
return HandlerFunc(func(w *ResponseWriter, r *Request) {
Redirect(w, r, url)
})
}
// PermanentRedirect replies to the request with a permanent redirect to the given URL.
func PermanentRedirect(rw *ResponseWriter, req *Request, url string) {
rw.WriteHeader(StatusRedirectPermanent, url)
func PermanentRedirect(w *ResponseWriter, r *Request, url string) {
w.WriteHeader(StatusRedirectPermanent, url)
}
// PermanentRedirectHandler returns a simple handler that responds to each request with
// a redirect to the given URL.
func PermanentRedirectHandler(url string) Handler {
return HandlerFunc(func(rw *ResponseWriter, req *Request) {
PermanentRedirect(rw, req, url)
return HandlerFunc(func(w *ResponseWriter, r *Request) {
PermanentRedirect(w, r, url)
})
}
// NotFound replies to the request with the NotFound status code.
func NotFound(rw *ResponseWriter, req *Request) {
rw.WriteHeader(StatusNotFound, "Not found")
func NotFound(w *ResponseWriter, r *Request) {
w.WriteHeader(StatusNotFound, "Not found")
}
// NotFoundHandler returns a simple handler that responds to each request with
@ -332,8 +332,8 @@ func NotFoundHandler() Handler {
}
// Gone replies to the request with the Gone status code.
func Gone(rw *ResponseWriter, req *Request) {
rw.WriteHeader(StatusGone, "Gone")
func Gone(w *ResponseWriter, r *Request) {
w.WriteHeader(StatusGone, "Gone")
}
// GoneHandler returns a simple handler that responds to each request with
@ -344,24 +344,24 @@ func GoneHandler() Handler {
// CertificateRequired responds to the request with the CertificateRequired
// status code.
func CertificateRequired(rw *ResponseWriter, req *Request) {
rw.WriteHeader(StatusCertificateRequired, "Certificate required")
func CertificateRequired(w *ResponseWriter, r *Request) {
w.WriteHeader(StatusCertificateRequired, "Certificate required")
}
// CertificateNotAuthorized responds to the request with
// the CertificateNotAuthorized status code.
func CertificateNotAuthorized(rw *ResponseWriter, req *Request) {
rw.WriteHeader(StatusCertificateNotAuthorized, "Certificate not authorized")
func CertificateNotAuthorized(w *ResponseWriter, r *Request) {
w.WriteHeader(StatusCertificateNotAuthorized, "Certificate not authorized")
}
// WithCertificate either responds with CertificateRequired if the client did
// not provide a certificate, or calls f with the first ceritificate provided.
func WithCertificate(rw *ResponseWriter, req *Request, f func(*x509.Certificate)) {
if len(req.TLS.PeerCertificates) == 0 {
CertificateRequired(rw, req)
func WithCertificate(w *ResponseWriter, r *Request, f func(*x509.Certificate)) {
if len(r.TLS.PeerCertificates) == 0 {
CertificateRequired(w, r)
return
}
cert := req.TLS.PeerCertificates[0]
cert := r.TLS.PeerCertificates[0]
f(cert)
}
@ -369,16 +369,16 @@ func WithCertificate(rw *ResponseWriter, req *Request, f func(*x509.Certificate)
// clients if they did not provide one, and calls f with the first certificate
// if they did.
func CertificateHandler(f func(*x509.Certificate)) Handler {
return HandlerFunc(func(rw *ResponseWriter, req *Request) {
WithCertificate(rw, req, f)
return HandlerFunc(func(w *ResponseWriter, r *Request) {
WithCertificate(w, r, f)
})
}
// HandlerFunc is a wrapper around a bare function that implements Handler.
type HandlerFunc func(*ResponseWriter, *Request)
func (f HandlerFunc) Serve(rw *ResponseWriter, req *Request) {
f(rw, req)
func (f HandlerFunc) Serve(w *ResponseWriter, r *Request) {
f(w, r)
}
// The following code is modified from the net/http package.