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Merge pull request #2 from kazeburo/refactor-package
devide to 3 pkgs
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,216 @@ | ||
package handler | ||
|
||
import ( | ||
"fmt" | ||
"io" | ||
"net" | ||
"net/http" | ||
"time" | ||
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"github.com/gorilla/mux" | ||
"github.com/gorilla/websocket" | ||
"github.com/kazeburo/wsgate-server/mapping" | ||
"github.com/kazeburo/wsgate-server/publickey" | ||
"go.uber.org/zap" | ||
) | ||
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// Handler handlers | ||
type Handler struct { | ||
logger *zap.Logger | ||
upgrader websocket.Upgrader | ||
dialTimeout time.Duration | ||
writeTimeout time.Duration | ||
mp *mapping.Mapping | ||
pk *publickey.Publickey | ||
} | ||
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// New new handler | ||
func New( | ||
handshakeTimeout time.Duration, | ||
dialTimeout time.Duration, | ||
writeTimeout time.Duration, | ||
mp *mapping.Mapping, | ||
pk *publickey.Publickey, | ||
logger *zap.Logger) (*Handler, error) { | ||
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upgrader := websocket.Upgrader{ | ||
ReadBufferSize: 1024, | ||
WriteBufferSize: 1024, | ||
HandshakeTimeout: handshakeTimeout, | ||
CheckOrigin: func(r *http.Request) bool { | ||
return true | ||
}, | ||
} | ||
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return &Handler{ | ||
logger: logger, | ||
upgrader: upgrader, | ||
dialTimeout: dialTimeout, | ||
writeTimeout: writeTimeout, | ||
mp: mp, | ||
pk: pk, | ||
}, nil | ||
} | ||
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// Hello hello handler | ||
func (h *Handler) Hello() func(w http.ResponseWriter, r *http.Request) { | ||
return func(w http.ResponseWriter, r *http.Request) { | ||
w.Write([]byte("OK\n")) | ||
} | ||
} | ||
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// Proxy proxy handler | ||
func (h *Handler) Proxy() func(w http.ResponseWriter, r *http.Request) { | ||
return func(w http.ResponseWriter, r *http.Request) { | ||
vars := mux.Vars(r) | ||
proxyDest := vars["dest"] | ||
upstream := "" | ||
readLen := int64(0) | ||
writeLen := int64(0) | ||
hasError := false | ||
disconnectAt := "" | ||
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logger := h.logger.With( | ||
zap.String("user-email", r.Header.Get("X-Goog-Authenticated-User-Email")), | ||
zap.String("x-forwarded-for", r.Header.Get("X-Forwarded-For")), | ||
zap.String("remote-addr", r.RemoteAddr), | ||
zap.String("destination", proxyDest), | ||
) | ||
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if h.pk.Enabled() { | ||
_, err := h.pk.Verify(r.Header.Get("Authorization")) | ||
if err != nil { | ||
logger.Warn("No authorize", zap.Error(err)) | ||
http.Error(w, err.Error(), http.StatusUnauthorized) | ||
return | ||
} | ||
} | ||
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upstream, ok := h.mp.Get(proxyDest) | ||
if !ok { | ||
hasError = true | ||
logger.Warn("No map found") | ||
http.Error(w, fmt.Sprintf("Not found: %s", proxyDest), 404) | ||
return | ||
} | ||
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logger = logger.With(zap.String("upstream", upstream)) | ||
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s, err := net.DialTimeout("tcp", upstream, h.dialTimeout) | ||
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if err != nil { | ||
hasError = true | ||
logger.Warn("DialTimeout", zap.Error(err)) | ||
http.Error(w, fmt.Sprintf("Could not connect upstream: %v", err), 500) | ||
return | ||
} | ||
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conn, err := h.upgrader.Upgrade(w, r, nil) | ||
if err != nil { | ||
hasError = true | ||
s.Close() | ||
logger.Warn("Failed to Upgrade", zap.Error(err)) | ||
return | ||
} | ||
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logger.Info("log", zap.String("status", "Connected")) | ||
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defer func() { | ||
status := "Suceeded" | ||
if hasError { | ||
status = "Failed" | ||
} | ||
logger.Info("log", | ||
zap.String("status", status), | ||
zap.Int64("read", readLen), | ||
zap.Int64("write", writeLen), | ||
zap.String("disconnect_at", disconnectAt), | ||
) | ||
}() | ||
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doneCh := make(chan bool) | ||
goClose := false | ||
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// websocket -> server | ||
go func() { | ||
defer func() { doneCh <- true }() | ||
for { | ||
mt, r, err := conn.NextReader() | ||
if websocket.IsCloseError(err, | ||
websocket.CloseNormalClosure, // Normal. | ||
websocket.CloseAbnormalClosure, // OpenSSH killed proxy client. | ||
) { | ||
return | ||
} | ||
if err != nil { | ||
if !goClose { | ||
logger.Warn("NextReader", zap.Error(err)) | ||
hasError = true | ||
} | ||
if disconnectAt == "" { | ||
disconnectAt = "client_nextreader" | ||
} | ||
return | ||
} | ||
if mt != websocket.BinaryMessage { | ||
logger.Warn("BinaryMessage required", zap.Int("messageType", mt)) | ||
hasError = true | ||
return | ||
} | ||
n, err := io.Copy(s, r) | ||
if err != nil { | ||
if !goClose { | ||
logger.Warn("Reading from websocket", zap.Error(err)) | ||
hasError = true | ||
} | ||
if disconnectAt == "" { | ||
disconnectAt = "client_upstream_copy" | ||
} | ||
return | ||
} | ||
readLen += n | ||
} | ||
}() | ||
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// server -> websocket | ||
go func() { | ||
defer func() { doneCh <- true }() | ||
for { | ||
b := make([]byte, 64*1024) | ||
n, err := s.Read(b) | ||
if err != nil { | ||
if !goClose && err != io.EOF { | ||
logger.Warn("Reading from dest", zap.Error(err)) | ||
hasError = true | ||
} | ||
if disconnectAt == "" { | ||
disconnectAt = "upstream_read" | ||
} | ||
return | ||
} | ||
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b = b[:n] | ||
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if err := conn.WriteMessage(websocket.BinaryMessage, b); err != nil { | ||
if !goClose { | ||
logger.Warn("WriteMessage", zap.Error(err)) | ||
hasError = true | ||
} | ||
if disconnectAt == "" { | ||
disconnectAt = "client_write" | ||
} | ||
return | ||
} | ||
writeLen += int64(n) | ||
} | ||
}() | ||
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<-doneCh | ||
goClose = true | ||
s.Close() | ||
conn.Close() | ||
<-doneCh | ||
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} | ||
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} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,51 @@ | ||
package mapping | ||
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import ( | ||
"bufio" | ||
"os" | ||
"regexp" | ||
"strings" | ||
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"github.com/pkg/errors" | ||
"go.uber.org/zap" | ||
) | ||
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// Mapping struct | ||
type Mapping struct { | ||
m map[string]string | ||
} | ||
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// New new mapping | ||
func New(mapFile string, logger *zap.Logger) (*Mapping, error) { | ||
r := regexp.MustCompile(`^ *#`) | ||
m := make(map[string]string) | ||
if mapFile != "" { | ||
f, err := os.Open(mapFile) | ||
if err != nil { | ||
return nil, errors.Wrap(err, "Failed to open mapFile") | ||
} | ||
s := bufio.NewScanner(f) | ||
for s.Scan() { | ||
if r.MatchString(s.Text()) { | ||
continue | ||
} | ||
l := strings.SplitN(s.Text(), ",", 2) | ||
if len(l) != 2 { | ||
return nil, errors.Wrapf(err, "Invalid line: %s", s.Text()) | ||
} | ||
logger.Info("Created map", | ||
zap.String("from", l[0]), | ||
zap.String("to", l[1])) | ||
m[l[0]] = l[1] | ||
} | ||
} | ||
return &Mapping{ | ||
m: m, | ||
}, nil | ||
} | ||
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// Get get mapping | ||
func (mp *Mapping) Get(proxyDest string) (string, bool) { | ||
upstream, ok := mp.m[proxyDest] | ||
return upstream, ok | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,65 @@ | ||
package publickey | ||
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import ( | ||
"crypto/rsa" | ||
"fmt" | ||
"io/ioutil" | ||
"strings" | ||
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jwt "github.com/dgrijalva/jwt-go" | ||
"github.com/pkg/errors" | ||
"go.uber.org/zap" | ||
) | ||
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// Publickey struct | ||
type Publickey struct { | ||
publicKeyFile string | ||
verifyKey *rsa.PublicKey | ||
} | ||
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// New publickey reader/checker | ||
func New(publicKeyFile string, logger *zap.Logger) (*Publickey, error) { | ||
var verifyKey *rsa.PublicKey | ||
if publicKeyFile != "" { | ||
verifyBytes, err := ioutil.ReadFile(publicKeyFile) | ||
if err != nil { | ||
return nil, errors.Wrap(err, "Failed read pubkey") | ||
} | ||
verifyKey, err = jwt.ParseRSAPublicKeyFromPEM(verifyBytes) | ||
if err != nil { | ||
return nil, errors.Wrap(err, "Failed parse pubkey") | ||
} | ||
} | ||
return &Publickey{ | ||
publicKeyFile: publicKeyFile, | ||
verifyKey: verifyKey, | ||
}, nil | ||
} | ||
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// Enabled publickey is enabled | ||
func (pk Publickey) Enabled() bool { | ||
return pk.publicKeyFile != "" | ||
} | ||
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// Verify verify auth header | ||
func (pk Publickey) Verify(t string) (bool, error) { | ||
if t == "" { | ||
return false, fmt.Errorf("no tokenString") | ||
} | ||
t = strings.TrimPrefix(t, "Bearer ") | ||
claims := &jwt.StandardClaims{} | ||
token, err := jwt.ParseWithClaims(t, claims, func(token *jwt.Token) (interface{}, error) { | ||
return pk.verifyKey, nil | ||
}) | ||
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if err != nil { | ||
return false, fmt.Errorf("Token is invalid: %v", err) | ||
} | ||
if !token.Valid { | ||
return false, fmt.Errorf("Token is invalid") | ||
} | ||
if claims.Valid() != nil { | ||
return false, fmt.Errorf("Invalid claims: %v", claims.Valid()) | ||
} | ||
return true, nil | ||
} |
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