fix golint issues in rest (#529)

rest/httpx/requests.go

@@ -60,6 +60,7 @@ func ParseForm(r *http.Request, v interface{}) error {
 	return formUnmarshaler.Unmarshal(params, v)
 }
 
+// ParseHeader parses the request header and returns a map.
 func ParseHeader(headerValue string) map[string]string {
 	ret := make(map[string]string)
 	fields := strings.Split(headerValue, separator)

rest/httpx/responses.go

@@ -13,6 +13,7 @@ var (
 	lock         sync.RWMutex
 )
 
+// Error writes err into w.
 func Error(w http.ResponseWriter, err error) {
 	lock.RLock()
 	handler := errorHandler
@@ -32,20 +33,24 @@ func Error(w http.ResponseWriter, err error) {
 	}
 }
 
+// Ok writes HTTP 200 OK into w.
 func Ok(w http.ResponseWriter) {
 	w.WriteHeader(http.StatusOK)
 }
 
+// OkJson writes v into w with 200 OK.
 func OkJson(w http.ResponseWriter, v interface{}) {
 	WriteJson(w, http.StatusOK, v)
 }
 
+// SetErrorHandler sets the error handler, which is called on calling Error.
 func SetErrorHandler(handler func(error) (int, interface{})) {
 	lock.Lock()
 	defer lock.Unlock()
 	errorHandler = handler
 }
 
+// WriteJson writes v as json string into w with code.
 func WriteJson(w http.ResponseWriter, code int, v interface{}) {
 	w.Header().Set(ContentType, ApplicationJson)
 	w.WriteHeader(code)

rest/httpx/router.go

@@ -2,6 +2,7 @@ package httpx
 
 import "net/http"
 
+// Router interface represents a http router that handles http requests.
 type Router interface {
 	http.Handler
 	Handle(method string, path string, handler http.Handler) error

rest/httpx/vars.go

@@ -1,19 +1,31 @@
 package httpx
 
 const (
+	// ApplicationJson means application/json.
 	ApplicationJson = "application/json"
+	// ContentEncoding means Content-Encoding.
 	ContentEncoding = "Content-Encoding"
+	// ContentSecurity means X-Content-Security.
 	ContentSecurity = "X-Content-Security"
-	ContentType     = "Content-Type"
-	KeyField        = "key"
-	SecretField     = "secret"
-	TypeField       = "type"
-	CryptionType    = 1
+	// ContentType means Content-Type.
+	ContentType = "Content-Type"
+	// KeyField means key.
+	KeyField = "key"
+	// SecretField means secret.
+	SecretField = "secret"
+	// TypeField means type.
+	TypeField = "type"
+	// CryptionType means cryption.
+	CryptionType = 1
 )
 
 const (
+	// CodeSignaturePass means signature verification passed.
 	CodeSignaturePass = iota
+	// CodeSignatureInvalidHeader means invalid header in signature.
 	CodeSignatureInvalidHeader
+	// CodeSignatureWrongTime means wrong timestamp in signature.
 	CodeSignatureWrongTime
+	// CodeSignatureInvalidToken means invalid token in signature.
 	CodeSignatureInvalidToken
 )