more errors

internal/metrics/metrics.go

@@ -70,6 +70,7 @@ const (
 	errReadConnReset     = "read_conn_reset"
 	errWriteConnReset    = "write_conn_reset"
 	errReadConnTimedOut  = "read_conn_timed_out"
+	errWriteConnTimedOut = "write_conn_timed_out"
 	errWriteBrokenPipe   = "write_broken_pipe"
 	errEPipe             = "e_pipe"
 	errETimedout         = "e_timedout"
@@ -80,6 +81,8 @@ const (
 	errBlobTooBig        = "blob_too_big"
 	errDeadlineExceeded  = "deadline_exceeded"
 	errHashMismatch      = "hash_mismatch"
+	errZeroByteBlob      = "zero_byte_blob"
+	errInvalidCharacter  = "invalid_character"
 	errOther             = "other"
 )
 
@@ -130,6 +133,8 @@ func TrackError(direction string, e error) (shouldLog bool) { // shouldLog is a
 	} else if strings.Contains(err.Error(), "read: connection timed out") { // the other side closed the connection using TCP reset
 		//log.Warnln("read conn timed out is not the same as ETIMEDOUT")
 		errType = errReadConnTimedOut
+	} else if strings.Contains(err.Error(), "write: connection timed out") {
+		errType = errWriteConnTimedOut
 	} else if errors.Is(e, io.ErrUnexpectedEOF) {
 		errType = errUnexpectedEOF
 	} else if strings.Contains(err.Error(), "unexpected EOF") { // tried to read from closed pipe or socket
@@ -146,6 +151,10 @@ func TrackError(direction string, e error) (shouldLog bool) { // shouldLog is a
 		errType = errBlobTooBig
 	} else if strings.Contains(err.Error(), "hash of received blob data does not match hash from send request") {
 		errType = errHashMismatch
+	} else if strings.Contains(err.Error(), "0-byte blob received") {
+		errType = errZeroByteBlob
+	} else if strings.Contains(err.Error(), "invalid character") {
+		errType = errInvalidCharacter
 	} else if _, ok := e.(*json.SyntaxError); ok {
 		errType = errJSONSyntax
 	} else {