added request body reader

internal/http/errors.go

@@ -1,5 +1,16 @@
 package http
 
+import "errors"
+
+// Usage:
+//
+//	err := conn.ReadRequest() / CreateResponse()
+//	if httpErr, ok := errors.AsType[*http.HttpError](err); ok {
+//		// Request is malformed, socket buffer contains unread garbage data.
+//		// Send error code and close connection.
+//	} else {
+//		// something bad happened with the connection, just close it
+//	}
 type HttpError struct {
 	Status StatusCode
 	Msg    string
@@ -12,3 +23,35 @@ func (e *HttpError) Error() string {
 func NewHttpError(code StatusCode, msg string) *HttpError {
 	return &HttpError{Status: code, Msg: msg}
 }
+
+var ErrHasUnreadBody = NewHttpError(StatusRequestEntityTooLarge,
+	"can't read new request, body of previous request wasn't read")
+
+var ErrBodyHasBeenAlreadyRead = errors.New(
+	"request body has already been read")
+
+var ErrTransferEncodingNotSupported = NewHttpError(StatusBadRequest,
+	"header transfer-encoding is not supported")
+
+var ErrLineEndNotFound = NewHttpError(StatusBadRequest,
+	"line end not found")
+
+var ErrHeadersTooLarge = NewHttpError(StatusRequestHeaderFieldsTooLarge,
+	"headers too large")
+
+var ErrNotHttpRequest = NewHttpError(StatusBadRequest,
+	"not HTTP request")
+
+var ErrProtocolNotSupported = NewHttpError(StatusHTTPVersionNotSupported,
+	"request protocol not supported")
+
+var ErrUnsafeRequestPath = NewHttpError(StatusForbidden,
+	"unsafe request path")
+
+var ErrLineNotHeader = NewHttpError(StatusBadRequest,
+	"not a header line")
+
+var ErrHeaderNameStartsOrEndsWithSpace = NewHttpError(StatusBadRequest,
+	"header name must not start or end with space")
+
+var ErrHeaderKeyOrValueHasCRLF = errors.New("response header key or value contains CR or LF")