getWriteHeadersSize method
获取表头长度
Implementation
int getWriteHeadersSize(Map<String, String> headers) {
if (headers.isEmpty) {
return 0;
}
int len = 10;
for (var header in headers.entries) {
len += 10;
len += header.key.length;
len += header.value.length;
}
return len;
}