Object Stream
Stream operation object, used for binary data stream reading and writing
Stream is the basic object used to define standard interfaces for stream processing and cannot be created independently
inheritance relationship
Member properties
fd
Integer, query the file descriptor value corresponding to Stream, implemented by subclasses
1readonly Integer Stream.fd;
member function
read
Read data of specified size from the stream
1Buffer Stream.read(Integer bytes = -1) async;
Call parameters:
- bytes: Integer, specify the amount of data to be read, the default is to read a random size data block, the size of the data read depends on the device
Return result:
- Buffer, returns the data read from the stream, or null if there is no data to read or the connection is interrupted
write
Write the given data to the stream
1Stream.write(Buffer data) async;
Call parameters:
- data:Buffer, given the data to write
flush
Write file buffer contents to physical device
1Stream.flush() async;
close
closes the current stream object
1Stream.close() async;
copyTo
Copy stream data to target stream
1
2Long Stream.copyTo(Stream stm,
Long bytes = -1) async;
Call parameters:
- stm: Stream, target stream object
- bytes: Long, number of bytes copied
Return result:
- Long, returns the number of bytes copied
toString
Returns the string representation of the object, generally returns "[Native Object]", the object can be reimplemented according to its own characteristics
1String Stream.toString();
Return result:
- String, returns the string representation of the object
toJSON
Returns the JSON format representation of the object, generally returns the set of readable properties defined by the object
1Value Stream.toJSON(String key = "");
Call parameters:
- key: String, unused
Return result:
- Value, returns a value containing JSON serializable