HTTP 2.0
API Gateway supports HTTP/2, which is a major revision of HTTP and was originally named HTTP 2.0. It provides binary encoding, request multiplexing over a single connection, and request header compression, improving transmission performance and throughput with a lower latency.
- HTTP 2.0 strongly depends on network stability. To use HTTP 2.0, ensure that your network is stable and your client supports this protocol.
- Only dedicated gateways created after June 22, 2022 support HTTP 2.0. To use this protocol, contact technical support.
- Binary encoding
Unlike HTTP 1.x where data is transmitted in text format, data in HTTP 2.0 is split into messages and frames for binary encoding. Compared with string (text) parsing, binary parsing is easier and less error-prone and delivers higher transmission performance.
- Multiplexing
With binary encoding, HTTP 2.0 no longer relies on multiple connections to process and send requests and responses concurrently.
For the same domain name, all requests are completed on a single connection, and each connection can process any number of messages. A message consists of one or more frames, which can be sent out of order and finally recombined based on the stream ID in the header of each frame. This shortens the latency and improves the efficiency.
- Header compression
HTTP 2.0 uses an encoder to reduce the size of the headers to transmit. Both the client and server store a header field table to avoid transmitting same headers repeatedly, achieving high throughput.
