net/ghttp: add Streamable HTTP support

[gqcn]

Is your feature request related to a problem?

Option Yes

Describe the solution you'd like

Streamable HTTP is a data transmission method based on the HTTP protocol. It allows data to be transmitted between the client and the server in the form of a stream, rather than transmitting the entire data all at once. The following are its main features and advantages:

Features

• Based on the Standard HTTP Protocol: Streamable HTTP is compatible with existing HTTP infrastructure, such as CDNs, API gateways, and load balancers.
• Supports Streaming Transmission: Data can be divided into multiple small chunks and transmitted one by one. The client can start processing as soon as it receives the first data chunk without having to wait for the entire data to be transmitted.
• Flexible Two-way Communication: Compared with the traditional Server-Sent Events (SSE), Streamable HTTP supports more flexible two-way communication.
• Supports Stateless Servers: The server can choose to run completely statelessly without the need to maintain long-term connections.

Advantages

• Higher Performance: Especially in scenarios with high concurrency, Streamable HTTP can transmit data more efficiently.
• Easier Deployment: Developers do not need to set up and maintain a specific SSE server, simplifying the deployment process.
• Better Compatibility: It is suitable for various network infrastructure, reducing the difficulty of cross-platform and cross-system integration.
• Optimized User Experience: Through streaming transmission, the client can start processing and displaying data more quickly, reducing the user's waiting time.

Application Scenarios

Streamable HTTP has significant advantages in the following scenarios:

• Real-time Data Analysis and Visualization: It can transmit data in a timely and efficient manner, supporting quick decision-making.
• Applications of High-performance Language Models: It can improve the speed and performance of user interaction with large language models.
• Next-generation Intelligent Agents: For general-purpose AI agents such as Manus AI, which have extremely high requirements for response speed and data transmission efficiency, Streamable HTTP can provide a smoother and more stable data channel.

Describe alternatives you've considered

Streamable HTTP has recently been applied in the Model Context Protocol (MCP) open-sourced by Anthropic to replace the traditional HTTP+SSE solution, addressing the efficiency bottleneck that occurs in scenarios with high concurrency and real-time requirements.

Additional

No response