feat(a2a): Implement A2A HTTP transport for server mode #10921

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opened 2026-04-28 20:40:33 +00:00 by HAL9000 · 1 comment

HAL9000 commented

2026-04-28 20:40:33 +00:00

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Implementation

Implement the A2A HTTP transport for server mode, replacing the current stub in transport.py with a working implementation that:

Sends A2aRequest objects as HTTP POST requests over HTTPS
Receives A2aResponse objects from the server
Supports TLS certificate verification
Handles JSON-RPC 2.0 error responses
Properly maps domain errors via map_domain_error
Supports connection lifecycle (connect, send, disconnect)
Returns connection status via is_connected

The existing A2aHttpTransport stub raises A2aNotAvailableError on every invocation. This task replaces that stub with a real implementation using a standard HTTP client (e.g. httpx or requests).

Acceptance Criteria

connect(base_url) opens an HTTP connection with optional TLS
send(request) POSTs the serialized A2aRequest and returns A2aResponse
disconnect() properly closes the connection
is_connected() reflects actual connection state
All error paths return proper A2aResponse with A2aErrorDetail
Domain errors are mapped via map_domain_error
Fully typed, tested, and passes all quality gates

## Implementation Implement the A2A HTTP transport for server mode, replacing the current stub in ``transport.py`` with a working implementation that: 1. Sends ``A2aRequest`` objects as HTTP POST requests over HTTPS 2. Receives ``A2aResponse`` objects from the server 3. Supports TLS certificate verification 4. Handles JSON-RPC 2.0 error responses 5. Properly maps domain errors via ``map_domain_error`` 6. Supports connection lifecycle (connect, send, disconnect) 7. Returns connection status via ``is_connected`` The existing ``A2aHttpTransport`` stub raises ``A2aNotAvailableError`` on every invocation. This task replaces that stub with a real implementation using a standard HTTP client (e.g. httpx or requests). ## Acceptance Criteria - [ ] ``connect(base_url)`` opens an HTTP connection with optional TLS - [ ] ``send(request)`` POSTs the serialized A2aRequest and returns A2aResponse - [ ] ``disconnect()`` properly closes the connection - [ ] ``is_connected()`` reflects actual connection state - [ ] All error paths return proper ``A2aResponse`` with ``A2aErrorDetail`` - [ ] Domain errors are mapped via ``map_domain_error`` - [ ] Fully typed, tested, and passes all quality gates

HAL9000 commented

2026-05-11 02:37:52 +00:00

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Implemented in MR !11113

The A2A HTTP transport stub has been replaced with a full implementation supporting:

HTTPS connections with configurable TLS certificate verification
JSON-RPC 2.0 request/response serialization over HTTP POST
Error handling for HTTP status codes (4xx/5xx) with structured error mapping
JWT Bearer token authentication
Proper connection lifecycle management

## Implemented in MR !11113 The A2A HTTP transport stub has been replaced with a full implementation supporting: - HTTPS connections with configurable TLS certificate verification - JSON-RPC 2.0 request/response serialization over HTTP POST - Error handling for HTTP status codes (4xx/5xx) with structured error mapping - JWT Bearer token authentication - Proper connection lifecycle management