When a Forward implementation already wrote a complete non-SSE (JSON) error
response to the client and returned an error -- e.g. the case-400 passthrough
in GatewayService.handleErrorResponse -- the handler unconditionally called
ensureForwardErrorResponse, which detected the writer was already written and
appended a fallback `data: {"type":"error",...}` SSE frame. The client then
received a corrupted body: the upstream JSON immediately followed by a stray
`data:` line.
Add gatewayForwardErrorAlreadyCommunicated (and the OpenAI counterpart) to
detect this case -- writer size changed AND Content-Type is not
text/event-stream -- and skip the fallback. SSE streams that only flushed
keepalive pings or partial data still receive a protocol-compliant terminal
frame, so strict SDKs (Codex CLI) do not see a silent EOF.
Applied consistently across the Messages / ChatCompletions / Responses
gateway handlers and the OpenAI chat/images handlers. Added regression tests
covering JSON passthrough, mid-stream SSE 400, nil-error and no-write cases.
- Add int64(0) param to SelectAccountWithLoadAwareness callers (signature change from channel scheduling refactor)
- Add UsageMapHook type and struct field to StreamingProcessor
- Revert Claude Max cache billing code to upstream/main (not part of channel feature)
- Revert credits overages logic to upstream/main (non-channel change)
- Remove Instructions field reference (non-channel OpenAI feature)
- Restore sora_client_handler_test.go from upstream + add channel service nil params
- Fix 7 stale comments still mentioning "限制检查" in handlers/services
- Make billingModelForRestriction explicitly list channel_mapped case
- Add slog.Warn for error swallowing in ResolveChannelMapping and
needsUpstreamChannelRestrictionCheck
- Document sticky session upstream check exemption
Move the model pricing restriction check from 8 handler entry points
to the account scheduling phase (SelectAccountForModelWithExclusions /
SelectAccountWithLoadAwareness), aligning restriction with billing:
- requested: check original request model against pricing list
- channel_mapped: check channel-mapped model against pricing list
- upstream: per-account check using account-mapped model
Handler layer now only resolves channel mapping (no restriction).
Scheduling layer performs pre-check for requested/channel_mapped,
and per-account filtering for upstream billing source.
New HTTP handlers for Anthropic platform groups accepting OpenAI-format
endpoints:
- GatewayHandler.Responses: /v1/responses for non-OpenAI groups
- GatewayHandler.ChatCompletions: /v1/chat/completions for non-OpenAI groups
Both handlers include:
- Claude Code only restriction (403 reject when claude_code_only enabled,
since these endpoints are never Claude Code clients)
- Full auth → billing → user/account concurrency → failover loop
- Ops error/endpoint context propagation
- Async usage recording via worker pool
Error responses use each endpoint's native format (Responses API format
for /v1/responses, CC format for /v1/chat/completions).
mt21625457