Two webchat hardening fixes:
- Session listing no longer pulls every system-owned conversation into
memory. listSessions/pageSessions went through listConversations(owner)
whose `username IN (owner, system)` loaded all IM/cron rows just to show
one visitor's handful of threads. New listWebchatConversations(username)
queries only the visitor's own rows; the channel prefix is matched
in-memory with a literal startsWith (so a '_'/'%' in the api key's first
8 chars can't act as a LIKE wildcard).
- Upload now enforces a per-conversation quota (file count + total bytes,
both configurable) so a visitor can't fill the disk with many
individually-under-cap files. Pairs with the existing staging TTL sweep.
When webchat:<key8>:<visitorId>:<sessionId> exceeds 64 chars the
conversationId folds visitorId+sessionId into an unrecoverable hash, so
the thread fell outside listSessions' conversationId-prefix filter and its
sessionId could not be recovered — the thread was invisible and
unaddressable (common with a UUID visitorId + a >10-char sessionId).
Persist the sessionId on creation (new nullable webchat_session_id column)
and enumerate by username + channel prefix (webchat:<key8>:), which also
matches the hashed form. sessionId is read from the column, falling back to
parsing the conversationId only for legacy rows.
Adds a @SpringBootTest covering listing (incl. the hashed thread), message
pagination, session paging/search, rename, and token rejection end-to-end.
Refs matevip/mateclaw#346
Bring the webchat visitor session API closer to the admin console's:
- GET /sessions/messages gains beforeId + limit. With a limit it returns
{messages, hasMore} (latest N, then pull-up for older) using the
external path-stripped view; without it, the full list as before.
- GET /sessions/page paginates + keyword-searches a visitor's threads
(in-memory: a visitor's thread set is bounded to its own namespace).
- PUT /sessions/title renames a thread (1-100 chars).
All keep the webchat auth model (API key + visitor token, server-derived
conversationId, ownership guard). Message views go through the shared
toExternalMessageViews helper so the paginated path is sanitized too.
Refs matevip/mateclaw#346
WebChat had no file support: the /stream body carried only text, and
agent-produced files had no visitor-reachable download path (the JWT
/chat/files endpoint is unreachable for API-key visitors).
Add webchat-authenticated file transfer, reusing MessageContentPart +
the existing upload dir + agent multimodal injection:
- WebChatFileService: validate (size cap, extension whitelist, filename
sanitize), store under the conversation's upload dir, stage by opaque
fileId, traversal-safe resolve. Untrusted-uploader hardening lives here.
- POST /upload (multipart) and GET /files, both authed by API key +
visitor token with a server-derived conversationId (never client paths).
Downloads send non-images as attachment + X-Content-Type-Options:nosniff.
- /stream gains attachmentIds; the server resolves each id from the
staging registry (client metadata is never trusted), builds parts, and
persists them on the user message so the agent's multimodal/file tools
pick them up from history — same path as the JWT web chat.
- Strip server-side file paths from the visitor-facing message view
(listMessageViewsExternal + includePath flag) so the filesystem layout
is not disclosed.
Refs matevip/mateclaw#342
The webchat conversationId (webchat:<key8>:<visitorId>[:<sessionId>]) and the
derived username (webchat:<visitorId>) are written to VARCHAR(64) columns, but
visitorId had no validation and sessionId allows 64 chars — so a long visitorId,
or a legitimate 64-char sessionId, overflows the column and the getOrCreateConversation
INSERT throws (500 on /stream). Validate visitorId (charset + blank->UUID) and
fold the variable part into a stable hash when the derived id/username would
exceed 64 chars, keeping short ids byte-identical (backward compatible). Also
make listSessions filter on exact owner username, not just the conversationId
prefix, so system-owned rows can never leak via a crafted visitorId. Adds
boundary regression tests.
Add per-visitor session management for the WebChat Web/API access mode:
list a visitor's conversation threads, fetch a thread's messages, and
delete a thread.
Authorization: visitorId is a client-asserted request param, so it cannot
be trusted on its own — deriving conversationId from it and then checking
ownership against it is tautological (any caller passes). Instead, /stream
issues a per-visitor token = HMAC-SHA256(jwtSecret, channelId:visitorId),
returned in the meta event; the management endpoints require it back via
the X-MC-Visitor-Token header and verify it in constant time. The signing
secret is server-only (unlike the public channel API key) and the channelId
in the payload makes tokens non-portable across channels.
Includes regression tests for token issuance/verification semantics
(forged visitorId rejected, cross-visitor and cross-channel tokens rejected,
tampered tokens rejected).
The WebChat stream endpoint resolves agentId only when the
(visitorId + sessionId) conversation is first created; later requests
with a different agentId reuse the existing conversation's agent and
silently ignore the new value. Document this on WebChatRequest.agentId
so integrators know to use a new sessionId to reach another agent.
Rename the webchat channel from "embed widget" to "Web / API access" (key
unchanged, docs/i18n only) and extend the backend SSE endpoint for pure
backend integration:
- WebChatRequest gains optional agentId (route one Key to multiple agents;
rejected unless the agent shares the channel's workspace) and sessionId
(one visitor, multiple isolated threads).
- sessionId is validated ([A-Za-z0-9_-]{1,64}) and only composed into the
server-derived conversationId — raw conversationIds are never accepted, so
the key+visitor namespace still bounds every thread.
- A `meta` SSE event echoes the effective sessionId/conversationId at stream
start so callers can persist and re-address a thread.
- Memory stays attributed per visitor (api:<visitorId>), shared across that
visitor's sessions.
All new fields are optional; omitting them reproduces the prior behaviour
byte-for-byte. Refs matevip/mateclaw#295.
IM channels (Feishu, DingTalk, WeCom, etc.) and the WebChat widget were
calling saveMessage without token usage parameters, causing promptTokens
and completionTokens to default to 0. This made the Token Statistics
module report significantly lower numbers than actual usage.
Root cause: the _usage_final event (containing promptTokens /
completionTokens) emitted by the agent graph at stream end was not being
captured in these paths, unlike ChatController's StreamAccumulator which
already handles it correctly.
Fix: capture _usage_final events in doOnNext handlers for:
- ChannelMessageRouter sync path (non-streaming IM adapters)
- ChannelMessageRouter streaming path (DingTalk, etc.)
- WebChatController SSE stream
Refs #214 (remaining String-API paths covered by follow-up).
