mirror of
https://gitcode.com/JianFeeeee/ModelRouter.git
synced 2026-09-19 16:39:15 +00:00
4d197e4bd3
Root cause: trae-local-api is deployed to users without the "Fold past
assistant tool_calls into [Called tool: name({...})]" text format that
their own histories already contained. Trae-Local-API-LLM then mimics this
format in subsequent responses. The trae.lua parser only recognized
<tool_call>...</tool_call> or <toolcall>...</toolcall> tags, so
[Called tool: ...] responses were left unparsed and the client received
plain text where a structured tool_calls array should be.
Fix: Add a legacy pattern match at the END of parse_text_tool_calls to
catch the [Called tool: name({args})] shape and emit proper tool_calls.
This is a fallback; models should emit <tool_call> tags per system prompt,
but we tolerate the mimicked form for robustness.
287 lines
11 KiB
Lua
287 lines
11 KiB
Lua
-- trae 源适配器（trae-local-api 的 OpenAI 兼容代理）
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-- trae-local-api 运行在 http://127.0.0.1:19900，接 Trae CN 账号的云资源。
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-- 协议：OpenAI /v1/chat/completions
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-- 特性：
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-- - 排队：上游 busy 时排队，可能长时间无响应
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-- - 非流式请求偶发返回 SSE 数据（upstream bug）
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-- - 支持 thinking，由上游模型自动决定是否开启
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local adapter = {}
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adapter.name = "trae"
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adapter.version = "1.0.0"
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adapter.endpoint = "/v1/chat/completions"
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adapter.headers = {}
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function adapter.transform_request(raw_body)
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local ok, req = pcall(json.decode, raw_body)
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if not ok then return raw_body end
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req.disable_thinking = nil
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req.extra_body = nil
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if req.messages then
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for _, msg in ipairs(req.messages) do
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msg.reasoning_content = nil
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end
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end
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return json.encode(req)
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end
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-- parse_text_tool_calls extracts tool calls that an upstream emitted as PLAIN
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-- TEXT instead of using the OpenAI tool_calls field.
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--
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-- trae-local-api's OpenAI endpoint (/v1/chat/completions) does not read the
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-- request's `tools` array at all, so the relayed model is never told the tool
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-- schema; it falls back to printing
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-- <tool_call>
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-- {"name": "get_weather", "arguments": {"location": "北京"}}
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-- </tool_call>
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-- into message.content, leaves message.tool_calls null, and reports
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-- finish_reason="stop". A client following the OpenAI contract therefore never
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-- sees a tool call: the agent loop terminates unexpectedly mid-conversation
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-- (and a hand-written replay produces an empty function name next turn).
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--
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-- Both tag spellings are accepted: the same codebase's Anthropic endpoint
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-- instructs models to emit <toolcall>, and models mix the two. Key names vary
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-- too (arguments / params / input), so all are tried.
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--
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-- Returns (tool_calls_array_or_nil, content_with_blocks_removed).
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local function parse_text_tool_calls(content)
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if type(content) ~= "string" or content == "" then return nil, content end
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local tcs = {}
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local idx = 0
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local function collect(pattern)
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for payload in content:gmatch(pattern) do
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local ok, obj = pcall(json.decode, payload)
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if ok and type(obj) == "table" then
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-- some models wrap it as {"function":{"name":..,"arguments":..}}
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local fn = obj["function"]
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local name = obj.name or (type(fn) == "table" and fn.name) or nil
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if name then
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local args = obj.arguments or obj.params or obj.input
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if args == nil and type(fn) == "table" then
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args = fn.arguments or fn.params
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end
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if type(args) == "string" then
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local aok, decoded = pcall(json.decode, args)
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args = aok and decoded or {}
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elseif type(args) ~= "table" then
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args = {}
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end
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idx = idx + 1
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table.insert(tcs, {
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id = obj.id or ("call_text_" .. idx),
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type = "function",
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name = name,
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arguments = args
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})
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end
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end
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end
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end
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-- `<tag ...>` allows attributes; %s* handles the "</tool_call >" spacing
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-- that trae-local-api's own prompt example uses.
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collect("<tool_call[^>]*>%s*(.-)%s*</tool_call%s*>")
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collect("<toolcall[^>]*>%s*(.-)%s*</toolcall%s*>")
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-- Legacy / mimicked form: models that saw past assistant turns folded as
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-- [Called tool: name({...})]
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-- tend to emit the same shape instead of a real block. Recover it so
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-- the agent loop keeps working; otherwise the client receives plain text
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-- where a structured tool call should be. Capture the name and the JSON
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-- object literal independently (the JSON is the only {...} run here).
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if #tcs == 0 and content:find("%[Called tool") then
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for name, argsraw in content:gmatch("%[Called tool%s*:%s*([%w_%-%.]+)%s*%((%b{})%s*%)%s*%]") do
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local aok, decoded = pcall(json.decode, argsraw)
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idx = idx + 1
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table.insert(tcs, {
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id = "call_legacy_" .. idx,
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type = "function",
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name = name,
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arguments = aok and decoded or {}
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})
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end
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end
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if #tcs == 0 then return nil, content end
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-- drop the blocks from user-visible content; keep any surrounding prose
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local stripped = content:gsub("<tool_call[^>]*>%s*.-%s*</tool_call%s*>", "")
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stripped = stripped:gsub("<toolcall[^>]*>%s*.-%s*</toolcall%s*>", "")
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stripped = stripped:gsub("%[Called tool%s*:%s*[%w_%-%.]+%s*%(%b{}%s*%)%s*%]", "")
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stripped = stripped:gsub("^%s+", ""):gsub("%s+$", "")
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return tcs, stripped
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end
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function adapter.transform_response(raw_body)
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-- trae-local-api 偶发在非流式请求中返回 SSE 格式数据，
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-- 表现为多个 data: {...} 行或混合了 reasoning_chunk 等。
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-- 剥掉 data: 前缀，取最后一个完整的 JSON 块（通常是
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-- 最终的 stop chunk 或 usage chunk）。
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local use_json = raw_body
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if raw_body:match("^data:") or raw_body:match("\ndata:") then
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-- 取最后一个 data: 行的 JSON
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local last = nil
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for line in raw_body:gmatch("data: ([^\n\r]+)") do
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local trimmed = line:match("^%s*(.-)%s*$")
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if trimmed and trimmed ~= "[DONE]" then
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local ok2, obj = pcall(json.decode, trimmed)
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if ok2 and type(obj) == "table" then
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last = obj
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end
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end
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end
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if last then
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use_json = json.encode(last)
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end
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-- 如果解析失败，回退到原始 body
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end
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local ok, resp = pcall(json.decode, use_json)
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if not ok or resp == nil then return raw_body end
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local unified = {
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content = "",
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finish_reason = "",
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token_usage = { prompt = 0, completion = 0, total = 0 }
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}
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if type(resp.usage) == "table" then
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unified.token_usage.prompt = resp.usage.prompt_tokens or 0
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unified.token_usage.completion = resp.usage.completion_tokens or 0
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unified.token_usage.total = resp.usage.total_tokens or 0
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end
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if type(resp.choices) == "table" and #resp.choices > 0 then
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local ch = resp.choices[1]
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if type(ch.message) == "table" then
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unified.content = ch.message.content or ""
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if ch.message.reasoning_content then
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unified.reasoning_content = ch.message.reasoning_content
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end
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if type(ch.message.tool_calls) == "table" and #ch.message.tool_calls > 0 then
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local tcs = {}
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for _, tc in ipairs(ch.message.tool_calls) do
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local fn = tc["function"] or {}
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local args = fn.arguments
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if type(args) == "string" then
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local args_ok, decoded = pcall(json.decode, args)
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args = args_ok and decoded or {}
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elseif type(args) ~= "table" then
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args = {}
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end
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table.insert(tcs, {
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id = tc.id,
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type = tc.type or "function",
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name = fn.name,
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arguments = args
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})
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end
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unified.tool_calls = tcs
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end
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end
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unified.finish_reason = ch.finish_reason or ""
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-- Fallback: trae-local-api's OpenAI endpoint drops the request's
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-- `tools` array entirely, so the relayed model is never told the tool
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-- schema and instead PRINTS a <tool_call>{...}</tool_call> block into
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-- content, leaving message.tool_calls null and finish_reason="stop".
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-- A client following the OpenAI contract then sees a normal completion
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-- and its agent loop terminates mid-conversation. Recover the
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-- structured call so the loop can continue.
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if unified.tool_calls == nil then
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local recovered, cleaned = parse_text_tool_calls(unified.content)
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if recovered then
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unified.tool_calls = recovered
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unified.content = cleaned
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unified.finish_reason = "tool_calls"
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end
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end
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end
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return json.encode(unified)
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end
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function adapter.transform_stream_chunk(raw_chunk)
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local ok, chunk = pcall(json.decode, raw_chunk)
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if not ok then return "" end
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local uses = nil
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if type(chunk.usage) == "table" then
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uses = {
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prompt = chunk.usage.prompt_tokens or chunk.usage.prompt or 0,
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completion = chunk.usage.completion_tokens or chunk.usage.completion or 0,
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total = chunk.usage.total_tokens or chunk.usage.total or 0,
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}
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if type(chunk.usage.prompt_tokens_details) == "table" and chunk.usage.prompt_tokens_details.cached_tokens ~= nil then
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uses.prompt_tokens_details = { cached_tokens = chunk.usage.prompt_tokens_details.cached_tokens }
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elseif (chunk.usage.prompt_cache_hit_tokens or 0) > 0 then
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uses.prompt_cache_hit_tokens = chunk.usage.prompt_cache_hit_tokens
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uses.prompt_cache_miss_tokens = chunk.usage.prompt_cache_miss_tokens or 0
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uses.prompt_tokens_details = { cached_tokens = chunk.usage.prompt_cache_hit_tokens }
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end
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end
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if not chunk.choices or #chunk.choices == 0 then
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if uses ~= nil then
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return json.encode({ usage = uses, done = false })
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end
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return ""
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end
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local delta = chunk.choices[1].delta or {}
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local fr = chunk.choices[1].finish_reason
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local finish = (type(fr) == "string" and fr ~= "") and fr or nil
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local unified = {
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content = delta.content or "",
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done = (finish ~= nil)
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}
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if finish then
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unified.finish_reason = finish
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end
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if uses ~= nil then
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unified.usage = uses
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end
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if delta.reasoning_content then
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unified.reasoning_content = delta.reasoning_content
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end
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if delta.tool_calls then
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unified.tool_calls = delta.tool_calls
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end
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return json.encode(unified)
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end
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function adapter.transform_error(status, body)
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local ok, resp = pcall(json.decode, body)
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if not ok or type(resp) ~= "table" then
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-- Non-JSON body: extract title from HTML or first line
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local title = string.match(body or "", "<title>(.-)</title>")
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if title and title ~= "" then return title end
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local line = string.match(body or "", "^%s*([^\r\n]+)")
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if line and line ~= "" and not string.match(line, "^<") then
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return string.sub(line, 1, 200)
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end
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return nil
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end
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local e = resp.error
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if type(e) == "table" and type(e.message) == "string" then
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-- trae quota / rate limit annotations
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if e.code then
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return tostring(e.code) .. ": " .. e.message
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end
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return e.message
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end
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if type(e) == "string" then return e end
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if type(resp.message) == "string" and resp.message ~= "" then
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if resp.code ~= nil then
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return tostring(resp.code) .. ": " .. resp.message
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end
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return resp.message
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end
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return nil
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end
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return adapter
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