mirror of
https://github.com/CJackHwang/ds2api.git
synced 2026-05-05 00:45:29 +08:00
282 lines
10 KiB
Go
282 lines
10 KiB
Go
package chat
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"io"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"ds2api/internal/assistantturn"
|
|
"ds2api/internal/auth"
|
|
"ds2api/internal/completionruntime"
|
|
"ds2api/internal/config"
|
|
dsprotocol "ds2api/internal/deepseek/protocol"
|
|
openaifmt "ds2api/internal/format/openai"
|
|
"ds2api/internal/promptcompat"
|
|
"ds2api/internal/sse"
|
|
streamengine "ds2api/internal/stream"
|
|
)
|
|
|
|
func (h *Handler) ChatCompletions(w http.ResponseWriter, r *http.Request) {
|
|
if isVercelStreamReleaseRequest(r) {
|
|
h.handleVercelStreamRelease(w, r)
|
|
return
|
|
}
|
|
if isVercelStreamPowRequest(r) {
|
|
h.handleVercelStreamPow(w, r)
|
|
return
|
|
}
|
|
if isVercelStreamPrepareRequest(r) {
|
|
h.handleVercelStreamPrepare(w, r)
|
|
return
|
|
}
|
|
|
|
a, err := h.Auth.Determine(r)
|
|
if err != nil {
|
|
status := http.StatusUnauthorized
|
|
detail := err.Error()
|
|
if err == auth.ErrNoAccount {
|
|
status = http.StatusTooManyRequests
|
|
}
|
|
writeOpenAIError(w, status, detail)
|
|
return
|
|
}
|
|
var sessionID string
|
|
defer func() {
|
|
h.autoDeleteRemoteSession(r.Context(), a, sessionID)
|
|
h.Auth.Release(a)
|
|
}()
|
|
|
|
r = r.WithContext(auth.WithAuth(r.Context(), a))
|
|
|
|
r.Body = http.MaxBytesReader(w, r.Body, openAIGeneralMaxSize)
|
|
var req map[string]any
|
|
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
|
|
if strings.Contains(strings.ToLower(err.Error()), "too large") {
|
|
writeOpenAIError(w, http.StatusRequestEntityTooLarge, "request body too large")
|
|
return
|
|
}
|
|
writeOpenAIError(w, http.StatusBadRequest, "invalid json")
|
|
return
|
|
}
|
|
if err := h.preprocessInlineFileInputs(r.Context(), a, req); err != nil {
|
|
writeOpenAIInlineFileError(w, err)
|
|
return
|
|
}
|
|
stdReq, err := promptcompat.NormalizeOpenAIChatRequest(h.Store, req, requestTraceID(r))
|
|
if err != nil {
|
|
writeOpenAIError(w, http.StatusBadRequest, err.Error())
|
|
return
|
|
}
|
|
stdReq, err = h.applyCurrentInputFile(r.Context(), a, stdReq)
|
|
if err != nil {
|
|
status, message := mapCurrentInputFileError(err)
|
|
writeOpenAIError(w, status, message)
|
|
return
|
|
}
|
|
historySession := startChatHistory(h.ChatHistory, r, a, stdReq)
|
|
|
|
if !stdReq.Stream {
|
|
result, outErr := completionruntime.ExecuteNonStreamWithRetry(r.Context(), h.DS, a, stdReq, completionruntime.Options{
|
|
StripReferenceMarkers: stripReferenceMarkersEnabled(),
|
|
RetryEnabled: true,
|
|
CurrentInputFile: h.Store,
|
|
})
|
|
sessionID = result.SessionID
|
|
if outErr != nil {
|
|
if historySession != nil {
|
|
historySession.error(outErr.Status, outErr.Message, outErr.Code, result.Turn.Thinking, result.Turn.Text)
|
|
}
|
|
writeOpenAIErrorWithCode(w, outErr.Status, outErr.Message, outErr.Code)
|
|
return
|
|
}
|
|
respBody := openaifmt.BuildChatCompletionWithToolCalls(result.SessionID, stdReq.ResponseModel, result.Turn.Prompt, result.Turn.Thinking, result.Turn.Text, result.Turn.ToolCalls, stdReq.ToolsRaw)
|
|
respBody["usage"] = assistantturn.OpenAIChatUsage(result.Turn)
|
|
finishReason := assistantturn.FinalizeTurn(result.Turn, assistantturn.FinalizeOptions{}).FinishReason
|
|
if historySession != nil {
|
|
historySession.success(http.StatusOK, result.Turn.Thinking, result.Turn.Text, finishReason, assistantturn.OpenAIChatUsage(result.Turn))
|
|
}
|
|
writeJSON(w, http.StatusOK, respBody)
|
|
return
|
|
}
|
|
|
|
start, outErr := completionruntime.StartCompletion(r.Context(), h.DS, a, stdReq, completionruntime.Options{
|
|
CurrentInputFile: h.Store,
|
|
})
|
|
sessionID = start.SessionID
|
|
if outErr != nil {
|
|
if historySession != nil {
|
|
historySession.error(outErr.Status, outErr.Message, outErr.Code, "", "")
|
|
}
|
|
writeOpenAIErrorWithCode(w, outErr.Status, outErr.Message, outErr.Code)
|
|
return
|
|
}
|
|
streamReq := start.Request
|
|
refFileTokens := streamReq.RefFileTokens
|
|
h.handleStreamWithRetry(w, r, a, start.Response, start.Payload, start.Pow, sessionID, streamReq.ResponseModel, streamReq.PromptTokenText, refFileTokens, streamReq.Thinking, streamReq.Search, streamReq.ToolNames, streamReq.ToolsRaw, streamReq.ToolChoice, historySession)
|
|
}
|
|
|
|
func (h *Handler) autoDeleteRemoteSession(ctx context.Context, a *auth.RequestAuth, sessionID string) {
|
|
mode := h.Store.AutoDeleteMode()
|
|
if mode == "none" || a.DeepSeekToken == "" {
|
|
return
|
|
}
|
|
|
|
deleteBaseCtx := context.WithoutCancel(ctx)
|
|
deleteCtx, cancel := context.WithTimeout(deleteBaseCtx, 10*time.Second)
|
|
defer cancel()
|
|
|
|
switch mode {
|
|
case "single":
|
|
if sessionID == "" {
|
|
config.Logger.Warn("[auto_delete_sessions] skipped single-session delete because session_id is empty", "account", a.AccountID)
|
|
return
|
|
}
|
|
_, err := h.DS.DeleteSessionForToken(deleteCtx, a.DeepSeekToken, sessionID)
|
|
if err != nil {
|
|
config.Logger.Warn("[auto_delete_sessions] failed", "account", a.AccountID, "mode", mode, "session_id", sessionID, "error", err)
|
|
return
|
|
}
|
|
config.Logger.Debug("[auto_delete_sessions] success", "account", a.AccountID, "mode", mode, "session_id", sessionID)
|
|
case "all":
|
|
if err := h.DS.DeleteAllSessionsForToken(deleteCtx, a.DeepSeekToken); err != nil {
|
|
config.Logger.Warn("[auto_delete_sessions] failed", "account", a.AccountID, "mode", mode, "error", err)
|
|
return
|
|
}
|
|
config.Logger.Debug("[auto_delete_sessions] success", "account", a.AccountID, "mode", mode)
|
|
default:
|
|
config.Logger.Warn("[auto_delete_sessions] unknown mode", "account", a.AccountID, "mode", mode)
|
|
}
|
|
}
|
|
|
|
func (h *Handler) handleNonStream(w http.ResponseWriter, resp *http.Response, completionID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
|
|
if resp.StatusCode != http.StatusOK {
|
|
defer func() { _ = resp.Body.Close() }()
|
|
body, _ := io.ReadAll(resp.Body)
|
|
if historySession != nil {
|
|
historySession.error(resp.StatusCode, string(body), "error", "", "")
|
|
}
|
|
writeOpenAIError(w, resp.StatusCode, string(body))
|
|
return
|
|
}
|
|
result := sse.CollectStream(resp, thinkingEnabled, true)
|
|
|
|
turn := assistantturn.BuildTurnFromCollected(result, assistantturn.BuildOptions{
|
|
Model: model,
|
|
Prompt: finalPrompt,
|
|
RefFileTokens: refFileTokens,
|
|
SearchEnabled: searchEnabled,
|
|
StripReferenceMarkers: stripReferenceMarkersEnabled(),
|
|
ToolNames: toolNames,
|
|
ToolsRaw: toolsRaw,
|
|
ToolChoice: promptcompat.DefaultToolChoicePolicy(),
|
|
})
|
|
outcome := assistantturn.FinalizeTurn(turn, assistantturn.FinalizeOptions{})
|
|
if outcome.ShouldFail {
|
|
status, message, code := outcome.Error.Status, outcome.Error.Message, outcome.Error.Code
|
|
if historySession != nil {
|
|
historySession.error(status, message, code, turn.Thinking, turn.Text)
|
|
}
|
|
writeOpenAIErrorWithCode(w, status, message, code)
|
|
return
|
|
}
|
|
respBody := openaifmt.BuildChatCompletionWithToolCalls(completionID, model, finalPrompt, turn.Thinking, turn.Text, turn.ToolCalls, toolsRaw)
|
|
respBody["usage"] = assistantturn.OpenAIChatUsage(turn)
|
|
if historySession != nil {
|
|
historySession.success(http.StatusOK, turn.Thinking, turn.Text, outcome.FinishReason, assistantturn.OpenAIChatUsage(turn))
|
|
}
|
|
writeJSON(w, http.StatusOK, respBody)
|
|
}
|
|
|
|
func (h *Handler) handleStream(w http.ResponseWriter, r *http.Request, resp *http.Response, completionID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
|
|
defer func() { _ = resp.Body.Close() }()
|
|
if resp.StatusCode != http.StatusOK {
|
|
body, _ := io.ReadAll(resp.Body)
|
|
if historySession != nil {
|
|
historySession.error(resp.StatusCode, string(body), "error", "", "")
|
|
}
|
|
writeOpenAIError(w, resp.StatusCode, string(body))
|
|
return
|
|
}
|
|
w.Header().Set("Content-Type", "text/event-stream")
|
|
w.Header().Set("Cache-Control", "no-cache, no-transform")
|
|
w.Header().Set("Connection", "keep-alive")
|
|
w.Header().Set("X-Accel-Buffering", "no")
|
|
rc := http.NewResponseController(w)
|
|
_, canFlush := w.(http.Flusher)
|
|
if !canFlush {
|
|
config.Logger.Warn("[stream] response writer does not support flush; streaming may be buffered")
|
|
}
|
|
|
|
created := time.Now().Unix()
|
|
bufferToolContent := len(toolNames) > 0
|
|
emitEarlyToolDeltas := h.toolcallFeatureMatchEnabled() && h.toolcallEarlyEmitHighConfidence()
|
|
stripReferenceMarkers := stripReferenceMarkersEnabled()
|
|
initialType := "text"
|
|
if thinkingEnabled {
|
|
initialType = "thinking"
|
|
}
|
|
|
|
streamRuntime := newChatStreamRuntime(
|
|
w,
|
|
rc,
|
|
canFlush,
|
|
completionID,
|
|
created,
|
|
model,
|
|
finalPrompt,
|
|
thinkingEnabled,
|
|
searchEnabled,
|
|
stripReferenceMarkers,
|
|
toolNames,
|
|
toolsRaw,
|
|
promptcompat.DefaultToolChoicePolicy(),
|
|
bufferToolContent,
|
|
emitEarlyToolDeltas,
|
|
)
|
|
streamRuntime.refFileTokens = refFileTokens
|
|
|
|
streamengine.ConsumeSSE(streamengine.ConsumeConfig{
|
|
Context: r.Context(),
|
|
Body: resp.Body,
|
|
ThinkingEnabled: thinkingEnabled,
|
|
InitialType: initialType,
|
|
KeepAliveInterval: time.Duration(dsprotocol.KeepAliveTimeout) * time.Second,
|
|
IdleTimeout: time.Duration(dsprotocol.StreamIdleTimeout) * time.Second,
|
|
MaxKeepAliveNoInput: dsprotocol.MaxKeepaliveCount,
|
|
}, streamengine.ConsumeHooks{
|
|
OnKeepAlive: func() {
|
|
streamRuntime.sendKeepAlive()
|
|
},
|
|
OnParsed: func(parsed sse.LineResult) streamengine.ParsedDecision {
|
|
decision := streamRuntime.onParsed(parsed)
|
|
if historySession != nil {
|
|
historySession.progress(streamRuntime.accumulator.Thinking.String(), streamRuntime.accumulator.Text.String())
|
|
}
|
|
return decision
|
|
},
|
|
OnFinalize: func(reason streamengine.StopReason, _ error) {
|
|
if string(reason) == "content_filter" {
|
|
streamRuntime.finalize("content_filter", false)
|
|
} else {
|
|
streamRuntime.finalize("stop", false)
|
|
}
|
|
if historySession == nil {
|
|
return
|
|
}
|
|
if streamRuntime.finalErrorMessage != "" {
|
|
historySession.error(streamRuntime.finalErrorStatus, streamRuntime.finalErrorMessage, streamRuntime.finalErrorCode, streamRuntime.accumulator.Thinking.String(), streamRuntime.accumulator.Text.String())
|
|
return
|
|
}
|
|
historySession.success(http.StatusOK, streamRuntime.finalThinking, streamRuntime.finalText, streamRuntime.finalFinishReason, streamRuntime.finalUsage)
|
|
},
|
|
OnContextDone: func() {
|
|
if historySession != nil {
|
|
historySession.stopped(streamRuntime.accumulator.Thinking.String(), streamRuntime.accumulator.Text.String(), string(streamengine.StopReasonContextCancelled))
|
|
}
|
|
},
|
|
})
|
|
}
|