package executor import (	"bufio"	"bytes"	"context"	"fmt"	"io"	"net/http"	"strings" 	"github.com/router-for-me/CLIProxyAPI/v7/internal/runtime/executor/helps"	"github.com/router-for-me/CLIProxyAPI/v7/internal/thinking"	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/auth"	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/executor"	sdktranslator "github.com/router-for-me/CLIProxyAPI/v7/sdk/translator"	log "github.com/sirupsen/logrus"	"github.com/tidwall/gjson") func (e *ClaudeExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (_ *cliproxyexecutor.StreamResult, err error) {	if opts.Alt == "responses/compact" {		return nil, statusErr{code: http.StatusNotImplemented, msg: "/responses/compact not supported"}	}	baseModel := thinking.ParseSuffix(req.Model).ModelName	upstreamModel := e.upstreamModel(baseModel) 	apiKey, baseURL := claudeCreds(auth)	if baseURL == "" {		baseURL = "https://api.anthropic.com"	}	url := fmt.Sprintf("%s/v1/messages?beta=true", baseURL)	fp := resolveClaudeFingerprintPolicy(e.cfg, auth, apiKey)	defer func() {		if cancelErr := newClaudeOAuthCancellationError(ctx, fp.OAuthCancellation, err); cancelErr != nil {			err = cancelErr		}	}()	// Same split as Execute: OAuth signs everywhere, an opted-in API key only on	// upstreams the native gate accepts.	cchSigning := claudeCCHSigningEnabled(apiKey, claudeCCHUpstreamAnthropic, fp.ProfileClaudeCodeCLI, url) 	reporter := helps.NewExecutorUsageReporter(ctx, e, baseModel, auth)	defer reporter.TrackFailure(ctx, &err)	from := opts.SourceFormat	responseFormat := cliproxyexecutor.ResponseFormatOrSource(opts)	to := sdktranslator.FromString("claude")	var replayScope claudeThinkingReplayScope	if claudeThinkingReplayEnabled(auth, req, opts) {		req, replayScope = prepareClaudeThinkingReplayRequest(ctx, auth, req, opts)	}	defer func() {		if err != nil && replayScope.replayApplied && shouldClearKimiThinkingReplayAfterError(err) {			clearClaudeThinkingReplayContent(ctx, replayScope)		}	}()	originalPayloadSource := req.Payload	if len(opts.OriginalRequest) > 0 {		originalPayloadSource = opts.OriginalRequest	}	originalPayload := originalPayloadSource	incomingHeaders, claudeCodeDetection := detectIncomingClaudeCodeRequest(ctx, opts.Headers, originalPayload, false, e.cfg)	confirmedClaudeCode := claudeCodeDetection.Confirmed	claudeSessionID := ""	if fp.ProfileClaudeCodeCLI {		claudeSessionID = helps.ClaudeAgentSessionUUIDForRequest(incomingHeaders, originalPayload, req.Payload, confirmedClaudeCode, opts.Metadata, req.Metadata)	}	originalTranslated := helps.TranslateRequestWithAPIKeyModelCompatibility(ctx, opts.Headers, e.cfg, from, to, baseModel, originalPayload, true, helps.APIKeyModelIsCompat(req))	body := helps.TranslateRequestWithAPIKeyModelCompatibility(ctx, opts.Headers, e.cfg, from, to, baseModel, req.Payload, true, helps.APIKeyModelIsCompat(req))	body = helps.SetStringIfDifferent(body, "model", upstreamModel) 	body, err = helps.ApplyRequestThinking(body, req, opts, from.String(), to.String(), e.Identifier())	if err != nil {		return nil, err	}	if rebuildMidSystemMessageEnabled(e.cfg, auth) {		body = rebuildMidSystemMessagesToTopLevel(body)	} 	// Apply cloaking (system prompt injection, fake user ID, sensitive word obfuscation)	// based on client type and configuration.	bodyBeforeCloaking := body	var cloaked bool	body, cloaked, err = applyCloaking(		ctx,		e.cfg,		auth,		body,		apiKey,		confirmedClaudeCode,		cchSigning,	)	if err != nil {		return nil, err	}	systemPlacementState := captureClaudeCodeSystemPlacement(bodyBeforeCloaking, body, cloaked)	// Only the Messages endpoint on Anthropic itself was captured; count_tokens	// keeps its own shape and other gateways never see this field.	diagnosticsState := claudeDiagnosticsRequestState{}	contextManagementState := claudeCodeContextManagementState{		eligible:    cloaked && isAnthropicUpstreamBase(baseURL),		callerOwned: gjson.GetBytes(body, "context_management").Exists(),	}	if contextManagementState.eligible {		body, contextManagementState.automaticallyInjected = injectClaudeCodeContextManagement(body)		if fp.InjectDiagnostics {			body, diagnosticsState = injectClaudeDiagnostics(body, auth, claudeSessionID)		}	} 	requestedModel := helps.PayloadRequestedModel(opts, req.Model)	requestPath := helps.PayloadRequestPath(opts)	body, contextManagementState.payloadRuleTouched = helps.ApplyPayloadConfigWithRequestTracked(e.cfg, baseModel, to.String(), from.String(), "", body, originalTranslated, requestedModel, requestPath, opts.Headers, "context_management")	body = reconcileClaudeCodeSystemPlacementAfterPayload(body, systemPlacementState)	body = ensureModelMaxTokens(body, baseModel) 	// Disable thinking if tool_choice forces tool use (Anthropic API constraint)	body = disableThinkingIfToolChoiceForced(body)	body = reconcileClaudeCodeContextManagement(body, contextManagementState)	body = normalizeClaudeSamplingForUpstream(body, confirmedClaudeCode) 	// Default cache_control for translated entrypoints (Responses/Chat/Gemini) and other	// non-native callers. Confirmed native Claude Code owns its marker placement and must	// not be rewritten. Cloaked requests always run section-independent ensure so cloaking's	// first-user marker cannot suppress system/latest-user breakpoints.	// cloaked and confirmedClaudeCode are mutually exclusive: resolveClaudeWirePolicy	// forces Cloak off for a confirmed native client.	cpaOwnsCacheControl := shouldEnsureCacheControl(body, cloaked, confirmedClaudeCode)	if cpaOwnsCacheControl {		body = ensureCacheControl(body)	} 	// Enforce Anthropic's cache_control block limit (max 4 breakpoints per request).	body = enforceCacheControlLimit(body, 4) 	// Native selects the 1h cache pool only for OAuth credentials and pairs it with	// extended-cache-ttl-2025-04-11, which claudeCodeCLIBetas emits on exactly the	// same credential condition. Upgrading after placement is settled mirrors the	// native ttl helper.	//	// This runs only while CPA owns placement, and it then owns the ttl of every	// breakpoint it can reach: a marker carrying no ttl is the wire default, not an	// opt-in to 5m, so a cloaked caller's bare {"type":"ephemeral"} is upgraded too.	// Only a ttl the caller wrote out explicitly survives, because	// upgradeClaudeCacheControlTTL skips any block that already has one.	// claude-code-cli fingerprint profiles emit extended-cache-ttl and must use the same 1h pool.	if cpaOwnsCacheControl && fp.ProfileClaudeCodeCLI {		body = upgradeClaudeCacheControlTTL(body, claudeCacheControlTTL1h)	} 	// Normalize TTL values to prevent ordering violations under prompt-caching-scope-2026-01-05.	body = normalizeCacheControlTTL(body) 	// Extract betas from body and convert to header	var extraBetas []string	extraBetas, body = extractAndRemoveBetas(body)	bodyForTranslation := body	bodyForUpstream := body	var oauthToolNamesReverseMap map[string]string	if fp.MCPAlias && cloaked {		mcpAliases := resolveClaudeMCPAliasOptions(ctx)		bodyForUpstream, oauthToolNamesReverseMap = prepareClaudeOAuthToolNamesForUpstream(bodyForUpstream, mcpAliases)	}	bodyForUpstream = sanitizeClaudeMessagesForClaudeUpstreamWithDebug(ctx, bodyForUpstream, baseModel, helps.APIKeyModelIsCompat(req))	if fp.ApplyCLIIdentity {		bodyForUpstream, err = applyClaudeCLIIdentity(bodyForUpstream, auth, apiKey, url, claudeSessionID, fp.SynthesizeIdentity)		if err != nil {			return nil, err		}	}	cchBilling := ""	if cchSigning {		if !claudeCodeDetection.HelperProfile || claudeBodyNeedsBillingFallback(bodyForUpstream) {			cchBilling = claudeCCHFallbackBillingHeader(ctx, e.cfg, bodyForUpstream, claudeCodeDetection.Entrypoint)		}		bodyForUpstream, err = finalizeAnthropicMessagesBodyCCH(bodyForUpstream, cchBilling)		if err != nil {			return nil, fmt.Errorf("finalize Claude CCH: %w", err)		}	}	bodyForUpstream = stripDefaultKimiClaudeCodeAttribution(auth, url, fp.ProfileClaudeCodeCLI, bodyForUpstream)	// Runs on the finished body: payload rules can rewrite model and messages	// long after translation, so an earlier check would not describe the request	// that is about to be sent.	if errMidSystem := validateClaudeMidSystemMessageModel(bodyForUpstream, confirmedClaudeCode, isAnthropicUpstreamBase(baseURL)); errMidSystem != nil {		return nil, errMidSystem	}	reporter.SetTranslatedReasoningEffort(bodyForUpstream, to.String())	httpReq, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(bodyForUpstream))	if err != nil {		return nil, err	}	if errHeaders := applyClaudeHeadersWithNativeProfile(		httpReq,		auth,		apiKey,		true,		extraBetas,		bodyForUpstream,		e.cfg,		incomingHeaders,		confirmedClaudeCode && !cloaked,		claudeCodeDetection.HelperProfile,		claudeSessionID,	); errHeaders != nil {		return nil, errHeaders	}	fastRequest := isAnthropicUpstreamBase(baseURL) && claudeRequestIsFast(httpReq, bodyForUpstream)	authID, authLabel, authType, authValue := claudeAuthLogIdentity(auth)	helps.RecordAPIRequest(ctx, e.cfg, helps.UpstreamRequestLog{		URL:       url,		Method:    http.MethodPost,		Headers:   httpReq.Header.Clone(),		Body:      bodyForUpstream,		Provider:  e.upstreamRequestLogProvider(),		AuthID:    authID,		AuthLabel: authLabel,		AuthType:  authType,		AuthValue: authValue,	}) 	httpClient := helps.NewUtlsHTTPClient(ctx, e.cfg, auth, 0)	httpClient = reporter.TrackHTTPClient(httpClient)	httpResp, err := doClaudeUpstreamRequest(httpClient, httpReq)	if err != nil {		helps.RecordAPIResponseError(ctx, e.cfg, err)		return nil, wrapClaudeFastRequestError(fastRequest, 0, err)	}	helps.RecordAPIResponseMetadata(ctx, e.cfg, httpResp.StatusCode, httpResp.Header.Clone())	if httpResp.StatusCode < 200 || httpResp.StatusCode >= 300 {		// Decompress error responses — pass the Content-Encoding value (may be empty)		// and let decodeResponseBody handle both header-declared and magic-byte-detected		// compression.  This keeps error-path behaviour consistent with the success path.		errBody, decErr := decodeResponseBody(httpResp.Body, claudeResponseContentEncoding(httpResp.Header))		if decErr != nil {			helps.RecordAPIResponseError(ctx, e.cfg, decErr)			msg := fmt.Sprintf("failed to decode error response body: %v", decErr)			helps.LogWithRequestID(ctx).Warn(msg)			errClassified := classifyClaudeUpstreamError(httpResp.StatusCode, httpResp.Header, []byte(msg))			if fastRequest {				return nil, wrapClaudeFastRequestError(fastRequest, httpResp.StatusCode, errClassified)			}			return nil, errClassified		}		b, readErr := io.ReadAll(errBody)		if readErr != nil {			helps.RecordAPIResponseError(ctx, e.cfg, readErr)			msg := fmt.Sprintf("failed to read error response body: %v", readErr)			helps.LogWithRequestID(ctx).Warn(msg)			b = []byte(msg)		}		helps.AppendAPIResponseChunk(ctx, e.cfg, b)		helps.LogWithRequestID(ctx).Debugf("request error, error status: %d, error message: %s", httpResp.StatusCode, helps.SummarizeErrorBody(httpResp.Header.Get("Content-Type"), b))		if errClose := errBody.Close(); errClose != nil {			log.Errorf("response body close error: %v", errClose)		}		if fastRequest {			return nil, newClaudeFastDirectResponseError(httpResp, b)		}		return nil, classifyClaudeUpstreamError(httpResp.StatusCode, httpResp.Header, b)	}	decodedBody, err := decodeResponseBody(httpResp.Body, claudeResponseContentEncoding(httpResp.Header))	if err != nil {		helps.RecordAPIResponseError(ctx, e.cfg, err)		if errClose := httpResp.Body.Close(); errClose != nil {			log.Errorf("response body close error: %v", errClose)		}		return nil, wrapClaudeFastRequestError(fastRequest, httpResp.StatusCode, err)	}	out := make(chan cliproxyexecutor.StreamChunk, 1)	go func() {		defer close(out)		defer func() {			if errClose := decodedBody.Close(); errClose != nil {				log.Errorf("response body close error: %v", errClose)			}		}()		emitCancellation := func(cause error) bool {			cancelErr := newClaudeOAuthCancellationError(ctx, fp.OAuthCancellation, cause)			if cancelErr == nil {				return false			}			helps.RecordAPIResponseError(ctx, e.cfg, cancelErr)			reporter.PublishFailure(ctx, cancelErr)			select {			case out <- cliproxyexecutor.StreamChunk{Err: cancelErr}:			default:			}			return true		}		emitResponseError := func(errResponse error) {			errResponse = wrapClaudeFastRequestError(fastRequest, httpResp.StatusCode, errResponse)			helps.RecordAPIResponseError(ctx, e.cfg, errResponse)			reporter.PublishFailure(ctx, errResponse)			select {			case out <- cliproxyexecutor.StreamChunk{Err: errResponse}:			case <-ctx.Done():			}		} 		// If the response target is Claude, directly forward complete SSE events without translation.		if responseFormat == to {			scanner := bufio.NewScanner(decodedBody)			scanner.Buffer(nil, 52_428_800) // 50MB			var event bytes.Buffer			var upstreamMessageID string			upstreamCompleted := false			flushEvent := func() bool {				if event.Len() == 0 {					return true				}				cloned := bytes.Clone(event.Bytes())				event.Reset()				select {				case out <- cliproxyexecutor.StreamChunk{Payload: cloned}:					return true				case <-ctx.Done():					return false				}			}			for scanner.Scan() {				line := scanner.Bytes()				observeClaudeStreamLine(line, &upstreamMessageID, &upstreamCompleted)				helps.AppendAPIResponseChunk(ctx, e.cfg, line)				if detail, ok := helps.ParseClaudeStreamUsage(line); ok {					reporter.Publish(ctx, detail)				}				restoredLine, errRestore := restoreClaudeOAuthToolNamesFromStreamLine(line, oauthToolNamesReverseMap)				if errRestore != nil {					emitResponseError(fmt.Errorf("restore Claude OAuth tool name from streaming response: %w", errRestore))					return				}				line = e.restoreResponseModel(restoredLine, req.Model)				event.Write(line)				event.WriteByte('\n')				if len(bytes.TrimSpace(line)) == 0 && !flushEvent() {					emitCancellation(ctx.Err())					return				}			}			if !flushEvent() {				emitCancellation(ctx.Err())				return			}			if emitCancellation(scanner.Err()) {				return			}			if errScan := scanner.Err(); errScan != nil {				errScan = wrapClaudeFastRequestError(fastRequest, httpResp.StatusCode, errScan)				helps.RecordAPIResponseError(ctx, e.cfg, errScan)				reporter.PublishFailure(ctx, errScan)				select {				case out <- cliproxyexecutor.StreamChunk{Err: errScan}:				case <-ctx.Done():				}				return			}			if upstreamCompleted {				commitClaudeDiagnostics(diagnosticsState, upstreamMessageID)			}			return		} 		// For other formats, use translation		scanner := bufio.NewScanner(decodedBody)		scanner.Buffer(nil, 52_428_800) // 50MB		var param any		var upstreamMessageID string		upstreamCompleted := false		for scanner.Scan() {			line := scanner.Bytes()			observeClaudeStreamLine(line, &upstreamMessageID, &upstreamCompleted)			helps.AppendAPIResponseChunk(ctx, e.cfg, line)			if detail, ok := helps.ParseClaudeStreamUsage(line); ok {				reporter.Publish(ctx, detail)			}			restoredLine, errRestore := restoreClaudeOAuthToolNamesFromStreamLine(line, oauthToolNamesReverseMap)			if errRestore != nil {				emitResponseError(fmt.Errorf("restore Claude OAuth tool name from streaming response: %w", errRestore))				return			}			line = e.restoreResponseModel(restoredLine, req.Model)			chunks := sdktranslator.TranslateStream(				ctx,				to,				responseFormat,				req.Model,				opts.OriginalRequest,				bodyForTranslation,				bytes.Clone(line),				&param,			)			if responseFormat == sdktranslator.FormatOpenAIResponse {				for i, chunk := range chunks {					chunks[i] = helps.EnsureResponsesUsageDetails(chunk)				}			}			for i := range chunks {				select {				case out <- cliproxyexecutor.StreamChunk{Payload: chunks[i]}:				case <-ctx.Done():					emitCancellation(ctx.Err())					return				}			}		}		if emitCancellation(scanner.Err()) {			return		}		if errScan := scanner.Err(); errScan != nil {			errScan = wrapClaudeFastRequestError(fastRequest, httpResp.StatusCode, errScan)			helps.RecordAPIResponseError(ctx, e.cfg, errScan)			reporter.PublishFailure(ctx, errScan)			select {			case out <- cliproxyexecutor.StreamChunk{Err: errScan}:			case <-ctx.Done():			}			return		}		if upstreamCompleted {			commitClaudeDiagnostics(diagnosticsState, upstreamMessageID)		}	}()	result := &cliproxyexecutor.StreamResult{Headers: httpResp.Header.Clone(), Chunks: out}	if replayScope.valid() {		result = wrapClaudeThinkingReplayStream(ctx, result, replayScope)	}	return result, nil} func validateClaudeStreamingResponse(data []byte) error {	scanner := bufio.NewScanner(bytes.NewReader(data))	scanner.Buffer(nil, 52_428_800) 	hasData := false	hasMessageStart := false	hasMessageDelta := false 	for scanner.Scan() {		line := bytes.TrimSpace(scanner.Bytes())		if len(line) == 0 || !bytes.HasPrefix(line, []byte("data:")) {			continue		}		payload := bytes.TrimSpace(line[len("data:"):])		if len(payload) == 0 || bytes.Equal(payload, []byte("[DONE]")) {			continue		}		hasData = true		if !gjson.ValidBytes(payload) {			return statusErr{code: http.StatusBadGateway, msg: "claude executor: upstream returned malformed stream data"}		} 		root := gjson.ParseBytes(payload)		switch root.Get("type").String() {		case "error":			message := strings.TrimSpace(root.Get("error.message").String())			if message == "" {				message = strings.TrimSpace(root.Get("error.type").String())			}			if message == "" {				message = "unknown upstream error"			}			return statusErr{code: http.StatusBadGateway, msg: "claude executor: upstream returned error event: " + message}		case "message_start":			message := root.Get("message")			if strings.TrimSpace(message.Get("id").String()) == "" || strings.TrimSpace(message.Get("model").String()) == "" {				return statusErr{code: http.StatusBadGateway, msg: "claude executor: upstream stream message_start is missing id or model"}			}			hasMessageStart = true		case "message_delta":			hasMessageDelta = true		}	}	if errScan := scanner.Err(); errScan != nil {		return errScan	}	if !hasData {		return statusErr{code: http.StatusBadGateway, msg: "claude executor: upstream returned empty stream response"}	}	if !hasMessageStart {		return statusErr{code: http.StatusBadGateway, msg: "claude executor: upstream stream response is missing message_start"}	}	if !hasMessageDelta {		return statusErr{code: http.StatusBadGateway, msg: "claude executor: upstream stream response ended before message completion"}	}	return nil}