Files
CLIProxyAPI/internal/client/gemini-web/client.go
Luis Pater d9ad65622a refactor: standardize constant naming and improve file-based auth handling
- Renamed constants from uppercase to CamelCase for consistency.
- Replaced redundant file-based auth handling logic with the new `util.CountAuthFiles` helper.
- Fixed various error-handling inconsistencies and enhanced robustness in file operations.
- Streamlined auth client reload logic in server and watcher components.
- Applied minor code readability improvements across multiple packages.
2025-09-22 02:56:45 +08:00

817 lines
22 KiB
Go

package geminiwebapi
import (
"context"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"regexp"
"strings"
"sync"
"time"
)
// GeminiClient is the async http client interface (Go port)
type GeminiClient struct {
Cookies map[string]string
Proxy string
Running bool
httpClient *http.Client
AccessToken string
Timeout time.Duration
AutoClose bool
CloseDelay time.Duration
closeMu sync.Mutex
closeTimer *time.Timer
AutoRefresh bool
RefreshInterval time.Duration
rotateCancel context.CancelFunc
insecure bool
accountLabel string
// onCookiesRefreshed is an optional callback invoked after cookies
// are refreshed and the __Secure-1PSIDTS value changes.
onCookiesRefreshed func()
}
var NanoBananaModel = map[string]struct{}{
"gemini-2.5-flash-image-preview": {},
}
// NewGeminiClient creates a client. Pass empty strings to auto-detect via browser cookies (not implemented in Go port).
func NewGeminiClient(secure1psid string, secure1psidts string, proxy string, opts ...func(*GeminiClient)) *GeminiClient {
c := &GeminiClient{
Cookies: map[string]string{},
Proxy: proxy,
Running: false,
Timeout: 300 * time.Second,
AutoClose: false,
CloseDelay: 300 * time.Second,
AutoRefresh: true,
RefreshInterval: 540 * time.Second,
insecure: false,
}
if secure1psid != "" {
c.Cookies["__Secure-1PSID"] = secure1psid
if secure1psidts != "" {
c.Cookies["__Secure-1PSIDTS"] = secure1psidts
}
}
for _, f := range opts {
f(c)
}
return c
}
// WithInsecureTLS sets skipping TLS verification (to mirror httpx verify=False)
func WithInsecureTLS(insecure bool) func(*GeminiClient) {
return func(c *GeminiClient) { c.insecure = insecure }
}
// WithAccountLabel sets an identifying label (e.g., token filename sans .json)
// for logging purposes.
func WithAccountLabel(label string) func(*GeminiClient) {
return func(c *GeminiClient) { c.accountLabel = label }
}
// WithOnCookiesRefreshed registers a callback invoked when cookies are refreshed
// and the __Secure-1PSIDTS value changes. The callback runs in the background
// refresh goroutine; keep it lightweight and non-blocking.
func WithOnCookiesRefreshed(cb func()) func(*GeminiClient) {
return func(c *GeminiClient) { c.onCookiesRefreshed = cb }
}
// Init initializes the access token and http client.
func (c *GeminiClient) Init(timeoutSec float64, autoClose bool, closeDelaySec float64, autoRefresh bool, refreshIntervalSec float64, verbose bool) error {
// get access token
token, validCookies, err := getAccessToken(c.Cookies, c.Proxy, verbose, c.insecure)
if err != nil {
c.Close(0)
return err
}
c.AccessToken = token
c.Cookies = validCookies
tr := &http.Transport{}
if c.Proxy != "" {
if pu, errParse := url.Parse(c.Proxy); errParse == nil {
tr.Proxy = http.ProxyURL(pu)
}
}
if c.insecure {
// set via roundtripper in utils_get_access_token for token; here we reuse via default Transport
// intentionally not adding here, as requests rely on endpoints with normal TLS
}
c.httpClient = &http.Client{Transport: tr, Timeout: time.Duration(timeoutSec * float64(time.Second))}
c.Running = true
c.Timeout = time.Duration(timeoutSec * float64(time.Second))
c.AutoClose = autoClose
c.CloseDelay = time.Duration(closeDelaySec * float64(time.Second))
if c.AutoClose {
c.resetCloseTimer()
}
c.AutoRefresh = autoRefresh
c.RefreshInterval = time.Duration(refreshIntervalSec * float64(time.Second))
if c.AutoRefresh {
c.startAutoRefresh()
}
if verbose {
Success("Gemini client initialized successfully.")
}
return nil
}
func (c *GeminiClient) Close(delaySec float64) {
if delaySec > 0 {
time.Sleep(time.Duration(delaySec * float64(time.Second)))
}
c.Running = false
c.closeMu.Lock()
if c.closeTimer != nil {
c.closeTimer.Stop()
c.closeTimer = nil
}
c.closeMu.Unlock()
// Transport/client closed by GC; nothing explicit
if c.rotateCancel != nil {
c.rotateCancel()
c.rotateCancel = nil
}
}
func (c *GeminiClient) resetCloseTimer() {
c.closeMu.Lock()
defer c.closeMu.Unlock()
if c.closeTimer != nil {
c.closeTimer.Stop()
c.closeTimer = nil
}
c.closeTimer = time.AfterFunc(c.CloseDelay, func() { c.Close(0) })
}
func (c *GeminiClient) startAutoRefresh() {
if c.rotateCancel != nil {
c.rotateCancel()
}
ctx, cancel := context.WithCancel(context.Background())
c.rotateCancel = cancel
go func() {
ticker := time.NewTicker(c.RefreshInterval)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
// Step 1: rotate __Secure-1PSIDTS
oldTS := ""
if c.Cookies != nil {
oldTS = c.Cookies["__Secure-1PSIDTS"]
}
newTS, err := rotate1psidts(c.Cookies, c.Proxy, c.insecure)
if err != nil {
Warning("Failed to refresh cookies. Background auto refresh canceled: %v", err)
cancel()
return
}
// Prepare a snapshot of cookies for access token refresh
nextCookies := map[string]string{}
for k, v := range c.Cookies {
nextCookies[k] = v
}
if newTS != "" {
nextCookies["__Secure-1PSIDTS"] = newTS
}
// Step 2: refresh access token using updated cookies
token, validCookies, err := getAccessToken(nextCookies, c.Proxy, false, c.insecure)
if err != nil {
// Apply rotated cookies even if token refresh fails, then retry on next tick
c.Cookies = nextCookies
Warning("Failed to refresh access token after cookie rotation: %v", err)
} else {
c.AccessToken = token
c.Cookies = validCookies
}
if c.accountLabel != "" {
DebugRaw("Cookies refreshed [%s]. New __Secure-1PSIDTS: %s", c.accountLabel, MaskToken28(nextCookies["__Secure-1PSIDTS"]))
} else {
DebugRaw("Cookies refreshed. New __Secure-1PSIDTS: %s", MaskToken28(nextCookies["__Secure-1PSIDTS"]))
}
// Trigger persistence only when TS actually changes
if c.onCookiesRefreshed != nil {
currentTS := ""
if c.Cookies != nil {
currentTS = c.Cookies["__Secure-1PSIDTS"]
}
if currentTS != "" && currentTS != oldTS {
c.onCookiesRefreshed()
}
}
}
}
}()
}
// ensureRunning mirrors the Python decorator behavior and retries on APIError.
func (c *GeminiClient) ensureRunning() error {
if c.Running {
return nil
}
return c.Init(float64(c.Timeout/time.Second), c.AutoClose, float64(c.CloseDelay/time.Second), c.AutoRefresh, float64(c.RefreshInterval/time.Second), false)
}
// GenerateContent sends a prompt (with optional files) and parses the response into ModelOutput.
func (c *GeminiClient) GenerateContent(prompt string, files []string, model Model, gem *Gem, chat *ChatSession) (ModelOutput, error) {
var empty ModelOutput
if prompt == "" {
return empty, &ValueError{Msg: "Prompt cannot be empty."}
}
if err := c.ensureRunning(); err != nil {
return empty, err
}
if c.AutoClose {
c.resetCloseTimer()
}
// Retry wrapper similar to decorator (retry=2)
retries := 2
for {
out, err := c.generateOnce(prompt, files, model, gem, chat)
if err == nil {
return out, nil
}
var apiErr *APIError
var imgErr *ImageGenerationError
shouldRetry := false
if errors.As(err, &imgErr) {
if retries > 1 {
retries = 1
} // only once for image generation
shouldRetry = true
} else if errors.As(err, &apiErr) {
shouldRetry = true
}
if shouldRetry && retries > 0 {
time.Sleep(time.Second)
retries--
continue
}
return empty, err
}
}
func ensureAnyLen(slice []any, index int) []any {
if index < len(slice) {
return slice
}
gap := index + 1 - len(slice)
return append(slice, make([]any, gap)...)
}
func (c *GeminiClient) generateOnce(prompt string, files []string, model Model, gem *Gem, chat *ChatSession) (ModelOutput, error) {
var empty ModelOutput
// Build f.req
var uploaded [][]any
for _, fp := range files {
id, err := uploadFile(fp, c.Proxy, c.insecure)
if err != nil {
return empty, err
}
name, err := parseFileName(fp)
if err != nil {
return empty, err
}
uploaded = append(uploaded, []any{[]any{id}, name})
}
var item0 any
if len(uploaded) > 0 {
item0 = []any{prompt, 0, nil, uploaded}
} else {
item0 = []any{prompt}
}
var item2 any = nil
if chat != nil {
item2 = chat.Metadata()
}
inner := []any{item0, nil, item2}
requestedModel := strings.ToLower(model.Name)
if chat != nil && chat.RequestedModel() != "" {
requestedModel = chat.RequestedModel()
}
if _, ok := NanoBananaModel[requestedModel]; ok {
inner = ensureAnyLen(inner, 49)
inner[49] = 14
}
if gem != nil {
// pad with 16 nils then gem ID
for i := 0; i < 16; i++ {
inner = append(inner, nil)
}
inner = append(inner, gem.ID)
}
innerJSON, _ := json.Marshal(inner)
outer := []any{nil, string(innerJSON)}
outerJSON, _ := json.Marshal(outer)
// form
form := url.Values{}
form.Set("at", c.AccessToken)
form.Set("f.req", string(outerJSON))
req, _ := http.NewRequest(http.MethodPost, EndpointGenerate, strings.NewReader(form.Encode()))
// headers
for k, v := range HeadersGemini {
for _, vv := range v {
req.Header.Add(k, vv)
}
}
for k, v := range model.ModelHeader {
for _, vv := range v {
req.Header.Add(k, vv)
}
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded;charset=utf-8")
for k, v := range c.Cookies {
req.AddCookie(&http.Cookie{Name: k, Value: v})
}
resp, err := c.httpClient.Do(req)
if err != nil {
return empty, &TimeoutError{GeminiError{Msg: "Generate content request timed out."}}
}
defer func() {
_ = resp.Body.Close()
}()
if resp.StatusCode == 429 {
// Surface 429 as TemporarilyBlocked to match Python behavior
c.Close(0)
return empty, &TemporarilyBlocked{GeminiError{Msg: "Too many requests. IP temporarily blocked."}}
}
if resp.StatusCode != 200 {
c.Close(0)
return empty, &APIError{Msg: fmt.Sprintf("Failed to generate contents. Status %d", resp.StatusCode)}
}
// Read body and split lines; take the 3rd line (index 2)
b, _ := io.ReadAll(resp.Body)
parts := strings.Split(string(b), "\n")
if len(parts) < 3 {
c.Close(0)
return empty, &APIError{Msg: "Invalid response data received."}
}
var responseJSON []any
if err = json.Unmarshal([]byte(parts[2]), &responseJSON); err != nil {
c.Close(0)
return empty, &APIError{Msg: "Invalid response data received."}
}
// find body where main_part[4] exists
var (
body any
bodyIndex int
)
for i, p := range responseJSON {
arr, ok := p.([]any)
if !ok || len(arr) < 3 {
continue
}
s, ok := arr[2].(string)
if !ok {
continue
}
var mainPart []any
if err = json.Unmarshal([]byte(s), &mainPart); err != nil {
continue
}
if len(mainPart) > 4 && mainPart[4] != nil {
body = mainPart
bodyIndex = i
break
}
}
if body == nil {
// Fallback: scan subsequent lines to locate a data frame with a non-empty body (mainPart[4]).
var lastTop []any
for li := 3; li < len(parts) && body == nil; li++ {
line := strings.TrimSpace(parts[li])
if line == "" {
continue
}
var top []any
if err = json.Unmarshal([]byte(line), &top); err != nil {
continue
}
lastTop = top
for i, p := range top {
arr, ok := p.([]any)
if !ok || len(arr) < 3 {
continue
}
s, ok := arr[2].(string)
if !ok {
continue
}
var mainPart []any
if err = json.Unmarshal([]byte(s), &mainPart); err != nil {
continue
}
if len(mainPart) > 4 && mainPart[4] != nil {
body = mainPart
bodyIndex = i
responseJSON = top
break
}
}
}
// Parse nested error code to align with Python mapping
var top []any
// Prefer lastTop from fallback scan; otherwise try parts[2]
if len(lastTop) > 0 {
top = lastTop
} else {
_ = json.Unmarshal([]byte(parts[2]), &top)
}
if len(top) > 0 {
if code, ok := extractErrorCode(top); ok {
switch code {
case ErrorUsageLimitExceeded:
return empty, &UsageLimitExceeded{GeminiError{Msg: fmt.Sprintf("Failed to generate contents. Usage limit of %s has exceeded. Please try switching to another model.", model.Name)}}
case ErrorModelInconsistent:
return empty, &ModelInvalid{GeminiError{Msg: "Selected model is inconsistent or unavailable."}}
case ErrorModelHeaderInvalid:
return empty, &APIError{Msg: "Invalid model header string. Please update the selected model header."}
case ErrorIPTemporarilyBlocked:
return empty, &TemporarilyBlocked{GeminiError{Msg: "Too many requests. IP temporarily blocked."}}
}
}
}
// Debug("Invalid response: control frames only; no body found")
// Close the client to force re-initialization on next request (parity with Python client behavior)
c.Close(0)
return empty, &APIError{Msg: "Failed to generate contents. Invalid response data received."}
}
bodyArr := body.([]any)
// metadata
var metadata []string
if len(bodyArr) > 1 {
if metaArr, ok := bodyArr[1].([]any); ok {
for _, v := range metaArr {
if s, isOk := v.(string); isOk {
metadata = append(metadata, s)
}
}
}
}
// candidates parsing
candContainer, ok := bodyArr[4].([]any)
if !ok {
return empty, &APIError{Msg: "Failed to parse response body."}
}
candidates := make([]Candidate, 0, len(candContainer))
reCard := regexp.MustCompile(`^http://googleusercontent\.com/card_content/\d+`)
reGen := regexp.MustCompile(`http://googleusercontent\.com/image_generation_content/\d+`)
for ci, candAny := range candContainer {
cArr, isOk := candAny.([]any)
if !isOk {
continue
}
// text: cArr[1][0]
var text string
if len(cArr) > 1 {
if sArr, isOk1 := cArr[1].([]any); isOk1 && len(sArr) > 0 {
text, _ = sArr[0].(string)
}
}
if reCard.MatchString(text) {
// candidate[22] and candidate[22][0] or text
if len(cArr) > 22 {
if arr, isOk1 := cArr[22].([]any); isOk1 && len(arr) > 0 {
if s, isOk2 := arr[0].(string); isOk2 {
text = s
}
}
}
}
// thoughts: candidate[37][0][0]
var thoughts *string
if len(cArr) > 37 {
if a, ok1 := cArr[37].([]any); ok1 && len(a) > 0 {
if b1, ok2 := a[0].([]any); ok2 && len(b1) > 0 {
if s, ok3 := b1[0].(string); ok3 {
ss := decodeHTML(s)
thoughts = &ss
}
}
}
}
// web images: candidate[12][1]
var webImages []WebImage
var imgSection any
if len(cArr) > 12 {
imgSection = cArr[12]
}
if arr, ok1 := imgSection.([]any); ok1 && len(arr) > 1 {
if imagesArr, ok2 := arr[1].([]any); ok2 {
for _, wiAny := range imagesArr {
wiArr, ok3 := wiAny.([]any)
if !ok3 {
continue
}
// url: wiArr[0][0][0], title: wiArr[7][0], alt: wiArr[0][4]
var urlStr, title, alt string
if len(wiArr) > 0 {
if a, ok5 := wiArr[0].([]any); ok5 && len(a) > 0 {
if b1, ok6 := a[0].([]any); ok6 && len(b1) > 0 {
urlStr, _ = b1[0].(string)
}
if len(a) > 4 {
if s, ok6 := a[4].(string); ok6 {
alt = s
}
}
}
}
if len(wiArr) > 7 {
if a, ok4 := wiArr[7].([]any); ok4 && len(a) > 0 {
title, _ = a[0].(string)
}
}
webImages = append(webImages, WebImage{Image: Image{URL: urlStr, Title: title, Alt: alt, Proxy: c.Proxy}})
}
}
}
// generated images
var genImages []GeneratedImage
hasGen := false
if arr, ok1 := imgSection.([]any); ok1 && len(arr) > 7 {
if a, ok2 := arr[7].([]any); ok2 && len(a) > 0 && a[0] != nil {
hasGen = true
}
}
if hasGen {
// find img part
var imgBody []any
for pi := bodyIndex; pi < len(responseJSON); pi++ {
part := responseJSON[pi]
arr, ok1 := part.([]any)
if !ok1 || len(arr) < 3 {
continue
}
s, ok1 := arr[2].(string)
if !ok1 {
continue
}
var mp []any
if err = json.Unmarshal([]byte(s), &mp); err != nil {
continue
}
if len(mp) > 4 {
if tt, ok2 := mp[4].([]any); ok2 && len(tt) > ci {
if sec, ok3 := tt[ci].([]any); ok3 && len(sec) > 12 {
if ss, ok4 := sec[12].([]any); ok4 && len(ss) > 7 {
if first, ok5 := ss[7].([]any); ok5 && len(first) > 0 && first[0] != nil {
imgBody = mp
break
}
}
}
}
}
}
if imgBody == nil {
return empty, &ImageGenerationError{APIError{Msg: "Failed to parse generated images."}}
}
imgCand := imgBody[4].([]any)[ci].([]any)
if len(imgCand) > 1 {
if a, ok1 := imgCand[1].([]any); ok1 && len(a) > 0 {
if s, ok2 := a[0].(string); ok2 {
text = strings.TrimSpace(reGen.ReplaceAllString(s, ""))
}
}
}
// images list at imgCand[12][7][0]
if len(imgCand) > 12 {
if s1, ok1 := imgCand[12].([]any); ok1 && len(s1) > 7 {
if s2, ok2 := s1[7].([]any); ok2 && len(s2) > 0 {
if s3, ok3 := s2[0].([]any); ok3 {
for ii, giAny := range s3 {
ga, ok4 := giAny.([]any)
if !ok4 || len(ga) < 4 {
continue
}
// url: ga[0][3][3]
var urlStr, title, alt string
if a, ok5 := ga[0].([]any); ok5 && len(a) > 3 {
if b1, ok6 := a[3].([]any); ok6 && len(b1) > 3 {
urlStr, _ = b1[3].(string)
}
}
// title from ga[3][6]
if len(ga) > 3 {
if a, ok5 := ga[3].([]any); ok5 {
if len(a) > 6 {
if v, ok6 := a[6].(float64); ok6 && v != 0 {
title = fmt.Sprintf("[Generated Image %.0f]", v)
} else {
title = "[Generated Image]"
}
} else {
title = "[Generated Image]"
}
// alt from ga[3][5][ii] fallback
if len(a) > 5 {
if tt, ok6 := a[5].([]any); ok6 {
if ii < len(tt) {
if s, ok7 := tt[ii].(string); ok7 {
alt = s
}
} else if len(tt) > 0 {
if s, ok7 := tt[0].(string); ok7 {
alt = s
}
}
}
}
}
}
genImages = append(genImages, GeneratedImage{Image: Image{URL: urlStr, Title: title, Alt: alt, Proxy: c.Proxy}, Cookies: c.Cookies})
}
}
}
}
}
}
cand := Candidate{
RCID: fmt.Sprintf("%v", cArr[0]),
Text: decodeHTML(text),
Thoughts: thoughts,
WebImages: webImages,
GeneratedImages: genImages,
}
candidates = append(candidates, cand)
}
if len(candidates) == 0 {
return empty, &GeminiError{Msg: "Failed to generate contents. No output data found in response."}
}
output := ModelOutput{Metadata: metadata, Candidates: candidates, Chosen: 0}
if chat != nil {
chat.lastOutput = &output
}
return output, nil
}
// extractErrorCode attempts to navigate the known nested error structure and fetch the integer code.
// Mirrors Python path: response_json[0][5][2][0][1][0]
func extractErrorCode(top []any) (int, bool) {
if len(top) == 0 {
return 0, false
}
a, ok := top[0].([]any)
if !ok || len(a) <= 5 {
return 0, false
}
b, ok := a[5].([]any)
if !ok || len(b) <= 2 {
return 0, false
}
c, ok := b[2].([]any)
if !ok || len(c) == 0 {
return 0, false
}
d, ok := c[0].([]any)
if !ok || len(d) <= 1 {
return 0, false
}
e, ok := d[1].([]any)
if !ok || len(e) == 0 {
return 0, false
}
f, ok := e[0].(float64)
if !ok {
return 0, false
}
return int(f), true
}
// StartChat returns a ChatSession attached to the client
func (c *GeminiClient) StartChat(model Model, gem *Gem, metadata []string) *ChatSession {
return &ChatSession{client: c, metadata: normalizeMeta(metadata), model: model, gem: gem, requestedModel: strings.ToLower(model.Name)}
}
// ChatSession holds conversation metadata
type ChatSession struct {
client *GeminiClient
metadata []string // cid, rid, rcid
lastOutput *ModelOutput
model Model
gem *Gem
requestedModel string
}
func (cs *ChatSession) String() string {
var cid, rid, rcid string
if len(cs.metadata) > 0 {
cid = cs.metadata[0]
}
if len(cs.metadata) > 1 {
rid = cs.metadata[1]
}
if len(cs.metadata) > 2 {
rcid = cs.metadata[2]
}
return fmt.Sprintf("ChatSession(cid='%s', rid='%s', rcid='%s')", cid, rid, rcid)
}
func normalizeMeta(v []string) []string {
out := []string{"", "", ""}
for i := 0; i < len(v) && i < 3; i++ {
out[i] = v[i]
}
return out
}
func (cs *ChatSession) Metadata() []string { return cs.metadata }
func (cs *ChatSession) SetMetadata(v []string) { cs.metadata = normalizeMeta(v) }
func (cs *ChatSession) RequestedModel() string { return cs.requestedModel }
func (cs *ChatSession) SetRequestedModel(name string) {
cs.requestedModel = strings.ToLower(name)
}
func (cs *ChatSession) CID() string {
if len(cs.metadata) > 0 {
return cs.metadata[0]
}
return ""
}
func (cs *ChatSession) RID() string {
if len(cs.metadata) > 1 {
return cs.metadata[1]
}
return ""
}
func (cs *ChatSession) RCID() string {
if len(cs.metadata) > 2 {
return cs.metadata[2]
}
return ""
}
func (cs *ChatSession) setCID(v string) {
if len(cs.metadata) < 1 {
cs.metadata = normalizeMeta(cs.metadata)
}
cs.metadata[0] = v
}
func (cs *ChatSession) setRID(v string) {
if len(cs.metadata) < 2 {
cs.metadata = normalizeMeta(cs.metadata)
}
cs.metadata[1] = v
}
func (cs *ChatSession) setRCID(v string) {
if len(cs.metadata) < 3 {
cs.metadata = normalizeMeta(cs.metadata)
}
cs.metadata[2] = v
}
// SendMessage shortcut to client's GenerateContent
func (cs *ChatSession) SendMessage(prompt string, files []string) (ModelOutput, error) {
out, err := cs.client.GenerateContent(prompt, files, cs.model, cs.gem, cs)
if err == nil {
cs.lastOutput = &out
cs.SetMetadata(out.Metadata)
cs.setRCID(out.RCID())
}
return out, err
}
// ChooseCandidate selects a candidate from last output and updates rcid
func (cs *ChatSession) ChooseCandidate(index int) (ModelOutput, error) {
if cs.lastOutput == nil {
return ModelOutput{}, &ValueError{Msg: "No previous output data found in this chat session."}
}
if index >= len(cs.lastOutput.Candidates) {
return ModelOutput{}, &ValueError{Msg: fmt.Sprintf("Index %d exceeds candidates", index)}
}
cs.lastOutput.Chosen = index
cs.setRCID(cs.lastOutput.RCID())
return *cs.lastOutput, nil
}