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340package examples
import (
"context"
"encoding/json"
"fmt"
"time"
"log"
"os"
"path/filepath"
"google.golang.org/genai"
)
func TokensContextWindow() error {
// [START tokens_context_window]
ctx := context.Background()
client, err := genai.NewClient(ctx, &genai.ClientConfig{
APIKey: os.Getenv("GEMINI_API_KEY"),
Backend: genai.BackendGeminiAPI,
})
if err != nil {
log.Fatal(err)
}
modelInfo, err := client.Models.Get(ctx, "gemini-2.0-flash", &genai.GetModelConfig{})
if err != nil {
log.Fatal(err)
}
fmt.Printf("input_token_limit=%d\n", modelInfo.InputTokenLimit)
fmt.Printf("output_token_limit=%d\n", modelInfo.OutputTokenLimit)
// [END tokens_context_window]
return err
}
func TokensTextOnly() error {
// [START tokens_text_only]
ctx := context.Background()
client, err := genai.NewClient(ctx, &genai.ClientConfig{
APIKey: os.Getenv("GEMINI_API_KEY"),
Backend: genai.BackendGeminiAPI,
})
if err != nil {
log.Fatal(err)
}
prompt := "The quick brown fox jumps over the lazy dog."
// Convert prompt to a slice of *genai.Content using the helper.
contents := []*genai.Content{
genai.NewContentFromText(prompt, genai.RoleUser),
}
countResp, err := client.Models.CountTokens(ctx, "gemini-2.0-flash", contents, nil)
if err != nil {
return err
}
fmt.Println("total_tokens:", countResp.TotalTokens)
response, err := client.Models.GenerateContent(ctx, "gemini-2.0-flash", contents, nil)
if err != nil {
log.Fatal(err)
}
usageMetadata, err := json.MarshalIndent(response.UsageMetadata, "", " ")
if err != nil {
log.Fatal(err)
}
fmt.Println(string(usageMetadata))
// [END tokens_text_only]
return err
}
func TokensChat() error {
// [START tokens_chat]
ctx := context.Background()
client, err := genai.NewClient(ctx, &genai.ClientConfig{
APIKey: os.Getenv("GEMINI_API_KEY"),
Backend: genai.BackendGeminiAPI,
})
if err != nil {
log.Fatal(err)
}
// Initialize chat with some history.
history := []*genai.Content{
{Role: genai.RoleUser, Parts: []*genai.Part{{Text: "Hi my name is Bob"}}},
{Role: genai.RoleModel, Parts: []*genai.Part{{Text: "Hi Bob!"}}},
}
chat, err := client.Chats.Create(ctx, "gemini-2.0-flash", nil, history)
if err != nil {
log.Fatal(err)
}
firstTokenResp, err := client.Models.CountTokens(ctx, "gemini-2.0-flash", chat.History(false), nil)
if err != nil {
log.Fatal(err)
}
fmt.Println(firstTokenResp.TotalTokens)
resp, err := chat.SendMessage(ctx, genai.Part{
Text: "In one sentence, explain how a computer works to a young child."},
)
if err != nil {
log.Fatal(err)
}
fmt.Printf("%#v\n", resp.UsageMetadata)
// Append an extra user message and recount.
extra := genai.NewContentFromText("What is the meaning of life?", genai.RoleUser)
hist := chat.History(false)
hist = append(hist, extra)
secondTokenResp, err := client.Models.CountTokens(ctx, "gemini-2.0-flash", hist, nil)
if err != nil {
log.Fatal(err)
}
fmt.Println(secondTokenResp.TotalTokens)
// [END tokens_chat]
return nil
}
func TokensMultimodalImageFileApi() error {
// [START tokens_multimodal_image_file_api]
ctx := context.Background()
client, err := genai.NewClient(ctx, &genai.ClientConfig{
APIKey: os.Getenv("GEMINI_API_KEY"),
Backend: genai.BackendGeminiAPI,
})
if err != nil {
log.Fatal(err)
}
file, err := client.Files.UploadFromPath(
ctx,
filepath.Join(getMedia(), "organ.jpg"),
&genai.UploadFileConfig{
MIMEType : "image/jpeg",
},
)
if err != nil {
log.Fatal(err)
}
parts := []*genai.Part{
genai.NewPartFromText("Tell me about this image"),
genai.NewPartFromURI(file.URI, file.MIMEType),
}
contents := []*genai.Content{
genai.NewContentFromParts(parts, genai.RoleUser),
}
tokenResp, err := client.Models.CountTokens(ctx, "gemini-2.0-flash", contents, nil)
if err != nil {
log.Fatal(err)
}
fmt.Println("Multimodal image token count:", tokenResp.TotalTokens)
response, err := client.Models.GenerateContent(ctx, "gemini-2.0-flash", contents, nil)
if err != nil {
log.Fatal(err)
}
usageMetadata, err := json.MarshalIndent(response.UsageMetadata, "", " ")
if err != nil {
log.Fatal(err)
}
fmt.Println(string(usageMetadata))
// [END tokens_multimodal_image_file_api]
return err
}
func TokensMultimodalVideoAudioFileApi() error {
// [START tokens_multimodal_video_audio_file_api]
ctx := context.Background()
client, err := genai.NewClient(ctx, &genai.ClientConfig{
APIKey: os.Getenv("GEMINI_API_KEY"),
Backend: genai.BackendGeminiAPI,
})
if err != nil {
log.Fatal(err)
}
file, err := client.Files.UploadFromPath(
ctx,
filepath.Join(getMedia(), "Big_Buck_Bunny.mp4"),
&genai.UploadFileConfig{
MIMEType : "video/mp4",
},
)
if err != nil {
log.Fatal(err)
}
// Poll until the video file is completely processed (state becomes ACTIVE).
for file.State == genai.FileStateUnspecified || file.State != genai.FileStateActive {
fmt.Println("Processing video...")
fmt.Println("File state:", file.State)
time.Sleep(5 * time.Second)
file, err = client.Files.Get(ctx, file.Name, nil)
if err != nil {
log.Fatal(err)
}
}
parts := []*genai.Part{
genai.NewPartFromText("Tell me about this video"),
genai.NewPartFromURI(file.URI, file.MIMEType),
}
contents := []*genai.Content{
genai.NewContentFromParts(parts, genai.RoleUser),
}
tokenResp, err := client.Models.CountTokens(ctx, "gemini-2.0-flash", contents, nil)
if err != nil {
log.Fatal(err)
}
fmt.Println("Multimodal video/audio token count:", tokenResp.TotalTokens)
response, err := client.Models.GenerateContent(ctx, "gemini-2.0-flash", contents, nil)
if err != nil {
log.Fatal(err)
}
usageMetadata, err := json.MarshalIndent(response.UsageMetadata, "", " ")
if err != nil {
log.Fatal(err)
}
fmt.Println(string(usageMetadata))
// [END tokens_multimodal_video_audio_file_api]
return err
}
func TokensMultimodalPdfFileApi() error {
// [START tokens_multimodal_pdf_file_api]
ctx := context.Background()
client, err := genai.NewClient(ctx, &genai.ClientConfig{
APIKey: os.Getenv("GEMINI_API_KEY"),
Backend: genai.BackendGeminiAPI,
})
if err != nil {
log.Fatal(err)
}
file, err := client.Files.UploadFromPath(
ctx,
filepath.Join(getMedia(), "test.pdf"),
&genai.UploadFileConfig{
MIMEType : "application/pdf",
},
)
if err != nil {
log.Fatal(err)
}
parts := []*genai.Part{
genai.NewPartFromText("Give me a summary of this document."),
genai.NewPartFromURI(file.URI, file.MIMEType),
}
contents := []*genai.Content{
genai.NewContentFromParts(parts, genai.RoleUser),
}
tokenResp, err := client.Models.CountTokens(ctx, "gemini-2.0-flash", contents, nil)
if err != nil {
log.Fatal(err)
}
fmt.Printf("Multimodal PDF token count: %d\n", tokenResp.TotalTokens)
response, err := client.Models.GenerateContent(ctx, "gemini-2.0-flash", contents, nil)
if err != nil {
log.Fatal(err)
}
usageMetadata, err := json.MarshalIndent(response.UsageMetadata, "", " ")
if err != nil {
log.Fatal(err)
}
fmt.Println(string(usageMetadata))
// [END tokens_multimodal_pdf_file_api]
return err
}
func TokensCachedContent() error {
// [START tokens_cached_content]
ctx := context.Background()
client, err := genai.NewClient(ctx, &genai.ClientConfig{
APIKey: os.Getenv("GEMINI_API_KEY"),
Backend: genai.BackendGeminiAPI,
})
if err != nil {
log.Fatal(err)
}
file, err := client.Files.UploadFromPath(
ctx,
filepath.Join(getMedia(), "a11.txt"),
&genai.UploadFileConfig{
MIMEType : "text/plain",
},
)
if err != nil {
log.Fatal(err)
}
parts := []*genai.Part{
genai.NewPartFromText("Here the Apollo 11 transcript:"),
genai.NewPartFromURI(file.URI, file.MIMEType),
}
contents := []*genai.Content{
genai.NewContentFromParts(parts, genai.RoleUser),
}
// Create cached content using a simple slice with text and a file.
cache, err := client.Caches.Create(ctx, "gemini-1.5-flash-001", &genai.CreateCachedContentConfig{
Contents: contents,
})
if err != nil {
log.Fatal(err)
}
prompt := "Please give a short summary of this file."
countResp, err := client.Models.CountTokens(ctx, "gemini-2.0-flash", []*genai.Content{
genai.NewContentFromText(prompt, genai.RoleUser),
}, nil)
if err != nil {
log.Fatal(err)
}
fmt.Printf("%d", countResp.TotalTokens)
response, err := client.Models.GenerateContent(ctx, "gemini-1.5-flash-001", []*genai.Content{
genai.NewContentFromText(prompt, genai.RoleUser),
}, &genai.GenerateContentConfig{
CachedContent: cache.Name,
})
if err != nil {
log.Fatal(err)
}
usageMetadata, err := json.MarshalIndent(response.UsageMetadata, "", " ")
if err != nil {
log.Fatal(err)
}
// Returns `nil` for some reason
fmt.Println(string(usageMetadata))
_, err = client.Caches.Delete(ctx, cache.Name, &genai.DeleteCachedContentConfig{})
// [END tokens_cached_content]
return err
}