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pdf.go
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pdf.go
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// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// multimodalpdf shows an example of understanding a PDF file input
package multimodalpdf
// [START generativeaionvertexai_gemini_pdf]
import (
"context"
"errors"
"fmt"
"io"
"cloud.google.com/go/vertexai/genai"
)
// pdfPrompt is a sample prompt type consisting of one PDF asset, and a text question.
type pdfPrompt struct {
// pdfPath is a Google Cloud Storage path starting with "gs://"
pdfPath string
// question asked to the model
question string
}
// generateContentFromPDF generates a response into the provided io.Writer, based upon the PDF
// asset and the question provided in the multimodal prompt.
func generateContentFromPDF(w io.Writer, prompt pdfPrompt, projectID, location, modelName string) error {
// prompt := pdfPrompt{
// pdfPath: "gs://cloud-samples-data/generative-ai/pdf/2403.05530.pdf",
// question: `
// You are a very professional document summarization specialist.
// Please summarize the given document.
// `,
// }
// location := "us-central1"
// modelName := "gemini-1.5-pro-preview-0409"
ctx := context.Background()
client, err := genai.NewClient(ctx, projectID, location)
if err != nil {
return fmt.Errorf("unable to create client: %w", err)
}
defer client.Close()
model := client.GenerativeModel(modelName)
part := genai.FileData{
MIMEType: "application/pdf",
FileURI: prompt.pdfPath,
}
res, err := model.GenerateContent(ctx, part, genai.Text(prompt.question))
if err != nil {
return fmt.Errorf("unable to generate contents: %w", err)
}
if len(res.Candidates) == 0 ||
len(res.Candidates[0].Content.Parts) == 0 {
return errors.New("empty response from model")
}
fmt.Fprintf(w, "generated response: %s\n", res.Candidates[0].Content.Parts[0])
return nil
}
// [END generativeaionvertexai_gemini_pdf]