Google 検索によるグラウンディング

from google import genai
from google.genai import types

client = genai.Client()

grounding_tool = types.Tool(
    google_search=types.GoogleSearch()
)

config = types.GenerateContentConfig(
    tools=[grounding_tool]
)

response = client.models.generate_content(
    model="gemini-3-flash-preview",
    contents="Who won the euro 2024?",
    config=config,
)

print(response.text)

import { GoogleGenAI } from "@google/genai";

const ai = new GoogleGenAI({});

const groundingTool = {
  googleSearch: {},
};

const config = {
  tools: [groundingTool],
};

const response = await ai.models.generateContent({
  model: "gemini-3-flash-preview",
  contents: "Who won the euro 2024?",
  config,
});

console.log(response.text);

curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-3-flash-preview:generateContent" \
  -H "x-goog-api-key: $GEMINI_API_KEY" \
  -H "Content-Type: application/json" \
  -X POST \
  -d '{
    "contents": [
      {
        "parts": [
          {"text": "Who won the euro 2024?"}
        ]
      }
    ],
    "tools": [
      {
        "google_search": {}
      }
    ]
  }'

def add_citations(response):
    text = response.text
    supports = response.candidates[0].grounding_metadata.grounding_supports
    chunks = response.candidates[0].grounding_metadata.grounding_chunks

    # Sort supports by end_index in descending order to avoid shifting issues when inserting.
    sorted_supports = sorted(supports, key=lambda s: s.segment.end_index, reverse=True)

    for support in sorted_supports:
        end_index = support.segment.end_index
        if support.grounding_chunk_indices:
            # Create citation string like [1](link1)[2](link2)
            citation_links = []
            for i in support.grounding_chunk_indices:
                if i < len(chunks):
                    uri = chunks[i].web.uri
                    citation_links.append(f"[{i + 1}]({uri})")

            citation_string = ", ".join(citation_links)
            text = text[:end_index] + citation_string + text[end_index:]

    return text

# Assuming response with grounding metadata
text_with_citations = add_citations(response)
print(text_with_citations)

function addCitations(response) {
    let text = response.text;
    const supports = response.candidates[0]?.groundingMetadata?.groundingSupports;
    const chunks = response.candidates[0]?.groundingMetadata?.groundingChunks;

    // Sort supports by end_index in descending order to avoid shifting issues when inserting.
    const sortedSupports = [...supports].sort(
        (a, b) => (b.segment?.endIndex ?? 0) - (a.segment?.endIndex ?? 0),
    );

    for (const support of sortedSupports) {
        const endIndex = support.segment?.endIndex;
        if (endIndex === undefined || !support.groundingChunkIndices?.length) {
        continue;
        }

        const citationLinks = support.groundingChunkIndices
        .map(i => {
            const uri = chunks[i]?.web?.uri;
            if (uri) {
            return `[${i + 1}](${uri})`;
            }
            return null;
        })
        .filter(Boolean);

        if (citationLinks.length > 0) {
        const citationString = citationLinks.join(", ");
        text = text.slice(0, endIndex) + citationString + text.slice(endIndex);
        }
    }

    return text;
}

const textWithCitations = addCitations(response);
console.log(textWithCitations);