Fetch failed sending request

Gemini API
1

Hi all,

I’m trying to use @google/genai javascript library (^0.7.0) to integrate with “gemini-2.0-flash-exp-image-generation”.

I was running the example script from google ai to generate a flying pig:

const { GoogleGenAI } = require("@google/genai");
const fs = require("fs");

const ai = new GoogleGenAI({ apiKey: GEMINI_API_KEY });

async function generateImage() {
  const contents = "Hi, can you create a 3d rendered image of a pig " +
    "with wings and a top hat flying over a happy " +
    "futuristic scifi city with lots of greenery?";

  try {
    // Set responseModalities to include "Image" so the model can generate  an image
    const response = await ai.models.generateContent({
      model: 'gemini-2.0-flash-exp-image-generation',
      contents: contents,
      config: {
        responseModalities: ['Text', 'Image']
      },
    });
    for (const part of response.candidates[0].content.parts) {
      // Based on the part type, either show the text or save the image
      if (part.text) {
        console.log(part.text);
      } else if (part.inlineData) {
        const imageData = part.inlineData.data;
        const buffer = Buffer.from(imageData, 'base64');
        fs.writeFileSync('gemini-native-image.png', buffer);
        console.log('Image saved as gemini-native-image.png');
      }
    }
  } catch (error) {
    console.error("Error generating content:", error);
  }
}

generateImage();

But I keep getting the error of Error: exception TypeError: fetch failed sending request.

Full error:
Error generating content: Error: exception TypeError: fetch failed sending request

    at /Users/jones/Documents/projects/lnl/magicwand/node_modules/@google/genai/dist/node/index.js:7571:19
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Models.generateContent (/Users/jones/Documents/projects/lnl/magicwand/node_modules/@google/genai/dist/node/index.js:6332:20)
    at async generateImage (file:///Users/jones/Documents/projects/lnl/magicwand/backend/services/ai/google/test-gemini.js:16:22)
    at async file:///Users/jones/Documents/projects/lnl/4o-magic/backend/services/ai/google/test-gemini.js:40:3

I’m using node v20.11.1.

Additional informaiton:

I have tried using the following curl call to gemini 2 api:

curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent?key=mykey" \
-H 'Content-Type: application/json' \
-X POST \
-d '{
  "contents": [{
    "parts":[{"text": "Explain how AI works"}]
    }]
   }'

It worked well.

Does anyone know what’s causing the issue?

3

If you are in China, you can refer to this answer: TypeError: fetch failed · Issue #29 · google-gemini/generative-ai-js · GitHub