在React Native (Expo)中将图像转换为blob并上传到S3存储桶

npm install expo-image-picker aws-sdk

import { ImagePicker } from 'expo-image-picker';
import { S3 } from 'aws-sdk';

const pickImage = async () => {
  let result = await ImagePicker.launchImageLibraryAsync({
    mediaTypes: ImagePicker.MediaTypeOptions.Images,
    allowsEditing: true,
    aspect: [4, 3],
    quality: 1,
    base64: false,
  });

  if (!result.cancelled) {
    const response = await fetch(result.uri);
    const blob = await response.blob();

    // 在这里调用上传到S3存储桶的函数
    uploadToS3(blob);
  }
};

const uploadToS3 = (blob) => {
  const s3 = new S3({
    accessKeyId: 'YOUR_ACCESS_KEY',
    secretAccessKey: 'YOUR_SECRET_ACCESS_KEY',
    region: 'YOUR_S3_REGION',
  });

  const params = {
    Bucket: 'YOUR_BUCKET_NAME',
    Key: 'YOUR_FILE_NAME',
    Body: blob,
    ContentType: 'image/jpeg', // 根据实际情况设置正确的Content-Type
  };

  s3.upload(params, (err, data) => {
    if (err) {
      console.log('Error uploading to S3:', err);
    } else {
      console.log('Successfully uploaded to S3:', data.Location);
    }
  });
};