Amazon S3 boto3 如何遍歷存儲桶中的對象？

Question

在my_bucket.objects.all()應用程序中，我試圖遍歷 S3 存儲桶中的對象並嘗試打印密鑰/文件名，但my_bucket.objects.all()僅返回存儲桶中的第一個對象。 它沒有返回所有對象。 輸出是[001.pdf]而不是[001, 002, 003, 004, 005]

from flask import Flask, jsonify, Response, request
from flask_cors import CORS, cross_origin
from config import S3_BUCKET, S3_ACCESS_KEY, S3_SECRET_ACCESS_KEY

import boto3
import csv
import re


s3 = boto3.client(
    's3',
    aws_access_key_id=S3_ACCESS_KEY,
    aws_secret_access_key=S3_SECRET_ACCESS_KEY
)

app = Flask(__name__)
CORS(app, supports_credentials=True)


@app.route('/')
def health():
    return jsonify({"message": "app is working"})


@app.route('/files')
def list_of_files():
    s3_resource = boto3.resource('s3')
    my_bucket = s3_resource.Bucket(S3_BUCKET)
    summaries = my_bucket.objects.all()
    files = []
    for file in summaries:
        # this prints the bucket object
        print("Object: {}".format(summaries))
        files.append(file.key)
        # file.key is supposed to return the names of the list of objects
        # print(file.key)
        return jsonify({"files":"{}".format(file.key)})




if __name__ == "__main__":
    app.run()

Answer 1

您過早返回而退出循環。

def list_of_files():
    s3_resource = boto3.resource('s3')
    my_bucket = s3_resource.Bucket(S3_BUCKET)
    summaries = my_bucket.objects.all()
    files = []
    for file in summaries:
        files.append(file.key)
    return jsonify({"files": files})