AWS S3根据条件路径检查文件是否存在 [英] AWS S3 check if file exists based on a conditional path

问题描述

如果给定文件存在，我想检查文件是否存在于存储桶的单独目录中.我具有以下目录结构-

I would like to check if a file exists in a separate directory of the bucket if a given file exists. I have the following directory structure-

import boto3
s3 = boto3.resource('s3')
def file_exists(fileN):
    try:
        s3.Object('my-bucket', 'folder1/folder2/'+fileN).load()
    except:
        return False
    else:
        fileN = fileN.split(".")[0]
        try:

            s3.Object('my-bucket', 'folder1/<randomid folderxxxx>/'+fileN+'_condition.jpg').load()
        except:
            return False
        else:
            return True

file_exists("test.jpg")

这可行，但是只要我可以发送 randomfolderID 作为参数即可.有没有更好，更优雅的方法呢?

This works but as long as I can send the randomfolderIDas an argument. Is there a better and elegant way to do it?

基本上我必须检查一下，

Basically I have to check if,

my-bucket/folder1/folder2/test.jpg (如果存在)，然后检查 my-bucket/folder1/< randomID>/test_condition.jpg (如果还存在)，则返回 True

my-bucket/folder1/folder2/test.jpg if this exists then check my-bucket/folder1/<randomID>/test_condition.jpg if this also exists then return True

推荐答案

我最终使用了这个代码，它提供了一些简洁的代码

I ended up using this which gave a little cleaner code

import boto3
s3client = boto3.client('s3')

def all_file_exist(bucket, prefix, fileN):
    fileFound = False
    fileConditionFound = False
    theObjs = s3client.list_objects_v2(Bucket=bucket, Prefix=prefix)
    for object in theObjs['Contents']:
        if object['Key'].endswith(fileN+'_condition.jpg') :
            fileConditionFound = True
        if object['Key'].endswith(fileN+".jpg") :
            fileFound = True
    if (fileFound and fileConditionFound) : 
        return True
    return False

all_file_exist("bucket","folder1", "test")

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