Download s3 file if key match pattern

Let us say we have three files in our bucket, file1, file2, and file3. And then with the help of include, we can include the files which we want to download.

Example - --include "file1" will include the file1. To download the entire bucket, use the below command -. The above command downloads all the files from the bucket you specified in the local folder. As you may have noticed, we have used sync or cp in the above commands. Just for your knowledge, the difference between the sync and cp is that the sync option syncs your bucket with the local folder whereas the cp command copies the objects you specified to the local folder.

For our purpose to download files from s3 we can use either one of sync or cp. I believe this post helped you solve your problem. I hope you got what you were looking for and you learned something valuable. If you found this post helpful, please subscribe to my newsletter by filling the form below. It would not take more than 7 seconds. Your support motivates me to write more and more helpful posts. Take a look at the picture, you see the word "FAIL". Yeah, this is the result of my first attempt at If a folder is present inside the bucket, its throwing an error.

This solution first compiles a list of objects then iteratively creates the specified directories and downloads the existing objects. To maintain the appearance of directories, path names are stored as part of the object Key filename. For example:. You could either truncate the filename to only save the. Note that it could be multi-level nested directories. Although, it does the job, I'm not sure its good to do this way. I'm leaving it here to help other users and further answers, with better manner of achieving this.

Better late than never: The previous answer with paginator is really good. However it is recursive, and you might end up hitting Python's recursion limits.

Here's an alternate approach, with a couple of extra checks. This should work for all number of objects also when there are more than Each paginator page can contain up to objects. Notice extra param in os. In Amazon S3, buckets and objects are the primary resources, and objects are stored in buckets. Amazon S3 has a flat structure instead of a hierarchy like you would see in a file system. However, for the sake of organizational simplicity, the Amazon S3 console supports the folder concept as a means of grouping objects.

Amazon S3 does this by using a shared name prefix for objects that is, objects have names that begin with a common string. Object names are also referred to as key names. For example, you can create a folder on the console named photos and store an object named myphoto. To download all files from "mybucket" into the current directory respecting the bucket's emulated directory structure creating the folders from the bucket if they don't already exist locally :.

A lot of the solutions here get pretty complicated. If you're looking for something simpler, cloudpathlib wraps things in a nice way for this use case that will download directories or files. Note: for large folders with lots of files, awscli at the command line is likely faster. If you want you can change the directory. If you want to call a bash script using python, here is a simple method to load a file from a folder in S3 bucket to a local folder in a Linux machine :.

I got the similar requirement and got help from reading few of the above solutions and across other websites, I have came up with below script, Just wanted to share if it might help anyone. Reposting glefait 's answer with an if condition at the end to avoid os error The first key it gets is the folder name itself which cannot be written in the destination path.

I have been running into this problem for a while and with all of the different forums I've been through I haven't see a full end-to-end snip-it of what works. So, I went ahead and took all the pieces add some stuff on my own and have created a full end-to-end S3 Downloader! This will not only download files automatically but if the S3 files are in subdirectories, it will create them on the local storage.

In my application's instance, I need to set permissions and owners so I have added that too can be comment out if not needed. I hope this helps someone out in their quest of finding S3 Download automation.

Adjust constants as appropriate. Usage: sbt 'run key ID key' - bltadwin. Connect and share knowledge within a single location that is structured and easy to search. I would like to use the AWS CLI to query the contents of a bucket and see if a particular file exists, but the bucket contains thousands of files. How can I filter the results to only show key names that match a pattern?

For example:. JMESPath has an internal function contains that allows you to search for a string pattern. If you want to search for keys starting with certain characters, you can also use the --prefix argument:. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Filter S3 list-objects results to find a key matching a pattern Ask Question. Asked 7 years ago. Active 1 year, 1 month ago.