Export files from MongoDB GridFS with directory paths

export_gridfs.sh

#!/bin/bash
# http://www.vladimirm.com/blog/2011/06/export-files-from-mongodb-gridfs-with-directory-paths/

_host="${1:?Usage: gridfs host db}"
_db="${2:?Usage: gridfs host db}"
while read -r line; do
    file=$(echo "$line" | awk -F'\t' '{ print $1 }')
    [[ $file == 'connected to'* ]] && continue
    directory=${file%/*}
    mkdir -p $directory
    mongofiles -h $_host -db $_db get $file
done < <(mongofiles -h $_host -db $_db list)

any file with spaces in file name won't be exported. Need to replace $file with "$file"

For those looking for answer in 2016. For a recent mongo db it is usefull to use someting like this:

#!/bin/bash

_host="${1:?Usage: gridfs host db}"
_db="${2:?Usage: gridfs host db}"
while read -r line; do
    file=$(echo "$line" | awk -F'\t' '{ print $1 }')
    [[ $file == 'connected to'* ]] && continue
    mongofiles -h $_host -d $_db --port 3001 get "$file"
done < <(mongofiles -h $_host -d $_db --port 3001 list)

Besides if you are working with something like meteor collectionFS you can add --prefix=cfs_gridfs.images or similar parameter to mongofiles command strings

Hey guys! I have a NodeJS app that stores all of its data, even images, to a MongoDB server. Now I want to use an S3 to store these images (43gb) and so, I need to transfer them there.

Whilst I have figured out how to transfer files from a server to an S3 using the s3cmd tool, I have NO idea how to export my images from the db! I know they are stored in the fs.files and fs.chunks collections, but I can't figure out how to actually use them as input to s3cmd!

I found this script, but I'm not sure how to use it... Any help will be much appreciated!!!