HackerRank Submission Downloader

HackerRank Submission Downloader allows you to download submissions for a contest in HackerRank.

The tool organizes the submissions according to the problem name and their programming language and then by account name.

For example,

out/2020-03-01-06-01
├── a-walk-to-remember-1
│   ├── c
│   │   ├── Cygnus_UOK.c
│   │   ├── KingCoders_SEUSL.c
│   │   └── StackTrace_NSBM_.c
│   ├── cpp
│   │   ├── BlackHawks_USJ.cpp
│   │   ├── Code_Clan_RUSL.cpp
│   │   ├── Cyborgs_USJ.cpp
│   │   ├── FRIDAY_USJ.cpp
│   │   ├── JPAC_UOP.cpp
│   │   ├── Paradox_UOJ.cpp
│   │   └── XCODERS_UOP.cpp
│   ├── csharp
│   │   └── CodeMart_UOR.cs

Development

This tool was written in Go

1. Install Golang 1.14 or newer
2. Clone the repo in your local machine
3. Run go build to build binary for your platform

To cross compile

Run chmod +x ./build/build.sh && ./build/build.sh

How to use

Download binary for your platform from release page (or build yourself 🔨).

The usage of the tool is simple. You have to provide a config.yaml in your current working directory and tool will pick this up. config.yaml contains all the necessary info to download submissions from a hackerrank contest.

Note: You should be a moderator or an administrator of the contest in order to use this tool for download submissions

sample config file config.yaml is shown below

# slug name of the contest
contest: our-contest
# browser cookies for HackerRank as semicolon seperated string
cookies: >-
  abc=123; xyz=123;
# output directory
output: results
# limit 5 parallel download threads
parallelDownloads: 5 
# wait time between downloads in seconds
waitTime: 1 
# burst per wait time
rate: 10 

Run ./hackerrank-dl with config.yaml in the working directory to start the magic.

How to get contest slug name

1. Go to HackerRank
2. Go to your contest
3. Slug name is in the pattern of https://www.hackerrank.com/aces-coders-v8
4. In here aces-coders-v8 is the slug name
5. Copy it and use it in config.yaml

How to get HackerRank browser cookies

HackerRank does not provide a public API, thus we have to use browser cookies for authentication

Following instructions are based on Chrome

1. Open Chrome
2. Login to HackerRank
3. Make sure you are an admin/moderator of your contest
4. Install EditThisCookie browser extension for chrome
5. Open extension
6. Click Settings Icon
7. Set Choose preferred export format for cookies to Semicolon seperated name=value pairs
8. Open up https://hackerrank.com
9. Open EditThisCookie extension
10. Click Export button (arrow out)
11. Paste the value for cookies in config.yaml