Initial commit: coomer_dl creator/post/file downloader

Downloads every file of a Coomer creator, a single post, or a single
file URL via the site's JSON API. Resumes partial files and reuses the
creator folder so re-runs only fetch new posts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

5 files changed, 652 insertions, 0 deletions

diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..4c44b8d
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,59 @@
+# AGENTS.md
+
+Guidance for AI coding agents working in this repository.
+
+## What this is
+
+`coomer_dl`: single-file Python script that downloads Coomer creators, single
+posts and single files. Runtime dependency: `requests` only. Keep it a single
+file and do not add dependencies. Sibling project: `../bunkr_dl`, same
+structure and `download_file`.
+
+## Download chain
+
+The site sits behind DDoS-Guard. When the script finds nothing, re-inspect the
+API with `curl --compressed -H 'Accept: text/css'` before changing code.
+
+1. `GET /api/v1/<service>/user/<id>/posts?o=N` returns a JSON list of up to 50
+   posts. Pagination stops on a short or empty page.
+2. `GET /api/v1/<service>/user/<id>/post/<post id>` returns
+   `{"post": {...}, ...}`.
+3. `GET /api/v1/<service>/user/<id>/profile` gives the creator `name`, used as
+   the folder name.
+4. Each post has `file` (may be `{}`) and `attachments`, each `{name, path}`.
+   The main file often repeats as an attachment, `post_files` dedupes by path.
+5. `GET /data<path>` 302-redirects to `nN.<domain>/data<path>`.
+
+All API calls need `Accept: text/css`, otherwise 403.
+
+## Conventions
+
+- New options go in the `argparse` setup in `main()` and in the README usage
+  table.
+- `download_file` resumes with a per-request `Range` header. Never mutate the
+  global `headers` dict. 206 appends, 200 overwrites, 416 means already complete.
+- Creator folders are reused across runs (not suffixed like bunkr_dl) so a
+  re-run resumes and only fetches new posts.
+- Use placeholder URLs (`https://coomer.st/onlyfans/user/NAME`) in docs,
+  comments and commit messages, never real creator names or post ids.
+
+## Testing
+
+No test suite. Verify the API side without downloading by stubbing
+`download_file`:
+
+    python - <<'PY'
+    import importlib.util, importlib.machinery
+    l = importlib.machinery.SourceFileLoader('c', 'coomer_dl')
+    c = importlib.util.module_from_spec(importlib.util.spec_from_loader('c', l)); l.exec_module(c)
+    got = []; c.download_file = lambda *a: got.append(a)
+    c.process_creator('https://coomer.st', 'onlyfans', 'NAME', '/tmp/x')
+    print(len(got), got[0])
+    PY
+
+The "Found N posts" total should match `post_count` from the profile endpoint.
+For a full run use `-o` pointing at a temp dir.
+
+## Repo facts
+
+- License: GPLv2 only (`LICENSE`, header in `coomer_dl`).
diff --git a/CLAUDE.md b/CLAUDE.md
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index 0000000..0d86339
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,6 @@
+# CLAUDE.md
+
+This file is intentionally thin. AGENTS.md is the single source of truth for
+project guidance, shared across every agent tool. Edit AGENTS.md instead.
+
+@AGENTS.md
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..9efa6fb
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,338 @@
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ed788e9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,70 @@
+# coomer_dl
+
+Download every file of a Coomer creator, of a single post, or a single file,
+from the command line.
+
+- Follows the creator's post pagination (50 posts per API page).
+- Saves files as `<post id>_<original name>`, so a post's files stay together.
+- Resumes partial files and skips finished ones when run again against the
+  same folder, so re-running a creator only fetches what is new.
+- Works with any Coomer mirror domain, since API and file URLs are built from
+  the URL you pass.
+
+## Requirements
+
+Python 3.12+ with `requests`.
+
+## Usage
+
+```
+coomer_dl [-h] [-o DIR] url
+```
+
+| Option             | Meaning                                              |
+|--------------------|------------------------------------------------------|
+| `url`              | Creator URL (`https://<domain>/<service>/user/<id>`), post URL (`.../post/<id>`) or file URL (`https://<domain>/data/...`) |
+| `-o, --output DIR` | Base download folder (default: `/data/coomer`)       |
+| `-h, --help`       | Show help and exit                                   |
+
+The default folder is set by `DEFAULT_OUTPUT` near the top of the script.
+
+Examples:
+
+```
+coomer_dl https://coomer.st/onlyfans/user/NAME
+coomer_dl https://coomer.st/onlyfans/user/NAME/post/123456
+coomer_dl -o ~/Downloads 'https://coomer.st/data/ab/cd/HASH.mp4?f=name.mp4'
+```
+
+Quote file URLs so the shell leaves `?` and `&` alone.
+
+### Where files go
+
+- Creator or post: `OUTPUT/<creator name>/<post id>_<file name>`.
+- File URL: `OUTPUT/<file name>`, taken from the `?f=` parameter when present.
+
+## How it works
+
+1. `GET /api/v1/<service>/user/<id>/posts?o=N` pages through the posts, or
+   `GET /api/v1/<service>/user/<id>/post/<post id>` fetches one.
+2. Each post has a `file` and `attachments`, each with a storage `path`.
+3. `GET /data<path>` redirects to a file node (`nN.<domain>`) serving the file.
+
+API calls send `Accept: text/css`, without it DDoS-Guard answers 403. When the
+script reports nothing found, check these steps against the live site first.
+
+## License
+
+Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License version 2 as published by the Free
+Software Foundation. See [LICENSE](LICENSE) for the full text.
+
+## Development Approach
+
+This project is developed using AI-assisted tools. Code is generated with the help of AI based on human-provided specifications, design decisions, and iterative feedback.
+
+All contributions are reviewed, tested, and curated by the maintainer before being included in the codebase. AI is used as a productivity and exploration tool, while human oversight remains central to all decisions.
+
+The goal is to combine the flexibility of AI-assisted development with standard open-source practices such as transparency, review, and accountability.
diff --git a/coomer_dl b/coomer_dl
new file mode 100755
index 0000000..4a6acb4
--- /dev/null
+++ b/coomer_dl
@@ -0,0 +1,179 @@
+#! /usr/bin/env python
+
+# coomer_dl - download Coomer creators, posts and single files
+# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import requests
+import re
+import os
+import argparse
+import time
+from urllib.parse import urlparse, parse_qs
+
+DEFAULT_OUTPUT = "/data/coomer"  # Base download folder, override with -o/--output
+
+headers = {
+    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36'
+}
+# DDoS-Guard answers API calls with 403 unless the client asks for text/css
+api_headers = {**headers, 'Accept': 'text/css'}
+
+PAGE_SIZE = 50  # Posts returned per /posts call
+
+
+def api_get(base, path, **params):
+    """GET <base>/api/v1<path> and return the decoded JSON, or None on failure"""
+    try:
+        r = requests.get(f"{base}/api/v1{path}", params=params, headers=api_headers, timeout=60)
+        r.raise_for_status()
+        return r.json()
+    except (requests.exceptions.RequestException, ValueError) as e:
+        print(f"Failed to fetch {base}/api/v1{path}: {e}")
+        return None
+
+
+def post_files(post):
+    """Yield (path, name) for the main file and attachments of a post, without duplicates"""
+    seen = set()
+    for f in [post.get('file') or {}] + (post.get('attachments') or []):
+        if f.get('path') and f['path'] not in seen:
+            seen.add(f['path'])
+            yield f['path'], f.get('name') or f['path'].split('/')[-1]
+
+
+def download_file(file_url, file_name, save_dir, retries=5):
+    """Function to download the file with retries and resume functionality"""
+    local_filename = os.path.join(save_dir, file_name.replace('/', '_'))
+
+    attempt = 0
+    while attempt < retries:
+        # Recompute each attempt so a retry resumes from what was written
+        req_headers = dict(headers)
+        if os.path.exists(local_filename):
+            req_headers["Range"] = f"bytes={os.path.getsize(local_filename)}-"
+        try:
+            with requests.get(file_url, headers=req_headers, stream=True, timeout=60) as response:
+                if response.status_code == 416:  # Range past end: already complete
+                    print(f"Already downloaded: {local_filename}")
+                    return local_filename
+                response.raise_for_status()
+                # Check if it's a resumable download
+                if response.status_code == 206:
+                    print(f"Resuming download for: {local_filename}")
+                    mode = 'ab'
+                else:  # Full body: start over instead of appending to a partial file
+                    print(f"Downloading: {local_filename}")
+                    mode = 'wb'
+
+                with open(local_filename, mode) as f:
+                    for chunk in response.iter_content(chunk_size=8192):
+                        if chunk:  # Filter out keep-alive chunks
+                            f.write(chunk)
+            print(f"Download complete: {local_filename}")
+            return local_filename
+        except (requests.exceptions.ConnectionError, requests.exceptions.ChunkedEncodingError, requests.exceptions.Timeout) as e:
+            attempt += 1
+            print(f"Error during download: {e}. Retrying {attempt}/{retries}...")
+            time.sleep(5)  # Wait before retrying
+        except Exception as e:
+            print(f"Failed to download {file_url}: {e}")
+            break
+
+    print(f"Failed to download {file_url} after {retries} attempts.")
+    return None
+
+
+def download_posts(base, posts, save_dir):
+    """Download every file of the given posts into save_dir"""
+    os.makedirs(save_dir, exist_ok=True)
+    for post in posts:
+        for path, name in post_files(post):
+            # Prefix the post id: keeps a post's files together and names unique
+            download_file(f"{base}/data{path}", f"{post['id']}_{name}", save_dir)
+
+
+def creator_name(base, service, user):
+    """Display name of a creator, falling back to the id in the URL"""
+    profile = api_get(base, f"/{service}/user/{user}/profile")
+    return (profile or {}).get('name') or user
+
+
+def process_creator(base, service, user, base_save_directory):
+    """Download every post of a creator, following ?o= pagination"""
+    posts = []
+    while True:
+        page = api_get(base, f"/{service}/user/{user}/posts", o=len(posts))
+        if not page:  # Empty list past the last page, None on error
+            break
+        posts += page
+        print(f"Found {len(posts)} posts so far")
+        if len(page) < PAGE_SIZE:
+            break
+
+    if not posts:
+        print(f"No posts found for {service}/{user}")
+        return
+    download_posts(base, posts, os.path.join(base_save_directory, creator_name(base, service, user)))
+
+
+def process_post(base, service, user, post_id, base_save_directory):
+    """Download every file of a single post"""
+    data = api_get(base, f"/{service}/user/{user}/post/{post_id}")
+    if not data:
+        return
+    post = data.get('post', data)  # Newer API wraps the post, older returns it bare
+    download_posts(base, [post], os.path.join(base_save_directory, creator_name(base, service, user)))
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Download every file of a Coomer creator, of a single post, or a single\n"
+                    "file. Partially downloaded files are resumed and finished ones skipped\n"
+                    "when run again against the same folder.",
+        epilog="Creator and post files go to OUTPUT/<creator>/<post id>_<file name>.\n"
+               "Single files go to OUTPUT/<file name>.\n\n"
+               "Examples:\n"
+               "  %(prog)s https://coomer.st/onlyfans/user/NAME\n"
+               "  %(prog)s https://coomer.st/onlyfans/user/NAME/post/123456\n"
+               "  %(prog)s -o ~/Downloads 'https://coomer.st/data/ab/cd/HASH.mp4?f=name.mp4'",
+        formatter_class=argparse.RawDescriptionHelpFormatter)
+    parser.add_argument('url', help="creator URL (https://<domain>/<service>/user/<id>), post URL "
+                                    "(.../post/<id>) or file URL (.../data/...)")
+    parser.add_argument('-o', '--output', default=DEFAULT_OUTPUT, metavar='DIR',
+                        help=f"base download folder (default: {DEFAULT_OUTPUT})")
+    args = parser.parse_args()
+
+    base_save_directory = os.path.expanduser(args.output)
+    u = urlparse(args.url)
+    # File nodes (n1.coomer.st, ...) serve /data too, the API lives on the main domain
+    base = f"{u.scheme}://{re.sub(r'^n\d+\.', '', u.netloc)}"
+
+    if u.path.startswith('/data/'):
+        os.makedirs(base_save_directory, exist_ok=True)
+        name = parse_qs(u.query).get('f', [u.path.split('/')[-1]])[0]
+        download_file(args.url, name, base_save_directory)
+    elif m := re.match(r'/([^/]+)/user/([^/]+)/post/([^/]+)', u.path):
+        print(f"Processing post {args.url}")
+        process_post(base, *m.groups(), base_save_directory)
+    elif m := re.match(r'/([^/]+)/user/([^/]+)/?$', u.path):
+        print(f"Processing creator {args.url}")
+        process_creator(base, *m.groups(), base_save_directory)
+    else:
+        parser.error(f"unrecognised URL: {args.url}")
+
+
+if __name__ == "__main__":
+    main()