Initial commit: bunkr_dl album downloaderHEADmaster

Single-file Python script that downloads Bunkr albums and search
results. Supports the current Bunkr layout (relative /f/ links,
dl.<domain>/file/<id> pages, _001_v2 metadata API and signed CDN
URLs), follows paginated albums, resumes partial downloads and
takes an -o/--output override for the base folder.

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

5 files changed, 772 insertions, 0 deletions

diff --git a/AGENTS.md b/AGENTS.md
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--- /dev/null
+++ b/AGENTS.md
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+# AGENTS.md
+
+Guidance for AI coding agents working in this repository.
+
+## What this is
+
+`bunkr_dl`: single-file Python script that downloads Bunkr albums and search
+results. Runtime dependencies: `requests`, `beautifulsoup4`, `lxml`. Keep it a
+single file and do not add dependencies.
+
+On the maintainer's machine the script is installed as a symlink into the repo,
+so edits are live immediately:
+
+    ~/bin/bunkr_dl -> bunkr_dl
+
+## Download chain
+
+Bunkr breaks this regularly (domain rotation, layout changes). When the script
+finds nothing, re-inspect the live pages with `curl` before changing code.
+
+1. Album page `https://<domain>/a/<id>`: relative `/f/<slug>` anchors. Large
+   albums are paginated as `?page=N` (100 files each). An out-of-range page
+   returns the last page again, so pagination stops when a page adds no new
+   links, not when a page is empty. The page also contains a JS template with
+   `href="/f/' + file.slug + '"`, which the parser correctly ignores.
+2. File page `/f/<slug>`: anchor to `https://dl.<domain>/file/<numeric id>`.
+3. `POST https://dl.<domain>/api/_001_v2` with JSON `{"id": "<id>"}` returns
+   `{"mediafiles", "path", "original"}`.
+4. `GET https://glb-apisign.cdn.cr/sign?path=<path>` returns `{"token", "ex"}`.
+   Download `<mediafiles><path>?token=..&ex=..`.
+
+## 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.
+- Use placeholder URLs (`https://bunkr.cr/a/XXXXXXXX`) in docs, comments and
+  commit messages, never real album URLs or titles.
+
+## Testing
+
+No test suite. Verify against a real album without writing to the default
+output folder, by loading the script as a module and stubbing the download
+step:
+
+    python - <<'EOF'
+    import importlib.util, importlib.machinery
+    l = importlib.machinery.SourceFileLoader('b', 'bunkr_dl')
+    b = importlib.util.module_from_spec(importlib.util.spec_from_loader('b', l)); l.exec_module(b)
+    u = 'https://bunkr.cr/a/XXXXXXXX'
+    soup = b.get_soup(u); links = b.find_media_links(u, soup); print(len(links))
+    fm = b.get_final_media_link(b.find_download_link(links[0])); print(fm[1])
+    EOF
+
+Compare the link count with the "N files" shown on the album page. For a full
+run use `-o` pointing at a temp dir.
+
+## Repo facts
+
+- License: GPLv2 only (`LICENSE`, header in `bunkr_dl`).
+- `origin` is the personal git server (cgit section "Linux").
diff --git a/CLAUDE.md b/CLAUDE.md
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--- /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..7c78d57
--- /dev/null
+++ b/README.md
@@ -0,0 +1,77 @@
+# bunkr_dl
+
+Download every file of a Bunkr album, or of every album found by a Bunkr
+search, from the command line.
+
+- Follows paginated albums (`?page=N`, 100 files per page).
+- Saves files under their original names.
+- Resumes partially downloaded files when run again against the same folder.
+- Works with any Bunkr mirror domain, since links are resolved relative to the
+  URL you pass.
+
+## Requirements
+
+Python 3 with:
+
+- `requests`
+- `beautifulsoup4`
+- `lxml`
+
+## Usage
+
+```
+bunkr_dl [-h] [-o DIR] url
+```
+
+| Option             | Meaning                                              |
+|--------------------|------------------------------------------------------|
+| `url`              | Album URL (`https://<domain>/a/<id>`) or search URL (containing `?search=`) |
+| `-o, --output DIR` | Base download folder (default: `/data/bunkr`)        |
+| `-h, --help`       | Show help and exit                                   |
+
+The default folder is set by `DEFAULT_OUTPUT` near the top of the script.
+
+Examples:
+
+```
+bunkr_dl https://bunkr.cr/a/XXXXXXXX
+bunkr_dl -o ~/Downloads https://bunkr.cr/a/XXXXXXXX
+bunkr_dl 'https://bunkr.cr/?search=some%20name'
+```
+
+Quote search URLs so the shell leaves `?` and `&` alone.
+
+### Where files go
+
+- Album: `OUTPUT/<album title>/`. If that folder already exists, a ` - 2`,
+  ` - 3`, ... suffix is added.
+- Search: `OUTPUT/<Search Terms>/<album title>/`, one subfolder per album found.
+
+## How it works
+
+1. Album page: collect the `/f/<slug>` file links, following `?page=N` until a
+   page adds nothing new.
+2. File page: find the `https://dl.<domain>/file/<id>` download link.
+3. POST the id to `/api/_001_v2` on that host to get the storage path and
+   original file name.
+4. Ask `https://glb-apisign.cdn.cr/sign` for a token and download the signed
+   CDN URL.
+
+Bunkr changes domains and page layout often. When the script reports no media,
+check these steps against the live pages first.
+
+## License
+
+Copyright (C) 2025-2026 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/bunkr_dl b/bunkr_dl
new file mode 100755
index 0000000..9ea1184
--- /dev/null
+++ b/bunkr_dl
@@ -0,0 +1,289 @@
+#! /usr/bin/env python
+
+# bunkr_dl - download Bunkr albums and search results
+# Copyright (C) 2025-2026 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
+from bs4 import BeautifulSoup
+import re
+import os
+import argparse
+import time
+from urllib.parse import urljoin, urlparse, quote
+
+DEFAULT_OUTPUT = "/data/bunkr"  # Base download folder, override with -o/--output
+
+# Define headers to mimic a browser request
+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'
+}
+
+def get_soup(url):
+    """Helper function to get parsed HTML"""
+    response = requests.get(url, headers=headers)
+    if response.status_code == 200:
+        return BeautifulSoup(response.content, 'lxml')
+    else:
+        print(f"Failed to fetch {url}, status code: {response.status_code}")
+        return None
+
+def is_search_page(url):
+    """Check if the provided URL is a search page (contains '?search=')"""
+    return '?search=' in url
+
+def extract_search_query(url):
+    """Extract and format the search query from the URL"""
+    query = re.search(r'\?search=([^&]+)', url)
+    if query:
+        search_text = query.group(1).replace('%20', ' ')  # Replace encoded spaces with actual spaces
+        # Capitalize each word in the search text
+        return ' '.join(word.capitalize() for word in search_text.split())
+    return "Unknown_Search"
+
+def extract_album_title(soup):
+    """Extract album title from <h1> tag if available"""
+    title_tag = soup.find('h1') if soup else None
+    if title_tag:
+        return title_tag.text.strip()
+    return "Unnamed_Album"
+
+def find_album_links_from_search(base_url):
+    """Function to find all album links from the search results page"""
+    page = 1
+    album_links = []
+
+    while True:
+        # Modify the base_url to add page parameter if necessary
+        search_url = f"{base_url}&page={page}" if page > 1 else base_url
+        soup = get_soup(search_url)
+
+        if not soup:
+            print(f"Failed to fetch page {page}")
+            break
+        
+        # Find album links on the current search page
+        found = False
+        for link in soup.find_all('a', href=True):
+            if re.search(r"/a/\w+", link['href']):
+                album_links.append(urljoin(search_url, link['href']))
+                found = True
+        
+        # If no more albums found on this page, stop
+        if not found:
+            break
+        
+        page += 1
+    
+    return album_links
+
+def find_media_links(album_url, soup):
+    """Function to find all file page links (/f/<slug>) on the album page"""
+    media_links = []
+    for link in soup.find_all('a', href=True):
+        if re.match(r"(https://[^/]+)?/f/\w+", link['href']):
+            url = urljoin(album_url, link['href'])
+            if url not in media_links:
+                media_links.append(url)
+    return media_links
+
+def find_download_link(media_page_url):
+    """Function to extract the download page link (https://dl.<domain>/file/<id>)"""
+    soup = get_soup(media_page_url)
+    if not soup:
+        return None
+
+    for link in soup.find_all('a', href=True):
+        if re.search(r"https://[^/]+/file/\d+", link['href']):
+            return link['href']
+
+    return None
+
+def get_final_media_link(download_page_url):
+    """Resolve the download page to a signed media URL and the original file name.
+
+    Mirrors the page's JS: POST the file id to /api/_001_v2 for the storage
+    path, then ask the sign service for a token.
+    """
+    file_id = download_page_url.rstrip('/').split('/')[-1]
+    host = urlparse(download_page_url)
+    try:
+        meta = requests.post(f"{host.scheme}://{host.netloc}/api/_001_v2", json={'id': file_id},
+                             headers={**headers, 'Referer': download_page_url}, timeout=30)
+        meta.raise_for_status()
+        meta = meta.json()
+        sign = requests.get("https://glb-apisign.cdn.cr/sign", params={'path': meta['path']},
+                            headers=headers, timeout=30)
+        sign.raise_for_status()
+        sign = sign.json()
+    except (requests.exceptions.RequestException, ValueError, KeyError) as e:
+        print(f"Failed to resolve {download_page_url}: {e}")
+        return None
+
+    url = f"{meta['mediafiles']}{quote(meta['path'])}?token={sign['token']}&ex={sign['ex']}"
+    name = (meta.get('original') or meta['path'].split('/')[-1]).replace('/', '_')
+    return url, name
+
+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)
+
+    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 ensure_unique_folder(base_folder, folder_name):
+    """Ensure the folder name is unique by adding suffixes like ' - 2', ' - 3' if necessary"""
+    folder_path = os.path.join(base_folder, folder_name)
+    if not os.path.exists(folder_path):
+        return folder_path
+
+    # If folder exists, add a numerical suffix
+    suffix = 2
+    while os.path.exists(f"{folder_path} - {suffix}"):
+        suffix += 1
+
+    return f"{folder_path} - {suffix}"
+
+def process_album(album_url, base_save_directory):
+    """Process a single album to download all media"""
+    soup = get_soup(album_url)
+    if not soup:
+        return
+    album_title = extract_album_title(soup)
+
+    # Create a unique subfolder for the album title inside the base directory
+    album_save_directory = ensure_unique_folder(base_save_directory, album_title)
+    os.makedirs(album_save_directory, exist_ok=True)
+
+    # Step 1: Get all media links (images/videos) from the album page
+    media_tile_links = find_media_links(album_url, soup)
+
+    # Large albums are split into ?page=N (100 files each); out-of-range pages
+    # repeat the last one, so stop when a page adds nothing new
+    page = 2
+    while soup.find('a', href=f"?page={page}"):
+        soup = get_soup(f"{album_url.split('?')[0]}?page={page}")
+        new = [l for l in find_media_links(album_url, soup) if l not in media_tile_links] if soup else []
+        if not new:
+            break
+        media_tile_links += new
+        page += 1
+    
+    if not media_tile_links:
+        print(f"No media links found in album {album_url}")
+        return
+
+    # Step 2: Follow each media tile link and extract the download page URL
+    for media_link in media_tile_links:
+        download_link = find_download_link(media_link)
+        if download_link:
+            # Step 3: Get the final media URL from the download page
+            final_media = get_final_media_link(download_link)
+            if final_media:
+                # Step 4: Download the file
+                download_file(*final_media, album_save_directory)
+            else:
+                print(f"Failed to get final media from {download_link}")
+        else:
+            print(f"Failed to find download link on {media_link}")
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Download every file of a Bunkr album, or of every album found by a\n"
+                    "Bunkr search. Paginated albums are followed, files keep their original\n"
+                    "names, and partially downloaded files are resumed when the same folder\n"
+                    "is used again.",
+        epilog="Album files go to OUTPUT/<album title>/ (a ' - 2', ' - 3' suffix is added\n"
+               "if that folder exists). Search results go to\n"
+               "OUTPUT/<Search Terms>/<album title>/.\n\n"
+               "Quote search URLs so the shell leaves '?' and '&' alone, e.g.:\n"
+               "  %(prog)s https://bunkr.cr/a/XXXXXXXX\n"
+               "  %(prog)s -o ~/Downloads 'https://bunkr.cr/?search=some%%20name'",
+        formatter_class=argparse.RawDescriptionHelpFormatter)
+    parser.add_argument('url', help="album URL (https://<domain>/a/<id>) or search URL (containing ?search=)")
+    parser.add_argument('-o', '--output', default=DEFAULT_OUTPUT, metavar='DIR',
+                        help=f"base download folder (default: {DEFAULT_OUTPUT})")
+    args = parser.parse_args()
+
+    url = args.url
+    base_save_directory = os.path.expanduser(args.output)
+
+    # Determine the folder name based on search query
+    if is_search_page(url):
+        search_query = extract_search_query(url)
+        save_directory = os.path.join(base_save_directory, search_query)
+    else:
+        # If it's a direct album link, name the folder based on the album title
+        save_directory = base_save_directory
+
+    # Create the directory if it doesn't exist
+    os.makedirs(save_directory, exist_ok=True)
+
+    # Check if the URL is a search result or a direct album link
+    if is_search_page(url):
+        print(f"Processing search results from {url}")
+        # Get all album links from the search page
+        album_links = find_album_links_from_search(url)
+        
+        if not album_links:
+            print("No albums found in the search results.")
+            return
+        
+        # Process each album found in the search results
+        for album_link in album_links:
+            print(f"Processing album {album_link}")
+            process_album(album_link, save_directory)
+
+    else:
+        # Direct album link, process it
+        print(f"Processing album {url}")
+        process_album(url, save_directory)
+
+if __name__ == "__main__":
+    main()