Nextcloud - Mirage

The Nextcloud resource mounts a WebDAV server (Nextcloud, ownCloud, Hetzner Storage Share, or any generic WebDAV endpoint) at some prefix such as /nc/. Reads are async and streaming, with range requests for partial reads. For credential setup, see Nextcloud Setup.

Config

import os

from mirage import MountMode, Workspace
from mirage.resource.nextcloud import NextcloudConfig, NextcloudResource

config = NextcloudConfig(
    url=os.environ["NEXTCLOUD_URL"],
    username=os.environ["NEXTCLOUD_USERNAME"],
    password=os.environ["NEXTCLOUD_PASSWORD"],
    # Optional:
    # verify_ssl=True,
    # timeout=30,
)
resource = NextcloudResource(config)
ws = Workspace({"/nc/": resource}, mode=MountMode.WRITE)

NextcloudResource(config) takes a NextcloudConfig object with the WebDAV URL plus optional Basic Auth credentials. Both READ and WRITE modes are supported. Use an app password (Settings → Security in Nextcloud) rather than your account password.

Filesystem Layout

WebDAV resources map directly to virtual paths under the mount prefix. For example, if your Nextcloud root contains:

Documents/notes.md
Documents/contract.pdf
Photos/2024/cat.jpg

Then mounting at /nc/ exposes:

/nc/
  Documents/
    notes.md
    contract.pdf
  Photos/
    2024/
      cat.jpg

Path mapping: virtual /nc/Documents/notes.md issues HTTP requests against <NEXTCLOUD_URL>/Documents/notes.md.

Cache

The Nextcloud resource uses IndexCacheStore. Directory listings come from a single PROPFIND Depth: 1 and populate file size, type, and ETag entries that stat reads via a fast path, so a readdir followed by per-entry stat calls (which is what ls, FUSE getattr, and most shell commands trigger) costs one HTTP request instead of N.

Fingerprinting and Snapshots

SUPPORTS_SNAPSHOT = True. Per-file fingerprints come from the WebDAV getetag property, so snapshot drift detection works automatically: when a remote file changes, its ETag changes, and Mirage notices on the next access.

Example

import asyncio
import os

from dotenv import load_dotenv

from mirage import MountMode, Workspace
from mirage.resource.nextcloud import NextcloudConfig, NextcloudResource

load_dotenv(".env.development")

config = NextcloudConfig(
    url=os.environ["NEXTCLOUD_URL"],
    username=os.environ["NEXTCLOUD_USERNAME"],
    password=os.environ["NEXTCLOUD_PASSWORD"],
)
resource = NextcloudResource(config)


async def main() -> None:
    ws = Workspace({"/nc/": resource}, mode=MountMode.WRITE)

    r = await ws.execute("ls /nc/")
    print(await r.stdout_str())

    r = await ws.execute("tree /nc/")
    print(await r.stdout_str())

    r = await ws.execute("find /nc/ -name '*.md'")
    print(await r.stdout_str())

    r = await ws.execute("cat /nc/Documents/notes.md")
    print(await r.stdout_str())

    r = await ws.execute("grep TODO /nc/Documents/notes.md")
    print(await r.stdout_str())

    r = await ws.execute("stat /nc/Documents/notes.md")
    print(await r.stdout_str())


if __name__ == "__main__":
    asyncio.run(main())

Shell Commands

The Nextcloud resource supports the full set of shell commands since it operates on real file content (text, binary, JSON, CSV, etc.). Reads benefit from HTTP Range requests so commands like head -c BYTES don’t pull the whole file.

Read Commands

Command	Notes
`cat`	Read file content
`head` / `tail`	First/last N lines
`grep` / `rg`	Pattern search (file or directory level)
`jq`	Query JSON fields
`wc`	Line/word/byte counts
`stat`	File metadata (name, size, type, modified)
`find`	Recursive search with `-name`, `-maxdepth`
`tree`	Directory tree view
`nl`	Number lines
`du`	Disk usage summary
`file`	Detect file type
`strings`	Extract printable strings from binary
`xxd`	Hex dump
`md5`	MD5 checksum
`sha256sum`	SHA-256 checksum

Text Processing

Command	Notes
`awk`	Pattern scanning and processing
`sed`	Stream editor
`tr`	Translate or delete characters
`sort`	Sort lines
`uniq`	Remove duplicate lines
`cut`	Extract fields/columns
`join`	Join lines on a common field
`paste`	Merge lines side by side
`column`	Columnate output
`fold`	Wrap lines to a specified width
`expand`	Convert tabs to spaces
`unexpand`	Convert spaces to tabs
`fmt`	Simple text formatter
`rev`	Reverse lines
`tac`	Concatenate and print in reverse
`look`	Display lines beginning with a given string
`shuf`	Shuffle lines
`tsort`	Topological sort
`comm`	Compare two sorted files
`cmp`	Compare two files byte by byte
`diff`	Compare files line by line
`patch`	Apply a diff patch
`iconv`	Character encoding conversion

File Operations

Command	Notes
`cp`	Copy files (WebDAV `COPY` method)
`mv`	Move/rename files (WebDAV `MOVE` method)
`rm`	Remove files (WebDAV `DELETE`; recursive for directories)
`mkdir`	Create directories (WebDAV `MKCOL`)
`touch`	Create empty file or update timestamp
`ln`	Create symbolic links
`tee`	Write stdin to file and stdout
`mktemp`	Create temporary file
`split`	Split file into pieces
`csplit`	Split file by context

Path Utilities

Command	Notes
`basename`	Strip directory from path
`dirname`	Strip filename from path
`realpath`	Resolve path
`readlink`	Print symbolic link target
`ls`	List directory contents

Compression

Command	Notes
`gzip`	Compress files
`gunzip`	Decompress gzip files
`zip`	Create zip archives
`unzip`	Extract zip archives
`tar`	Archive files
`zcat`	Cat compressed files
`zgrep`	Grep compressed files

Encoding

Command	Notes
`base64`	Base64 encode/decode

Data Format Support

Commands with format-specific variants for structured data files:

Format	Extension	Variants
Parquet	`.parquet`	cat, head, tail, wc, stat, cut, grep, ls, file
Feather	`.feather`	cat, head, tail, wc, stat, cut, grep, ls, file
ORC	`.orc`	cat, head, tail, wc, stat, cut, grep, ls, file
HDF5	`.hdf5`	cat, head, tail, wc, stat, cut, grep, ls, file

These variants auto-detect the format by extension and convert to tabular text (CSV) for processing.

Streaming

Reads: streamed in chunks. Downstream commands like head -n 1 early-cancel, so you only pay for the first chunk over the wire.
Range reads: head -c BYTES and other partial reads issue HTTP Range requests that Nextcloud and most WebDAV servers honor.
Writes: buffer the payload before upload. Streaming uploads (Nextcloud’s uploads/ resumable protocol) are a possible future follow-up.

Use Cases

AI agents accessing personal cloud storage: Mount Nextcloud so agents can read documents, notes, and structured data on a self-hosted cloud.
Self-hosted alternative to Dropbox/Box: Same shell-command surface, with full read+write support.
Multi-protocol WebDAV: Works against any RFC 4918-compliant server, not just Nextcloud.
FUSE mounting: Expose Nextcloud through a virtual FUSE mount for external tools.

​Config

​Filesystem Layout

​Cache

​Fingerprinting and Snapshots

​Example

​Shell Commands

​Read Commands

​Text Processing

​File Operations

​Path Utilities

​Compression

​Encoding

​Data Format Support

​Streaming

​Use Cases