Pydio Cells

Q: How to fix 'Last-Modified time format is invalid' error when syncing image files through Nginx reverse proxy?

Remove the custom header line: ```nginx add_header last-modified $date_gmt; ``` from your Nginx config. This line sets a non‑standard date format (e.g., 'Friday, 02‑Aug‑2024 04:07:53 GMT') that Cells Sync cannot parse. Let the backend (Cells Server) send the correct RFC‑compliant Last‑Modified header instead. If you still need caching, use only the `expires` directive.

2.2k stars·File Management·SHA-256 checksum verified

Pydio Cells is a next-gen file sharing platform for organizations, built with Go and microservices.

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Self-hosted enterprise file sharing platform with Go-based microservices architecture.

Core Features

Granular permission management per user/group/folder
Real-time file sync and version history
Mobile apps and WebDAV access
Enterprise integrations: LDAP, OAuth2, S3, NAS
Microservice architecture for scalability and maintainability

What It Can't Do

•Current README warns that Cells v5 is a work-in-progress development branch; use v4 stable for production. Requires MySQL (no SQLite support). Windows version may have glitches.

Use Cases

Enterprise internal file sharing and collaboration
Secure document management for educational or research teams
Organizations requiring self-hosted data sovereignty and compliance

Detailed Introduction

Pydio Cells is a complete rewrite of the Pydio project using Go and a microservice architecture. It provides secure file sharing, team collaboration, and self-hosted data control for organizations. Features include granular permission management, real-time synchronization, mobile access, and extensive integrations. It's designed for scalability and performance, supporting large deployments with distributed storage backends.

Troubleshooting & FAQ (2)

Troubleshooting

How to fix 'Last-Modified time format is invalid' error when syncing image files through Nginx reverse proxy?

Remove the custom header line:

add_header last-modified $date_gmt;

from your Nginx config. This line sets a non‑standard date format (e.g., 'Friday, 02‑Aug‑2024 04:07:53 GMT') that Cells Sync cannot parse. Let the backend (Cells Server) send the correct RFC‑compliant Last‑Modified header instead. If you still need caching, use only the expires directive.

GitHub Issue #578

Troubleshooting

Why does Pydio Cells generate Collabora URL with '/browser/dist/cool.html' instead of dynamic hash, causing 502 error?

The generated WOPI client URL incorrectly uses the static segment 'dist' instead of the required dynamic hash. As a workaround, manually replace '/browser/dist/' with the correct hash (e.g., '/browser/a246f9ab3c/') found in a working Collabora URL. For a permanent fix, check if the Collabora configuration in Pydio uses the correct endpoint or update to the latest version.

GitHub Issue #723

Getting Started

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Install the software

Double-click the downloaded installer and follow the prompts

Step 1: Download the pre-built binary from official website or build from source

Step 2: Run `./cells configure` to set up database (MySQL 5.6+/MariaDB) and admin account

Step 3: Run `./cells start` and visit https://localhost:8080

Install Guide

Step 1: Download the pre-built binary from official website or build from source
Step 2: Run `./cells configure` to set up database (MySQL 5.6+/MariaDB) and admin account
Step 3: Run `./cells start` and visit https://localhost:8080

File Integrity

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SHA256 Checksum

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Open Source Transparency

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Environment Guide

Uninstall Info

Stop the service, delete the installation and data directories (default /var/cells), and drop the MySQL database. Remove any custom storage if used.

No Extra Dependencies

Ready to use after download. No additional runtime required.

Project Info

LicenseAGPL-3.0

Last Updated2026-06-26 23:10:19

GitHub Repository Official Website

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