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Package buffer-php
Short Description Buffer for PHP — the service descriptor, its faker, its webhook verification, one class per operation, and a fancy-flow-php executor per node. Plain HTTP on particle-academy/fancy-connector-core; no vendor SDK.
License MIT
Homepage https://github.com/Fancy-Friends/buffer
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Informations about the package buffer-php
Buffer
Buffer for fancy-flow — as four imported, versioned packages, one per runtime. Not vendored source: a copy cannot be upgraded, and third-party APIs change.
| Runtime | Package | Install |
|---|---|---|
| Authoring surface (every host) | @particle-academy/buffer-ui |
npm install @particle-academy/buffer-ui |
| Node | @particle-academy/buffer-js |
npm install @particle-academy/buffer-js |
| PHP 8.4+ | particle-academy/buffer-php |
composer require particle-academy/buffer-php |
| Python 3.11+ | fancy-buffer |
pip install fancy-buffer |
The ui package is the editor surface and is React on every host — a PHP or
Python project installs it and its own runtime package, and never the js one.
What it costs you
One dependency: @particle-academy/fancy-connector-core (or
particle-academy/fancy-connector-core on Composer), which the js and php
packages pull in themselves. The Python package has zero runtime
dependencies.
No Buffer SDK. Plain HTTP, deliberately: a vendor SDK is third-party code subject to the kit's full approval bar, and one per provider is hundreds of dependencies nobody is tracking.
Setting it up
Everything below is generated from provider/manifest.json, so it cannot disagree with what the packages do.
Credentials
A Buffer connection holds 4 values.
Two kinds of value, and mixing them up matters. A provider credential is ONE value for the whole installation — an OAuth app's client secret serves every connected account. An account credential is one per connected account. A host that stores the second where it stores the first lets one account's credentials reach another's.
| Field | Scope | Secret | Where it comes from |
|---|---|---|---|
| OAuth client ID | per installation | not secret | From the Buffer App Client registered under Settings -> API; one value for the whole installation. |
| OAuth client secret | per installation | secret | For a confidential App Client. Buffer still requires PKCE in addition to this secret, not instead of it. |
| Access token | per connected account | secret | Per connected Buffer user. It expires after one hour and is sent as a Bearer token. |
| Rotating refresh token | per connected account | secret | Per connected user and single-use. Replace it atomically after every refresh; replaying an old value revokes the grant. |
Authorising
Buffer uses OAuth2 (authorization_code). The package DECLARES the exchange; the HOST performs it — a consent screen needs a browser, a redirect URI and somewhere to persist the result, and all three belong to the host.
- Authorize URL — https://auth.buffer.com/auth
- Token URL — https://auth.buffer.com/token
- Scopes —
posts:write,offline_access - Access token lifetime — 3600 seconds (1 hours). A host that never refreshes works all afternoon and is broken by morning.
- PKCE is REQUIRED (
S256). Generate a verifier per authorization, send its challenge on the authorize call, and send the verifier itself on the token exchange — so it has to survive between two separate requests. Without it the exchange is refused outright.
The refresh tokens ROTATE, and they are single use. Every refresh returns a new one and spends the one submitted, so replaying a spent token revokes the ENTIRE grant — the user is signed out, with nothing in the failure that says why.
Two consequences, both of which a host gets wrong by default:
- Do not RETRY a failed refresh with the same token. A response that arrived but was not persisted — a crash between the reply and the write — turns the reflexive retry into a replay.
- Do not refresh CONCURRENTLY. Two workers refreshing at once means one of them replays.
Persist the returned token before using the access token it came with.
The estate
Buffer has no test estate, and somebody checked. Everything this connector does is real. Use the faker to build against it.
Buffer has no separate test estate. createPost writes to a real Buffer channel and can publish to the connected social account. Use fake mode while building, then test against a deliberately private or disposable real channel.
What it can do
Actions
post_create — Buffer post
Create or queue a text post in Buffer.
POST / · unsafe to replay — a retried durable run does it TWICE
| Input | Required | What it is |
|---|---|---|
channelId |
yes | The Buffer channel that will own and publish the post. |
text |
yes | The text Buffer stores for the post. Network-specific length and content rules still apply at mutation time. |
schedulingType |
yes | Automatic publishing sends through the connected network; notification publishing asks the user to finish through Buffer's notification workflow. |
shareMode |
yes | Add to the normal queue, publish now, or place it next in line. |
Run it before you have credentials
Every operation ships a faker, whether or not Buffer has a sandbox. Set a
node's mode to fake and it returns the shape Buffer actually publishes — the
same field names, deterministically — so you can wire the downstream nodes before
touching an account, a key, or a network.
This repository is generated
provider/ is the source. Everything under packages/ is emitted from it and
must not be hand-edited — CI regenerates and diffs on every push, and the
next protocol sync destroys anything it finds. See AGENTS.md.
Two namespaces, which do not match on purpose
The repo is github.com/Fancy-Friends/buffer; the packages publish under
particle-academy. Nothing derives one from the other — the names come from
weaver's friends.json and nowhere else.
Licence
MIT.
