File

mod_pubsub_post/README.markdown @ 4409:44f6537f6427

mod_invites_adhoc: Fail contact invite if user is not on current host Only the username was being used, and the host of the requester ignored. Luckily this only affects admins of the host. If they want to create an account they can use the other command. If they want to create a contact they should request from their account on this host.
author Matthew Wild <mwild1@gmail.com>
date Thu, 28 Jan 2021 07:04:11 +0000
parent 3719:a6db99c1420a
child 4552:c87181a98f29
line wrap: on
line source

---
labels:
- 'Stage-Stable'
summary: Publish to PubSub nodes from via HTTP POST/WebHooks
---

# Introduction

This module is a fairly generic WebHook receiver that lets you easily
publish data to PubSub using a HTTP POST request. The payload can be
Atom feeds, arbitrary XML, or arbitrary JSON. The type should be
indicated via the `Content-Type` header.

-   JSON data is wrapped in a [XEP-0335] container.
-   An Atom feed may have many `<entry>` and each one is published as
    its own PubSub item.
-   Other XML is simply published to a randomly named item as-is.

## JSON example

``` {.bash}
curl http://localhost:5280/pubsub_post/princely_musings \
    -H "Content-Type: application/json" \
    --data-binary '{"musing":"To be, or not to be: that is the question"}'
```

## Atom example

``` {.bash}
curl http://localhost:5280/pubsub_post/princely_musings \
    -H "Content-Type: application/xml" \
    --data-binary '<feed xmlns="http://www.w3.org/2005/Atom">
        <entry><title>Hello</title></entry></feed>'

```

# Configuration

All settings are optional.

## Actor identification

First we have to figure out who is making the request.
This is configured on a per-node basis like this:

``` {.lua}
-- Per node secrets
pubsub_post_actors = {
    princely_musings = "hamlet@denmark.lit"
}
pubsub_post_default_actor = "nobody@nowhere.invalid"
```

`pubsub_post_default_actor` is used when trying to publish to a node
that is not listed in `pubsub_post_actors`. Otherwise the IP address
of the connection is used.

## Authentication

[WebSub](https://www.w3.org/TR/2018/REC-websub-20180123/) [Authenticated
Content
Distribution](https://www.w3.org/TR/2018/REC-websub-20180123/#authenticated-content-distribution)
authentication is used.

``` {.lua}
pubsub_post_secrets = {
    princely_musings = "shared secret"
}
pubsub_post_default_secret = "default secret"
```

`pubsub_post_default_secret` is used when trying to publish to a node
that is not listed in `pubsub_post_secrets`. Otherwise the request
proceeds with the previously identified actor.

::: {.alert .alert-danger}
If configured without a secret and a default actor that has permission
to create nodes the service becomes wide open.
:::

## Authorization

Authorization is handled via pubsub affiliations. Publishing requires an
affiliation with the _publish_ capability, usually `"publisher"`.

### Setting up affiliations

Prosodys PubSub module supports [setting affiliations via
XMPP](https://xmpp.org/extensions/xep-0060.html#owner-affiliations), in
trunk since [revision
384ef9732b81](https://hg.prosody.im/trunk/rev/384ef9732b81), so
affiliations can be configured with a capable client.

It can however be done from another plugin:

``` {.lua}
local mod_pubsub = module:depends("pubsub");
local pubsub = mod_pubsub.service;

pubsub:create("princely_musings", true);
pubsub:set_affiliation("princely_musings", true, "127.0.0.1", "publisher");
```