mod_report_affiliations: Fix traceback a non-user is sending a presence For now we won’t touch their presence instead of emiting this traceback: error Traceback[s2s]: /usr/lib/prosody/core/rostermanager.lua:275: attempt to concatenate a nil value (local 'username') stack traceback: /usr/lib/prosody/core/rostermanager.lua:275: in function 'prosody.core.rostermanager.is_user_subscribed' ...ules/mod_report_affiliations/mod_report_affiliations.lua:116: in field '?' /usr/lib/prosody/util/events.lua:81: in function </usr/lib/prosody/util/events.lua:77> (...tail calls...) /usr/lib/prosody/core/stanza_router.lua:184: in upvalue 'core_post_stanza' /usr/lib/prosody/modules/mod_presence.lua:244: in function </usr/lib/prosody/modules/mod_presence.lua:231> (...tail calls...) /usr/lib/prosody/util/events.lua:81: in function </usr/lib/prosody/util/events.lua:77> (...tail calls...) /usr/lib/prosody/core/stanza_router.lua:188: in upvalue 'core_post_stanza' /usr/lib/prosody/core/stanza_router.lua:128: in upvalue 'core_process_stanza' /usr/lib/prosody/modules/mod_s2s.lua:818: in upvalue 'func' /usr/lib/prosody/util/async.lua:149: in function </usr/lib/prosody/util/async.lua:147>

---
depends:
- 'mod\_http'
provides:
- http
---

# Introduction

This module provides a streaming interface to [Prosodys internal statistics][doc:statistics] via
[Server-sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events).

## Example

```js
var evtSource = new EventSource("/stats_stream");

/*
 * An event with all current statistics in the form of a JSON object.
 * Normally sent only once, when first connected to the stream.
 */
evtSource.addEventListener("stats-full", function(e) {
	var initial_stats = JSON.parse(e.data);
	console.log(initial_stats);
}, false);

/*
 * An event containing only statistics that have changed since the last
 * 'stats-full' or 'stats-updated' event.
 */
evtSource.addEventListener("stats-updated", function(e) {
	var updated_stats = JSON.parse(e.data);
	console.log(updated_stats);
}, false);
```

# Compatibility

* Prosody \>= 0.11.0
* Trunk < [5f15ab7c6ae5](https://hg.prosody.im/trunk/rev/5f15ab7c6ae5)