Adding documentation for streaming API. Fixing filtering bug

This commit is contained in:
Eugen Rochko 2017-02-02 16:35:06 +01:00
parent 61ce15d94b
commit aa2fa227e9
3 changed files with 44 additions and 1 deletions

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@ -10,6 +10,7 @@ Index
### Using the API
- [API documentation](Using-the-API/API.md)
- [Streaming API documentation](Using-the-API/Streaming-API.md)
- [Testing the API with cURL](Using-the-API/Testing-with-cURL.md)
- [OAuth details](Using-the-API/OAuth-details.md)
- [Tips for app developers](Using-the-API/Tips-for-app-developers.md)

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@ -0,0 +1,40 @@
Streaming API
=============
Your application can use a server-sent events endpoint to receive updates in real-time. Server-sent events is an incredibly simple transport method that relies entirely on chunked-encoding transfer, i.e. the HTTP connection is kept open and receives new data periodically.
### Endpoints:
**GET /api/v1/streaming/user**
Returns events that are relevant to the authorized user, i.e. home timeline and notifications
**GET /api/v1/streaming/public**
Returns all public statuses
**GET /api/v1/streaming/hashtag**
Returns all public statuses for a particular hashtag (query param `tag`)
### Stream contents
The stream will contain events as well as heartbeat comments. Lines that begin with a colon (`:`) can be ignored by parsers, they are simply there to keep the connection open. Events have this structure:
```
event: name
data: payload
```
[See MDN](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#Event_stream_format)
### Event types
|Event|Description|What's in the payload|
|-----|-----------|---------------------|
|`update`|A new status has appeared!|Status|
|`notification`|A new notification|Notification|
|`delete`|A status has been deleted|ID of the deleted status|
The payload is JSON-encoded.

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@ -90,7 +90,9 @@ const streamFrom = (id, req, res, needsFiltering = false) => {
redisClient.on('message', (channel, message) => {
const { event, payload } = JSON.parse(message)
if (needsFiltering) {
// Only messages that may require filtering are statuses, since notifications
// are already personalized and deletes do not matter
if (needsFiltering && event === 'update') {
pgPool.connect((err, client, done) => {
if (err) {
log.error(err)