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add more activitypub details to READING

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Johann150 2023-03-22 23:03:10 +01:00
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READING.md
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@ -40,15 +40,27 @@ After that the actual endpoint code is run by `call.ts` after checking some more
ActivityPub related code is in `/packages/backend/src/remote/activitypub/`
Both incoming and outgoing ActivityPub request are handled through queues, to e.g. allow for retrying a request when it fails, or spikes of many incoming requests.
#### Incoming Activities
Remote ActivityPub implementations will HTTP POST to the resource `/user/:userId/inbox` or `/inbox` (the latter is also known as the "shared inbox").
The behaviour for these routes is exactly the same: They add all the received data into the inbox queue.
This is defined in `/packages/backend/src/server/activitypub.ts`.
The inbox processor will do some basic things like verify signatures.
Incoming ActivityPub requests are processed by the code in `kernel/`.
The files/directories are generally named the same as the Activities that they process, which should help with orientation.
The entry point for processing an activity is `processOneActivity` in the `kernel/index.ts` file in that directory.
Parts of incoming activities may also be processed by `models/`.
The bodys of outgoing ActivityPub requests are "rendered" using `renderer/`.
#### Outgoing Activities
Outgoing activities are usually initiated in the logic of the API endpoints.
The bodies of outgoing ActivityPub requests are "rendered" using `renderer/`.
These files define several functions that are meant to be used together, e.g. `renderCreate(await renderNote(note, false), note)`.
The invocation of these functions is placed either in the API endpoints directly or in the services code.
Both incoming and outgoing ActivityPub request are handled through queues, to e.g. allow for retrying a request when it fails, or spikes of many incoming requests.
The rendered bodies of the functions and the recipients are put into the deliver queue to be delivered.
### Services