go-xrpc

Package xrpc provides an implementation of the XRPC protocol used by BlueSky and its AT-Protocol, for the Go programming language.

Documention

Online documentation, which includes examples, can be found at: http://godoc.org/github.com/reiver/go-xrpc

Explanation

XRPC is a client-server protocol. This package implements both the client-side and the server-side of the protocol.

XRPC has 3 requests types:

• executve (called procedure in the XRPC documentation),
• query, and
• subscribe.

This package provides functions for making each of these requests:

• xrpc.Execute()
• xrpc.Query()
• xrpc.Subscribe()

(See examples to see how to use each.)

An XRPC URL needs to be passed to each of these functions. For example:

const url string = "xrpc://public.api.bsky.app/app.bsky.actor.getProfile?actor=reiver.bsky.social"

err := xrpc.Query(dst, url)

This package (introduces and) supports 2 types of XRPC URLs:

• xrpc, and
• xrpc-unencrypted.

For example:

• xrpc://public.api.bsky.app/app.bsky.actor.getProfile?actor=reiver.bsky.social
• xrpc-unencrypted://localhost/app.bsky.actor.getProfile?actor=reiver.bsky.social

Examples

Here is an example of making a 'query' XRPC request:

import "github.com/reiver/go-xrpc"

// ...

var response map[string]any = map[string]any{}

url := "xrpc://public.api.bsky.app/app.bsky.actor.getProfile?actor=reiver.bsky.social"

err := xrpc.Query(&response, url)

XRPC URL Resolution

This package introduces two URL schemes:

• xrpc, and
• xrpc-unencrypted.

For example:

• xrpc://public.api.bsky.app/app.bsky.actor.getProfile?actor=reiver.bsky.social
• xrpc-unencrypted://localhost/app.bsky.actor.getProfile?actor=reiver.bsky.social

Behind-the-scenes the scenes, these XRPC URL schemes are resolved to HTTPS, HTTP, WSS, and WS URLs.

MOST DEVELOPERS WHO ARE JUST MAKING XRPC CLIENT REQUESTS DO NOT HAVE TO WORRY ABOUT THE DETAILS OF THE RESOLUTION. IN THE SAME WAY THAT MOST DEVELOPERS DO NOT HAVE TO WORRY ABOUT HOW HTTP URLS ARE RESOLVED TO TCP.

How an XRPC URL gets resolved to an HTTPS, HTTP, WSS, or WS URL, depends on the XRPC request type.

Here are some examples:

XRPC URL	XRPC Request Type	Resolved URL
xrpc://example.com/app.cherry.fooBar	execute	https://example.com/xrpc/app.cherry.fooBar
xrpc://example.com/app.cherry.fooBar	query	https://example.com/xrpc/app.cherry.fooBar
xrpc://example.com/app.cherry.fooBar	subscribe	wss://example.com/xrpc/app.cherry.fooBar
xrpc-unencrypted://localhost/link.banana.bazQux	execute	http://localhost/xrpc/link.banana.bazQux
xrpc-unencrypted://localhost/link.banana.bazQux	query	http://localhost/xrpc/link.banana.bazQux
xrpc-unencrypted://localhost/link.banana.bazQux	subscribe	ws://localhost/xrpc/link.banana.bazQux

These 2 XRPC URLs are passed to the xrpc.Execute(), xrpc.Query(), and xrpc.Subscribe() functions.

Import

To import package xrpc use import code like the follownig:

import "github.com/reiver/go-xrpc"

Installation

To install package xrpc do the following:

GOPROXY=direct go get https://github.com/reiver/go-xrpc

Author

Package xrpc was written by Charles Iliya Krempeaux