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Melody 2024-08-28 17:20:38 +02:00
parent 94197780e1
commit 2977f09245
32 changed files with 763 additions and 936 deletions
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17
ap/common_types.go
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@ -1,17 +0,0 @@
package ap
import "net/url"
type IdType struct {
Id *url.URL
}
type ValueType[T any] struct {
Value T
}
type Media struct {
Type url.URL
MediaType string
Url url.URL
}

58
ap/constants.go
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@ -1,58 +0,0 @@
package ap
const (
KEY_ID = "@id" // Value of type string
KEY_TYPE = "@type" // Value of type string slice / activitystreams object url slice
KEY_VALUE = "@value" // Could be any type really
)
const (
KEY_MASTO_DEVICES = "http://joinmastodon.org/ns#devices"
KEY_MASTO_DISCOVERABLE = "http://joinmastodon.org/ns#discoverable"
KEY_MASTO_FEATURED = "http://joinmastodon.org/ns#featured"
KEY_MASTO_FEATURED_TAGS = "http://joinmastodon.org/ns#featuredTags"
KEY_MASTO_INDEXABLE = "http://joinmastodon.org/ns#indexable"
KEY_MASTO_MEMORIAL = "http://joinmastodon.org/ns#memorial"
)
const (
KEY_W3_INBOX = "http://www.w3.org/ns/ldp#inbox"
KEY_W3_SECURITY_PUBLICKEY = "https://w3id.org/security#publicKey"
KEY_W3_SECURITY_OWNER = "https://w3id.org/security#owner"
KEY_W3_SECURITY_PUBLICKEYPEM = "https://w3id.org/security#publicKeyPem"
)
const (
KEY_ACTIVITYSTREAMS_ALSOKNOWNAS = "https://www.w3.org/ns/activitystreams#alsoKnownAs"
KEY_ACTIVITYSTREAMS_ATTACHMENTS = "https://www.w3.org/ns/activitystreams#attachment"
KEY_ACTIVITYSTREAMS_NAME = "https://www.w3.org/ns/activitystreams#name"
KEY_ACTIVITYSTREAMS_ENDPOINTS = "https://www.w3.org/ns/activitystreams#endpoints"
KEY_ACTIVITYSTREAMS_SHAREDINBOX = "https://www.w3.org/ns/activitystreams#sharedInbox"
KEY_ACTIVITYSTREAMS_FOLLOWERS = "https://www.w3.org/ns/activitystreams#followers"
KEY_ACTIVITYSTREAMS_FOLLOWING = "https://www.w3.org/ns/activitystreams#following"
KEY_ACTIVITYSTREAMS_ICON = "https://www.w3.org/ns/activitystreams#icon"
KEY_ACTIVITYSTREAMS_MEDIATYPE = "https://www.w3.org/ns/activitystreams#mediaType"
KEY_ACTIVITYSTREAMS_URL = "https://www.w3.org/ns/activitystreams#url"
KEY_ACTIVITYSTREAMS_IMAGE = "https://www.w3.org/ns/activitystreams#image"
KEY_ACTIVITYSTREAMS_RESTRICTED_FOLLOW = "https://www.w3.org/ns/activitystreams#manuallyApprovesFollowers"
KEY_ACTIVITYSTREAMS_OUTBOX = "https://www.w3.org/ns/activitystreams#outbox"
KEY_ACTIVITYSTREAMS_PREFFEREDUSERNAME = "https://www.w3.org/ns/activitystreams#preferredUsername"
KEY_ACTIVITYSTREAMS_PUBLISHED = "https://www.w3.org/ns/activitystreams#published"
KEY_ACTIVITYSTREAMS_SUMMARY = "https://www.w3.org/ns/activitystreams#summary"
KEY_ACTIVITYSTREAMS_TAG = "https://www.w3.org/ns/activitystreams#tag"
KEY_ACTIVITYSTREAMS_CC = "https://www.w3.org/ns/activitystreams#cc"
KEY_ACTIVITYSTREAMS_TO = "https://www.w3.org/ns/activitystreams#to"
KEY_ACTIVITYSTREAMS_OBJECT = "https://www.w3.org/ns/activitystreams#object"
// Object types (I think)
// Those are values the object type can have
KEY_ACTIVITYSTREAMS_ACTOR = "https://www.w3.org/ns/activitystreams#actor"
KEY_ACTIVITYSTREAMS_FOLLOW = "https://www.w3.org/ns/activitystreams#Follow"
KEY_ACTIVITYSTREAMS_PERSON = "https://www.w3.org/ns/activitystreams#Person"
KEY_ACTIVITYSTREAMS_CREATE = "https://www.w3.org/ns/activitystreams#Create"
)
const (
KEY_SCHEMA_VALUE = "http://schema.org#value"
)

49
ap/context.go
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@ -1,49 +0,0 @@
package ap
// Just steal this one from sharkey
// Also use this one for all AP objects for now
// Can make a function to extract context from an expanded object later
// TODO: Consider if such a function is worth it or if it would hinder learning
var allContext = map[string]any{
"@context": []any{
"https://www.w3.org/ns/activitystreams",
"https://w3id.org/security/v1",
map[string]any{
"fedibird": "http://fedibird.com/ns#",
"toot": "http://joinmastodon.org/ns#",
"schema": "http://schema.org#",
"misskey": "https://misskey-hub.net/ns#",
"firefish": "https://joinfirefish.org/ns#",
"sharkey": "https://joinsharkey.org/ns#",
"vcard": "http://www.w3.org/2006/vcard/ns#",
"Key": "sec:Key",
"manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
"sensitive": "as:sensitive",
"Hashtag": "as:Hashtag",
"quoteUrl": "as:quoteUrl",
"quoteUri": "fedibird:quoteUri",
"Emoji": "toot:Emoji",
"featured": "toot:featured",
"discoverable": "toot:discoverable",
"PropertyValue": "schema:PropertyValue",
"value": "schema:value",
"_misskey_content": "misskey:_misskey_content",
"_misskey_quote": "misskey:_misskey_quote",
"_misskey_reaction": "misskey:_misskey_reaction",
"_misskey_votes": "misskey:_misskey_votes",
"_misskey_summary": "misskey:_misskey_summary",
"isCat": "misskey:isCat",
"speakAsCat": "firefish:speakAsCat",
"backgroundUrl": "sharkey:backgroundUrl",
"listenbrainz": "sharkey:listenbrainz",
},
},
}

185
ap/examples/masto_account.json
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@ -1,185 +0,0 @@
[
{
"@id": "https://mastodon.social/users/Gargron",
"@type": [
"https://www.w3.org/ns/activitystreams#Person"
],
"http://joinmastodon.org/ns#devices": [
{
"@id": "https://mastodon.social/users/Gargron/collections/devices"
}
],
"http://joinmastodon.org/ns#discoverable": [
{
"@value": true
}
],
"http://joinmastodon.org/ns#featured": [
{
"@id": "https://mastodon.social/users/Gargron/collections/featured"
}
],
"http://joinmastodon.org/ns#featuredTags": [
{
"@id": "https://mastodon.social/users/Gargron/collections/tags"
}
],
"http://joinmastodon.org/ns#indexable": [
{
"@value": true
}
],
"http://joinmastodon.org/ns#memorial": [
{
"@value": false
}
],
"http://www.w3.org/ns/ldp#inbox": [
{
"@id": "https://mastodon.social/users/Gargron/inbox"
}
],
"https://w3id.org/security#publicKey": [
{
"@id": "https://mastodon.social/users/Gargron#main-key",
"https://w3id.org/security#owner": [
{
"@id": "https://mastodon.social/users/Gargron"
}
],
"https://w3id.org/security#publicKeyPem": [
{
"@value": "-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvXc4vkECU2/CeuSo1wtn Foim94Ne1jBMYxTZ9wm2YTdJq1oiZKif06I2fOqDzY/4q/S9uccrE9Bkajv1dnkO Vm31QjWlhVpSKynVxEWjVBO5Ienue8gND0xvHIuXf87o61poqjEoepvsQFElA5ym ovljWGSA/jpj7ozygUZhCXtaS2W5AD5tnBQUpcO0lhItYPYTjnmzcc4y2NbJV8hz 2s2G8qKv8fyimE23gY1XrPJg+cRF+g4PqFXujjlJ7MihD9oqtLGxbu7o1cifTn3x BfIdPythWu5b4cujNsB3m3awJjVmx+MHQ9SugkSIYXV0Ina77cTNS0M2PYiH1PFR TwIDAQAB -----END PUBLIC KEY----- "
}
]
}
],
"https://www.w3.org/ns/activitystreams#alsoKnownAs": [
{
"@id": "https://tooting.ai/users/Gargron"
}
],
"https://www.w3.org/ns/activitystreams#attachment": [
{
"@type": [
"http://schema.org#PropertyValue"
],
"http://schema.org#value": [
{
"@value": "\u003ca href=\"https://www.patreon.com/mastodon\" target=\"_blank\" rel=\"nofollow noopener noreferrer me\" translate=\"no\"\u003e\u003cspan class=\"invisible\"\u003ehttps://www.\u003c/span\u003e\u003cspan class=\"\"\u003epatreon.com/mastodon\u003c/span\u003e\u003cspan class=\"invisible\"\u003e\u003c/span\u003e\u003c/a\u003e"
}
],
"https://www.w3.org/ns/activitystreams#name": [
{
"@value": "Patreon"
}
]
},
{
"@type": [
"http://schema.org#PropertyValue"
],
"http://schema.org#value": [
{
"@value": "\u003ca href=\"https://github.com/Gargron\" target=\"_blank\" rel=\"nofollow noopener noreferrer me\" translate=\"no\"\u003e\u003cspan class=\"invisible\"\u003ehttps://\u003c/span\u003e\u003cspan class=\"\"\u003egithub.com/Gargron\u003c/span\u003e\u003cspan class=\"invisible\"\u003e\u003c/span\u003e\u003c/a\u003e"
}
],
"https://www.w3.org/ns/activitystreams#name": [
{
"@value": "GitHub"
}
]
}
],
"https://www.w3.org/ns/activitystreams#endpoints": [
{
"https://www.w3.org/ns/activitystreams#sharedInbox": [
{
"@id": "https://mastodon.social/inbox"
}
]
}
],
"https://www.w3.org/ns/activitystreams#followers": [
{
"@id": "https://mastodon.social/users/Gargron/followers"
}
],
"https://www.w3.org/ns/activitystreams#following": [
{
"@id": "https://mastodon.social/users/Gargron/following"
}
],
"https://www.w3.org/ns/activitystreams#icon": [
{
"@type": [
"https://www.w3.org/ns/activitystreams#Image"
],
"https://www.w3.org/ns/activitystreams#mediaType": [
{
"@value": "image/png"
}
],
"https://www.w3.org/ns/activitystreams#url": [
{
"@id": "https://files.mastodon.social/accounts/avatars/000/000/001/original/a0a49d80c3de5f75.png"
}
]
}
],
"https://www.w3.org/ns/activitystreams#image": [
{
"@type": [
"https://www.w3.org/ns/activitystreams#Image"
],
"https://www.w3.org/ns/activitystreams#mediaType": [
{
"@value": "image/jpeg"
}
],
"https://www.w3.org/ns/activitystreams#url": [
{
"@id": "https://files.mastodon.social/accounts/headers/000/000/001/original/d13e4417706a5fec.jpg"
}
]
}
],
"https://www.w3.org/ns/activitystreams#manuallyApprovesFollowers": [
{
"@value": false
}
],
"https://www.w3.org/ns/activitystreams#name": [
{
"@value": "Eugen Rochko"
}
],
"https://www.w3.org/ns/activitystreams#outbox": [
{
"@id": "https://mastodon.social/users/Gargron/outbox"
}
],
"https://www.w3.org/ns/activitystreams#preferredUsername": [
{
"@value": "Gargron"
}
],
"https://www.w3.org/ns/activitystreams#published": [
{
"@type": "http://www.w3.org/2001/XMLSchema#dateTime",
"@value": "2016-03-16T00:00:00Z"
}
],
"https://www.w3.org/ns/activitystreams#summary": [
{
"@value": "\u003cp\u003eFounder of \u003cspan class=\"h-card\" translate=\"no\"\u003e\u003ca href=\"https://mastodon.social/@Mastodon\" class=\"u-url mention\"\u003e@\u003cspan\u003eMastodon\u003c/span\u003e\u003c/a\u003e\u003c/span\u003e. Film photography, prog metal, Dota 2. Likes all things analog.\u003c/p\u003e"
}
],
"https://www.w3.org/ns/activitystreams#tag": [],
"https://www.w3.org/ns/activitystreams#url": [
{
"@id": "https://mastodon.social/@Gargron"
}
]
}
]

18
ap/examples/masto_follow_request.json
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@ -1,18 +0,0 @@
[
{
"@id": "https://activitypub.academy/1e8a5594-eff7-4946-86fe-84d82d0a14ae",
"@type": [
"https://www.w3.org/ns/activitystreams#Follow"
],
"https://www.w3.org/ns/activitystreams#actor": [
{
"@id": "https://activitypub.academy/users/dadacio_dashdorrol"
}
],
"https://www.w3.org/ns/activitystreams#object": [
{
"@id": "https://woem.men/users/9n39zo1rfckr00q5"
}
]
}
]

41
ap/examples/mk_note.json
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@ -1,41 +0,0 @@
[
{
"@id": "https://woem.men/notes/9ttp29lhge2u0454",
"@type": [
"https://www.w3.org/ns/activitystreams#Note"
],
"https://www.w3.org/ns/activitystreams#attachment": [],
"https://www.w3.org/ns/activitystreams#attributedTo": [
{
"@id": "https://woem.men/users/9n39zo1rfckr00q5"
}
],
"https://www.w3.org/ns/activitystreams#cc": [
{
"@id": "https://woem.men/users/9n39zo1rfckr00q5/followers"
}
],
"https://www.w3.org/ns/activitystreams#content": [
{
"@value": "\u003cp\u003eTest post, ignore\u003c/p\u003e"
}
],
"https://www.w3.org/ns/activitystreams#published": [
{
"@type": "http://www.w3.org/2001/XMLSchema#dateTime",
"@value": "2024-05-28T08:22:59.861Z"
}
],
"https://www.w3.org/ns/activitystreams#sensitive": [
{
"@value": false
}
],
"https://www.w3.org/ns/activitystreams#tag": [],
"https://www.w3.org/ns/activitystreams#to": [
{
"@id": "https://www.w3.org/ns/activitystreams#Public"
}
]
}
]

70
ap/examples/mk_note_create.json
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@ -1,70 +0,0 @@
[
{
"@id": "https://woem.men/notes/9ttp29lhge2u0454/activity",
"@type": [
"https://www.w3.org/ns/activitystreams#Create"
],
"https://www.w3.org/ns/activitystreams#actor": [
{
"@id": "https://woem.men/users/9n39zo1rfckr00q5"
}
],
"https://www.w3.org/ns/activitystreams#cc": [
{
"@id": "https://woem.men/users/9n39zo1rfckr00q5/followers"
}
],
"https://www.w3.org/ns/activitystreams#object": [
{
"@id": "https://woem.men/notes/9ttp29lhge2u0454",
"@type": [
"https://www.w3.org/ns/activitystreams#Note"
],
"https://www.w3.org/ns/activitystreams#attachment": [],
"https://www.w3.org/ns/activitystreams#attributedTo": [
{
"@id": "https://woem.men/users/9n39zo1rfckr00q5"
}
],
"https://www.w3.org/ns/activitystreams#cc": [
{
"@id": "https://woem.men/users/9n39zo1rfckr00q5/followers"
}
],
"https://www.w3.org/ns/activitystreams#content": [
{
"@value": "\u003cp\u003eTest post, ignore\u003c/p\u003e"
}
],
"https://www.w3.org/ns/activitystreams#published": [
{
"@type": "http://www.w3.org/2001/XMLSchema#dateTime",
"@value": "2024-05-28T08:22:59.861Z"
}
],
"https://www.w3.org/ns/activitystreams#sensitive": [
{
"@value": false
}
],
"https://www.w3.org/ns/activitystreams#tag": [],
"https://www.w3.org/ns/activitystreams#to": [
{
"@id": "https://www.w3.org/ns/activitystreams#Public"
}
]
}
],
"https://www.w3.org/ns/activitystreams#published": [
{
"@type": "http://www.w3.org/2001/XMLSchema#dateTime",
"@value": "2024-05-28T08:22:59.861Z"
}
],
"https://www.w3.org/ns/activitystreams#to": [
{
"@id": "https://www.w3.org/ns/activitystreams#Public"
}
]
}
]

62
ap/explicit_types.go
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@ -1,62 +0,0 @@
package ap
import (
"net/url"
"time"
)
type (
ActivityStreamsAlsoKnownAs IdType
ActivityStreamsAttachment struct {
Type *url.URL
Value string
Name string
}
ActivityStreamsSharedInbox IdType
ActivityStreamsFollowers IdType
ActivityStreamsFollowing IdType
ActivityStreamsImage Media
ActivityStreamsIcon Media
ActivityStreamsRestrictedFollow ValueType[bool]
ActivityStreamsName ValueType[string]
ActivityStreamsOutbox IdType
ActivityStreamsPrefferedUsername ValueType[string]
ActivityStreamsPublished struct {
Type string
Value time.Time
}
ActivityStreamsSummary ValueType[string]
ActivityStreamsUrl IdType
// NOTE: I do not know if this is consistent at all. Do not trust yet
ActivityStreamsTag struct {
Type string
Id string
Name string
}
ActivityStreamsTo IdType
ActivityStreamsCC IdType
ActivityStreamsActor IdType
// NOTE: Technically, objects can have a LOT of data. I don't care. Treat them as ID type
// Just fetch whatever the ID is later on separately and throw away anything else but the ID
ActivityStreamsObject IdType
ActivityStreamsFollow IdType
)
type (
MastoDevices IdType
MastoDiscoverable ValueType[bool]
MastoFeatured IdType
MastoFeaturedTags IdType
MastoIndexable ValueType[bool]
MastoMemorial ValueType[bool]
)
type (
W3Inbox IdType
W3SecurityPublicKey struct {
Id *url.URL
Owner *url.URL
KeyPem string
}
)

27
ap/getRemoteUser.go Normal file
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@ -0,0 +1,27 @@
package ap
import (
"net/http"
"gitlab.com/mstarongitlab/goap"
)
func GetRemoteUser(fullHandle string) (goap.BaseApChain, error) {
webfinger, err := GetAccountWebfinger(fullHandle)
if err != nil {
return nil, err
}
apUrl := ""
for _, link := range webfinger.Links {
if link.Relation == "self" {
apUrl = *link.Href
}
}
apRequest, err := http.NewRequest("GET", apUrl, nil)
if err != nil {
return nil, err
}
apRequest.Header.Add("Accept", "application/activity+json,application/ld+json,application/json")
return nil, nil
}

59
ap/parser.go
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@ -1,59 +0,0 @@
package ap
import (
"encoding/json"
"fmt"
"net/url"
"github.com/piprate/json-gold/ld"
)
type ApThing map[string]any
type RemoteDocumentLoader struct{}
// Try and parse a remote ActivityPub object into a more usable form
// Result is a map[string]any where the keys defined in /ap/constants.go should be usable,
// depending on the type of object
// The general approach for fetching an object will be to fetch the main object
// and only store the ID for sub-objects to fetch them later
func ParseFromUrl(u *url.URL) (ApThing, error) {
opts := ld.NewJsonLdOptions("")
processor := ld.NewJsonLdProcessor()
// TODO: Add custom document parser (copy default implementation) that includes verification
// Explanation:
// Expansion removes the context from a document (json-ld activitypub data)
// and turns every field into something along the lines of
// "https://example.com/ns#ObjectType": <Insert data for that object here>
// This makes it easier to deal with things as they now have a very consistent naming scheme
// See /ap/constants.go for those
parsed, err := processor.Expand(u.String(), opts)
if err != nil {
return nil, fmt.Errorf("failed to process remote document: %w", err)
}
if len(parsed) == 0 {
return nil, fmt.Errorf("document has a length of 0")
}
typed, ok := parsed[0].(ApThing)
if !ok {
return nil, fmt.Errorf("couldn't cast data to ApThing")
}
return typed, nil
}
// Compact an AP object down into a compressed json-ld form
// That compacted form should be accepted by all AP servers
// It also handles context for any fields
// Content should only use keys defined in /ap/constants.go though
// Other things might get lost in translation
func Compact(content map[string]any) ([]byte, error) {
opts := ld.NewJsonLdOptions("")
processor := ld.NewJsonLdProcessor()
res, err := processor.Compact(content, allContext, opts)
if err != nil {
return nil, fmt.Errorf("failed to compact data: %w", err)
}
return json.Marshal(res)
}

172
ap/type_parsers.go
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@ -1,172 +0,0 @@
package ap
import (
"net/url"
"time"
)
// Try and parse a value into an IdType
// Returns nil if failed
func TryParseIdType(rawIn any) *IdType {
switch in := rawIn.(type) {
case []any:
if len(in) == 0 {
return nil
}
m, ok := in[0].(map[string]any)
if !ok {
return nil
}
return TryParseIdType(m)
case map[string]any:
vRaw, ok := in[KEY_ID]
if !ok {
return nil
}
v, ok := vRaw.(string)
if !ok {
return nil
}
u, err := url.Parse(v)
if err != nil {
return nil
}
return &IdType{
Id: u,
}
default:
return nil
}
}
func TryParseValueType[T any](rawIn any) *ValueType[T] {
switch in := rawIn.(type) {
case map[string]any:
vRaw, ok := in[KEY_ID]
if !ok {
return nil
}
v, ok := vRaw.(T)
if !ok {
return nil
}
return &ValueType[T]{
Value: v,
}
case []any:
if len(in) == 0 {
return nil
}
v, ok := in[0].(map[string]any)
if !ok {
return nil
}
return TryParseValueType[T](v)
default:
return nil
}
}
func TryParseActivityStreamsPublicKey(rawIn any) *W3SecurityPublicKey {
switch in := rawIn.(type) {
case map[string]any:
asIdType := TryParseIdType(in)
if asIdType == nil {
return nil
}
ownerType := TryParseIdType(in[KEY_W3_SECURITY_OWNER])
if ownerType == nil {
return nil
}
keyValue := TryParseValueType[string](in[KEY_W3_SECURITY_PUBLICKEYPEM])
if keyValue == nil {
return nil
}
return &W3SecurityPublicKey{
Id: asIdType.Id,
Owner: ownerType.Id,
KeyPem: keyValue.Value,
}
case []any:
if len(in) == 0 {
return nil
}
return TryParseActivityStreamsPublicKey(in[0])
default:
return nil
}
}
func TryParseActivityStreamsAttachment(rawIn any) *ActivityStreamsAttachment {
switch in := rawIn.(type) {
case []any:
if len(in) == 0 {
return nil
}
return TryParseActivityStreamsAttachment(in[0])
case map[string]any:
rawType, ok := in[KEY_TYPE]
if !ok {
return nil
}
strType, ok := rawType.(string)
if !ok {
return nil
}
urlType, err := url.Parse(strType)
if err != nil {
return nil
}
value := TryParseValueType[string](in[KEY_SCHEMA_VALUE])
if value == nil {
return nil
}
name := TryParseValueType[string](in[KEY_ACTIVITYSTREAMS_NAME])
if name == nil {
return nil
}
return &ActivityStreamsAttachment{
Type: urlType,
Name: name.Value,
Value: value.Value,
}
default:
return nil
}
}
func TryParseActivityStreamsPublished(rawIn any) *ActivityStreamsPublished {
switch in := rawIn.(type) {
case []any:
if len(in) == 0 {
return nil
}
return TryParseActivityStreamsPublished(in[0])
case map[string]any:
rawType, ok := in[KEY_TYPE]
if !ok {
return nil
}
strType, ok := rawType.(string)
if !ok {
return nil
}
value := TryParseValueType[string](in)
tv, err := time.Parse("2006-01-02T04:05:06Z", value.Value)
if err != nil {
return nil
}
return &ActivityStreamsPublished{
Type: strType,
Value: tv,
}
default:
return nil
}
}
// NOTE: Since I do not know if tags are consistent with the struct yet,
// This funtion does not do anything yet and should not be used
func TryParseActivityStreamsTag(rawIn any) *ActivityStreamsTag {
return nil
}

19
ap/util.go Normal file
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@ -0,0 +1,19 @@
package ap
import "strings"
type InvalidFullHandleError struct {
Raw string
}
func (i InvalidFullHandleError) Error() string {
return "Invalid full handle"
}
func SplitFullHandle(full string) (string, string, error) {
splits := strings.Split(strings.TrimPrefix(full, "@"), "@")
if len(splits) != 2 {
return "", "", InvalidFullHandleError{}
}
return splits[0], splits[1], nil
}

87
ap/webfinger.go Normal file
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@ -0,0 +1,87 @@
package ap
import (
"encoding/json"
"errors"
"io"
"net/http"
"time"
)
// Data returned from a webfinger response (and also sent when asked for an account via webfinger)
type WebfingerData struct {
// What this webfinger data refers to. Accounts are usually `acct:username@host`
Subject string `json:"subject"`
// List of links related to the account
Links []struct {
// What type of link this is
// - `self` refers to the activitypub object and has Type and Href set
// - `http://webfinger.net/rel/profile-page` refers to the public webpage of the account and has Type and Href set
// - `http://ostatus.org/schema/1.0/subscribe` provides a template for subscribing/following the account. Has Template set
// Template will contain a `{uri}` part with which to replace idk yet
Relation string `json:"rel"`
// The content type of the url
Type *string `json:"type"`
// The url
Href *string `json:"href"`
// Template to use for something
Template *string `json:"template"`
} `json:"links"`
}
var ErrAccountNotFound = errors.New("account not found")
var ErrRemoteServerFailed = errors.New("remote server errored out")
// Get the webfinger data for a given full account handle (like @bob@example.com or bob@example.com)
func GetAccountWebfinger(fullHandle string) (*WebfingerData, error) {
// First get the handle and server domain from the full handle (and ensure it's a correctly formatted one)
handle, server, err := SplitFullHandle(fullHandle)
if err != nil {
return nil, err
}
webfingerRequest, err := http.NewRequest(
// Webfinger requests are GET
"GET",
// The webfinger url is located at <domain>/.well-known/webfinger
// The url parameter `resource` tells the remote server what data we want, should always be an account
// The prefix `acct:<full-handle>` (where full-handle is in the form of bob@example.com)
// tells the remote server that we want the account data of the given account handle
"https://"+server+"/.well-known/webfinger?resource=acct:"+handle+"@"+server,
// No request body since it's a get request and we only need the url parameter
nil,
)
if err != nil {
return nil, err
}
// Make a http client with a timeout limit of 30 seconds
client := http.Client{Timeout: time.Second * 30}
// Then send the request
result, err := client.Do(webfingerRequest)
if err != nil {
return nil, err
}
// Code 404 indicates that the account doesn't exist
if result.StatusCode == 404 {
return nil, ErrAccountNotFound
} else if result.StatusCode != 200 {
// And anything other than 200 or 404 is an error for now
// TODO: Add information gathering here to figure out what the remote server's problem is
return nil, ErrRemoteServerFailed
}
// Get the body data from the response
data, err := io.ReadAll(result.Body)
if err != nil {
return nil, err
}
// Then try and parse it into webfinger data
webfinger := WebfingerData{}
err = json.Unmarshal(data, &webfinger)
if err != nil {
return nil, err
}
return &webfinger, nil
}