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package main
import (
"crypto/sha256"
"encoding/base64"
"encoding/json"
"fmt"
"net/http"
"net/url"
"time"
)
type UserMeta struct {
Context []string `json:"@context"`
ID string `json:"id"`
Type string `json:"type"`
Inbox string `json:"inbox"`
Outbox string `json:"outbox"`
PrefferedUsername string `json:"preferredUsername"`
Name string `json:"name"`
Summary string `json:"summary"`
Icon ImageMeta `json:"icon"`
PublicKey PublicKeyMeta `json:"publicKey"`
}
type ImageMeta struct {
Type string `json:"type"`
MediaType string `json:"mediaType"`
URL string `json:"url"`
}
func getSigned(user *User, inbox string) ([]byte, error) {
if u, err := url.Parse(inbox); err == nil {
host := u.Host
path := u.Path
date := time.Now().Format(http.TimeFormat)
stringToSign := fmt.Sprintf("(request-target): get %s\nhost: %s\ndate: %s\ncontent-type: %s", path, host, date, "application/activity+json")
if actSig, err := user.SignBlob("(request-target) host date content-type", stringToSign); err == nil {
c, err := NewHTTPClient("GET", inbox, nil)
if err != nil {
return nil, err
}
return c.DoSigned(host, date, actSig)
} else {
return nil, err
}
} else {
return nil, err
}
}
func postSigned(user *User, data []byte, inbox string) error {
if u, err := url.Parse(inbox); err == nil {
host := u.Host
path := u.Path
date := time.Now().Format(http.TimeFormat)
hashs := sha256.Sum256(data)
digest := base64.StdEncoding.EncodeToString(hashs[:])
stringToSign := fmt.Sprintf("(request-target): post %s\nhost: %s\ndate: %s\ndigest: SHA-256=%s\ncontent-type: %s", path, host, date, digest, "application/activity+json")
if actSig, err := user.SignBlob("(request-target) host date digest content-type", stringToSign); err == nil {
c, err := NewHTTPClient("POST", inbox, data)
if err != nil {
return err
}
_, err = c.DoSignedDigest(host, date, actSig, "SHA-256="+digest)
return err
} else {
return err
}
} else {
return err
}
}
func (user *User) fetchActorInfo(actor string, usecache bool) (*Actor, error) {
// short circuit a check for ourselves...
if actor == user.ID {
return &Actor{ID: user.ID,
Name: user.Name,
UserName: user.UserNamePlain,
Icon: ImageMeta{URL: user.Icon, MediaType: "image/jpeg", Type: "Image"},
Inbox: user.ID + "/inbox",
PublicKey: PublicKeyMeta{PublicKey: user.PublicKey, Owner: user.ID, ID: (user.ID + "#main-key")},
}, nil
}
if usecache {
if data, err := FromCache(user, "actors", "", actor); err == nil {
actor := &Actor{}
if err := json.Unmarshal(data, actor); err == nil {
return actor, nil
}
}
}
if body, err := getSigned(user, actor); err == nil {
actorInfo := &Actor{}
if err := json.Unmarshal([]byte(body), &actorInfo); err == nil {
CacheData(user, "actors", "", actorInfo.ID, []byte(body))
return actorInfo, nil
} else {
return nil, err
}
} else {
return nil, err
}
}
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