b7bee75e1f
* With the new JWT signatures on photo URLs, it was no longer possible for creative users to embed their gallery photos on their profile page. * Add a function to ReSignPhotoLinks that finds/replaces (on the server side) all references to paths under "/static/photos/" and gives them a fresh ?jwt= query string signature. * Note: only applies to the profile page essays, ReSignPhotoLinks is a template func that must be opted-in on a per page basis. Other miscellaneous fixes * Add "Edit" buttons in the corners of profile cards, when the current user looks at their profile page. They link to URIs like "/settings#profile/about_me" which will now: 1. Select the "Profile settings" tab like #profile 2. Scroll and focus the profile essay field that the user clicked to edit.
119 lines
3.9 KiB
Go
119 lines
3.9 KiB
Go
package photo
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import (
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"strings"
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"time"
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"code.nonshy.com/nonshy/website/pkg/config"
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"code.nonshy.com/nonshy/website/pkg/encryption"
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"code.nonshy.com/nonshy/website/pkg/log"
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"code.nonshy.com/nonshy/website/pkg/models"
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"code.nonshy.com/nonshy/website/pkg/utility"
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"github.com/golang-jwt/jwt/v4"
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)
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// VisibleAvatarURL returns the visible URL image to a user's square profile picture, from the point of view of the currentUser.
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func VisibleAvatarURL(user, currentUser *models.User) string {
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canSee, visibility := user.CanSeeProfilePicture(currentUser)
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if canSee {
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return SignedPublicAvatarURL(user.ProfilePhoto.CroppedFilename)
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}
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switch visibility {
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case models.PhotoPrivate:
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return "/static/img/shy-private.png"
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case models.PhotoFriends:
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return "/static/img/shy-friends.png"
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}
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return "/static/img/shy.png"
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}
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// ReSignPhotoLinks will search a blob of text for photo gallery links ("/static/photos/*") and re-sign
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// their JWT security tokens.
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func ReSignPhotoLinks(currentUser *models.User, text string) string {
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var matches = config.PhotoURLRegexp.FindAllStringSubmatch(text, -1)
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for _, m := range matches {
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var (
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origString = m[0]
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url = m[1]
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filename string
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)
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log.Error("ReSignPhotoLinks: got [%s] url [%s]", origString, url)
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// Trim the /static/photos/ prefix off to get the URL down to its base filename.
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filename = strings.Split(url, "?")[0]
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filename = strings.TrimPrefix(filename, config.PhotoWebPath)
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filename = strings.TrimPrefix(filename, "/")
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// Sign the URL and replace the original.
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signed := SignedPhotoURL(currentUser, filename)
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text = strings.ReplaceAll(text, origString, signed)
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}
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return text
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}
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// SignedPhotoURL returns a URL path to a photo's filename, signed for the current user only.
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func SignedPhotoURL(user *models.User, filename string) string {
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return createSignedPhotoURL(user.ID, user.Username, filename, false)
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}
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// SignedPublicAvatarURL returns a signed URL for a user's public square avatar image, which has
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// a much more generous JWT expiration lifetime on it.
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//
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// The primary use case is for the chat room: users are sent into chat with their avatar URL,
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// and it must be viewable to all users for a long time.
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func SignedPublicAvatarURL(filename string) string {
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return createSignedPhotoURL(0, "@", filename, true)
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}
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// SignedPhotoClaims are a JWT claims object used to sign and authenticate image (direct .jpg) links.
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type SignedPhotoClaims struct {
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FilenameHash string `json:"f"` // Short hash of the Filename being signed.
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Anyone bool `json:"a,omitempty"` // Non-authenticated signature (e.g. public sq avatar URLs)
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// Standard claims. Notes:
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// .Subject = username
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jwt.RegisteredClaims
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}
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// FilenameHash returns a 'short' hash of the filename, for encoding in the SignedPhotoClaims.
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//
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// The hash is a truncated SHA256 hash as a basic validation measure against one JWT token being
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// used to reveal an unrelated picture.
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func FilenameHash(filename string) string {
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return encryption.Hash([]byte(filename))[:6]
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}
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// Common function to create a signed photo URL with an expiration.
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func createSignedPhotoURL(userID uint64, username string, filename string, anyone bool) string {
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// Claims expire on the 10th of next month.
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var (
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expiresAt = utility.NextMonth(time.Now(), 10)
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claims = SignedPhotoClaims{
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FilenameHash: FilenameHash(filename),
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Anyone: anyone,
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RegisteredClaims: encryption.StandardClaims(userID, username, expiresAt),
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}
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)
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// Lock the date stamps for a consistent JWT value for caching.
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claims.IssuedAt = nil
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claims.NotBefore = nil
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log.Debug("createSignedPhotoURL(%s): %+v", filename, claims)
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token, err := encryption.SignClaims(claims, []byte(config.Current.SignedPhoto.JWTSecret))
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if err != nil {
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log.Error("PhotoURL: SignClaims: %s", err)
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}
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// JWT query string to append?
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if token != "" {
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token = "?jwt=" + token
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}
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return URLPath(filename) + token
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}
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