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Add favicons to external link previews (#4788)

This commit is contained in:
Ibrahem Khalil 2024-03-12 22:47:51 +02:00 committed by GitHub
parent 43bc6e4b83
commit 8c0e24dc26
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GPG Key ID: B5690EEEBB952194
17 changed files with 633 additions and 312 deletions
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2
VERSION
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@ -1 +1 @@
0.176.7
0.176.8

BIN
_assets/tests/wikipedia.ico Normal file
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Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 2.7 KiB

34
images/decode.go
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@ -11,13 +11,35 @@ import (
"io/ioutil"
"net/http"
"os"
"regexp"
"time"
"unicode/utf8"
"golang.org/x/image/webp"
"github.com/ethereum/go-ethereum/log"
)
var (
htmlCommentRegex = regexp.MustCompile(`(?i)<!--([\\s\\S]*?)-->`)
svgRegex = regexp.MustCompile(`(?i)^\s*(?:<\?xml[^>]*>\s*)?(?:<!doctype svg[^>]*>\s*)?<svg[^>]*>[^*]*<\/svg>\s*$`)
)
// IsSVG returns true if the given buffer is a valid SVG image.
func IsSVG(buf []byte) bool {
var isBinary bool
if len(buf) < 24 {
isBinary = false
}
for i := 0; i < 14; i++ {
charCode, _ := utf8.DecodeRuneInString(string(buf[i]))
if charCode == 65533 || charCode <= 8 {
isBinary = true
}
}
return !isBinary && svgRegex.Match(htmlCommentRegex.ReplaceAll(buf, []byte{}))
}
func Decode(fileName string) (image.Image, error) {
file, err := os.Open(fileName)
if err != nil {
@ -109,6 +131,8 @@ func GetType(buf []byte) ImageType {
return GIF
case IsWebp(buf):
return WEBP
case IsIco(buf):
return ICO
default:
return UNKNOWN
}
@ -124,6 +148,10 @@ func GetMimeType(buf []byte) (string, error) {
return "gif", nil
case IsWebp(buf):
return "webp", nil
case IsIco(buf):
return "ico", nil
case IsSVG(buf):
return "svg", nil
default:
return "", errors.New("image format not supported")
}
@ -153,6 +181,12 @@ func IsWebp(buf []byte) bool {
buf[10] == 0x42 && buf[11] == 0x50
}
func IsIco(buf []byte) bool {
return len(buf) > 4 &&
buf[0] == 0 && buf[1] == 0 && buf[2] == 1 || buf[2] == 2 &&
buf[4] > 0
}
func GetImageDimensions(imgBytes []byte) (int, int, error) {
// Decode image bytes
img, _, err := image.Decode(bytes.NewReader(imgBytes))

27
images/encode_test.go
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@ -110,3 +110,30 @@ func TestGetPayloadFromURI(t *testing.T) {
payload,
)
}
func TestIsSvg(t *testing.T) {
GoodSVG := []byte(`<svg width="300" height="130" xmlns="http://www.w3.org/2000/svg">
  <rect width="200" height="100" x="10" y="10" rx="20" ry="20" fill="blue" />
Sorry, your browser does not support inline SVG.
</svg>`)
BadSVG := []byte(`<head>
<link rel="stylesheet" href="styles.css">
</head>`)
require.Equal(t, IsSVG(BadSVG), false)
require.Equal(t, IsSVG(GoodSVG), true)
}
func TestIsIco(t *testing.T) {
GoodICO, err := Asset("_assets/tests/wikipedia.ico")
require.NoError(t, err)
GoodPNG, err := Asset("_assets/tests/qr/defaultQR.png")
require.NoError(t, err)
require.Equal(t, IsIco(GoodICO), true)
require.Equal(t, IsIco(GoodPNG), false)
require.Equal(t, IsPng(GoodPNG), true)
require.Equal(t, IsPng(GoodICO), false)
}

1
images/meta.go
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@ -8,6 +8,7 @@ const (
PNG
GIF
WEBP
ICO
)
const (

230
images/qr-assets.go
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File diff suppressed because one or more lines are too long

33
protocol/common/message_linkpreview.go
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@ -15,8 +15,8 @@ type MakeMediaServerURLType func(msgID string, previewURL string, imageID MediaS
type MakeMediaServerURLMessageWrapperType func(previewURL string, imageID MediaServerImageID) string
type LinkPreviewThumbnail struct {
Width int `json:"width"`
Height int `json:"height"`
Width int `json:"width,omitempty"`
Height int `json:"height,omitempty"`
// Non-empty when the thumbnail is available via the media server, i.e. after
// the chat message is sent.
URL string `json:"url,omitempty"`
@ -31,6 +31,7 @@ type LinkPreview struct {
Hostname string `json:"hostname"`
Title string `json:"title,omitempty"`
Description string `json:"description,omitempty"`
Favicon LinkPreviewThumbnail `json:"favicon,omitempty"`
Thumbnail LinkPreviewThumbnail `json:"thumbnail,omitempty"`
}
@ -288,12 +289,19 @@ func (m *Message) ConvertLinkPreviewsToProto() ([]*protobuf.UnfurledLink, error)
return nil, fmt.Errorf("invalid link preview, url='%s': %w", preview.URL, err)
}
var payload []byte
var thumbnailPayload []byte
var faviconPayload []byte
var err error
if preview.Thumbnail.DataURI != "" {
payload, err = images.GetPayloadFromURI(preview.Thumbnail.DataURI)
thumbnailPayload, err = images.GetPayloadFromURI(preview.Thumbnail.DataURI)
if err != nil {
return nil, fmt.Errorf("could not get data URI payload, url='%s': %w", preview.URL, err)
return nil, fmt.Errorf("could not get data URI payload for link preview thumbnail, url='%s': %w", preview.URL, err)
}
}
if preview.Favicon.DataURI != "" {
faviconPayload, err = images.GetPayloadFromURI(preview.Favicon.DataURI)
if err != nil {
return nil, fmt.Errorf("could not get data URI payload for link preview favicon, url='%s': %w", preview.URL, err)
}
}
@ -304,7 +312,8 @@ func (m *Message) ConvertLinkPreviewsToProto() ([]*protobuf.UnfurledLink, error)
Description: preview.Description,
ThumbnailWidth: uint32(preview.Thumbnail.Width),
ThumbnailHeight: uint32(preview.Thumbnail.Height),
ThumbnailPayload: payload,
ThumbnailPayload: thumbnailPayload,
FaviconPayload: faviconPayload,
}
unfurledLinks = append(unfurledLinks, ul)
}
@ -312,7 +321,8 @@ func (m *Message) ConvertLinkPreviewsToProto() ([]*protobuf.UnfurledLink, error)
return unfurledLinks, nil
}
func (m *Message) ConvertFromProtoToLinkPreviews(makeMediaServerURL func(msgID string, previewURL string) string) []LinkPreview {
func (m *Message) ConvertFromProtoToLinkPreviews(makeThumbnailMediaServerURL func(msgID string, previewURL string) string,
makeFaviconMediaServerURL func(msgID string, previewURL string) string) []LinkPreview {
var links []*protobuf.UnfurledLink
if links = m.GetUnfurledLinks(); links == nil {
@ -340,13 +350,20 @@ func (m *Message) ConvertFromProtoToLinkPreviews(makeMediaServerURL func(msgID s
}
mediaURL := ""
if len(link.ThumbnailPayload) > 0 {
mediaURL = makeMediaServerURL(m.ID, link.Url)
mediaURL = makeThumbnailMediaServerURL(m.ID, link.Url)
}
if link.GetThumbnailPayload() != nil {
lp.Thumbnail.Width = int(link.ThumbnailWidth)
lp.Thumbnail.Height = int(link.ThumbnailHeight)
lp.Thumbnail.URL = mediaURL
}
faviconMediaURL := ""
if len(link.FaviconPayload) > 0 {
faviconMediaURL = makeFaviconMediaServerURL(m.ID, link.Url)
}
if link.GetFaviconPayload() != nil {
lp.Favicon.URL = faviconMediaURL
}
previews = append(previews, lp)
}

19
protocol/common/message_test.go
View File

@ -146,6 +146,9 @@ func TestConvertLinkPreviewsToProto(t *testing.T) {
URL: "http://localhost:9999",
DataURI: "data:image/png;base64,iVBORw0KGgoAAAANSUg=",
},
Favicon: LinkPreviewThumbnail{
DataURI: "data:image/png;base64,iVBORw0KGgoAAAANSUg=",
},
},
},
}
@ -166,6 +169,10 @@ func TestConvertLinkPreviewsToProto(t *testing.T) {
require.NoError(t, err)
require.Equal(t, expectedPayload, l.ThumbnailPayload)
expectedFaviconPayload, err := base64.StdEncoding.DecodeString("iVBORw0KGgoAAAANSUg=")
require.NoError(t, err)
require.Equal(t, expectedFaviconPayload, l.FaviconPayload)
// Test any invalid link preview causes an early return.
invalidPreview := validPreview
invalidPreview.Title = ""
@ -178,7 +185,7 @@ func TestConvertLinkPreviewsToProto(t *testing.T) {
invalidPreview.Thumbnail.DataURI = "data:hello/png,iVBOR"
msg.LinkPreviews = []LinkPreview{invalidPreview}
_, err = msg.ConvertLinkPreviewsToProto()
require.ErrorContains(t, err, "could not get data URI payload, url='https://github.com': wrong uri format")
require.ErrorContains(t, err, "could not get data URI payload for link preview thumbnail, url='https://github.com': wrong uri format")
// Test thumbnail is optional.
somePreview := validPreview
@ -196,6 +203,8 @@ func TestConvertFromProtoToLinkPreviews(t *testing.T) {
thumbnailPayload, err := base64.StdEncoding.DecodeString("iVBORw0KGgoAAAANSUg=")
require.NoError(t, err)
FaviconPayload, err := base64.StdEncoding.DecodeString("iVBORw0KGgoAAAANSUg=")
require.NoError(t, err)
l := &protobuf.UnfurledLink{
Description: "GitHub is where people build software.",
@ -203,6 +212,7 @@ func TestConvertFromProtoToLinkPreviews(t *testing.T) {
Type: protobuf.UnfurledLink_LINK,
Url: "https://github.com",
ThumbnailPayload: thumbnailPayload,
FaviconPayload: FaviconPayload,
ThumbnailWidth: 100,
ThumbnailHeight: 200,
}
@ -217,7 +227,7 @@ func TestConvertFromProtoToLinkPreviews(t *testing.T) {
return "https://localhost:6666/" + msgID + "-" + linkURL
}
previews := msg.ConvertFromProtoToLinkPreviews(urlMaker)
previews := msg.ConvertFromProtoToLinkPreviews(urlMaker, urlMaker)
require.Len(t, previews, 1)
p := previews[0]
require.Equal(t, l.Type, p.Type)
@ -230,11 +240,12 @@ func TestConvertFromProtoToLinkPreviews(t *testing.T) {
// fetched from the media server.
require.Equal(t, "", p.Thumbnail.DataURI)
require.Equal(t, "https://localhost:6666/42-https://github.com", p.Thumbnail.URL)
require.Equal(t, "https://localhost:6666/42-https://github.com", p.Favicon.URL)
// Test when the URL is not parseable by url.Parse.
l.Url = "postgres://user:abc{DEf1=ghi@example.com:5432/db?sslmode=require"
msg.ChatMessage.UnfurledLinks = []*protobuf.UnfurledLink{l}
previews = msg.ConvertFromProtoToLinkPreviews(urlMaker)
previews = msg.ConvertFromProtoToLinkPreviews(urlMaker, urlMaker)
require.Len(t, previews, 1)
p = previews[0]
require.Equal(t, l.Url, p.Hostname)
@ -246,7 +257,7 @@ func TestConvertFromProtoToLinkPreviews(t *testing.T) {
Url: "https://github.com",
}
msg.ChatMessage.UnfurledLinks = []*protobuf.UnfurledLink{l}
previews = msg.ConvertFromProtoToLinkPreviews(urlMaker)
previews = msg.ConvertFromProtoToLinkPreviews(urlMaker, urlMaker)
require.Len(t, previews, 1)
p = previews[0]
require.Equal(t, 0, p.Thumbnail.Height)

65
protocol/linkpreview_unfurler_opengraph.go
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@ -6,9 +6,11 @@ import (
"io/ioutil"
"net/http"
neturl "net/url"
"strings"
"github.com/keighl/metabolize"
"go.uber.org/zap"
"golang.org/x/net/html"
"github.com/status-im/status-go/images"
"github.com/status-im/status-go/protocol/common"
@ -38,6 +40,43 @@ func NewOpenGraphUnfurler(URL *neturl.URL, logger *zap.Logger, httpClient *http.
}
}
func GetFavicon(bodyBytes []byte) string {
htmlTokens := html.NewTokenizer(bytes.NewBuffer(bodyBytes))
loop:
for {
tt := htmlTokens.Next()
switch tt {
case html.ErrorToken:
break loop
case html.StartTagToken:
t := htmlTokens.Token()
if t.Data != "link" {
continue
}
isIcon := false
href := ""
for _, attr := range t.Attr {
k := attr.Key
v := attr.Val
if k == "rel" && (v == "icon" || v == "shortcut icon") {
isIcon = true
} else if k == "href" &&
(strings.Contains(v, ".ico") ||
strings.Contains(v, ".png") ||
strings.Contains(v, ".svg")) {
href = v
}
}
if isIcon && href != "" {
return href
}
}
}
return ""
}
func (u *OpenGraphUnfurler) Unfurl() (*common.LinkPreview, error) {
preview := newDefaultLinkPreview(u.url)
preview.Type = protobuf.UnfurledLink_LINK
@ -58,6 +97,13 @@ func (u *OpenGraphUnfurler) Unfurl() (*common.LinkPreview, error) {
return preview, fmt.Errorf("failed to parse OpenGraph data")
}
faviconPath := GetFavicon(bodyBytes)
t, err := fetchImage(u.logger, u.httpClient, faviconPath, false)
if err != nil {
u.logger.Info("failed to fetch favicon", zap.String("url", u.url.String()), zap.Error(err))
} else {
preview.Favicon.DataURI = t.DataURI
}
// There are URLs like https://wikipedia.org/ that don't have an OpenGraph
// title tag, but article pages do. In the future, we can fallback to the
// website's title by using the <title> tag.
@ -66,7 +112,7 @@ func (u *OpenGraphUnfurler) Unfurl() (*common.LinkPreview, error) {
}
if ogMetadata.ThumbnailURL != "" {
t, err := fetchThumbnail(u.logger, u.httpClient, ogMetadata.ThumbnailURL)
t, err := fetchImage(u.logger, u.httpClient, ogMetadata.ThumbnailURL, true)
if err != nil {
// Given we want to fetch thumbnails on a best-effort basis, if an error
// happens we simply log it.
@ -78,24 +124,25 @@ func (u *OpenGraphUnfurler) Unfurl() (*common.LinkPreview, error) {
preview.Title = ogMetadata.Title
preview.Description = ogMetadata.Description
return preview, nil
}
func fetchThumbnail(logger *zap.Logger, httpClient *http.Client, url string) (common.LinkPreviewThumbnail, error) {
func fetchImage(logger *zap.Logger, httpClient *http.Client, url string, getDimensions bool) (common.LinkPreviewThumbnail, error) {
var thumbnail common.LinkPreviewThumbnail
imgBytes, err := fetchBody(logger, httpClient, url, nil)
if err != nil {
return thumbnail, fmt.Errorf("could not fetch thumbnail url='%s': %w", url, err)
}
width, height, err := images.GetImageDimensions(imgBytes)
if err != nil {
return thumbnail, fmt.Errorf("could not get image dimensions url='%s': %w", url, err)
if getDimensions {
width, height, err := images.GetImageDimensions(imgBytes)
if err != nil {
return thumbnail, fmt.Errorf("could not get image dimensions url='%s': %w", url, err)
}
thumbnail.Width = width
thumbnail.Height = height
}
thumbnail.Width = width
thumbnail.Height = height
dataURI, err := images.GetPayloadDataURI(imgBytes)
if err != nil {
return thumbnail, fmt.Errorf("could not build data URI url='%s': %w", url, err)

3
protocol/messenger.go
View File

@ -4342,8 +4342,7 @@ func (m *Messenger) prepareMessage(msg *common.Message, s *server.MediaServer) e
if msg.ContentType == protobuf.ChatMessage_STICKER {
msg.StickerLocalURL = s.MakeStickerURL(msg.GetSticker().Hash)
}
msg.LinkPreviews = msg.ConvertFromProtoToLinkPreviews(s.MakeLinkPreviewThumbnailURL)
msg.LinkPreviews = msg.ConvertFromProtoToLinkPreviews(s.MakeLinkPreviewThumbnailURL, s.MakeLinkPreviewFaviconURL)
msg.StatusLinkPreviews = msg.ConvertFromProtoToStatusLinkPreviews(s.MakeStatusLinkPreviewThumbnailURL)
return nil

63
protocol/messenger_linkpreview_test.go
View File

@ -198,6 +198,63 @@ func (s *MessengerLinkPreviewsTestSuite) readAsset(filename string) []byte {
return b
}
func (s *MessengerLinkPreviewsTestSuite) Test_GetFavicon() {
goodHTMLPNG := []byte(
`
<html>
<head>
<link rel="shortcut icon" href="https://www.somehost.com/favicon.png">
</head>
</html>`)
goodHTMLSVG := []byte(
`
<html>
<head>
<link rel="shortcut icon" href="https://www.somehost.com/favicon.svg">
</head>
</html>`)
goodHTMLICO := []byte(
`
<html>
<head>
<link rel="shortcut icon" href="https://www.somehost.com/favicon.ico">
</head>
</html>`)
badHTMLNoRelAttr := []byte(
`
<html>
<head>
<link href="https://www.somehost.com/favicon.png">
</head>
</html>`)
GoodHTMLRelAttributeIcon := []byte(
`
<html>
<head>
<link rel="icon" href="https://www.somehost.com/favicon.png">
</head>
</html>`)
faviconPath := GetFavicon(goodHTMLPNG)
s.Require().Equal("https://www.somehost.com/favicon.png", faviconPath)
faviconPath = GetFavicon(goodHTMLSVG)
s.Require().Equal("https://www.somehost.com/favicon.svg", faviconPath)
faviconPath = GetFavicon(goodHTMLICO)
s.Require().Equal("https://www.somehost.com/favicon.ico", faviconPath)
faviconPath = GetFavicon(GoodHTMLRelAttributeIcon)
s.Require().Equal("https://www.somehost.com/favicon.png", faviconPath)
faviconPath = GetFavicon(badHTMLNoRelAttr)
s.Require().Equal("", faviconPath)
}
func (s *MessengerLinkPreviewsTestSuite) Test_UnfurlURLs_YouTube() {
u := "https://www.youtube.com/watch?v=lE4UXdJSJM4"
thumbnailURL := "https://i.ytimg.com/vi/lE4UXdJSJM4/maxresdefault.jpg"
@ -213,7 +270,7 @@ func (s *MessengerLinkPreviewsTestSuite) Test_UnfurlURLs_YouTube() {
DataURI: "data:image/webp;base64,UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAQAaJaQAA3AA/vpMgAA",
},
}
favicon := "https://www.youtube.com/s/desktop/87423d78/img/favicon.ico"
transport := StubTransport{}
transport.AddURLMatcher(
u,
@ -223,9 +280,10 @@ func (s *MessengerLinkPreviewsTestSuite) Test_UnfurlURLs_YouTube() {
<meta property="og:title" content="%s">
<meta property="og:description" content="%s">
<meta property="og:image" content="%s">
<link rel="shortcut icon" href="%s">
</head>
</html>
`, expected.Title, expected.Description, thumbnailURL)),
`, expected.Title, expected.Description, thumbnailURL, favicon)),
nil,
)
transport.AddURLMatcher(thumbnailURL, s.readAsset("1.jpg"), nil)
@ -245,6 +303,7 @@ func (s *MessengerLinkPreviewsTestSuite) Test_UnfurlURLs_YouTube() {
s.Require().Equal(expected.Thumbnail.Width, preview.Thumbnail.Width)
s.Require().Equal(expected.Thumbnail.Height, preview.Thumbnail.Height)
s.Require().Equal(expected.Thumbnail.URL, preview.Thumbnail.URL)
s.Require().NotNil(preview.Favicon)
s.assertContainsLongString(expected.Thumbnail.DataURI, preview.Thumbnail.DataURI, 100)
}

3
protocol/messenger_test.go
View File

@ -2291,6 +2291,9 @@ func (s *MessengerSuite) TestSendMessageWithPreviews() {
Width: 100,
Height: 200,
},
Favicon: common.LinkPreviewThumbnail{
DataURI: "data:image/png;base64,iVBORw0KGgoAAAANSUg=",
},
}
inputMsg.LinkPreviews = []common.LinkPreview{preview}

335
protocol/protobuf/chat_message.pb.go
View File

@ -1225,6 +1225,7 @@ type UnfurledLink struct {
ThumbnailWidth uint32 `protobuf:"varint,5,opt,name=thumbnail_width,json=thumbnailWidth,proto3" json:"thumbnail_width,omitempty"`
ThumbnailHeight uint32 `protobuf:"varint,6,opt,name=thumbnail_height,json=thumbnailHeight,proto3" json:"thumbnail_height,omitempty"`
Type UnfurledLink_LinkType `protobuf:"varint,7,opt,name=type,proto3,enum=protobuf.UnfurledLink_LinkType" json:"type,omitempty"`
FaviconPayload []byte `protobuf:"bytes,8,opt,name=favicon_payload,json=faviconPayload,proto3" json:"favicon_payload,omitempty"`
}
func (x *UnfurledLink) Reset() {
@ -1308,6 +1309,13 @@ func (x *UnfurledLink) GetType() UnfurledLink_LinkType {
return UnfurledLink_LINK
}
func (x *UnfurledLink) GetFaviconPayload() []byte {
if x != nil {
return x.FaviconPayload
}
return nil
}
type UnfurledStatusContactLink struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@ -2137,7 +2145,7 @@ var file_chat_message_proto_rawDesc = []byte{
0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x07, 0x70, 0x61, 0x79, 0x6c, 0x6f, 0x61, 0x64, 0x12,
0x14, 0x0a, 0x05, 0x77, 0x69, 0x64, 0x74, 0x68, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x05,
0x77, 0x69, 0x64, 0x74, 0x68, 0x12, 0x16, 0x0a, 0x06, 0x68, 0x65, 0x69, 0x67, 0x68, 0x74, 0x18,
0x03, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x06, 0x68, 0x65, 0x69, 0x67, 0x68, 0x74, 0x22, 0xaf, 0x02,
0x03, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x06, 0x68, 0x65, 0x69, 0x67, 0x68, 0x74, 0x22, 0xd8, 0x02,
0x0a, 0x0c, 0x55, 0x6e, 0x66, 0x75, 0x72, 0x6c, 0x65, 0x64, 0x4c, 0x69, 0x6e, 0x6b, 0x12, 0x10,
0x0a, 0x03, 0x75, 0x72, 0x6c, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x75, 0x72, 0x6c,
0x12, 0x14, 0x0a, 0x05, 0x74, 0x69, 0x74, 0x6c, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52,
@ -2154,170 +2162,173 @@ var file_chat_message_proto_rawDesc = []byte{
0x61, 0x69, 0x6c, 0x48, 0x65, 0x69, 0x67, 0x68, 0x74, 0x12, 0x33, 0x0a, 0x04, 0x74, 0x79, 0x70,
0x65, 0x18, 0x07, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x1f, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62,
0x75, 0x66, 0x2e, 0x55, 0x6e, 0x66, 0x75, 0x72, 0x6c, 0x65, 0x64, 0x4c, 0x69, 0x6e, 0x6b, 0x2e,
0x4c, 0x69, 0x6e, 0x6b, 0x54, 0x79, 0x70, 0x65, 0x52, 0x04, 0x74, 0x79, 0x70, 0x65, 0x22, 0x1f,
0x0a, 0x08, 0x4c, 0x69, 0x6e, 0x6b, 0x54, 0x79, 0x70, 0x65, 0x12, 0x08, 0x0a, 0x04, 0x4c, 0x49,
0x4e, 0x4b, 0x10, 0x00, 0x12, 0x09, 0x0a, 0x05, 0x49, 0x4d, 0x41, 0x47, 0x45, 0x10, 0x01, 0x22,
0xb4, 0x01, 0x0a, 0x19, 0x55, 0x6e, 0x66, 0x75, 0x72, 0x6c, 0x65, 0x64, 0x53, 0x74, 0x61, 0x74,
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}
var (

1
protocol/protobuf/chat_message.proto
View File

@ -137,6 +137,7 @@ message UnfurledLink {
uint32 thumbnail_width = 5;
uint32 thumbnail_height = 6;
LinkType type = 7;
bytes favicon_payload = 8;
enum LinkType {
LINK = 0;

1
server/handlers.go
View File

@ -34,6 +34,7 @@ const (
discordAuthorsPath = "/discord/authors"
discordAttachmentsPath = basePath + "/discord/attachments"
LinkPreviewThumbnailPath = "/link-preview/thumbnail"
LinkPreviewFaviconPath = "/link-preview/favicon"
StatusLinkPreviewThumbnailPath = "/status-link-preview/thumbnail"
communityTokenImagesPath = "/communityTokenImages"

120
server/handlers_linkpreview.go
View File

@ -14,19 +14,27 @@ import (
"github.com/status-im/status-go/protocol/protobuf"
)
func getThumbnailPayload(db *sql.DB, logger *zap.Logger, msgID string, thumbnailURL string) ([]byte, error) {
var payload []byte
func getUnfurledLinksFromDB(db *sql.DB, msgID string) ([]*protobuf.UnfurledLink, error) {
var result []byte
err := db.QueryRow(`SELECT unfurled_links FROM user_messages WHERE id = ?`, msgID).Scan(&result)
if err != nil {
return payload, fmt.Errorf("could not find message with message-id '%s': %w", msgID, err)
return nil, fmt.Errorf("could not find message with message-id '%s': %w", msgID, err)
}
var links []*protobuf.UnfurledLink
err = json.Unmarshal(result, &links)
if err != nil {
return payload, fmt.Errorf("failed to unmarshal protobuf.UrlPreview: %w", err)
return nil, fmt.Errorf("failed to unmarshal protobuf.UrlPreview: %w", err)
}
return links, nil
}
func getThumbnailPayload(db *sql.DB, msgID string, thumbnailURL string) ([]byte, error) {
var payload []byte
var links, err = getUnfurledLinksFromDB(db, msgID)
if err != nil {
return nil, err
}
for _, p := range links {
@ -39,40 +47,82 @@ func getThumbnailPayload(db *sql.DB, logger *zap.Logger, msgID string, thumbnail
return payload, nil
}
func getFaviconPayload(db *sql.DB, msgID string, faviconURL string) ([]byte, error) {
var payload []byte
var links, err = getUnfurledLinksFromDB(db, msgID)
if err != nil {
return nil, err
}
for _, p := range links {
if p.Url == faviconURL {
payload = p.FaviconPayload
break
}
}
return payload, nil
}
func validateAndReturnImageParams(r *http.Request, w http.ResponseWriter, logger *zap.Logger) ImageParams {
params := r.URL.Query()
parsed := ParseImageParams(logger, params)
if parsed.MessageID == "" {
http.Error(w, "missing query parameter 'message-id'", http.StatusBadRequest)
return ImageParams{}
}
if parsed.URL == "" {
http.Error(w, "missing query parameter 'url'", http.StatusBadRequest)
return ImageParams{}
}
return parsed
}
func getMimeTypeAndWriteImage(w http.ResponseWriter, logger *zap.Logger, imagePayload []byte) {
mimeType, err := images.GetMimeType(imagePayload)
if err != nil {
http.Error(w, "mime type not supported", http.StatusNotImplemented)
return
}
w.Header().Set("Content-Type", "image/"+mimeType)
w.Header().Set("Cache-Control", "no-store")
_, err = w.Write(imagePayload)
if err != nil {
logger.Error("failed to write response", zap.Error(err))
}
}
func checkForFetchImageError(err error, logger *zap.Logger, parsedImageParams ImageParams, w http.ResponseWriter, imageType string) {
if err != nil {
logger.Error("failed to get "+imageType, zap.String("msgID", parsedImageParams.MessageID))
http.Error(w, "failed to get "+imageType, http.StatusInternalServerError)
return
}
}
func handleLinkPreviewThumbnail(db *sql.DB, logger *zap.Logger) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
params := r.URL.Query()
parsed := ParseImageParams(logger, params)
if parsed.MessageID == "" {
http.Error(w, "missing query parameter 'message-id'", http.StatusBadRequest)
return
parsed := validateAndReturnImageParams(r, w, logger)
if parsed.URL != "" {
thumbnail, err := getThumbnailPayload(db, parsed.MessageID, parsed.URL)
checkForFetchImageError(err, logger, parsed, w, "thumbnail")
getMimeTypeAndWriteImage(w, logger, thumbnail)
}
}
}
if parsed.URL == "" {
http.Error(w, "missing query parameter 'url'", http.StatusBadRequest)
return
}
thumbnail, err := getThumbnailPayload(db, logger, parsed.MessageID, parsed.URL)
if err != nil {
logger.Error("failed to get thumbnail", zap.String("msgID", parsed.MessageID))
http.Error(w, "failed to get thumbnail", http.StatusInternalServerError)
return
}
mimeType, err := images.GetMimeType(thumbnail)
if err != nil {
http.Error(w, "mime type not supported", http.StatusNotImplemented)
return
}
w.Header().Set("Content-Type", "image/"+mimeType)
w.Header().Set("Cache-Control", "no-store")
_, err = w.Write(thumbnail)
if err != nil {
logger.Error("failed to write response", zap.Error(err))
func handleLinkPreviewFavicon(db *sql.DB, logger *zap.Logger) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
parsed := validateAndReturnImageParams(r, w, logger)
if parsed.URL != "" {
favicon, err := getFaviconPayload(db, parsed.MessageID, parsed.URL)
checkForFetchImageError(err, logger, parsed, w, "favicon")
getMimeTypeAndWriteImage(w, logger, favicon)
}
}
}

8
server/server_media.go
View File

@ -52,6 +52,7 @@ func NewMediaServer(db *sql.DB, downloader *ipfs.Downloader, multiaccountsDB *mu
imagesPath: handleImage(s.db, s.logger),
ipfsPath: handleIPFS(s.downloader, s.logger),
LinkPreviewThumbnailPath: handleLinkPreviewThumbnail(s.db, s.logger),
LinkPreviewFaviconPath: handleLinkPreviewFavicon(s.db, s.logger),
StatusLinkPreviewThumbnailPath: handleStatusLinkPreviewThumbnail(s.db, s.logger),
communityTokenImagesPath: handleCommunityTokenImages(s.db, s.logger),
walletCommunityImagesPath: handleWalletCommunityImages(s.walletDB, s.logger),
@ -90,6 +91,13 @@ func (s *MediaServer) MakeStatusLinkPreviewThumbnailURL(msgID string, previewURL
return u.String()
}
func (s *MediaServer) MakeLinkPreviewFaviconURL(msgID string, previewURL string) string {
u := s.MakeBaseURL()
u.Path = LinkPreviewFaviconPath
u.RawQuery = url.Values{"message-id": {msgID}, "url": {previewURL}}.Encode()
return u.String()
}
func (s *MediaServer) MakeDiscordAuthorAvatarURL(authorID string) string {
u := s.MakeBaseURL()
u.Path = discordAuthorsPath