Monorepo for Tangled
appview: pages/markup: rewrite links links to camo url
authored by
Anirudh Oppiliappan
and committed by
Tangled
(May 3, 2025, 1:32 PM UTC)
7edbc446
5984e986
+57
-16
+2
appview/config.go
+2
appview/config.go
···
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Dev bool `env:"TANGLED_DEV, default=false"`
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JetstreamEndpoint string `env:"TANGLED_JETSTREAM_ENDPOINT, default=wss://jetstream1.us-east.bsky.network/subscribe"`
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ResendApiKey string `env:"TANGLED_RESEND_API_KEY"`
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CamoHost string `env:"TANGLED_CAMO_HOST, default=https://camo.tangled.sh"`
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CamoSharedSecret string `env:"TANGLED_CAMO_SHARED_SECRET"`
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}
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func LoadConfig(ctx context.Context) (*Config, error) {
+1
-1
appview/pages/funcmap.go
+1
-1
appview/pages/funcmap.go
···
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return v.Slice(start, end).Interface()
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},
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"markdown": func(text string) template.HTML {
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-
rctx := &markup.RenderContext{}
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rctx := &markup.RenderContext{RendererType: markup.RendererTypeDefault}
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return template.HTML(rctx.RenderMarkdown(text))
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},
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"isNil": func(t any) bool {
+31
appview/pages/markup/camo.go
+31
appview/pages/markup/camo.go
···
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package markup
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+
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import (
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"crypto/hmac"
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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+
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"github.com/yuin/goldmark/ast"
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)
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func generateCamoURL(baseURL, secret, imageURL string) string {
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h := hmac.New(sha256.New, []byte(secret))
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h.Write([]byte(imageURL))
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signature := hex.EncodeToString(h.Sum(nil))
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hexURL := hex.EncodeToString([]byte(imageURL))
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return fmt.Sprintf("%s/%s/%s", baseURL, signature, hexURL)
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}
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func (rctx *RenderContext) camoImageLinkTransformer(img *ast.Image) {
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// don't camo on dev
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if rctx.IsDev {
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return
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}
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+
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dst := string(img.Destination)
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+
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if rctx.CamoUrl != "" && rctx.CamoSecret != "" {
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img.Destination = []byte(generateCamoURL(rctx.CamoUrl, rctx.CamoSecret, dst))
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}
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}
+12
-1
appview/pages/markup/markdown.go
+12
-1
appview/pages/markup/markdown.go
···
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const (
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// RendererTypeRepoMarkdown is for repository documentation markdown files
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RendererTypeRepoMarkdown RendererType = iota
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// RendererTypeDefault is non-repo markdown, like issues/pulls/comments.
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RendererTypeDefault
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)
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// RenderContext holds the contextual data for rendering markdown.
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// It can be initialized empty, and that'll skip any transformations.
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type RenderContext struct {
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CamoUrl string
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CamoSecret string
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repoinfo.RepoInfo
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IsDev bool
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RendererType RendererType
···
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a.rctx.relativeLinkTransformer(n.(*ast.Link))
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case *ast.Image:
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a.rctx.imageFromKnotTransformer(n.(*ast.Image))
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a.rctx.camoImageLinkTransformer(n.(*ast.Image))
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}
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// more types here like RendererTypeIssue/Pull etc.
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case RendererTypeDefault:
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switch n.(type) {
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case *ast.Image:
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a.rctx.imageFromKnotTransformer(n.(*ast.Image))
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a.rctx.camoImageLinkTransformer(n.(*ast.Image))
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}
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}
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return ast.WalkContinue, nil
+10
-13
appview/pages/pages.go
+10
-13
appview/pages/pages.go
···
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"path/filepath"
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"strings"
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"tangled.sh/tangled.sh/core/appview"
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"tangled.sh/tangled.sh/core/appview/auth"
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"tangled.sh/tangled.sh/core/appview/db"
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"tangled.sh/tangled.sh/core/appview/pages/markup"
···
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rctx *markup.RenderContext
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}
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-
func NewPages(dev bool) *Pages {
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func NewPages(config *appview.Config) *Pages {
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// initialized with safe defaults, can be overriden per use
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rctx := &markup.RenderContext{
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IsDev: dev,
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IsDev: config.Dev,
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CamoUrl: config.CamoHost,
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CamoSecret: config.CamoSharedSecret,
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}
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p := &Pages{
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t: make(map[string]*template.Template),
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dev: dev,
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dev: config.Dev,
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embedFS: Files,
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rctx: rctx,
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templateDir: "appview/pages",
···
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return p.executeRepo("repo/empty", w, params)
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}
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p.rctx = &markup.RenderContext{
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RepoInfo: params.RepoInfo,
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IsDev: p.dev,
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RendererType: markup.RendererTypeRepoMarkdown,
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}
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p.rctx.RepoInfo = params.RepoInfo
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p.rctx.RendererType = markup.RendererTypeRepoMarkdown
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if params.ReadmeFileName != "" {
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var htmlString string
···
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if params.ShowRendered {
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switch markup.GetFormat(params.Path) {
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case markup.FormatMarkdown:
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p.rctx = &markup.RenderContext{
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RepoInfo: params.RepoInfo,
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IsDev: p.dev,
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RendererType: markup.RendererTypeRepoMarkdown,
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}
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p.rctx.RepoInfo = params.RepoInfo
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p.rctx.RendererType = markup.RendererTypeRepoMarkdown
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params.RenderedContents = template.HTML(p.rctx.RenderMarkdown(params.Contents))
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}
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}