From f957ef5d78c8d430ade767a6e972577efbd73434 Mon Sep 17 00:00:00 2001
From: Derrick Hammer <derrick@derrickhammer.com>
Date: Wed, 17 Jan 2024 22:16:04 -0500
Subject: [PATCH] feat: implement /s5/metadata/:cid

---
 api/s5.go      |  3 ++-
 api/s5/http.go | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/api/s5.go b/api/s5.go
index c494d60..d84f443 100644
--- a/api/s5.go
+++ b/api/s5.go
@@ -42,7 +42,8 @@ func getRoutes(h *s5.HttpHandler, portal interfaces.Portal) map[string]jape.Hand
 		"POST /s5/upload/directory": s5.AuthMiddleware(h.DirectoryUpload, portal),
 
 		// Download API
-		"GET /s5/blob/:cid": s5.AuthMiddleware(h.DownloadBlob, portal),
+		"GET /s5/blob/:cid":     s5.AuthMiddleware(h.DownloadBlob, portal),
+		"GET /s5/metadata/:cid": s5.AuthMiddleware(h.DownloadMetadata, portal),
 
 		// Pins API
 		"POST /s5/pin/:cid":      s5.AuthMiddleware(h.AccountPin, portal),
diff --git a/api/s5/http.go b/api/s5/http.go
index ca520d9..c6a3a61 100644
--- a/api/s5/http.go
+++ b/api/s5/http.go
@@ -1238,6 +1238,44 @@ func (h *HttpHandler) DebugStorageLocations(jc jape.Context) {
 	})
 }
 
+func (h *HttpHandler) DownloadMetadata(jc jape.Context) {
+	var cid string
+
+	if jc.DecodeParam("cid", &cid) != nil {
+		return
+	}
+
+	cidDecoded, err := encoding.CIDFromString(cid)
+	if jc.Check("error decoding cid", err) != nil {
+		return
+	}
+
+	switch cidDecoded.Type {
+	case types.CIDTypeRaw:
+		_ = jc.Error(errors.New("Raw CIDs do not have metadata"), http.StatusBadRequest)
+		return
+
+	case types.CIDTypeResolver:
+		_ = jc.Error(errors.New("Resolver CIDs not yet supported"), http.StatusBadRequest)
+		return
+	}
+
+	meta, err := h.getNode().GetMetadataByCID(cidDecoded)
+
+	if jc.Check("error getting metadata", err) != nil {
+		return
+	}
+
+	if cidDecoded.Type != types.CIDTypeBridge {
+		jc.ResponseWriter.Header().Set("Cache-Control", "public, max-age=31536000")
+	} else {
+		jc.ResponseWriter.Header().Set("Cache-Control", "public, max-age=60")
+	}
+
+	jc.Encode(&meta)
+
+}
+
 func setAuthCookie(jwt string, jc jape.Context) {
 	authCookie := http.Cookie{
 		Name:     "s5-auth-token",