change to index handling and initial markdown support

src/routes/artifact.go

@@ -15,6 +15,10 @@ import (
 	"github.com/gorilla/mux"
 	"sour.is/x/toolbox/httpsrv"
 	"sour.is/x/toolbox/log"
+
+	"github.com/gomarkdown/markdown"
+	"github.com/gomarkdown/markdown/html"
+	"github.com/gomarkdown/markdown/parser"
 )
 
 func init() {
@@ -78,7 +82,7 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 
 	f, err := os.Open(fname)
 	if err != nil {
-		log.Fatal(err)
+		log.Error(err)
 	}
 	defer f.Close()
 
@@ -107,7 +111,7 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 	}
 
 	tr := tar.NewReader(rdr)
-	if path == "..." {
+	if path == "@" {
 		var paths []string
 		for {
 			hdr, err := tr.Next()
@@ -115,7 +119,7 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 				break // End of archive
 			}
 			if err != nil {
-				log.Fatal(err)
+				log.Error(err)
 			}
 			paths = append(paths, hdr.Name)
 		}
@@ -130,9 +134,37 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 			break // End of archive
 		}
 		if err != nil {
-			log.Fatal(err)
+			log.Error(err)
 		}
+		if path == "~" && hdr.Name == "index.html" {
+			path = hdr.Name
+		}
+		if path == "~" && hdr.Name == "index.md" {
+			path = hdr.Name
+		}
+
 		if hdr.Name == path {
+			if strings.HasSuffix(hdr.Name, ".md") {
+				md, err := ioutil.ReadAll(tr)
+				if err != nil {
+					httpsrv.WriteError(w, http.StatusInternalServerError, err.Error())
+					return
+				}
+
+				w.Header().Set("Content-Type", "text/html")
+				extensions := parser.CommonExtensions | parser.AutoHeadingIDs
+				p := parser.NewWithExtensions(extensions)
+
+				htmlFlags := html.CommonFlags | html.HrefTargetBlank
+				opts := html.RendererOptions{Flags: htmlFlags}
+				renderer := html.NewRenderer(opts)
+
+				b := markdown.ToHTML(md, p, renderer)
+				w.Write(b)
+				w.WriteHeader(http.StatusOK)
+				return
+			}
+
 			pr := NewPreviewReader(tr)
 
 			mime, err := ReadMIME(pr, hdr.Name)
@@ -143,7 +175,7 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 			w.Header().Set("Content-Type", mime)
 
 			if _, err := io.Copy(w, pr.Drain()); err != nil {
-				log.Fatal(err)
+				log.Error(err)
 			}
 			w.WriteHeader(http.StatusOK)
 			return