Add opensearch endpoint and handler

internal/opensearch_handler.go

@@ -0,0 +1,35 @@
+package internal
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/julienschmidt/httprouter"
+)
+
+const OpenSearchTemplate string = `<?xml version="1.0" encoding="UTF-8"?>
+<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
+  <ShortName>%s</ShortName>
+  <Description>%s</Description>
+  <Tags>search</Tags>
+  <Contact>%s</Contact>
+  <Url type="text/html" method="get" template="%s?q={searchTerms}"/>
+</OpenSearchDescription>
+`
+
+// OpenSearchHandler ...
+func (s *Server) OpenSearchHandler() httprouter.Handle {
+	return func(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
+		w.Header().Set("Content-Type", "text/xml")
+
+		w.Write(
+			[]byte(fmt.Sprintf(
+				OpenSearchTemplate,
+				s.config.Name,
+				s.config.Description,
+				s.config.AdminEmail,
+				s.config.BaseURL,
+			)),
+		)
+	}
+}

internal/server.go

@@ -285,6 +285,8 @@ func (s *Server) initRoutes() {
 	s.router.GET("/", s.IndexHandler())
 	s.router.HEAD("/", s.IndexHandler())
 
+	s.router.GET("/opensearch.xml", s.OpenSearchHandler())
+
 	s.router.GET("/robots.txt", s.RobotsHandler())
 	s.router.HEAD("/robots.txt", s.RobotsHandler())
 

internal/templates/base.html

@@ -13,6 +13,8 @@
       <link rel="icon" type="image/png" href="/img/{{ .Commit}}/favicon.png" />
     {{ end }}
 
+    <link rel="search" type="application/opensearchdescription+xml" href="/opensearch.xml" title="Spyda Search">
+
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />