Merge pull request #474 from apachelogger/support-graph.dot

Allow requesting the unrendered dot graph from the graph endpoint

AUTHORS

@@ -22,3 +22,4 @@ List of contributors, in chronological order:
 * Phil Frost (https://github.com/bitglue)
 * Benoit Foucher (https://github.com/bentoi)
 * Geoffrey Thomas (https://github.com/geofft)
+* Harald Sitter (https://github.com/apachelogger)

api/graph.go

@@ -39,6 +39,13 @@ func apiGraph(c *gin.Context) {
 
 	buf := bytes.NewBufferString(graph.String())
 
+	if ext == "dot" || ext == "gv" {
+		// If the raw dot data is requested, return it as string.
+		// This allows client-side rendering rather than server-side.
+		c.String(200, buf.String())
+		return
+	}
+
 	command := exec.Command("dot", "-T"+ext)
 	command.Stderr = os.Stderr
 

system/t12_api/graph.py

@@ -15,3 +15,7 @@ class GraphAPITest(APITest):
         resp = self.get("/api/graph.svg")
         self.check_equal(resp.headers["Content-Type"], "image/svg+xml")
         self.check_equal(resp.content[:4], '<?xm')
+
+        resp = self.get("/api/graph.dot")
+        self.check_equal(resp.headers["Content-Type"], "text/plain; charset=utf-8")
+        self.check_equal(resp.content[:13], 'digraph aptly')