implement open graph metadata for apiV4 (#6343)

2017-05-10 12:44:18 +02:00
--- a/api4/openGraph_test.go
+++ b/api4/openGraph_test.go
@@ -0,0 +1,73 @@
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package api4
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+
+	"testing"
+
+	"github.com/mattermost/platform/utils"
+)
+
+func TestGetOpenGraphMetadata(t *testing.T) {
+	th := Setup().InitBasic()
+	Client := th.Client
+
+	enableLinkPreviews := *utils.Cfg.ServiceSettings.EnableLinkPreviews
+	defer func() {
+		*utils.Cfg.ServiceSettings.EnableLinkPreviews = enableLinkPreviews
+	}()
+	*utils.Cfg.ServiceSettings.EnableLinkPreviews = true
+
+	ogDataCacheMissCount := 0
+
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		ogDataCacheMissCount++
+
+		if r.URL.Path == "/og-data/" {
+			fmt.Fprintln(w, `
+        <html><head><meta property="og:type" content="article" />
+          <meta property="og:title" content="Test Title" />
+          <meta property="og:url" content="http://example.com/" />
+        </head><body></body></html>
+      `)
+		} else if r.URL.Path == "/no-og-data/" {
+			fmt.Fprintln(w, `<html><head></head><body></body></html>`)
+		}
+	}))
+
+	for _, data := range [](map[string]interface{}){
+		{"path": "/og-data/", "title": "Test Title", "cacheMissCount": 1},
+		{"path": "/no-og-data/", "title": "", "cacheMissCount": 2},
+
+		// Data should be cached for following
+		{"path": "/og-data/", "title": "Test Title", "cacheMissCount": 2},
+		{"path": "/no-og-data/", "title": "", "cacheMissCount": 2},
+	} {
+
+		openGraph, resp := Client.OpenGraph(ts.URL + data["path"].(string))
+		CheckNoError(t, resp)
+		if strings.Compare(openGraph["title"], data["title"].(string)) != 0 {
+			t.Fatal(fmt.Sprintf(
+				"OG data title mismatch for path \"%s\". Expected title: \"%s\". Actual title: \"%s\"",
+				data["path"].(string), data["title"].(string), openGraph["title"],
+			))
+		}
+
+		if ogDataCacheMissCount != data["cacheMissCount"].(int) {
+			t.Fatal(fmt.Sprintf(
+				"Cache miss count didn't match. Expected value %d. Actual value %d.",
+				data["cacheMissCount"].(int), ogDataCacheMissCount,
+			))
+		}
+	}
+
+	*utils.Cfg.ServiceSettings.EnableLinkPreviews = false
+	_, resp := Client.OpenGraph(ts.URL + "/og-data/")
+	CheckNotImplementedStatus(t, resp)
+}