Fix URL handling in the whole markdown module, improve test coverage (#1027)

Amended with string to bool change in API SDK.

Signed-off-by: Andrew Boyarshin <andrew.boyarshin@gmail.com>

models/mail.go

@@ -150,7 +150,7 @@ func composeTplData(subject, body, link string) map[string]interface{} {
 
 func composeIssueMessage(issue *Issue, doer *User, tplName base.TplName, tos []string, info string) *mailer.Message {
 	subject := issue.mailSubject()
-	body := string(markdown.RenderSpecialLink([]byte(issue.Content), issue.Repo.HTMLURL(), issue.Repo.ComposeMetas()))
+	body := string(markdown.RenderString(issue.Content, issue.Repo.HTMLURL(), issue.Repo.ComposeMetas()))
 	data := composeTplData(subject, body, issue.HTMLURL())
 	data["Doer"] = doer
 

modules/markdown/markdown.go

@@ -92,10 +92,10 @@ var (
 	ShortLinkPattern = regexp.MustCompile(`(\[\[.*\]\]\w*)`)
 
 	// AnySHA1Pattern allows to split url containing SHA into parts
-	AnySHA1Pattern = regexp.MustCompile(`http\S+//(\S+)/(\S+)/(\S+)/(\S+)/([0-9a-f]{40})(?:/?([^#\s]+)?(?:#(\S+))?)?`)
+	AnySHA1Pattern = regexp.MustCompile(`(http\S*)://(\S+)/(\S+)/(\S+)/(\S+)/([0-9a-f]{40})(?:/?([^#\s]+)?(?:#(\S+))?)?`)
 
 	// IssueFullPattern allows to split issue (and pull) URLs into parts
-	IssueFullPattern = regexp.MustCompile(`(?:^|\s|\()http\S+//((?:[^\s/]+/)+)((?:\w{1,10}-)?[1-9][0-9]*)([\?|#]\S+.(\S+)?)?\b`)
+	IssueFullPattern = regexp.MustCompile(`(?:^|\s|\()(http\S*)://((?:[^\s/]+/)+)((?:\w{1,10}-)?[1-9][0-9]*)([\?|#]\S+.(\S+)?)?\b`)
 
 	validLinksPattern = regexp.MustCompile(`^[a-z][\w-]+://`)
 )
@@ -126,10 +126,11 @@ type Renderer struct {
 func (r *Renderer) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
 	if len(link) > 0 && !isLink(link) {
 		if link[0] != '#' {
-			mLink := URLJoin(r.urlPrefix, string(link))
+			lnk := string(link)
 			if r.isWikiMarkdown {
-				mLink = URLJoin(r.urlPrefix, "wiki", string(link))
+				lnk = URLJoin("wiki", lnk)
 			}
+			mLink := URLJoin(r.urlPrefix, lnk)
 			link = []byte(mLink)
 		}
 	}
@@ -206,12 +207,10 @@ func (r *Renderer) Image(out *bytes.Buffer, link []byte, title []byte, alt []byt
 				return
 			}
 		} else {
-			if link[0] != '/' {
-				if !strings.HasSuffix(prefix, "/") {
-					prefix += "/"
-				}
-			}
-			link = []byte(url.QueryEscape(prefix + string(link)))
+			lnk := string(link)
+			lnk = URLJoin(prefix, lnk)
+			lnk = strings.Replace(lnk, " ", "+", -1)
+			link = []byte(lnk)
 		}
 	}
 
@@ -246,10 +245,30 @@ func URLJoin(elem ...string) string {
 	last := len(elem) - 1
 	for i, item := range elem {
 		res += item
-		if !strings.HasSuffix(res, "/") && i != last {
+		if i != last && !strings.HasSuffix(res, "/") {
 			res += "/"
 		}
 	}
+	cwdIndex := strings.Index(res, "/./")
+	for cwdIndex != -1 {
+		res = strings.Replace(res, "/./", "/", 1)
+		cwdIndex = strings.Index(res, "/./")
+	}
+	upIndex := strings.Index(res, "/..")
+	for upIndex != -1 {
+		res = strings.Replace(res, "/..", "", 1)
+		prevStart := -1
+		for i := upIndex - 1; i >= 0; i-- {
+			if res[i] == '/' {
+				prevStart = i
+				break
+			}
+		}
+		if prevStart != -1 {
+			res = res[:prevStart] + res[upIndex:]
+		}
+		upIndex = strings.Index(res, "/..")
+	}
 	return res
 }
 
@@ -286,6 +305,9 @@ func RenderIssueIndexPattern(rawBytes []byte, urlPrefix string, metas map[string
 
 // IsSameDomain checks if given url string has the same hostname as current Gitea instance
 func IsSameDomain(s string) bool {
+	if strings.HasPrefix(s, "/") {
+		return true
+	}
 	if uapp, err := url.Parse(setting.AppURL); err == nil {
 		if u, err := url.Parse(s); err == nil {
 			return u.Host == uapp.Host
@@ -300,26 +322,27 @@ func renderFullSha1Pattern(rawBytes []byte, urlPrefix string) []byte {
 	ms := AnySHA1Pattern.FindAllSubmatch(rawBytes, -1)
 	for _, m := range ms {
 		all := m[0]
-		paths := string(m[1])
-		var path = "//" + paths
-		author := string(m[2])
-		repoName := string(m[3])
+		protocol := string(m[1])
+		paths := string(m[2])
+		path := protocol + "://" + paths
+		author := string(m[3])
+		repoName := string(m[4])
 		path = URLJoin(path, author, repoName)
 		ltype := "src"
-		itemType := m[4]
+		itemType := m[5]
 		if IsSameDomain(paths) {
 			ltype = string(itemType)
 		} else if string(itemType) == "commit" {
 			ltype = "commit"
 		}
-		sha := m[5]
+		sha := m[6]
 		var subtree string
-		if len(m) > 6 && len(m[6]) > 0 {
-			subtree = string(m[6])
+		if len(m) > 7 && len(m[7]) > 0 {
+			subtree = string(m[7])
 		}
 		var line []byte
-		if len(m) > 7 && len(m[7]) > 0 {
-			line = m[7]
+		if len(m) > 8 && len(m[8]) > 0 {
+			line = m[8]
 		}
 		urlSuffix := ""
 		text := base.ShortSha(string(sha))
@@ -346,23 +369,18 @@ func renderFullIssuePattern(rawBytes []byte, urlPrefix string) []byte {
 	ms := IssueFullPattern.FindAllSubmatch(rawBytes, -1)
 	for _, m := range ms {
 		all := m[0]
-		paths := bytes.Split(m[1], []byte("/"))
+		protocol := string(m[1])
+		paths := bytes.Split(m[2], []byte("/"))
 		paths = paths[:len(paths)-1]
 		if bytes.HasPrefix(paths[0], []byte("gist.")) {
 			continue
 		}
-		var path string
-		if len(paths) > 3 {
-			// Internal one
-			path = URLJoin(urlPrefix, "issues")
-		} else {
-			path = "//" + string(m[1])
-		}
-		id := string(m[2])
+		path := protocol + "://" + string(m[2])
+		id := string(m[3])
 		path = URLJoin(path, id)
 		var comment []byte
 		if len(m) > 3 {
-			comment = m[3]
+			comment = m[4]
 		}
 		urlSuffix := ""
 		text := "#" + id
@@ -394,8 +412,13 @@ func lastIndexOfByte(sl []byte, target byte) int {
 	return -1
 }
 
-// renderShortLinks processes [[syntax]]
-func renderShortLinks(rawBytes []byte, urlPrefix string, noLink bool) []byte {
+// RenderShortLinks processes [[syntax]]
+//
+// noLink flag disables making link tags when set to true
+// so this function just replaces the whole [[...]] with the content text
+//
+// isWikiMarkdown is a flag to choose linking url prefix
+func RenderShortLinks(rawBytes []byte, urlPrefix string, noLink bool, isWikiMarkdown bool) []byte {
 	ms := ShortLinkPattern.FindAll(rawBytes, -1)
 	for _, m := range ms {
 		orig := bytes.TrimSpace(m)
@@ -482,11 +505,17 @@ func renderShortLinks(rawBytes []byte, urlPrefix string, noLink bool) []byte {
 		}
 		absoluteLink := isLink([]byte(link))
 		if !absoluteLink {
-			link = url.QueryEscape(link)
+			link = strings.Replace(link, " ", "+", -1)
 		}
 		if image {
 			if !absoluteLink {
-				link = URLJoin(urlPrefix, "wiki", "raw", link)
+				if IsSameDomain(urlPrefix) {
+					urlPrefix = strings.Replace(urlPrefix, "/src/", "/raw/", 1)
+				}
+				if isWikiMarkdown {
+					link = URLJoin("wiki", "raw", link)
+				}
+				link = URLJoin(urlPrefix, link)
 			}
 			title := props["title"]
 			if title == "" {
@@ -504,7 +533,10 @@ func renderShortLinks(rawBytes []byte, urlPrefix string, noLink bool) []byte {
 			}
 			name = fmt.Sprintf(`<img src="%s" %s title="%s" />`, link, alt, title)
 		} else if !absoluteLink {
-			link = URLJoin(urlPrefix, "wiki", link)
+			if isWikiMarkdown {
+				link = URLJoin("wiki", link)
+			}
+			link = URLJoin(urlPrefix, link)
 		}
 		if noLink {
 			rawBytes = bytes.Replace(rawBytes, orig, []byte(name), -1)
@@ -527,7 +559,7 @@ func RenderCrossReferenceIssueIndexPattern(rawBytes []byte, urlPrefix string, me
 		repo := string(bytes.Split(m, []byte("#"))[0])
 		issue := string(bytes.Split(m, []byte("#"))[1])
 
-		link := fmt.Sprintf(`<a href="%s">%s</a>`, URLJoin(urlPrefix, repo, "issues", issue), m)
+		link := fmt.Sprintf(`<a href="%s">%s</a>`, URLJoin(setting.AppURL, repo, "issues", issue), m)
 		rawBytes = bytes.Replace(rawBytes, m, []byte(link), 1)
 	}
 	return rawBytes
@@ -548,7 +580,7 @@ func renderSha1CurrentPattern(rawBytes []byte, urlPrefix string) []byte {
 }
 
 // RenderSpecialLink renders mentions, indexes and SHA1 strings to corresponding links.
-func RenderSpecialLink(rawBytes []byte, urlPrefix string, metas map[string]string) []byte {
+func RenderSpecialLink(rawBytes []byte, urlPrefix string, metas map[string]string, isWikiMarkdown bool) []byte {
 	ms := MentionPattern.FindAll(rawBytes, -1)
 	for _, m := range ms {
 		m = m[bytes.Index(m, []byte("@")):]
@@ -556,7 +588,7 @@ func RenderSpecialLink(rawBytes []byte, urlPrefix string, metas map[string]strin
 			[]byte(fmt.Sprintf(`<a href="%s">%s</a>`, URLJoin(setting.AppURL, string(m[1:])), m)), -1)
 	}
 
-	rawBytes = renderShortLinks(rawBytes, urlPrefix, false)
+	rawBytes = RenderShortLinks(rawBytes, urlPrefix, false, isWikiMarkdown)
 	rawBytes = RenderIssueIndexPattern(rawBytes, urlPrefix, metas)
 	rawBytes = RenderCrossReferenceIssueIndexPattern(rawBytes, urlPrefix, metas)
 	rawBytes = renderFullSha1Pattern(rawBytes, urlPrefix)
@@ -601,7 +633,7 @@ var noEndTags = []string{"img", "input", "br", "hr"}
 
 // PostProcess treats different types of HTML differently,
 // and only renders special links for plain text blocks.
-func PostProcess(rawHTML []byte, urlPrefix string, metas map[string]string) []byte {
+func PostProcess(rawHTML []byte, urlPrefix string, metas map[string]string, isWikiMarkdown bool) []byte {
 	startTags := make([]string, 0, 5)
 	var buf bytes.Buffer
 	tokenizer := html.NewTokenizer(bytes.NewReader(rawHTML))
@@ -611,7 +643,7 @@ OUTER_LOOP:
 		token := tokenizer.Token()
 		switch token.Type {
 		case html.TextToken:
-			buf.Write(RenderSpecialLink([]byte(token.String()), urlPrefix, metas))
+			buf.Write(RenderSpecialLink([]byte(token.String()), urlPrefix, metas, isWikiMarkdown))
 
 		case html.StartTagToken:
 			buf.WriteString(token.String())
@@ -623,7 +655,7 @@ OUTER_LOOP:
 					token = tokenizer.Token()
 
 					// Copy the token to the output verbatim
-					buf.Write(renderShortLinks([]byte(token.String()), urlPrefix, true))
+					buf.Write(RenderShortLinks([]byte(token.String()), urlPrefix, true, isWikiMarkdown))
 
 					if token.Type == html.StartTagToken {
 						if !com.IsSliceContainsStr(noEndTags, token.Data) {
@@ -673,9 +705,9 @@ OUTER_LOOP:
 
 // Render renders Markdown to HTML with all specific handling stuff.
 func render(rawBytes []byte, urlPrefix string, metas map[string]string, isWikiMarkdown bool) []byte {
-	urlPrefix = strings.Replace(urlPrefix, " ", "%20", -1)
+	urlPrefix = strings.Replace(urlPrefix, " ", "+", -1)
 	result := RenderRaw(rawBytes, urlPrefix, isWikiMarkdown)
-	result = PostProcess(result, urlPrefix, metas)
+	result = PostProcess(result, urlPrefix, metas, isWikiMarkdown)
 	result = Sanitizer.SanitizeBytes(result)
 	return result
 }

modules/markdown/markdown_test.go

@@ -55,7 +55,7 @@ func testRenderIssueIndexPattern(t *testing.T, input, expected string, metas map
 		string(RenderIssueIndexPattern([]byte(input), AppSubURL, metas)))
 }
 
-func TestRenderIssueIndexPattern(t *testing.T) {
+func TestRender_IssueIndexPattern(t *testing.T) {
 	// numeric: render inputs without valid mentions
 	test := func(s string) {
 		testRenderIssueIndexPattern(t, s, s, nil)
@@ -82,7 +82,7 @@ func TestRenderIssueIndexPattern(t *testing.T) {
 	test("test #54321issue")
 }
 
-func TestRenderIssueIndexPattern2(t *testing.T) {
+func TestRender_IssueIndexPattern2(t *testing.T) {
 	setting.AppURL = AppURL
 	setting.AppSubURL = AppSubURL
 
@@ -119,7 +119,7 @@ func TestRenderIssueIndexPattern2(t *testing.T) {
 	test("#1 (#4321) test", "%s (%s) test", 1, 4321)
 }
 
-func TestRenderIssueIndexPattern3(t *testing.T) {
+func TestRender_IssueIndexPattern3(t *testing.T) {
 	setting.AppURL = AppURL
 	setting.AppSubURL = AppSubURL
 
@@ -146,7 +146,7 @@ func TestRenderIssueIndexPattern3(t *testing.T) {
 	test("ABC-0123")         // no leading zero
 }
 
-func TestRenderIssueIndexPattern4(t *testing.T) {
+func TestRender_IssueIndexPattern4(t *testing.T) {
 	setting.AppURL = AppURL
 	setting.AppSubURL = AppSubURL
 
@@ -164,15 +164,15 @@ func TestRenderIssueIndexPattern4(t *testing.T) {
 	test("test issue ABCDEFGHIJ-1234567890", "test issue %s", "ABCDEFGHIJ-1234567890")
 }
 
-func TestRenderer_AutoLink(t *testing.T) {
+func TestRender_AutoLink(t *testing.T) {
 	setting.AppURL = AppURL
 	setting.AppSubURL = AppSubURL
 
-	SubURLNoProtocol := setting.AppSubURL[5:]
-
 	test := func(input, expected string) {
-		buffer := RenderSpecialLink([]byte(input), setting.AppSubURL, map[string]string{})
-		assert.Equal(t, expected, string(buffer))
+		buffer := RenderSpecialLink([]byte(input), setting.AppSubURL, nil, false)
+		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(string(buffer)))
+		buffer = RenderSpecialLink([]byte(input), setting.AppSubURL, nil, true)
+		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(string(buffer)))
 	}
 
 	// render valid issue URLs
@@ -180,54 +180,98 @@ func TestRenderer_AutoLink(t *testing.T) {
 		numericIssueLink(URLJoin(setting.AppSubURL, "issues"), 3333))
 
 	// render external issue URLs
-	tmp := "//1111/2222/ssss-issues/3333?param=blah&blahh=333"
-	test("http:"+tmp,
-		"<a href=\""+tmp+"\">#3333 <i class='comment icon'></i></a>")
-	test("http://test.com/issues/33333", numericIssueLink("//test.com/issues", 33333))
-	test("https://issues/333", numericIssueLink("//issues", 333))
+	tmp := "http://1111/2222/ssss-issues/3333?param=blah&blahh=333"
+	test(tmp, "<a href=\""+tmp+"\">#3333 <i class='comment icon'></i></a>")
+	test("http://test.com/issues/33333", numericIssueLink("http://test.com/issues", 33333))
+	test("https://issues/333", numericIssueLink("https://issues", 333))
 
 	// render valid commit URLs
-	tmp = URLJoin(SubURLNoProtocol, "commit", "d8a994ef243349f321568f9e36d5c3f444b99cae")
-	test("http://"+tmp, "<a href=\""+tmp+"\">d8a994ef24</a>")
+	tmp = URLJoin(AppSubURL, "commit", "d8a994ef243349f321568f9e36d5c3f444b99cae")
+	test(tmp, "<a href=\""+tmp+"\">d8a994ef24</a>")
 	tmp += "#diff-2"
-	test("http://"+tmp, "<a href=\""+tmp+"\">d8a994ef24 (diff-2)</a>")
+	test(tmp, "<a href=\""+tmp+"\">d8a994ef24 (diff-2)</a>")
 
 	// render other commit URLs
-	tmp = "//external-link.gogs.io/gogs/gogs/commit/d8a994ef243349f321568f9e36d5c3f444b99cae#diff-2"
-	test("https:"+tmp, "<a href=\""+tmp+"\">d8a994ef24 (diff-2)</a>")
+	tmp = "https://external-link.gogs.io/gogs/gogs/commit/d8a994ef243349f321568f9e36d5c3f444b99cae#diff-2"
+	test(tmp, "<a href=\""+tmp+"\">d8a994ef24 (diff-2)</a>")
 }
 
-func TestRender_ShortLinks(t *testing.T) {
+func TestRender_StandardLinks(t *testing.T) {
 	setting.AppURL = AppURL
 	setting.AppSubURL = AppSubURL
 
-	test := func(input, expected string) {
+	test := func(input, expected, expectedWiki string) {
 		buffer := RenderString(input, setting.AppSubURL, nil)
-		assert.Equal(t, expected, string(buffer))
-	}
-
-	var url = URLJoin(AppSubURL, "wiki", "Link")
-	var imgurl = URLJoin(AppSubURL, "wiki", "raw", "Link.jpg")
-	var favicon = "http://google.com/favicon.ico"
-
-	test("[[Link]]", `<p><a href="`+url+`" rel="nofollow">Link</a></p>
-`)
-	test("[[Link.jpg]]", `<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="Link.jpg" title="Link.jpg"/></a></p>
-`)
-	test("[["+favicon+"]]", `<p><a href="`+favicon+`" rel="nofollow"><img src="`+favicon+`" title="favicon.ico"/></a></p>
-`)
-	test("[[Name|Link]]", `<p><a href="`+url+`" rel="nofollow">Name</a></p>
-`)
-	test("[[Name|Link.jpg]]", `<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="Name" title="Name"/></a></p>
-`)
-	test("[[Name|Link.jpg|alt=AltName]]", `<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="AltName" title="AltName"/></a></p>
-`)
-	test("[[Name|Link.jpg|title=Title]]", `<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="Title" title="Title"/></a></p>
-`)
-	test("[[Name|Link.jpg|alt=AltName|title=Title]]", `<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="AltName" title="Title"/></a></p>
-`)
-	test("[[Name|Link.jpg|alt=\"AltName\"|title='Title']]", `<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="AltName" title="Title"/></a></p>
-`)
+		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(string(buffer)))
+		bufferWiki := RenderWiki([]byte(input), setting.AppSubURL, nil)
+		assert.Equal(t, strings.TrimSpace(expectedWiki), strings.TrimSpace(bufferWiki))
+	}
+
+	googleRendered := `<p><a href="https://google.com/" rel="nofollow">https://google.com/</a></p>`
+	test("<https://google.com/>", googleRendered, googleRendered)
+
+	lnk := URLJoin(AppSubURL, "WikiPage")
+	lnkWiki := URLJoin(AppSubURL, "wiki", "WikiPage")
+	test("[WikiPage](WikiPage)",
+		`<p><a href="`+lnk+`" rel="nofollow">WikiPage</a></p>`,
+		`<p><a href="`+lnkWiki+`" rel="nofollow">WikiPage</a></p>`)
+}
+
+func TestRender_ShortLinks(t *testing.T) {
+	setting.AppURL = AppURL
+	setting.AppSubURL = AppSubURL
+	tree := URLJoin(AppSubURL, "src", "master")
+
+	test := func(input, expected, expectedWiki string) {
+		buffer := RenderString(input, tree, nil)
+		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(string(buffer)))
+		buffer = RenderWiki([]byte(input), setting.AppSubURL, nil)
+		assert.Equal(t, strings.TrimSpace(expectedWiki), strings.TrimSpace(string(buffer)))
+	}
+
+	rawtree := URLJoin(AppSubURL, "raw", "master")
+	url := URLJoin(tree, "Link")
+	imgurl := URLJoin(rawtree, "Link.jpg")
+	urlWiki := URLJoin(AppSubURL, "wiki", "Link")
+	imgurlWiki := URLJoin(AppSubURL, "wiki", "raw", "Link.jpg")
+	favicon := "http://google.com/favicon.ico"
+
+	test(
+		"[[Link]]",
+		`<p><a href="`+url+`" rel="nofollow">Link</a></p>`,
+		`<p><a href="`+urlWiki+`" rel="nofollow">Link</a></p>`)
+	test(
+		"[[Link.jpg]]",
+		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="Link.jpg" title="Link.jpg"/></a></p>`,
+		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" alt="Link.jpg" title="Link.jpg"/></a></p>`)
+	test(
+		"[["+favicon+"]]",
+		`<p><a href="`+favicon+`" rel="nofollow"><img src="`+favicon+`" title="favicon.ico"/></a></p>`,
+		`<p><a href="`+favicon+`" rel="nofollow"><img src="`+favicon+`" title="favicon.ico"/></a></p>`)
+	test(
+		"[[Name|Link]]",
+		`<p><a href="`+url+`" rel="nofollow">Name</a></p>`,
+		`<p><a href="`+urlWiki+`" rel="nofollow">Name</a></p>`)
+	test(
+		"[[Name|Link.jpg]]",
+		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="Name" title="Name"/></a></p>`,
+		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" alt="Name" title="Name"/></a></p>`)
+	test(
+		"[[Name|Link.jpg|alt=AltName]]",
+		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="AltName" title="AltName"/></a></p>`,
+		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" alt="AltName" title="AltName"/></a></p>`)
+	test(
+		"[[Name|Link.jpg|title=Title]]",
+		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="Title" title="Title"/></a></p>`,
+		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" alt="Title" title="Title"/></a></p>`)
+	test(
+		"[[Name|Link.jpg|alt=AltName|title=Title]]",
+		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="AltName" title="Title"/></a></p>`,
+		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" alt="AltName" title="Title"/></a></p>`)
+	test(
+		"[[Name|Link.jpg|alt=\"AltName\"|title='Title']]",
+		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" alt="AltName" title="Title"/></a></p>`,
+		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" alt="AltName" title="Title"/></a></p>`)
 }
 
 func TestRender_Commits(t *testing.T) {
@@ -236,7 +280,7 @@ func TestRender_Commits(t *testing.T) {
 
 	test := func(input, expected string) {
 		buffer := RenderString(input, setting.AppSubURL, nil)
-		assert.Equal(t, expected, string(buffer))
+		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(string(buffer)))
 	}
 
 	var sha = "b6dd6210eaebc915fd5be5579c58cce4da2e2579"
@@ -245,12 +289,45 @@ func TestRender_Commits(t *testing.T) {
 	var tree = strings.Replace(subtree, "/commit/", "/tree/", -1)
 	var src = strings.Replace(subtree, "/commit/", "/src/", -1)
 
-	test(sha, `<p><a href="`+commit+`" rel="nofollow">b6dd6210ea</a></p>
-`)
-	test(commit, `<p><a href="`+commit[5:]+`" rel="nofollow">b6dd6210ea</a></p>
-`)
-	test(tree, `<p><a href="`+src[5:]+`" rel="nofollow">b6dd6210ea/src</a></p>
-`)
+	test(sha, `<p><a href="`+commit+`" rel="nofollow">b6dd6210ea</a></p>`)
+	test(commit, `<p><a href="`+commit+`" rel="nofollow">b6dd6210ea</a></p>`)
+	test(tree, `<p><a href="`+src+`" rel="nofollow">b6dd6210ea/src</a></p>`)
+}
+
+func TestRender_Images(t *testing.T) {
+	setting.AppURL = AppURL
+	setting.AppSubURL = AppSubURL
+
+	test := func(input, expected string) {
+		buffer := RenderString(input, setting.AppSubURL, nil)
+		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(string(buffer)))
+	}
+
+	url := "../../.images/src/02/train.jpg"
+	title := "Train"
+	result := URLJoin(AppSubURL, url)
+
+	test(
+		"!["+title+"]("+url+")",
+		`<p><a href="`+result+`" rel="nofollow"><img src="`+result+`" alt="`+title+`"></a></p>`)
+
+	test(
+		"[["+title+"|"+url+"]]",
+		`<p><a href="`+result+`" rel="nofollow"><img src="`+result+`" alt="`+title+`" title="`+title+`"/></a></p>`)
+}
+
+func TestRender_CrossReferences(t *testing.T) {
+	setting.AppURL = AppURL
+	setting.AppSubURL = AppSubURL
+
+	test := func(input, expected string) {
+		buffer := RenderString(input, setting.AppSubURL, nil)
+		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(string(buffer)))
+	}
+
+	test(
+		"gogits/gogs#12345",
+		`<p><a href="`+URLJoin(AppURL, "gogits", "gogs", "issues", "12345")+`" rel="nofollow">gogits/gogs#12345</a></p>`)
 }
 
 func TestRegExp_MentionPattern(t *testing.T) {
@@ -387,6 +464,7 @@ func TestRegExp_ShortLinkPattern(t *testing.T) {
 func TestRegExp_AnySHA1Pattern(t *testing.T) {
 	testCases := map[string][]string{
 		"https://github.com/jquery/jquery/blob/a644101ed04d0beacea864ce805e0c4f86ba1cd1/test/unit/event.js#L2703": []string{
+			"https",
 			"github.com",
 			"jquery",
 			"jquery",
@@ -396,6 +474,7 @@ func TestRegExp_AnySHA1Pattern(t *testing.T) {
 			"L2703",
 		},
 		"https://github.com/jquery/jquery/blob/a644101ed04d0beacea864ce805e0c4f86ba1cd1/test/unit/event.js": []string{
+			"https",
 			"github.com",
 			"jquery",
 			"jquery",
@@ -405,6 +484,7 @@ func TestRegExp_AnySHA1Pattern(t *testing.T) {
 			"",
 		},
 		"https://github.com/jquery/jquery/commit/0705be475092aede1eddae01319ec931fb9c65fc": []string{
+			"https",
 			"github.com",
 			"jquery",
 			"jquery",
@@ -414,6 +494,7 @@ func TestRegExp_AnySHA1Pattern(t *testing.T) {
 			"",
 		},
 		"https://github.com/jquery/jquery/tree/0705be475092aede1eddae01319ec931fb9c65fc/src": []string{
+			"https",
 			"github.com",
 			"jquery",
 			"jquery",
@@ -423,6 +504,7 @@ func TestRegExp_AnySHA1Pattern(t *testing.T) {
 			"",
 		},
 		"https://try.gogs.io/gogs/gogs/commit/d8a994ef243349f321568f9e36d5c3f444b99cae#diff-2": []string{
+			"https",
 			"try.gogs.io",
 			"gogs",
 			"gogs",
@@ -441,30 +523,35 @@ func TestRegExp_AnySHA1Pattern(t *testing.T) {
 func TestRegExp_IssueFullPattern(t *testing.T) {
 	testCases := map[string][]string{
 		"https://github.com/gogits/gogs/pull/3244": []string{
+			"https",
 			"github.com/gogits/gogs/pull/",
 			"3244",
 			"",
 			"",
 		},
 		"https://github.com/gogits/gogs/issues/3247#issuecomment-231517079": []string{
+			"https",
 			"github.com/gogits/gogs/issues/",
 			"3247",
 			"#issuecomment-231517079",
 			"",
 		},
 		"https://try.gogs.io/gogs/gogs/issues/4#issue-685": []string{
+			"https",
 			"try.gogs.io/gogs/gogs/issues/",
 			"4",
 			"#issue-685",
 			"",
 		},
 		"https://youtrack.jetbrains.com/issue/JT-36485": []string{
+			"https",
 			"youtrack.jetbrains.com/issue/",
 			"JT-36485",
 			"",
 			"",
 		},
 		"https://youtrack.jetbrains.com/issue/JT-36485#comment=27-1508676": []string{
+			"https",
 			"youtrack.jetbrains.com/issue/",
 			"JT-36485",
 			"#comment=27-1508676",
@@ -549,23 +636,6 @@ Ideas and codes
 - Node graph editors https://github.com/ocornut/imgui/issues/306
 - [[Memory Editor|memory_editor_example]]
 - [[Plot var helper|plot_var_example]]`,
-	// rendered
-	`<p>Wiki! Enjoy :)</p>
-
-<ul>
-<li><a href="` + AppSubURL + `wiki/Links" rel="nofollow">Links, Language bindings, Engine bindings</a></li>
-<li><a href="` + AppSubURL + `wiki/Tips" rel="nofollow">Tips</a></li>
-</ul>
-
-<p>Ideas and codes</p>
-
-<ul>
-<li>Bezier widget (by <a href="` + AppURL + `r-lyeh" rel="nofollow">@r-lyeh</a>)<a href="` + AppSubURL + `issues/786" rel="nofollow">#786</a></li>
-<li>Node graph editors<a href="` + AppSubURL + `issues/306" rel="nofollow">#306</a></li>
-<li><a href="` + AppSubURL + `wiki/memory_editor_example" rel="nofollow">Memory Editor</a></li>
-<li><a href="` + AppSubURL + `wiki/plot_var_example" rel="nofollow">Plot var helper</a></li>
-</ul>
-`,
 	// wine-staging wiki home extract: tables, special wiki syntax, images
 	`## What is Wine Staging?
 **Wine Staging** on website [wine-staging.com](http://wine-staging.com).
@@ -576,10 +646,34 @@ Here are some links to the most important topics. You can find the full list of
 | [[images/icon-install.png]]    | [[Installation]]                                         |
 |--------------------------------|----------------------------------------------------------|
 | [[images/icon-usage.png]]      | [[Usage]]                                                |
-| [[images/icon-config.png]]     | [[Configuration]]                                        |
-| [[images/icon-bug.png]]        | [Bugs](http://bugs.wine-staging.com)                     |
 `,
-	// rendered
+	// libgdx wiki page: inline images with special syntax
+	`[Excelsior JET](http://www.excelsiorjet.com/) allows you to create native executables for Windows, Linux and Mac OS X.
+
+1. [Package your libGDX application](https://github.com/libgdx/libgdx/wiki/Gradle-on-the-Commandline#packaging-for-the-desktop)
+[[images/1.png]]
+2. Perform a test run by hitting the Run! button.
+[[images/2.png]]`,
+}
+
+func testAnswers(baseURLContent, baseURLImages string) []string {
+	return []string{
+		`<p>Wiki! Enjoy :)</p>
+
+<ul>
+<li><a href="` + baseURLContent + `Links" rel="nofollow">Links, Language bindings, Engine bindings</a></li>
+<li><a href="` + baseURLContent + `Tips" rel="nofollow">Tips</a></li>
+</ul>
+
+<p>Ideas and codes</p>
+
+<ul>
+<li>Bezier widget (by <a href="` + AppURL + `r-lyeh" rel="nofollow">@r-lyeh</a>)<a href="https://github.com/ocornut/imgui/issues/786" rel="nofollow">#786</a></li>
+<li>Node graph editors<a href="https://github.com/ocornut/imgui/issues/306" rel="nofollow">#306</a></li>
+<li><a href="` + baseURLContent + `memory_editor_example" rel="nofollow">Memory Editor</a></li>
+<li><a href="` + baseURLContent + `plot_var_example" rel="nofollow">Plot var helper</a></li>
+</ul>
+`,
 		`<h2>What is Wine Staging?</h2>
 
 <p><strong>Wine Staging</strong> on website <a href="http://wine-staging.com" rel="nofollow">wine-staging.com</a>.</p>
@@ -591,66 +685,53 @@ Here are some links to the most important topics. You can find the full list of
 <table>
 <thead>
 <tr>
-<th><a href="` + AppSubURL + `wiki/raw/images%2Ficon-install.png" rel="nofollow"><img src="` + AppSubURL + `wiki/raw/images%2Ficon-install.png" alt="images/icon-install.png" title="icon-install.png"/></a></th>
-<th><a href="` + AppSubURL + `wiki/Installation" rel="nofollow">Installation</a></th>
+<th><a href="` + baseURLImages + `images/icon-install.png" rel="nofollow"><img src="` + baseURLImages + `images/icon-install.png" alt="images/icon-install.png" title="icon-install.png"/></a></th>
+<th><a href="` + baseURLContent + `Installation" rel="nofollow">Installation</a></th>
 </tr>
 </thead>
 
 <tbody>
 <tr>
-<td><a href="` + AppSubURL + `wiki/raw/images%2Ficon-usage.png" rel="nofollow"><img src="` + AppSubURL + `wiki/raw/images%2Ficon-usage.png" alt="images/icon-usage.png" title="icon-usage.png"/></a></td>
-<td><a href="` + AppSubURL + `wiki/Usage" rel="nofollow">Usage</a></td>
-</tr>
-
-<tr>
-<td><a href="` + AppSubURL + `wiki/raw/images%2Ficon-config.png" rel="nofollow"><img src="` + AppSubURL + `wiki/raw/images%2Ficon-config.png" alt="images/icon-config.png" title="icon-config.png"/></a></td>
-<td><a href="` + AppSubURL + `wiki/Configuration" rel="nofollow">Configuration</a></td>
-</tr>
-
-<tr>
-<td><a href="` + AppSubURL + `wiki/raw/images%2Ficon-bug.png" rel="nofollow"><img src="` + AppSubURL + `wiki/raw/images%2Ficon-bug.png" alt="images/icon-bug.png" title="icon-bug.png"/></a></td>
-<td><a href="http://bugs.wine-staging.com" rel="nofollow">Bugs</a></td>
+<td><a href="` + baseURLImages + `images/icon-usage.png" rel="nofollow"><img src="` + baseURLImages + `images/icon-usage.png" alt="images/icon-usage.png" title="icon-usage.png"/></a></td>
+<td><a href="` + baseURLContent + `Usage" rel="nofollow">Usage</a></td>
 </tr>
 </tbody>
 </table>
 `,
-	// libgdx wiki page: inline images with special syntax
-	`[Excelsior JET](http://www.excelsiorjet.com/) allows you to create native executables for Windows, Linux and Mac OS X.
-
-1. [Package your libGDX application](https://github.com/libgdx/libgdx/wiki/Gradle-on-the-Commandline#packaging-for-the-desktop)
-[[images/1.png]]
-2. Perform a test run by hitting the Run! button.
-[[images/2.png]]`,
-	// rendered
 		`<p><a href="http://www.excelsiorjet.com/" rel="nofollow">Excelsior JET</a> allows you to create native executables for Windows, Linux and Mac OS X.</p>
 
 <ol>
 <li><a href="https://github.com/libgdx/libgdx/wiki/Gradle-on-the-Commandline#packaging-for-the-desktop" rel="nofollow">Package your libGDX application</a>
-<a href="` + AppSubURL + `wiki/raw/images%2F1.png" rel="nofollow"><img src="` + AppSubURL + `wiki/raw/images%2F1.png" alt="images/1.png" title="1.png"/></a></li>
+<a href="` + baseURLImages + `images/1.png" rel="nofollow"><img src="` + baseURLImages + `images/1.png" alt="images/1.png" title="1.png"/></a></li>
 <li>Perform a test run by hitting the Run! button.
-<a href="` + AppSubURL + `wiki/raw/images%2F2.png" rel="nofollow"><img src="` + AppSubURL + `wiki/raw/images%2F2.png" alt="images/2.png" title="2.png"/></a></li>
+<a href="` + baseURLImages + `images/2.png" rel="nofollow"><img src="` + baseURLImages + `images/2.png" alt="images/2.png" title="2.png"/></a></li>
 </ol>
 `,
 	}
+}
 
 func TestTotal_RenderString(t *testing.T) {
-	for i := 0; i < len(sameCases); i += 2 {
-		line := RenderString(sameCases[i], AppSubURL, map[string]string{})
-		assert.Equal(t, sameCases[i+1], line)
+	answers := testAnswers(URLJoin(AppSubURL, "src", "master/"), URLJoin(AppSubURL, "raw", "master/"))
+
+	for i := 0; i < len(sameCases); i++ {
+		line := RenderString(sameCases[i], URLJoin(AppSubURL, "src", "master/"), nil)
+		assert.Equal(t, answers[i], line)
 	}
 
 	testCases := []string{}
 
 	for i := 0; i < len(testCases); i += 2 {
-		line := RenderString(testCases[i], AppSubURL, map[string]string{})
+		line := RenderString(testCases[i], AppSubURL, nil)
 		assert.Equal(t, testCases[i+1], line)
 	}
 }
 
 func TestTotal_RenderWiki(t *testing.T) {
-	for i := 0; i < len(sameCases); i += 2 {
-		line := RenderWiki([]byte(sameCases[i]), AppSubURL, map[string]string{})
-		assert.Equal(t, sameCases[i+1], line)
+	answers := testAnswers(URLJoin(AppSubURL, "wiki/"), URLJoin(AppSubURL, "wiki", "raw/"))
+
+	for i := 0; i < len(sameCases); i++ {
+		line := RenderWiki([]byte(sameCases[i]), AppSubURL, nil)
+		assert.Equal(t, answers[i], line)
 	}
 
 	testCases := []string{
@@ -667,7 +748,7 @@ func TestTotal_RenderWiki(t *testing.T) {
 	}
 
 	for i := 0; i < len(testCases); i += 2 {
-		line := RenderWiki([]byte(testCases[i]), AppSubURL, map[string]string{})
+		line := RenderWiki([]byte(testCases[i]), AppSubURL, nil)
 		assert.Equal(t, testCases[i+1], line)
 	}
 }

routers/api/v1/misc/markdown.go

@@ -27,7 +27,13 @@ func Markdown(ctx *context.APIContext, form api.MarkdownOption) {
 
 	switch form.Mode {
 	case "gfm":
-		ctx.Write(markdown.Render([]byte(form.Text), markdown.URLJoin(setting.AppURL, form.Context), nil))
+		md := []byte(form.Text)
+		context := markdown.URLJoin(setting.AppURL, form.Context)
+		if form.Wiki {
+			ctx.Write([]byte(markdown.RenderWiki(md, context, nil)))
+		} else {
+			ctx.Write(markdown.Render(md, context, nil))
+		}
 	default:
 		ctx.Write(markdown.RenderRaw([]byte(form.Text), "", false))
 	}

routers/api/v1/misc/markdown_test.go

@@ -53,6 +53,7 @@ func TestAPI_RenderGFM(t *testing.T) {
 		Mode:    "gfm",
 		Text:    "",
 		Context: Repo,
+		Wiki:    true,
 	}
 	requrl, _ := url.Parse(markdown.URLJoin(AppURL, "api", "v1", "markdown"))
 	req := &http.Request{
@@ -74,7 +75,7 @@ func TestAPI_RenderGFM(t *testing.T) {
 <ul>
 <li><a href="` + AppSubURL + `wiki/Links" rel="nofollow">Links, Language bindings, Engine bindings</a></li>
 <li><a href="` + AppSubURL + `wiki/Tips" rel="nofollow">Tips</a></li>
-<li>Bezier widget (by <a href="` + AppURL + `r-lyeh" rel="nofollow">@r-lyeh</a>)<a href="` + AppSubURL + `issues/786" rel="nofollow">#786</a></li>
+<li>Bezier widget (by <a href="` + AppURL + `r-lyeh" rel="nofollow">@r-lyeh</a>)<a href="https://github.com/ocornut/imgui/issues/786" rel="nofollow">#786</a></li>
 </ul>
 `,
 		// wine-staging wiki home extract: special wiki syntax, images
@@ -97,7 +98,7 @@ Here are some links to the most important topics. You can find the full list of
 <p>Here are some links to the most important topics. You can find the full list of pages at the sidebar.</p>
 
 <p><a href="` + AppSubURL + `wiki/Configuration" rel="nofollow">Configuration</a>
-<a href="` + AppSubURL + `wiki/raw/images%2Ficon-bug.png" rel="nofollow"><img src="` + AppSubURL + `wiki/raw/images%2Ficon-bug.png" alt="images/icon-bug.png" title="icon-bug.png"/></a></p>
+<a href="` + AppSubURL + `wiki/raw/images/icon-bug.png" rel="nofollow"><img src="` + AppSubURL + `wiki/raw/images/icon-bug.png" alt="images/icon-bug.png" title="icon-bug.png"/></a></p>
 `,
 		// Guard wiki sidebar: special syntax
 		`[[Guardfile-DSL / Configuring-Guard|Guardfile-DSL---Configuring-Guard]]`,

vendor/code.gitea.io/sdk/gitea/miscellaneous.go

@@ -9,4 +9,5 @@ type MarkdownOption struct {
 	Text    string
 	Mode    string
 	Context string
+	Wiki    bool
 }