Make repository response support HTTP range request (#24592)

Replace #20480
Replace #18448

Close #16414

modules/httplib/serve_test.go

@@ -0,0 +1,109 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package httplib
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestServeContentByReader(t *testing.T) {
+	data := "0123456789abcdef"
+
+	test := func(t *testing.T, expectedStatusCode int, expectedContent string) {
+		_, rangeStr, _ := strings.Cut(t.Name(), "_range_")
+		r := &http.Request{Header: http.Header{}, Form: url.Values{}}
+		if rangeStr != "" {
+			r.Header.Set("Range", fmt.Sprintf("bytes=%s", rangeStr))
+		}
+		reader := strings.NewReader(data)
+		w := NewMockResponseWriter()
+		ServeContentByReader(r, w, "test", int64(len(data)), reader)
+		assert.Equal(t, expectedStatusCode, w.StatusCode)
+		if expectedStatusCode == http.StatusPartialContent || expectedStatusCode == http.StatusOK {
+			assert.Equal(t, fmt.Sprint(len(expectedContent)), w.Header().Get("Content-Length"))
+			assert.Equal(t, expectedContent, w.BodyBuffer.String())
+		}
+	}
+
+	t.Run("_range_", func(t *testing.T) {
+		test(t, http.StatusOK, data)
+	})
+	t.Run("_range_0-", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data)
+	})
+	t.Run("_range_0-15", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data)
+	})
+	t.Run("_range_1-", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data[1:])
+	})
+	t.Run("_range_1-3", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data[1:3+1])
+	})
+	t.Run("_range_16-", func(t *testing.T) {
+		test(t, http.StatusRequestedRangeNotSatisfiable, "")
+	})
+	t.Run("_range_1-99999", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data[1:])
+	})
+}
+
+func TestServeContentByReadSeeker(t *testing.T) {
+	data := "0123456789abcdef"
+	tmpFile := t.TempDir() + "/test"
+	err := os.WriteFile(tmpFile, []byte(data), 0o644)
+	assert.NoError(t, err)
+
+	test := func(t *testing.T, expectedStatusCode int, expectedContent string) {
+		_, rangeStr, _ := strings.Cut(t.Name(), "_range_")
+		r := &http.Request{Header: http.Header{}, Form: url.Values{}}
+		if rangeStr != "" {
+			r.Header.Set("Range", fmt.Sprintf("bytes=%s", rangeStr))
+		}
+
+		seekReader, err := os.OpenFile(tmpFile, os.O_RDONLY, 0o644)
+		if !assert.NoError(t, err) {
+			return
+		}
+		defer seekReader.Close()
+
+		w := NewMockResponseWriter()
+		ServeContentByReadSeeker(r, w, "test", time.Time{}, seekReader)
+		assert.Equal(t, expectedStatusCode, w.StatusCode)
+		if expectedStatusCode == http.StatusPartialContent || expectedStatusCode == http.StatusOK {
+			assert.Equal(t, fmt.Sprint(len(expectedContent)), w.Header().Get("Content-Length"))
+			assert.Equal(t, expectedContent, w.BodyBuffer.String())
+		}
+	}
+
+	t.Run("_range_", func(t *testing.T) {
+		test(t, http.StatusOK, data)
+	})
+	t.Run("_range_0-", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data)
+	})
+	t.Run("_range_0-15", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data)
+	})
+	t.Run("_range_1-", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data[1:])
+	})
+	t.Run("_range_1-3", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data[1:3+1])
+	})
+	t.Run("_range_16-", func(t *testing.T) {
+		test(t, http.StatusRequestedRangeNotSatisfiable, "")
+	})
+	t.Run("_range_1-99999", func(t *testing.T) {
+		test(t, http.StatusPartialContent, data[1:])
+	})
+}