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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package http
import (
"fmt"
"io/ioutil"
"net"
"os"
"sync"
"testing"
)
var ParseRangeTests = []struct {
s string
length int64
r []httpRange
}{
{"", 0, nil},
{"foo", 0, nil},
{"bytes=", 0, nil},
{"bytes=5-4", 10, nil},
{"bytes=0-2,5-4", 10, nil},
{"bytes=0-9", 10, []httpRange{{0, 10}}},
{"bytes=0-", 10, []httpRange{{0, 10}}},
{"bytes=5-", 10, []httpRange{{5, 5}}},
{"bytes=0-20", 10, []httpRange{{0, 10}}},
{"bytes=15-,0-5", 10, nil},
{"bytes=-5", 10, []httpRange{{5, 5}}},
{"bytes=-15", 10, []httpRange{{0, 10}}},
{"bytes=0-499", 10000, []httpRange{{0, 500}}},
{"bytes=500-999", 10000, []httpRange{{500, 500}}},
{"bytes=-500", 10000, []httpRange{{9500, 500}}},
{"bytes=9500-", 10000, []httpRange{{9500, 500}}},
{"bytes=0-0,-1", 10000, []httpRange{{0, 1}, {9999, 1}}},
{"bytes=500-600,601-999", 10000, []httpRange{{500, 101}, {601, 399}}},
{"bytes=500-700,601-999", 10000, []httpRange{{500, 201}, {601, 399}}},
}
func TestParseRange(t *testing.T) {
for _, test := range ParseRangeTests {
r := test.r
ranges, err := parseRange(test.s, test.length)
if err != nil && r != nil {
t.Errorf("parseRange(%q) returned error %q", test.s, err)
}
if len(ranges) != len(r) {
t.Errorf("len(parseRange(%q)) = %d, want %d", test.s, len(ranges), len(r))
continue
}
for i := range r {
if ranges[i].start != r[i].start {
t.Errorf("parseRange(%q)[%d].start = %d, want %d", test.s, i, ranges[i].start, r[i].start)
}
if ranges[i].length != r[i].length {
t.Errorf("parseRange(%q)[%d].length = %d, want %d", test.s, i, ranges[i].length, r[i].length)
}
}
}
}
const (
testFile = "testdata/file"
testFileLength = 11
)
var (
serverOnce sync.Once
serverAddr string
)
func startServer(t *testing.T) {
serverOnce.Do(func() {
HandleFunc("/ServeFile", func(w ResponseWriter, r *Request) {
ServeFile(w, r, "testdata/file")
})
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatal("listen:", err)
}
serverAddr = l.Addr().String()
go Serve(l, nil)
})
}
var ServeFileRangeTests = []struct {
start, end int
r string
code int
}{
{0, testFileLength, "", StatusOK},
{0, 5, "0-4", StatusPartialContent},
{2, testFileLength, "2-", StatusPartialContent},
{testFileLength - 5, testFileLength, "-5", StatusPartialContent},
{3, 8, "3-7", StatusPartialContent},
{0, 0, "20-", StatusRequestedRangeNotSatisfiable},
}
func TestServeFile(t *testing.T) {
startServer(t)
var err os.Error
file, err := ioutil.ReadFile(testFile)
if err != nil {
t.Fatal("reading file:", err)
}
// set up the Request (re-used for all tests)
var req Request
req.Header = make(map[string]string)
if req.URL, err = ParseURL("http://" + serverAddr + "/ServeFile"); err != nil {
t.Fatal("ParseURL:", err)
}
req.Method = "GET"
// straight GET
_, body := getBody(t, req)
if !equal(body, file) {
t.Fatalf("body mismatch: got %q, want %q", body, file)
}
// Range tests
for _, rt := range ServeFileRangeTests {
req.Header["Range"] = "bytes=" + rt.r
if rt.r == "" {
req.Header["Range"] = ""
}
r, body := getBody(t, req)
if r.StatusCode != rt.code {
t.Errorf("range=%q: StatusCode=%d, want %d", rt.r, r.StatusCode, rt.code)
}
if rt.code == StatusRequestedRangeNotSatisfiable {
continue
}
h := fmt.Sprintf("bytes %d-%d/%d", rt.start, rt.end-1, testFileLength)
if rt.r == "" {
h = ""
}
if r.Header["Content-Range"] != h {
t.Errorf("header mismatch: range=%q: got %q, want %q", rt.r, r.Header["Content-Range"], h)
}
if !equal(body, file[rt.start:rt.end]) {
t.Errorf("body mismatch: range=%q: got %q, want %q", rt.r, body, file[rt.start:rt.end])
}
}
}
func getBody(t *testing.T, req Request) (*Response, []byte) {
r, err := send(&req)
if err != nil {
t.Fatal(req.URL.String(), "send:", err)
}
b, err := ioutil.ReadAll(r.Body)
if err != nil {
t.Fatal("reading Body:", err)
}
return r, b
}
func equal(a, b []byte) bool {
if len(a) != len(b) {
return false
}
for i := range a {
if a[i] != b[i] {
return false
}
}
return true
}
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