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// Copyright 2011 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 multipart
import (
"bytes"
"io"
"mime"
"net/textproto"
"strings"
"testing"
)
func TestWriter(t *testing.T) {
fileContents := []byte("my file contents")
var b bytes.Buffer
w := NewWriter(&b)
{
part, err := w.CreateFormFile("myfile", "my-file.txt")
if err != nil {
t.Fatalf("CreateFormFile: %v", err)
}
part.Write(fileContents)
err = w.WriteField("key", "val")
if err != nil {
t.Fatalf("WriteField: %v", err)
}
part.Write([]byte("val"))
err = w.Close()
if err != nil {
t.Fatalf("Close: %v", err)
}
s := b.String()
if len(s) == 0 {
t.Fatal("String: unexpected empty result")
}
if s[0] == '\r' || s[0] == '\n' {
t.Fatal("String: unexpected newline")
}
}
r := NewReader(&b, w.Boundary())
part, err := r.NextPart()
if err != nil {
t.Fatalf("part 1: %v", err)
}
if g, e := part.FormName(), "myfile"; g != e {
t.Errorf("part 1: want form name %q, got %q", e, g)
}
slurp, err := io.ReadAll(part)
if err != nil {
t.Fatalf("part 1: ReadAll: %v", err)
}
if e, g := string(fileContents), string(slurp); e != g {
t.Errorf("part 1: want contents %q, got %q", e, g)
}
part, err = r.NextPart()
if err != nil {
t.Fatalf("part 2: %v", err)
}
if g, e := part.FormName(), "key"; g != e {
t.Errorf("part 2: want form name %q, got %q", e, g)
}
slurp, err = io.ReadAll(part)
if err != nil {
t.Fatalf("part 2: ReadAll: %v", err)
}
if e, g := "val", string(slurp); e != g {
t.Errorf("part 2: want contents %q, got %q", e, g)
}
part, err = r.NextPart()
if part != nil || err == nil {
t.Fatalf("expected end of parts; got %v, %v", part, err)
}
}
func TestWriterSetBoundary(t *testing.T) {
tests := []struct {
b string
ok bool
}{
{"abc", true},
{"", false},
{"ungültig", false},
{"!", false},
{strings.Repeat("x", 70), true},
{strings.Repeat("x", 71), false},
{"bad!ascii!", false},
{"my-separator", true},
{"with space", true},
{"badspace ", false},
{"(boundary)", true},
}
for i, tt := range tests {
var b bytes.Buffer
w := NewWriter(&b)
err := w.SetBoundary(tt.b)
got := err == nil
if got != tt.ok {
t.Errorf("%d. boundary %q = %v (%v); want %v", i, tt.b, got, err, tt.ok)
} else if tt.ok {
got := w.Boundary()
if got != tt.b {
t.Errorf("boundary = %q; want %q", got, tt.b)
}
ct := w.FormDataContentType()
mt, params, err := mime.ParseMediaType(ct)
if err != nil {
t.Errorf("could not parse Content-Type %q: %v", ct, err)
} else if mt != "multipart/form-data" {
t.Errorf("unexpected media type %q; want %q", mt, "multipart/form-data")
} else if b := params["boundary"]; b != tt.b {
t.Errorf("unexpected boundary parameter %q; want %q", b, tt.b)
}
w.Close()
wantSub := "\r\n--" + tt.b + "--\r\n"
if got := b.String(); !strings.Contains(got, wantSub) {
t.Errorf("expected %q in output. got: %q", wantSub, got)
}
}
}
}
func TestWriterBoundaryGoroutines(t *testing.T) {
// Verify there's no data race accessing any lazy boundary if it's used by
// different goroutines. This was previously broken by
// https://codereview.appspot.com/95760043/ and reverted in
// https://codereview.appspot.com/117600043/
w := NewWriter(io.Discard)
done := make(chan int)
go func() {
w.CreateFormField("foo")
done <- 1
}()
w.Boundary()
<-done
}
func TestSortedHeader(t *testing.T) {
var buf bytes.Buffer
w := NewWriter(&buf)
if err := w.SetBoundary("MIMEBOUNDARY"); err != nil {
t.Fatalf("Error setting mime boundary: %v", err)
}
header := textproto.MIMEHeader{
"A": {"2"},
"B": {"5", "7", "6"},
"C": {"4"},
"M": {"3"},
"Z": {"1"},
}
part, err := w.CreatePart(header)
if err != nil {
t.Fatalf("Unable to create part: %v", err)
}
part.Write([]byte("foo"))
w.Close()
want := "--MIMEBOUNDARY\r\nA: 2\r\nB: 5\r\nB: 7\r\nB: 6\r\nC: 4\r\nM: 3\r\nZ: 1\r\n\r\nfoo\r\n--MIMEBOUNDARY--\r\n"
if want != buf.String() {
t.Fatalf("\n got: %q\nwant: %q\n", buf.String(), want)
}
}
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