611 lines
18 KiB
Go
611 lines
18 KiB
Go
// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package multipart
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net/textproto"
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"os"
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"reflect"
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"strings"
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"testing"
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)
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func TestBoundaryLine(t *testing.T) {
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mr := NewReader(strings.NewReader(""), "myBoundary")
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if !mr.isBoundaryDelimiterLine([]byte("--myBoundary\r\n")) {
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t.Error("expected")
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}
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if !mr.isBoundaryDelimiterLine([]byte("--myBoundary \r\n")) {
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t.Error("expected")
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}
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if !mr.isBoundaryDelimiterLine([]byte("--myBoundary \n")) {
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t.Error("expected")
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}
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if mr.isBoundaryDelimiterLine([]byte("--myBoundary bogus \n")) {
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t.Error("expected fail")
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}
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if mr.isBoundaryDelimiterLine([]byte("--myBoundary bogus--")) {
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t.Error("expected fail")
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}
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}
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func escapeString(v string) string {
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bytes, _ := json.Marshal(v)
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return string(bytes)
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}
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func expectEq(t *testing.T, expected, actual, what string) {
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if expected == actual {
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return
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}
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t.Errorf("Unexpected value for %s; got %s (len %d) but expected: %s (len %d)",
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what, escapeString(actual), len(actual), escapeString(expected), len(expected))
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}
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func TestNameAccessors(t *testing.T) {
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tests := [...][3]string{
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{`form-data; name="foo"`, "foo", ""},
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{` form-data ; name=foo`, "foo", ""},
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{`FORM-DATA;name="foo"`, "foo", ""},
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{` FORM-DATA ; name="foo"`, "foo", ""},
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{` FORM-DATA ; name="foo"`, "foo", ""},
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{` FORM-DATA ; name=foo`, "foo", ""},
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{` FORM-DATA ; filename="foo.txt"; name=foo; baz=quux`, "foo", "foo.txt"},
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{` not-form-data ; filename="bar.txt"; name=foo; baz=quux`, "", "bar.txt"},
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}
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for i, test := range tests {
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p := &Part{Header: make(map[string][]string)}
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p.Header.Set("Content-Disposition", test[0])
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if g, e := p.FormName(), test[1]; g != e {
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t.Errorf("test %d: FormName() = %q; want %q", i, g, e)
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}
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if g, e := p.FileName(), test[2]; g != e {
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t.Errorf("test %d: FileName() = %q; want %q", i, g, e)
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}
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}
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}
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var longLine = strings.Repeat("\n\n\r\r\r\n\r\000", (1<<20)/8)
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func testMultipartBody(sep string) string {
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testBody := `
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This is a multi-part message. This line is ignored.
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--MyBoundary
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Header1: value1
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HEADER2: value2
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foo-bar: baz
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My value
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The end.
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--MyBoundary
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name: bigsection
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[longline]
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--MyBoundary
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Header1: value1b
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HEADER2: value2b
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foo-bar: bazb
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Line 1
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Line 2
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Line 3 ends in a newline, but just one.
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--MyBoundary
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never read data
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--MyBoundary--
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useless trailer
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`
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testBody = strings.Replace(testBody, "\n", sep, -1)
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return strings.Replace(testBody, "[longline]", longLine, 1)
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}
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func TestMultipart(t *testing.T) {
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bodyReader := strings.NewReader(testMultipartBody("\r\n"))
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testMultipart(t, bodyReader, false)
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}
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func TestMultipartOnlyNewlines(t *testing.T) {
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bodyReader := strings.NewReader(testMultipartBody("\n"))
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testMultipart(t, bodyReader, true)
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}
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func TestMultipartSlowInput(t *testing.T) {
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bodyReader := strings.NewReader(testMultipartBody("\r\n"))
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testMultipart(t, &slowReader{bodyReader}, false)
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}
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func testMultipart(t *testing.T, r io.Reader, onlyNewlines bool) {
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reader := NewReader(r, "MyBoundary")
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buf := new(bytes.Buffer)
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// Part1
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part, err := reader.NextPart()
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if part == nil || err != nil {
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t.Error("Expected part1")
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return
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}
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if x := part.Header.Get("Header1"); x != "value1" {
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t.Errorf("part.Header.Get(%q) = %q, want %q", "Header1", x, "value1")
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}
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if x := part.Header.Get("foo-bar"); x != "baz" {
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t.Errorf("part.Header.Get(%q) = %q, want %q", "foo-bar", x, "baz")
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}
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if x := part.Header.Get("Foo-Bar"); x != "baz" {
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t.Errorf("part.Header.Get(%q) = %q, want %q", "Foo-Bar", x, "baz")
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}
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buf.Reset()
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if _, err := io.Copy(buf, part); err != nil {
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t.Errorf("part 1 copy: %v", err)
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}
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adjustNewlines := func(s string) string {
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if onlyNewlines {
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return strings.Replace(s, "\r\n", "\n", -1)
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}
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return s
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}
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expectEq(t, adjustNewlines("My value\r\nThe end."), buf.String(), "Value of first part")
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// Part2
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part, err = reader.NextPart()
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if err != nil {
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t.Fatalf("Expected part2; got: %v", err)
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return
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}
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if e, g := "bigsection", part.Header.Get("name"); e != g {
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t.Errorf("part2's name header: expected %q, got %q", e, g)
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}
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buf.Reset()
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if _, err := io.Copy(buf, part); err != nil {
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t.Errorf("part 2 copy: %v", err)
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}
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s := buf.String()
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if len(s) != len(longLine) {
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t.Errorf("part2 body expected long line of length %d; got length %d",
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len(longLine), len(s))
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}
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if s != longLine {
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t.Errorf("part2 long body didn't match")
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}
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// Part3
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part, err = reader.NextPart()
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if part == nil || err != nil {
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t.Error("Expected part3")
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return
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}
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if part.Header.Get("foo-bar") != "bazb" {
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t.Error("Expected foo-bar: bazb")
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}
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buf.Reset()
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if _, err := io.Copy(buf, part); err != nil {
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t.Errorf("part 3 copy: %v", err)
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}
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expectEq(t, adjustNewlines("Line 1\r\nLine 2\r\nLine 3 ends in a newline, but just one.\r\n"),
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buf.String(), "body of part 3")
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// Part4
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part, err = reader.NextPart()
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if part == nil || err != nil {
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t.Error("Expected part 4 without errors")
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return
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}
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// Non-existent part5
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part, err = reader.NextPart()
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if part != nil {
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t.Error("Didn't expect a fifth part.")
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}
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if err != io.EOF {
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t.Errorf("On fifth part expected io.EOF; got %v", err)
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}
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}
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func TestVariousTextLineEndings(t *testing.T) {
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tests := [...]string{
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"Foo\nBar",
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"Foo\nBar\n",
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"Foo\r\nBar",
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"Foo\r\nBar\r\n",
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"Foo\rBar",
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"Foo\rBar\r",
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"\x00\x01\x02\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10",
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}
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for testNum, expectedBody := range tests {
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body := "--BOUNDARY\r\n" +
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"Content-Disposition: form-data; name=\"value\"\r\n" +
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"\r\n" +
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expectedBody +
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"\r\n--BOUNDARY--\r\n"
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bodyReader := strings.NewReader(body)
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reader := NewReader(bodyReader, "BOUNDARY")
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buf := new(bytes.Buffer)
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part, err := reader.NextPart()
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if part == nil {
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t.Errorf("Expected a body part on text %d", testNum)
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continue
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}
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if err != nil {
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t.Errorf("Unexpected error on text %d: %v", testNum, err)
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continue
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}
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written, err := io.Copy(buf, part)
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expectEq(t, expectedBody, buf.String(), fmt.Sprintf("test %d", testNum))
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if err != nil {
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t.Errorf("Error copying multipart; bytes=%v, error=%v", written, err)
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}
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part, err = reader.NextPart()
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if part != nil {
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t.Errorf("Unexpected part in test %d", testNum)
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}
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if err != io.EOF {
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t.Errorf("On test %d expected io.EOF; got %v", testNum, err)
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}
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}
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}
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type maliciousReader struct {
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t *testing.T
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n int
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}
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const maxReadThreshold = 1 << 20
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func (mr *maliciousReader) Read(b []byte) (n int, err error) {
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mr.n += len(b)
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if mr.n >= maxReadThreshold {
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mr.t.Fatal("too much was read")
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return 0, io.EOF
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}
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return len(b), nil
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}
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func TestLineLimit(t *testing.T) {
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mr := &maliciousReader{t: t}
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r := NewReader(mr, "fooBoundary")
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part, err := r.NextPart()
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if part != nil {
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t.Errorf("unexpected part read")
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}
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if err == nil {
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t.Errorf("expected an error")
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}
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if mr.n >= maxReadThreshold {
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t.Errorf("expected to read < %d bytes; read %d", maxReadThreshold, mr.n)
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}
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}
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func TestMultipartTruncated(t *testing.T) {
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testBody := `
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This is a multi-part message. This line is ignored.
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--MyBoundary
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foo-bar: baz
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Oh no, premature EOF!
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`
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body := strings.Replace(testBody, "\n", "\r\n", -1)
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bodyReader := strings.NewReader(body)
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r := NewReader(bodyReader, "MyBoundary")
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part, err := r.NextPart()
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if err != nil {
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t.Fatalf("didn't get a part")
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}
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_, err = io.Copy(ioutil.Discard, part)
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if err != io.ErrUnexpectedEOF {
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t.Fatalf("expected error io.ErrUnexpectedEOF; got %v", err)
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}
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}
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type slowReader struct {
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r io.Reader
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}
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func (s *slowReader) Read(p []byte) (int, error) {
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if len(p) == 0 {
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return s.r.Read(p)
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}
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return s.r.Read(p[:1])
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}
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func TestLineContinuation(t *testing.T) {
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// This body, extracted from an email, contains headers that span multiple
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// lines.
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// TODO: The original mail ended with a double-newline before the
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// final delimiter; this was manually edited to use a CRLF.
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testBody :=
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"\n--Apple-Mail-2-292336769\nContent-Transfer-Encoding: 7bit\nContent-Type: text/plain;\n\tcharset=US-ASCII;\n\tdelsp=yes;\n\tformat=flowed\n\nI'm finding the same thing happening on my system (10.4.1).\n\n\n--Apple-Mail-2-292336769\nContent-Transfer-Encoding: quoted-printable\nContent-Type: text/html;\n\tcharset=ISO-8859-1\n\n<HTML><BODY>I'm finding the same thing =\nhappening on my system (10.4.1).=A0 But I built it with XCode =\n2.0.</BODY></=\nHTML>=\n\r\n--Apple-Mail-2-292336769--\n"
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r := NewReader(strings.NewReader(testBody), "Apple-Mail-2-292336769")
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for i := 0; i < 2; i++ {
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part, err := r.NextPart()
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if err != nil {
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t.Fatalf("didn't get a part")
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}
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n, err := io.Copy(ioutil.Discard, part)
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if err != nil {
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t.Errorf("error reading part: %v", err)
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}
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if n <= 0 {
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t.Errorf("read %d bytes; expected >0", n)
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}
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}
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}
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// Test parsing an image attachment from gmail, which previously failed.
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func TestNested(t *testing.T) {
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// nested-mime is the body part of a multipart/mixed email
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// with boundary e89a8ff1c1e83553e304be640612
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f, err := os.Open("testdata/nested-mime")
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if err != nil {
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t.Fatal(err)
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}
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defer f.Close()
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mr := NewReader(f, "e89a8ff1c1e83553e304be640612")
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p, err := mr.NextPart()
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if err != nil {
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t.Fatalf("error reading first section (alternative): %v", err)
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}
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// Read the inner text/plain and text/html sections of the multipart/alternative.
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mr2 := NewReader(p, "e89a8ff1c1e83553e004be640610")
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p, err = mr2.NextPart()
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if err != nil {
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t.Fatalf("reading text/plain part: %v", err)
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}
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if b, err := ioutil.ReadAll(p); string(b) != "*body*\r\n" || err != nil {
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t.Fatalf("reading text/plain part: got %q, %v", b, err)
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}
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p, err = mr2.NextPart()
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if err != nil {
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t.Fatalf("reading text/html part: %v", err)
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}
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if b, err := ioutil.ReadAll(p); string(b) != "<b>body</b>\r\n" || err != nil {
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t.Fatalf("reading text/html part: got %q, %v", b, err)
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}
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p, err = mr2.NextPart()
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if err != io.EOF {
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t.Fatalf("final inner NextPart = %v; want io.EOF", err)
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}
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// Back to the outer multipart/mixed, reading the image attachment.
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_, err = mr.NextPart()
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if err != nil {
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t.Fatalf("error reading the image attachment at the end: %v", err)
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}
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_, err = mr.NextPart()
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if err != io.EOF {
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t.Fatalf("final outer NextPart = %v; want io.EOF", err)
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}
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}
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type headerBody struct {
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header textproto.MIMEHeader
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body string
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}
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func formData(key, value string) headerBody {
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return headerBody{
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textproto.MIMEHeader{
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"Content-Type": {"text/plain; charset=ISO-8859-1"},
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"Content-Disposition": {"form-data; name=" + key},
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},
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value,
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}
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}
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type parseTest struct {
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name string
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in, sep string
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want []headerBody
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}
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var parseTests = []parseTest{
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// Actual body from App Engine on a blob upload. The final part (the
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// Content-Type: message/external-body) is what App Engine replaces
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// the uploaded file with. The other form fields (prefixed with
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// "other" in their form-data name) are unchanged. A bug was
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// reported with blob uploads failing when the other fields were
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// empty. This was the MIME POST body that previously failed.
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{
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name: "App Engine post",
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sep: "00151757727e9583fd04bfbca4c6",
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in: "--00151757727e9583fd04bfbca4c6\r\nContent-Type: text/plain; charset=ISO-8859-1\r\nContent-Disposition: form-data; name=otherEmpty1\r\n\r\n--00151757727e9583fd04bfbca4c6\r\nContent-Type: text/plain; charset=ISO-8859-1\r\nContent-Disposition: form-data; name=otherFoo1\r\n\r\nfoo\r\n--00151757727e9583fd04bfbca4c6\r\nContent-Type: text/plain; charset=ISO-8859-1\r\nContent-Disposition: form-data; name=otherFoo2\r\n\r\nfoo\r\n--00151757727e9583fd04bfbca4c6\r\nContent-Type: text/plain; charset=ISO-8859-1\r\nContent-Disposition: form-data; name=otherEmpty2\r\n\r\n--00151757727e9583fd04bfbca4c6\r\nContent-Type: text/plain; charset=ISO-8859-1\r\nContent-Disposition: form-data; name=otherRepeatFoo\r\n\r\nfoo\r\n--00151757727e9583fd04bfbca4c6\r\nContent-Type: text/plain; charset=ISO-8859-1\r\nContent-Disposition: form-data; name=otherRepeatFoo\r\n\r\nfoo\r\n--00151757727e9583fd04bfbca4c6\r\nContent-Type: text/plain; charset=ISO-8859-1\r\nContent-Disposition: form-data; name=otherRepeatEmpty\r\n\r\n--00151757727e9583fd04bfbca4c6\r\nContent-Type: text/plain; charset=ISO-8859-1\r\nContent-Disposition: form-data; name=otherRepeatEmpty\r\n\r\n--00151757727e9583fd04bfbca4c6\r\nContent-Type: text/plain; charset=ISO-8859-1\r\nContent-Disposition: form-data; name=submit\r\n\r\nSubmit\r\n--00151757727e9583fd04bfbca4c6\r\nContent-Type: message/external-body; charset=ISO-8859-1; blob-key=AHAZQqG84qllx7HUqO_oou5EvdYQNS3Mbbkb0RjjBoM_Kc1UqEN2ygDxWiyCPulIhpHRPx-VbpB6RX4MrsqhWAi_ZxJ48O9P2cTIACbvATHvg7IgbvZytyGMpL7xO1tlIvgwcM47JNfv_tGhy1XwyEUO8oldjPqg5Q\r\nContent-Disposition: form-data; name=file; filename=\"fall.png\"\r\n\r\nContent-Type: image/png\r\nContent-Length: 232303\r\nX-AppEngine-Upload-Creation: 2012-05-10 23:14:02.715173\r\nContent-MD5: MzRjODU1ZDZhZGU1NmRlOWEwZmMwMDdlODBmZTA0NzA=\r\nContent-Disposition: form-data; name=file; filename=\"fall.png\"\r\n\r\n\r\n--00151757727e9583fd04bfbca4c6--",
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want: []headerBody{
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formData("otherEmpty1", ""),
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formData("otherFoo1", "foo"),
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formData("otherFoo2", "foo"),
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formData("otherEmpty2", ""),
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formData("otherRepeatFoo", "foo"),
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formData("otherRepeatFoo", "foo"),
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formData("otherRepeatEmpty", ""),
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formData("otherRepeatEmpty", ""),
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formData("submit", "Submit"),
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{textproto.MIMEHeader{
|
|
"Content-Type": {"message/external-body; charset=ISO-8859-1; blob-key=AHAZQqG84qllx7HUqO_oou5EvdYQNS3Mbbkb0RjjBoM_Kc1UqEN2ygDxWiyCPulIhpHRPx-VbpB6RX4MrsqhWAi_ZxJ48O9P2cTIACbvATHvg7IgbvZytyGMpL7xO1tlIvgwcM47JNfv_tGhy1XwyEUO8oldjPqg5Q"},
|
|
"Content-Disposition": {"form-data; name=file; filename=\"fall.png\""},
|
|
}, "Content-Type: image/png\r\nContent-Length: 232303\r\nX-AppEngine-Upload-Creation: 2012-05-10 23:14:02.715173\r\nContent-MD5: MzRjODU1ZDZhZGU1NmRlOWEwZmMwMDdlODBmZTA0NzA=\r\nContent-Disposition: form-data; name=file; filename=\"fall.png\"\r\n\r\n"},
|
|
},
|
|
},
|
|
|
|
// Single empty part, ended with --boundary immediately after headers.
|
|
{
|
|
name: "single empty part, --boundary",
|
|
sep: "abc",
|
|
in: "--abc\r\nFoo: bar\r\n\r\n--abc--",
|
|
want: []headerBody{
|
|
{textproto.MIMEHeader{"Foo": {"bar"}}, ""},
|
|
},
|
|
},
|
|
|
|
// Single empty part, ended with \r\n--boundary immediately after headers.
|
|
{
|
|
name: "single empty part, \r\n--boundary",
|
|
sep: "abc",
|
|
in: "--abc\r\nFoo: bar\r\n\r\n\r\n--abc--",
|
|
want: []headerBody{
|
|
{textproto.MIMEHeader{"Foo": {"bar"}}, ""},
|
|
},
|
|
},
|
|
|
|
// Final part empty.
|
|
{
|
|
name: "final part empty",
|
|
sep: "abc",
|
|
in: "--abc\r\nFoo: bar\r\n\r\n--abc\r\nFoo2: bar2\r\n\r\n--abc--",
|
|
want: []headerBody{
|
|
{textproto.MIMEHeader{"Foo": {"bar"}}, ""},
|
|
{textproto.MIMEHeader{"Foo2": {"bar2"}}, ""},
|
|
},
|
|
},
|
|
|
|
// Final part empty with newlines after final separator.
|
|
{
|
|
name: "final part empty then crlf",
|
|
sep: "abc",
|
|
in: "--abc\r\nFoo: bar\r\n\r\n--abc--\r\n",
|
|
want: []headerBody{
|
|
{textproto.MIMEHeader{"Foo": {"bar"}}, ""},
|
|
},
|
|
},
|
|
|
|
// Final part empty with lwsp-chars after final separator.
|
|
{
|
|
name: "final part empty then lwsp",
|
|
sep: "abc",
|
|
in: "--abc\r\nFoo: bar\r\n\r\n--abc-- \t",
|
|
want: []headerBody{
|
|
{textproto.MIMEHeader{"Foo": {"bar"}}, ""},
|
|
},
|
|
},
|
|
|
|
// No parts (empty form as submitted by Chrome)
|
|
{
|
|
name: "no parts",
|
|
sep: "----WebKitFormBoundaryQfEAfzFOiSemeHfA",
|
|
in: "------WebKitFormBoundaryQfEAfzFOiSemeHfA--\r\n",
|
|
want: []headerBody{},
|
|
},
|
|
|
|
// Part containing data starting with the boundary, but with additional suffix.
|
|
{
|
|
name: "fake separator as data",
|
|
sep: "sep",
|
|
in: "--sep\r\nFoo: bar\r\n\r\n--sepFAKE\r\n--sep--",
|
|
want: []headerBody{
|
|
{textproto.MIMEHeader{"Foo": {"bar"}}, "--sepFAKE"},
|
|
},
|
|
},
|
|
|
|
// Part containing a boundary with whitespace following it.
|
|
{
|
|
name: "boundary with whitespace",
|
|
sep: "sep",
|
|
in: "--sep \r\nFoo: bar\r\n\r\ntext\r\n--sep--",
|
|
want: []headerBody{
|
|
{textproto.MIMEHeader{"Foo": {"bar"}}, "text"},
|
|
},
|
|
},
|
|
|
|
// With ignored leading line.
|
|
{
|
|
name: "leading line",
|
|
sep: "MyBoundary",
|
|
in: strings.Replace(`This is a multi-part message. This line is ignored.
|
|
--MyBoundary
|
|
foo: bar
|
|
|
|
|
|
--MyBoundary--`, "\n", "\r\n", -1),
|
|
want: []headerBody{
|
|
{textproto.MIMEHeader{"Foo": {"bar"}}, ""},
|
|
},
|
|
},
|
|
|
|
roundTripParseTest(),
|
|
}
|
|
|
|
func TestParse(t *testing.T) {
|
|
Cases:
|
|
for _, tt := range parseTests {
|
|
r := NewReader(strings.NewReader(tt.in), tt.sep)
|
|
got := []headerBody{}
|
|
for {
|
|
p, err := r.NextPart()
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
if err != nil {
|
|
t.Errorf("in test %q, NextPart: %v", tt.name, err)
|
|
continue Cases
|
|
}
|
|
pbody, err := ioutil.ReadAll(p)
|
|
if err != nil {
|
|
t.Errorf("in test %q, error reading part: %v", tt.name, err)
|
|
continue Cases
|
|
}
|
|
got = append(got, headerBody{p.Header, string(pbody)})
|
|
}
|
|
if !reflect.DeepEqual(tt.want, got) {
|
|
t.Errorf("test %q:\n got: %v\nwant: %v", tt.name, got, tt.want)
|
|
if len(tt.want) != len(got) {
|
|
t.Errorf("test %q: got %d parts, want %d", tt.name, len(got), len(tt.want))
|
|
} else if len(got) > 1 {
|
|
for pi, wantPart := range tt.want {
|
|
if !reflect.DeepEqual(wantPart, got[pi]) {
|
|
t.Errorf("test %q, part %d:\n got: %v\nwant: %v", tt.name, pi, got[pi], wantPart)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func roundTripParseTest() parseTest {
|
|
t := parseTest{
|
|
name: "round trip",
|
|
want: []headerBody{
|
|
formData("empty", ""),
|
|
formData("lf", "\n"),
|
|
formData("cr", "\r"),
|
|
formData("crlf", "\r\n"),
|
|
formData("foo", "bar"),
|
|
},
|
|
}
|
|
var buf bytes.Buffer
|
|
w := NewWriter(&buf)
|
|
for _, p := range t.want {
|
|
pw, err := w.CreatePart(p.header)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
_, err = pw.Write([]byte(p.body))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
w.Close()
|
|
t.in = buf.String()
|
|
t.sep = w.Boundary()
|
|
return t
|
|
}
|