mirror of https://github.com/go-gitea/gitea
137 lines
5.8 KiB
Go
137 lines
5.8 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package typesniffer
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import (
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"bytes"
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"encoding/base64"
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"encoding/hex"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestDetectContentTypeLongerThanSniffLen(t *testing.T) {
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// Pre-condition: Shorter than sniffLen detects SVG.
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assert.Equal(t, "image/svg+xml", DetectContentType([]byte(`<!-- Comment --><svg></svg>`)).contentType)
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// Longer than sniffLen detects something else.
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assert.NotEqual(t, "image/svg+xml", DetectContentType([]byte(`<!-- `+strings.Repeat("x", sniffLen)+` --><svg></svg>`)).contentType)
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}
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func TestIsTextFile(t *testing.T) {
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assert.True(t, DetectContentType([]byte{}).IsText())
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assert.True(t, DetectContentType([]byte("lorem ipsum")).IsText())
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}
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func TestIsSvgImage(t *testing.T) {
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assert.True(t, DetectContentType([]byte("<svg></svg>")).IsSvgImage())
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assert.True(t, DetectContentType([]byte(" <svg></svg>")).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<svg width="100"></svg>`)).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?><svg></svg>`)).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<!-- Comment -->
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<svg></svg>`)).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<!-- Multiple -->
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<!-- Comments -->
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<svg></svg>`)).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<!-- Multiline
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Comment -->
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<svg></svg>`)).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1 Basic//EN"
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"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-basic.dtd">
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<svg></svg>`)).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?>
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<!-- Comment -->
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<svg></svg>`)).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?>
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<!-- Multiple -->
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<!-- Comments -->
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<svg></svg>`)).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?>
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<!-- Multline
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Comment -->
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<svg></svg>`)).IsSvgImage())
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assert.True(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
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<!-- Multline
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Comment -->
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<svg></svg>`)).IsSvgImage())
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// the DetectContentType should work for incomplete data, because only beginning bytes are used for detection
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assert.True(t, DetectContentType([]byte(`<svg>....`)).IsSvgImage())
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assert.False(t, DetectContentType([]byte{}).IsSvgImage())
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assert.False(t, DetectContentType([]byte("svg")).IsSvgImage())
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assert.False(t, DetectContentType([]byte("<svgfoo></svgfoo>")).IsSvgImage())
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assert.False(t, DetectContentType([]byte("text<svg></svg>")).IsSvgImage())
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assert.False(t, DetectContentType([]byte("<html><body><svg></svg></body></html>")).IsSvgImage())
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assert.False(t, DetectContentType([]byte(`<script>"<svg></svg>"</script>`)).IsSvgImage())
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assert.False(t, DetectContentType([]byte(`<!-- <svg></svg> inside comment -->
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<foo></foo>`)).IsSvgImage())
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assert.False(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?>
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<!-- <svg></svg> inside comment -->
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<foo></foo>`)).IsSvgImage())
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assert.False(t, DetectContentType([]byte(`
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<!-- comment1 -->
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<div>
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<!-- comment2 -->
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<svg></svg>
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</div>
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`)).IsSvgImage())
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assert.False(t, DetectContentType([]byte(`
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<!-- comment1
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-->
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<div>
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<!-- comment2
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-->
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<svg></svg>
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</div>
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`)).IsSvgImage())
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assert.False(t, DetectContentType([]byte(`<html><body><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg></svg></body></html>`)).IsSvgImage())
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assert.False(t, DetectContentType([]byte(`<html><body><?xml version="1.0" encoding="UTF-8"?><svg></svg></body></html>`)).IsSvgImage())
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}
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func TestIsPDF(t *testing.T) {
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pdf, _ := base64.StdEncoding.DecodeString("JVBERi0xLjYKJcOkw7zDtsOfCjIgMCBvYmoKPDwvTGVuZ3RoIDMgMCBSL0ZpbHRlci9GbGF0ZURlY29kZT4+CnN0cmVhbQp4nF3NPwsCMQwF8D2f4s2CNYk1baF0EHRwOwg4iJt/NsFb/PpevUE4Mjwe")
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assert.True(t, DetectContentType(pdf).IsPDF())
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assert.False(t, DetectContentType([]byte("plain text")).IsPDF())
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}
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func TestIsVideo(t *testing.T) {
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mp4, _ := base64.StdEncoding.DecodeString("AAAAGGZ0eXBtcDQyAAAAAGlzb21tcDQyAAEI721vb3YAAABsbXZoZAAAAADaBlwX2gZcFwAAA+gA")
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assert.True(t, DetectContentType(mp4).IsVideo())
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assert.False(t, DetectContentType([]byte("plain text")).IsVideo())
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}
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func TestIsAudio(t *testing.T) {
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mp3, _ := base64.StdEncoding.DecodeString("SUQzBAAAAAABAFRYWFgAAAASAAADbWFqb3JfYnJhbmQAbXA0MgBUWFhYAAAAEQAAA21pbm9yX3Zl")
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assert.True(t, DetectContentType(mp3).IsAudio())
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assert.False(t, DetectContentType([]byte("plain text")).IsAudio())
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assert.True(t, DetectContentType([]byte("ID3Toy\000")).IsAudio())
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assert.True(t, DetectContentType([]byte("ID3Toy\n====\t* hi 🌞, ...")).IsText()) // test ID3 tag for plain text
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assert.True(t, DetectContentType([]byte("ID3Toy\n====\t* hi 🌞, ..."+"🌛"[0:2])).IsText()) // test ID3 tag with incomplete UTF8 char
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}
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func TestDetectContentTypeFromReader(t *testing.T) {
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mp3, _ := base64.StdEncoding.DecodeString("SUQzBAAAAAABAFRYWFgAAAASAAADbWFqb3JfYnJhbmQAbXA0MgBUWFhYAAAAEQAAA21pbm9yX3Zl")
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st, err := DetectContentTypeFromReader(bytes.NewReader(mp3))
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assert.NoError(t, err)
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assert.True(t, st.IsAudio())
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}
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func TestDetectContentTypeOgg(t *testing.T) {
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oggAudio, _ := hex.DecodeString("4f67675300020000000000000000352f0000000000007dc39163011e01766f72626973000000000244ac0000000000000071020000000000b8014f6767530000")
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st, err := DetectContentTypeFromReader(bytes.NewReader(oggAudio))
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assert.NoError(t, err)
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assert.True(t, st.IsAudio())
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oggVideo, _ := hex.DecodeString("4f676753000200000000000000007d9747ef000000009b59daf3012a807468656f7261030201001e00110001e000010e00020000001e00000001000001000001")
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st, err = DetectContentTypeFromReader(bytes.NewReader(oggVideo))
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assert.NoError(t, err)
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assert.True(t, st.IsVideo())
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}
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