1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
| import (
"fmt"
"io"
"log"
"math/rand"
"mime/multipart"
"net/http"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
"time"
)
var blacklistChars = []rune{'<', '>', '"', '\'', '\\', '?', '*', '{', '}', '\t', '\n', '\r'}
func main() {
// 设置路由
http.HandleFunc("/gojava", compileJava)
http.HandleFunc("/testExecYourJarOnServer", testExecYourJarOnServer)
// 设置静态文件服务器
fs := http.FileServer(http.Dir("."))
http.Handle("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// 检查请求的路径是否需要被禁止访问
if isForbiddenPath(r.URL.Path) {
http.Error(w, "Forbidden", http.StatusForbidden)
return
}
// 否则，继续处理其他请求
fs.ServeHTTP(w, r)
}))
// 启动服务器
log.Println("Server started on :80")
log.Fatal(http.ListenAndServe(":80", nil))
}
func isForbiddenPath(path string) bool {
// 检查路径是否为某个特定文件或文件夹的路径
// 这里可以根据你的需求进行设置
forbiddenPaths := []string{
"/main.go",
"/upload/",
}
// 检查请求的路径是否与禁止访问的路径匹配
for _, forbiddenPath := range forbiddenPaths {
if strings.HasPrefix(path, forbiddenPath) {
return true
}
}
return false
}
func isFilenameBlacklisted(filename string) bool {
for _, char := range filename {
for _, blackChar := range blacklistChars {
if char == blackChar {
return true
}
}
}
return false
}
// compileJava 处理上传并编译Java文件的请求
func compileJava(w http.ResponseWriter, r *http.Request) {
// 检查请求方法是否为POST
if r.Method != http.MethodPost {
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
return
}
// 解析multipart/form-data格式的表单数据
err := r.ParseMultipartForm(10 << 20) // 设置最大文件大小为10MB
if err != nil {
http.Error(w, "Error parsing form", http.StatusInternalServerError)
return
}
// 从表单中获取上传的文件
file, handler, err := r.FormFile("file")
if err != nil {
http.Error(w, "Error retrieving file", http.StatusBadRequest)
return
}
defer file.Close()
if isFilenameBlacklisted(handler.Filename) {
http.Error(w, "Invalid filename: contains blacklisted character", http.StatusBadRequest)
return
}
// 检查文件扩展名是否为.java
if !strings.HasSuffix(handler.Filename, ".java") {
http.Error(w, "Invalid file format, please select a .java file", http.StatusBadRequest)
return
}
// 保存上传的文件至./upload文件夹
err = saveFile(file, "./upload/"+handler.Filename)
if err != nil {
http.Error(w, "Error saving file", http.StatusInternalServerError)
return
}
// 生成随机文件名
rand.Seed(time.Now().UnixNano())
randomName := strconv.FormatInt(rand.Int63(), 16) + ".jar"
// 编译Java文件
cmd := "javac ./upload/" + handler.Filename
compileCmd := exec.Command("sh", "-c", cmd)
//compileCmd := exec.Command("javac", "./upload/"+handler.Filename)
compileOutput, err := compileCmd.CombinedOutput()
if err != nil {
http.Error(w, "Error compiling Java file: "+string(compileOutput), http.StatusInternalServerError)
return
}
// 将编译后的.class文件打包成.jar文件
fileNameWithoutExtension := strings.TrimSuffix(handler.Filename, filepath.Ext(handler.Filename))
jarCmd := exec.Command("jar", "cvfe", "./final/"+randomName, fileNameWithoutExtension, "-C", "./upload", strings.TrimSuffix(handler.Filename, ".java")+".class")
jarOutput, err := jarCmd.CombinedOutput()
if err != nil {
http.Error(w, "Error creating JAR file: "+string(jarOutput), http.StatusInternalServerError)
return
}
// 返回编译后的.jar文件的下载链接
fmt.Fprintf(w, "/final/%s", randomName)
}
// saveFile 保存上传的文件
func saveFile(file multipart.File, filePath string) error {
// 创建目标文件
f, err := os.Create(filePath)
if err != nil {
return err
}
defer f.Close()
// 将上传的文件内容复制到目标文件中
_, err = io.Copy(f, file)
if err != nil {
return err
}
return nil
}
func testExecYourJarOnServer(w http.ResponseWriter, r *http.Request) {
jarFile := "./final/" + r.URL.Query().Get("jar")
// 检查是否存在指定的.jar文件
if !strings.HasSuffix(jarFile, ".jar") {
http.Error(w, "Invalid jar file format", http.StatusBadRequest)
return
}
if _, err := os.Stat(jarFile); os.IsNotExist(err) {
http.Error(w, "Jar file not found", http.StatusNotFound)
return
}
// 执行.jar文件
cmd := exec.Command("java", "-jar", jarFile)
output, err := cmd.CombinedOutput()
if err != nil {
http.Error(w, "Error running jar file: "+string(output), http.StatusInternalServerError)
return
}
// 输出结果
w.Header().Set("Content-Type", "text/plain")
w.Write(output)
}
|
