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
183
|
// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package middleware_test
import (
"context"
"crypto/sha256"
"encoding/hex"
"io"
"net/http"
"net/http/httptest"
"slices"
"strconv"
"strings"
"testing"
"code.superseriousbusiness.org/gotosocial/internal/api/model"
apiutil "code.superseriousbusiness.org/gotosocial/internal/api/util"
"code.superseriousbusiness.org/gotosocial/internal/config"
"code.superseriousbusiness.org/gotosocial/internal/gtserror"
"code.superseriousbusiness.org/gotosocial/internal/middleware"
"code.superseriousbusiness.org/gotosocial/internal/router"
"codeberg.org/gruf/go-byteutil"
"github.com/gin-gonic/gin"
"github.com/stretchr/testify/assert"
)
func TestNoLLaMasMiddleware(t *testing.T) {
// Gin test engine.
e := gin.New()
// Setup necessary configuration variables.
config.SetAdvancedScraperDeterrenceEnabled(true)
config.SetWebTemplateBaseDir("../../web/template")
// Load templates into engine.
err := router.LoadTemplates(e)
assert.NoError(t, err)
// Add middleware to the gin engine handler stack.
middleware := middleware.NoLLaMas(apiutil.CookiePolicy{}, getInstanceV1)
e.Use(middleware)
// Set test handler we can
// easily check if was used.
e.Handle("GET", "/", testHandler)
// Test with differing user-agents.
for _, userAgent := range []string{
"CURL",
"Mozilla FireSox",
"Google Gnome",
} {
testNoLLaMasMiddleware(t, e, userAgent)
}
}
func testNoLLaMasMiddleware(t *testing.T, e *gin.Engine, userAgent string) {
// Prepare a test request for gin engine.
r := httptest.NewRequest("GET", "/", nil)
r.Header.Set("User-Agent", userAgent)
rw := httptest.NewRecorder()
// Pass req through
// engine handler.
e.ServeHTTP(rw, r)
// Get http result.
res := rw.Result()
// It should have been stopped
// by middleware and NOT used
// the expected test handler.
ok := usedTestHandler(res)
assert.False(t, ok)
// Read entire response body.
b, err := io.ReadAll(res.Body)
if err != nil {
panic(err)
}
var challenge string
var difficulty uint64
// Parse output body and find the challenge / difficulty.
for _, line := range strings.Split(string(b), "\n") {
line = strings.TrimSpace(line)
switch {
case strings.HasPrefix(line, "data-nollamas-challenge=\""):
line = line[25:]
line = line[:len(line)-1]
challenge = line
case strings.HasPrefix(line, "data-nollamas-difficulty=\""):
line = line[26:]
line = line[:len(line)-1]
var err error
difficulty, err = strconv.ParseUint(line, 10, 8)
assert.NoError(t, err)
}
}
// Ensure valid posed challenge.
assert.NotZero(t, difficulty)
assert.NotEmpty(t, challenge)
// Prepare a test request for gin engine.
r = httptest.NewRequest("GET", "/", nil)
r.Header.Set("User-Agent", userAgent)
rw = httptest.NewRecorder()
// Now compute and set solution query paramater.
solution := computeSolution(challenge, difficulty)
r.URL.RawQuery = "nollamas_solution=" + solution
t.Logf("challenge=%s", challenge)
t.Logf("difficulty=%d", difficulty)
t.Logf("solution=%s", solution)
// Pass req through
// engine handler.
e.ServeHTTP(rw, r)
// Get http result.
res = rw.Result()
// Should have received redirect.
uri, err := res.Location()
assert.NoError(t, err)
assert.Equal(t, uri.String(), "/")
// Ensure our expected solution cookie (to bypass challenge) was set.
ok = slices.ContainsFunc(res.Cookies(), func(c *http.Cookie) bool {
return c.Name == "gts-nollamas"
})
assert.True(t, ok)
}
// computeSolution does the functional equivalent of our nollamas workerTask.js.
func computeSolution(challenge string, diff uint64) string {
outer:
for i := 0; ; i++ {
solution := strconv.Itoa(i)
combined := challenge + solution
hash := sha256.Sum256(byteutil.S2B(combined))
encoded := hex.EncodeToString(hash[:])
for i := range diff {
if encoded[i] != '0' {
continue outer
}
}
return solution
}
}
// usedTestHandler returns whether testHandler() was used.
func usedTestHandler(res *http.Response) bool {
return res.Header.Get("test-handler") == "ok"
}
func testHandler(c *gin.Context) {
c.Writer.Header().Set("test-handler", "ok")
c.Writer.WriteHeader(http.StatusOK)
}
func getInstanceV1(context.Context) (*model.InstanceV1, gtserror.WithCode) {
return &model.InstanceV1{}, nil
}
|
