Add core packages, configuration system, and initial application structure

This commit is contained in:
2025-08-21 11:04:03 +01:00
parent b8db587d7b
commit ecaf52b98f
18 changed files with 12889 additions and 0 deletions

127
pkg/encoders/text/escape.go Normal file
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package text
// NostrEscape for JSON encoding according to RFC8259.
//
// This is the efficient implementation based on the NIP-01 specification:
//
// To prevent implementation differences from creating a different event ID for
// the same event, the following rules MUST be followed while serializing:
//
// No whitespace, line breaks or other unnecessary formatting should be included
// in the output JSON. No characters except the following should be escaped, and
// instead should be included verbatim:
//
// - A line break, 0x0A, as \n
// - A double quote, 0x22, as \"
// - A backslash, 0x5C, as \\
// - A carriage return, 0x0D, as \r
// - A tab character, 0x09, as \t
// - A backspace, 0x08, as \b
// - A form feed, 0x0C, as \f
//
// UTF-8 should be used for encoding.
func NostrEscape(dst, src []byte) []byte {
l := len(src)
for i := 0; i < l; i++ {
c := src[i]
switch {
case c == '"':
dst = append(dst, '\\', '"')
case c == '\\':
// if i+1 < l && src[i+1] == 'u' || i+1 < l && src[i+1] == '/' {
if i+1 < l && src[i+1] == 'u' {
dst = append(dst, '\\')
} else {
dst = append(dst, '\\', '\\')
}
case c == '\b':
dst = append(dst, '\\', 'b')
case c == '\t':
dst = append(dst, '\\', 't')
case c == '\n':
dst = append(dst, '\\', 'n')
case c == '\f':
dst = append(dst, '\\', 'f')
case c == '\r':
dst = append(dst, '\\', 'r')
default:
dst = append(dst, c)
}
}
return dst
}
// NostrUnescape reverses the operation of NostrEscape except instead of
// appending it to the provided slice, it rewrites it, eliminating a memory
// copy. Keep in mind that the original JSON will be mangled by this operation,
// but the resultant slices will cost zero allocations.
func NostrUnescape(dst []byte) (b []byte) {
var r, w int
for ; r < len(dst); r++ {
if dst[r] == '\\' {
r++
c := dst[r]
switch {
// nip-01 specifies the following single letter C-style escapes for control
// codes under 0x20.
//
// no others are specified but must be preserved, so only these can be
// safely decoded at runtime as they must be re-encoded when marshalled.
case c == '"':
dst[w] = '"'
w++
case c == '\\':
dst[w] = '\\'
w++
case c == 'b':
dst[w] = '\b'
w++
case c == 't':
dst[w] = '\t'
w++
case c == 'n':
dst[w] = '\n'
w++
case c == 'f':
dst[w] = '\f'
w++
case c == 'r':
dst[w] = '\r'
w++
// special cases for non-nip-01 specified json escapes (must be preserved for ID
// generation).
case c == 'u':
dst[w] = '\\'
w++
dst[w] = 'u'
w++
case c == '/':
dst[w] = '\\'
w++
dst[w] = '/'
w++
// special case for octal escapes (must be preserved for ID generation).
case c >= '0' && c <= '9':
dst[w] = '\\'
w++
dst[w] = c
w++
// anything else after a reverse solidus just preserve it.
default:
dst[w] = dst[r]
w++
dst[w] = c
w++
}
} else {
dst[w] = dst[r]
w++
}
}
b = dst[:w]
return
}

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package text
import (
"testing"
"lol.mleku.dev/chk"
"next.orly.dev/pkg/crypto/sha256"
"lukechampine.com/frand"
)
func TestUnescapeByteString(t *testing.T) {
b := make([]byte, 256)
for i := range b {
b[i] = byte(i)
}
escaped := NostrEscape(nil, b)
unescaped := NostrUnescape(escaped)
if string(b) != string(unescaped) {
t.Log(b)
t.Log(unescaped)
t.FailNow()
}
}
func GenRandString(l int, src *frand.RNG) (str []byte) {
return src.Bytes(l)
}
var seed = sha256.Sum256(
[]byte(`
The tao that can be told
is not the eternal Tao
The name that can be named
is not the eternal Name
The unnamable is the eternally real
Naming is the origin of all particular things
Free from desire, you realize the mystery
Caught in desire, you see only the manifestations
Yet mystery and manifestations arise from the same source
This source is called darkness
Darkness within darkness
The gateway to all understanding
`),
)
var src = frand.NewCustom(seed[:], 32, 12)
func TestRandomEscapeByteString(t *testing.T) {
// this is a kind of fuzz test, does a massive number of iterations of
// random content that ensures the escaping is correct without creating a
// fixed set of test vectors.
for i := 0; i < 1000; i++ {
l := src.Intn(1<<8) + 32
s1 := GenRandString(l, src)
s2 := make([]byte, l)
orig := make([]byte, l)
copy(s2, s1)
copy(orig, s1)
// first we are checking our implementation comports to the one from go-nostr.
escapeStringVersion := NostrEscape([]byte{}, s1)
escapeJSONStringAndWrapVersion := NostrEscape(nil, s2)
if len(escapeJSONStringAndWrapVersion) != len(escapeStringVersion) {
t.Logf(
"escapeString\nlength: %d\n%s\n%v\n",
len(escapeStringVersion), string(escapeStringVersion),
escapeStringVersion,
)
t.Logf(
"escapJSONStringAndWrap\nlength: %d\n%s\n%v\n",
len(escapeJSONStringAndWrapVersion),
escapeJSONStringAndWrapVersion,
escapeJSONStringAndWrapVersion,
)
t.FailNow()
}
for i := range escapeStringVersion {
if i > len(escapeJSONStringAndWrapVersion) {
t.Fatal("escapeString version is shorter")
}
if escapeStringVersion[i] != escapeJSONStringAndWrapVersion[i] {
t.Logf(
"escapeString version differs at index %d from "+
"escapeJSONStringAndWrap version\n%s\n%s\n%v\n%v", i,
escapeStringVersion[i-4:],
escapeJSONStringAndWrapVersion[i-4:],
escapeStringVersion[i-4:],
escapeJSONStringAndWrapVersion[i-4:],
)
t.Logf(
"escapeString\nlength: %d %s\n",
len(escapeStringVersion), escapeStringVersion,
)
t.Logf(
"escapJSONStringAndWrap\nlength: %d %s\n",
len(escapeJSONStringAndWrapVersion),
escapeJSONStringAndWrapVersion,
)
t.Logf(
"got '%s' %d expected '%s' %d\n",
string(escapeJSONStringAndWrapVersion[i]),
escapeJSONStringAndWrapVersion[i],
string(escapeStringVersion[i]),
escapeStringVersion[i],
)
t.FailNow()
}
}
// next, unescape the output and see if it matches the original
unescaped := NostrUnescape(escapeJSONStringAndWrapVersion)
// t.Logf("unescaped: \n%s\noriginal: \n%s", unescaped, orig)
if string(unescaped) != string(orig) {
t.Fatalf(
"\ngot %d %v\nexpected %d %v\n",
len(unescaped),
unescaped,
len(orig),
orig,
)
}
}
}
func BenchmarkNostrEscapeNostrUnescape(b *testing.B) {
const size = 65536
b.Run(
"frand64k", func(b *testing.B) {
b.ReportAllocs()
in := make([]byte, size)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
}
},
)
b.Run(
"NostrEscape64k", func(b *testing.B) {
b.ReportAllocs()
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
out = out[:0]
}
},
)
b.Run(
"NostrEscapeNostrUnescape64k", func(b *testing.B) {
b.ReportAllocs()
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
in = in[:0]
out = NostrUnescape(out)
out = out[:0]
}
},
)
b.Run(
"frand32k", func(b *testing.B) {
b.ReportAllocs()
size := size / 2
in := make([]byte, size)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
}
},
)
b.Run(
"NostrEscape32k", func(b *testing.B) {
b.ReportAllocs()
size := size / 2
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
out = out[:0]
}
},
)
b.Run(
"NostrEscapeNostrUnescape32k", func(b *testing.B) {
b.ReportAllocs()
size := size / 2
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
in = in[:0]
out = NostrUnescape(out)
out = out[:0]
}
},
)
b.Run(
"frand16k", func(b *testing.B) {
b.ReportAllocs()
size := size / 4
in := make([]byte, size)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
}
},
)
b.Run(
"NostrEscape16k", func(b *testing.B) {
b.ReportAllocs()
size := size / 4
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
out = out[:0]
}
},
)
b.Run(
"NostrEscapeNostrUnescape16k", func(b *testing.B) {
b.ReportAllocs()
size := size / 4
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
in = in[:0]
out = NostrUnescape(out)
out = out[:0]
}
},
)
b.Run(
"frand8k", func(b *testing.B) {
b.ReportAllocs()
size := size / 8
in := make([]byte, size)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
}
},
)
b.Run(
"NostrEscape8k", func(b *testing.B) {
b.ReportAllocs()
size := size / 8
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
out = out[:0]
}
},
)
b.Run(
"NostrEscapeNostrUnescape8k", func(b *testing.B) {
b.ReportAllocs()
size := size / 8
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
in = in[:0]
out = NostrUnescape(out)
out = out[:0]
}
},
)
b.Run(
"frand4k", func(b *testing.B) {
b.ReportAllocs()
size := size / 16
in := make([]byte, size)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
}
},
)
b.Run(
"NostrEscape4k", func(b *testing.B) {
b.ReportAllocs()
size := size / 16
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
out = out[:0]
}
},
)
b.Run(
"NostrEscapeNostrUnescape4k", func(b *testing.B) {
b.ReportAllocs()
size := size / 16
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
in = in[:0]
out = NostrUnescape(out)
out = out[:0]
}
},
)
b.Run(
"frand2k", func(b *testing.B) {
b.ReportAllocs()
size := size / 32
in := make([]byte, size)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
}
},
)
b.Run(
"NostrEscape2k", func(b *testing.B) {
b.ReportAllocs()
size := size / 32
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
out = out[:0]
}
},
)
b.Run(
"NostrEscapeNostrUnescape2k", func(b *testing.B) {
b.ReportAllocs()
size := size / 32
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
in = in[:0]
out = NostrUnescape(out)
out = out[:0]
}
},
)
b.Run(
"frand1k", func(b *testing.B) {
b.ReportAllocs()
size := size / 64
in := make([]byte, size)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
}
},
)
b.Run(
"NostrEscape1k", func(b *testing.B) {
b.ReportAllocs()
size := size / 64
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
out = out[:0]
}
},
)
b.Run(
"NostrEscapeNostrUnescape1k", func(b *testing.B) {
b.ReportAllocs()
size := size / 64
in := make([]byte, size)
out := make([]byte, size*2)
var err error
for i := 0; i < b.N; i++ {
if _, err = frand.Read(in); chk.E(err) {
b.Fatal(err)
}
out = NostrEscape(out, in)
in = in[:0]
out = NostrUnescape(out)
out = out[:0]
}
},
)
}