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*(querylog): decode methods to a new file
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,175 @@ | ||
package querylog | ||
|
||
import ( | ||
"encoding/base64" | ||
"strconv" | ||
"strings" | ||
"time" | ||
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"github.com/AdguardTeam/AdGuardHome/dnsfilter" | ||
"github.com/AdguardTeam/golibs/log" | ||
"github.com/miekg/dns" | ||
) | ||
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// decodeLogEntry - decodes query log entry from a line | ||
// nolint (gocyclo) | ||
func decodeLogEntry(ent *logEntry, str string) { | ||
var b bool | ||
var i int | ||
var err error | ||
for { | ||
k, v, t := readJSON(&str) | ||
if t == jsonTErr { | ||
break | ||
} | ||
switch k { | ||
case "IP": | ||
if len(ent.IP) == 0 { | ||
ent.IP = v | ||
} | ||
case "T": | ||
ent.Time, err = time.Parse(time.RFC3339, v) | ||
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case "QH": | ||
ent.QHost = v | ||
case "QT": | ||
ent.QType = v | ||
case "QC": | ||
ent.QClass = v | ||
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case "Answer": | ||
ent.Answer, err = base64.StdEncoding.DecodeString(v) | ||
case "OrigAnswer": | ||
ent.OrigAnswer, err = base64.StdEncoding.DecodeString(v) | ||
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case "IsFiltered": | ||
b, err = strconv.ParseBool(v) | ||
ent.Result.IsFiltered = b | ||
case "Rule": | ||
ent.Result.Rule = v | ||
case "FilterID": | ||
i, err = strconv.Atoi(v) | ||
ent.Result.FilterID = int64(i) | ||
case "Reason": | ||
i, err = strconv.Atoi(v) | ||
ent.Result.Reason = dnsfilter.Reason(i) | ||
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case "Upstream": | ||
ent.Upstream = v | ||
case "Elapsed": | ||
i, err = strconv.Atoi(v) | ||
ent.Elapsed = time.Duration(i) | ||
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// pre-v0.99.3 compatibility: | ||
case "Question": | ||
var qstr []byte | ||
qstr, err = base64.StdEncoding.DecodeString(v) | ||
if err != nil { | ||
break | ||
} | ||
q := new(dns.Msg) | ||
err = q.Unpack(qstr) | ||
if err != nil { | ||
break | ||
} | ||
ent.QHost = q.Question[0].Name | ||
if len(ent.QHost) == 0 { | ||
break | ||
} | ||
ent.QHost = ent.QHost[:len(ent.QHost)-1] | ||
ent.QType = dns.TypeToString[q.Question[0].Qtype] | ||
ent.QClass = dns.ClassToString[q.Question[0].Qclass] | ||
case "Time": | ||
ent.Time, err = time.Parse(time.RFC3339, v) | ||
} | ||
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if err != nil { | ||
log.Debug("decodeLogEntry err: %s", err) | ||
break | ||
} | ||
} | ||
} | ||
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// Get value from "key":"value" | ||
func readJSONValue(s, name string) string { | ||
i := strings.Index(s, "\""+name+"\":\"") | ||
if i == -1 { | ||
return "" | ||
} | ||
start := i + 1 + len(name) + 3 | ||
i = strings.IndexByte(s[start:], '"') | ||
if i == -1 { | ||
return "" | ||
} | ||
end := start + i | ||
return s[start:end] | ||
} | ||
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const ( | ||
jsonTErr = iota | ||
jsonTObj | ||
jsonTStr | ||
jsonTNum | ||
jsonTBool | ||
) | ||
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// Parse JSON key-value pair | ||
// e.g.: "key":VALUE where VALUE is "string", true|false (boolean), or 123.456 (number) | ||
// Note the limitations: | ||
// . doesn't support whitespace | ||
// . doesn't support "null" | ||
// . doesn't validate boolean or number | ||
// . no proper handling of {} braces | ||
// . no handling of [] brackets | ||
// Return (key, value, type) | ||
func readJSON(ps *string) (string, string, int32) { | ||
s := *ps | ||
k := "" | ||
v := "" | ||
t := int32(jsonTErr) | ||
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q1 := strings.IndexByte(s, '"') | ||
if q1 == -1 { | ||
return k, v, t | ||
} | ||
q2 := strings.IndexByte(s[q1+1:], '"') | ||
if q2 == -1 { | ||
return k, v, t | ||
} | ||
k = s[q1+1 : q1+1+q2] | ||
s = s[q1+1+q2+1:] | ||
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if len(s) < 2 || s[0] != ':' { | ||
return k, v, t | ||
} | ||
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if s[1] == '"' { | ||
q2 = strings.IndexByte(s[2:], '"') | ||
if q2 == -1 { | ||
return k, v, t | ||
} | ||
v = s[2 : 2+q2] | ||
t = jsonTStr | ||
s = s[2+q2+1:] | ||
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} else if s[1] == '{' { | ||
t = jsonTObj | ||
s = s[1+1:] | ||
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} else { | ||
sep := strings.IndexAny(s[1:], ",}") | ||
if sep == -1 { | ||
return k, v, t | ||
} | ||
v = s[1 : 1+sep] | ||
if s[1] == 't' || s[1] == 'f' { | ||
t = jsonTBool | ||
} else if s[1] == '.' || (s[1] >= '0' && s[1] <= '9') { | ||
t = jsonTNum | ||
} | ||
s = s[1+sep+1:] | ||
} | ||
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*ps = s | ||
return k, v, t | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,34 @@ | ||
package querylog | ||
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import ( | ||
"testing" | ||
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"github.com/stretchr/testify/assert" | ||
) | ||
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func TestJSON(t *testing.T) { | ||
s := ` | ||
{"keystr":"val","obj":{"keybool":true,"keyint":123456}} | ||
` | ||
k, v, jtype := readJSON(&s) | ||
assert.Equal(t, jtype, int32(jsonTStr)) | ||
assert.Equal(t, "keystr", k) | ||
assert.Equal(t, "val", v) | ||
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k, v, jtype = readJSON(&s) | ||
assert.Equal(t, jtype, int32(jsonTObj)) | ||
assert.Equal(t, "obj", k) | ||
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k, v, jtype = readJSON(&s) | ||
assert.Equal(t, jtype, int32(jsonTBool)) | ||
assert.Equal(t, "keybool", k) | ||
assert.Equal(t, "true", v) | ||
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k, v, jtype = readJSON(&s) | ||
assert.Equal(t, jtype, int32(jsonTNum)) | ||
assert.Equal(t, "keyint", k) | ||
assert.Equal(t, "123456", v) | ||
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k, v, jtype = readJSON(&s) | ||
assert.True(t, jtype == jsonTErr) | ||
} |
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