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loggertext.go
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loggertext.go
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// Package traefiklogger a Traefik HTTP logger plugin.
package traefiklogger
import (
"fmt"
"log"
"net/http"
"sort"
"strings"
)
// TextualHTTPLogger a textual logger implementation.
type TextualHTTPLogger struct {
logger *log.Logger
writer LogWriter
}
func (thl *TextualHTTPLogger) print(record *LogRecord) {
var builder strings.Builder
builder.WriteString(fmt.Sprintf("%s %s %s: %d %s %s\n",
record.RemoteAddr, record.Method, record.URL,
record.StatusCode, http.StatusText(record.StatusCode), record.Proto,
))
if len(record.RequestHeaders) > 0 {
builder.WriteString("\nRequest Headers:\n")
writeHeaders(&builder, record.RequestHeaders)
}
if record.RequestBody.Len() > 0 {
requestBodyText, _ := record.BodyDecoder.decode(record.RequestBody)
builder.WriteString("\nRequest Body:\n")
builder.WriteString(requestBodyText)
builder.WriteString("\n")
}
if len(record.ResponseHeaders) > 0 {
builder.WriteString("\nResponse Headers:\n")
writeHeaders(&builder, record.ResponseHeaders)
}
builder.WriteString(fmt.Sprintf("\nResponse Content Length: %d\n", record.ResponseContentLength))
builder.WriteString(fmt.Sprintf("\nDuration: %.3f ms\n", record.DurationMs))
if record.ResponseBody.Len() > 0 {
responseBodyText, _ := record.BodyDecoder.decode(record.ResponseBody)
builder.WriteString("\nResponse Body:\n")
builder.WriteString(responseBodyText)
builder.WriteString("\n")
}
builder.WriteString("\n")
err := thl.writer.Write(builder.String())
if err != nil {
thl.logger.Println("Failed to write:", err)
return
}
}
func writeHeaders(builder *strings.Builder, header http.Header) {
keys := make([]string, 0, len(header))
for key := range header {
keys = append(keys, key)
}
sort.Strings(keys)
for _, key := range keys {
builder.WriteString(fmt.Sprintf("%s: %s\n", key, strings.Join(header[key], ",")))
}
}