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284061eee7
Add a full test server impl in this new package + tests. Move dnsrecorder into this package as well and finish up the commented out tests that were left in the old dnsrecorder package. Update all callers and tests.
55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
// Package dnstest allows for easy testing of DNS client against a test server.
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package dnstest
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import (
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"time"
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"github.com/miekg/dns"
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)
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// Recorder is a type of ResponseWriter that captures
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// the rcode code written to it and also the size of the message
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// written in the response. A rcode code does not have
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// to be written, however, in which case 0 must be assumed.
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// It is best to have the constructor initialize this type
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// with that default status code.
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type Recorder struct {
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dns.ResponseWriter
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Rcode int
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Len int
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Msg *dns.Msg
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Start time.Time
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}
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// New makes and returns a new Recorder,
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// which captures the DNS rcode from the ResponseWriter
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// and also the length of the response message written through it.
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func NewRecorder(w dns.ResponseWriter) *Recorder {
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return &Recorder{
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ResponseWriter: w,
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Rcode: 0,
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Msg: nil,
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Start: time.Now(),
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}
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}
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// WriteMsg records the status code and calls the
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// underlying ResponseWriter's WriteMsg method.
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func (r *Recorder) WriteMsg(res *dns.Msg) error {
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r.Rcode = res.Rcode
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// We may get called multiple times (axfr for instance).
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// Save the last message, but add the sizes.
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r.Len += res.Len()
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r.Msg = res
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return r.ResponseWriter.WriteMsg(res)
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}
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// Write is a wrapper that records the length of the message that gets written.
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func (r *Recorder) Write(buf []byte) (int, error) {
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n, err := r.ResponseWriter.Write(buf)
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if err == nil {
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r.Len += n
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}
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return n, err
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}
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