func presentQRCode(pl meddler.Payload, res http.ResponseWriter, req *http.Request) {
foundKeySet, err := lookUpKeySet(pl.PublicKey)
if err != nil {
http.Error(res, fmt.Sprintf("encountered error: %v", err), 400)
return
}
if foundKeySet == nil {
panic("null keySet returned from publicKeyLookup")
}
rawTextForSigning := pl.RawTextForSigning()
if !foundKeySet.Match([]byte(rawTextForSigning), []byte(pl.Signature)) {
http.Error(res, "invalid signature", 403)
return
}
curTimeUnix := time.Now().Unix()
if pl.ExpiryTime < curTimeUnix {
http.Error(res, fmt.Sprintf("request expired at %q, current time %q", pl.ExpiryTime, curTimeUnix), 403)
return
}
uri := pl.URI
code, err := qr.Encode(uri, qr.Q)
if err != nil {
fmt.Fprintf(res, "%s %v\n", uri, err)
return
}
pngImage := code.PNG()
fmt.Fprintf(res, "%s", pngImage)
}
func presentQRCode(pl meddler.Payload, res http.ResponseWriter, req *http.Request) {
if pl.PublicKey != envKeySet.PublicKey {
http.Error(res, "invalid publickey", 405)
return
}
rawTextForSigning := pl.RawTextForSigning()
if !envKeySet.Match([]byte(rawTextForSigning), []byte(pl.Signature)) {
http.Error(res, "invalid signature", 403)
return
}
curTimeUnix := time.Now().Unix()
if pl.ExpiryTime < curTimeUnix {
http.Error(res, fmt.Sprintf("request expired at %q, current time %q", pl.ExpiryTime, curTimeUnix), 403)
return
}
uri := pl.URI
code, err := qr.Encode(uri, qr.Q)
if err != nil {
fmt.Fprintf(res, "%s %v\n", uri, err)
return
}
pngImage := code.PNG()
fmt.Fprintf(res, "%s", pngImage)
}
func (g *Commands) QR(byId bool) error {
kvChan := g.urler(byId, g.opts.Sources)
address := DefaultQRShareServer
if g.opts.Meta != nil {
meta := *(g.opts.Meta)
if retrAddress, ok := meta[AddressKey]; ok && len(retrAddress) >= 1 {
address = retrAddress[0]
}
}
address = strings.TrimRight(address, "/")
if envKeySet.PublicKey == "" {
envKeySet.PublicKey = "5160897b3586461e83e7279c10352ac4"
}
if envKeySet.PrivateKey == "" {
envKeySet.PrivateKey = "5a3451dadab74f75b16f754c0a931949"
}
for kv := range kvChan {
switch kv.value.(type) {
case error:
g.log.LogErrf("%s: %s\n", kv.key, kv.value)
continue
}
fileURI, ok := kv.value.(string)
if !ok {
continue
}
curTime := time.Now()
pl := meddler.Payload{
URI: fileURI,
RequestTime: curTime.Unix(),
Payload: fmt.Sprintf("%v%v", rand.Float64(), curTime),
PublicKey: envKeySet.PublicKey,
ExpiryTime: curTime.Add(time.Hour).Unix(),
}
plainTextToSign := pl.RawTextForSigning()
pl.Signature = fmt.Sprintf("%s", envKeySet.Sign([]byte(plainTextToSign)))
uv := pl.ToUrlValues()
encodedValues := uv.Encode()
fullUrl := fmt.Sprintf("%s/qr?%s", address, encodedValues)
if g.opts.Verbose {
g.log.Logf("%q => %q\n", kv.key, fullUrl)
}
if err := open.Start(fullUrl); err != nil {
g.log.Logf("qr: err %v %q\n", err, fullUrl)
}
}
return nil
}