eb600760a3
The Swiss banking app neon does not accept the exclamation point. Users need to remove it before they can enter the transaction. Hence, remove it for compatibility, perhaps other banks or banking apps are also affected.
280 lines
7.1 KiB
Go
280 lines
7.1 KiB
Go
// Copyright 2020 Google LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"flag"
|
|
"fmt"
|
|
"image/png"
|
|
"io"
|
|
"log"
|
|
"net/http"
|
|
"net/http/httptest"
|
|
"net/url"
|
|
"os"
|
|
"strings"
|
|
|
|
"github.com/davecgh/go-spew/spew"
|
|
"github.com/mattn/go-isatty"
|
|
"github.com/stapelberg/qrbill"
|
|
|
|
_ "net/http/pprof"
|
|
)
|
|
|
|
func ifEmpty(form url.Values, key, alternative string) string {
|
|
if len(form[key]) == 0 {
|
|
return alternative
|
|
}
|
|
return form[key][0]
|
|
}
|
|
|
|
func qrchFromRequest(r *http.Request) *qrbill.QRCH {
|
|
return &qrbill.QRCH{
|
|
CdtrInf: qrbill.QRCHCdtrInf{
|
|
IBAN: ifEmpty(r.Form, "criban", "CH0209000000870913543"),
|
|
Cdtr: qrbill.Address{
|
|
AdrTp: qrbill.AddressType(ifEmpty(r.Form, "craddrtype", string(qrbill.AddressTypeStructured))),
|
|
Name: ifEmpty(r.Form, "crname", "Legalize it"),
|
|
StrtNmOrAdrLine1: ifEmpty(r.Form, "craddr1", "Quellenstrasse"),
|
|
BldgNbOrAdrLine2: ifEmpty(r.Form, "craddr2", "25"),
|
|
PstCd: ifEmpty(r.Form, "crpost", "8005"),
|
|
TwnNm: ifEmpty(r.Form, "crcity", "Zürich"),
|
|
Ctry: ifEmpty(r.Form, "crcountry", "CH"),
|
|
},
|
|
},
|
|
CcyAmt: qrbill.QRCHCcyAmt{
|
|
Amt: ifEmpty(r.Form, "amount", ""),
|
|
Ccy: "CHF",
|
|
},
|
|
UltmtDbtr: qrbill.Address{
|
|
AdrTp: qrbill.AddressType(ifEmpty(r.Form, "udaddrtype", string(qrbill.AddressTypeCombined))),
|
|
Name: ifEmpty(r.Form, "udname", "Michael Stapelberg"),
|
|
StrtNmOrAdrLine1: ifEmpty(r.Form, "udaddr1", "Stauffacherstr 42"),
|
|
BldgNbOrAdrLine2: ifEmpty(r.Form, "udaddr2", "8004 Zürich"),
|
|
PstCd: ifEmpty(r.Form, "udpost", ""),
|
|
TwnNm: ifEmpty(r.Form, "udcity", ""),
|
|
Ctry: ifEmpty(r.Form, "udcountry", "CH"),
|
|
},
|
|
RmtInf: qrbill.QRCHRmtInf{
|
|
Tp: "NON", // Reference type
|
|
Ref: "", // Reference
|
|
AddInf: qrbill.QRCHRmtInfAddInf{
|
|
Ustrd: ifEmpty(r.Form, "message", "Spende 420"),
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
// Overridden in api_gokrazy.go
|
|
var defaultListenAddress = "localhost:9933"
|
|
|
|
func logic() error {
|
|
var listen = flag.String("listen", defaultListenAddress, "[host]:port to listen on")
|
|
flag.Parse()
|
|
|
|
mux := http.NewServeMux()
|
|
|
|
mux.HandleFunc("/qr", func(w http.ResponseWriter, r *http.Request) {
|
|
prefix := "[" + r.RemoteAddr + "]"
|
|
format := r.FormValue("format")
|
|
log.Printf("%s handling request for %s, format=%s", prefix, r.URL.Path, format)
|
|
defer log.Printf("%s request completed (%s)", prefix, r.URL.Path)
|
|
|
|
if format == "" {
|
|
msg := fmt.Sprintf("no ?format= parameter specified. Try %s",
|
|
"http://"+*listen+"/qr?format=html")
|
|
log.Printf("%s %s", prefix, msg)
|
|
http.Error(w, msg, http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
if format != "png" &&
|
|
format != "svg" &&
|
|
format != "pdf" &&
|
|
format != "txt" &&
|
|
format != "html" &&
|
|
format != "wv" &&
|
|
format != "eps" {
|
|
msg := fmt.Sprintf("format (%q) must be one of png, svg, pdf, eps, txt or html", format)
|
|
log.Printf("%s %s", prefix, msg)
|
|
http.Error(w, msg, http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
if err := r.ParseForm(); err != nil {
|
|
log.Printf("%s %s", prefix, err)
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
qrch := qrchFromRequest(r)
|
|
|
|
bill, err := qrch.Encode()
|
|
if err != nil {
|
|
log.Printf("%s %s", prefix, err)
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
var b []byte
|
|
switch format {
|
|
case "png":
|
|
code, err := bill.EncodeToImage()
|
|
if err != nil {
|
|
log.Printf("%s %s", prefix, err)
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
var buf bytes.Buffer
|
|
if err := png.Encode(&buf, code); err != nil {
|
|
log.Printf("%s %s", prefix, err)
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
b = buf.Bytes()
|
|
w.Header().Add("Content-Type", "image/png")
|
|
|
|
case "svg":
|
|
var err error
|
|
b, err = bill.EncodeToSVG()
|
|
if err != nil {
|
|
log.Printf("%s %s", prefix, err)
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
w.Header().Add("Content-Type", "image/svg+xml")
|
|
|
|
case "pdf":
|
|
var err error
|
|
b, err = bill.EncodeToPDF()
|
|
if err != nil {
|
|
log.Printf("%s %s", prefix, err)
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
w.Header().Add("Content-Type", "application/pdf")
|
|
|
|
case "eps":
|
|
var err error
|
|
b, err = bill.EncodeToEPS()
|
|
if err != nil {
|
|
log.Printf("%s %s", prefix, err)
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
|
|
w.Header().Add("Content-Type", "image/eps")
|
|
w.Header().Add("Content-Disposition", `attachment; filename="qr.eps"`)
|
|
|
|
case "txt":
|
|
w.Header().Add("Content-Type", "text/plain; charset=utf-8")
|
|
spew.Fdump(w, qrch.Validate())
|
|
|
|
case "html":
|
|
debugHTML(w, r, prefix, qrch)
|
|
|
|
case "wv":
|
|
w.Header().Add("Content-Type", "text/html; charset=utf-8")
|
|
|
|
r.URL.Path = "/qr"
|
|
v := r.URL.Query()
|
|
v.Set("format", "png")
|
|
r.URL.RawQuery = v.Encode()
|
|
|
|
fmt.Fprintf(w, `<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<style type="text/css">
|
|
img {
|
|
width: 100vw;
|
|
height: 100vh;
|
|
}
|
|
body {
|
|
margin: 0; padding: 0;
|
|
}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
<img src="%s">
|
|
</body>
|
|
</html>`, r.URL.String())
|
|
|
|
}
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control
|
|
// […] this alone is the only directive you need in preventing cached
|
|
// responses on modern browsers.
|
|
w.Header().Add("Cache-Control", "no-store")
|
|
|
|
if _, err := io.Copy(w, bytes.NewReader(b)); err != nil {
|
|
log.Printf("%s %s", prefix, err)
|
|
return
|
|
}
|
|
})
|
|
|
|
mux.HandleFunc("/robots.txt", func(w http.ResponseWriter, r *http.Request) {
|
|
io.WriteString(w, `User-agent: *
|
|
Disallow: /
|
|
`)
|
|
})
|
|
|
|
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
|
|
if r.URL.Path != "/" {
|
|
http.Error(w, "not found", http.StatusNotFound)
|
|
return
|
|
}
|
|
http.Redirect(w, r, "/qr?format=html", http.StatusFound)
|
|
})
|
|
|
|
if flag.NArg() > 0 {
|
|
srv := httptest.NewServer(mux)
|
|
defer srv.Close()
|
|
for _, arg := range flag.Args() {
|
|
u, err := url.Parse(arg)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
u.Host = strings.TrimPrefix(srv.URL, "http://")
|
|
resp, err := srv.Client().Get(u.String())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
ct := resp.Header.Get("Content-Type")
|
|
if !strings.HasPrefix(ct, "text/") &&
|
|
isatty.IsTerminal(os.Stdout.Fd()) {
|
|
fmt.Fprintf(os.Stderr, "not writing raw image data to terminal, did you forget to redirect the output?\n")
|
|
os.Exit(2)
|
|
}
|
|
if _, err := io.Copy(os.Stdout, resp.Body); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
log.Printf("QR Bill generation URL: http://%s/qr?format=html", *listen)
|
|
return http.ListenAndServe(*listen, mux)
|
|
}
|
|
|
|
func main() {
|
|
if err := logic(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|