// 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" "fmt" "html/template" "log" "net/http" "regexp" "strings" "github.com/davecgh/go-spew/spew" "github.com/stapelberg/qrbill" ) var ( fieldNameRe = regexp.MustCompile(`
( )*([^:]+):`) stringLiteralRe = regexp.MustCompile(`"([^"]*)"`) parenRe = regexp.MustCompile(`\(([^)]+)\) `) ) var tmpl = template.Must(template.New("").Parse(` QR Bill HTML Debug Page

URL parameters

Parameter Value
&criban= {{ .Criban }}
&crname= {{ .Crname }}
&craddr1= {{ .Craddr1 }}
&craddr2= {{ .Craddr2 }}
&crpost= {{ .Crpost }}
&crcity= {{ .Crcity }}
&crcountry= {{ .Crcountry }}
&udname= {{ .Udname }}
&udaddr1= {{ .Udaddr1 }}
&udaddr2= {{ .Udaddr2 }}
&udpost= {{ .Udpost }}
&udcity= {{ .Udcity }}
&udcountry= {{ .Udcountry }}
&amount= {{ .Amount }}
&message= {{ .Message }}
&udaddrtype= {{ .Udaddrtype }}
`)) func debugHTML(w http.ResponseWriter, r *http.Request, prefix string, qrch *qrbill.QRCH) { w.Header().Add("Content-Type", "text/html; charset=utf-8") var buf bytes.Buffer err := tmpl.Execute(&buf, struct { Criban string Crname string Craddr1 string Craddr2 string Crpost string Crcity string Crcountry string Udname string Udaddr1 string Udaddr2 string Udpost string Udcity string Udcountry string Udaddrtype string Message string Amount string }{ Criban: r.FormValue("criban"), Crname: r.FormValue("crname"), Craddr1: r.FormValue("craddr1"), Craddr2: r.FormValue("craddr2"), Crpost: r.FormValue("crpost"), Crcity: r.FormValue("crcity"), Crcountry: r.FormValue("crcountry"), Udname: r.FormValue("udname"), Udaddr1: r.FormValue("udaddr1"), Udaddr2: r.FormValue("udaddr2"), Udpost: r.FormValue("udpost"), Udcity: r.FormValue("udcity"), Udcountry: r.FormValue("udcountry"), Udaddrtype: r.FormValue("udaddrtype"), Message: r.FormValue("message"), Amount: r.FormValue("amount"), }) if err != nil { log.Printf("%s %s", prefix, err) http.Error(w, err.Error(), http.StatusInternalServerError) return } fmt.Fprintf(w, "%s", buf.String()) spew := func(vars ...interface{}) string { sp := spew.Sdump(vars...) sp = strings.ReplaceAll(sp, "\n", "
") sp = strings.ReplaceAll(sp, " ", " ") sp = parenRe.ReplaceAllString(sp, "") sp = stringLiteralRe.ReplaceAllStringFunc(sp, func(stringLiteral string) string { return `` + stringLiteral + "" }) sp = fieldNameRe.ReplaceAllStringFunc(sp, func(fieldName string) string { return `` + fieldName + "" }) return sp } fmt.Fprintf(w, `

input

%s
`, spew(qrch)) fmt.Fprintf(w, `

validated

%s
`, spew(qrch.Validate())) r.URL.Path = "/qr" v := r.URL.Query() v.Set("format", "png") r.URL.RawQuery = v.Encode() fmt.Fprintf(w, `

QR Bill

`, r.URL.String()) }