writefreely/monetization.go

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/*
* Copyright © 2020-2021 Musing Studio LLC.
*
* This file is part of WriteFreely.
*
* WriteFreely is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, included
* in the LICENSE file in this source code package.
*/
package writefreely
import (
"bytes"
"fmt"
"github.com/gorilla/mux"
"github.com/writeas/impart"
"github.com/writeas/web-core/log"
"io/ioutil"
"net/http"
"net/url"
"os"
"strings"
)
func displayMonetization(monetization, alias string) string {
if monetization == "" {
return ""
}
ptrURL, err := url.Parse(strings.Replace(monetization, "$", "https://", 1))
if err == nil {
if strings.HasSuffix(ptrURL.Host, ".xrptipbot.com") {
// xrp tip bot doesn't support stream receipts, so return plain pointer
return monetization
}
}
u := os.Getenv("PAYMENT_HOST")
if u == "" {
return "$webmonetization.org/api/receipts/" + url.PathEscape(monetization)
}
u += "/" + alias
return u
}
func handleSPSPEndpoint(app *App, w http.ResponseWriter, r *http.Request) error {
idStr := r.FormValue("id")
id, err := url.QueryUnescape(idStr)
if err != nil {
log.Error("Unable to unescape: %s", err)
return err
}
var c *Collection
if strings.IndexRune(id, '.') > 0 && app.cfg.App.SingleUser {
c, err = app.db.GetCollectionByID(1)
} else {
c, err = app.db.GetCollection(id)
}
if err != nil {
return err
}
pointer := c.Monetization
if pointer == "" {
err := impart.HTTPError{http.StatusNotFound, "No monetization pointer."}
return err
}
fmt.Fprintf(w, pointer)
return nil
}
func handleGetSplitContent(app *App, w http.ResponseWriter, r *http.Request) error {
var collID int64
var collLookupID string
var coll *Collection
var err error
vars := mux.Vars(r)
if collAlias := vars["alias"]; collAlias != "" {
// Fetch collection information, since an alias is provided
coll, err = app.db.GetCollection(collAlias)
if err != nil {
return err
}
collID = coll.ID
collLookupID = coll.Alias
}
p, err := app.db.GetPost(vars["post"], collID)
if err != nil {
return err
}
receipt := r.FormValue("receipt")
if receipt == "" {
return impart.HTTPError{http.StatusBadRequest, "No `receipt` given."}
}
err = verifyReceipt(receipt, collLookupID)
if err != nil {
return err
}
d := struct {
Content string `json:"body"`
HTMLContent string `json:"html_body"`
}{}
if exc := strings.Index(p.Content, shortCodePaid); exc > -1 {
baseURL := ""
if coll != nil {
baseURL = coll.CanonicalURL()
}
d.Content = p.Content[exc+len(shortCodePaid):]
d.HTMLContent = applyMarkdown([]byte(d.Content), baseURL, app.cfg)
}
return impart.WriteSuccess(w, d, http.StatusOK)
}
func verifyReceipt(receipt, id string) error {
receiptsHost := os.Getenv("RECEIPTS_HOST")
if receiptsHost == "" {
receiptsHost = "https://webmonetization.org/api/receipts/verify?id=" + id
} else {
receiptsHost = fmt.Sprintf("%s/receipts?id=%s", receiptsHost, id)
}
log.Info("Verifying receipt %s at %s", receipt, receiptsHost)
r, err := http.NewRequest("POST", receiptsHost, bytes.NewBufferString(receipt))
if err != nil {
log.Error("Unable to create new request to %s: %s", receiptsHost, err)
return err
}
resp, err := http.DefaultClient.Do(r)
if err != nil {
log.Error("Unable to Do() request to %s: %s", receiptsHost, err)
return err
}
if resp != nil && resp.Body != nil {
defer resp.Body.Close()
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Error("Unable to read %s response body: %s", receiptsHost, err)
return err
}
log.Info("Status : %s", resp.Status)
log.Info("Response: %s", body)
if resp.StatusCode != http.StatusOK {
log.Error("Bad response from %s:\nStatus: %d\n%s", receiptsHost, resp.StatusCode, string(body))
return impart.HTTPError{resp.StatusCode, string(body)}
}
return nil
}