yaaa
This commit is contained in:
commit
a6033f5fe6
4 changed files with 354 additions and 0 deletions
103
main.go
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103
main.go
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package main
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import (
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"encoding/json"
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"io"
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"log"
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"net/http"
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"net/http/httputil"
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"net/url"
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"os"
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)
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type TokenResponse struct {
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Error string `json:"error"`
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AccessToken string `json:"access_token"`
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}
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func authorizeRoute(w http.ResponseWriter, r *http.Request) {
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code := r.URL.Query().Get("code")
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if len(code) == 0 {
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w.WriteHeader(http.StatusBadRequest)
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w.Write([]byte(`{"error":"missing code"}`))
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return
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}
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values := make(url.Values)
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values["grant_type"] = []string{"authorization_code"}
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values["client_id"] = []string{os.Getenv("APP_ID")}
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values["client_secret"] = []string{os.Getenv("SECRET_KEY")}
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values["code"] = []string{code}
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values["redirect_uri"] = []string{os.Getenv("REDIRECT_URI")}
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resp, err := http.PostForm("https://api.mercadolibre.com/oauth/token", values)
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if err != nil {
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log.Println(err)
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(`{"error":"ML API error"}`))
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return
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}
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tokenResp := TokenResponse{}
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rawJson, err := io.ReadAll(resp.Body)
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if err != nil {
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log.Println(err)
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(`{"error":"ML API error"}`))
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return
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}
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err = resp.Body.Close()
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if err != nil {
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log.Println(err)
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(`{"error":"ML API error"}`))
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return
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}
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err = json.Unmarshal(rawJson, &tokenResp)
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if err != nil {
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log.Println(err)
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w.WriteHeader(http.StatusInternalServerError)
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w.Write([]byte(`{"error":"ML API error"}`))
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return
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}
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// if len(tokenResp.Error) != 0 {
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// log.Println(string(rawJson))
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// w.WriteHeader(http.StatusInternalServerError)
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// w.Write([]byte(`{"error":"ML API error"}`))
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// return
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// }
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w.Write([]byte(rawJson))
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}
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func proxyRoute(res http.ResponseWriter, req *http.Request) {
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// parse the url
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url, _ := url.Parse("https://api.mercadolibre.com/")
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// create the reverse proxy
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proxy := httputil.NewSingleHostReverseProxy(url)
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// Update the headers to allow for SSL redirection
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req.URL.Host = url.Host
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req.URL.Scheme = url.Scheme
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req.Header.Set("X-Forwarded-Host", "")
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req.Header.Set("X-Forwarded-For", "")
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req.Header.Set("Origin", "")
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req.Header.Set("Referer", "")
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req.Host = url.Host
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// Note that ServeHttp is non blocking and uses a go routine under the hood
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proxy.ServeHTTP(res, req)
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}
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func main() {
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fs := http.FileServer(http.Dir("static"))
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http.Handle("/", fs)
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http.HandleFunc("/authorize", authorizeRoute)
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http.HandleFunc("/pictures/items/upload", proxyRoute)
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http.HandleFunc("/items", proxyRoute)
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log.Fatalln(http.ListenAndServe(":6969", nil))
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}
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5
readme.md
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5
readme.md
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# Odio nombrar cosas y odio a MercadoLibre
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Una forma más rápida de vender libros en MercadoLibre. Lee el ISBN del libro con un escaner de código de barras, lo busca en la API de [openlibrary.org](https://openlibrary.org), consigue los metadatos y de paso te busca los precios. Super beta, proyecto personal, quizás lo mejore.
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Requiere un servidor de API para conseguir el access token sin exponer el client secret y porque MeLi no sabe configurar CORS bien.
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19
static/html5-qrcode.min.js
vendored
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19
static/html5-qrcode.min.js
vendored
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File diff suppressed because one or more lines are too long
227
static/index.html
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227
static/index.html
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<!doctype html>
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<meta charset=utf-8>
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0">
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<style>
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html, body {
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margin: 0;
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}
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#files-preview {
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height: 50vh;
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overflow: scroll;
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border: 1px solid;
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}
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#files-preview img {
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width: 50%;
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}
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</style>
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<fieldset>
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<legend>Fotos</legend>
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<input multiple type=file accept="image/*" capture=environment>
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<ul id=files-preview></ul>
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</fieldset>
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<fieldset>
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<legend>ISBN/metadatos</legend>
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<div id="reader" width="1800px"></div>
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<input name=isbn placeholder=ISBN>
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<input name=title placeholder=Titulo>
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<input name=author placeholder=Autor>
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<input name=publish-year placeholder="Año publicación">
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<input name=publisher placeholder=Editorial>
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</fieldset>
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<fieldset>
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<input name=price placeholder=Precio type=number>
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<button id=force-prices-preview>Buscar con titulo y autor</button>
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<ul id=prices-preview></ul>
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</fieldset>
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<button id=go>Go!</button>
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<ul id=log></ul>
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<script src=html5-qrcode.min.js></script>
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<script>
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const goAuthorize = () =>
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location.href = `https://auth.mercadolibre.com.ar/authorization?response_type=code&client_id=${CLIENT_ID}&redirect_uri=${location.protocol}//${location.host}`
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const code = (new URLSearchParams(location.search)).get('code')
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if (!code && !localStorage.accessToken) goAuthorize()
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async function getAccessToken() {
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if (localStorage.accessToken) return localStorage.accessToken
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const request = await fetch("/authorize?code="+code)
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const json = await request.json()
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if (json.error === 'invalid_grant') {
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goAuthorize()
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return
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}
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localStorage.accessToken = json.access_token
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return json.access_token
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}
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const $ = s => document.querySelector(s)
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const filesEl = $('input[type=file]')
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const filesPreviewEl = $('#files-preview')
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const pricesPreviewEl = $('#prices-preview')
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const logEl = $('#log')
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function appendLog (msg) {
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const itemEl = document.createElement('li')
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itemEl.append(msg)
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logEl.append(itemEl)
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}
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const goEl = $('#go')
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const inputs = Object.fromEntries([
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'isbn',
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'title',
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'author',
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'publish-year',
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'publisher',
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'price',
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'access-token',
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].map(
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name => [name, $(`input[name=${name}]`)]
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))
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async function onScanSuccess(decodedText, decodedResult) {
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alert(`Code matched = ${decodedText}`);
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inputs.isbn.value = decodedText
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const bibkey = `ISBN:${decodedText}`
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const request = await fetch(`https://openlibrary.org/api/books?bibkeys=${bibkey}&jscmd=details&format=json`)
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const json = await request.json()
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inputs.title.value = json[bibkey]?.details?.title || ''
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inputs.author.value = json[bibkey]?.details?.authors[0]?.name || ''
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getPricePreview()
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inputs.publisher.value = json[bibkey]?.details?.publishers[0] || ''
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inputs['publish-year'].value = json[bibkey]?.details?.publish_date?.match(/\d{4}/)[0] || ''
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}
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async function getPricePreview() {
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let params = new URLSearchParams()
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params.set('q', `${inputs.title.value} ${inputs.author.value} usado`)
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params.set('limit', '50')
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try {
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const request = await fetch(`https://api.mercadolibre.com/sites/MLA/search?${params}`)
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const json = await request.json()
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if (!json.results) throw new Error(JSON.stringify(json))
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pricesPreviewEl.innerHTML=''
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for (const result of json.results) {
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const itemEl = document.createElement('li')
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itemEl.append(`${result.title} - ${result.condition} - ${result.price}`)
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pricesPreviewEl.append(itemEl)
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}
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} catch (error) { alert(error) }
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}
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$('#force-prices-preview').addEventListener('click', getPricePreview)
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function onScanFailure(error) {
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console.warn(`Code scan error = ${error}`);
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}
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let html5QrcodeScanner = new Html5QrcodeScanner(
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"reader",
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{
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fps: 10,
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formatsToSupport: [Html5QrcodeSupportedFormats.EAN_13],
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experimentalFeatures: {
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useBarCodeDetectorIfSupported: true
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},
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rememberLastUsedCamera: true,
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aspectRatio: 1.7777778
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},
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/* verbose= */ false)
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html5QrcodeScanner.render(onScanSuccess, onScanFailure);
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filesEl.addEventListener('change', async event => {
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for (const file of event.target.files) {
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const itemEl = document.createElement('li')
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const imgEl = new Image
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imgEl.src = URL.createObjectURL(file)
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itemEl.append(imgEl)
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const deleteBtnEl = document.createElement('button')
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deleteBtnEl.append("Borrar")
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deleteBtnEl.addEventListener('click', event => {
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event.target.parentElement.remove()
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})
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itemEl.append(deleteBtnEl)
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const id = await uploadImageToML(file)
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imgEl.dataset.id = id
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filesPreviewEl.append(itemEl)
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}
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})
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async function uploadImageToML(file) {
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const formData = new FormData
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formData.set("file", file)
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appendLog(`Subiendo ${file.name}`)
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//https://api.mercadolibre.com proxy
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const request = await fetch('/pictures/items/upload', {
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method: 'POST',
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headers: {
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'Authorization': `Bearer ${await getAccessToken()}`,
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},
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body: formData,
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})
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const json = await request.json()
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appendLog(`[${file.name}] Subido con ID ${json.id}`)
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return json.id
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}
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// categoria Libros, Revistas y Comics: MLA3025
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goEl.addEventListener('click', async event => {
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try {
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const imageIds = [...filesPreviewEl.querySelectorAll('img')].map(
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img => img.dataset.id
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)
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// https://developers.mercadolibre.com.ar/es_ar/publica-productos
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const publishing = {
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"title":inputs.title.value,
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"category_id":"MLA412445",
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"price":inputs.price.value,
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"currency_id":"ARS",
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"available_quantity":1,
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"buying_mode":"buy_it_now",
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"condition":"used",
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"listing_type_id":"free",
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"sale_terms":[
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],
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"pictures": imageIds.map(id => ({id})),
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"attributes":[
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//https://api.mercadolibre.com/categories/MLA3025/attributes
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{ "id":"BOOK_TITLE", "value_name":inputs.title.value },
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{ "id":"AUTHOR", "value_name":inputs.author.value },
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{ "id":"BOOK_PUBLISHER", "value_name":inputs.publisher.value },
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{ "id":"GTIN", "value_name":inputs.isbn.value },
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{ "id":"FORMAT", "value_name":"Fisico" },
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{ "id":"ITEM_CONDITION", "value_name":"Usado" },
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]
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}
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appendLog(`Creando publicación`)
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//https://api.mercadolibre.com proxy
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const request = await fetch("/items", {
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method: 'POST',
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headers: {
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'Authorization': `Bearer ${await getAccessToken()}`,
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},
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body: JSON.stringify(publishing),
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})
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const json = await request.json()
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if (!json.permalink) throw new Error(JSON.stringify(json))
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location.href = json.permalink
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} catch (error) {
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alert(error)
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}
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})
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</script>
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