Format Exception When searching

[Zubi1001]

Describe the bug A clear and concise description of what the bug is.

My parameters are ["Olive","Oil"]

  Future<SearchResult?> searchForProduct(List<String> searchTerms) async {
    try {
      ProductSearchQueryConfiguration configuration =
          ProductSearchQueryConfiguration(parametersList: [
        SearchTerms(terms: searchTerms),
        const SortBy(option: SortOption.POPULARITY)
      ], fields: [
        ProductField.ALL,
      ], language: OpenFoodFactsLanguage.ENGLISH);

      SearchResult result = await OpenFoodAPIClient.searchProducts(
          uc.openFoodUser, configuration,
          queryType: QueryType.TEST);

      return result;
    } catch (e, stacktrace) {
      log(e.toString());
      print(stacktrace);
      return null;
    }
  }

Expected behavior A clear and concise description of what you expected to happen.

**```
[log] FormatException: Unexpected character (at character 1)
      <!-- start templates/web/common/site_layout.tt.html -->
      ^
flutter: #0      _ChunkedJsonParser.fail (dart:convert-patch/convert_patch.dart:1383:5)
#1      _ChunkedJsonParser.parseNumber (dart:convert-patch/convert_patch.dart:1250:9)
#2      _ChunkedJsonParser.parse (dart:convert-patch/convert_patch.dart:915:22)
#3      _parseJson (dart:convert-patch/convert_patch.dart:35:10)
#4      JsonDecoder.convert (dart:convert/json.dart:612:36)
#5      JsonCodec.decode (dart:convert/json.dart:216:41)
#6      OpenFoodAPIClient.getProducts
package:openfoodfacts/openfoodfacts.dart:312
<asynchronous suspension>
#7      FoodService.searchForProduct
package:affili_fit/…/foodService/food_service.dart:36
<asynchronous suspension>
#8      _TestGroundState.build.<anonymous closure>
package:affili_fit/main.dart:61
<asynchronous suspension>
```**

package information: Openfoodfacts package version:

Additional context Add any other context about the problem here.

[monsieurtanuki]

Hi @Zubi1001!

I've just tested and that's OK for me:

• it's maybe a "bad luck" error, as the TEST env is notoriously unstable
• I would suggest you to work on PROD instead, unless you have good reasons to work on TEST

Basically the error you get is because we expect json data, and obviously something bad happened on the TEST server that did not return json data. Could be a timeout. Could be that your user is not a TEST user, but a PROD user.

Feel free to close the issue if solved.

For the record, my code:

      final ProductSearchQueryConfiguration configuration =
          ProductSearchQueryConfiguration(
        parametersList: [
          SearchTerms(terms: ["Olive", "Oil"]),
          const SortBy(option: SortOption.POPULARITY)
        ],
        fields: [ProductField.ALL],
        language: OpenFoodFactsLanguage.ENGLISH,
      );

      final SearchResult result = await OpenFoodAPIClient.searchProducts(
        TestConstants.TEST_USER,
        configuration,
        queryType: QueryType.TEST,
      );

      expect(result.products!.length, 24); // page 1
      print('results: ${result.count}'); // 285

[Zubi1001]

@monsieurtanuki It's not working for me, I am on Flutter 3.0.3. What should I do?

P.s I really appreciate you getting back to me so quickly.

[monsieurtanuki]

@Zubi1001 I don't think it has anything to do with the flutter version, what we do in this package is very basic. So, you copied/pasted my code and it still does not work, am I right? As it works on my computer I cannot be really helpful. I suggest that you help us fix that bug by installing openfoodfacts-dart on your computer, trying to reproduce that bug and possibly printing the response body (which is not json formatted though it should).

[M123-dev]

Just tested it as well and I think I found the problem, when you plug in wrong credentials it fails as presumably the backend returns a error html page not a json.

@Zubi1001 can you check if your credentials are correct

We should catch this and throw a better error

[Zubi1001]

@M123-dev Could my credentials be wrong if the login() function returns true?

[Zubi1001]

"<!-- start templates/web/common/site_layout.tt.html -->

<!doctype html>
<html class="no-js" lang="en" data-serverdomain="openfoodfacts.net" dir="ltr">
<head>
    <meta charset="utf-8">
    <title>Error</title>

    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta property="fb:app_id" content="219331381518041">
    <meta property="og:type" content="food">
    <meta property="og:title" content="">
    <meta property="og:url" content="https://world.openfoodfacts.net">

    <meta property="og:image" content="https://world.openfoodfacts.org/images/misc/openfoodfacts-logo-en-356.png">
    <meta property="og:description" content="">
    <link rel="apple-touch-icon" sizes="180x180" href="/images/favicon/apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="/images/favicon/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="/images/favicon/favicon-16x16.png">
<link rel="manifest" href="/images/favicon/site.webmanifest">
<link rel="mask-icon" href="/images/favicon/safari-pinned-tab.svg" color="#5bbad5">
<link rel="shortcut icon" href="/images/favicon/favicon.ico">
<meta name="msapplication-TileColor" content="#ffffff">
<meta name="msapplication-config" content="/images/favicon/browserconfig.xml">
<meta name="theme-color" content="#ffffff">

<meta name="apple-itunes-app" content="app-id=588797948">
<meta name="flattr:id" content="dw637l">

    <link rel="canonical" href="https://world.openfoodfacts.net">
    <link rel="stylesheet" href="https://static.openfoodfacts.net/css/dist/app-ltr.css?v=1658168089">
    <link rel="stylesheet" href="https://static.openfoodfacts.net/css/dist/jqueryui/themes/base/jquery-ui.css">
    <link rel="stylesheet" href="https://static.openfoodfacts.net/css/dist/select2.min.css">
    <link rel="search" href="https://world.openfoodfacts.net/cgi/opensearch.pl" type="application/opensearchdescription+xml" title="Open Food Facts">

    <style media="all">

    </style>
    <!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-HQX9SYHB2P&aip=1"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());
  gtag('set', 'allow_google_signals', false);
  gtag('config', 'G-HQX9SYHB2P', {"anonymize_ip": true, 'allow_google_signals': false});
</script>
<!-- Matomo -->
<script>
  var _paq = window._paq = window._paq || [];
  /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
  _paq.push(["setDocumentTitle", document.domain + "/" + document.title]);
  _paq.push(["setCookieDomain", "*.openfoodfacts.org"]);
  _paq.push(["setDomains", ["*.openfoodfacts.org"]]);
  _paq.push(["setDoNotTrack", true]);
  _paq.push(["disableCookies"]);
  _paq.push(['trackPageView']);
  _paq.push(['enableLinkTracking']);
  (function() {
    var u="//analytics.openfoodfacts.org/";
    _paq.push(['setTrackerUrl', u+'matomo.php']);
    _paq.push(['setSiteId', '5']);
    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
    g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);
  })();
</script>
<noscript><p><img src="//analytics.openfoodfacts.org/matomo.php?idsite=5&amp;rec=1" style="border:0;" alt="" /></p></noscript>
<!-- End Matomo Code -->

</head>
<body class="error_page">
<nav class="top-bar" data-topbar id="top-bar">
    <ul class="title-area">
        <li class="name">
            <h2><a href="/">
                <img id="logo" src="https://static.openfoodfacts.net/images/logos/off-logo-horizontal-light.svg" alt="Open Food Facts" style="height:2rem;">
            </a></h2>
        </li>
        <li class="toggle-topbar menu-icon">
            <a href="#"><span>Menu</span></a>
        </li>
    </ul>
    <section class="top-bar-section">
    <label for="select_country" style="display:none">Country</label>
    <ul class="country_language_selection">
            <li class="has-form has-dropdown" id="select_country_li">
                <select id="select_country" style="width:100%" data-placeholder="Country">
                    <option></option>
                </select>
            </li>

    </ul>
    <ul class="search_and_links">
      <li class="show-for-large-up">
        <form action="/cgi/search.pl">
          <div class="row collapse">
            <div class="small-8 columns">
              <input type="text" placeholder="Search for a product" name="search_terms" value="Olive+Oil">
              <input name="search_simple" value="1" type="hidden">
              <input name="action" value="process" type="hidden">
            </div>
            <div class="small-4 columns">
              <button type="submit" title="Search"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon" aria-hidden="true" focusable="false"><path d="M15.5 14h-.79l-.28-.27C15.41 12.59 16 11.11 16 9.5 16 5.91 13.09 3 9.5 3S3 5.91 3 9.5 5.91 16 9.5 16c1.61 0 3.09-.59 4.23-1.57l.27.28v.79l5 4.99L20.49 19l-4.99-5zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z"/><path d="M0 0h24v24H0z" fill="none"/></svg></button>
            </div>
          </div>
        </form>
      </li>
      <li class="show-for-large-only"><a href="/cgi/search.pl" title="Advanced search"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon" aria-hidden="true" focusable="false"><path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/><path d="M0 0h24v24H0z" fill="none"/></svg></a></li>
      <li class="show-for-xlarge-up"><a href="/c

This is part of the string that jsonDecode is failing to decode, could it be that I am not receiving a Json response?

[Zubi1001]

@monsieurtanuki @M123-dev

[M123-dev]

Yes it's a html answer, that's a common flaw with the api when something wrong happens it answers with a html page because the website and the api are the same project.

I couldn't see the problem in the html you send, could you check if there is a full version.

Also no the login method is supposed to work but to test if maybe it's broken maybe try to login on world.openfoodfacts.org

[monsieurtanuki]

@M123-dev Could my credentials be wrong if the login() function returns true?

@Zubi1001 It could if you're login in PROD and searching in TEST. Again, what the hell are you doing in TEST?