Java-HttpUrlConnection contient un document HTTP au lieu de JSON
J'essaie de télécharger un fichier MP3 d'un fichier youtube donné à partir de Youtubeinmp3.com
Parfois, cela fonctionne plutôt bien et parfois l'api renvoie un document HTTP au lieu d'un objet JSON. J'ai essayé d'envoyer des différentes requêtes à l'API à l'aide d'une boucle foreach et getAudioLink fonction, comme vous pouvez le voir dans le code ci-dessous. Mon objet musicTitle contient trois chaînes (VideoID, VideoTitle et ThumbnailURL). Tous sont stockés dans une liste qui est créée à chaque fois que je démarrer une recherche.
Mais je ne sais pas pourquoi l'API renvoie parfois un document HTTP au lieu d'un objet JSON. Le code d'erreur que j'obtiens est déclenché à partir de l'analyse du document HTTP et peut également être vu ci-dessous.
public static void main(String[] args)
{
....
for (MusicTitle musicTitle : myList)
{
System.out.println(getAudioLink(YOUTUBE_URL_C + musicTitle.getVideoID()));
}
}
public static String getAudioLink(String inputLink)
{
String result = null;
HttpURLConnection request = null;
URL url = null;
try
{
url = new URL("http://YoutubeInMP3.com/fetch/?format=JSON&video=" + inputLink);
System.out.println(url.toString());
request = (HttpURLConnection) url.openConnection();
request.connect();
InputStreamReader reader = new InputStreamReader((InputStream)request.getContent());
JsonParser jsonParser = new JsonParser(); // GSON-Library
JsonObject youtubeInMP3 = (JsonObject)jsonParser.parse(reader).getAsJsonObject();
if (youtubeInMP3 != null)
{
result = youtubeInMP3.get("link").getAsString();
}
request.disconnect();
reader.close();
}
catch (MalformedURLException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
return result;
}
Code d'erreur:
Exception in thread "main" com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 12 path $
at com.google.gson.JsonParser.parse(JsonParser.java:65)
at Main.getAudioLink(Main.java:51)
at Main.main(Main.java:30)
Caused by: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 12 path $
at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1573)
at com.google.gson.stream.JsonReader.checkLenient(JsonReader.java:1423)
at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:546)
at com.google.gson.stream.JsonReader.peek(JsonReader.java:429)
at com.google.gson.JsonParser.parse(JsonParser.java:60)
... 2 more
MODIFIER 1
Par exemple, si je recherche le groupe "Volbeat", il renvoie le document HTTP vu ci-dessous.
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Your MP3 Is Ready</title>
<meta name="description" content="Download and alternatively edit your YouTube video before saving the MP3 on your device." />
<meta name="keywords" content="edit, download, convert, youtube, mp3" />
<meta name="author" content="YouTube In MP3" />
<meta name="distribution" content="global">
<meta name="language" content="en" />
<link rel="stylesheet" type="text/css" href="/css/style.css?v=1.2.2">
<link href='http://fonts.googleapis.com/css?family=Open+Sans:400,400italic|Roboto' rel='stylesheet' type='text/css'>
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</head>
<body class="home">
<div id="fb-root"></div>
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if (d.getElementById(id)) return;
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fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
<header>
<p><a href="/"><img src="/images/icon.png" class="verticalAlign" alt="YouTube In MP3 Icon"> <span class="logoText">YouTubeInMP3.com</span></a></p>
<nav>
<ul>
<li><a><i class="fa fa-bars fa-2x verticalAlign"></i> Menu</a>
<ul>
<li><a href="/blog/">Blog</a></li>
<li><a href="/faq/">FAQ</a></li>
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</ul>
</nav>
</header>
<div id="contain-160" class="ad ad-160 loader"></div>
<div class="link-popup" id="linkpopup">
<div class="popup">
<h2>Link to this MP3</h2>
<p><i class="fa fa-link fa-2x verticalAlign"></i> Direct Link:</p>
<code>http://www.youtubeinmp3.com/download/?video=https://www.youtube.com/watch?v=-2Y4t9elm_A</code>
<p><i class="fa fa-comment fa-2x verticalAlign"></i> Forum:</p>
<code>[url=http://www.youtubeinmp3.com/download/?video=https://www.youtube.com/watch?v=-2Y4t9elm_A]Download MP3 - Volbeat - Mary Ann's Place (Official Video)[/url]</code>
<p><i class="fa fa-code fa-2x verticalAlign"></i> HTML:</p>
<code><a href="http://www.youtubeinmp3.com/download/?video=https://www.youtube.com/watch?v=-2Y4t9elm_A">Download MP3 - Volbeat - Mary Ann's Place (Official Video)</a></code>
<a onclick="toggle_visibility('linkpopup');" class="close">×</a>
</div>
</div>
<div class="link-popup" id="editShow">
<div class="popup">
<div class="paddingBottomOptions">
<h2><i class="fa fa-scissors"></i> Cut MP3</h2>
<input placeholder="Cut From" class="cutMP3Slider" type="text" id="slider-margin-value-min" /> -
<input placeholder="Cut To" class="cutMP3Slider" type="text" id="slider-margin-value-max" /><br />
</div>
<div class="paddingBottomOptions">
<h2><i class="fa fa-eye"></i> Show video editor</h2>
<div class="checkBoxDiv">
Display Video Editor: <input class="checkBoxRight" type="checkbox" id="displayEditor"><br />
Always display Video Editor: <input class="checkBoxRight" type="checkbox" id="permanentDisplay">
</div>
</div>
<div class="paddingBottomOptions">
<h2><i class="fa fa-tag"></i> ID3 Tags</h2>
<div class="checkBoxDiv">
Identify ID3 Tags Automatically: <input checked="checked" disabled class="checkBoxRight" type="checkbox" id="autoID3">
</div>
</div>
<h2><i class="fa fa-font"></i> Change MP3 name</h2>
<input class="fullWidth" value="Volbeat - Mary Ann's Place (Official Video).mp3" placeholder="MP3 Name" type="text" id="customMP3Name" />
<a onclick="toggle_visibility('editShow');" class="close">×</a>
</div>
</div>
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<div class="popup">
<h2>Spread the word</h2>
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<section class="video">
<form id="form" action="" method="GET">
<input id="video" type="search" name="video" placeholder="Paste A Link Or Search For A Video Title" />
<!-- Small screen search results -->
<div id="searchResultMobile" class="searchResultMobile loader"></div>
<button id="searchButton" onclick="search()" type="submit"><i class="fa fa-search"></i> Convert To MP3</button>
<!-- Large screen search results -->
<div id="searchResultLarge" class="searchResultLarge loader"></div>
</form>
<link rel="stylesheet" property="stylesheet" type="text/css" href="//cdnjs.cloudflare.com/ajax/libs/noUiSlider/8.0.2/nouislider.min.css">
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<div class="embed loader">
<div id="player"></div>
<div id="slider"></div>
</div>
<div class="infoBox">
<h1 class="titleVideo"><img class="thumbnailTitle" alt="YouTube Thumbnail" src="http://img.youtube.com/vi/-2Y4t9elm_A/default.jpg"> Volbeat - Mary Ann's Place (Official Video)</h1>
<p class="floatLeft"><i class="fa fa-clock-o"></i> Length: <span class="bold">
|
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</p>
<div id="status">
</div>
<p class="download-buttons fullWidth">
<a class="button fullWidth" id="download" href="get/?i=6%2FARY3w4SlqKhP7hMpnw8skpb2vhQEwDg9rFg6URKpAEbyz736HFUpKqz6uO8TSy5YETAnmYwF995a0lNbbZLw%3D%3D"><i class="fa fa-download"></i> Convert & Download MP3</a>
<a onclick="toggle_visibility('editShow');" class="button button-gray"><i class="fa fa-cogs"></i> Settings</a><a rel="nofollow" href="http://www.youtubeinmp4.com/youtube.php?video=http://www.youtube.com/watch?v=-2Y4t9elm_A" class="button button-gray"><i class="fa fa-television"></i> Download in MP4 format</a><a rel="nofollow" href="http://www.saveitoffline.com/go/?l=http://www.saveitoffline.com/#http://www.youtube.com/watch?v=-2Y4t9elm_A" class="button button-gray"><i class="fa fa-file-o"></i> Other Formats</a>
</p>
<div id="contain-300" class="ad ad-300 loader"></div>
<div class="floatRight">
<div class="firstBlock">
<h2 class="firstBlockHeader">How do I download my MP3?</h2>
Your video has been prepared and is ready to be downloaded.<br />
To continue, simply press <strong>"Convert & Download MP3"</strong>.<br /><br />
Your MP3 has been converted to the highest quality possible and ID3 tags have been automatically identified and added.<br />
You can customize your download by changing the <a class="green" onclick="toggle_visibility('editShow');">Options</a>.<br />
</div>
<div class="secondBlock">
<h2 class="secondBlockHeader">How do I edit my MP3?</h2>
You can edit your MP3 by clicking "Settings" (grey button, found above on the left side) button.<br>
There are two ways of editing an MP3 before downloading it:<br>
<br>
1) Specify the start and end time manually, in the Settings menu.<br>
2) Enable the video editor from the Settings menu and use the sliders to set the start and end time.
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MODIFIER 2
Si je recherche des morceaux ou des groupes populaires, je reçois ~12 des 15 résultats valides. Mais si je recherche des pistes que personne n'écouterait, je reçois ~1 des 15 résultats valides.
Est-il possible que le serveur web qui gère les informations de l'API YoutubeInMp3 réponde avec des documents HTTP s'il (le serveur Web) ne connaît pas la piste et le lien de téléchargement correspondant?
MODIFIER 3
Comme je l'ai supposé, le problème est que le serveur Web ne connaît pas la piste. Si je visite manuellement le lien du document HTML reçu, je dois confirmer que la piste est convertir. Après ça je peux le télécharger manuellement et avec l'aide de mon programme.
Donc je suppose que la réponse HTML est un indice que le serveur Web n'a pas de réponse valide à ma demande.
1
Author: endkugelfang, 2016-01-07
1 answers
... je ne sais pas pourquoi l'API renvoie parfois un document HTTP
Le document HTTP est très probablement un rapport d'erreur quelconque. Si tel est le cas, il (le document HTML) devrait vous donner quelques indices sur le vrai problème.
Imprimez le code HTML. Si vous ne pouvez pas comprendre ce que signifie le rapport, ajoutez-le à votre question afin que nous puissions vous aider.
1
Author: Stephen C, 2016-01-07 11:34:17