谷歌翻译 Api 错误 414 (Request-URI Too Large) java

Question

在 Google Translate Api for Java 的官方文档中，它说我们可以使用 post-method 发送超过 2K 的字符。 https://developers.google.com/translate/v2/using_rest

但是，当我尝试翻译长度超过 2k 的文本时，我收到错误 414（请求 URI 太大）。

StringBuilder sb = new StringBuilder();
HttpURLConnection connection = null;
try {
    URL url = new URL("https://www.googleapis.com/language/translate/v2");
    String urlParameters = "key=" + apiKey + "&source=" + shortLang1 + 
            "&target=" + shortLang2 + "&q=" + URLEncoder.encode(lyrics, "UTF-8");
    connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("POST");
    connection.setDoInput(true);
    connection.setDoOutput(true);
    connection.setUseCaches (false);
    connection.addRequestProperty("X-HTTP-Method-Override", "GET");
    DataOutputStream wr = new DataOutputStream (connection.getOutputStream ());
    wr.writeBytes (urlParameters);
    wr.flush ();
    wr.close ();
    BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
    if (connection.getResponseCode() != 200) {
        return null;
    }
    String line;
    while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
    }
    reader.close();
} catch (Exception e) {
    e.printStackTrace();
} finally {
    if (connection != null) {
        connection.disconnect();
    }
}

更新：我明白了，上面的代码是对的。最后我意识到这个错误不是来自 Google 翻译服务，而是来自我在 Google App Engine 上的代理。

Answer 1

您链接到的文档是说您使用 POST 方法并且您将参数放入请求正文...而不是请求 URL。

参考：

• How are parameters sent in an HTTP POST request?