如何使用HttpUrlConnect用Java查詢Github graphql API

Question

我不知道我的代碼有什么問題，當我嘗試向GitHub發出請求時，我一直收到錯誤401。 我的應用程序之前使用REST API並將其轉換為Graphql，但我發現這很困難

private static String makeHttpRequest(URL url) throws IOException {
    String jsonResponse = "";

   // If the URL is null, then return early.
    if (url == null) {
        return jsonResponse;
    }

    HttpURLConnection urlConnection = null;
    InputStream inputStream = null;
    try {
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setReadTimeout(10000 /* milliseconds */);
        urlConnection.setConnectTimeout(15000 /* milliseconds */);
        urlConnection.setRequestMethod("POST");
        urlConnection.setDoOutput(true);
        urlConnection.setDoInput(true);
        urlConnection.setRequestProperty("Authorization","Bearer token");
        urlConnection.setRequestProperty("Content-Type", "application/json");


        DataOutputStream wr = new DataOutputStream(urlConnection.getOutputStream());
        wr.writeBytes("{\"query\":\"query{search(type:USER query:\"location:lagos language:java\"){userCount}}}");
        wr.flush();
        wr.close();

        int rc = urlConnection.getResponseCode();
        inputStream = urlConnection.getInputStream();
        jsonResponse = readFromStream(inputStream);

    } catch (IOException e) {
        Log.e(LOG_TAG, "Problem retrieving the earthquake JSON results.", e);
    } finally {
        if (urlConnection != null) {
            urlConnection.disconnect();
        }
        if (inputStream != null) {
            inputStream.close();
        }
    }
    return jsonResponse;
}

Answer 1

發現錯誤

我的令牌存在問題，查詢格式錯誤，應該是

"{\"query\": \"query { search ( type : USER, query : \\\"location:lagos\\\" ) { userCount }}\"}" 

謝謝你的建議

Answer 2

授權標頭令牌可能無效。 HTTP 401 =未授權。

Answer 3

我建議嘗試使用Curl發出相同的請求，當您看到成功時-將相同的參數/標頭應用於HttpUrlConnection。