有没有一种方法可以在不使用库的情况下发送Google日历API的POST请求?Java语言

Question

我正在使用Google Play Services库登录Google Plus。有了这个库，我可以检索访问令牌，向谷歌服务（如日历）发送请求。

我已经收到了一个事件的GET请求，但POST请求有问题。这是GET请求：

HttpURLConnection urlConnection=null；

    String resultJSON = null;
    ArrayList<Event> events = new ArrayList<Event>();
    URL url;
    try {
        url = new URL(baseurl + params[0]);
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestProperty("Authorization", "Bearer "
                + ProjectModel.getInstance().getOauthToken());
        resultJSON = CharStreams.toString(new InputStreamReader(
                urlConnection.getInputStream(), Charsets.UTF_8));
        if (!TextUtils.isEmpty(resultJSON)) {
            JSONArray resultArray;
            resultArray = new JSONObject(resultJSON).getJSONArray("items");

POST的URL与此请求相同：

https://www.googleapis.com/calendar/v3/calendars/id/events

问题是，我找不到将其转换为POST请求的方法。有人知道在不使用日历库的情况下完成这项工作的方法吗？

谢谢！

Answer 1

下面是一个带有httpURLConnection的post请求，用于模拟gdata库的picasa后门。它应该与你所做的类似。我知道你在发送JSON，所以你必须把JSON替换成xmlString并更改内容类型。

    private Document createAlbum() throws ParseException, IOException,
            ParserConfigurationException, SAXException {
        String xmlString = "<entry xmlns='http://www.w3.org/2005/Atom'"
                + " xmlns:media='http://search.yahoo.com/mrss/'"
                + " xmlns:gphoto='http://schemas.google.com/photos/2007'>"
                + "<title type='text'>"
                + GoPreferences.getString(context,
                        SettingRecord.ALBUM_NAME,
                        SettingRecord.ALBUM_NAME_DEFAULT)
                + "</title>"
                + "<summary type='text'>"
                + "This was the recent trip I made"
                + "</summary>"
                + "<gphoto:location></gphoto:location>"
                + "<gphoto:access>public</gphoto:access>"
                + "<gphoto:timestamp>"
                + Long.toString(System.currentTimeMillis())
                + "</gphoto:timestamp>"
                + "<media:group>"
                + "<media:keywords></media:keywords>"
                + "</media:group>"
                + "<category scheme='http://schemas.google.com/g/2005#kind'"
                + " term='http://schemas.google.com/photos/2007#album'></category>"
                + "</entry>";
        URL url = new URL(
                "https://picasaweb.google.com/data/feed/api/user/default");
        HttpURLConnection httpURLConnection = (HttpURLConnection) url
                .openConnection();
        httpURLConnection.setRequestMethod("POST");
        httpURLConnection.setDoInput(true);
        httpURLConnection.setDoOutput(true);
        httpURLConnection.setUseCaches(false);
        // clientid may not be necessary
        httpURLConnection.setRequestProperty("X-GData-Client", CLIENT_ID);
        httpURLConnection.setRequestProperty("GData-Version", "2");
        httpURLConnection.setRequestProperty("Authorization", "OAuth "
                + token);
        httpURLConnection.setRequestProperty("Content-Type",
                "application/atom+xml");
        OutputStream stream = httpURLConnection.getOutputStream();
        OutputStreamWriter sw = new OutputStreamWriter(stream, "UTF-8");
        sw.write(xmlString);
        sw.flush();
        sw.close();
        stream.close();
        if (httpURLConnection.getResponseCode() != 201) {
            return null;
        }
        InputStream result = httpURLConnection.getInputStream();
        DocumentBuilderFactory factory = DocumentBuilderFactory
                .newInstance();
        DocumentBuilder db = factory.newDocumentBuilder();
        Document doc = db.parse(result);
        String href = "";
        NodeList nodeList = doc.getElementsByTagName("link");
        int i = nodeList.getLength();
        for (int j = 0; j < i; j++) {
            Node node = nodeList.item(j);
            NamedNodeMap attr = node.getAttributes();
            if (attr.getNamedItem("rel").getTextContent().equals("edit")) {
                href = attr.getNamedItem("href").getTextContent();
                break;
            }
        }
        if (TextUtils.isEmpty(href)) {
            return null;
        } else {
            GoPreferences.putString(context, ALBUM_URL, href);
            return doc;
        }
}