Question

我一直陷入困境 - 当运行httpsurlconnection调用时，我试图设置一系列标题但是在调试它时显示我添加的标题为NULL。

代码：

    URL obj = new URL(url);

    HttpsURLConnection con = (HttpsURLConnection) obj.openConnection(proxy);

    //HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();

    con.setDoInput(true);
    con.setDoOutput(true);

    //add reuqest header
    con.setRequestMethod("POST");
    con.addRequestProperty("Accept-Language", "en-GB");
    con.addRequestProperty("X-ApiKey", "xxxx-xxx-xxx-xxx-xxx");
    con.addRequestProperty("Content-Type", "application/json");


    List<NameValuePair> postParameters = new ArrayList<NameValuePair>();
    postParameters.add(new BasicNameValuePair("Password", "xxxxxxxxxxxxxx"));
    postParameters.add(new BasicNameValuePair("Email", "xxxxx.xxxxx@xxxxxxx.xxxx"));

    OutputStream os = con.getOutputStream();
    BufferedWriter writer = new BufferedWriter(
            new OutputStreamWriter(os));
    writer.write(getQuery(postParameters));
    writer.flush();
    writer.close();
    os.close();

为了测试它们是否正确设置我添加了

con.getHeaderField("X-ApiKey");
con.getHeaderFields();

确定我的标题字段是否已正确设置。然而，似乎他们没有。

相应的回应：

Post Headers: null

Post Headers: {Content-Length=[11339], Connection=[keep-alive], X-Frame-Options= [SAMEORIGIN], X-Request-Identifier=[xxxxxxxxxxxxxxxxxx], Date=[Wed, 05 Oct 2016 16:56:49 GMT], Content-Type=[text/html], null=[HTTP/1.1 400 Bad Request], Cache-Control=[private]}

我在上面的代码中出错了哪个没有正确设置标题。

Answer 1

您应该使用con.getRequestProperty("X-ApiKey")和con.getRequestProperties()

方法getHeaderField("")会从响应标头返回标头字段的值。这非常令人困惑，因此应该更好地称为getResponseHeaderField("name")

输出不为空，因为在openConnection(URL)被调用后，您的连接已经来自服务器的响应。

httpsurlconnection未在addRequestProperty

1 个答案: