Question

我花了一个星期的时间试图找出如何更新某些卡片信息，我希望能够更新一个字段，例如： name，desc，idList，closed etc等，但环顾四周之后，似乎必须单独完成，但是当我尝试时，我会继续收到400响应，并显示“值无效”的消息。

e.g。当我尝试 PUT https://api.trello.com/1/cards/[cardid]/desc?key=[mykey]&token=[mytoken]value=just+yet+another+test+of+trello+side+extended

我做错了什么？

用于发送Put的Java代码是

private static InputStream doRequest(final String url, final String requestMethod, final Map<String, String> map) 
{
    try 
    {
        final HttpsURLConnection conn = (HttpsURLConnection) new URL(url)
                .openConnection();
        conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
        conn.setDoOutput(requestMethod.equals(METHOD_POST) || requestMethod.equals(METHOD_PUT));
        conn.setRequestMethod(requestMethod);

        String plus = "";
        if (map != null && !map.isEmpty()) 
        {
            final StringBuilder sb = new StringBuilder();
            for (String key : map.keySet()) 
            {
                sb.append(sb.length() > 0 ? "&" : "")
                    .append(key)
                    .append("=")
                    .append(URLEncoder.encode(map.get(key), "UTF-8"));
            }
            conn.getOutputStream().write(sb.toString().getBytes());
            conn.getOutputStream().close();
            plus = sb.toString();
        }
        final int rc = conn.getResponseCode();
        logger.info("response " + rc + " from " + requestMethod + " " + url + plus);
        if (rc > 399) 
        {
             return null;
        } 
        else 
        {
            return getWrappedInputStream(
                conn.getInputStream(), GZIP_ENCODING.equalsIgnoreCase(conn.getContentEncoding())
            );
        }
    } 
    catch (IOException e) 
    {
        throw new TrelloException(e.getMessage());
    }
}

Answer 1

我发现我在代码中遗漏了一行

            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

解决了这个问题，所以现在这里是doRequest的完整代码...

    private static InputStream doRequest(final String url, final String requestMethod, final Map<String, String> map) 
{
    try 
    {
        final HttpsURLConnection conn = (HttpsURLConnection) new URL(url).openConnection();
        conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
        conn.setDoOutput(requestMethod.equals(METHOD_POST) || requestMethod.equals(METHOD_PUT));
        conn.setRequestMethod(requestMethod);
        // following line was missing and caused PUT not to work.
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

        String arguments = "";
        if (map != null && !map.isEmpty()) 
        {
            final StringBuilder sb = new StringBuilder();
            for (String key : map.keySet()) 
            {
                sb.append(sb.length() > 0 ? "&" : "");
                sb.append(URLEncoder.encode(key, HTTP_CHARACTER_ENCODING));
                sb.append("=");
                sb.append(URLEncoder.encode(map.get(key), HTTP_CHARACTER_ENCODING));
            }
            conn.getOutputStream().write(sb.toString().getBytes());
            conn.getOutputStream().close();
            arguments = sb.toString();
        }
        conn.connect();

        final int rc = conn.getResponseCode();
        final String responseMessage = conn.getResponseMessage();
        if (rc != 200)
            logger.info("response " + rc + " (" + responseMessage + ") from " + requestMethod + " " + url + " args:" + arguments);
        if (rc > 399) 
        {
            final String str = stream2String(conn.getErrorStream());
            logger.info("error response:" + str);
            return null;
        } 
        else 
        {
            return getWrappedInputStream(
                conn.getInputStream(), GZIP_ENCODING.equalsIgnoreCase(conn.getContentEncoding())
            );
        }
    } 
    catch (IOException e) 
    {
        throw new TrelloException(e.getMessage());
    }
}

Answer 2

根据您的代码：

sb.append(sb.length() > 0 ? "&" : "")
                .append(key)
                .append("=")
                .append(URLEncoder.encode(map.get(key), "UTF-8"));

看起来你实际上正在建立一个看起来像的网址：

https://api.trello.com/1/cards/[cardid]/desc?key=[mykey]&token=[mytoken]value=just+yet+another+test+of+trello+side+extended

请注意，&和token参数之间没有value。

trello api“PUT / 1 / cards / [card id] / desc”返回400响应，并显示消息“值的值无效”

2 个答案: