Question

我有一个软件可以在PC和机器之间建立通信，以前在Java 1.6中工作，但在1.7中不再存在。 IOException - ＆gt; “无效的Http响应”是我在调用getInputStream（）方法时得到的。看起来这个方法已得到改进，而且更敏感，这意味着responseCode = 在Java 1.6中没有专门检查-1结果。

Assoth with Wireshark我检查了两个版本（1.6和1.7）是否发送和接收了相同的以太网帧，两者都是如此。

我只能从PC（客户端）端解决此问题...这意味着无法编辑或更改服务器代码。

我会在如何修改或实现新的东西以使代码兼容ver方面提供任何帮助。 1.7因为我不是以前的程序员...谢谢

序列：

get被称为
返回readResponse（..）被称为
getInputStream（） - ＆gt; IOException的
catch（Exception e）{System.out.println（“error sending get request”+ getURL（）+“string：”+ requestString）; return Error.ethernetException; // TODO

此处为控制台输出：

-1 错误发送获取请求...字符串：* APPLETCOMMINFO_ strResponse：以太网异常

和代码：

private String get(String requestString)/* throws ComunicationException*/ {
    HttpURLConnection httpURLConnection = null;
    OutputStream out = null;        

    try {   
        String encodedRequestString = URLEncoder.encode(requestString, "iso-8859-1");
        String path = getURL().getPath();
        if (!path.endsWith("/")) path = path + "/";
        path = path + encodedRequestString;
        URL fullURL = new URL(getURL().getProtocol(), getURL().getHost(), getURL().getPort(), path);
        httpURLConnection = (HttpURLConnection)fullURL.openConnection();
        httpURLConnection.setRequestMethod("GET");
        httpURLConnection.setDoOutput(false);
        httpURLConnection.setDoInput(true);
        httpURLConnection.setUseCaches(false);

        // Set timeout at 5s
        httpURLConnection.setConnectTimeout(m_nTimeOut);
        httpURLConnection.setReadTimeout(m_nTimeOut);

        return readResponse(httpURLConnection);

    } catch (Exception e) {
        System.out.println("error sending get request " + getURL() + " string: " + requestString);
        return Error.ethernetException; //TODO
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (Throwable t) {
                System.out.println("GET: out.close(), Class: Client");
            }
        }

        if (httpURLConnection != null) {
            try {
                httpURLConnection.disconnect();
            } catch (Throwable t) {
                System.out.println("GET: httpURLConnection.disconnect(), Class: Client");
            }
        }
    }       
}

/**
 * Reads the response from the server into a string.
 * The content length header must be set!
 * @param connection
 * @return
 * @throws IOException
 */
private String readResponse(HttpURLConnection connection) throws IOException {
    if (connection == null) throw new IllegalStateException("connection must not be null");

     connection.connect();

    int status = connection.getResponseCode();
    System.out.println(status);

    // InputStream aaa = connection.getInputStream();


    Reader reader = null;
    try {           
        reader = new InputStreamReader(connection.getInputStream(), "iso-8859-1");

        int readBufferSize = connection.getContentLength();
        if (readBufferSize < 0) {
            // use default buffer size
            readBufferSize = DEFAULT_READ_BUFFER_SIZE;
        }

        // if content length was set, read will be done in a single 
        // iteration because buffer fits... 
        StringBuffer response = new StringBuffer();
        char[] readBuffer = new char[readBufferSize];
        int len;
        while ((len = reader.read(readBuffer)) > 0) {
            response.append(new String(readBuffer, 0, len));                    
        }
        return response.toString();



    } catch (IOException ioe) {
        throw ioe;      
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (Throwable t) {
                System.out.println("readResponse: reader.close(), Class: Client");
                //log
            }
        }
    }
}

/**
 * 
 * @return the url
 */
public URL getURL() {
    return url;
}

}

getInputStream（）的代码与Java 1.6兼容，但是已经有1.7了

0 个答案: