Question

我在java中有一个代码，它使用POST将byte []发送到CQ servlet。发送代码是：

        URL url = new URL("http://localhost:4503/bin/services/updateslafile");   
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();                    
        String authStr = "admin:admin";
        // encode data on your side using BASE64
        byte[] bytesEncoded = Base64.encodeBase64(authStr.getBytes());
        String authEncoded = new String(bytesEncoded);                                                                          
        connection.setRequestProperty("Authorization", "Basic "+authEncoded);
        connection.setDoOutput(true);      
        connection.setRequestMethod("POST");   
        connection.setRequestProperty("fileName", "test.docx");
            byte[] input;//assume input initialized with some .docx file content as byte[]
        OutputStream outs = connection.getOutputStream();
        outs.write(input);
        outs.flush();   
        outs.close();

        //for response reading
        StringBuffer strBuffer = new StringBuffer();
        InputStream inputStream = connection.getInputStream();
        byte[] b = new byte[1024];
        while ( is.read(b) != -1)
            strBuffer.append(new String(b));
        System.out.println("strbuffer : "+strBuffer.toString());

用于读取byte []的servlet中的代码（扩展SlingAllMethodsServlet）如下所示：

            String fileName = request.getHeader("fileName");
            // opens input stream of the request for reading data

           InputStream inputStream = request.getInputStream();// This line giving error
            String filePath = "/home/usr/documents/"+fileName;
            // opens an output stream for writing file
            FileOutputStream fileOuputStream = new FileOutputStream(filePath); 

            byte[] buffer = new byte[BUFFER_SIZE];
            int bytesRead = -1;
            LOGGER.info("Receiving data...");
            while ((bytesRead = inputStream.read(buffer)) != -1) {
                     fileOuputStream.write(buffer, 0, bytesRead);
            }
            LOGGER.info("Data received.");
            fileOuputStream.close();
            inputStream.close();

现在，当我在错误日志中运行代码时，我收到了一些错误

08.03.2016 15:19:37.162 ERROR [127.0.0.1 [1457430567960] POST / bin / services / updateslafile HTTP / 1.1] org.apache.sling.engine.impl.SlingRequestProcessorImpl service：未捕获的Throwable java.lang.IllegalStateException：请求数据已被读取

除了这个错误，我也遇到了错误，但我认为这不相关。

08.03.2016 15:17:31.092 ERROR [qtp87442412-7274] org.apache.sling.engine.impl.parameters.ParameterSupport getRequestParameterMapInternal：解析请求时出错 java.lang.IllegalArgumentException：错误的转义序列：％ۑ

我知道request.getInputStream（）提出了一些问题但不确定如何解决它

Answer 1

当接收到多部分消息时，Sling和HTTPServletRequest之后的servlet实现将为您解析输入流中的多部分参数，但是会在这样做时读取流。这使得request.getInputStream();无法使用，但多部分对象将通过request.getRequestParameterMap()进行解析并可用。有关处理多部分文件上传的有用链接，请访问:(编辑 - 新链接：Handling File Upload in CQ）

Answer 2

我认为这是因为您缺少多部分信息，请查看Sending files using POST with HttpURLConnection并更新您的代码，它应该可以解决问题。

Answer 3

好吧，我通过另一种方式处理它让它工作。现在我将byte []作为字符串发送到参数中的servlet，如下所示：

＆＃13;

connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("fileName", filename);
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
writer.write("inputstream=" + Arrays.toString(input));
writer.close();

＆＃13;

然后在servlet中读取如下参数：

＆＃13;

String encodingScheme = "UTF-8";
request.setCharacterEncoding(encodingScheme);
String requestStr = request.getParameter("inputstream");
byte[] rawRequestMsg = requestStr.getBytes();

＆＃13;

像这样我在servlet中获取byte []但是这里的问题是当我将这个byte []序列写入文件时，而不是写入内容只写入字节，所以我只看到文件中的数字。我在文件中写的代码如下：

＆＃13;

FileOutputStream fileOuputStream = new FileOutputStream(uploadedFileLocation);
fileOuputStream.write(byteArray); // byteArray is byte[]		
fileOuputStream.close();

＆＃13;

java.lang.IllegalStateException：请求数据已经被读取CQ5，AEM

3 个答案: