Apache http-client到Tomcat servlet:无法接收多部分实体

时间:2012-03-06 16:40:10

标签: java android servlets apache-httpcomponents

我尝试将来自Android应用的http请求发送到使用Tomcat托管的Java Servlet。应用程序会将一些文本和图像数据发送到servlet,但servlet似乎没有看到多部分表单数据。我已经从本教程中获得了一些指导以及一些确认传入数据的IRC帮助:http://blog.tacticalnuclearstrike.com/2010/01/using-multipartentity-in-android-applications/

Android代码:
//// libs:httpclient-4.1.3,httpcore-4.1.4,httpmime-4.1.3,apache-mime4j-core-0.7.2

HttpPost httpPost = new HttpPost(mURI);
MultipartEntity requestEntity = new MultipartEntity();
requestEntity.addPart("text", new StringBody("test text"));
requestEntity.addPart("image", new ByteArrayBody(mImage, "image"));
httpPost.setEntity(requestEntity);
HttpResponse httpResponse = mHttpClient.execute(httpPost);

servlet代码:

@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) {
    try {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();

        File file = new File(getServletContext().getRealPath("/") + File.separator + "WEB-INF" + File.separator + "sms-mobile-image.jpg");
        file.createNewFile();
        Writer outfile = new OutputStreamWriter(new FileOutputStream(file));
        List<Part> formData = new ArrayList(request.getParts());
        if(formData.size()>0)
            System.out.println(formData.get(0).getName());
        else
            System.out.println("no form data found");
    } catch(Exception e) {
        System.out.println(e.toString());
    }
}

发送的实际数据(通过wireshark确认):

POST /mobile-image/ProcessRequest HTTP/1.1
Content-Length: 921897
Content-Type: multipart/form-data; boundary=ZiB5ibYqpxux_mP6HeswY9B__17vOLCVvay01
Host: 192.168.1.167:8080
Connection: Keep-Alive

--ZiB5ibYqpxux_mP6HeswY9B__17vOLCVvay01
Content-Disposition: form-data; name="text"
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 8bit

test text
--ZiB5ibYqpxux_mP6HeswY9B__17vOLCVvay01
Content-Disposition: form-data; name="image"; filename="image"
Content-Type: application/octet-stream
Content-Transfer-Encoding: binary

[image-data-here]
--ZiB5ibYqpxux_mP6HeswY9B__17vOLCVvay01--

输出:

no form data found

有人建议我查看web.xml配置,以便我的下一步,但我觉得这里不知所措。这不是它应该工作的方式吗?

1 个答案:

答案 0 :(得分:0)

我能够使用com.oreilly.servlet包来解决这个问题。虽然这很遗憾,我仍然认为我可能做错了什么。这似乎应该被构建到httpclient库中......无论如何,如果你感兴趣,有很多例子可以使用这个库,我所遵循的就是: http://www.jguru.com/faq/view.jsp?EID=1045507

在页面的某处发布了srinivas的回复。