Question

西洛

我尝试将一些数据上传到我的网络服务器。 whit curl工作正常

curl -s -uedoweb-admin:admin -F"data=@/home/raul/test/t1/6376990.pdf;type=application/pdf" -XPUT api.localhost/resource/frl:6376979/data

这里的痕迹 http://pastebin.com/jJmungAy

这里是新的方法。

        URL myurl;
    HttpURLConnection conn;
    String port = "9000";

    String user = "edoweb-admin";
    String password = "admin";
    String encoding = Base64.encodeBase64String((user + ":" + password).getBytes());
    String boundary = "==" + System.currentTimeMillis() + "===";
    String crlf = "\r\n";
    String twoHyphens = "--";
    String attachmentName = "data";
    String attachmentFileName = "6376986.pdf";

    DataOutputStream request;

    try {
        myurl = new URL("http://localhost:9000/resource/frl:6376984/data");
        conn = (HttpURLConnection) myurl.openConnection();
        conn.setDoOutput(true);
        conn.setRequestMethod("PUT");
        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
        conn.setRequestProperty("Accept", "*/*");

    } catch (Exception e) {
        throw new RuntimeException(e);
    }

    try {
        request = new DataOutputStream(conn.getOutputStream());

        request.writeBytes(twoHyphens + boundary + crlf);
        request.writeBytes("Content-Disposition: form-data; name=\"" + attachmentName + "\";filename=\""
                + attachmentFileName + "\"" + crlf);
        request.writeBytes("Content-Type: application/pdf");
        request.writeBytes(crlf);
        System.out.println(conn.getResponseCode());
    } catch (Exception e) {
        throw new RuntimeException(e);
    }

我在代码中以及网络服务器上发现了一些问题。我写了一个新的方法，现在服务器响应400。

任何人都可以帮助我吗？

Answer 1

我自己发现了。

这里是代码：

public void form_test() {
    try {
        url = new URL("http://localhost:9000/resource/frl:6376984/data");
        httpCon = (HttpURLConnection) url.openConnection();
        String userpass = user + ":" + password;
        basicAuth = "Basic " + new String(new Base64().encode(userpass.getBytes()));
        httpCon.setRequestProperty("Authorization", basicAuth);
        String fieldName = "data";
        File uploadFile = new File("/home/raul/test/frl%3A6376984/6376990.pdf");
        String boundary = "" + System.currentTimeMillis() + "";

        httpCon.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
        httpCon.setRequestProperty("file", "6376986.pdf");

        httpCon.setUseCaches(false);
        httpCon.setDoOutput(true);
        httpCon.setDoInput(true);

        httpCon.setRequestMethod("PUT");

        OutputStream outputStream = null;
        try {
            outputStream = (httpCon.getOutputStream());
        } catch (IOException e) {
            e.printStackTrace();
        }
        PrintWriter writer = null;
        try {
            writer = new PrintWriter(new OutputStreamWriter(outputStream, "UTF-8"), true);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        String LINE_FEED = "\r\n";
        String fileName = uploadFile.getName();
        writer.append("--" + boundary).append(LINE_FEED);
        writer.append("Content-Disposition: form-data; name=\"" + fieldName + "\"; filename=\"" + fileName + "\"")
                .append(LINE_FEED);
        writer.append("Content-Type: " + URLConnection.guessContentTypeFromName(fileName)).append(LINE_FEED);
        writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
        System.out.println("Content-Transfer-Encoding: binary" + (LINE_FEED));
        writer.append(LINE_FEED);

        writer.flush();

        fileToOutputStream(uploadFile, outputStream);
        try {
            outputStream.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }

        writer.append(LINE_FEED);
        writer.flush();
        writer.close();
        httpCon.disconnect();

        try {
            System.out.println(httpCon.getResponseCode());
            System.out.println(httpCon.getResponseMessage());
        } catch (IOException e) {
            e.printStackTrace();
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
}

第一个错误是边界字符串开头的字符“=”。似乎我的Web服务器在边界字段中不喜欢这么多等号，所以我在这里设置了一个：

httpCon.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);

并从字符串边界

中删除它们

String boundary = "" + System.currentTimeMillis() + "";

当我尝试上传文件时，我在Wireshark和Java中的响应代码400中也收到一些错误消息“数据包大小超出限制”但现在使用此方法它可以正常工作。谢谢你们的支持和建议。

上传多表格数据

1 个答案: