从输入流解析多部分/表单数据的库和示例 [英] Library and examples of parsing multipart/form-data from inputstream

问题描述

对我发送的一种 HTTP 请求的响应是一个 multipart/form-data 看起来像:

The response to one kind of HTTP request I send is a multipart/form-data looks something like:

--------boundary123
Content-Disposition: form-data; name="json"
Content-Type: application/json

{"some":"json"}
--------boundary123
Content-Disposition: form-data; name="bin"
Content-Type: application/octet-stream

<file data>

--------boundary123

我一直在使用 apache 来发送和接收 HTTP 请求，但我似乎找不到一种简单的方法来使用它来解析上述内容以便轻松访问表单字段.

I've been using apache to send and receive the HTTP requests, but I can't seem to find an easy way to use it to parse the above for easy access of the form fields.

我不想重新发明轮子，所以我正在寻找一个可以让我做类似以下事情的库:

I would prefer not to reinvent the wheel, so I'm looking for a library that allows me to do something similar to:

MultipartEntity multipart = new MultipartEntity(inputStream);
InputStream bin = multipart.get("bin");

有什么建议吗?

推荐答案

使用弃用构造函数的示例代码:

Example code using deprecated constructor:

import java.io.ByteArrayInputStream;

import org.apache.commons.fileupload.MultipartStream;

public class MultipartTest {

    // Lines should end with CRLF
    public static final String MULTIPART_BODY =
            "Content-Type: multipart/form-data; boundary=--AaB03x
"
            + "
"
            + "----AaB03x
"
            + "Content-Disposition: form-data; name="submit-name"
"
            + "
"
            + "Larry
"
            + "----AaB03x
"
            + "Content-Disposition: form-data; name="files"; filename="file1.txt"
"
            + "Content-Type: text/plain
"
            + "
"
            + "HELLO WORLD!
"
            + "----AaB03x--
";

    public static void main(String[] args) throws Exception {

        byte[] boundary = "--AaB03x".getBytes();

        ByteArrayInputStream content = new ByteArrayInputStream(MULTIPART_BODY.getBytes());

        @SuppressWarnings("deprecation")
        MultipartStream multipartStream =
                new MultipartStream(content, boundary);

        boolean nextPart = multipartStream.skipPreamble();
        while (nextPart) {
            String header = multipartStream.readHeaders();
            System.out.println("");
            System.out.println("Headers:");
            System.out.println(header);
            System.out.println("Body:");
            multipartStream.readBodyData(System.out);
            System.out.println("");
            nextPart = multipartStream.readBoundary();
        }
    }
}

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