获取充分，原始的HTTP请求会从HttpPost发送消息

本文介绍了获取充分，原始的HTTP请求会从HttpPost发送消息的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想建立一个原始的HTTP POST请求。我不想真正连接到服务器并发送邮件，但是。

我一直在打探将Apache HTTP库，希望我能创造一个HttpPost对象，设置实体，然后抓住它会创建消息。到目前为止，我可以转储实体，而不是整个请求，因为它会出现在服务器侧

任何想法？除了刚刚重新创建轮，当然。

解决方案

我重构ShyJ的反应成一对静态类的，但是原始响应工作得很好。这里有两个类：

公共静态最后一类LoopbackPostMethod扩展的PostMethod {    私有静态最后弦乐STATUS_LINE =HTTP / 1.1 200 OK;    @覆盖    保护无效readResponse（州的HttpState，康涅狄格州的HttpConnection）抛出IOException异常，HttpException {        状态行=新的状态行（STATUS_LINE）;    }}公共静态最后一类LoopbackHttpConnection扩展的HttpConnection {    私有静态最后弦乐HOST =127.0.0.1;    私有静态最终诠释PORT = 80;    私人最终的OutputStream fOutputStream;    公共LoopbackHttpConnection（OutputStream中的OutputStream）{        超（主机，端口）;        fOutputStream =的OutputStream;    }    @覆盖    公共无效flushRequestOutputStream（）抛出IOException异常{/ *什么也不做* /}    @覆盖    公众的OutputStream getRequestOutputStream（）抛出IOException异常，IllegalStateException异常{        返回fOutputStream;    }    @覆盖    公共无效写入（字节[]数据）抛出IOException异常，IllegalStateException异常{        fOutputStream.write（数据）;    }}

下面是工厂方法，我使用了我自己的实现，作为一个例子：

私人的ByteBuffer createHtt prequest（ByteBuffer的数据）抛出HttpException，IOException异常{    LoopbackPostMethod的PostMethod =新LoopbackPostMethod（）;    最后ByteArrayOutputStream的OutputStream =新ByteArrayOutputStream（）;    postMethod.setRequestEntity（新ByteArrayRequestEntity（data.array（）））;    postMethod.execute（新的HttpState（），新LoopbackHttpConnection（OutputStream中））;    字节[]字节= outputStream.toByteArray（）;    ByteBuffer的缓冲= ByteBuffer.allocate（bytes.length）;    buffer.put（字节）;    返回缓冲区;}

解决方案

这可以和 achived HTTP客户端，并伪造一些方法。我用的 3.1 版本 HTTP客户端。

的示例的

这code：

进口java.io.ByteArrayOutputStream中;进口java.io.IOException异常;进口java.io.OutputStream中;进口org.apachemons.httpclient.HttpConnection;进口org.apachemons.httpclient.HttpException;进口org.apachemons.httpclient.HttpState;进口org.apachemons.httpclient.StatusLine;进口org.apachemons.httpclient.methods.PostMethod;公共类主要{    公共静态无效的主要（字串[] args）抛出异常{        最后ByteArrayOutputStream BAOS =新ByteArrayOutputStream（）;        的PostMethod方法=新的PostMethod（）{            @覆盖            保护无效readResponse（州的HttpState，康涅狄格州的HttpConnection）                    抛出IOException异常，HttpException {                状态行=新状态行（HTTP / 1.1 200 OK）;            }        };        method.addParameter（AA，B）;        method.execute（新的HttpState（），新的HttpConnection（www.google.abc/hi，80）{            @覆盖            公共无效flushRequestOutputStream（）抛出IOException            }            @覆盖            公众的OutputStream getRequestOutputStream（）抛出IOException异常，                    IllegalStateException异常{                返回BAOS;            }            @覆盖            公共无效写入（字节[]数据）抛出IOException异常，                    IllegalStateException异常{                baos.write（数据）;            }        }）;        最后弦乐postBody =新的String（baos.toByteArray（））;        的System.out.println（postBody）;    }}

将返回

POST / HTTP / 1.1用户代理：Jakarta Commons的-的HttpClient / 3.1主持人：www.google.abc/hi内容长度：4内容类型：应用程序/ x-WWW的形式urlen codeDAA = B

I'm trying to build a raw HTTP POST request. I don't want to actually connect to the server and send the message, however.

I've been poking around the Apache HTTP libraries, hoping that I could just create an HttpPost object, set the entity, and then grab the message that it would have created. So far, I can dump the entity, but not the entire request as it'd appear on the server-side.

Any ideas? Aside from just re-creating the wheel, of course.

Solution

I refactored ShyJ's response into a pair of static classes, however the original response works just fine. Here are the two classes:

public static final class LoopbackPostMethod extends PostMethod { private static final String STATUS_LINE = "HTTP/1.1 200 OK"; @Override protected void readResponse(HttpState state, HttpConnection conn) throws IOException, HttpException { statusLine = new StatusLine (STATUS_LINE); } } public static final class LoopbackHttpConnection extends HttpConnection { private static final String HOST = "127.0.0.1"; private static final int PORT = 80; private final OutputStream fOutputStream; public LoopbackHttpConnection(OutputStream outputStream) { super(HOST, PORT); fOutputStream = outputStream; } @Override public void flushRequestOutputStream() throws IOException { /* do nothing */ } @Override public OutputStream getRequestOutputStream() throws IOException, IllegalStateException { return fOutputStream; } @Override public void write(byte[] data) throws IOException, IllegalStateException { fOutputStream.write(data); } }

Here's the factory method that I'm using for my own implementation, as an example:

private ByteBuffer createHttpRequest(ByteBuffer data) throws HttpException, IOException { LoopbackPostMethod postMethod = new LoopbackPostMethod(); final ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); postMethod.setRequestEntity(new ByteArrayRequestEntity(data.array())); postMethod.execute(new HttpState(), new LoopbackHttpConnection(outputStream)); byte[] bytes = outputStream.toByteArray(); ByteBuffer buffer = ByteBuffer.allocate(bytes.length); buffer.put(bytes); return buffer; }

解决方案

This can be achived with http-client and faking some methods. I used the 3.1 version of http-client.

Example

This code:

import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.OutputStream; import org.apachemons.httpclient.HttpConnection; import org.apachemons.httpclient.HttpException; import org.apachemons.httpclient.HttpState; import org.apachemons.httpclient.StatusLine; import org.apachemons.httpclient.methods.PostMethod; public class Main { public static void main(String[] args) throws Exception { final ByteArrayOutputStream baos = new ByteArrayOutputStream(); PostMethod method = new PostMethod () { @Override protected void readResponse(HttpState state, HttpConnection conn) throws IOException, HttpException { statusLine = new StatusLine ("HTTP/1.1 200 OK"); } }; method.addParameter("aa", "b"); method.execute(new HttpState (), new HttpConnection("www.google.abc/hi", 80) { @Override public void flushRequestOutputStream() throws IOException { } @Override public OutputStream getRequestOutputStream() throws IOException, IllegalStateException { return baos; } @Override public void write(byte[] data) throws IOException, IllegalStateException { baos.write(data); } }); final String postBody = new String (baos.toByteArray()); System.out.println(postBody); } }

will return

POST / HTTP/1.1 User-Agent: Jakarta Commons-HttpClient/3.1 Host: www.google.abc/hi Content-Length: 4 Content-Type: application/x-www-form-urlencoded aa=b