Java Http将请求放入jpeg

我收到了类似以下内容的HTTP文件：

PUT /photo HTTP/1.1
X-Apple-AssetKey: F92F9B91-954E-4D63-BB9A-EEC771ADE6E8
X-Apple-Transition: Dissolve
Content-Length: 462848
User-Agent: MediaControl/1.0
X-Apple-Session-ID: 1bd6ceeb-fffd-456c-a09c-996053a7a08c

<HERE COMES THE JPEG DATA>

---

所以我的想法是用BufferedReader去掉标题，然后读取剩余的（包含jpeg的）InputStream，但我猜BufferedReader不会影响InputStream的偏移量。那么我如何跳过标题并编写jpeg呢

我不建议这样做*，但是如果你真的喜欢用低级的方式，HTTP头部分总是以字符序列

“\r\n\r\n”

结尾（

\r\n

在规范中被称为CRLF）。如果有疑问，请仔细阅读

您只需搜索以下模式：

byte[] endOfHeader = "\r\n\r\n".getBytes(); // alt: getBytes(Charset.forName("ASCII"))

int endIndex = 0;
BufferedInputStream input = new BufferedInputStream(s.getInputStream());
input mark();

try {
    int read;
    while ((read = input.read()) != -1) {
        if (the last four bytes match endOfHeader) { // Left as an exercise ;-)
            break;
        }

        endIndex++;
    }
}
finally {
    input.reset();
}

// Now you have the end of header in endIndex
// You now have to re-read the header part using a character Reader 
// (BufferedReader is fine, just make sure you have the correct encoding)
// but make sure read *exactly* until endIndex before attempting to read further.

// The rest of input can now be read using ImageIO or similar, as you like.

// PS: Don't forget that the content may be chunked or zipped during 
//     transfer-encoding. You might need to handle this, unless you also
//     control the client sending the PUT request.
// PPS: I told you wouldn't recommend this ;-)

---

---

*)我首选的方法是使用嵌入式Jetty实例，并创建servlet来处理PUT。通过最少的设置和配置，它启动得非常快。这听起来可能有些过分，但我认为，从长远来看，这会给你自己带来一些痛苦。

你真的需要编写底层套接字来使用HTTP吗？为什么不使用一个已经解决了这个问题的现有servlet容器（如Tomcat或Jetty）呢？对于这个简单的任务来说，这是一个过度的任务。@KanakSony也许。。关于这个答案你有什么问题吗？否则，您可能应该问一个单独的问题。实际上，我得到的图像的内容长度与图像的实际大小不同。我不知道为什么图像大小会增加。里面还加了什么？我怎么知道呢？@KanakSony这些不是关于这个答案的评论。相反，你应该编辑自己的问题以吸引更多的注意力。

byte[] endOfHeader = "\r\n\r\n".getBytes(); // alt: getBytes(Charset.forName("ASCII"))

int endIndex = 0;
BufferedInputStream input = new BufferedInputStream(s.getInputStream());
input mark();

try {
    int read;
    while ((read = input.read()) != -1) {
        if (the last four bytes match endOfHeader) { // Left as an exercise ;-)
            break;
        }

        endIndex++;
    }
}
finally {
    input.reset();
}

// Now you have the end of header in endIndex
// You now have to re-read the header part using a character Reader 
// (BufferedReader is fine, just make sure you have the correct encoding)
// but make sure read *exactly* until endIndex before attempting to read further.

// The rest of input can now be read using ImageIO or similar, as you like.

// PS: Don't forget that the content may be chunked or zipped during 
//     transfer-encoding. You might need to handle this, unless you also
//     control the client sending the PUT request.
// PPS: I told you wouldn't recommend this ;-)