在 Java 中获取 HTTP 响应的大小

发布于 2024-08-10 20:45:12 字数 383 浏览 9 评论 0原文

我想知道响应某个 http 请求发送了多少数据。我目前所做的是：

   HttpURLConnection con = (HttpURLConnection) feedurl.openConnection();

//检查内容大小的响应 int feedsize = con.getContentLength();

问题是，内容长度并不总是被设置。例如，当服务器使用transfer-encoding=chunked 时，我得到的值为-1。

我不需要需要它来显示进度信息。我只需要知道完成后发送给我的数据的大小。

背景：我需要此信息，因为我想将其与使用 gzip 编码发送的响应的大小进行比较。

原文

I would like to know how much data was sent in response to a certain http-request.
What I currently do is this:

   HttpURLConnection con = (HttpURLConnection) feedurl.openConnection();

//check the response for the content-size
int feedsize = con.getContentLength();

The problem is, that content-legnth is not always set. E.g. when the server uses transfer-encoding=chunked I get back a value of -1.

I do not need this to display progress information. I just need to know the size of the data that was sent to me after it has been done.

Background: I need this information because I would like to compare it to the size of a response, that was sent using gzip encoding.

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沫雨熙 2024-08-17 20:45:13

我会使用 commons-io CountingInputStream，这将为您完成这项工作。一个完整但琐碎的例子：

public long countContent(URL feedurl) {
  CountingInputStream counter = null;
  try {
     HttpURLConnection con = (HttpURLConnection) feedurl.openConnection();
     counter = new CountingInputStream(con.getInputStream());
     String output = IOUtils.toString(counter);
     return counter.getByteCount();
  } catch (IOException ex) {
     throw new RuntimeException(ex);
  } finally {
     IOUtils.closeQuietly(counter);
  }
}

I'd use a commons-io CountingInputStream, which would do the job for you. A full but trivial example:

public long countContent(URL feedurl) {
  CountingInputStream counter = null;
  try {
     HttpURLConnection con = (HttpURLConnection) feedurl.openConnection();
     counter = new CountingInputStream(con.getInputStream());
     String output = IOUtils.toString(counter);
     return counter.getByteCount();
  } catch (IOException ex) {
     throw new RuntimeException(ex);
  } finally {
     IOUtils.closeQuietly(counter);
  }
}

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