Question

我想让我的Android应用跟踪自己的数据使用情况。我可以获得HTTP响应的Content-Length，但是在发出请求之前我找不到如何获取请求的大小。所有请求（GET，POST，PUT等）都是HttpUriRequest。

的实例

由于

Answer 1

所有带内容的请求都应该是HttpEntityEnclosingRequestBase的子类。

HttpUriRequest req = ...;
long length = -1L;
if (req instanceof HttpEntityEnclosingRequestBase) {
    HttpEntityEnclosingRequestBase entityReq = (HttpEntityEnclosingRequestBase) req;
    HttpEntity entity = entityReq.getEntity();
    if (entity != null) {
        // If the length is known (i.e. this is not a streaming/chunked entity)
        // this method will return a non-negative value.
        length = entity.getContentLength();
    }
}

if (length > -1L) {
    // This is the Content-Length. Some cases (streaming/chunked) doesn't
    // know the length until the request has been sent however.
}

Answer 2

HttpUriRequest类继承自HttpRequest类，该类具有名为getRequestLine()的方法。您可以调用此函数并调用toString()方法，然后调用length()函数来查找请求的长度。

示例：

HttpUriRequest req = ...;
int reqLength = req.getRequestLine().toString().length());

这将为您提供请求的String表示的长度。

有没有办法在Android / Java发送之前获取HttpUriRequest的Content-Length？

2 个答案: