WebResourceResponse can't read full inputstream from HttpConnection (Android)

问题

I'm working with an ionic application(like hybrid) which can play some videos.I want to add some headers to the request so that I override the "shouldInterceptRequest".

URL myUrl = new URL(real);
HttpURLConnection connection = (HttpURLConnection) myUrl.openConnection();
for (Map.Entry < String, String > entry: headers.entrySet()) {
  connection.setRequestProperty(entry.getKey(), entry.getValue());
}
InputStream in = connection.getInputStream();
WebResourceResponse response = new WebResourceResponse("video/mp4", "UTF-8", in );
for (Map.Entry < String, List < String >> entry: connection.getHeaderFields().entrySet()) {
  resHeaders.put(entry.getKey(), entry.getValue().get(0));
}

This code can't work.The video tag in html can't play the video. So I add some code.

byte[] bytes = new byte[30 * 1024 * 1024];
ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
int len = 0;
while ((len = in.read(bytes)) != -1) {
  byteBuffer.write(bytes, 0, len);
}
bytes = byteBuffer.toByteArray();
WebResourceResponse response = new WebResourceResponse("video/mp4", "UTF-8", new ByteArrayInputStream(bytes));

When I read inputstream into bytes and send bytes to WebResourceResponse, the video can be play.However it means my application will use lots of memory if the video is large.

So that, I want to know is there any way to play the video without saving inputstream into bytes.

回答1:

OK.Fianlly,I found my way. Actually, my goal is to add custom headers to resource request and now I found there is an easier way to do it. For example, if I want to load a image,I will use img tag like this,<img src="the_url_of_image">,and I can't add any header to the request unless I interecept the request. However,we can use blob now.We can request the resource by using something like ajax and use createObjectURL to create a url links to the resource.

来源：https://stackoverflow.com/questions/53332992/webresourceresponse-cant-read-full-inputstream-from-httpconnection-android