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GetContentLength () returns -1 only in WiFi?

I want to know the file length, so I tried getContentLength(). It works fine with network connectivity (edge ​​/ 3g), but returns -1 with WiFi?
What for? Wi-fi is good and the file was found, it can be downloaded, but the return is getContentLength()always "-1". I do not understand. file- google docs file.
Is there any other way to get the length?

My code is:

URL url = new URL(file);

URLConnection conexion = url.openConnection();

conexion.connect();

int poids = conexion.getContentLength();
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2 answers

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+1

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+1

Source: https://habr.com/ru/post/1758276/

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