Got -1 from HttpURLConnection getResponseCode()

In my code I use

mHttpConnRespCode = mConnection.getResponseCode();

to get http response code,开发者_运维知识库 where mConnection is HttpURLConnection type.

Sometimes I got -1 as response code. Under what circumstances, mConnection.getResponseCode() returns -1?

Thanks.

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You get -1 when there is no Status Code available. For example, this will happen in following scenarios,

1. Response is not received yet.
2. Response is not valid HTTP response.