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    <p>The response to my HTTP request returned with a status code 404, which resulted in a FileNotFoundException when I called getInputStream(). I still wanted to read the response body, so I had to use a different method: <strong>HttpURLConnection#getErrorStream()</strong>.</p> <p>Here's a JavaDoc snippet of getErrorStream():</p> <blockquote> <p>Returns the error stream if the connection failed but the server sent useful data nonetheless. The typical example is when an HTTP server responds with a 404, which will cause a FileNotFoundException to be thrown in connect, but the server sent an HTML help page with suggestions as to what to do.</p> </blockquote> <p>Usage example:</p> <pre><code>public static String httpGet(String url) { HttpURLConnection con = null; InputStream is = null; try { con = (HttpURLConnection) new URL(url).openConnection(); con.connect(); //4xx: client error, 5xx: server error. See: http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html. boolean isError = con.getResponseCode() &gt;= 400; //In HTTP error cases, HttpURLConnection only gives you the input stream via #getErrorStream(). is = isError ? con.getErrorStream() : con.getInputStream(); String contentEncoding = con.getContentEncoding() != null ? con.getContentEncoding() : "UTF-8"; return IOUtils.toString(is, contentEncoding); //Apache Commons IO } catch (Exception e) { throw new IllegalStateException(e); } finally { //Note: Closing the InputStream manually may be unnecessary, depending on the implementation of HttpURLConnection#disconnect(). Sun/Oracle's implementation does close it for you in said method. if (is != null) { try { is.close(); } catch (IOException e) { throw new IllegalStateException(e); } } if (con != null) { con.disconnect(); } } } </code></pre>
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    1. COthis was helpful, but it's just a vague 400 error page. I'm using https://graph.facebook.com/me/photos and in the browser it works unless you try to view the headers via the web developer addon. So it seems the inputstream is creating a new request somehow, which makes no sense...more time to figure that one out...thanks for the geterrorstream tip though.
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