如前所述，某些托管服务商使用诸如UserAgent之类的标头来防止这种入侵：
这不起作用：
val urls = """http://blog.zenika.com/themes/Zenika/img/zenika.gif"""
val url = new URL(urls)
val urlConnection = url.openConnection()
val inputStream = urlConnection.getInputStream()
val bufferedReader = new BufferedReader(new InputStreamReader(inputStream))
这有效：
val urls = """http://blog.zenika.com/themes/Zenika/img/zenika.gif"""
val url = new URL(urls)
val urlConnection = url.openConnection()
urlConnection.setRequestProperty("User-Agent", """NING/1.0""")
val inputStream = urlConnection.getInputStream()
val bufferedReader = new BufferedReader(new InputStreamReader(inputStream))
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