java HttpURLConnection请求被两次命中到服务器以下载文件
下面是我从服务器下载文件的安卓代码
private String executeMultipart_download(String uri, String filepath)
throws SocketTimeoutException, IOException {
int count;
System.setProperty("http.keepAlive", "false");
// uri="https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTzoeDGx78aM1InBnPLNb1209jyc2Ck0cRG9x113SalI9FsPiMXyrts4fdU";
URL url = new URL(uri);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.connect();
int lenghtOfFile = connection.getContentLength();
Log.d("File Download", "Lenght of file: " + lenghtOfFile);
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(filepath);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
httpStatus = connection.getResponseCode();
String statusMessage = connection.getResponseMessage();
connection.disconnect();
return statusMessage;
}
我已经调试了这段代码。此函数只调用一次,即使它两次命中服务器。 这段代码中有任何错误
谢谢
# 1 楼答案
您的错误在于这一行:
如果我们转到grepcode以查看此函数的源代码,那么我们将看到:
但你已经打开了连接,所以你打开了两次连接
作为解决方案,您需要将
url.openStream()
替换为connection.getInputStream()
因此,你被剪断的遗嘱看起来像: