文件下载器中的基本访问身份验证问题

Question

我在从我的应用程序从互联网下载二进制文件(zip文件)时遇到问题.我必须使用基本访问身份验证来授权访问文件,但服务器响应始终是HTTP/1.0 400错误请求.

String authentication = this._login+":"+this._pass;
String encoding = Base64.encodeToString(authentication.getBytes(), 0);            

String fileName = "data.zip";
URL url = new URL("http://10.0.2.2/androidapp/data.zip"); 

HttpURLConnection ucon = (HttpURLConnection) url.openConnection();

ucon.setRequestMethod("GET");
ucon.setDoOutput(true);

ucon.setRequestProperty ("Authorization", "Basic " + encoding);
ucon.connect();

/*
 * Define InputStreams to read from the URLConnection.
 */
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);

/*
 * Read bytes to the Buffer until there is nothing more to read(-1).
 */
ByteArrayBuffer bab = new ByteArrayBuffer(50);
int current = 0;
while ((current = bis.read()) != -1) {
    bab.append((byte) current);
}

bis.close();

/* Convert the Bytes read to a String. */
FileOutputStream fos = this._context.openFileOutput(fileName, this._context.MODE_WORLD_READABLE);
fos.write(bab.toByteArray());
fos.close();

它可能是由密码中的空格引起的吗？

Answer 1

我可能有点晚了,但我遇到了类似的问题.问题在于以下几行:

String encoding = Base64.encodeToString(authentication.getBytes(), 0);

如果您将该行更改为这样,它应该工作:

String encoding = Base64.encodeToString(authentication.getBytes(), Base64.NO_WRAP);

默认情况下,Android Base64 util会在编码字符串的末尾添加换行符.这会使HTTP标头无效并导致"错误请求".

Base64.NO_WRAP标志告诉util创建没有换行符的编码字符串,从而保持HTTP头不变.