文件下载器中的基本访问身份验证问题 [英] Problem with basic access authentication in file downloader

问题描述

我在从互联网下载应用程序中的二进制文件(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.

I'm having problems with downloading binary file (zip file) in my app from te internet. I have to use basic access authentication to authorize acces to file, but server response is always HTTP/1.0 400 Bad request.

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();

会不会是密码中的空格引起的?

Could it be caused by whitespaces in password?

推荐答案

我可能有点晚了，但我刚刚遇到了类似的问题.问题在于以下几行:

I might be a bit late but I just came across a similar problem. The problem lies in the following line:

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

如果您将该行更改为如下所示，它应该可以工作:

If you change that line to look like this it should work:

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

默认情况下，Android Base64 实用程序会在编码字符串的末尾添加一个换行符.这会使 HTTP 标头无效并导致错误请求".

By default the Android Base64 util adds a newline character to the end of the encoded string. This invalidates the HTTP headers and causes the "Bad request".

Base64.NO_WRAP 标志告诉实用程序创建没有换行符的编码字符串，从而保持 HTTP 标头完整.

The Base64.NO_WRAP flag tells the util to create the encoded string without the newline character thus keeping the HTTP headers intact.

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