我正在尝试从以下位置获取PDF文件:
网址:https:// domain_name/xyz/_id/download /
其中它不指向直接pdf文件,并且下载每个唯一文件来解释特定的<_id>字段.
我把这个链接放在浏览器的地址栏中,然后立即下载Pdf文件,而当我尝试通过HTTPsURLConnection获取它时,它的Content-Type是'text/html'形式,而它应该是'application/pdf' .
在连接之前我还尝试'setRequestProperty'为'application/pdf',但文件总是以'text/html'形式下载.
我用它的方法是'GET'
1)我是否需要使用HttpClient而不是HttpsURLConnection?
2)这些类型的链接是否用于增加安全性?
3)请指出我的错误.
4)我怎么知道服务器上的文件名?
我粘贴在我实施的主要代码之下:
URL url = new URL(sb.toString());
//created new connection
HttpsURLConnection urlConnection = (HttpsURLConnection) url.openConnection();
//have set the request method and property
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.setRequestProperty("Content-Type", "application/pdf");
Log.e("Content Type--->", urlConnection.getContentType()+" "+ urlConnection.getResponseCode()+" "+ urlConnection.getResponseMessage()+" "+urlConnection.getHeaderField("Content-Type"));
//and connecting!
urlConnection.connect();
//setting the path where we want to save the file
//in this case, going to save it on the root directory of the
//sd card.
File SDCardRoot = Environment.getExternalStorageDirectory();
//created …Run Code Online (Sandbox Code Playgroud)