Question

我正在请求：

http://www.baseaddress.com/path/index1.html

根据我发送的论据，我正在重定向到这两个中的一个： http://www.baseaddress.com/path2/
要么 http://www.baseaddress.com/path/index2.html

问题是响应仅返回： index2.html或/path2/

现在我检查第一个char是否为/，并根据此连接URL。有没有一个简单的方法来做这个没有字符串检查？

代码：

url = new URL("http://www.baseaddress.com/path/index1.php");
con = (HttpURLConnection) url.openConnection();
... some settings
in = con.getInputStream();
redLoc = con.getHeaderField("Location"); // returns "index2.html" or "/path2/"
if(redLoc.startsWith("/")){
  url = new URL("http://www.baseaddress.com" + redLoc);
}else{
  url = new URL("http://www.baseaddress.com/path/" + redLoc);
}

你认为这是最好的方法吗？

Answer 1

您可以使用java.net.URI.resolve来确定重定向的绝对网址。

java.net.URI uri = new java.net.URI ("http://www.baseaddress.com/path/index1.html");
System.out.println (uri.resolve ("index2.html"));
System.out.println (uri.resolve ("/path2/"));

输出

http://www.baseaddress.com/path/index2.html
http://www.baseaddress.com/path2/

Answer 2

if(!url.contains("index2.html"))
{
   url = url+"index2.html";
}

Answer 3

您可以使用Java类URI函数resolve来合并这些URI。

public String mergePaths(String oldPath, String newPath) {
    try {
        URI oldUri = new URI(oldPath);
        URI resolved = oldUri.resolve(newPath);
        return resolved.toString();
    } catch (URISyntaxException e) {
        return oldPath;
    }
}

示例：

System.out.println(mergePaths("http://www.baseaddress.com/path/index.html", "/path2/"));
System.out.println(mergePaths("http://www.baseaddress.com/path/index.html", "index2.html"));

将输出：

http://www.baseaddress.com/path2/
http://www.baseaddress.com/path/index2.html

如何在URL重定向时将路径连接到基本URL？

3 个答案: