Java HTTPSurl连接和接线柱
不久前,我用python编写了这个程序,它使用https登录网站,获取一些信息并注销。 程序非常简单:Java HTTPSurl连接和接线柱,java,python,Java,Python,不久前,我用python编写了这个程序,它使用https登录网站,获取一些信息并注销。 程序非常简单: class Richiesta(object): def __init__(self,url,data): self.url = url self.data = "" self.content = "" for k, v in data.iteritems(): self.data += str(k)+"="+str(v)+"&"
class Richiesta(object):
def __init__(self,url,data):
self.url = url
self.data = ""
self.content = ""
for k, v in data.iteritems():
self.data += str(k)+"="+str(v)+"&"
if(self.data == ""):
self.req = urllib2.Request(self.url)
else:
self.req = urllib2.Request(self.url,self.data)
self.req.add_header('User-Agent', 'Mozilla/5.0 (Windows NT 5.1; rv:2.0b6) Gecko/20100101 Firefox/4.0b6')
self.req.add_header('Referer', baseurl+'/www/')
self.req.add_header('Cookie', cookie )
def leggi(self):
while(self.content == ""):
try:
r = urllib2.urlopen(self.req)
except urllib2.HTTPError, e:
print("Errore del server, nuovo tentativo tra 15 secondi")
time.sleep(15)
except urllib2.URLError, e:
print("Problema di rete, proverò a riconnettermi tra 20 secondi")
time.sleep(20)
else:
self.content = r.read().decode('utf-8')
def login(username,password):
global cookie
print("Inizio la procedura di login")
url = "https://example.com/auth/Authenticate"
data = {"login":"1","username":username,"password":password}
f = Richiesta(url,data)
f.leggi()
现在,出于某种原因,我必须用java翻译它。直到现在,这是我写的:
import java.net.*;
import java.security.Security.*;
import java.io.*;
import javax.net.ssl.*;
public class SafeReq {
String baseurl = "http://www.example.com";
String useragent = "Mozilla/5.0 (Windows NT 5.1; rv:2.0b6) Gecko/20100101 Firefox/4.0b6";
String content = "";
public SafeReq(String s, String sid, String data) throws MalformedURLException {
try{
URL url = new URL(s);
HttpsURLConnection request = ( HttpsURLConnection ) url.openConnection();
request.setUseCaches(false);
request.setDoOutput(true);
request.setDoInput(true);
request.setFollowRedirects(true);
request.setInstanceFollowRedirects(true);
request.setRequestProperty("User-Agent",useragent);
request.setRequestProperty("Referer","http://www.example.com/www/");
request.setRequestProperty("Cookie","sid="+sid);
request.setRequestProperty("Origin","http://www.example.com");
request.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
request.setRequestProperty("Content-length",String.valueOf(data.length()));
request.setRequestMethod("POST");
OutputStreamWriter post = new OutputStreamWriter(request.getOutputStream());
post.write(data);
post.flush();
BufferedReader in = new BufferedReader(new InputStreamReader(request.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
content += inputLine;
}
post.close();
in.close();
} catch (IOException e){
e.printStackTrace();
}
}
public String leggi(){
return content;
}
}
问题是,登录不起作用,当我尝试获取需要登录的页面时,会收到“再次登录”消息。
这两门课似乎完全一样,我不明白为什么我不能让第二门课开始工作。。。你知道吗?你从哪里得到你的
sid
?从症状来看,我猜您的会话cookie没有正确地传递到服务器
有关可能的解决方案,请参阅此问题:
一般来说,我建议您使用在Java中实现HTTP对话(任何比简单的一次性GET或POST更复杂的方法)。请参阅(我想“基于表单的登录”的示例适用于您的情况)。如果将来有人想了解这一点,请查看
HtmlUnit
。
这是一个很好的例子。我自己解决了这个问题。问题在于request.setFollowRedirects()的错误;强制httpurlconnection遵循重定向,但忘记发送cookie。我将followredirects设置为false,获取位置头并发出第二个请求。这就像一个符咒:)