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我正在嘗試使用我在使用HttpClient 4.0.3的回覆帖子的方法中收到的Cookie;HttpClient 4.x如何使用cookies？
這裏是我的代碼：
public void generateRequest()
{
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://mysite.com/login");
httpclient.getParams().setParameter("http.useragent", "Custom Browser");
httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION,
HttpVersion.HTTP_1_1);
httpclient.getParams().setParameter(ClientPNames.COOKIE_POLICY,
CookiePolicy.BROWSER_COMPATIBILITY);
CookieStore cookieStore = new BasicCookieStore();
HttpContext localContext = new BasicHttpContext();
localContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);
try
{
LOG.info("Status Code: sending");
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("email", "john%40gmail.com"));
nameValuePairs.add(new BasicNameValuePair("password", "mypassword"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
httppost.setHeader("ContentType", "application/x-www-form-urlencoded");
HttpResponse response = httpclient.execute(httppost, localContext);
HttpEntity entity = response.getEntity();
if (entity != null)
{
entity.consumeContent();
}
iterateCookies(httpclient);
}
catch (ClientProtocolException e)
{
LOG.error("ClientProtocolException", e);
}
catch (IOException e)
{
LOG.error("IOException", e);
}
}
private void iterateCookies(DefaultHttpClient httpclient)
{
List<Cookie> cookies = httpclient.getCookieStore().getCookies();
if (cookies.isEmpty())
{
System.out.println("No cookies");
}
else
{
for (Cookie c : cookies)
{
System.out.println("-" + c.toString());
}
}
}
但我不斷收到No cookies註銷，即使當我使用web-sniffer.net，我得到這樣的迴應：
Status: HTTP/1.1 302 Found
Cache-Control: private, no-store
Content-Type: text/html; charset=utf-8
Location: http://www.mysite.com/loginok.html
Server: Microsoft-IIS/7.0
X-AspNet-Version: 2.0.50727
Set-Cookie: USER=DDA5FF4E1C30661EC61CFA; domain=.mysite.com; expires=Tue, 08-Jan-2013 18:39:53 GMT; path=/
Set-Cookie: LOGIN=D6CC13A23DCF56AF81CFAF; domain=.mysite.com; path=/ Date: Mon, 09 Jan 2012 18:39:53 GMT
Connection: close
Content-Length: 165
所有的例子我在網上發現，任何類型的意義都可以參考HttpClient 3.x，您可以將CookiePolicy設置爲IGNORE，並手動處理Set-Cookie標題。我不明白爲什麼在4.x這很困難。由於多種原因，我需要訪問USER散列。任何人都可以告訴我如何在地獄我可以訪問它？
UPDATE
我發現以下C#代碼做同樣的事情，並正常工作。
private static string TryGetCookie(string user, string pass, string baseurl)
{
string body = string.Format("email={0}&password={1}", user, pass);
byte[] bodyData = StringUtils.StringToASCIIBytes(body);
HttpWebRequest req = WebRequest.Create(baseurl) as HttpWebRequest;
if (null != req.Proxy)
{
req.Proxy.Credentials = CredentialCache.DefaultCredentials;
}
req.AllowAutoRedirect = false;
req.Method = "Post";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = bodyData.Length;
using (Stream reqBody = req.GetRequestStream())
{
reqBody.Write(bodyData, 0, bodyData.Length);
reqBody.Close();
}
HttpWebResponse resp1 = req.GetResponse() as HttpWebResponse;
string cookie = resp1.Headers["Set-Cookie"];
if(string.IsNullOrEmpty(cookie))
{
if (0 < resp1.ContentLength)
{
// it's probably not an event day, and the server is returning a singlecharacter
StreamReader stringReader = new StreamReader(resp1.GetResponseStream());
return stringReader.ReadToEnd();
}
return null;
}
return ParseCookie(cookie);
}
我相信我的Java代碼是不正確形成POST請求，因爲當我使用一個URLConnection並打印請求頭從web-sniffer.net如下：
POST /reg/login HTTP/1.1[CRLF]
Host: live-timing.formula1.com[CRLF]
Connection: close[CRLF]
User-Agent: Web-sniffer/1.0.37 (+http://web-sniffer.net/)[CRLF]
Accept-Charset: ISO-8859-1,UTF-8;q=0.7,*;q=0.7[CRLF]
Cache-Control: no-cache[CRLF]
Accept-Language: de,en;q=0.7,en-us;q=0.3[CRLF]
Referer: http://web-sniffer.net/[CRLF]
Content-type: application/x-www-form-urlencoded[CRLF]
Content-length: 53[CRLF]
[CRLF]
email=john%40gmail.com&password=mypassword
我得到的迴應包含set-cookies標頭的服務器。我的java代碼是否生成與web-sniffer.net相同的請求？
我看到使用此代碼生成的交方法：
PostMethod authPost = new PostMethod("http://localhost:8000/webTest/j_security_check");
// authPost.setFollowRedirects(false);
NameValuePair[] data = {
new NameValuePair("email", "john%40gmail.com"),
new NameValuePair("password", "mypassword")
};
authPost.setRequestBody(data);
status = client.executeMethod(authPost);
這裏的主要區別在於，NameValuePair數據在請求體設置，而不是設置爲實體。這是否有所作爲？這會產生正確的請求標題嗎？
謝謝你的幫助。然而，在迭代cookie中使用'BasicCookieStore'不會返回cookie，就像使用DefaultHttpClient的內部cookie存儲一樣。我不知道爲什麼... – 2012-01-09 22:29:31
奇怪。幾天前我在一個項目中使用了HttpClient（版本4.1.2）。我的代碼和你的代碼很相似 - 外部的BasicCookieStore - 但是當我遍歷它時，cookies就在那裏。 – waxwing 2012-01-09 22:39:21
嗯...可能是一個4.0.3的錯誤？我無法想象，但它是一個非常巨大的陷阱。是否還有其他系統變量需要設置？我看到他們在一些文檔中提到過幾次。 – 2012-01-09 23:07:23