使用BrowserSession和HtmlAgilityPack通过.NET登录到Facebook
我试图使用Rohit Agarwal的BrowserSession类与HtmlAgilityPack一起登录并随后在Facebook上导航。使用BrowserSession和HtmlAgilityPack通过.NET登录到Facebook
我以前通过编写我自己的HttpWebRequest来管理。然而,它只在我从我的浏览器手动获取cookie并在每次进行新的“会话”时向请求插入新的cookie字符串时才起作用。现在我试图使用BrowserSession来获得更智能的导航。
下面是当前的代码:
BrowserSession b = new BrowserSession(); b.Get(@"http://www.facebook.com/login.php");
b.FormElements["email"] = "[email protected]";
b.FormElements["pass"] = "xxxxxxxx";
b.FormElements["lsd"] = "qDhIH";
b.FormElements["trynum"] = "1";
b.FormElements["persistent_inputcheckbox"] = "1";
var response = b.Post(@"https://login.facebook.com/login.php?login_attempt=1");
上述工作正常。当我尝试再次使用此BrowserSession来获取另一个页面时出现问题。我这样做是因为BrowserSession从最后一个响应中保存了Cookie并将它们插入到下一个请求中,因此我不必手动输入从我的浏览器中获取的cookiedata。
然而,当我尝试做这样的事情:
var profilePage = b.Get(@"https://m.facebook.com/profile.php?id=1111111111");
我回来的文档是空的。我将不胜感激任何关于我做错的投入。
回答:
对不起,我不太了解你提到的HTML敏捷包或BrowserSession类。但我确实尝试了与HtmlUnit相同的场景,它工作得很好。我使用的是.NET包装(它的源代码可以发现here并解释多一点here),这里是我使用的代码(一些细节去除,以保护无辜者):
var driver = new HtmlUnitDriver(true); driver.Url = @"http://www.facebook.com/login.php";
var email = driver.FindElement(By.Name("email"));
email.SendKeys("[email protected]");
var pass = driver.FindElement(By.Name("pass"));
pass.SendKeys("xxxxxxxx");
var inputs = driver.FindElements(By.TagName("input"));
var loginButton = (from input in inputs
where input.GetAttribute("value").ToLower() == "login"
&& input.GetAttribute("type").ToLower() == "submit"
select input).First();
loginButton.Click();
driver.Url = @"https://m.facebook.com/profile.php?id=1111111111";
Assert.That(driver.Title, Is.StringContaining("Title of page goes here"));
希望这有助于。
回答:
你检查了他们的新API吗? http://developers.facebook.com/docs/authentication/
可以调用一个简单的URL来获得OAuth2.0用户访问令牌,并附上您的要求休息...
https://graph.facebook.com/oauth/authorize? client_id=...&
redirect_uri=http://www.example.com/oauth_redirect
更改REDIRECT_URI任何你想要的网址,它会使用名为“access_token”的参数对它进行回调。获取它并进行任何你想要的自动化SDK调用。
回答:
您可能需要使用WatiN (Web Application Testing In .Net)或Selenium来驱动您的浏览器。这将有助于确保您不必摆弄cookies并进行任何自定义工作以使后续请求能够工作,因为您正在模拟实际用户。
回答:
今天我面临同样的问题。我还和HtmlAgilityPack一起合作了Rohit Agarwal的BrowserSession课。 经过一整天的试错编程后,我发现问题是由于在后续请求中没有设置正确的cookie而导致的。 我没有改变初始的BrowserSession代码来正常工作,但我添加了以下功能并略微修改了SameCookieFrom函数。最后它对我很好。
的添加/修改功能如下:
class BrowserSession{ private bool _isPost;
private HtmlDocument _htmlDoc;
public CookieContainer cookiePot; //<- This is the new CookieContainer
...
public string Get2(string url)
{
HtmlWeb web = new HtmlWeb();
web.UseCookies = true;
web.PreRequest = new HtmlWeb.PreRequestHandler(OnPreRequest2);
web.PostResponse = new HtmlWeb.PostResponseHandler(OnAfterResponse2);
HtmlDocument doc = web.Load(url);
return doc.DocumentNode.InnerHtml;
}
public bool OnPreRequest2(HttpWebRequest request)
{
request.CookieContainer = cookiePot;
return true;
}
protected void OnAfterResponse2(HttpWebRequest request, HttpWebResponse response)
{
//do nothing
}
private void SaveCookiesFrom(HttpWebResponse response)
{
if ((response.Cookies.Count > 0))
{
if (Cookies == null)
{
Cookies = new CookieCollection();
}
Cookies.Add(response.Cookies);
cookiePot.Add(Cookies); //-> add the Cookies to the cookiePot
}
}
做些什么:它基本上保存的cookies,从最初的“后反应”,并增加了相同的CookieContainer到后来叫请求。我不完全理解为什么它在初始版本中不起作用,因为它在AddCookiesTo-function中以某种方式执行相同的操作。 (如果(Cookies!= null & & Cookies.Count> 0)request.CookieContainer.Add(Cookies);) 无论如何,使用这些附加功能它现在应该可以正常工作。
它可以像这样使用:
//initial "Login-procedure" BrowserSession b = new BrowserSession();
b.Get("http://www.blablubb/login.php");
b.FormElements["username"] = "yourusername";
b.FormElements["password"] = "yourpass";
string response = b.Post("http://www.blablubb/login.php");
所有后续调用应该使用:
response = b.Get2("http://www.blablubb/secondpageyouwannabrowseto"); response = b.Get2("http://www.blablubb/thirdpageyouwannabrowseto");
...
我希望它可以帮助很多人都面临着同样的问题!
回答:
我解决了这个问题的根本原因,如果任何人关心。事实证明,Cookie正被保存在REQUEST对象的CookieContainer中,而不是响应对象。我还添加了下载文件的功能(前提是该文件是基于字符串的)。代码绝对不是线程安全的,但对象不是线程安全的,首先:
public class BrowserSession {
private bool _isPost;
private bool _isDownload;
private HtmlDocument _htmlDoc;
private string _download;
/// <summary>
/// System.Net.CookieCollection. Provides a collection container for instances of Cookie class
/// </summary>
public CookieCollection Cookies { get; set; }
/// <summary>
/// Provide a key-value-pair collection of form elements
/// </summary>
public FormElementCollection FormElements { get; set; }
/// <summary>
/// Makes a HTTP GET request to the given URL
/// </summary>
public string Get(string url)
{
_isPost = false;
CreateWebRequestObject().Load(url);
return _htmlDoc.DocumentNode.InnerHtml;
}
/// <summary>
/// Makes a HTTP POST request to the given URL
/// </summary>
public string Post(string url)
{
_isPost = true;
CreateWebRequestObject().Load(url, "POST");
return _htmlDoc.DocumentNode.InnerHtml;
}
public string GetDownload(string url)
{
_isPost = false;
_isDownload = true;
CreateWebRequestObject().Load(url);
return _download;
}
/// <summary>
/// Creates the HtmlWeb object and initializes all event handlers.
/// </summary>
private HtmlWeb CreateWebRequestObject()
{
HtmlWeb web = new HtmlWeb();
web.UseCookies = true;
web.PreRequest = new HtmlWeb.PreRequestHandler(OnPreRequest);
web.PostResponse = new HtmlWeb.PostResponseHandler(OnAfterResponse);
web.PreHandleDocument = new HtmlWeb.PreHandleDocumentHandler(OnPreHandleDocument);
return web;
}
/// <summary>
/// Event handler for HtmlWeb.PreRequestHandler. Occurs before an HTTP request is executed.
/// </summary>
protected bool OnPreRequest(HttpWebRequest request)
{
AddCookiesTo(request); // Add cookies that were saved from previous requests
if (_isPost) AddPostDataTo(request); // We only need to add post data on a POST request
return true;
}
/// <summary>
/// Event handler for HtmlWeb.PostResponseHandler. Occurs after a HTTP response is received
/// </summary>
protected void OnAfterResponse(HttpWebRequest request, HttpWebResponse response)
{
SaveCookiesFrom(request, response); // Save cookies for subsequent requests
if (response != null && _isDownload)
{
Stream remoteStream = response.GetResponseStream();
var sr = new StreamReader(remoteStream);
_download = sr.ReadToEnd();
}
}
/// <summary>
/// Event handler for HtmlWeb.PreHandleDocumentHandler. Occurs before a HTML document is handled
/// </summary>
protected void OnPreHandleDocument(HtmlDocument document)
{
SaveHtmlDocument(document);
}
/// <summary>
/// Assembles the Post data and attaches to the request object
/// </summary>
private void AddPostDataTo(HttpWebRequest request)
{
string payload = FormElements.AssemblePostPayload();
byte[] buff = Encoding.UTF8.GetBytes(payload.ToCharArray());
request.ContentLength = buff.Length;
request.ContentType = "application/x-www-form-urlencoded";
System.IO.Stream reqStream = request.GetRequestStream();
reqStream.Write(buff, 0, buff.Length);
}
/// <summary>
/// Add cookies to the request object
/// </summary>
private void AddCookiesTo(HttpWebRequest request)
{
if (Cookies != null && Cookies.Count > 0)
{
request.CookieContainer.Add(Cookies);
}
}
/// <summary>
/// Saves cookies from the response object to the local CookieCollection object
/// </summary>
private void SaveCookiesFrom(HttpWebRequest request, HttpWebResponse response)
{
//save the cookies ;)
if (request.CookieContainer.Count > 0 || response.Cookies.Count > 0)
{
if (Cookies == null)
{
Cookies = new CookieCollection();
}
Cookies.Add(request.CookieContainer.GetCookies(request.RequestUri));
Cookies.Add(response.Cookies);
}
}
/// <summary>
/// Saves the form elements collection by parsing the HTML document
/// </summary>
private void SaveHtmlDocument(HtmlDocument document)
{
_htmlDoc = document;
FormElements = new FormElementCollection(_htmlDoc);
}
}
/// <summary>
/// Represents a combined list and collection of Form Elements.
/// </summary>
public class FormElementCollection : Dictionary<string, string>
{
/// <summary>
/// Constructor. Parses the HtmlDocument to get all form input elements.
/// </summary>
public FormElementCollection(HtmlDocument htmlDoc)
{
var inputs = htmlDoc.DocumentNode.Descendants("input");
foreach (var element in inputs)
{
string name = element.GetAttributeValue("name", "undefined");
string value = element.GetAttributeValue("value", "");
if (!this.ContainsKey(name))
{
if (!name.Equals("undefined"))
{
Add(name, value);
}
}
}
}
/// <summary>
/// Assembles all form elements and values to POST. Also html encodes the values.
/// </summary>
public string AssemblePostPayload()
{
StringBuilder sb = new StringBuilder();
foreach (var element in this)
{
string value = System.Web.HttpUtility.UrlEncode(element.Value);
sb.Append("&" + element.Key + "=" + value);
}
return sb.ToString().Substring(1);
}
}
回答:
我有类似的症状 - 登录工作,但身份验证cookie是不存在的cookie容器,所以它不随后的请求发送。我发现这是因为web请求在内部处理Location:标头,在幕后重定向到新页面,在进程中丢失了Cookie。我通过加入以下内容来解决这个问题:
request.AllowAutoRedirect = false; // Location header messing up cookie handling!
...到OnPreRequest()函数。它现在看起来像这样:
protected bool OnPreRequest(HttpWebRequest request) {
request.AllowAutoRedirect = false; // Location header messing up cookie handling!
AddCookiesTo(request); // Add cookies that were saved from previous requests
if (_isPost) AddPostDataTo(request); // We only need to add post data on a POST request
return true;
}
我希望这可以帮助有人遇到同样的问题。
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