[VB/C#] niconico にログイン

コードから niconico にメールアドレスとパスワードでログインします。

下記コードの GetUserSession でログインし、必要な Cookie を取得します。ログイン後、例としてマイページの HTML を取得しています。

System.Net, System.IO を import してください。

Visual Basic (VB.NET)

	Sub Main()
	' ログイン（Cookie の取得）
	Dim session = GetUserSession("メールアドレス", "パスワード")

	' マイページ取得（取得した Cookie を付けてアクセス）
	Dim url = "http://www.nicovideo.jp/my/top"
	Dim req = WebRequest.CreateHttp(New Uri(url))
	req.CookieContainer = New CookieContainer
	req.CookieContainer.Add(session)

	Dim html As String
	Using res = req.GetResponse
	Using rs = res.GetResponseStream
	Using sr = New StreamReader(rs)
	html = sr.ReadToEnd
	End Using
	End Using
	End Using
	End Sub

	Private Function GetUserSession(ByVal email As String, ByVal password As String) As Cookie
	Const path As String = "https://secure.nicovideo.jp/secure/login?site=niconico"
	Dim req = WebRequest.CreateHttp(New Uri(path))
	Dim param = String.Format("mail={0}&password={1}", Uri.EscapeDataString(email), Uri.EscapeDataString(password))
	Dim buf = System.Text.Encoding.UTF8.GetBytes(param)

	req.Method = "POST"
	req.ContentType = "application/x-www-form-urlencoded"
	req.ContentLength = buf.Length
	req.Referer = "https://secure.nicovideo.jp/secure/login_form"
	req.CookieContainer = New CookieContainer
	Using rs = req.GetRequestStream()
	rs.Write(buf, 0, buf.Length)
	End Using

	Dim html As String
	Using res = req.GetResponse
	Using rs = res.GetResponseStream
	Using sr = New StreamReader(rs)
	html = sr.ReadToEnd
	End Using
	End Using
	Dim cookies = req.CookieContainer.GetCookies(New Uri(path))
	Return cookies("user_session") ' MEMO: 無い場合は Nothing
	End Using
	End Function

view raw

Module.vb

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	static void Main(string[] args)
	{
	// ログイン（Cookie の取得）
	var session = GetUserSession("メールアドレス", "パスワード");

	// マイページ取得（取得した Cookie を付けてアクセス）
	var url = "http://www.nicovideo.jp/my/top";
	var req = WebRequest.CreateHttp(new Uri(url));
	req.CookieContainer = new CookieContainer();
	req.CookieContainer.Add(session);

	string html = null;
	using (var res = req.GetResponse())
	{
	using (var rs = res.GetResponseStream())
	{
	using (var sr = new StreamReader(rs))
	{
	html = sr.ReadToEnd();
	}
	}
	}
	}

	private static Cookie GetUserSession(string email, string password)
	{
	const string path = "https://secure.nicovideo.jp/secure/login?site=niconico";
	var req = WebRequest.CreateHttp(new Uri(path));
	var param = string.Format("mail={0}&password={1}", Uri.EscapeDataString(email), Uri.EscapeDataString(password));
	var buf = System.Text.Encoding.UTF8.GetBytes(param);

	req.Method = "POST";
	req.ContentType = "application/x-www-form-urlencoded";
	req.ContentLength = buf.Length;
	req.Referer = "https://secure.nicovideo.jp/secure/login_form";
	req.CookieContainer = new CookieContainer();
	using (var rs = req.GetRequestStream())
	{
	rs.Write(buf, 0, buf.Length);
	}

	string html = null;
	using (var res = req.GetResponse())
	{
	using (var rs = res.GetResponseStream())
	{
	using (var sr = new StreamReader(rs))
	{
	html = sr.ReadToEnd();
	}
	}
	var cookies = req.CookieContainer.GetCookies(new Uri(path));
	return cookies["user_session"]; // MEMO: 無い場合は null
	}
	}

view raw

Program.cs

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Posted by jz5