连接到LiveLink并下载文档

Question

我需要连接到LiveLink并下载一些ISO PDF文件。

我的连接方式是：

string url = "http://pod.iso.org/isostd/livelink?func=ll.login&Username=user&password=pasword";
string urlDoc = "http://pod.iso.org/isostd/livelink?func=doc.fetch&nodeid=705699&doctitle=ISO_11095";
string responseString = string.Empty;
WebRequest wReq = WebRequest.Create(url);
HttpWebRequest httpReq = (HttpWebRequest)wReq;
httpReq.Method = "POST";
httpReq.AllowAutoRedirect = false;
HttpWebResponse response = (HttpWebResponse)httpReq.GetResponse();            
string resp = response.StatusCode.ToString();

变量resp给我“确定”，因此我已登录到该站点，但不知道如何继续。变量urlDoc是要下载的文档的url，但是我无法继续。

提前打个招呼，对不起我的英语不好。

Answer 1

Answer 2

Answer 3

protected override void Login()
{
    var httpparams = new Hashtable();
    httpparams.Add("func", "ll.login");
    httpparams.Add("CurrentClientTime", DateTime.Now.ToString("D/yyyy/M/dd:H:m:s"));
    httpparams.Add("Username", this.LoginName);
    httpparams.Add("Password", this.Password);

    byte[] requestPostParams = WebHelper.GetWebPostData(httpparams);

    HttpWebRequest loginRequest = this.GetWebRequest(this.Uri);
    loginRequest.Method = "POST";
    loginRequest.GetRequestStream().Write(requestPostParams, 0, requestPostParams.Length);
    loginRequest.GetRequestStream().Close();

    var response = (HttpWebResponse)loginRequest.GetResponse();
    response.Cookies = loginRequest.CookieContainer.GetCookies(loginRequest.RequestUri);
}

public static byte[] GetWebPostData(Hashtable httpparams)
{
    StringBuilder requestStream = new System.Text.StringBuilder();
    foreach (string paramname in httpparams.Keys)
    {
        if (requestStream.Length == 0)
        {
            requestStream.Append(string.Format("{0}={1}", paramname, httpparams[paramname]));
        }
        else
        {
            requestStream.Append(string.Format("&{0}={1}", paramname, httpparams[paramname]));
        }
    }
    UTF8Encoding encoding = new UTF8Encoding();
    return encoding.GetBytes(requestStream.ToString());
}
private void validateConnection()
{
    if ((!this._IsConnected) || this._LastExecutionTime < DateTime.Now.AddMinutes(-15))
    {
        this._IsConnected = false;
        try
        {
            // recreate cookies container
            this._CookiesContainer = new CookieContainer();

            // login to livelink
            this.Login();

            this._IsConnected = true;
            this.ResetCounter();
        }
        catch (Exception e)
        {
            string context = string.Format("Login to: {0}; user: {1}", this.Name, this.LoginName);
            this.NextAttempt(e, context);

            // try one more time
            this.validateConnection();
        }
    }
}

/// <summary>
/// Download file from livelink based on provided query string
/// </summary>
public bool DownloadFileUri(string fileUri, string destinationFile)
{
    // validate input
    if (string.IsNullOrEmpty(fileUri))
        return false;

    if (string.IsNullOrEmpty(destinationFile))
        return false;

    // check that adapter is connected to livelink
    this.validateConnection();

    // get file content
    FileStream fs = null;
    HttpWebResponse response = null;
    try
    {
        //Retreive file
        var httpRequest = this.GetWebRequest(fileUri);
        httpRequest.Method = "GET";
        httpRequest.Proxy = ConnectorBase.GetProxy();
        response = (HttpWebResponse)httpRequest.GetResponse();

        int bytesRead;
        int bytesReceived = 0;
        var buffer = new byte[1000000];

        Stream receiveStream = response.GetResponseStream();
        fs = new FileStream(destinationFile, FileMode.Create);
        while ((bytesRead = receiveStream.Read(buffer, 0, buffer.Length)) > 0)
        {
            fs.Write(buffer, 0, bytesRead);
            bytesReceived += bytesRead;
            this.OnDataDownload(bytesReceived);
        }

        // close file stream
        fs.Close();
        fs = null;

        // check file information
        var fi = new FileInfo(destinationFile);

        this.ResetCounter();

        // check file size and return true if file size > 0
        return fi.Length > 0;
    }
    catch (WebException e)
    {
        ResetAdapter();

        string context = string.Format("Uri: {0}", fileUri);
        this.NextAttempt(e, context);

        return DownloadFileUri(fileUri, destinationFile);
    }
    catch (Exception e)
    {
        ResetAdapter();

        string context = string.Format("Uri: {0}", fileUri);
        Logger.Error("Error: {0}, context: {1}", e.ToString(), context);

        throw;
    }
    finally
    {
        if (fs != null)
            fs.Close();
        if (response != null)
            response.Close();
    }
}

通常，我可以共享代码下载文件或解析Livelink的内容以下载页面上引用的所有文档，请告诉我，