Yahoo Finance API：远程服务器返回错误：(414) Request URI Too Long答案

【问题标题】：Yahoo Finance API : The remote server returned an error: (414) Request URI Too LongYahoo Finance API：远程服务器返回错误：(414) Request URI Too Long
【发布时间】：2013-11-22 09:18:10
【问题描述】：

我正在向金融 yahoo 发送请求，如果符号最大为 200，我的以下代码工作正常。如果符号超过 200，我收到错误“远程服务器返回错误：(414) 请求 URI 太长。”

实际符号超过20000个

你能提出一个可能的解决方案吗？

string yahooQuoteUrl = "http://finance.yahoo.com/d/quotes.csv?s=";
string yahooParameters = "&f=sl1d1yxn";
string Url ="";
SqlConnection sqlConnection = new SqlConnection(con1);
SqlCommand sqlCommand = new SqlCommand("SELECT Symbol FROM PM_Securities",sqlConnection);
sqlConnection.Open();
SqlDataReader reader = sqlCommand.ExecuteReader();
GridView2.DataSource = reader;
GridView2.DataBind();
string symbols= GridView2.Rows[0].Cells[0].Text;

string csvData;
    using (WebClient web = new WebClient())
    {
        Url = yahooQuoteUrl + symbols+ yahooParameters;
        csvData = web.DownloadString(Url);
    }


    List<Price> prices = Parse(csvData);
    GridView1.DataSource = prices;
    GridView1.DataBind();

【问题讨论】：

将作业拆分为多个少于 200 个的单独请求？
尝试使用 POST 而不是 GET
我只是更新我的代码。我的符号是从我的数据库中检索到的，所以我不知道符号的确切数量。我的一个客户可能有 10000 或其他客户可能有 30000 或其他客户可能有 100。
你能给我提供使用 POST 的例子吗

标签： c# url webclient yahoo yahoo-finance

【解决方案1】：

我根据我计算的符号分隔请求。以下解决方案对我很有用。

  if (count <= 200) {

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText200 + yahooParameters;
            csvData200 = web.DownloadString(Url);
        }

        csvData = csvData200;
        List<Price> prices = Parse(csvData);
        GridView1.DataSource = prices;
        GridView1.DataBind();

    }


    if (count>=201 & count<=400)
    {

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText200 + yahooParameters;
            csvData200 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText400 + yahooParameters;
            csvData400 = web.DownloadString(Url);
        }

        csvData = csvData200 + csvData400;
        List<Price> prices = Parse(csvData);
        GridView1.DataSource = prices;
        GridView1.DataBind();
    }


    if (count >= 401 & count <= 600)
    {

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText200 + yahooParameters;
            csvData200 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText400 + yahooParameters;
            csvData400 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText600 + yahooParameters;
            csvData600 = web.DownloadString(Url);
        }

        csvData = csvData200 + csvData400 + csvData600;
        List<Price> prices = Parse(csvData);
        GridView1.DataSource = prices;
        GridView1.DataBind();

    }



    if (count >= 601 & count <= 800)
    {

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText200 + yahooParameters;
            csvData200 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText400 + yahooParameters;
            csvData400 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText600 + yahooParameters;
            csvData600 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText800 + yahooParameters;
            csvData800 = web.DownloadString(Url);
        }

        csvData = csvData200 + csvData400 + csvData600 + csvData800;
        List<Price> prices = Parse(csvData);
        GridView1.DataSource = prices;
        GridView1.DataBind();

    }

    if (count >= 801 & count <= 1000)
    {

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText200 + yahooParameters;
            csvData200 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText400 + yahooParameters;
            csvData400 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText600 + yahooParameters;
            csvData600 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText800 + yahooParameters;
            csvData800 = web.DownloadString(Url);
        }

        using (WebClient web = new WebClient())
        {
            Url = yahooQuoteUrl + cellText1000 + yahooParameters;
            csvData1000 = web.DownloadString(Url);
        }

        csvData = csvData200 + csvData400 + csvData600 + csvData800 + csvData1000;
        List<Price> prices = Parse(csvData);
        GridView1.DataSource = prices;
        GridView1.DataBind();

    }

【讨论】：