在研究了如何做之后，我一直无法让它发挥作用。截至目前，我必须每3600秒手动更新一次授权令牌。这是我运行aspx.cs文档的代码。
using System;
using System.Collections.Specialized;
using System.IO;
using System.Net;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Task_2
{
public partial class Default : System.Web.UI.Page
{
// Title variables for the table cells.
const int ALBUM = 0, ARTIST = 1, DATE = 2, TRACKS = 3, POPULARITY = 4;
// Authorization key ... at the moment needs to be manually reset every 3600 seconds.
const string token = "BQAdFDzrPcE-_AXGtaOQUrDyGoxsnClCiJahKOWXOpbzt78UwmyVEYCeXfbo6GqYUJrVdcm_Hbz1FZrGpwhZeBxENpFrwp4gd7JlbBFZpy78uY8IXZdRkZH2zbd677QGRBq_EbEY3TvmnUg";
// Event function that triggers after the search button is hit.
public void button1Clicked(object sender, EventArgs args)
{
// Search button and actions
button1.Text = "Search";
string name = query.Text;
// Error checking with try/catch
try
{
// sets label1 to not be visible if results are found. *Label1 says "no results are found"
Label1.Visible = false;
Label2.Visible = false;
// ensures that a name is entered
if (name != null)
{
// creates the search request from spotify. Telling it where to call from.
string search = "https://api.spotify.com/v1/search?q=" + name + "&type=artist";
var request = (HttpWebRequest)WebRequest.Create(search);
request.Method = "GET";
request.ContentType = "application/json";
request.Accept = "application/json";
request.Headers.Add("Authorization", "Bearer " + token);
// The output of the response stream.
string output = String.Empty;
// Gets a response from the request call and stores it into output
// Notice how I close the response and abort the request. Release is needed for future WebRequests
using (var response = request.GetResponse())
{
using (var stream = new StreamReader(response.GetResponseStream()))
{
output = stream.ReadToEnd();
}
response.Close();
}
request.Abort();
// Used for the next api request
// Gets the first id from the output stream.
string idString = "";
int index1 = output.IndexOf("id\" : \"");
if (index1 != -1) idString = output.Substring(index1 + 7, 22);
// Used to build the table.
TableRow[] tRow = new TableRow[6];
TableCell[][] tCell = new TableCell[6][];
// Builds an empty table
for (int i = 0; i < 6; i++)
{
tRow[i] = new TableRow();
tCell[i] = new TableCell[6];
for (int j = 0; j < 5; j++)
{
tCell[i][j] = new TableCell();
tCell[i][j].BorderStyle = BorderStyle.Solid;
tCell[i][j].Text = "";
tCell[i][j].Visible = true;
tRow[i].Cells.Add(tCell[i][j]);
}
Table1.Rows.Add(tRow[i]);
Table1.Visible = true;
}
// Fills in the artist name in the table.
for (int i = 1; i < 6; i++)
{
tCell[i][ARTIST].Text = name;
}
// Fills in the header row with titles.
Table1.Visible = true;
tCell[0][ALBUM].Text = "Album Name";
tCell[0][ARTIST].Text = "Artist Name";
tCell[0][DATE].Text = "Date of Release";
tCell[0][TRACKS].Text = "Tracks";
tCell[0][POPULARITY].Text = "Popularity";
// Creates the albumb search request from spotify using ID from search artist output.
string id = "https://api.spotify.com/v1/artists/" + idString + "/albums";
var idRequest = (HttpWebRequest)WebRequest.Create(id);
idRequest.Method = "GET";
idRequest.ContentType = "application/json";
idRequest.Accept = "application/json";
idRequest.Headers.Add("Authorization", "Bearer " + token);
// The output of the response stream.
string output2 = String.Empty;
// Gets a response from the request call and stores it into output
using (var response2 = idRequest.GetResponse())
{
using (var stream2 = new StreamReader(response2.GetResponseStream()))
{
output2 = stream2.ReadToEnd();
}
response2.Close();
}
idRequest.Abort();
// Array of album names.
string[] albumName = new string[5];
// Used for traversing the output stream.
index1 = 0;
int endIndex = 0;
// Fills in the album name column in table1 from the output stream.
for (int i = 0, startIndex = 0; i < 5; i++)
{
albumName[i] = "";
index1 = output2.IndexOf(" \"name\" : \"", startIndex);
if (index1 == -1) break;// in case it doesn't find the substring
else
{
// uses index start and stop points to retreive substring
// " "name" : "" has 11 characters
endIndex = output2.IndexOf("\"", index1 + 11);
albumName[i] = output2.Substring(index1 + 11, endIndex - (index1 + 11));
// Gets rid of the excessive data that is not relevant to intended search results.
// the output includes Artist name and the literal "Various Artists" after " "name" : ""
if (albumName[i] != name && albumName[i] != "Various Artists")
{
tCell[i + 1][ALBUM].Text = albumName[i];
}
// ensures the loop counter doesn't get wasted on unintended Artist name or "Various Artists"
else
{
i--;
}
}
//starts index pointer to right after the found substring
startIndex = index1 + (endIndex - index1);
}
// fills in the release date column; can use the same output as previous request response
// uses the same logic as previous substring search; in hindsight, should have made a function for this :P
string[] releaseDate = new string[5];
index1 = 0;
for (int i = 0, startIndex = 0; i < 5; i++)
{
releaseDate[i] = "";
index1 = output2.IndexOf(" \"release_date\" : \"", startIndex);
if (index1 == -1) break;
else
{
endIndex = output2.IndexOf("\"", index1 + 19);
releaseDate[i] = output2.Substring(index1 + 19, endIndex - (index1 + 19));
tCell[i + 1][DATE].Text = releaseDate[i];
}
startIndex = index1 + (endIndex - index1);
}
// again, could have used a similar function as above
// this stores the first 5 album IDs used for later WebRequests
string[] albumID = new string[5];
index1 = 0;
for (int i = 0, startIndex = 0; i < 5; i++)
{
albumID[i] = "";
index1 = output2.IndexOf("https://open.spotify.com/album/", startIndex);
if (index1 == -1) break;
else
{
endIndex = output2.IndexOf("\"", index1 + 31);
albumID[i] = output2.Substring(index1 + 31, endIndex - (index1 + 31));
tCell[i + 1][TRACKS].Text = albumID[i];
}
startIndex = index1 + (endIndex - index1);
}
// I noticed I can easily loop for the remaining columns
// the following are strings that will be used for the loop
string albumFiles = ""; // will combine with albumID[] for api request string
string output3 = ""; // will contain the response of the request
string[] popNum = new string[5]; // for the popularity column
string[] tracksNum = new string[5]; // for the tracks column
for (int i = 0; i < 5; i++)
{
//usual requests as before
albumFiles = "https://api.spotify.com/v1/albums/" + albumID[i];
var albumRequest = (HttpWebRequest)WebRequest.Create(albumFiles);
albumRequest.Method = "GET";
albumRequest.ContentType = "application/json";
albumRequest.Accept = "application/json";
albumRequest.Headers.Add("Authorization", "Bearer " + token);
// usual output taken from response as before
output3 = String.Empty;
using (var response3 = albumRequest.GetResponse())
{
using (var stream3 = new StreamReader(response3.GetResponseStream()))
{
output3 = stream3.ReadToEnd();
}
response3.Close();
}
albumRequest.Abort();
// fills in the popularity column
// I noticed popularity is only given once in the beginning of the output
index1 = 0;
popNum[i] = "";
index1 = output3.IndexOf("\"popularity\" : ");
if (index1 == -1) popNum[i] = "-1"; // just in case it wasn't popular?
else
{
// ""popularity" : " has 15 characters
endIndex = output3.IndexOf(",", index1 + 15);
popNum[i] = output3.Substring(index1 + 15, endIndex - (index1 + 15));
tCell[i + 1][POPULARITY].Text = popNum[i];
}
// fills in the tracks column
// I noticed the only "track_number" I needed was the last one, hence the use of LastIndexOf()
index1 = 0;
tracksNum[i] = "";
index1 = output3.LastIndexOf("\"track_number\" : ");
if (index1 == -1) tracksNum[i] = "-1";
else
{
endIndex = output3.IndexOf(",", index1 + 17);
tracksNum[i] = output3.Substring(index1 + 17, endIndex - (index1 + 17));
tCell[i + 1][TRACKS].Text = tracksNum[i];
}
}
} // end of if (name != null)
} // end of try
// if something goes wrong, like the search query not providing results
// then the table gets turned off, and the "no results found" label gets turned on
catch {
Table1.Visible = false;
Label1.Text = "Sorry, no results found.";
Label1.Visible = true;
}
}
}
}
这是我的html文档。也在aspx中。
<%@ Page Language="C#" Inherits="Task_2.Default" %>
<!DOCTYPE html>
<html>
<head runat="server">
<title>Default</title>
</head>
<body style="background-color: lightgrey">
<div align="center">
<h1 id="Title" align="center">Search for an Artist:</h1>
</div>
<form id= "Searchbar" runat="server" style="text-align:center">
<asp:TextBox id="query" runat="server" />
<asp:Button id="button1" runat="server" Text="Search" OnClick = "button1Clicked"/>
<div style="margin-top: 5em"> <asp:Table id = "Table1" runat="server" Visible = "false" BorderStyle = "Solid" BackColor = "WhiteSmoke" ForeColor = "Black" Enabled = "true" HorizontalAlign = "Center" CellPadding = "2" CellSpacing = "2"/> </div>
<asp:Label id = "Label1" runat="server" Visible = "false" BorderStyle = "None" BackColor = "LightGray" ForeColor = "Black" Enabled = "true"/>
<asp:Label id = "Label2" runat="server" Visible = "false" BorderStyle = "None" BackColor = "LightGray" ForeColor = "Black" Enabled = "true"/>
</form>
</body>
</html>
代码工作我只需要刷新令牌，因此授权代码将是自动的。
也许这个答案可以帮助你：https://stackoverflow.com/a/35999440？
它适用于iOS SDK，但auth工作流程是相同的：您需要一个服务器端脚本来帮助您刷新客户端的身份验证令牌。您的客户端需要调用服务器端点，该端点将调用Spotify端点，然后将刷新的身份验证令牌传递回客户端。
链接的答案具有指向示例服务器端脚本的链接。
如果先前使用的身份验证令牌已过期，则客户端需要在调用Spotify API之前获取更新的身份验证令牌。
另请参阅https://developer.spotify.com/web-api/authorization-guide/#supported-authorization-flows，它解释了刷新工作流程以及为什么这样做。
https://github.com/kocyigityunus/spotify-token-swap看起来像是必要的服务器端脚本的c＃实现。