.net core读取leancloud上的数据
public IActionResult Index()
{
try
{
string url = "https://xxxx.xxx.net/1.1/classes/guestbook?order=-createdAt&count=1";
string leancloud_appid = "dJzCJfdsfdsoHsz";
string leancloud_appkey = "eggw223fdsWr2u2vNFxv";
Dictionary<string, string> heads = new Dictionary<string, string>();
heads.Add("X-LC-Id", leancloud_appid);
heads.Add("X-LC-Key", leancloud_appkey);
string retstr = Util.HttpService.Get(url, heads);
Model.GuestBook_LeanReturn retm = Newtonsoft.Json.JsonConvert.DeserializeObject<Model.GuestBook_LeanReturn>(retstr);
ViewBag.totalcount = retm.count;
return View(retm.results);
}
catch (Exception ex)
{
return Content("出错："+ex.Message);
}
}
using System;
namespace Niunan.Admin.Model
{
public class GuestBook_LeanReturn
{
public List<GuestBook_LeanReturnInner> results { set; get; }
public int count { set; get; }
}
public class GuestBook_LeanReturnInner {
public string lianxi { set; get; }
public string body { set; get; }
public DateTime createdAt { set; get; }
public string objectId { set; get; }
}
}
用的rest api的方法来查数据的，具体可查官方文档
https://docs.leancloud.cn/sdk/storage/guide/rest/
分页的话可以在url里加上&limit=10&sikp=5
工具类的代码如下：
using System;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
namespace Niunan.Admin.Util
{
public class HttpService
{
public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
//直接确认，否则打不开
return true;
}
/// <summary>
/// post提交
/// </summary>
/// <param name="xml"></param>
/// <param name="url"></param>
/// <param name="isUseCert"></param>
/// <param name="timeout"></param>
/// <param name="contenttype">如：application/x-www-form-urlencoded，text/xml</param>
/// <param name="heads">头信息</param>
/// <returns></returns>
public static string Post(string xml, string url, bool isUseCert, int timeout, string contenttype = "application/x-www-form-urlencoded", Dictionary<string, string> heads = null)
{
System.GC.Collect();//垃圾回收，回收没有正常关闭的http连接
string result = "";//返回结果
System.Net.HttpWebRequest request = null;
System.Net.HttpWebResponse response = null;
Stream reqStream = null;
try
{
//设置最大连接数
ServicePointManager.DefaultConnectionLimit = 200;
//设置https验证方式
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback =
new RemoteCertificateValidationCallback(CheckValidationResult);
}
/***************************************************************
* 下面设置HttpWebRequest的相关属性
* ************************************************************/
request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
request.Timeout = timeout * 1000;
if (heads != null)
{
foreach (var item in heads.Keys)
{
request.Headers.Add(item, heads[item]);
}
}
//设置代理服务器
//WebProxy proxy = new WebProxy(); //定义一个网关对象
//proxy.Address = new Uri(WxPayConfig.PROXY_URL); //网关服务器端口:端口
//request.Proxy = proxy;
//设置POST的数据类型和长度
request.ContentType = contenttype;
byte[] data = System.Text.Encoding.UTF8.GetBytes(xml);
request.ContentLength = data.Length;
//是否使用证书
if (isUseCert)
{
//复制微信DEMO的，这里不用证书
//string path = HttpContext.Current.Request.PhysicalApplicationPath;
//X509Certificate2 cert = new X509Certificate2(path + WxPayConfig.SSLCERT_PATH, WxPayConfig.SSLCERT_PASSWORD);
//request.ClientCertificates.Add(cert);
//Log.Debug("WxPayApi", "PostXml used cert");
}
//往服务器写入数据
reqStream = request.GetRequestStream();
reqStream.Write(data, 0, data.Length);
reqStream.Close();
//获取服务端返回
response = (HttpWebResponse)request.GetResponse();
//获取服务端返回数据
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
result = sr.ReadToEnd().Trim();
sr.Close();
}
catch (Exception e)
{
// Log.Error("HttpService", e.ToString());
throw e;
}
finally
{
//关闭连接和流
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return result;
}
/// <summary>
/// 处理http GET请求，返回数据
/// </summary>
/// <param name="url">请求的url地址</param>
/// <returns>http GET成功后返回的数据，失败抛WebException异常</returns>
public static string Get(string url, Dictionary<string, string> heads = null)
{
System.GC.Collect();
string result = "";
System.Net.HttpWebRequest request = null;
System.Net.HttpWebResponse response = null;
//请求url以获取数据
try
{
//设置最大连接数
ServicePointManager.DefaultConnectionLimit = 200;
//设置https验证方式
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback =
new RemoteCertificateValidationCallback(CheckValidationResult);
}
/***************************************************************
* 下面设置HttpWebRequest的相关属性
* ************************************************************/
request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
if (heads != null)
{
foreach (var item in heads.Keys)
{
request.Headers.Add(item, heads[item]);
}
}
//设置代理
//WebProxy proxy = new WebProxy();
//proxy.Address = new Uri(WxPayConfig.PROXY_URL);
//request.Proxy = proxy;
//获取服务器返回
response = (HttpWebResponse)request.GetResponse();
//获取HTTP返回数据
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
result = sr.ReadToEnd().Trim();
sr.Close();
}
catch (Exception e)
{
throw e;
}
finally
{
//关闭连接和流
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return result;
}
/// <summary>
/// http里的delete方式
/// </summary>
/// <param name="url"></param>
/// <param name="heads"></param>
/// <returns></returns>
public static string Delete(string url, Dictionary<string, string> heads = null)
{
System.GC.Collect();
string result = "";
HttpWebRequest request = null;
HttpWebResponse response = null;
//请求url以获取数据
try
{
//设置最大连接数
ServicePointManager.DefaultConnectionLimit = 200;
//设置https验证方式
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback =
new RemoteCertificateValidationCallback(CheckValidationResult);
}
/***************************************************************
* 下面设置HttpWebRequest的相关属性
* ************************************************************/
request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "DELETE";
if (heads != null)
{
foreach (var item in heads.Keys)
{
request.Headers.Add(item, heads[item]);
}
}
//设置代理
//WebProxy proxy = new WebProxy();
//proxy.Address = new Uri(WxPayConfig.PROXY_URL);
//request.Proxy = proxy;
//获取服务器返回
response = (HttpWebResponse)request.GetResponse();
//获取HTTP返回数据
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
result = sr.ReadToEnd().Trim();
sr.Close();
}
catch (Exception e)
{
throw e;
}
finally
{
//关闭连接和流
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return result;
}
}
}
标签：core,heads,string,url,request,response,leancloud,null,net From： https://www.cnblogs.com/niunan/p/17543345.html