DW5S/DW5S.Service/HttpHelper.cs

using DW5S.Repostory;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Security.Policy;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

/// <summary>
/// http调用帮助类
/// </summary>
public class HttpHelper
{
    /// <summary>
    /// 文件删除模型
    /// </summary>
    class FileDeleteDto
    {
        /// <summary>
        /// 要删除的服务器上的文件名称
        /// </summary>
        public List<string> Files { get; set; }
    }
    static HttpHelper()
    {
        //client = new HttpClient(new HttpClientHandler()
        //{
        //    UseCookies = false,
        //    UseDefaultCredentials = false,
        //    UseProxy = false,
        //    AllowAutoRedirect = false,
        //});
        //client.Timeout = TimeSpan.FromSeconds(60);
        ////client.MaxResponseContentBufferSize //该值默认为2GB

        //downLoadClient = new HttpClient(new HttpClientHandler()
        //{
        //    UseCookies = false,
        //    UseDefaultCredentials = false,
        //    UseProxy = false,
        //    AllowAutoRedirect = false,
        //});
        //downLoadClient.Timeout = TimeSpan.FromSeconds(180);
    }
    private static readonly string httpKey = "DW5S";
    private static readonly string httpFileKey = "DW5S_File";

    /// <summary>
    /// 
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="url"></param>
    /// <param name="dto"></param>
    /// <param name="token"></param>
    /// <returns></returns>
    public static async Task<AjaxResult<T>> PostRequestAsync<T>(string url, object dto, CancellationToken token = default)
    {
        url = SysConfig.GetUrl(url);
        var factory = IocContainer.GetService<IHttpClientFactory>();
        var client = factory.CreateClient(httpKey);
        var content = new StringContent(JsonConvert.SerializeObject(dto), System.Text.Encoding.UTF8, "application/json");
        var message = new HttpRequestMessage(HttpMethod.Post, url);
        message.Content = content;
        var response = await client.SendAsync(message, token);
        message.Dispose();//http1.1没啥用，http2有用
        response.EnsureSuccessStatusCode();
        var result = await response.Content.ReadAsStringAsync();
        var AjaxResult = JsonConvert.DeserializeObject<AjaxResult<T>>(result);
        return AjaxResult;
    }

    public static async Task<AjaxResult> PostRequestAsync(string url, object dto, CancellationToken token = default)
    {
        url = SysConfig.GetUrl(url);
        var factory = IocContainer.GetService<IHttpClientFactory>();
        var client = factory.CreateClient(httpKey);

        var content = new StringContent(JsonConvert.SerializeObject(dto), System.Text.Encoding.UTF8, "application/json");
        var message = new HttpRequestMessage(HttpMethod.Post, url);
        message.Content = content;
        var response = await client.SendAsync(message, token);
        message.Dispose();//http1.1没啥用，http2有用
        response.EnsureSuccessStatusCode();
        var result = await response.Content.ReadAsStringAsync();
        var AjaxResult = JsonConvert.DeserializeObject<AjaxResult>(result);
        return AjaxResult;
    }

    public static async Task<AjaxResult<T>> GetRequestAsync<T>(string url)
    {
        url = SysConfig.GetUrl(url);
        var factory = IocContainer.GetService<IHttpClientFactory>();
        var client = factory.CreateClient(httpKey);

        var response = await client.GetAsync(url);
        response.EnsureSuccessStatusCode();
        var result = await response.Content.ReadAsStringAsync();
        var AjaxResult = JsonConvert.DeserializeObject<AjaxResult<T>>(result);
        return AjaxResult;
    }

    public static async Task<bool> DownloadWithNameAsync(string remoteFileName, string localFile)
    {
        string url = SysConfig.GetUrl($"upload/{remoteFileName}");
        var factory = IocContainer.GetService<IHttpClientFactory>();
        var client = factory.CreateClient(httpFileKey);
        var responseMessage = await client.GetAsync(url);
        if (responseMessage.IsSuccessStatusCode)
        {
            using (var fs = File.Create(localFile))
            {
                // 获取结果，并转成 stream 保存到本地。
                var streamFromService = await responseMessage.Content.ReadAsStreamAsync();
                streamFromService.CopyTo(fs);
            }
            return true;
        }
        else
            return false;
    }
    public static async Task<bool> DownloadAsync(string url, string localFile)
    {
        var factory = IocContainer.GetService<IHttpClientFactory>();
        var client = factory.CreateClient(httpFileKey);
        var responseMessage = await client.GetAsync(url);
        if (responseMessage.IsSuccessStatusCode)
        {
            using (var fs = File.Create(localFile))
            {
                // 获取结果，并转成 stream 保存到本地。
                var streamFromService = await responseMessage.Content.ReadAsStreamAsync();
                streamFromService.CopyTo(fs);
            }
            return true;
        }
        else
            return false;
    }
    private static string GetMimeType(string fileName)
    {
        string ext = Path.GetExtension(fileName).ToLower();
        return ext switch
        {
            ".txt" => "text/plain",
            ".jpg" or ".jpeg" => "image/jpeg",
            ".png" => "image/png",
            ".pdf" => "application/pdf",
            _ => "application/octet-stream"
        };
    }

    public static async Task<string> UploadFileAsync(string localFile, string baseUrl, CancellationToken token = default)
    {
        string url = SysConfig.GetUrl("File/UploadFileAsync");
        try
        {
            var factory = IocContainer.GetService<IHttpClientFactory>();
            var client = factory.CreateClient(httpFileKey);
            using (var fileStream = File.OpenRead(localFile))
            using (var fileContent = new StreamContent(fileStream))
            {
                // 3. （可选）设置文件 MIME 类型
                string fileName = Path.GetFileName(localFile);
                string contentType = GetMimeType(fileName);
                fileContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType);

                // 4. 构造 MultipartFormDataContent
                using var formData = new MultipartFormDataContent();
                formData.Add(fileContent, "file", fileName);
                var response = await client.PostAsync(url, formData);
                if (response.IsSuccessStatusCode)
                {
                    string responseBody = await response.Content.ReadAsStringAsync();
                    var AjaxResult = JsonConvert.DeserializeObject<AjaxResult<string>>(responseBody);
                    if (AjaxResult.code == 200)
                    {
                        return AjaxResult.data;
                    }
                    else
                    {
                        throw new Exception(AjaxResult.msg);
                    }
                }
                else
                {
                    throw new Exception($"上传文件{Path.GetFileName(localFile)}到{url}失败!");
                }
            }
        }
        catch (TaskCanceledException)
        {
            if (token != default && token.IsCancellationRequested)
                throw new TaskCanceledException();
            else
                throw new Exception($"上传文件{Path.GetFileName(localFile)}到{url}超时!");

        }
        catch (Exception ex)
        {
            throw new Exception($"上传文件{Path.GetFileName(localFile)}到{url}失败!", ex);
        }
    }

    ///// <summary>
    ///// 上传文件,wav文件会自动去掉44字节头
    ///// </summary>
    ///// <param name="localFile"></param>
    ///// <param name="baseUrl"></param>
    ///// <param name="token"></param>
    ///// <returns></returns>
    //public static async Task<string> UploadFileAsync(string localFile, string baseUrl, CancellationToken token = default)
    //{
    //    string uploadUrl = baseUrl;
    //    if (baseUrl.EndsWith("/"))
    //        uploadUrl += "File/UploadFileAsync";
    //    else
    //        uploadUrl += "/File/UploadFileAsync";
    //    try
    //    {
    //        // 添加文件内容到 MultipartFormDataContent
    //        FileInfo info = new FileInfo(localFile);
    //        bool isWav = info.Extension.ToLower() == ".wav";
    //        byte[] fileBytes = File.ReadAllBytes(localFile);
    //        if (isWav)
    //        {
    //            fileBytes = fileBytes.Skip(44).ToArray();//wav文件有44字节头
    //        }
    //        MultipartFormDataContent content = new MultipartFormDataContent();
    //        ByteArrayContent fileContent = new ByteArrayContent(fileBytes);
    //        content.Add(fileContent, "file", Path.GetFileName(localFile));
    //        var message = new HttpRequestMessage(HttpMethod.Post, uploadUrl);
    //        message.Content = content;
    //        var response = await downLoadClient.SendAsync(message, token);
    //        message.Dispose();
    //        response.EnsureSuccessStatusCode();
    //        var result = await response.Content.ReadAsStringAsync();
    //        var AjaxResult = JsonConvert.DeserializeObject<AjaxResult<string>>(result);
    //        if (AjaxResult.code == 200)
    //        {
    //            return AjaxResult.data;
    //        }
    //        else
    //        {
    //            throw new Exception(AjaxResult.msg);
    //        }
    //    }
    //    catch (TaskCanceledException)
    //    {
    //        if (token != default && token.IsCancellationRequested)
    //            throw new TaskCanceledException();
    //        else
    //            throw new Exception($"上传文件{Path.GetFileName(localFile)}到{uploadUrl}超时!");

    //    }
    //    catch (Exception ex)
    //    {
    //        throw new Exception($"上传文件{Path.GetFileName(localFile)}到{uploadUrl}失败!", ex);
    //    }
    //}

    /// <summary>
    /// 删除文件
    /// </summary>
    /// <param name="files">要删除的文件</param>
    /// <param name="baseUrl">baseUrl</param>
    /// <returns></returns>
    public static async Task<int> DeleteFileAsync(params string[] files)
    {
        string url = SysConfig.GetUrl("File/DeleteFiles");
        var factory = IocContainer.GetService<IHttpClientFactory>();
        var client = factory.CreateClient(httpKey);
        FileDeleteDto dto = new FileDeleteDto()
        {
            Files = files.ToList()
        };
        var content = new StringContent(JsonConvert.SerializeObject(dto), System.Text.Encoding.UTF8, "application/json");
        var message = new HttpRequestMessage(HttpMethod.Post, url);
        message.Content = content;
        var response = await client.SendAsync(message);
        message.Dispose();
        response.EnsureSuccessStatusCode();
        var result = await response.Content.ReadAsStringAsync();
        var AjaxResult = JsonConvert.DeserializeObject<AjaxResult<int>>(result);
        return AjaxResult.data;
    }
}

/// <summary>
/// Http接口返回泛型对象
/// </summary>
public class AjaxResult<T>
{
    /// <summary>
    /// 返回对象
    /// </summary>
    public T data { get; set; }

    /// <summary>
    /// 返回消息
    /// </summary>
    public string msg { get; set; } = "ok";

    /// <summary>
    /// 状态码.成功=200,失败=0
    /// </summary>
    public int code { get; set; } = 200;

}
/// <summary>
/// Http接口返回对象
/// </summary>
public class AjaxResult
{
    /// <summary>
    /// 返回对象
    /// </summary>
    public object data { get; set; }

    /// <summary>
    /// 返回消息
    /// </summary>
    public string msg { get; set; } = "ok";

    /// <summary>
    /// 状态码.成功=200,失败=0
    /// </summary>
    public int code { get; set; } = 200;

}