我创建了一个Web API 2项目,该项目将成为连接数据库的服务层。

现在,我有两个不同的MVC 5.2应用程序:一个网站及其CMS ...

在MVC 5.2控制器中,我想访问API以获取帖子,创建的帖子等。


如何从我的MVC控制器访问api?
我可以调用API并发送带有一张要保存的图片的帖子吗?

我怎样才能做到这一点?我应该以哪种格式发送集成在PostModel中的图像?
如何确定只有两个MVC应用程序被授权使用API​​?

所有应用程序都在同一服务器上。

最佳答案

编辑

作者评论:我只希望将服务层(Web API)与网站分开,因为我将有3个使用相同服务层的应用程序:博客,CMS和网站。如果可能的话,我感谢完整的课程。谢谢

是的,最好将其分开,不要再依赖添加作为参考。这是因为有一天您可能想在单独的服务器上进行部署。或采用不同的部署过程,实施持续集成开发过程。

因此,从我们的所有讨论中可以清楚地看出,您将实现为:



您将如何从其他.Net应用程序调用WebApi?

我要使用的最简单的方法是在.Net Framework 4.5(?)中添加的HttpClient类。

using (var client = new HttpClient())
    {
        // New code:
        client.BaseAddress = new Uri("http://localhost:9000/");
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    }



如何将图像和数据一起发送到WebApi?


您可以使用我的项目中的以下代码作为参考:

[HttpPost]
        public async Task<IHttpActionResult> UploadFileAsync()
        {
            IHttpActionResult actionResult = null;

            if (Request.Content.IsMimeMultipartContent())
            {
                // Read the file and form data.
                MultipartFormDataMemoryStreamProvider provider = new MultipartFormDataMemoryStreamProvider();
                await Request.Content.ReadAsMultipartAsync(provider);

                // get form data from  like provider.FormData["description"];
                if (!provider.FileStreams.Any())
                {
                    actionResult = BadRequest(ValidationMessages.FileNotFound);
                }
                else
                {
                    var ownerID = 0;
                    var ownerType = provider.FormData.Get("ownerType");
                    int.TryParse(provider.FormData.Get("ownerID"), out ownerID);

                    List<Document> documents = new List<Document>();

                    foreach (KeyValuePair<NameValueCollection, Stream> file in provider.FileStreams)
                    {
                        NameValueCollection fileHeader = file.Key;
                        string fileName = fileHeader.Get("FileName");
                        string contentType = fileHeader.Get("ContentType");
                        Stream stream = file.Value;


                        using (var reader = new BinaryReader(stream))
                        {
                            var fileBytes = reader.ReadBytes((int)stream.Length);

                            var document = new Document()
                            {
                                FileName = fileName,
                                Extension = Path.GetExtension(fileName),
                                Binary = fileBytes,
                                ContentType = contentType,
                                Size = fileBytes.LongLength
                            };

                            if (ownerID > 0)
                            {
                                document.RequestID = ownerID;
                            }

                            documents.Add(document);
                        }
                    }

                    if (documents.Count() > 0)
                    {
                        string exceptionMessages = string.Empty;
                        if (this.DomainService.InsertRange(documents, out exceptionMessages))
                        {
                            actionResult = Created(string.Empty, documents);
                        }
                        else
                        {
                            actionResult = BadRequest(exceptionMessages);
                        }
                    }
                    else
                    {
                        actionResult = BadRequest(ValidationMessages.FileNotFound);
                    }
                }
            }
            else
            {
                // The response to upload did not came with Multiple content;
                actionResult = BadRequest(ValidationMessages.MimeNotFound);
            }

            return actionResult;
        }


using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using System.Web;

namespace Webapi.Helper
{
    public class MultipartFormDataMemoryStreamProvider : MultipartMemoryStreamProvider
    {
        private readonly Collection<bool> _isFormData = new Collection<bool>();
        private readonly NameValueCollection _formData = new NameValueCollection(StringComparer.OrdinalIgnoreCase);
        private readonly Dictionary<NameValueCollection, Stream> _fileStreams = new Dictionary<NameValueCollection, Stream>();

        public NameValueCollection FormData
        {
            get { return _formData; }
        }

        public Dictionary<NameValueCollection, Stream> FileStreams
        {
            get { return _fileStreams; }
        }

        public override Stream GetStream(HttpContent parent, HttpContentHeaders headers)
        {
            if (parent == null)
            {
                throw new ArgumentNullException("parent");
            }

            if (headers == null)
            {
                throw new ArgumentNullException("headers");
            }


            var contentDisposition = headers.ContentDisposition;
            if (contentDisposition == null)
            {
                throw new InvalidOperationException("Did not find required 'Content-Disposition' header field in MIME multipart body part.");
            }

            _isFormData.Add(String.IsNullOrEmpty(contentDisposition.FileName));
            return base.GetStream(parent, headers);
        }

        public override async Task ExecutePostProcessingAsync()
        {
            for (var index = 0; index < Contents.Count; index++)
            {
                HttpContent formContent = Contents[index];
                if (_isFormData[index])
                {
                    // Field
                    string formFieldName = UnquoteToken(formContent.Headers.ContentDisposition.Name) ?? string.Empty;
                    string formFieldValue = await formContent.ReadAsStringAsync();
                    FormData.Add(formFieldName, formFieldValue);
                }
                else
                {
                    Stream stream = await formContent.ReadAsStreamAsync(); // File
                    /// we are not going to accept any stream that has no value!!
                    if (stream.Length > 0)
                    {
                        string fileName = UnquoteToken(formContent.Headers.ContentDisposition.FileName);

                        NameValueCollection fileHeader = new NameValueCollection();
                        fileHeader.Add("FileName", fileName);
                        fileHeader.Add("ContentType", UnquoteToken(formContent.Headers.ContentType.MediaType));
                        FileStreams.Add(fileHeader, stream);
                    }
                }
            }
        }

        private static string UnquoteToken(string token)
        {
            if (string.IsNullOrWhiteSpace(token))
            {
                return token;
            }

            if (token.StartsWith("\"", StringComparison.Ordinal) && token.EndsWith("\"", StringComparison.Ordinal) && token.Length > 1)
            {
                return token.Substring(1, token.Length - 2);
            }

            return token;
        }
    }
}


我将如何确保只有我的应用程序可以与WebApi连接?

简短的答案是,您可以通过遵循此体系结构来使用在应用程序之间共享的私钥。


网上有很多可用的代码可以帮助您解决此问题。

关于asp.net-mvc - 如何从MVC Controller访问Web Api?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/25745229/

10-17 02:01