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[英]How to access mvc controller in web api controller to get pdf from view
[英]How to access Web Api from MVC Controller?
我創建了一個Web API 2項目,該項目將成為連接數據庫的服務層。
現在,我有兩個不同的MVC 5.2應用程序:一個網站及其CMS ...
在MVC 5.2控制器中,我想訪問API以獲取帖子,創建的帖子等。
如何從我的MVC控制器訪問api?
我可以調用API並發送帶有一張要保存的圖片的帖子嗎?
我怎樣才能做到這一點? 我應該以哪種格式發送集成在PostModel中的圖像?
如何確保只有兩個MVC應用程序被授權使用API?
所有應用程序都在同一服務器上。
編輯
作者評論:我只希望將服務層(Web API)與網站分開,因為我將有3個使用相同服務層的應用程序:博客,CMS和網站。 如果可能的話,我感謝完整的課程。 謝謝
是的,最好將其分開,不要再依賴添加作為參考。 這是因為有朝一日您可能想在單獨的服務器上進行部署。 或采用不同的部署過程,實施持續集成開發過程。
因此,從我們所有的討論中可以很明顯地看出,您將實現為:
您將如何從其他.Net應用程序調用WebApi?
我要使用的最簡單的方法是在.Net Framework 4.5(?)中添加的HttpClient類。
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"));
}
您可以使用我項目中的以下代碼作為參考:
[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;
}
}
}
我該如何確保只有我的應用程序可以與WebApi連接?
簡短的答案是,您可以通過遵循此體系結構來使用在應用程序之間共享的私鑰。
網上有很多代碼可以幫助您解決此問題。
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