using H5.Business;
using H5.Business.Log;
using H5.Enums;
using H5.Model;
using H5.Utility;
using Newtonsoft.Json;
using System;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.Hosting;
using System.Web.Http;
using WebSite.OfficeViewerService.Helpers;namespace WebSite.OfficeViewerService.Controllers.Api
{[RoutePrefix("api/wopi")]public class FilesController : ApiController{IFileHelper _fileHelper;HttpResponseMessage _response;ILog _log;/// <summary>/// Base constructor/// </summary>public FilesController(){_fileHelper = new FileHelper();_response = new HttpResponseMessage(HttpStatusCode.OK);_log = new DbLog(LogSource.WebLog, AppNameType.office_view);}/// <summary>/// Required for WOPI interface - on initial view/// </summary>/// <param name="name">file name</param>/// <returns></returns>
        [HttpGet][Route("files/{name}")]public CheckFileInfo Get(string name){_log.Info(new LogModel { Content = "get fileinfo by name", Op = "get_fileinfo" });return _fileHelper.GetFileInfo(name);}/// <summary>/// Required for WOPI interface - on initial view/// </summary>/// <param name="name">file name</param>/// <param name="access_token">token that WOPI server will know</param>/// <returns></returns>
        [HttpGet][Route("files/{name}")]public CheckFileInfo Get(string name, string access_token){_log.Info(new LogModel { Content = "get fileinfo by name&access_token", Op = "get_fileinfo" });return _fileHelper.GetFileInfo(name);}/// <summary>/// Required for View WOPI interface - returns stream of document./// </summary>/// <param name="name">file name</param>/// <param name="access_token">token that WOPI server will know</param>/// <returns></returns>
        [HttpGet][Route("files/{name}/contents")]public HttpResponseMessage GetFile(string name, string access_token){_log.Info(new LogModel { Content = "get file contents by name&access_token", Op = "get_fileinfo" });return DownLoadFileStream(name, access_token);}/// <summary>/// get owa file/// </summary>/// <param name="name"></param>/// <returns></returns>
        [HttpGet][Route("files/{name}/contents")]public HttpResponseMessage GetFile(string name){_log.Info(new LogModel { Content = "get file contents by name", Op = "get_fileinfo" });return DownLoadFileStream(name, string.Empty);}private HttpResponseMessage DownLoadFileStream(string name, string access_token){try{_log.InfoAsync(new LogModel { Content = name + "_" + access_token, Itcode = string.Empty, Op = "Office_View_GetFile" });              FastDFSFileBusiness fastDFSFileBusiness = new FastDFSFileBusiness();var file = fastDFSFileBusiness.FindFastDFSFileByMD5(name);if (file != null){using (WebClient webClient = new WebClient()){byte[] buffer = webClient.DownloadData(file.Url);_log.Info(new LogModel { Content = "download file success", Op = "get_fileinfo" });MemoryStream stream = new MemoryStream(buffer);_response.Content = new StreamContent(stream);_response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");}}return _response;}catch (Exception ex){_log.Error(new LogModel { Ex = ex, Op = "Office_View_GetFile_err" });_response.StatusCode = HttpStatusCode.InternalServerError;var stream = new MemoryStream(UTF8Encoding.Default.GetBytes(ex.Message ?? ""));_response.Content = new StreamContent(stream);return _response;}}}
}

using H5.Utility;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Xml.Serialization;namespace WebSite.OfficeViewerService.Helpers
{/// <summary>/// /// </summary>public class WopiAppHelper{public WopiAppHelper() { }/// <summary>/// 获取office在线预览的链接/// </summary>/// <param name="fileMD5"></param>/// <param name="ext"></param>/// <param name="fileUrl"></param>/// <returns></returns>public string GetDocumentLink(string fileMD5, string ext, string fileUrl){string apiUrl = string.Format(ConfigManager.OWA_MY_VIEW_URL, fileMD5);string findUrl = FindUrlByExtenstion(ext);if (!string.IsNullOrEmpty(findUrl)){return string.Format("{0}{1}{2}&access_token={3}", ConfigManager.OWA_URL, findUrl, apiUrl, fileMD5);}else{return fileUrl;}}/// <summary>/// 根据文件扩展名获取预览url/// </summary>/// <param name="ext"></param>/// <returns></returns>private string FindUrlByExtenstion(string ext){       if (string.IsNullOrEmpty(ext)){throw new ArgumentNullException("extension is empty.");}if (ext.IndexOf(".") >= 0){//如果包含.则进行过滤ext = ext.TrimStart('.').ToLower();}string url = string.Empty;switch (ext){case "ods":case "xls":case "xlsb":case "xlsm":case "xlsx":url = "/x/_layouts/xlviewerinternal.aspx?WOPISrc=";break;case "one":case "onetoc2":url = "/o/onenoteframe.aspx?WOPISrc=";break;case "odp":case "pot":case "potm":case "potx":case "pps":case "ppsm":              case "ppsx":case "ppt":case "pptm":case "pptx":url = "/p/PowerPointFrame.aspx?WOPISrc=";break;case "doc":case "docm":case "docx":case "dot":case "dotm":case "dotx":url = "/wv/wordviewerframe.aspx?WOPISrc=";break;default:break;}return url;}}
}