If you’re following along with the post on creating a WOPI host, it’s never fully apparent that you MUST adhere to the path shown in the article here:
http://blogs.msdn.com/b/officedevdocs/archive/2013/03/20/introducing-wopi.aspx
That is, the path to your host must contain ‘/wopi/files’. It wasn’t clear to me in that article, nor could I find it in the WOPI spec. http://msdn.microsoft.com/en-us/library/hh622722(v=office.12).aspx
So, for example, here are some Routes I used in MVC
config.Routes.MapHttpRoute(
name: "Contents",
routeTemplate: "api/wopi/files/{name}/contents",
defaults: new { controller = "files", action = "GetFile" }
);
config.Routes.MapHttpRoute(
name: "FileInfo",
routeTemplate: "api/wopi/files/{name}",
defaults: new { controller = "Files", action = "Get" }
);
Here are the Actions
public class FilesController : ApiController
{
IFileHelper _fileHelper;
public FilesController() : this(new FileHelper())
{
}
public FilesController(IFileHelper fileHelper)
{
_fileHelper = fileHelper;
}
/// <summary>
/// Required for WOPI interface - on initial view
/// </summary>
/// <param name="name"></param>
/// <param name="access_token"></param>
/// <returns></returns>
public CheckFileInfo Get(string name, string access_token)
{
var fileInfo = _fileHelper.GetFileInfo(name);
return fileInfo;
}
/// <summary>
/// Required for View WOPI interface - returns stream of document.
/// </summary>
/// <param name="name"></param>
/// <param name="access_token"></param>
/// <returns></returns>
public HttpResponseMessage GetFile(string name, string access_token)
{
try
{
var file = HostingEnvironment.MapPath("~/App_Data/" + name);
var rv = new HttpResponseMessage(HttpStatusCode.OK);
var stream = new FileStream(file, FileMode.Open, FileAccess.Read);
rv.Content = new StreamContent(stream);
rv.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
return rv;
}
catch (Exception ex)
{
var rv = new HttpResponseMessage(HttpStatusCode.InternalServerError);
var stream = new MemoryStream(UTF8Encoding.Default.GetBytes(ex.Message ?? ""));
rv.Content = new StreamContent(stream);
return rv;
}
}
}
And here is the helper
public interface IFileHelper
{
CheckFileInfo GetFileInfo(string name);
}
public class FileHelper : IFileHelper
{
public CheckFileInfo GetFileInfo(string name)
{
var fileName = GetFileName(name);
FileInfo info = new FileInfo(fileName);
string sha256 = "";
using (FileStream stream = File.OpenRead(fileName))
using (var sha = SHA256.Create())
{
byte[] checksum = sha.ComputeHash(stream);
sha256 = Convert.ToBase64String(checksum);
}
var rv = new CheckFileInfo
{
BaseFileName = info.Name,
OwnerId = "admin",
Size = (int)info.Length,
SHA256 = sha256,
Version = DateTime.Now.ToString("s")
};
return rv;
}
internal string GetFileName(string name)
{
var file = HostingEnvironment.MapPath("~/App_Data/" + name);
return file;
}
}