I've been developing a web project and using .json files to retrieve data via $.ajax calls on the client. Those calls all use POST, because parameters will be passed, etc.
When I put the .json files in the application, I receive a 405 error, complaining that I cannot POST to that file. I assume it wants me to use GET, but I want to use POST so that I don't have to change the way those methods are written when we move them to Controller Action calls, or Web Api, etc.
How can I allow a POST to a static .json file in an MVC project?
Any help is most appreciated.
The reason you can not POST to those files is because you don't have any handlers (PHP, ASPNET, etc) associated with .json files that can handle the POST verb.
A really easy work-around is to make a JsonController controller with actions corresponding to your views..
VB - you can translate
<ActionName("AJsonFile.json")>
Public Function AJsonFile As JsonResult
' Return the .json file content
End Function
That way you can keep your views as .cshtml files, which are registered with the asp net processor, and not have to worry about mapping a new file type.
Related
I'm developing a dll that is supposed to be commonly used (in nuget for example). Simple description: my DLL simplifies message exchange with a particular service. It allows to send a request, then retrieve a response. Service is asynchronous and it can create a response in a hour or a day after accepting a request, so after making a request my dll calls service every few minutes to check out for response. The problem is that the app that uses the dll can be restarted therefore storing a request queue in memory isn't a good option (I don't want to lose info about requests). Neither is serializing it to file, because I can't know for sure where my dll will be used - it could be pc app, mvc. My main options is: serialize to file, but give an option to set a address where to place serialized files via web/app.config or make a user to think about it. But maybe there is some better solution about how to store requests queue?
I would put theses type of configuration or data files in a subfolder to the %appdata% folder. You will have write access to files in this folder and the documentation is extensive. Read more here.
in C# you can easily get this folder using:
var appdata = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
Or use Program Data:
var programdata = Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);
I have an app which uploads an xml to the server via ajax and does some processing liking parsing,schema validation,connecting to the db based on the conn string present in the xml data.These validations,connection and data extraction is being done in the same function of the controller. I want to update my viewer the steps that has already been completed. Since I cannot return the function ,so I created a file in which the the given function will write the update and another ajax call via different function of the same controller will read the file and display it on the page.This is working fine except that if i connect to the app from two browsers the information get overlapped. What other alternative can you suggest?
Are you using dotnet 4.5? Would it be possible for you to use SignalR, at various points your controllers action to send back progress messages to the browser?
You should also consider using Async methods
This is my first time developing this kind of system, so many of these concepts are very new to me. Any and all help would be appreciated. I'll try to sum up what I'm doing as efficiently as possible.
Background: I have a web application running AngularJS with Bootstrap. The app communicates with the server and DB through a web service programmed using C#. On the site, users can upload files and reference them later using direct links. There's no restriction to file type (yet), so just about anything is allowed.
My Goal: Having direct links creates a big security problem for me, since the documents/images are supposed to be private data. What I would prefer to do is validate a user's credentials when the link is clicked, then load the file in the browser using a more generic url path.
--Example--
"mysite.com/attachments/1" ---> (Image)
--instead of--
"mysite.com/data/files/importantImg.jpg"
Where I'm At: Not very far. My first thought was to add a page that sends the server request and receives a file byte stream along with mime type that I can reassemble and present to the user. However, I have no idea if this is possible using a web service that sends JSON requests, nor do I have a clue about how the reassembling process would work client-side.
Like I said, I'll take any and all advice. I'd love to learn more about this subject for future projects as well, but for now I just need to be pointed in the right direction.
Your first thought is correct, for it, you need to use the Response object, and more specifically the AddHeader and Write functions. Of course this will be a different page that will only handle file downloads, so it will be perfectly fine in your JSON web service.
I don't think you want to do this with a web service. Just use a regular IHttpHandler to perform the validation and return the data. So you would have the URL "attachments/1" get rewritten to "attachments/download.ashx?id=1". When you've verified access, write the data to the response stream. You can use the Content Disposition header to set the file name.
I am trying to read the contents of a JSON file sitting in my github pages repository.
I can navigate and see the file contents in my browser if I specify the url.
If I use the code here:
http://www.codeproject.com/Tips/397574/Use-Csharp-to-get-JSON-Data-from-the-Web-and-Map-i?msg=4615047#xx4615047xx
It claims to "just work", but it doesn't.
All I get back is:
<html><frameset><frame src="URL-TO-JSON-FILE"></frameset></html>
How am I supposed to read the json file and get its contents back as a string. I am using c#?
Once I get the JSON string back I can do the processing I need to do in c#.
EDIT:
According to rawgithub.com those types of urls are not to be used for production. I need this for production. How do production website read remote JSON files that are located on a webserver?
Thank you
Sometimes in github, if you wish to use code from a repository, you must change the url to raw.github.com/ or click on the raw button and use this url.
I'm having trouble with paths in a ASP.NET MVC application that's running behind a proxy.
Our IIS Application root path is for example http://server/MyApp/
meaning that all urls using the application root ("~/",Url.Action("MyAction","MyController")) are resolved to "/MyApp"
Now we're running behind a proxy server that forwards all requests, but requires you to access the application through a URL like this:
"/Secury/Proxy/RubbishUrl/MyApp"
Because the proxy url is only available on the client, I thought of creating a cookie with the path prefix, and insert this before each generated URL on the server.
Now the question is, what's the best location in code to modify each URL that's resolved/sent to the client (to resources, controller actions, images etc)?
Every path in the application is resolved with the MVC methods (Url.Content, Url.Action etc).
Update:
Not actively looking for an answer anymore (though still interested in a proper solution)
Most of the time Proxies do their own URL translation, however in this case the proxy server is ignoring paths that are transfered in JSON, and they are processed.
My 'solution' for now is just not passing paths in JSON, but instead:
using proper ID's and values in the JSON requests
creating template in URL's in the HTML (which are resolved properly),
replace the ID's and values in the URL template with the values from the JSON requests
This method is actually a much 'cleaner' way IMO then passing the URL's.
You can create your own asp.net mvc controller factory where to decide which controller and action will serve the response based on the requested url. Check this url for a good blog post on how to do this - http://nayyeri.net/custom-controller-factory-in-asp-net-mvc.