Currently, I have a web based C# application (ServiceStack) that has an XML file it relies on to generate things client side. I no longer want to store this file on the client side. I need a way to use the repository I wrote to edit the file when it is stored on the server.
I have tried the following:
Finding the file location of XML when in the service. (it says that the service current directory is windows/system32, because it's running as a service. Makes sense now.)
Putting the file in the same project side by side. (same problem)
This already works:
Retrieves XML ( With hard coded path :c )
Deserialize XML
Add/Remove to XML as needed
Save
The key thing to this problem is it must live where the API lives. I don’t think that I am understanding the way this works very well, and I'd greatly appreciate some help.
Use System.Web.Hosting.HostingEnvironment.MapPath to find the path of the file relative to your application, assuming it's hosted via IIS.
In ServiceStack you'd normally use the Virtual File System to resolve files, e.g:
base.VirtualFileSources.GetFile("path/to/file.xml").ReadAllText()
Otherwise if you just want the path you can use IAppHost.MapProjectPath() available from v4.5.4 to resolve a file path relative to your WepApp consistently in all App Hosts, e.g:
HostContext.AppHost.MapProjectPath("~/path/to/file.xml")
Related
I have been working on project recently where eventually I need two (or more) applications on different machines to be able to access the same file on one of them without uploading it to a server first.
Thus, the best idea I could get was to create something like a mini-temporary file server where the desired file path is streamed over the ip address and the other machine can access it via a URL like that "http://xxx.xxx.xxx.xxx/path/file.ext".
I have a good experience with C# but this approach... I never stepped into before, so any help is appreciated either in achieving this approach or any other method that can lead to allowing cross-internet access to a file on a machine.
Thanks in advance.
[Edit]
This operation has to be done without prior port forwarding, I don't know if this is possible, but I guess if it is not then I might need to do something like streaming to a php server first or something, again any help is appreciated.
Set up a virtual directory pointing to a local directory in IIS.
Application A writes file to local directory.
Application B reads
file from http.
Otherwise, you could use a network drive for both applications to read/write from.
Well, I've been working on my server with a method like the following:
System.Web.HttpContext.Current.Server.MapPath("/path/something");
... and it's been working so far. Nevertheless, now I've encountered an issue. The thing is, I need to write a file that's located on an external server. Is there a method in C# to do this?
Server.mappath is designed to convert web based paths to local paths based on the location of the webroot, and is not strictly speaking relevant when trying to access external resources.
The only exception being when a remote file location is used as part of a websites file system. E.G. If your website has a folder in it called "/remotefiles/", and within IIS you have mapped this folder to a remote network path. MapPath would work as normal and you will retrieve a full UNC path.
If the server you want to access is on the same network as your web server but not referenced as part of your webroot, then you should look at directly referencing the location in question using a full UNC path. E.G. "\\ExternalServer\CDrive\SomeStuff\".
If the server is remotely accessed over a wider network, then you will need to look into another form of access.
I have an ELB application that we have just added photo upload functionality to. Currently this saves the images in a folder within the deployment directory in ELB, saving the URL to a DynamoDb table. Everything works fine. Whenever a user wants to see an image we simply attach the URL to the src attribute of an tag in the UI and the browser downloads the image directly.
However it occurred to me that if the underlying EC2 instance is terminated and re-started we will most likely lose all the photos. Am I correct in this assumption? If so, what's the best practice here? Should uploads always be saved in an S3 bucket? Any guidance hugely appreciated.
Should uploads always be saved in an S3 bucket?
TL;DR
In an elastic cloud environment, yes always move your static content to reliable external storage (in this case S3). It will make your app scale better. See the S3 question here
Resources:
IAM Credentials Giving your app keys to access s3 right out of the box in Beanstalk.
S3 Getting Started
Media Reference Architecture Describes at least part of what you're looking for. Look at the S3/Datastore/Web Server interaction there. More here.
Longer Description
In a traditional architecture you might have a drive attached to a web server or two and you store the files there. You always expect those to be up. If you run out of disk space you have a problem. If you're server craps out, you've also got a problem. Even if you have a backup, you run the risk of both going down and you needing to restore all your data AND bringing up a server manually.
In a cloud architecture you're basically admitting that the "machine" is fallible and no longer relying on it to store any application state. It should be used to store things you need on disk to launch the app and/or temporary storage, but if you need something long term thats why services like S3 exist! By eliminating state from your app servers you can scale them automatically (however you see fit) without worrying about your users' content. If you had other services that needed that content, they could get it from there as well with the proper permissions.
I need to get physical path in silverlight. I'm using WCF service, I created one folder called 'Myfolder'. So I need to get the path of myfolder Please help me.
Silverlight doesn't allow direct access to the file system. However you can take advantage of Isolated Storage to read and write files on the client side. Here is a tutorial for that.
If you need access to a folder in the web application that is hosting your Silverlight app, use your service. Once you are in your OperationContract method, or even if you leverage the WebClient to make an AJAX style request, you can access the file system on the server but remember that is a different machine than your Silverilght client with the exception of when you do development (or browse your app on the server).
I am building my own web server and want to serve from it a Silverlight application. Is there anything else I have to do besides setting the mime type and pushing the application through the wire?
It probably makes no difference, but the web-server is in C# (the micro-edition).
No, silverlight is all run on the client, so unless you want to do some webservices or whatever, you needn't do anything other than set the mime-type.
It is really just like a separate file that you serve to the client, just like any image, script or css file.
If you are developing a single Silverlight application that you want to deliver then you need only serve the XAP.
However if you are not the application developer or you want to deliver multiple apps effeciently then your web server needs also to be able to deliver other files that may come along with these apps. For example the libraries may be be delivered as zip files and they may download external images and XML files. Still this is all likely to be simple static content you will not normally need to implement other services.
Note if you are hosting an app to be referenced by a HTML file served by some other server then you need to get your site to respond with appropriate XML when SL requests the clientaccesspolicy.xml file.