I'm a bit out of my depth and haven't found the answer I need from Google, so could do with some advice.
I have a website that currently has some functionality build in.
I now find myself needing to create a second website containing the same functionality.
In order to do this the proper way, I want to create a webservice and access it from both sites. I've created a new solution and the webservice so far.
On my development machine, I can browse to the webservice.
The question is when I move this webservice to the live server, will it need it's own IP address, domain, or both? Or can it reside on the local server and be accessed in the same way as I would on my development machine?
The webservice does not need to be accessed from outside the server.
I'm a little unclear and its not easy to test in a live environment.
All help appreciated.
A web service works in exactly the same way as a website, only instead of returning HTML, it returns JSON/XML or similar. You'll need to host it on a web server, but if you only need it to be locally accessible, you can set the web server up to bind to localhost (127.0.0.1 in IP4) either on the default port (80) if nothing is already using it or on a different port (eg.12380 where it would be addressed as http://localhost:12380).
Most web servers can bind to anything that comes in on a specific IP address that isn't otherwise allocated or they can recognise which site to serve based on the host name that has been requested. nb. the host name isn't sent automatically by (TCP/)IP - the browser, or in this case web service client will sent an HTTP request header to let the server know which site to serve.
If you have sufficient control over the server, you can also create an entry in the hosts file to use in place of a domain name (eg. webservice maps to 127.0.0.1) and then set up your web server to bind to that.
Related
Okay so this is probably a very confusing title for this question I am sure. Hopefully I can clear up that title with the actual question.
I am putting together a website for employees to connect to that is internet facing but I want them to be able to log into the site using their Active Directory login as well as access data that will be behind a firewall that is not accessible to our internet facing sites. Someone made mention to me that I could have the site communicate with a server behind the firewall and have that server make the requests back and forth. (Sort of a check point)
So now that the back story to this is out there, I am not really looking for how to configure the server's or the network itself but rather how would one make an API call to an Intranet server from an Internet server? They will be on the same network but one behind the firewall and the other in front of the firewall.
Would you make the call directing to the server name or IP address or what? This may be too premature of a question to be asking since I still don't have the servers setup but none-the-less it is a concern I am having and need to figure out.
This site is going to be all done in ASP.NET MVC 4
The best way to accomplish this type of a setup is via firewall and/or domain configuration.
Most recently I have seen this implemented by first creating a one way trust relationship between the external and internal domains, this will serve to allow the external application to resolve the address of the internal server by name.
Theoretically you could also accomplish this by using port forwarding on the firewall; in this configuration the external application will use the address of the firewall and the firewall will take care of sending the request to the correct server.
Once this confiugration is in place your external application should be able to communicate directly with your internal servers without any special code.
I've been looking all over the site and on stack overflow and I just can solve my issue.
Network Setup
The way my network on my staging world is that I have clients looking at my web app on a 443 port - https, but the underlying structure is listening on 80 port - http. So when my apps talk to each other its on port 80, but when the clients visit the site its port 443. So for example, my svc called from silverlight would be on port 80.
I should also point out that on my staging and test domains: I have a web server acting as a portal to my app server; but this shouldn't really matter since I was able to get this working on test. It's just that staging has the HTTP forwarding to HTTPS.
Application
I have a silverlight xap file that is on the same domain as my hosted web application using IIS 6.
Now since my silverlight xap file and my web application are on the same domain, I have no problems running this on dev and test, but when I try to deploy to staging I'm getting a weird cross domain reference problem:
"System.ServiceModel.CommunicationException: An error occurred while trying to make a request to URI . This could be due to attempting to access a service in a cross-domain way without a proper cross-domain policy in place, or a policy that is unsuitable for Soap services."
Digging around, I realize that my app thinks that my xap (or the service I'm calling) and my web app are on a different domain, and looks for the crossdomain.xml and clientaccesspolicy.xml files automatically, I can't really stop it. However, in my application, this is not the case. They both reside on the same domain. I have used fiddler and I didn't see anything about another domain or even a subdomain for that matter.
Browser Issues
Another weird thing that I found out is an issue with chrome vs ie:
On chrome it finds the crossdomain.xml and clientaccesspolicy.xml telling me its insecure, then it does another fetch from the https side, signalling a 404 error. However, on IE I'm getting a 302 redirect. On microsoft's doc about clientaccesspolicy.xml you aren't supposed to do any redirects from the xml file; this is mentioned here: http://msdn.microsoft.com/en-us/library/cc838250(v=vs.95).aspx
So my question is, if my app and xap are on the same domain, why are those xmls trying to get fetched? Is it because I'm using a DNS instead of an IP address? I also stumbled upon this site: http://msdn.microsoft.com/en-us/library/ff921170(v=pandp.20).aspx
It states: To avoid cross-domain call issues, the remote modules' XAP files should be located on the same domain as the main application; when deployed like this, the Ref property on the ModuleCatalog should be a Uniform Resource Identifier (URI) relative to the main XAP file location on the Web server.
What does that even mean??
EDIT
Okay so I changed the services to point to https instead of http. However new error comes out: The provided URI scheme 'https' is invalid; expected http.
The good thing is, it doesn't even check crossdomain.xml or clientaccesspolicy.xml; so it now realizes it's on the same domain. But now it's expecting a service on port 80, but the name has to follow as https:// in order for it to work.
I think the only solution I have now is to break it off as being a virtual directory, make it a root node of its own website, and make the whole thing as 443. Save myself the headache.
It sounds like you're working in an environment where there is a load balancer offloading the SSL traffic. In this situation, your client(Silverlight) needs to be configured for HTTPS and your server must be configured for HTTP. This is because a device between the two parties is decrypting the SSL data.
In situations like this, aside from the normal client and server side configurations, your server side code needs to be a bit more forgiving about the address of the request.
You likely also need to add an attribute to your service implementation to allow your client to call over HTTPS, but have your service listening on HTTP.
Add this to your service:
[ServiceBehavior(AddressFilterMode = AddressFilterMode.Any)]
This allows your client to call https://my.domain.com/service.svc and have your server live at http://my.domain.com/service.svc.
Here are some links that might help as well:
http://social.msdn.microsoft.com/Forums/vstudio/en-US/b5ae495b-f5fb-4eed-ae21-2b2280d4fec3/address-filter-mismatch-wcf-addressing
http://www.i-m-code.com/blog/blog/2011/11/30/hosting-silverlight-over-http-under-f5-big-ip/
http://www.i-m-code.com/blog/blog/2011/08/18/hosting-silverlight-under-https/
I manage a web site for company that hired me after being unsatisfied with the original developer of the site. One function of this site is to add new patients. Part of adding the patient is to receive data from a USB port on the client machine via an applet. Since the Java 7 update 21 the applet does not work and the company has asked to remove the applet and replace it with a different solution. I am having trouble doing this, however, due to the applet listening to the client USB ports from the server to retrieve the data. I Have thought of a few ideas to solve this but am unsure if it is possible and haven't been able to find the answer online. I was hoping someone here could tell me if my idea is possible or point me in the right direction.
When the user adds a new patient the web site will call a web service on the server. This web service will then call a WCF hosted Windows Service on the client and active its serial port listener. Once the client's Windows Service has received the data the WCF will respond to the Web Service on the server and parse the data.
What I'm having trouble with is finding a way that the web service can call the WCF downloaded by the client and have it begin listening to the USB ports. If anyone could tell me how to do this, or suggest a better way to have the server initiate the client listening to the serial port I would appreciate it.
Do you have any system requirements?
When entering new patient, what kind of browsers are expected?
Will this be deployed as one solution, or clients expect that your application
can support any modern browser?
The main problem is that browsers are very restrictive in terms of what
kind of code you are allowed to execute. By default, browser won't allow
to execute any plugins / read any usb ports, let alone execution / installation
of arbitrary wcf service.
So, supposing that you have 'any modern browser' in requirements - you have following options:
Java / activex applet plugin. I believe this is the only sure-way to have access to usb
on a client machine. Also plugin must be signed with trusted certificate, or client must allow
execution of untrusted plugin (again, check requirements). I though silverlight would also
be a valid alternative, but according to my research (please correct if I am wrong) - its security
model does not allow any kind of USB access.
Prompt user to download and install browser plugin / helper object with access to usb.
And then communicate with your web page through this plugin.
Installing an entire wcf service on a client side would be an overkill in my opinion.
You would have to manage issues like firewalls, closed ports, security,
writing a self-hosting wcf solution, etc.
But if you managed to install and host a wcf service on a client side:
When the user adds a new patient the web site will call a web service on the server.
This web service will then call a WCF hosted Windows Service on the client and active its serial port listener.
Why not save a roundtrip and call client service directly from page?
Server would need to know client address to call it, which is not always possible.
Probably your web page can attempt to access localhost, at predefined port,
where your wcf service is listening.
Once the client's Windows Service has received the data the WCF
will respond to the Web Service on the server and parse the data.
It would be easier to respond on call from your web page (use polling if usb reading is slow),
and only then send to server. Browser already knows where to send data, and have permission
to do so. But if your server address is well known and can be accessed with domain name,
you can try to connect to it from your wcf on client.
Also there is a very similar topic, discussing connection to usb from client.
I am trying to test my asp.net project website for public access, so far I have done:
Uploaded to IIS 7 and binded to my localhost (192.168.....) Ok works well.
Obtained a free domain from 000webhost.com/
I tried to change the binding in IIS to the free domain mytestsite#herobo.com but apparently it's showing the webhost default page instead.
Is is possible to remain hosting all web project files in my IIS but use the free domain name so that the public can access?
I believe you need to change this on the hosting site. They should have a webpage you can use to edit your DNS records. This might be it (View Account Details)
192.168 is a private ip address. No one on the internet will be able to see you. Your ISP likely provides you with a public IP address that can support certain server tasks but many ISP's block port 80 so that home users can't start hosting web servers. That means you may need to host your site on a non-standard port.
So, in order for other people to browse to your domain and have that domain's services be handled by your local machine, you'll need to have your domain's A record (in the DNS settings for the domain) pointing to your public IP address. If your ISP assigns you a dynamic IP address, this will require updating your domain name's A record each time you are assigned a new public IP address. This can cause a period of "unavailability" as the changes to the DNS records take time to propagate.
There are services such as DynDNS that can make this rather automatic.
Then there is the issue of configuring your router (assuming it's a NAT based router), which is likely going to need to be configured to forward requests for web services (for port 80 or whatever port you end up using if you need to work around your ISP's restrictions) so that requests from the internet are forwarded to your machine. Your router likely has "port forwarding" and "dynamic dns" features built in, but it'll be manufacturer specific.
Please help me , how to add web service which is deployed in remote server. externally i unable to access that service..in that remote server only that service will run but we don't have Ms.net Environment to add service to my application in that server.
So please guide me how to add that web service to my application ,not accessig externally that service URl, internally Executing that URl.
How can i add that service to my application on my developer PC ?
To add a web reference you need to have access to the WSDL file.
You need to do this in 2 steps:
First add a web reference to your project based on the WSDL
Then change the URL of the web reference to match the address of the external service
You can move service URL to web config please refer here.
http://forums.asp.net/p/1268077/2388602.aspx
But if your IP address changes too often (Dynamic IP) I think better your remote network configuration should be changed to have some sort of redirection to your Dynamic IP via a Static IP in your outside network so you can give that Static IP as service URL.
So you don't have to change the web config even too often.
Anyway you Should get advice from a network administrator.