Can't able to access the header from webOperationContext in web API
Below code used to work with web services.
After migrating to web API it stoped working.
if (WebOperationContext.Current != null)
{
WebHeaderCollection headers = WebOperationContext.Current.IncomingRequest.Headers;
headerval=headers.Get("Name");
}
WebOperationContext.Current always returns null.
please help..
Related
I'm developing an APP to track FedEx packages using flutter. Where should I integrate FedEx web service WSDL into my code so that I can send my tracking request to FedEx and get the response back?
Currently I'm testing with another api and able to get response by sending request directly to the url of this api. But FedEx web service does not work that way and I have to use their WSDL to set the url.
Beer.fromJSON(Map<String, dynamic> jsonMap) :
id = jsonMap['id'],
name = jsonMap['name'],
tagline = jsonMap['tagline'],
description = jsonMap['description'],
image_url = jsonMap['image_url'];
}
Future<Stream<Beer>> getBeers() async {
final String url = 'https://api.punkapi.com/v2/beers';
final client = new http.Client();
final streamedRest = await client.send(
http.Request('get', Uri.parse(url))
);
return streamedRest.stream
.transform(utf8.decoder)
.transform(json.decoder)
.expand((data) => (data as List))
.map((data) => Beer.fromJSON(data));
}
WSDL isn't something you import into your app, or at least not with dart. It describes the requests that can be made to the various endpoints their server supports.
Fedex's documentation does a better job explaining than I could:
A SOAP request to, or response from a service is generated according to the service’s WSDL definition.
A WSDL is an XML document that provides information about what the service does, the methods that are available, their parameters, and parameter types. It describes how to communicate with the service in order to generate a request to, or decipher a response from, the service.
The purpose of a WSDL is to completely describe a web service to a client. A WSDL generally defines where the service is available and which communication protocol is used to talk to the service. It defines everything required to write a program that will work with an XML web service.
There's a good chance that the endpoint actually uses SOAP for the communication, which dart doesn't currently fully support. You're going to have to use something like dart:xml to generate requests that match the description in the WSDL, and then you can send them with the http.Client the same way as you have done for the other API.
I need to write a web service and host it in Azure. This service in turn consumes another service from an external site. Therefore, my azure-hosted service is a client to this externally-hosted service. When I make a request of the other service, I need to include a client-side certificate in my request.
Has anybody successfully done this? Is it possible to install a certificate in a web instance in azure? Would it survive the instance restarting? If so, pointers would be appreciated.
I have never worked with client-side certificates (even on a "real" client) so please forgive me if this is a newbee question.
The certificates that are uploaded in the cloud service (see the certificates tab under that cloud service in azure portal), which will host your webrole, will be available in the VM of that webrole. So you can access it from the certificate store and use it while making the external web service call.
A sample is given in this stackoverflow post.
Accessing a web service and a HTTP interface using certificate authentication
You can either add certificate via azure management portal, and azure will add it to machine certificate store once it deploy your application on the VM, or you can keep it with your application, for example as embedded resource and load it manually and use with your webservice call. Like this :
private X509Certificate2 GetAuthCertificate()
{
var assembly = Assembly.GetExecutingAssembly();
Stream stream = null;
var resources = assembly.GetManifestResourceNames();
foreach (var resource in resources)
{
if (resource.EndsWith(certificateFilename))
{
stream = assembly.GetManifestResourceStream(resource);
break;
}
}
if (stream == null)
throw new Exception("Certificate not found in embedded rersources");
using (var ms = new MemoryStream())
{
stream.CopyTo(ms);
var result = new X509Certificate2(ms.ToArray(), "password", X509KeyStorageFlags.Exportable);
return result;
}
}
I found So many Answers but haven't got one suits my (Basic) "Knowledge"
These are Troubling For me , kindly Guide me
I know what API is (from the local concept like GetCursorPos() winApi of user32.dll)
Q: what is WebApi ?
Ans : web API is a API which is exposed via the web
Q:what is WebService ?
Ans : is a software function provided at a network address over the web
My Doubts:
is a WebApi used to Achieve a Service through web ? Acess a WebService ?
What Differs WebService and Web API ?
The Following Makes me again Weird :
A Web services describes a standardized way of integrating Web-based applications using the XML, SOAP, WSDL and UDDI open standards over an Internet protocol backbone.
A web API is a development in web services where emphasis has been moving to simpler representational state transfer (REST) based communications
Then What is this Web API For ?
Also Seen that WebServices = API + Http ( Api refers to Web Api? )
What are Web Service API ?
Web Services:
To achieve the platform interoperability Web Services are being used, and it is a SOA based. It follows standards like WSDL,SOAP, UDDI and so on. WSDL passed through SOAP protocol and will be accessed by clients, by having stubs generated out of WSDL.
Web API:
Now a days a new paradigm of achieve the platform independent services are done by RESTful web services or Web API's. It rely on HTTP protocol, and these services will be accessed by HTTP clients like browser or a HTTP client code. WebAPI is an another name to describe these both client and server API's.
Hope it makes clear
I'm working with gSOAP 2.8.15 and I'm trying to implement the HTTP Authentication by following the instructions in section 19.14 of gsoap documentation (http://www.cs.fsu.edu/~engelen/soapdoc2.html#tth_sEc19.14).
The only difference is that the codes introduced in the documentation is written in C but I'am coding in C++.
Here is my codes for client side of the web service
// The variable wsp is a instance of web service proxy generated by soapcpp2.
// The proxy is a sub-class of the class soap
wsp.userid = "user";
wsp.passwd = "password";
// call the function of web service
wsp.get_version(&result);
In the server side, I use these codes to check the authentication:
// The variable wss is the a instance of web service service generated by soapcpp2.
if (wss.userid == NULL || wss.passwd == NULL)
//......
The problem is when I call the function of web service using the client-side code, the userid and passwd is always NULL in server-side. But when I call the same function using soapUI by passing the userid and passwd with preemptive authorisation mode, the server will get the information without problem.
I appreciate if anyone can help me work out the problem. Thanks for your attention.
I have used tcpdump to catch the package sent between web service server and client and I found that there is no http header sent when the client call the function of the web service. So I have done some search in the documentation of gSOAP and found this sentence:
A client may use the http:// prefix. When absent, no HTTP header is
sent and no HTTP-based information will be communicated to the
service.
It solves my problem...
I have two servlets that access two corresponding Axis2 web services on the same host. One of the servlets is read-only, while the other writes to a database.
Each of the Axis2 web services uses BASIC authentication. The read-only web service uses a system account, while the write web service uses the user's credentials (which are submitted as part of a web form).
The problem I'm running into is that the servlet called second always fails authentication to its web service. For example, I can query the read-only service through it's servlet all I want, but I get a "401: Authorization Required" when I try to use the write service. If I call the write service first, I get the same error when I try to use the read-only service.
Here is how I am setting the credentials for the connections in the servlets:
Stub service = new Stub(serviceUrl);
HttpTransportProperties.Authenticator auth = new HttpTransportProperties.Authenticator();
auth.setUsername(username);
auth.setPassword(password);
auth.setPreemptiveAuthentication(true);
service._getServiceClient().getOptions().setProperty(HTTPConstants.AUTHENTICATE, auth);
The servlet that accesses the read-only service has this code in it's constructor. The servlet that accesses the write service has this code in it's doGet/doPost method.
It seems that the credentials for the first service called are getting cached somewhere, but I can't find where that could be. I saw a possible solution here, but I can't find where WSClientConstants.CACHED_HTTP_STATE is defined. The comments in this JIRA issue seems to imply that it's part of org.apache.axis2.transport.http.HTTPConstants but it's not there.
Specifics:
Axis version: 1.5.1
Tomcat Version: 6.0.26
Java version: 1.6.0_23
It turns out the connections to the two different services were using the same JSESSIONID. Thus, the connection to the second web service was trying to use a session authenticated for the first web service, causing the error.
My solution for this was to define an HttpClient for each service, done by the following
MultiThreadedHttpConnectionManager manager = new MuliThreadedHttpConnectionManager();
HttpClient client = new HttpClient(manager);
ConfigurationContext context = ConfigurationContextFactory.createDefaultConfigurationContext();
context.setProperty(HTTPConstants.CACHED_HTTP_CLIENT, client);
context.setProperty(HTTPConstants.REUSE_HTTP_CLIENT, true);
Stub service = new Stub(context, serviceUrl);
This allows both servlets to have a separate session for their corresponding services.
The important point is to create a dedicated ConfigurationContext.
I've solved in a simpler way using a default config context when creating the stub without the multithreaded connection factory
stub = new MyStub(ConfigurationContextFactory.createDefaultConfigurationContext(), myServicesUrl);