Using WebClient or WebRequest in web method.

[Jensen Bredhal]

Hello,

I need to send command to a web server from a method.

I understand this should be possible using the WebClient or WebRequest
class.

how can this be done?

below an example of my HTTP based command to the server:

An API invocation is simply an HTTP request (GET or POST), like this:

http://www.mydomain.com/desknow/admin?pwd=password&action=im_sendalert&user=joe&domain=mydomain.com&message=emergency%20evacuation&alertcode=1

[Dino Chiesa [Microsoft]]

Re: Using WebClient or WebRequest in web method.

Get:
public static string GetURI(string URI) {
System.Net.WebR equest myWebRequest =
System.Net.WebR equest.Create(U RI);
myWebRequest.Pr oxy = new System.Net.WebP roxy(ProxyStrin g, true); //
true == don't use proxy for local addresses
System.Net.WebR esponse response = myWebRequest.Ge tResponse();
System.IO.Strea mReader reader = new System.IO.Strea mReader
(response.GetRe sponseStream()) ;
return reader.ReadToEn d().Trim();
}

Post is different
public static string PostURI(string URI, string Parameters) {
System.Net.WebR equest req = System.Net.WebR equest.Create(U RI);
req.Proxy = new System.Net.WebP roxy(ProxyStrin g, true); // true ==
don't use proxy for local addresses
req.ContentType = "applicatio n/x-www-form-urlencoded";
req.Method = "POST";
byte [] bytes = System.Text.Enc oding.ASCII.Get Bytes(Parameter s);
req.ContentLeng th = bytes.Length;
System.IO.Strea m OutputStream = req.GetRequestS tream ();
OutputStream.Wr ite (bytes, 0, bytes.Length);
OutputStream.Cl ose ();
System.Net.WebR esponse resp = req.GetResponse ();
if (resp== null) return null;
System.IO.Strea mReader MyStreamReader = new
System.IO.Strea mReader(resp.Ge tResponseStream ());
return MyStreamReader. ReadToEnd().Tri m();
}

If you need authentication, you need to add that yourself.

-D


"Jensen Bredhal" <first.last@yah oo.com> wrote in message
news:OpOyY1KzEH A.3184@TK2MSFTN GP10.phx.gbl...[color=blue]
>
> Hello,
>
> I need to send command to a web server from a method.
>
> I understand this should be possible using the WebClient or WebRequest
> class.
>
> how can this be done?
>
> below an example of my HTTP based command to the server:
>
> An API invocation is simply an HTTP request (GET or POST), like this:
>
> http://www.mydomain.com/desknow/admi...on&alertcode=1
>
>
>
>
>
>
>
>
>
>[/color]

[Jensen Bredal]

Re: Using WebClient or WebRequest in web method.

thousands thanks...


JB


"Dino Chiesa [Microsoft]" <dinoch@online. microsoft.com> wrote in message
news:eTBTAlMzEH A.3120@TK2MSFTN GP12.phx.gbl...[color=blue]
> Get:
> public static string GetURI(string URI) {
> System.Net.WebR equest myWebRequest =
> System.Net.WebR equest.Create(U RI);
> myWebRequest.Pr oxy = new System.Net.WebP roxy(ProxyStrin g, true); //
> true == don't use proxy for local addresses
> System.Net.WebR esponse response = myWebRequest.Ge tResponse();
> System.IO.Strea mReader reader = new System.IO.Strea mReader
> (response.GetRe sponseStream()) ;
> return reader.ReadToEn d().Trim();
> }
>
> Post is different
> public static string PostURI(string URI, string Parameters) {
> System.Net.WebR equest req = System.Net.WebR equest.Create(U RI);
> req.Proxy = new System.Net.WebP roxy(ProxyStrin g, true); // true ==
> don't use proxy for local addresses
> req.ContentType = "applicatio n/x-www-form-urlencoded";
> req.Method = "POST";
> byte [] bytes = System.Text.Enc oding.ASCII.Get Bytes(Parameter s);
> req.ContentLeng th = bytes.Length;
> System.IO.Strea m OutputStream = req.GetRequestS tream ();
> OutputStream.Wr ite (bytes, 0, bytes.Length);
> OutputStream.Cl ose ();
> System.Net.WebR esponse resp = req.GetResponse ();
> if (resp== null) return null;
> System.IO.Strea mReader MyStreamReader = new
> System.IO.Strea mReader(resp.Ge tResponseStream ());
> return MyStreamReader. ReadToEnd().Tri m();
> }
>
> If you need authentication, you need to add that yourself.
>
> -D
>
>
> "Jensen Bredhal" <first.last@yah oo.com> wrote in message
> news:OpOyY1KzEH A.3184@TK2MSFTN GP10.phx.gbl...[color=green]
> >
> > Hello,
> >
> > I need to send command to a web server from a method.
> >
> > I understand this should be possible using the WebClient or WebRequest
> > class.
> >
> > how can this be done?
> >
> > below an example of my HTTP based command to the server:
> >
> > An API invocation is simply an HTTP request (GET or POST), like this:
> >
> >[/color][/color]
http://www.mydomain.com/desknow/admi...on&alertcode=1[color=blue][color=green]
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >[/color]
>
>[/color]

[Jensen Bredal]

Re: Using WebClient or WebRequest in web method.

Now i'm a bit more confused then before. If this request needs several
parameters as it is the case for my situation ,
how can i use your code?
Could you please provide a simple example with the query i have provided in
my original post?


Many thanks

[Dino Chiesa [Microsoft]]

Re: Using WebClient or WebRequest in web method.

in the HTTP GET scenario, all params go on the URL itself.
you are responsible for formatting the URL in a way that makes sense for the
receiving server.
The link you posted looks fine. Do a GetURI on it and see what you get
back.

For the PostURI, then you need to pass in a string of params, formatted like
so
param1=foo&para m2=bar&param3=g ee

ref: http://www.jmarshall.com/easy/http/h...ml#urlencoding

the caller of the PostURI() method is responsible for formatting the params
in this format.
This is described here:
http://www.faqs.org/rfcs/rfc1866.html

if the data is more complex (eg, you want to upload files), you can do
multi-part data encoding, which is described here
http://www.faqs.org/rfcs/rfc2388.html

but you would need to change the code I provided in order to make this work.

-Dino




"Jensen Bredal" <first.last@yah oo.dk> wrote in message
news:%23bXJKiXz EHA.2656@TK2MSF TNGP14.phx.gbl. ..[color=blue]
> Now i'm a bit more confused then before. If this request needs several
> parameters as it is the case for my situation ,
> how can i use your code?
> Could you please provide a simple example with the query i have provided
> in
> my original post?
>
>
> Many thanks
>
>
>
>
>[/color]

[Drew Marsh]

Re: Using WebClient or WebRequest in web method.

Jensen Bredal wrote:
[color=blue]
> Now i'm a bit more confused then before. If this request needs several
> parameters as it is the case for my situation ,
> how can i use your code?
> Could you please provide a simple example with the query i have
> provided in
> my original post?[/color]

Well, you said yourself it's just an HTTP GET or POST, right? There's not gonna be any magic for you from WebClient/Request, you just need to build the querystring/form data yourself. Here's how you'd POST:

<codeSnippet language="C#">
HttpWebRequest request = (HttpWebRequest )WebRequest.Cre ate("http://www.mydomain.co m/desknow/admin");
request.Method = "POST";
request.Content Type = "applicatio n/x-www-form-urlencoded";

using(StreamWri ter writer = new StreamWriter(re quest.GetReques tStream()))
{
writer.Write("p wd=password&act ion=im_sendaler t&user=joe&doma in=mydomain.com &message=emerge ncy%20evacuatio n&alertcode=1") ;
}

WebResponse response = request.GetResp onse();

// TODO: make sure it worked
</codeSnippet>

HTH,
Drew

[Jensen Bredal]

Re: Using WebClient or WebRequest in web method.

Great!

Many thanks...