cpp-netlib-devel

[cpp-netlib-devel] HTTP Server - Set response Content-Type

[David H. <dav...@gm...>]

Howdy all,

I've just started working with cpp-netlib and I am trying to get an HTTP
server (not asynchronous) working with different mime Content-Types.

I see that the FileServer example sets the mime-type for different responses
in the asynchronous server connection_ptr but I can't get anything like it
to work for a simple synchronous server response.

Can anyone give an example of how to set the Content-Type header for a
simple synchronous server response?

Thanks,
-Dave-

Re: [cpp-netlib-devel] HTTP Server - Set response Content-Type

[Raindog <ra...@ma...>]

On 1/9/2011 1:32 PM, David Hite wrote:
> Howdy all,
>
> I've just started working with cpp-netlib and I am trying to get an
> HTTP server (not asynchronous) working with different mime Content-Types. 
>
> I see that the FileServer example sets the mime-type for different
> responses in the asynchronous server connection_ptr but I can't get
> anything like it to work for a simple synchronous server response.
>
> Can anyone give an example of how to set the Content-Type header for a
> simple synchronous server response?
>
> Thanks,
> -Dave-


    http_client_t::request login_req(url);
    http_client_t client;

    login_req << net::header("Content-Length",
boost::lexical_cast<std::string>(auth_string.length()));
    login_req << net::header("Content-Type",
"application/x-www-form-urlencoded");
    login_req << net::body(auth_string);
    http_client_t::response auth_resp = client.post(login_req);

Re: [cpp-netlib-devel] HTTP Server - Set response Content-Type

[Dean M. B. <mik...@gm...>]

Hi David,

On Mon, Jan 10, 2011 at 5:32 AM, David Hite <dav...@gm...> wrote:
> Howdy all,
> I've just started working with cpp-netlib and I am trying to get an HTTP
> server (not asynchronous) working with different mime Content-Types.
> I see that the FileServer example sets the mime-type for different responses
> in the asynchronous server connection_ptr but I can't get anything like it
> to work for a simple synchronous server response.
> Can anyone give an example of how to set the Content-Type header for a
> simple synchronous server response?

Certainly. If you look in
libs/network/test/http/server_hello_world.cpp there is an example of
setting the headers for the response of a synchronous HTTP server.
What you'll need to remember is that the response object passed by
lvalue reference to the handler has a member named `headers` where you
would put all the headers you want.

In your handler's operator() overload, you would have something like this:

  server::response::header_type content_type = {"Content-Type",
"application/octet-stream"};
  response.headers.push_back(content_type);

This is at least true for the version in the 0.9-devel branch. If
you're on 0.8, you would need code that looks like this:

  server::response_header content_type = {"Content-Type",
"application/octet-stream"};
  response.headers.push_back(content_type);


> Thanks,
> -Dave-

I hope this helps!

-- 
Dean Michael Berris
about.me/deanberris

Re: [cpp-netlib-devel] HTTP Server - Set response Content-Type

[David H. <dav...@gm...>]

Hey Dean,
Thanks for the quick reply.
I can't find the example you are talking about... i'm using 0.8 version.

I'm also getting some compile errors when I try to push the content-type
header on the response.headers

Here's my code:

    Server::response_header content_type = {"Content-Type",
"application/vnd.google-earth.kml+xml"};

    // set message in response
    response = Server::response::stock_reply(Server::response::ok,
kml_string);

    // set MIME type for response
    response.headers.push_back( content_type );

And here's my error:

error: no matching function for call to
'std::vector<boost::network::http::request_header<boost::network::http::tags::http_server>,
std::allocator<boost::network::http::request_header<boost::network::http::tags::http_server>
>
>::push_back(boost::network::http::response_header<boost::network::http::tags::http_server>&)'
/usr/include/c++/4.4/bits/stl_vector.h:733: note: candidates are: void
std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp =
boost::network::http::request_header<boost::network::http::tags::http_server>,
_Alloc =
std::allocator<boost::network::http::request_header<boost::network::http::tags::http_server>
>]

These error messages are impossible to decipher... any ideas?
The only candidate function it's listing is using
boost::network::http::request_header. I tried that too and no dice.

-Dave-


On Sun, Jan 9, 2011 at 9:41 PM, Dean Michael Berris
<mik...@gm...>wrote:

> Hi David,
>
> On Mon, Jan 10, 2011 at 5:32 AM, David Hite <dav...@gm...> wrote:
> > Howdy all,
> > I've just started working with cpp-netlib and I am trying to get an HTTP
> > server (not asynchronous) working with different mime Content-Types.
> > I see that the FileServer example sets the mime-type for different
> responses
> > in the asynchronous server connection_ptr but I can't get anything like
> it
> > to work for a simple synchronous server response.
> > Can anyone give an example of how to set the Content-Type header for a
> > simple synchronous server response?
>
> Certainly. If you look in
> libs/network/test/http/server_hello_world.cpp there is an example of
> setting the headers for the response of a synchronous HTTP server.
> What you'll need to remember is that the response object passed by
> lvalue reference to the handler has a member named `headers` where you
> would put all the headers you want.
>
> In your handler's operator() overload, you would have something like this:
>
>  server::response::header_type content_type = {"Content-Type",
> "application/octet-stream"};
>  response.headers.push_back(content_type);
>
> This is at least true for the version in the 0.9-devel branch. If
> you're on 0.8, you would need code that looks like this:
>
>  server::response_header content_type = {"Content-Type",
> "application/octet-stream"};
>  response.headers.push_back(content_type);
>
>
> > Thanks,
> > -Dave-
>
> I hope this helps!
>
> --
> Dean Michael Berris
> about.me/deanberris
>
>
> ------------------------------------------------------------------------------
> Gaining the trust of online customers is vital for the success of any
> company
> that requires sensitive data to be transmitted over the Web.   Learn how to
> best implement a security strategy that keeps consumers' information secure
> and instills the confidence they need to proceed with transactions.
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
> Cpp-netlib-devel mailing list
> Cpp...@li...
> https://lists.sourceforge.net/lists/listinfo/cpp-netlib-devel
>

Re: [cpp-netlib-devel] HTTP Server - Set response Content-Type

[Dean M. B. <mik...@gm...>]

On Tue, Jan 11, 2011 at 5:40 AM, David Hite <dav...@gm...> wrote:
> Hey Dean,
> Thanks for the quick reply.

You're welcome. :)

> I can't find the example you are talking about... i'm using 0.8 version.
>

Ah, yes, the example is only in 0.9-devel at the moment and will be
coming out in 0.9 (beta coming within the week).

> I'm also getting some compile errors when I try to push the content-type
> header on the response.headers
>
> Here's my code:
>
>     Server::response_header content_type = {"Content-Type",
> "application/vnd.google-earth.kml+xml"};
>
>     // set message in response
>     response = Server::response::stock_reply(Server::response::ok,
> kml_string);
>
>     // set MIME type for response
>     response.headers.push_back( content_type );
>
> And here's my error:
>
> error: no matching function for call to
> 'std::vector<boost::network::http::request_header<boost::network::http::tags::http_server>,
> std::allocator<boost::network::http::request_header<boost::network::http::tags::http_server>
>>
>>::push_back(boost::network::http::response_header<boost::network::http::tags::http_server>&)'
> /usr/include/c++/4.4/bits/stl_vector.h:733: note: candidates are: void
> std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp =
> boost::network::http::request_header<boost::network::http::tags::http_server>,
> _Alloc =
> std::allocator<boost::network::http::request_header<boost::network::http::tags::http_server>
>>]
>
> These error messages are impossible to decipher... any ideas?

Ah, it actually just says that you can't push a `response_header<...>`
into a vector of `request_header<...>`. I remember this being
something I fixed in the 0.9-devel branch and which is an oversight on
my part in 0.8.

> The only candidate function it's listing is using
> boost::network::http::request_header. I tried that too and no dice.
>

Code like this should work:

    boost::network::http::request_header<boost::network::tags::http_server>
      content_type = {"Content-Type", "application/vnd.google-earth.kml+xml"};
    response.push_back(content_type);

If that still doesn't work, let me know because that would be a serious problem.

Have a good one and I hope this helps.

(Also, please try not to top-post :D)

-- 
Dean Michael Berris
about.me/deanberris

Re: [cpp-netlib-devel] HTTP Server - Set response Content-Type

[David H. <dav...@gm...>]

On Mon, Jan 10, 2011 at 8:35 PM, Dean Michael Berris <mik...@gm...
> wrote:

> On Tue, Jan 11, 2011 at 5:40 AM, David Hite <dav...@gm...> wrote:
> > Hey Dean,
> > Thanks for the quick reply.
>
> You're welcome. :)
>
> > I can't find the example you are talking about... i'm using 0.8 version.
> >
>
> Ah, yes, the example is only in 0.9-devel at the moment and will be
> coming out in 0.9 (beta coming within the week).
>
> > I'm also getting some compile errors when I try to push the content-type
> > header on the response.headers
> >
> > Here's my code:
> >
> >     Server::response_header content_type = {"Content-Type",
> > "application/vnd.google-earth.kml+xml"};
> >
> >     // set message in response
> >     response = Server::response::stock_reply(Server::response::ok,
> > kml_string);
> >
> >     // set MIME type for response
> >     response.headers.push_back( content_type );
> >
> > And here's my error:
> >
> > error: no matching function for call to
> >
> 'std::vector<boost::network::http::request_header<boost::network::http::tags::http_server>,
> >
> std::allocator<boost::network::http::request_header<boost::network::http::tags::http_server>
> >>
>
> >>::push_back(boost::network::http::response_header<boost::network::http::tags::http_server>&)'
> > /usr/include/c++/4.4/bits/stl_vector.h:733: note: candidates are: void
> > std::vector<_Tp, _Alloc>::push_back(const _Tp&) [with _Tp =
> >
> boost::network::http::request_header<boost::network::http::tags::http_server>,
> > _Alloc =
> >
> std::allocator<boost::network::http::request_header<boost::network::http::tags::http_server>
> >>]
> >
> > These error messages are impossible to decipher... any ideas?
>
> Ah, it actually just says that you can't push a `response_header<...>`
> into a vector of `request_header<...>`. I remember this being
> something I fixed in the 0.9-devel branch and which is an oversight on
> my part in 0.8.
>
> > The only candidate function it's listing is using
> > boost::network::http::request_header. I tried that too and no dice.
> >
>
> Code like this should work:
>
>    boost::network::http::request_header<boost::network::tags::http_server>
>       content_type = {"Content-Type",
> "application/vnd.google-earth.kml+xml"};
>     response.push_back(content_type);
>
> If that still doesn't work, let me know because that would be a serious
> problem.
>
> Have a good one and I hope this helps.
>
> (Also, please try not to top-post :D)
>
> --
> Dean Michael Berris
> about.me/deanberris
>
>
> ------------------------------------------------------------------------------
> Gaining the trust of online customers is vital for the success of any
> company
> that requires sensitive data to be transmitted over the Web.   Learn how to
> best implement a security strategy that keeps consumers' information secure
> and instills the confidence they need to proceed with transactions.
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
> Cpp-netlib-devel mailing list
> Cpp...@li...
> https://lists.sourceforge.net/lists/listinfo/cpp-netlib-devel
>

Dean,
I got it to work!

Here's the code that works:

// These are my defs for namespace & server type
namespace http = boost::network::http;
typedef http::server<CgiServer> Server;


http::request_header<http::tags::http_server> content_type =
{"Content-Type", "application/vnd.google-earth.kml+xml"};

// set message in response
response = Server::response::stock_reply(Server::response::ok, kml_string);

response.headers.push_back( content_type );

Thanks for your help!
-Dave-

Re: [cpp-netlib-devel] HTTP Server - Set response Content-Type

[Dean M. B. <mik...@gm...>]

On Tue, Jan 11, 2011 at 1:05 PM, David Hite <dav...@gm...> wrote:
>
> Dean,
> I got it to work!

Cool!

> Here's the code that works:
> // These are my defs for namespace & server type
> namespace http = boost::network::http;
> typedef http::server<CgiServer> Server;
>
> http::request_header<http::tags::http_server> content_type =
> {"Content-Type", "application/vnd.google-earth.kml+xml"};
> // set message in response
> response = Server::response::stock_reply(Server::response::ok, kml_string);
> response.headers.push_back( content_type );

Ah, yes, the tags are in the http namespace. I really should fix that
with an example. :)

> Thanks for your help!

You're welcome! :)

-- 
Dean Michael Berris
about.me/deanberris