Rails - Nov 2008 - Sending a fire&forget http request in a model class.

I know this is bad mvc, but i have a model class that needs to send a
request off to a web service.  At the moment i''m building a request
string with url and params, and then doing a ''system'' call to
call curl
with the url.  This feels pretty dirty though.  Is there a nicer way to
just fire off an http request?

thanks
max
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On 19 Nov 2008, at 14:23, Max Williams wrote:
>
> I know this is bad mvc, but i have a model class that needs to send a
> request off to a web service.  At the moment i''m building a
request
> string with url and params, and then doing a ''system''
call to call
> curl
> with the url.  This feels pretty dirty though.  Is there a nicer way  
> to
> just fire off an http request?
>
net/http or similar ?

Fred
> thanks
> max
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >

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Hey,
   I would check this out:
http://www.ruby-doc.org/stdlib/libdoc/net/http/rdoc/index.html

Syntax looks something like:

http = Net::HTTP.new("www.google.com")
headers, body = http.get()


Hope that help
Jim Englert
http://www.jim-rants.com/coding-blog/

On Wed, Nov 19, 2008 at 9:36 AM, Frederick Cheung <
frederick.cheung-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
> On 19 Nov 2008, at 14:23, Max Williams wrote:
>
> >
> > I know this is bad mvc, but i have a model class that needs to send a
> > request off to a web service.  At the moment i''m building a
request
> > string with url and params, and then doing a
''system'' call to call
> > curl
> > with the url.  This feels pretty dirty though.  Is there a nicer way
> > to
> > just fire off an http request?
> >
> net/http or similar ?
>
> Fred
> > thanks
> > max
> > --
> > Posted via http://www.ruby-forum.com/.
> >
> > >
>
>
> >
>
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Thanks Fred

I''m not having any luck with it so far - this is the curl call i was 
making (with some changes to protect the innocent):

curl http://www.l-mail.biz/scripts/lia/lia.php \
-d l_cid=''1106'' \
-d l_key=''cg3608898b74a4c688787ab479b8bb9f'' \
-d 
l_content=''http://ir.chazanga.com/letter/show?encoded=MTE4MiZpdCdzIHdlZG5lc2RheQ==''
\
-d l_pb_url=''http://ir.chazanga.com/letter/confirm'' \
-d l_sname=''chazanga'' \
-d l_rname=''Max Williams'' \
-d l_rcname=''chazanga'' \
-d l_raddress1=''Suites 17 & 18'' \
-d l_raddress2=''9-12 Middle Street'' \
-d l_rcity=''Brighton'' \
-d l_rpostcode=''BN1 3TN'' \
-d l_rcountry=''3'' \
-d
l_email=''maxilliams-P31f+4y/2qxWk0Htik3J/w@public.gmane.org'' \
-d l_fb_emails=''1'' \
-d p_user_id=''2054''

So, when i tried to use Net::HTTP i was trying to deal with this massive 
params string.  I split it up like so:

domain = "www.l-mail.biz"

path = "/scripts/lia/lia.php"

params = 
"l_cid=1106&l_key=cg3608898b74a4c688787ab479b8bb9f&l_content=http://ir.chazanga.com/letter/show?encoded=MTE4MiZpdCdzIHdlZG5lc2RheQ==&l_pb_url=http://ir.chazanga.com/letter/confirm&l_sname=chazanga&l_rname=Max-Williams&l_rcname=chazanga&l_raddress1=Suites-17-18&l_raddress2=9-12-Middle-Street&l_rcity=Brighton&l_rpostcode=BN1-3TN&l_rcountry=3&l_email=maxwilliams-P31f+4y/2qxWk0Htik3J/w@public.gmane.org&l_fb_emails=1&p_user_id=2054"

The params string had spaces and & signs in it, so i just replaced them 
with safe characters temporarily while i played with Net::HTTP (with 
escaping them properly down for a later task).

I tried this:

http = Net::HTTP.new("#{domain}")
headers, body = http.get("#{path}?#{params}")

and got a 401 (Authorisation required) error back.  I think maybe my 
params weren''t going through properly.


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On 20 Nov 2008, at 09:38, Max Williams wrote:
>
> Thanks Fred
>
> I''m not having any luck with it so far - this is the curl call i
was
> making (with some changes to protect the innocent):
>
> curl http://www.l-mail.biz/scripts/lia/lia.php \
> -d l_cid=''1106'' \
> -d l_key=''cg3608898b74a4c688787ab479b8bb9f'' \
> -d
>
l_content=''http://ir.chazanga.com/letter/show?encoded=MTE4MiZpdCdzIHdlZG5lc2RheQ==''
> \
> -d l_pb_url=''http://ir.chazanga.com/letter/confirm'' \
> -d l_sname=''chazanga'' \
> -d l_rname=''Max Williams'' \
> -d l_rcname=''chazanga'' \
> -d l_raddress1=''Suites 17 & 18'' \
> -d l_raddress2=''9-12 Middle Street'' \
> -d l_rcity=''Brighton'' \
> -d l_rpostcode=''BN1 3TN'' \
> -d l_rcountry=''3'' \
> -d
l_email=''maxilliams-P31f+4y/2qxWk0Htik3J/w@public.gmane.org'' \
> -d l_fb_emails=''1'' \
> -d p_user_id=''2054''
>
> So, when i tried to use Net::HTTP i was trying to deal with this  
> massive
> params string.  I split it up like so:
>
> domain = "www.l-mail.biz"
>
> path = "/scripts/lia/lia.php"
>
> params >
"l_cid=1106&l_key=cg3608898b74a4c688787ab479b8bb9f&l_content=http://ir.chazanga.com/letter/show?encoded=MTE4MiZpdCdzIHdlZG5lc2RheQ==&l_pb_url=http://ir.chazanga.com/letter/confirm&l_sname=chazanga&l_rname=Max-Williams&l_rcname=chazanga&l_raddress1=Suites-17-18&l_raddress2=9-12-Middle-Street&l_rcity=Brighton&l_rpostcode=BN1-3TN&l_rcountry=3&l_email=maxwilliams-P31f+4y/2qxWk0Htik3J/w@public.gmane.org&l_fb_emails=1&p_user_id=2054
> "
>
> The params string had spaces and & signs in it, so i just replaced  
> them
> with safe characters temporarily while i played with Net::HTTP (with
> escaping them properly down for a later task).
>
> I tried this:
>
> http = Net::HTTP.new("#{domain}")
> headers, body = http.get("#{path}?#{params}")
Yuck. would be a lot easier to take a hash of params (ie 
{''l_cid'' =>
''1106'', ''l_key'' =>
''cg3608898b74a4c688787ab479b8bb9f'', ...} and then
call to_query on it.

Net::HTTP will also do that for you, with something like

response = Net::HTTP.start(host, port) do |http|
   get = Net::HTTP::Get.new path
   get.form_data = some_hash
   get.content_type = "application/x-www-form-urlencoded"
   http.request get
end


Fred


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Thanks Fred...

I totally agree, i actually build up all the params in a hash anyway.

Here it is in your recommended format.  One of the params has the 
complication of actually being a full url with params itself.  Curl 
seems to deal happily with this, i''m guessing it escapes everything 
nicely.  But trying this, i get the same 401 error back 
(#<Net::HTTPUnauthorized 401 Authorization Required readbody=true>).

host = "www.l-mail.biz"
port = 80
path = "/scripts/lia/lia.php"

param_hash = {
  :l_cid => ''1106'',
  :l_key => ''cg3608898b74a4c688787ab479b8bb9f'',
  :l_content => 
''http://ir.chazanga.com/letter/show?encoded=MTE4MiZpdCdzIHdlZG5lc2RheQ=='',
  :l_pb_url => ''http://ir.chazanga.com/letter/confirm'',
  :l_sname => ''chazanga'',
  :l_rname => ''Max Williams'',
  :l_rcname => ''chazanga'',
  :l_raddress1 => ''Suites 17 & 18'',
  :l_raddress2 => ''9-12 Middle Street'',
  :l_rcity => ''Brighton'',
  :l_rpostcode => ''BN1 3TN'',
  :l_rcountry => ''3'',
  :l_email =>
''maxwilliams-P31f+4y/2qxWk0Htik3J/w@public.gmane.org'',
  :l_fb_emails => ''1'',
  :p_user_id => ''2054''
}

response = Net::HTTP.start(host, port) do |http|
   get = Net::HTTP::Get.new path
   get.form_data = param_hash
   get.content_type = "application/x-www-form-urlencoded"
   http.request get
end


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