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Posted to httpclient-users@hc.apache.org by Melvin Mah <me...@yahoo.com> on 2006/09/28 04:02:37 UTC
Entity Enclosing Requests
I am currently using HttpClients v3.0.1 and I just
tried writing a class that utilizes a POST method.
This class allows inserting of username and password
for a website (as parameters) such as SCOPUS, Emerald,
etc.. and then once it logs into the website's
database, the page will be redirected to a subpage in
which I can perform my search queries.
For that purpose, I've put in a line -
method.setFollowRedirects
but upon running the program,
I get the message that 'Entity Enclosing Requests'
cannot be redirected without user intervention.
I understand that this is in violation with RFC 2616
but somehow I need to redirect it to a subpage. Any
workarounds behind this obstacle is very much appreciated.
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Re: Entity Enclosing Requests
Posted by Roland Weber <ht...@dubioso.net>.
Hello Melvin,
> The question is can I just simply reuse the last half
> of PostMethod in LoginDemo (modified) and just adding
> new NameValuePair variables? Do I have to modify
> anything substantially?
That totally depends on the server application. You should
first try to make it as simple as possible. If that doesn't
work, the primer explains how to proceed:
http://wiki.apache.org/jakarta-httpclient/ForAbsoluteBeginners
cheers,
Roland
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Re: Entity Enclosing Requests
Posted by Melvin Mah <me...@yahoo.com>.
Hi Oleg,
I just referred back to LoginDemo - one of the samples
for HTTPClient - to test the Redirect and changed a
little using some parameters for the site Engineering
Village.
Now that the login status is successful, I want to
entering a key term and then EV will redirect to
another page and send me the results based on the
keyword I would enter.
Currently, the pointer link is at
/Servlet/Controller/CID?=quicksearch&database=1.
(after login)
The link shown after the search results are returned
would be at:
The question is can I just simply reuse the last half
of PostMethod in LoginDemo (modified) and just adding
new NameValuePair variables? Do I have to modify
anything substantially?
Thanks
--- Oleg Kalnichevski <ol...@apache.org> wrote:
> Melvin Mah wrote:
> > I am currently using HttpClients v3.0.1 and I just
> > tried writing a class that utilizes a POST method.
>
> >
> > This class allows inserting of username and
> password
> > for a website (as parameters) such as SCOPUS,
> Emerald,
> > etc.. and then once it logs into the website's
> > database, the page will be redirected to a subpage
> in
> > which I can perform my search queries.
> >
> > For that purpose, I've put in a line -
> >
> > method.setFollowRedirects
> >
> > but upon running the program,
> > I get the message that 'Entity Enclosing Requests'
> > cannot be redirected without user intervention.
> >
> > I understand that this is in violation with RFC
> 2616
> > but somehow I need to redirect it to a subpage.
> Any
> > workarounds behind this obstacle is very much
> appreciated.
> >
> Melvin,
>
> You have to handle POST redirects manually because
> this requires change
> of the method type from POST to GET, which
> HttpClient 3.x cannot do
> automatically.
>
> For details see the HttpClient Redirects Handling
> guide:
>
>
http://jakarta.apache.org/commons/httpclient/redirects.html
>
> Hope this helps
>
> Oleg
>
> > __________________________________________________
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> >
> >
>
>
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Re: Entity Enclosing Requests
Posted by Oleg Kalnichevski <ol...@apache.org>.
Melvin Mah wrote:
> I am currently using HttpClients v3.0.1 and I just
> tried writing a class that utilizes a POST method.
>
> This class allows inserting of username and password
> for a website (as parameters) such as SCOPUS, Emerald,
> etc.. and then once it logs into the website's
> database, the page will be redirected to a subpage in
> which I can perform my search queries.
>
> For that purpose, I've put in a line -
>
> method.setFollowRedirects
>
> but upon running the program,
> I get the message that 'Entity Enclosing Requests'
> cannot be redirected without user intervention.
>
> I understand that this is in violation with RFC 2616
> but somehow I need to redirect it to a subpage. Any
> workarounds behind this obstacle is very much appreciated.
>
Melvin,
You have to handle POST redirects manually because this requires change
of the method type from POST to GET, which HttpClient 3.x cannot do
automatically.
For details see the HttpClient Redirects Handling guide:
http://jakarta.apache.org/commons/httpclient/redirects.html
Hope this helps
Oleg
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
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