Indus, As Daryl mentioned, InvokeHTTP will allow you to use the Expression Language to do an HTTP GET. It works a bit differently, though, because GetHTTP is a "Source Processor" whereas InvokeHTTP needs to be fed a FlowFile to do anything. So you can use GenerateFlowFile as a source and have it generate a 0 byte FlowFile (set the File Size property to "0 B"). Then just connect GenerateFlowFile to InvokeHTTP.
Having said that, it is a bit awkward to have to use a GenerateFlowFile to trigger InvokeHTTP to run, so I went ahead and created a ticket [1] to allow GetHTTP to evaluate the Expression Language for the URL property. In the meantime, though, GenerateFlowFile -> InvokeHTTP should provide you with the capability you're looking for. Thanks -Mark [1] https://issues.apache.org/jira/browse/NIFI-993 <https://issues.apache.org/jira/browse/NIFI-993> > On Sep 23, 2015, at 9:14 PM, Daryl Teo <daryl....@listcorp.com> wrote: > > Indus - use InvokeHTTP > > Daryl > > On Thu, Sep 24, 2015 at 11:07 AM, indus well <indusw...@gmail.com > <mailto:indusw...@gmail.com>> wrote: > Hello NiFi Experts: > > The GetHTTP processor works fine with static filename when getting files from > a website. However, I have a use case where I need to download a file daily > and the filename is the date of today, ie: 09222015.zip. Since the URL > property of the GetHTTP does not support expression language, I cannot do > something like http://example.com/${now():format('MMddyyyy')}.zip > <http://example.com/$%7Bnow():format('MMddyyyy')%7D.zip>. Is there a way I > can specify the filename dynamically? Or using other processor to make this > work. Please advise. > > Thanks, > > Indus > > > > -- > Daryl Teo > > Tech Lead > > > <logo2.jpg> > > 122 Cremorne Street > Richmond VIC 3121 > Australia > > T +61 (3)8669 1821 > M +61 (0)432 413 752 > > www.listcorp.com <http://www.listcorp.com/> > <stroke.png> > > This email (including any attachments) is confidential and may be privileged. > It may be read, copied and used only by the intended recipient. If you have > received it in error, please contact the sender immediately by return email. > Please then delete both emails and do not disclose their contents to any > person. We believe, but do not warrant, that this email and any attachments > are virus free. You should take full responsibility for virus checking. > Listcorp. reserves the right to monitor all email communications. If the > content of this email is personal or unconnected with our business, we accept > no liability or responsibility for it.
