R help - Jun 2016 - httr package syntax (PUT)

Greetings fellow R users.

I'm struggling with the syntax of submitting a PUT request

I'm trying to insert a few PUT requests into some legacy R code that I have
that performs daily ETL on a small database. These requests will add users
to an email mailing list in MailChimp.


I have been able to get my GET requests formatted into syntax that R
(specifically the httr package) accepts:

GET("
https://us10.api.mailchimp.com/3.0/lists/list_id_XXXXX/members/MEMBER_HASH_#######",
query = list(apikey = 'XXXXXXXXXXXXXX'))


However when I try to do something similar for PUT requests this simple
syntax isn't working - you can't just pass the API KEY and/or requested
parameters directly through the URL. I get a 401 error if I use the same
syntax I used for GET.


I believe that I need to use the CONFIG option to pass the API key (either
using AUTHENTICATE or ADD_HEADERS) and the requested parameters in the BODY
to get the PUT request to work but I can't get the syntax to work - this
gives a 400 error:


auth <- authenticate("anystring", "XXXXXXXXXXXXXX", type
= "basic")

parms <- '[{"email_address" : "some_user at
domain.com", "status_if_new" :
"subscribed"}]'

PUT("
https://us10.api.mailchimp.com/3.0/lists/list_id_XXXXX/members/MEMBER_HASH_#######
",config=auth,body=parms,encode="json")


If anyone can point me to a more flushed out example that would be
amazing...but even just some tips on how to get more info on my error
message to help me troubleshoot my syntax would also be a big help.  I've
also been trying to get httpput (from the RCurl package) but also
struggling with the syntax there.


Thanks!


Jared

	[[alternative HTML version deleted]]

On Wed, Jun 1, 2016 at 7:16 PM, Jared Rodecker <jared.rodecker at
gmail.com> wrote:
> Greetings fellow R users.
>
> I'm struggling with the syntax of submitting a PUT request
>
> I'm trying to insert a few PUT requests into some legacy R code that I
have
> that performs daily ETL on a small database. These requests will add users
> to an email mailing list in MailChimp.
>
>
> I have been able to get my GET requests formatted into syntax that R
> (specifically the httr package) accepts:
>
> GET("
>
https://us10.api.mailchimp.com/3.0/lists/list_id_XXXXX/members/MEMBER_HASH_#######",
> query = list(apikey = 'XXXXXXXXXXXXXX'))
>
>
> However when I try to do something similar for PUT requests this simple
> syntax isn't working - you can't just pass the API KEY and/or
requested
> parameters directly through the URL. I get a 401 error if I use the same
> syntax I used for GET.
>
>
> I believe that I need to use the CONFIG option to pass the API key (either
> using AUTHENTICATE or ADD_HEADERS) and the requested parameters in the BODY
> to get the PUT request to work but I can't get the syntax to work -
this
> gives a 400 error:
>
>
> auth <- authenticate("anystring", "XXXXXXXXXXXXXX",
type = "basic")
>
> parms <- '[{"email_address" : "some_user at
domain.com", "status_if_new" :
> "subscribed"}]'
>
> PUT("
>
https://us10.api.mailchimp.com/3.0/lists/list_id_XXXXX/members/MEMBER_HASH_#######
> ",config=auth,body=parms,encode="json")
>
>
> If anyone can point me to a more flushed out example that would be
> amazing...but even just some tips on how to get more info on my error
> message to help me troubleshoot my syntax would also be a big help. 
I've
> also been trying to get httpput (from the RCurl package) but also
> struggling with the syntax there.
If you use verbose() you should be able to see what the problem is -
httr does the json encoding for you. You want:

params <- list(email_address = "some_user at domain.com",
status_if_new "subscribed")
PUT("https://us10.api.mailchimp.com/3.0/lists/list_id_XXXXX/members/MEMBER_HASH_#######",
   config = auth,
   body = params,
   encode = "json"
)

Hadley

-- 
http://hadley.nz