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September 8, 2022 09:51
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Demo code showing how to collect analyze the subreddits a particular user has participated in, using R sintead of python (praw). I don't believe the code is exiting when it should, but this should at least serve as a jumping off point from the person who asked for help: http://www.reddit.com/r/rstats/comments/1tq4au/accessing_the_reddit_api_thro…
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#install.packages("rjson","RCurl") | |
library(RCurl) | |
library(rjson) | |
get_User_subs_page = function(user, after=NULL, cache=c()){ | |
baseurl = "http://www.reddit.com/user/" | |
params = "limit=100" | |
if(!is.null(after)){ | |
params = paste(params, "&after=",after, sep="") | |
} | |
userCommentsUrl = paste(baseurl, user, "/.json?",params, sep="") | |
jsonResponse = getURLContent(userCommentsUrl, curl=getCurlHandle()) | |
StructuredResponse = fromJSON(jsonResponse, unexpected.escape = "keep") | |
# Extract subreddits | |
n=length(StructuredResponse$data$children) # Count retrieved comment objects | |
substemp = rep(NA) | |
done = F | |
for(i in 1:n){ | |
obj = StructuredResponse$data$children[[i]]$data | |
if(any(cache==obj$id)){ | |
print("done") | |
done=T | |
return(list(substemp, NULL, cache, done)) | |
} | |
substemp[i] = obj$subreddit | |
cache=c(cache, obj$id) | |
} | |
nextID = StructuredResponse$data$after # for paging | |
list(substemp, nextID, cache, done) | |
} | |
USER="ENTER USERNAME HERE" | |
subreddits = c() | |
afterID=NULL | |
ids_cache = c() | |
done=F | |
iter=0 | |
while(!done){ | |
iter=iter+1 | |
print(iter) | |
subs_page = get_User_subs_page(user=USER, after=afterID, cache=ids_cache) | |
subreddits = c(subreddits, subs_page[[1]]) | |
afterID=subs_page[[2]] | |
ids_cache=subs_page[[3]] | |
done = subs_page[[4]] | |
Sys.sleep(2) # sleep 2 seconds to respect reddit API so we don't get blocked | |
} | |
aggregate(subreddits, by=list(subreddits), length) |
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