Created
November 4, 2012 22:49
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Collect Twitter and Insert into MongoDB
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## load the packages | |
require(XML) | |
require(RCurl) | |
require(rjson) | |
require(plyr) | |
## will create a request to the twitter search API - returns JSON | |
## https://dev.twitter.com/docs/api/1/get/search | |
## max combo can be 1500 tweets (100*15 pages) | |
## API limit = 150 requests / hour for requests that are not authenticated | |
TAG <- "#nfl" | |
HASHTAG <- URLencode(TAG) | |
BASE_URL <- "http://search.twitter.com/search.json" | |
RESULTS <- 10 #max results that can be returned | |
LANG <- "en" | |
TYPE <- "recent" | |
PAGES <- 1 | |
## should make this a function, but use a for loop for basic example | |
for (page in 1:PAGES) { | |
#page=1 | |
URL <- paste(BASE_URL, | |
"?q=", HASHTAG, | |
"&rpp=", RESULTS, | |
"&lang=", LANG, | |
"&result_type=", TYPE, | |
"&page=", page, | |
sep="") | |
out <- try(getURL(URL)) | |
twitter_data <- fromJSON(out) | |
twitter_data <- twitter_data$results | |
} | |
## load the r mongo libary -- Assumes that Mongo is running in the terminal | |
# ## help(mongo) | |
library(rmongodb) | |
## great help resource for rmongodb | |
## http://goo.gl/B6tYz | |
## follow the basics -- db is the datbase, ns = the collection of documents | |
db <- "twitter" | |
ns <- "brock_test" | |
dbns <- paste(db, ns, sep=".") | |
# mongo <- mongo.create(db=db) | |
mongo <- mongo.create() | |
mongo.is.connected(mongo) | |
## @ interactive shell for mongo, type "dbs" to show "twitter" was created | |
## create an entry from the first response in the list from twitter search | |
## needs to be a bson doc -- need to check that list converts ok | |
tmp <- twitter_data[[1]] | |
(tmp.bson <- mongo.bson.from.list(tmp)) | |
## Make sure we start with an empty collection | |
## ensure there is nothing there - T = was dropped, F may mean didnt exist | |
mongo.drop(mongo, dbns) | |
mongo.count(mongo, dbns) | |
## insert the record -- only 1 twitter response -- T = successful!! | |
mongo.insert(mongo, dbns, tmp.bson) | |
## did the record stay? -- should show 1, not 0 from above | |
mongo.count(mongo, dbns) | |
## query the record | |
## disconnect | |
mongo.disconnect(mongo) | |
## note the comments below -- I couldnt get RMongo to play nicely | |
## but appears to have a compact syntax. | |
## NB: rmongodb was produced by 10gen, the same as MongoDB | |
## | |
## another Mongo package -- need to install from github | |
## mongodb needs to be running | |
# library(devtools) | |
# install_github("RMongo", "tc") | |
# library(RMongo) | |
# mongo <- mongoDbConnect("test", "localhost", 27017) | |
# str(mongo) | |
# | |
# ## connect to a database, even if not connected | |
# mongo <- mongoDbConnect("twitter", "localhost", 27017) | |
# dbShowCollections(mongo) |
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