Handles non-CSV file types Chicago#126

  * Ignores HTML files (e.g., Socrata Pages)
  * Ignores on occassions there isn't any data
  * Will download (uncompressed) PDFs, Word, Excel, PowerPoint, plain text attachments.

DESCRIPTION

@@ -11,7 +11,7 @@ Description: Provides easier interaction with
     Users can upload data to Socrata portals directly
     from R.
 Version: 1.8.0-6
-Date: 2018-10-28
+Date: 2019-01-05
 Author: Hugh Devlin, Ph. D., Tom Schenk, Jr., and John Malc
 Maintainer: "Tom Schenk Jr." <developers@cityofchicago.org>
 Depends:

R/RSocrata.R

@@ -461,14 +461,14 @@ write.socrata <- function(dataframe, dataset_json_endpoint, update_mode, email,
 
 #' Exports CSVs from Socrata data portals
 #' 
-#' Input the URL of a data portal (e.g., "data.cityofchicago.org") and
-#' will download all CSV files (no other files supported) and saved in
-#' a single directory named after the root URL (e.g., "data.cityofchicago.org/").
-#' Downloaded files are compressed to GZip format and timestamped so the download
-#' time is cataloged. The site's data.json file is downloaded as a canonical index
-#' of data saved from the website. Users can cross-reference the data.json file
-#' by matching the "four-by-four" in data.json with the first 5 letters of GZipped
-#' files.
+#' Input the base URL of a data portal (e.g., "data.cityofchicago.org") and
+#' will download CSVs, PDFs, Word, Excel,  and PowerPoint files contained on
+#' the respective data portal into a single directory named after the root URL.
+#' Downloaded CSV files are compressed to GZip format and each file timestamped 
+#' so the download time is cataloged. The site's data.json file is downloaded 
+#' as a canonical index of data saved from the website. Users can cross-reference 
+#' the data.json file by matching the "four-by-four" in data.json with the first 
+#' 5 letters of downloaded files.
 #' @param url - the base URL of a domain (e.g., "data.cityofchicago.org")
 #' @param app_token - a string; SODA API token used to query the data 
 #' portal \url{http://dev.socrata.com/consumers/getting-started.html} 
@@ -478,7 +478,7 @@ write.socrata <- function(dataframe, dataset_json_endpoint, update_mode, email,
 #' @importFrom jsonlite write_json
 #' @importFrom utils write.csv
 #' @export
-export.socrata <- function(url, app_token = NULL) {
+export.socrata <- function(url, path = getwd(), app_token = NULL) {
   dir.create(basename(url), showWarnings = FALSE) # Create directory based on URL
 
   downloadTime <- Sys.time()     # Grab timestamp when data.json was downloaded
@@ -497,10 +497,11 @@ export.socrata <- function(url, app_token = NULL) {
 
     # Download data
     downloadUrl <- ls$distribution[[i]]$downloadURL[1] # Currently grabs CSV, which is the first element
-    if(is.null(downloadUrl)) {                         # Skips if not a data file (e.g., Socrata Pages)
+    mediaType <- ls$distribution[[i]]$mediaType
+    if(is.null(downloadUrl)) {                         # Skips if there is no data or file
       next
-    } else if(grepl(".csv", downloadUrl)) {           # Downloads if it's a CSV
-      d <- read.socrata(downloadUrl, app_token)
+    } else if(mediaType[1] == "text/csv") {            # Downloads if it's a CSV
+      d <- RSocrata::read.socrata(downloadUrl, app_token)
 
       # Construct the filename output
       default_format <- "csv"
@@ -512,8 +513,10 @@ export.socrata <- function(url, app_token = NULL) {
 
       # Write file
       write.csv(d, file = gzfile(filename))             # Writes g-zipped file
+    } else if(mediaType == "text/html") {               # Skips file if it's an HTML page
+      next
     } else {
-      response <- GET(downloadUrl)                      # Downloads non-CSVs
+      response <- httr::GET(downloadUrl)                # Downloads non-CSVs (e.g. PDF, Word, etc.)
 
       # Construct the filename output
       if(is.null(response$headers$`content-disposition`)) {