fix: parallel download (#15)

* fix: use http1

* chore: bump version

* refactor: add support for redirect

* fix: add accidentally deleted line

* fix: properly parse quotes in content-disposition

* test: change R params

* fix: bad refactor

* test: add multiplex

* test: revert multiplex, increase host conn

* test: host_con to 100

* revert max connections to 20

* try multiplex again

* host_con = 20

* host_con=50

* tweak buffer size

* try curl default pool options

* add print for testing

* 256k buffer

* remove buffer size

* cleanup

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: redivis
 Type: Package
 Title: R interface for Redivis
-Version: 0.6.8
+Version: 0.6.9
 Author: Redivis Inc.
 Maintainer: Redivis <[email protected]>
 Description: Supports working with Redivis datasets and tables through R. 

R/File.R

@@ -36,7 +36,7 @@ File <- setRefClass(
       stream_callback <- NULL
       if (is_dir){
         get_download_path_callback <- function(headers){
-          name <- headers$'x-redivis-filename'
+          name <- sub(".*filename=", "", headers$'content-disposition')
           file_name <- file.path(path, name)
           if (!overwrite && base::file.exists(file_name)){
             stop(str_interp("File already exists at '${file_name}'. Set parameter overwrite=TRUE to overwrite existing files."))
@@ -54,7 +54,7 @@ File <- setRefClass(
         on.exit(close(con))
       }
 
-      res <- make_request(method="GET", path=str_interp("/rawFiles/${id}"), parse_response=FALSE, get_download_path_callback=get_download_path_callback, stream_callback=stream_callback)
+      res <- make_request(method="GET", path=str_interp("/rawFiles/${id}"), query=list(allowRedirect="true"), parse_response=FALSE, get_download_path_callback=get_download_path_callback, stream_callback=stream_callback)
       if (is_dir){
         return(res)
       } else {

R/Table.R

@@ -295,7 +295,7 @@ Table <- setRefClass("Table",
         if (progress){
           progressr::with_progress(perform_table_parallel_file_download(df[[file_id_variable]], path, overwrite))
         } else {
-          perform_parallel_file_download(df[[file_id_variable]], path, overwrite)
+          perform_table_parallel_file_download(df[[file_id_variable]], path, overwrite)
         }
       }
    )
@@ -304,16 +304,18 @@ Table <- setRefClass("Table",
 #' @importFrom future plan multicore multisession sequential
 #' @importFrom parallelly supportsMulticore
 #' @importFrom progressr progressor
+#' @importFrom purrr map
 perform_table_parallel_file_download <- function(vec, path, overwrite){
   pb <- progressr::progressor(steps = length(vec))
   download_paths <- list()
   get_download_path_from_headers <- function(headers){
-    file_path <- base::file.path(path, headers$'x-redivis-filename')
+    name <- gsub('^"|"$', '', sub(".*filename=", "", headers$'content-disposition'))
+    file_path <- base::file.path(path, name)
     download_paths <<- append(download_paths, file_path)
     return(file_path)
   }
   perform_parallel_download(
-    purrr::map(vec, function(id){str_interp("/rawFiles/${id}")}),
+    purrr::map(vec, function(id){str_interp("/rawFiles/${id}?allowRedirect=true")}),
     overwrite=overwrite,
     get_download_path_from_headers=get_download_path_from_headers,
     on_finish=function(){pb(1)}

R/api_request.R

@@ -119,6 +119,7 @@ make_request <- function(method='GET', query=NULL, payload = NULL, parse_respons
   }
 }
 
+#' @importFrom purrr map set_names
 parse_curl_headers <- function(res_data){
   vec <- curl::parse_headers(res_data$headers)
 
@@ -133,14 +134,14 @@ parse_curl_headers <- function(res_data){
 
 #' @import curl
 perform_parallel_download <- function(paths, overwrite, get_download_path_from_headers, on_finish, stop_on_error=TRUE){
-  pool <- curl::new_pool(total_con = 100, host_con = 20, multiplex = TRUE)
+  pool <- curl::new_pool()
   handles = list()
   for (path in paths){
     h <- curl::new_handle()
     url <- generate_api_url(path)
     auth = get_authorization_header()
     curl::handle_setheaders(h, "Authorization"=auth[[1]])
-    curl::handle_setopt(h, "url"=url, buffersize=1048576) # 1MB buffer
+    curl::handle_setopt(h, "url"=url)
 
     fail_fn <- function(e){
       print(e)