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我需要超過65個文件與RCurl上傳到我的主機的FTP服務器，但我收到後幾個文件已被上傳錯誤：如何在R中上傳多個文件而不會收到421太多的連接錯誤？
< 421 Too many connections (8) from this IP
* We got a 421 - timeout!
* Closing connection 291
從我在日誌中看到它說Connection #283 to host ftp.myserver.com left intact使直到15分鐘不活動後連接過期，才需要進一步授權< 220 You will be disconnected after 15 minutes of inactivity.。
至少這是我的理解，因爲，出於某種原因，後立即重新發送用戶名和密碼的第二個文件：
> USER [email protected]
< 331 User [email protected] OK. Password required
> PASS mypassword
< 230 OK. Current restricted directory is/
我知道有倍數的授權請求（每個文件一個），這樣我淹沒服務器。
是否有可能首先打開到FTP服務器的連接，然後上傳所有文件？像在FileZilla中？
請找我使用R代碼：
for(file in list.files(localPath)) {
ftpUpload(paste0(localPath,file), userpwd = userpwd, to=paste0("ftp://", ftpPath, file), verbose=TRUE)
}
另一個SO成員在這裏有同樣的問題，但它看起來我已經使用了類似於提供給他的迴應的東西，忽略了最低的工作。 Using R to upload many files
謝謝
編輯（添加日誌）：
> for(file in list.files(localPath)) {
+
+ print(paste0("ftp://", ftpPath, file))
+ ftpUpload(paste0(localPath,file), userpwd = userpwd, to=paste0("ftp://", ftpPath, file), verbose=TRUE)
+
+ }
[1] "ftp://ftp.mywebsite.com/data/csv/data_private_allocation-1.csv"
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#310)
< 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
< 220-You are user number 2 of 1000 allowed.
< 220-Local time is now 08:50. Server port: 21.
< 220-This is a private system - No anonymous login
< 220-IPv6 connections are also welcome on this server.
< 220 You will be disconnected after 15 minutes of inactivity.
> USER [email protected]
< 331 User [email protected] OK. Password required
> PASS mypassword
< 230 OK. Current restricted directory is/
> PWD
< 257 "/" is your current location
* Entry path is '/'
> CWD portfolios
* ftp_perform ends with SECONDARY: 0
< 250 OK. Current directory is /portfolios
> CWD csv
< 250 OK. Current directory is /data/csv
> EPSV
* Connect data stream passively
< 229 Extended Passive mode OK (|||44516|)
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connecting to 11.22.33.44 (11.22.33.44) port 44516
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#310)
> TYPE I
< 200 TYPE is now 8-bit binary
> STOR data_private_allocation-1.csv
< 150 Accepted data connection
* Remembering we are in dir "data/csv/"
< 226-File successfully transferred
< 226 0.180 seconds (measured here), 1.15 Kbytes per second
* Connection #310 to host ftp.mywebsite.com left intact
[1] "ftp://ftp.mywebsite.com/data/csv/data_private_allocation-2.csv"
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#311)
< 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
< 220-You are user number 3 of 1000 allowed.
< 220-Local time is now 08:50. Server port: 21.
< 220-This is a private system - No anonymous login
< 220-IPv6 connections are also welcome on this server.
< 220 You will be disconnected after 15 minutes of inactivity.
> USER [email protected]
< 331 User [email protected] OK. Password required
> PASS mypassword
< 230 OK. Current restricted directory is/
> PWD
< 257 "/" is your current location
* Entry path is '/'
> CWD portfolios
* ftp_perform ends with SECONDARY: 0
< 250 OK. Current directory is /portfolios
> CWD csv
< 250 OK. Current directory is /data/csv
> EPSV
* Connect data stream passively
< 229 Extended Passive mode OK (|||45077|)
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connecting to 11.22.33.44 (11.22.33.44) port 45077
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#311)
> TYPE I
< 200 TYPE is now 8-bit binary
> STOR data_private_allocation-2.csv
< 150 Accepted data connection
* Remembering we are in dir "data/csv/"
< 226-File successfully transferred
< 226 0.207 seconds (measured here), 1.00 Kbytes per second
* Connection #311 to host ftp.mywebsite.com left intact
[1] "ftp://ftp.mywebsite.com/data/csv/data_private_allocation-3.csv"
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#312)
< 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
< 220-You are user number 4 of 1000 allowed.
< 220-Local time is now 08:50. Server port: 21.
< 220-This is a private system - No anonymous login
< 220-IPv6 connections are also welcome on this server.
< 220 You will be disconnected after 15 minutes of inactivity.
> USER [email protected]
< 331 User [email protected] OK. Password required
> PASS mypassword
< 230 OK. Current restricted directory is/
> PWD
< 257 "/" is your current location
* Entry path is '/'
> CWD portfolios
* ftp_perform ends with SECONDARY: 0
< 250 OK. Current directory is /portfolios
> CWD csv
< 250 OK. Current directory is /data/csv
> EPSV
* Connect data stream passively
< 229 Extended Passive mode OK (|||40390|)
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connecting to 11.22.33.44 (11.22.33.44) port 40390
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#312)
> TYPE I
< 200 TYPE is now 8-bit binary
> STOR data_private_allocation-3.csv
< 150 Accepted data connection
* Remembering we are in dir "data/csv/"
< 226-File successfully transferred
< 226 0.189 seconds (measured here), 1.12 Kbytes per second
* Connection #312 to host ftp.mywebsite.com left intact
[1] "ftp://ftp.mywebsite.com/data/csv/data_private_allocation-4.csv"
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#313)
< 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
< 220-You are user number 5 of 1000 allowed.
< 220-Local time is now 08:50. Server port: 21.
< 220-This is a private system - No anonymous login
< 220-IPv6 connections are also welcome on this server.
< 220 You will be disconnected after 15 minutes of inactivity.
> USER [email protected]
< 331 User [email protected] OK. Password required
> PASS mypassword
< 230 OK. Current restricted directory is/
> PWD
< 257 "/" is your current location
* Entry path is '/'
> CWD portfolios
* ftp_perform ends with SECONDARY: 0
< 250 OK. Current directory is /portfolios
> CWD csv
< 250 OK. Current directory is /data/csv
> EPSV
* Connect data stream passively
< 229 Extended Passive mode OK (|||46329|)
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connecting to 11.22.33.44 (11.22.33.44) port 46329
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#313)
> TYPE I
< 200 TYPE is now 8-bit binary
> STOR data_private_allocation-4.csv
< 150 Accepted data connection
* Remembering we are in dir "data/csv/"
< 226-File successfully transferred
< 226 0.187 seconds (measured here), 1.11 Kbytes per second
* Connection #313 to host ftp.mywebsite.com left intact
[1] "ftp://ftp.mywebsite.com/data/csv/data_private_allocation_protected-1.csv"
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#314)
< 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
< 220-You are user number 6 of 1000 allowed.
< 220-Local time is now 08:50. Server port: 21.
< 220-This is a private system - No anonymous login
< 220-IPv6 connections are also welcome on this server.
< 220 You will be disconnected after 15 minutes of inactivity.
> USER [email protected]
< 331 User [email protected] OK. Password required
> PASS mypassword
< 230 OK. Current restricted directory is/
> PWD
< 257 "/" is your current location
* Entry path is '/'
> CWD portfolios
* ftp_perform ends with SECONDARY: 0
< 250 OK. Current directory is /portfolios
> CWD csv
< 250 OK. Current directory is /data/csv
> EPSV
* Connect data stream passively
< 229 Extended Passive mode OK (|||46556|)
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connecting to 11.22.33.44 (11.22.33.44) port 46556
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#314)
> TYPE I
< 200 TYPE is now 8-bit binary
> STOR data_private_allocation_protected-1.csv
< 150 Accepted data connection
* Remembering we are in dir "data/csv/"
< 226-File successfully transferred
< 226 0.186 seconds (measured here), 2.75 Kbytes per second
* Connection #314 to host ftp.mywebsite.com left intact
[1] "ftp://ftp.mywebsite.com/data/csv/data_private_allocation_protected-2.csv"
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#315)
< 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
< 220-You are user number 7 of 1000 allowed.
< 220-Local time is now 08:50. Server port: 21.
< 220-This is a private system - No anonymous login
< 220-IPv6 connections are also welcome on this server.
< 220 You will be disconnected after 15 minutes of inactivity.
> USER [email protected]
< 331 User [email protected] OK. Password required
> PASS mypassword
< 230 OK. Current restricted directory is/
> PWD
< 257 "/" is your current location
* Entry path is '/'
> CWD portfolios
* ftp_perform ends with SECONDARY: 0
< 250 OK. Current directory is /portfolios
> CWD csv
< 250 OK. Current directory is /data/csv
> EPSV
* Connect data stream passively
< 229 Extended Passive mode OK (|||43730|)
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connecting to 11.22.33.44 (11.22.33.44) port 43730
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#315)
> TYPE I
< 200 TYPE is now 8-bit binary
> STOR data_private_allocation_protected-2.csv
< 150 Accepted data connection
* Remembering we are in dir "data/csv/"
< 226-File successfully transferred
< 226 0.190 seconds (measured here), 2.69 Kbytes per second
* Connection #315 to host ftp.mywebsite.com left intact
[1] "ftp://ftp.mywebsite.com/data/csv/data_private_allocation_protected-3.csv"
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#316)
< 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
< 220-You are user number 8 of 1000 allowed.
< 220-Local time is now 08:50. Server port: 21.
< 220-This is a private system - No anonymous login
< 220-IPv6 connections are also welcome on this server.
< 220 You will be disconnected after 15 minutes of inactivity.
> USER [email protected]
< 331 User [email protected] OK. Password required
> PASS mypassword
< 230 OK. Current restricted directory is/
> PWD
< 257 "/" is your current location
* Entry path is '/'
> CWD portfolios
* ftp_perform ends with SECONDARY: 0
< 250 OK. Current directory is /portfolios
> CWD csv
< 250 OK. Current directory is /data/csv
> EPSV
* Connect data stream passively
< 229 Extended Passive mode OK (|||43399|)
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connecting to 11.22.33.44 (11.22.33.44) port 43399
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#316)
> TYPE I
< 200 TYPE is now 8-bit binary
> STOR data_private_allocation_protected-3.csv
< 150 Accepted data connection
* Remembering we are in dir "data/csv/"
< 226-File successfully transferred
< 226 0.196 seconds (measured here), 2.61 Kbytes per second
* Connection #316 to host ftp.mywebsite.com left intact
[1] "ftp://ftp.mywebsite.com/data/csv/data_private_allocation_protected-4.csv"
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#317)
< 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
< 220-You are user number 9 of 1000 allowed.
< 220-Local time is now 08:50. Server port: 21.
< 220-This is a private system - No anonymous login
< 220-IPv6 connections are also welcome on this server.
< 220 You will be disconnected after 15 minutes of inactivity.
> USER [email protected]
< 331 User [email protected] OK. Password required
> PASS mypassword
< 230 OK. Current restricted directory is/
> PWD
< 257 "/" is your current location
* Entry path is '/'
> CWD portfolios
* ftp_perform ends with SECONDARY: 0
< 250 OK. Current directory is /portfolios
> CWD csv
< 250 OK. Current directory is /data/csv
> EPSV
* Connect data stream passively
< 229 Extended Passive mode OK (|||48536|)
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connecting to 11.22.33.44 (11.22.33.44) port 48536
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#317)
> TYPE I
< 200 TYPE is now 8-bit binary
> STOR data_private_allocation_protected-4.csv
< 150 Accepted data connection
* Remembering we are in dir "data/csv/"
[1] "ftp://ftp.mywebsite.com/data/csv/data_coins_average-1.csv"
< 226-File successfully transferred
< 226 0.184 seconds (measured here), 2.77 Kbytes per second
* Connection #317 to host ftp.mywebsite.com left intact
* Hostname was NOT found in DNS cache
* Trying 11.22.33.44...
* Connected to ftp.mywebsite.com (11.22.33.44) port 21 (#318)
< 421 Too many connections (8) from this IP
* We got a 421 - timeout!
* Closing connection 318
Error in function (type, msg, asError = TRUE) :
Uploading to a URL without a file name!
您是否嘗試關閉任何打開的連接（'？closeAllConnections'）？ –
嗨，我剛剛用'closeAllConnections（）'關閉了'gzcon'，但仍然有'421太多連接錯誤'。 – Florent