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@@ -40,6 +40,8 @@ FAQ
Yes. Both ways on FTP, download ways on HTTP.
+ Try the -c and -C options.
+
4. Is libcurl thread safe?
As version seven is slowly marching in as the libcurl version to use, we
@@ -124,13 +126,23 @@ FAQ
part of a URL, you should qoute the entire URL by using single (') or
double (") quotes round it.
+ An example that would invoke a remote CGI that uses &-letters could be:
+
+ # curl "http://www.altavista.com/cgi-bin/query?text=yes&q=curl"
+
10. How can I use {, }, [ or ] to specify multiple URLs?
Because those letters have a special meaning to the shell, and to be used
in a URL specified to curl you must quote them.
+ An example that downloads two URLs (sequentially) would do:
+
+ # curl '{curl,www}.haxx.se'
+
11. Where can I find a copy of LIBEAY32.DLL?
+ That is an OpenSSL binary built for Windows.
+
Curl uses OpenSSL to do the SSL stuff. The LIBEAY32.DLL is what curl needs
on a windows machine to do https://. Check out the curl web page to find
accurate and up-to-date pointers to recent OpenSSL DDLs and other binary
@@ -143,6 +155,9 @@ FAQ
respond and that means that headers and a "page" will be returned. That's
simply how HTTP works.
+ By using the --fail option you can tell curl explicitly to not get any data
+ if the HTTP return code doesn't say success.
+
13. Why do I get "HTTP/1.1 403 Forbidden" from a http server?
RFC2616 clearly explains this return code:
@@ -173,12 +188,12 @@ FAQ
16. How do I keep usernames and passwords secret in Curl command lines?
- I see this problem in two parts:
+ I see this problem as two parts:
The first part is to avoid having clear-text passwords in the command line
- so that they appear in 'ps' outputs and similar. That is easily avoided by
- using the "-K -" contruct that causes curl to read parameters from stdin to
- which you can pass the secret info.
+ so that they don't appear in 'ps' outputs and similar. That is easily
+ avoided by using the "-K" option that tells curl to read parameters from a
+ file or stdin to which you can pass the secret info.
To keep the passwords in your account secret from the rest of the world is
not a task that curl addresses. You could of course encrypt them somehow to
@@ -204,3 +219,8 @@ FAQ
19. Can I use curl to delete/rename a file through FTP?
Yes. You specify custom ftp commands with -Q/--quote.
+
+ One example would be to delete a file after you have downloaded it:
+
+ # curl -O ftp://download.com/coolfile -Q "-DELE coolfile"
+