FAQ: more minor updates and spelling fixes

  3.9 How do I use curl in my favorite programming language?

  3.10 What about SOAP, WebDAV, XML-RPC or similar protocols over HTTP?

  3.11 How do I POST with a different Content-Type?

  3.12 Why do FTP specific features over HTTP proxy fail?

  3.13 Why does my single/double quotes fail?

  3.12 Why do FTP-specific features over HTTP proxy fail?

  3.13 Why do my single/double quotes fail?

  3.14 Does curl support Javascript or PAC (automated proxy config)?

  3.15 Can I do recursive fetches with curl?

  3.16 What certificates do I need when I use SSL?

  4.8 I found a bug!

  4.9 Curl can't authenticate to the server that requires NTLM?

  4.10 My HTTP request using HEAD, PUT or DELETE doesn't work!

  4.11 Why does my HTTP range requests return the full document?

  4.11 Why do my HTTP range requests return the full document?

  4.12 Why do I get "certificate verify failed" ?

  4.13 Why is curl -R on Windows one hour off?

  4.14 Redirects work in browser but not with curl!

  3.9 How do I use curl in my favorite programming language?

  There exist many language interfaces/bindings for curl that integrates it

  better with various languages. If you are fluid in a script language, you

  may very well opt to use such an interface instead of using the command line

  tool.

  Many programming languages have interfaces/bindings that allow you to use

  curl without having to use the command line tool. If you are fluent in such

  a language, you may prefer to use one of these interfaces instead.

  Find out more about which languages that support curl directly, and how to

  install and use them, in the libcurl section of the curl web site:

        curl -d "datatopost" -H "Content-Type: text/xml" [URL]

  3.12 Why do FTP specific features over HTTP proxy fail?

  3.12 Why do FTP-specific features over HTTP proxy fail?

  Because when you use a HTTP proxy, the protocol spoken on the network will

  be HTTP, even if you specify a FTP URL. This effectively means that you

  normally can't use FTP specific features such as FTP upload and FTP quote

  normally can't use FTP-specific features such as FTP upload and FTP quote

  etc.

  There is one exception to this rule, and that is if you can "tunnel through"

  and is generally not available as proxy admins usually disable tunneling to

  ports other than 443 (which is used for HTTPS access through proxies).

  3.13 Why does my single/double quotes fail?

  3.13 Why do my single/double quotes fail?

  To specify a command line option that includes spaces, you might need to

  put the entire option within quotes. Like in:

       <H1>Moved Permanently</H1> The document has moved <A

       HREF="http://same_url_now_with_a_trailing_slash/">here</A>.

    it might be because you request a directory URL but without the trailing

    it might be because you requested a directory URL but without the trailing

    slash. Try the same operation again _with_ the trailing URL, or use the

    -L/--location option to follow the redirection.

  anyone would call security.

  Also note that regular HTTP (using Basic authentication) and FTP passwords

  are sent in clear across the network. All it takes for anyone to fetch them

  is to listen on the network.  Eavesdropping is very easy. Use more secure

  are sent as cleartext across the network. All it takes for anyone to fetch

  them is to listen on the network. Eavesdropping is very easy. Use more secure

  authentication methods (like Digest, Negotiate or even NTLM) or consider the

  SSL-based alternatives HTTPS and FTPS.

  software you're trying to interact with. This is not anything curl can do

  anything about.

  4.11 Why does my HTTP range requests return the full document?

  4.11 Why do my HTTP range requests return the full document?

  Because the range may not be supported by the server, or the server may

  choose to ignore it and return the full document anyway.

  redirects the browser to another given URL.

  There is no way to make curl follow these redirects. You must either

  manually figure out what the page is set to do, or you write a script that

  parses the results and fetches the new URL.

  manually figure out what the page is set to do, or write a script that parses

  the results and fetches the new URL.

  4.15 FTPS doesn't work