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authorDaniel Stenberg <daniel@haxx.se>2001-01-04 12:44:34 +0000
committerDaniel Stenberg <daniel@haxx.se>2001-01-04 12:44:34 +0000
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-
-
- How To Use Libcurl In Your Program
-
-Interfaces
-
- libcurl currently offers two different interfaces to the URL transfer
- engine. They can be seen as one low-level and one high-level, in the sense
- that the low-level one will allow you to deal with a lot more details but on
- the other hand not offer as many fancy features (such as Location:
- following). The high-level interface is supposed to be a built-in
- implementation of the low-level interface. You will not be able to mix
- function calls from the different layers.
-
- As we currently ONLY support the high-level interface, the so called easy
- interface, I will not attempt to describe any low-level functions at this
- point.
-
-Function descriptions
-
- The interface is meant to be very simple for very simple
- implementations. Thus, we have minimized the number of entries.
-
-The Easy Interface
-
- When using the easy interface, you init your easy-session and get a handle,
- which you use as input to the following interface functions you use.
-
- You continue by setting all the options you want in the upcoming transfer,
- most important among them is the URL itself. You might want to set some
- callbacks as well that will be called from the library when data is available
- etc.
-
- When all is setup, you tell libcurl to perform the transfer. It will then do
- the entire operation and won't return until it is done or failed.
-
- After the transfer has been made, you cleanup the easy-session's handle and
- libcurl is entirely off the hook!
-
- curl_easy_init()
- curl_easy_setopt()
- curl_easy_perform()
- curl_easy_cleanup()
-
- While the above four functions are the main functions to use in the easy
- interface, there is a series of helpful functions to use. They are:
-
- curl_version() - displays the libcurl version
- curl_getdate() - converts a date string to time_t
- curl_getenv() - portable environment variable reader
- curl_formparse() - helps building a HTTP form POST
- curl_slist_append() - builds a linked list
- curl_slist_free_all() - frees a whole curl_slist
-
- Read the separate man pages for these functions for details!
-