53 lines
2.0 KiB
Markdown
53 lines
2.0 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: libcurl
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Section: 3
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Source: libcurl
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See-also:
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- curl_easy_cleanup (3)
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- curl_easy_init (3)
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- curl_easy_setopt (3)
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- libcurl (3)
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- libcurl-errors (3)
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- libcurl-multi (3)
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---
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# NAME
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libcurl-easy - easy interface overview
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# DESCRIPTION
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When using libcurl's "easy" interface you init your session and get a handle
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(often referred to as an "easy handle"), which you use as input to the easy
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interface functions you use. Use curl_easy_init(3) to get the handle.
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You continue by setting all the options you want in the upcoming transfer, the
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most important among them is the URL itself (you cannot transfer anything
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without a specified URL as you may have figured out yourself). You might want
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to set some callbacks as well that are called from the library when data is
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available etc. curl_easy_setopt(3) is used for all this.
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CURLOPT_URL(3) is the only option you really must set, as otherwise
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there can be no transfer. Another commonly used option is
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CURLOPT_VERBOSE(3) that helps you see what libcurl is doing under the
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hood, which is useful when debugging for example. The
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curl_easy_setopt(3) man page has a full index of the almost 300
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available options.
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If you at any point would like to blank all previously set options for a
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single easy handle, you can call curl_easy_reset(3) and you can also
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make a clone of an easy handle (with all its set options) using
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curl_easy_duphandle(3).
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When all is setup, you tell libcurl to perform the transfer using
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curl_easy_perform(3). It performs the entire transfer operation and does
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not return until it is done (successfully or not).
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After the transfer has been made, you can set new options and make another
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transfer, or if you are done, cleanup the session by calling
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curl_easy_cleanup(3). If you want persistent connections, you do not
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cleanup immediately, but instead run ahead and perform other transfers using
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the same easy handle.
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