eefcc1bda4
curldown is this new file format for libcurl man pages. It is markdown inspired with differences: - Each file has a set of leading headers with meta-data - Supports a small subset of markdown - Uses .md file extensions for editors/IDE/GitHub to treat them nicely - Generates man pages very similar to the previous ones - Generates man pages that still convert nicely to HTML on the website - Detects and highlights mentions of curl symbols automatically (when their man page section is specified) tools: - cd2nroff: converts from curldown to nroff man page - nroff2cd: convert an (old) nroff man page to curldown - cdall: convert many nroff pages to curldown versions - cd2cd: verifies and updates a curldown to latest curldown This setup generates .3 versions of all the curldown versions at build time. CI: Since the documentation is now technically markdown in the eyes of many things, the CI runs many more tests and checks on this documentation, including proselint, link checkers and tests that make sure we capitalize the first letter after a period... Closes #12730
1.9 KiB
| c | SPDX-License-Identifier | Title | Section | Source | See-also | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Copyright (C) Daniel Stenberg, <daniel.se>, et al. | curl | libcurl | 3 | libcurl |
|
NAME
libcurl-easy - easy interface overview
DESCRIPTION
When using libcurl's "easy" interface you init your session and get a handle (often referred to as an "easy handle"), which you use as input to the easy interface functions you use. Use curl_easy_init(3) to get the handle.
You continue by setting all the options you want in the upcoming transfer, the most important among them is the URL itself (you cannot transfer anything without a specified URL as you may have figured out yourself). You might want to set some callbacks as well that are called from the library when data is available etc. curl_easy_setopt(3) is used for all this.
CURLOPT_URL(3) is the only option you really must set, as otherwise there can be no transfer. Another commonly used option is CURLOPT_VERBOSE(3) that helps you see what libcurl is doing under the hood, which is useful when debugging for example. The curl_easy_setopt(3) man page has a full index of the almost 300 available options.
If you at any point would like to blank all previously set options for a single easy handle, you can call curl_easy_reset(3) and you can also make a clone of an easy handle (with all its set options) using curl_easy_duphandle(3).
When all is setup, you tell libcurl to perform the transfer using curl_easy_perform(3). It performs the entire transfer operation and does not return until it is done (successfully or not).
After the transfer has been made, you can set new options and make another transfer, or if you are done, cleanup the session by calling curl_easy_cleanup(3). If you want persistent connections, you do not cleanup immediately, but instead run ahead and perform other transfers using the same easy handle.