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libcurl Manuals & User Guides

libcurl is a free, open-source client-side URL transfer library supporting extensive protocols including HTTP, HTTPS, FTP, and SMTP for various software applications.

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libcurl manuals

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libcurl Curl – Transfer A URL Instructions

February 25, 2026
libcurl Curl - Transfer A URL Specifications Feature Description Protocols HTTP, HTTPS, FTP, FTPS, GOPHER, DICT, TELNET, LDAP, FILE Authentication Basic, Digest, NTLM, Negotiate Data Transfer POST, GET, Upload, Download…

Libcurl – Client-Side URL Transfers Instructions

February 25, 2026
Libcurl - Client-Side URL Transfers Specifications Product: libcurl Version: 7.9.6 Release Date: 19 March 2002 NAME libcurl − client-side URL transfers DESCRIPTION This is an overview on how to use…

Libcurl-Errors – Error Codes In Libcurl Instructions

February 25, 2026
Libcurl-Errors - Error Codes In Libcurl Specifications Product Name: libcurl-errors Version: 7.11.0 Release Date: 8 Mar 2004 NAME libcurl-errors − error codes in libcurl DESCRIPTION This man page includes most,…

libcurl curl_getenv(3) Manual Page

manual
Documentation for the libcurl C function curl_getenv(3), a portable wrapper for getenv() used to retrieve environment variable values. Details its synopsis, description, availability, return value, and notes.

libcurl Easy Interface: Overview and Usage Guide

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Learn how to use the libcurl easy interface for network transfers, covering initialization, option setting, performing transfers, and cleanup with curl_easy_init, curl_easy_setopt, curl_easy_perform, and curl_easy_cleanup.