libcurl Manuals & User Guides

User manuals, setup guides, troubleshooting help, and repair information for libcurl products.

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libcurl manuals

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libcurl Curl_Formfree – Free A Previously Build Multipart Formdata HTTP POST Chain Instructions

February 25, 2026

libcurl Curl_Formfree - Free A Previously Build Multipart Formdata HTTP POST Chain Product Information Specifications Name: curl_formfree Function: Free a previously built multipart/form data HTTP POST chain Version: libcurl 7.7.1 Release Date: 6 April 2001 NAME Curl_formfree - free a…

Brand: libcurl

Tutorial – Libcurl Programming Tutorial Instructions

February 25, 2026

Tutorial - Libcurl Programming Tutorial Specifications Product Name: libcurl-tutorial Description: A tutorial for programming with libcurl Language: C Interfaces: C interface (applies to other interfaces as well) SSL Support: Depends on build configuration Operating Systems: Compatible with various operating systems…

Brand: libcurl

Curl_Easy_Reset – Reset All Options Of A Libcurl Session Handle Instructions

February 25, 2026

Curl_Easy_Reset - Reset All Options Of A Libcurl Session Handle Specifications Name: libcurl Version: 7.12.1 NAME curl_easy_reset - reset all options of a libcurl session handle SYNOPSIS #include <curl/curl.h> void curl_easy_reset(CURL *handle); DESCRIPTION Re-initializes all options previously set on a…

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Curl_Easy_Cleanup – End A Libcurl Easy Session Instructions

February 25, 2026

Curl_Easy_Cleanup - End A Libcurl Easy Session Specifications Name: libcurl Function: curl_easy_cleanup Version: 7.7 Date: 13 Nov 2002 NAME curl_easy_cleanup - End a libcurl easy session SYNOPSIS #include <curl/curl.h> void curl_easy_cleanup(CURL *handle); DESCRIPTION This function must be the last function…

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Curl libcurl Multi – How To Use The Multi Interface Instructions

February 25, 2026

libcurl Multi - How To Use The Multi Interface Specifications Product Name: libcurl-multi Interface: libcurl multi interface Version: 7.10.1 Release Date: 13 Oct 2001 NAME libcurl-multi − how to use the multi interface DESCRIPTION This is an overview on how…

Brand: Curl libcurl

Curl_Free – Reclaim Memory That Has Been Obtained Through A Libcurl Call Instructions

February 25, 2026

Curl_Free - Reclaim Memory That Has Been Obtained Through A Libcurl Call Specifications Name: curl_free Version: 3 Library: libcurl NAME curl_free - reclaim memory that has been obtained through a libcurl call SYNOPSIS #include <curl/curl.h> void curl_free( char * ptr…

Brand: libcurl

libcurl Curl_Formadd – Add A Section To A Multipart Formdata Http Post Instructions

February 25, 2026

libcurl Curl_Formadd - Add A Section To A Multipart Formdata Http Post Specifications Function: curl_formadd Purpose: Add a section to a multipart/formdata HTTP POST Header: #include <curl/curl.h> NAME curl_formadd - add a section to a multipart/formdata HTTP POST SYNOPSIS #include…

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libcurl Curl_Global_Cleanup Instructions

February 25, 2026

libcurl Curl_Global_Cleanup Specifications Name: libcurl Version: 7.8 Date: 28 May 2001 NAME curl_global_cleanup - global libcurl cleanup SYNOPSIS #include <curl/curl.h> void curl_global_cleanup(void); DESCRIPTION curl_global_cleanup must be called once (no matter how many threads or libcurl sessions that’ll be used) by…

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libcurl Curl_Easy_Strerror – Return String Describing Error Code Instructions

February 25, 2026

libcurl Curl_Easy_Strerror - Return String Describing Error Code Specifications Name: curl_easy_strerror Version: libcurl 7.12.0 Release Date: 26 Apr 2004 NAME curl_easy_strerror - return string describing error code SYNOPSIS #include <curl/curl.h> const char *curl_easy_strerror(CURLcode errornum); DESCRIPTION The curl_easy_strerror() function returns a…

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Curl-Config – Get Information About A Libcurl Installation Instructions

February 25, 2026

Curl-Config - Get Information About A Libcurl Specifications Name: curl-config Purpose: Get information about a libcurl installation Version: Curl 7.10 Release Date: 8 Oct 2002 NAME curl-config − Get information about a libcurl installation SYNOPSIS curl-config [options] DESCRIPTION curl-config displays…

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libcurl Multi Interface: A Developer's Guide to Concurrent Network Transfers

developer guide • February 17, 2026

Learn how to effectively use the libcurl multi interface for concurrent network operations in C programs. This guide covers creating multi handles, managing multiple easy handles, performing asynchronous transfers, and optimizing network I/O with select() and poll().

Brand: libcurl

libcurl Tutorial

tutorial • February 17, 2026

A tutorial on using the libcurl library for data transfer, covering basic concepts, advanced features, and practical examples.

Brand: libcurl

curl_formadd(3) - libcurl Manual: Building Multipart/formdata HTTP POSTs

manual page • February 17, 2026

Learn how to use the curl_formadd() function from the libcurl manual to construct multipart/formdata HTTP POST requests, including details on names, content, file uploads, and options.

Brand: libcurl

libcurl curl_easy_getinfo(3) Function Manual

manual • February 17, 2026

Detailed documentation for the libcurl curl_easy_getinfo(3) function, explaining how to extract information from a curl handle, including available parameters like URLs, response codes, timing, and transfer sizes.

Brand: libcurl

libcurl Manual: curl_easy_setopt Function Options and Configuration

User Manual • February 17, 2026

A comprehensive technical manual detailing the libcurl `curl_easy_setopt` function. This guide explains how to configure a vast array of options for network requests, covering protocols like HTTP and FTP, SSL/TLS security, proxy settings, authentication, and fine-grained control over data transfer behavior. Essential…

Brand: libcurl

libcurl Overview: Client-Side URL Transfers

Technical Specification • February 17, 2026

Comprehensive overview of the libcurl library, a client-side URL transfer library for C. Covers its easy and multi interfaces, thread safety, persistent connections, linking instructions, and key functions for developers.

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libcurl Error Codes: Comprehensive Guide to libcurl Errors

guide • February 17, 2026

A detailed reference guide to libcurl error codes (CURLcode, CURLMcode, CURLSHcode), explaining their causes and how to resolve them. Essential for developers using the libcurl library.

Brand: libcurl

libcurl Manual Page: curl_mprintf Functions for Formatted Output

Manual Page • February 17, 2026

Detailed documentation for libcurl's C API functions: curl_mprintf, curl_mfprintf, curl_msprintf, and others. Learn about formatted string output and conversion within the libcurl library.

Brand: libcurl

libcurl curl_version_info(3) Manual - Get Runtime Version Information

Software Manual • February 17, 2026

Detailed documentation for the libcurl curl_version_info(3) function, explaining how to retrieve runtime version information, supported features, and library details.

Brand: libcurl

curl_multi_fdset.pdf - libcurl API Documentation

api documentation • February 17, 2026

Documentation for the curl_multi_fdset function in the libcurl library, detailing how to obtain file descriptors for multi-handle operations.

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curl_multi_info_read.pdf Documentation

documentation • February 17, 2026

Documentation for curl_multi_info_read.pdf, detailing information retrieval from multi-handle transfers in libcurl.

Brand: libcurl

curl_easy_perform Function - libcurl Documentation

api documentation • February 17, 2026

Detailed documentation for the curl_easy_perform function in the libcurl library, explaining its usage, parameters, return values, and error handling for performing network transfers.

Brand: libcurl