Win10 compiles curl library source code with cmake3.22 and vs2019 and calls

curl Is a use of URL Syntax file transfer tool that works on the command line , Support many kinds of http Request operation , For details, please refer to Linux curl The most complete and detailed explanation of the command _Angel_CG The blog of -CSDN Blog _curl command .curl Now in linux And win10 Built in , You can use... Directly from the command line curl Instructions . Bloggers have been looking for it for a long time , None of them are applicable to vs Of curl win10 library , So I found curl The source code of the library has been compiled , And through the command line call and c++ call .

curl Download the source code of the library ：https://github.com/curl/curl

Blogger compilation environment ：vs2019,cmake3.22 （ There are no special settings during compilation , So the blogger decided to do something else vs、cnake The version should also be completely OK ）

1、 Download and extract the source code

stay github After downloading zip After unpacking the package, you will get the following directory structure , And create... In the following directory build Catalog （ For subsequent cmake）.

 2、cmake Generate vs project

open cmake, Match the source code path to build Fill in the path to the corresponding position in the following figure . Then click Configure( The process will pop up vs Options , Select the default value )、Generate、Open Project. Click on Open Project Will be in vs Open project in .

3、vs Generate library files

here VS The interface is shown in the following figure , First install your own requirements Release/Debug ,x64/32 Equal Edition . then , Click Select ALL_BUILD project , Right click and click generate in the pop-up interface . Last , Project generation succeeded . The output results can be seen in the red box at the bottom of the figure below .

Get into build Catalog , The generated file directory is as follows .

 

  Generated lib And dll As shown in the figure below

  Generated curl.exe As shown in the figure below , The red box shows the bloggers' followers lib/Release Copy it . Because execution curl.exe Need to call libcurl.dll.

4、curl.exe test

With the system's own curl comparison , Compiled by bloggers curl.exe Obviously not https,ftps And so on , In contrast, bloggers do not configure at compile time openssl Caused by .

5、libcurl test

First step   newly build vs c++ Empty item

The second step   To configure vs project

Configure... In the appropriate location include、lib The path of . And in the linker -》 Input -》 Configure... In additional dependencies libcurl_imp.lib;

  The third step To write C++ Test code

The test code is as follows

#include <iostream>
#include <string>

#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>

#include <curl/curl.h>

using namespace std;

bool read_file(const char* path, const char* local_file)
{
    cout << "download " << path << " to local: " << local_file << endl;

    string url = path;

    CURL* conn = curl_easy_init();
    if (conn == NULL) {
        fprintf(stderr, "Failed to create CURL connection\n");
        return false;
    }

    std::cout << "down file from:" << url << std::endl;
    curl_easy_setopt(conn, CURLOPT_URL, url.c_str());
    // Set no authentication https Of ssl certificate 
    curl_easy_setopt(conn, CURLOPT_SSL_VERIFYPEER, 0);
    curl_easy_setopt(conn, CURLOPT_SSL_VERIFYHOST, 0)
        ;
    curl_easy_setopt(conn, CURLOPT_HTTPAUTH, CURLAUTH_GSSNEGOTIATE);
    curl_easy_setopt(conn, CURLOPT_USERNAME, "");
    curl_easy_setopt(conn, CURLOPT_PASSWORD, "");
    curl_easy_setopt(conn, CURLOPT_COOKIE, "cookiejar.txt");// Set up cookie 【 Occurs on the server 】
    curl_easy_setopt(conn, CURLOPT_COOKIEFILE, "cookiejar.txt");// Set up cookie 【 Server operations cookie After saving 】
    //curl_easy_setopt(conn, CURLOPT_NOPROGRESS, 1L);
    //curl_easy_setopt(conn, CURLOPT_WRITEFUNCTION, write_data);

    FILE* target = fopen(local_file, "wb");
    if (target == NULL) {
        fprintf(stderr, "Failed to open [%s], errno: %d\n", local_file, errno);
        return false;
    }
    curl_easy_setopt(conn, CURLOPT_WRITEDATA, target);
    CURLcode code = curl_easy_perform(conn);
    if (code != CURLE_OK) {
        fprintf(stderr, "Failed to get file [%s]\n", curl_easy_strerror(code));
        return false;
    }

    fclose(target);
    curl_easy_cleanup(conn);
    return true;
}
int main() {
    read_file("https://codeload.github.com/curl/curl/zip/refs/heads/master","curl.zip");
    return 0;
}

The code execution result is shown in the figure below , It should be noted that dll The file should be consistent with exe In the same path , Or will dll Add the path of the file to the system environment variable path in .