Ubuntu18.04.2 amd64編譯安裝libcurl支持https

1.准備工作，安裝ssl庫：

sudo apt-get install openssl
sudo apt-get install libssl-dev

2.下載libcurl源代碼：

wget https://curl.haxx.se/download/curl-7.65.3.tar.xz

3.解壓並進入源代碼目錄：

tar xf curl-7.65.3.tar.xz
cd curl-7.65.3

4.配置編譯選項：

./configure --prefix=/usr                           \
            --disable-static                        \
            --enable-threaded-resolver              \
            --with-ca-path=/etc/ssl/certs

5.編譯：

make

6.安裝（需要root權限）：

make install &&

rm -rf docs/examples/.deps &&

find docs \( -name Makefile\* -o -name \*.1 -o -name \*.3 \) -exec rm {} \; &&

install -v -d -m755 /usr/share/doc/curl-7.65.3 &&
cp -v -R docs/*     /usr/share/doc/curl-7.65.3

至此，編譯安裝完成。

 

寫代碼測試一下：

#include <stdio.h>
#include <curl/curl.h>
 
int main(void)
{
  CURL *curl;
  CURLcode res;
 
  curl_global_init(CURL_GLOBAL_DEFAULT);
 
  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://www.baidu.com/");
 
    /* Perform the request, res will get the return code */
    res = curl_easy_perform(curl);
    /* Check for errors */
    if(res != CURLE_OK)
      fprintf(stderr, "curl_easy_perform() failed: %s\n",
              curl_easy_strerror(res));
 
    /* always cleanup */
    curl_easy_cleanup(curl);
  }
 
  curl_global_cleanup();
 
  return 0;
}

編譯：

gcc hello_https.c -l curl -o hello_https

運行：

./hello_https

運行結果截圖：

 

 附 自定義回調處理響應數據代碼：

#include <stdio.h>
#include <curl/curl.h>

static size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
{
    if(stream == NULL) 
    return 0;
    printf("%s", ptr);
    return size * nmemb;
}

int main(void)
{
  CURL *curl;
  CURLcode res;
 
  curl_global_init(CURL_GLOBAL_DEFAULT);
 
  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://www.baidu.com/");
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
 
    /* Perform the request, res will get the return code */
    res = curl_easy_perform(curl);
    /* Check for errors */
    if(res != CURLE_OK)
      fprintf(stderr, "curl_easy_perform() failed: %s\n",
              curl_easy_strerror(res));
 
    /* always cleanup */
    curl_easy_cleanup(curl);
  }
 
  curl_global_cleanup();
 
  return 0;
}