[GNUnet-SVN] [gnurl] 125/163: CURLINFO_TLS_SSL_PTR.3: improve the example

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ng0 pushed a commit to branch master
in repository gnurl.

commit 24cb114c53bd60495920c1aa3455290ea4b624dd
Author: Adrian Peniak <address@hidden>
AuthorDate: Thu Jun 28 06:56:16 2018 +0100

    CURLINFO_TLS_SSL_PTR.3: improve the example
    
    The previous example was a little bit confusing, because SSL* structure
    (or other "in use" SSL connection pointer) is not accessible after the
    transfer is completed, therefore working with the raw TLS library
    specific pointer needs to be done during transfer.
    
    Closes #2690
---
 docs/libcurl/opts/CURLINFO_TLS_SSL_PTR.3 | 35 ++++++++++++++++++++++++--------
 1 file changed, 27 insertions(+), 8 deletions(-)

diff --git a/docs/libcurl/opts/CURLINFO_TLS_SSL_PTR.3 
b/docs/libcurl/opts/CURLINFO_TLS_SSL_PTR.3
index 59ddd599c..c601e4fcf 100644
--- a/docs/libcurl/opts/CURLINFO_TLS_SSL_PTR.3
+++ b/docs/libcurl/opts/CURLINFO_TLS_SSL_PTR.3
@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <address@hidden>, et al.
+.\" * Copyright (C) 1998 - 2018, Daniel Stenberg, <address@hidden>, et al.
 .\" *
 .\" * This software is licensed as described in the file COPYING, which
 .\" * you should have received as part of this distribution. The terms
@@ -129,14 +129,33 @@ https://github.com/curl/curl/issues/685
 All TLS-based
 .SH EXAMPLE
 .nf
-CURL *curl = curl_easy_init();
-if(curl) {
+#include <curl/curl.h>
+#include <openssl/ssl.h>
+
+CURL *curl;
+static size_t wf(void *ptr, size_t size, size_t nmemb, void *stream)
+{
+  const struct curl_tlssessioninfo *info = NULL;
+  CURLcode res = curl_easy_getinfo(curl, CURLINFO_TLS_SSL_PTR, &info);
+  if(info && !res) {
+    if(CURLSSLBACKEND_OPENSSL == info->backend) {
+       printf("OpenSSL ver. %s\\n", SSL_get_version((SSL*)info->internals));
+    }
+  }
+  return size * nmemb;
+}
+
+int main(int argc, char** argv)
+{
   CURLcode res;
-  struct curl_tlssessioninfo *tls;
-  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com";);
-  res = curl_easy_perform(curl);
-  curl_easy_getinfo(curl, CURLINFO_TLS_SSL_PTR, &tls);
-  curl_easy_cleanup(curl);
+  curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com";);
+    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, wf);
+    res = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
+  }
+  return res;
 }
 .fi
 .SH AVAILABILITY

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