Hi everyone,
I'm trying to retrieve some data from a url using curl. I'm using the following code here:

void main()
{
        ubyte[] data;

        CURL* curl = curl_easy_init();
        curl_easy_setopt(curl, CurlOption.url, "<Private HTTPS Url>".toStringz);
        curl_easy_setopt(curl, CurlOption.writefunction, &callback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &data);
        curl_easy_setopt(curl, CurlOption.ssl_verifyhost, false);
        curl_easy_setopt(curl, CurlOption.ssl_verifypeer, false);
        curl_easy_setopt(curl, CurlOption.verbose, 1);

	curl_easy_perform(curl);

        curl_easy_cleanup(curl);
}

But it's not working. I'm always getting the following error:

* About to connect() to <Private HTTPS Url> 443 (#0)
*   Trying <IP Address>...
* Connected to <Private HTTPS Url> (<IP Address>) port 443 (#0)
* found 160 certificates in /etc/ssl/certs/ca-certificates.crt
* gnutls_handshake() failed: A TLS packet with unexpected length was received.
* Closing connection 0

When using the get()-function provided by std.net.curl:

void main()
{
        get("<Private HTTPS Url>");
        // OR:
        HTTP h = HTTP("<Private HTTPS Url>");
        h.verifyHost = false;
        h.verifyPeer = false;
        h.verbose = true;
        h.perform();

}

I'm getting a similar error:

* About to connect() to <Private HTTPS Url> port 443 (#0)
*   Trying <IP Address>...
* Connected to <Private HTTPS Url> (<IP Address>) port 443 (#0)
* found 160 certificates in /etc/ssl/certs/ca-certificates.crt
* gnutls_handshake() failed: A TLS packet with unexpected length was received.
* Closing connection 0
std.net.curl.CurlException@/home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/src/std/net/curl.d(3606): SSL connect error on handle 1C76E0
----------------
0x86363 pure @safe bool std.exception.enforceEx!(std.net.curl.CurlException).enforceEx!(bool).enforceEx(bool, lazy immutable(char)[], immutable(char)[], uint)
        /home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/src/std/exception.d:546
0x79eff void std.net.curl.Curl._check(int)
        /home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/src/std/net/curl.d:3606
0x7be2b int std.net.curl.Curl.perform(bool)
        /home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/src/std/net/curl.d:3721
0x7be2b int std.net.curl.HTTP._perform(bool)
        /home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/src/std/net/curl.d:2234
0xee23 _Dmain
        ???:0
0x154e3 _D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv
        /home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/libdruntime/rt/dmain2.d:411
0x156a7 void rt.dmain2._d_run_main(int, char**, extern (C) int function(char[][])*).tryExec(scope void delegate())
        /home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/libdruntime/rt/dmain2.d:386
0x15abf void rt.dmain2._d_run_main(int, char**, extern (C) int function(char[][])*).runAll()
        /home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/libdruntime/rt/dmain2.d:411
0x156a7 void rt.dmain2._d_run_main(int, char**, extern (C) int function(char[][])*).tryExec(scope void delegate())
        /home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/libdruntime/rt/dmain2.d:386
0x1582f _d_run_main
        /home/build/tmp/build/.build/src/gcc-5.2.0/libphobos/libdruntime/rt/dmain2.d:419
0xec8f main
        ???:0
0xb6d83451 __libc_start_main
        ???:0

I want skip the ssl-validation but it seems that curl is always trying to verify the ssl certificate, although I think I've disabled it by setting ssl_verifyhost and ssl_verifypeer to false/0. I can use other ssl urls without any problems...
I'm using the latest gdc arm compiler with dmd 2.066.1

I hope anyone know what I'm doing wrong here :)

On Tuesday, 18 October 2016 at 17:39:45 UTC, Nrgyzer wrote:
> But it's not working. I'm always getting the following error:

What happens if you go to that HTTPS url in your normal web browser?

I kinda expect the server isn't actually running https.

On Tuesday, 18 October 2016 at 17:49:16 UTC, Adam D. Ruppe wrote:
> On Tuesday, 18 October 2016 at 17:39:45 UTC, Nrgyzer wrote:
>> But it's not working. I'm always getting the following error:
>
> What happens if you go to that HTTPS url in your normal web browser?
>
> I kinda expect the server isn't actually running https.

I can access the page and when I run curl from the cli I'm also retrieving the data:

odroid@odroid-server:/tmp/arm-unknown-linux-gnueabihf/bin$ curl <Private HTTPS Url> -verbose >> /tmp/test
* About to connect() to <Private HTTPS Url> port 443 (#0)
*   Trying <Ip Address>...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0* Connected to <Private HTTPS Url> (<Ip Address>) port 443 (#0)
* successfully set certificate verify locations:
*   CAfile: none
  CApath: /etc/ssl/certs
* SSLv3, TLS handshake, Client hello (1):
} [data not shown]
* SSLv3, TLS handshake, Server hello (2):
{ [data not shown]
* SSLv3, TLS handshake, CERT (11):
{ [data not shown]
* SSLv3, TLS handshake, Server key exchange (12):
{ [data not shown]
* SSLv3, TLS handshake, Server finished (14):
{ [data not shown]
* SSLv3, TLS handshake, Client key exchange (16):
} [data not shown]
* SSLv3, TLS change cipher, Client hello (1):
} [data not shown]
* SSLv3, TLS handshake, Finished (20):
} [data not shown]
* SSLv3, TLS change cipher, Client hello (1):
{ [data not shown]
* SSLv3, TLS handshake, Finished (20):
{ [data not shown]
* SSL connection using ECDHE-RSA-AES256-SHA
* Server certificate:
*        subject: <Hidden for privacy purposes>
*        start date: 2015-11-14 00:00:00 GMT
*        expire date: 2016-11-19 23:59:59 GMT
*        subjectAltName: <Hidden for privacy purposes> matched
*        issuer: C=GB; ST=Greater Manchester; L=Salford; O=COMODO CA Limited; CN=COMODO RSA Extended Validation Secure Server CA
*        SSL certificate verify ok.
> GET /api/GetMarkets HTTP/1.1
> User-Agent: curl/7.29.0
> Host: <Private HTTPS Url>
> Accept: */*
> Referer: rbose
>
  0     0    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0< HTTP/1.1 200 OK
< Cache-Control: no-cache
< Pragma: no-cache
< Content-Type: application/json; charset=utf-8
< Expires: -1
< Server: Microsoft-IIS/8.5
< X-AspNet-Version: 4.0.30319
< Date: Tue, 18 Oct 2016 17:57:54 GMT
< Content-Length: 567103
<
{ [data not shown]
100  553k  100  553k    0     0   219k      0  0:00:02  0:00:02 --:--:--  219k
* Connection #0 to host <Private HTTPS Url> left intact