Curl request is failing on the SSL?

Question

I have this code

    if(ereg("^(https)",$url))
        curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,false);
    // execute, and log the result to curl_put.log
    $result = curl_exec($curl);


    $error = curl_error($curl);

The error specified is

SSL read: error:00000000:lib(0):func(0):reason(0), errno 104

Any ideas on the cause

Answer 1

I encountered a similar cryptic error while working with a third-party library. I tried the CURLOPT_SSL_VERIFY[PEER|HOST] but it made no difference. My error message was similar:

SSL read: error:00000000:lib(0):func(0):reason(0), errno 54

So I visited http://curl.haxx.se/libcurl/c/libcurl-errors.html, looking for the error code 54.

CURLE_SSL_ENGINE_SETFAILED (54) Failed setting the selected SSL crypto engine as default!

This was wrong though - I was making other HTTPS requests using curl in other parts of the application. So I kept digging and found this question, R & RCurl: Error 54 in libcurl, which had this gem:

The output you see is from lib/ssluse.c in libcurl's source code and the "errno" mentioned there is not the libcurl error code but the actual errno variable at that time.

So, don't let the output of curl_error() mislead you. Instead, use curl_errno() to obtain the correct error code, which in this case was actually 56, CURLE_RECV_ERROR. Had the wrong host name...