Hello there!, I am using libcurl to interface with over the shelf http server box and having issue with authentication while using “CURLOPT_CONNECT_ONLY” option to be able to use curl_easy_send() and curl_easy_recv(), so my question is:
How to (Basic) authenticate when using “CURLOPT_CONNECT_ONLY” so I can use non-blocking curl_easy_send() and curl_easy_recv() ? To give some background, I am able to authenticate and able to work with the box with the blocked call ( without CURLOPT_CONNECT_ONLY option) with no control over the curl connection. The problem is, since the response from the box is a stream of data there is no way for me to stop the stream and send an another request. So from the documentation I figured out “CURLOPT_CONNECT_ONLY” is the way to go, and using the socket handle I can manage the communication to the box but after adding “CURLOPT_CONNECT_ONLY” option, I am not receiving the data stream as expected, I guess my request went through as there are no errors thrown, but looking closely I did not see authentication happening – I assume that is the problem, I am not doing anything fancy here just basic authentication only. Searched the web but could not get an answer and I am stuck. What am I missing here, does this option go in tandem with some other option I could not figure out or is there a different approach to authenticate while using this option. Below is the verbose logs I captured with and without the option and very much appreciate your help. With CURLOPT_CONNECT_ONLY option: Curl Version is libcurl/7.73.0 HTTPS query = http://192.168.16.10/emp/ curl_test_main ... send:POST / HTTP/1.1 Content-Type: application/json { Json: data } * STATE: INIT => CONNECT handle 0x1cba3bb3c20; line 1796 (connection #-5000) * Added connection 0. The cache now contains 1 members * family0 == v4, family1 == v6 * Trying 192.168.16.10:80... * STATE: CONNECT => WAITCONNECT handle 0x1cba3bb3c20; line 1857 (connection #0) * Connected to 192.168.16.10 (192.168.16.10) port 80 (#0) * STATE: WAITCONNECT => SENDPROTOCONNECT handle 0x1cba3bb3c20; line 1990 (connection #0) * Marked for [keep alive]: HTTP default * STATE: SENDPROTOCONNECT => DO handle 0x1cba3bb3c20; line 2011 (connection #0) * STATE: DO => DONE handle 0x1cba3bb3c20; line 2042 (connection #0) * multi_done * Connection #0 to host 192.168.16.10 left intact * Expire cleared (transfer 0x1cba3bb3c20) curl_easy_perform Sending request. Sent 235 bytes. Reading response. Transfer rate: 0 KB/sec (0 bytes in 0 seconds) Without CURLOPT_CONNECT_ONLY option: Curl Version is libcurl/7.73.0 HTTPS query = http://192.168.16.10/emp/ curl_test_main ... curl_easy_perform ... * STATE: INIT => CONNECT handle 0x209e919b2a0; line 1796 (connection #-5000) * Added connection 0. The cache now contains 1 members * family0 == v4, family1 == v6 * Trying 192.168.16.10:80... * STATE: CONNECT => WAITCONNECT handle 0x209e919b2a0; line 1857 (connection #0) * Connected to 192.168.16.10 (192.168.16.10) port 80 (#0) * STATE: WAITCONNECT => SENDPROTOCONNECT handle 0x209e919b2a0; line 1990 (connection #0) * Marked for [keep alive]: HTTP default * STATE: SENDPROTOCONNECT => DO handle 0x209e919b2a0; line 2011 (connection #0) * Server auth using Basic with user 'admin' > POST /emp/ HTTP/1.1 Host: 192.168.16.10 Authorization: Basic YWRtaW46cGFzcw== Accept: */* Content-Type: application/json Content-Length: 1471 * upload completely sent off: 1471 out of 1471 bytes * STATE: DO => DO_DONE handle 0x209e919b2a0; line 2082 (connection #0) * STATE: DO_DONE => PERFORM handle 0x209e919b2a0; line 2203 (connection #0) * Mark bundle as not supporting multiuse * HTTP 1.1 or later with persistent connection < HTTP/1.1 200 OK < Server: nginx/1.6.2 < Date: Fri, 16 Jul 2021 17:29:28 GMT < Content-Type: text/event-stream < Transfer-Encoding: chunked < Connection: keep-alive < X-CRFS-MissionProcessor-Software-Version: 1.5.1.19 < X-CRFS-MissionProcessor-Protocol-Version: 0.10 < Access-Control-Allow-Origin: * < Cache-Control: private, max-age=0 < X-Content-Type-Options: nosniff < X-XSS-Protection: 1; mode=block < Thanks for help in advance!!
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