Getting an HTTP response status code of 0 and empty message using C curl library libCPR-CodePudding

I'm using

(Don't worry, I've modified the values.)

For Windows users there was a thread earlier this year about an issue with HTTPS requests, stemming from an issue with vcpkg. I am on macOS Big Sur (11.6.5) so this is not my issue.

Just 1 month ago there was a thread that seems relevant. 17 days ago they appear to have "fixed" this issue (PR #733)—so I have pointed CMake to the latest version of libcpr, 1.8.3:

include(FetchContent)
FetchContent_Declare(
        cpr GIT_REPOSITORY https://github.com/libcpr/cpr.git
        GIT_TAG db351ffbbadc6c4e9239daaa26e9aefa9f0ec82d) # 1.8.3
FetchContent_MakeAvailable(cpr)
target_link_libraries(myProgram PRIVATE cpr::cpr)

Still no go for me.

Here's what CMake outputs in case there's a hint in there I don't see:

-- Enabled curl SSL
-- curl version=[7.80.0]
-- Could NOT find LibSSH2 (missing: LIBSSH2_LIBRARY LIBSSH2_INCLUDE_DIR) 
-- CA path only supported by OpenSSL, GnuTLS or mbed TLS. Set CURL_CA_PATH=none or enable one of those TLS backends.
-- Enabled features: SSL IPv6 unixsockets libz AsynchDNS Largefile alt-svc HSTS
-- Enabled protocols: HTTP HTTPS
-- Enabled SSL backends: Secure Transport
-- Configuring done
-- Generating done

Multiple threads say that versions before 7.81.0 work fine.

I also tried adding the option cpr::VerifySsl{false}, but get back

SSL peer handshake failed, the server most likely requires a client certificate to connect

I kind of don't think that's the right path anyway.

Does anyone have ideas? Any other output or thing to try that might be useful?

CodePudding user response：

Of course, it's the simplest thing that I didn't try. This warning tipped me off:

-- Could NOT find LibSSH2 (missing: LIBSSH2_LIBRARY LIBSSH2_INCLUDE_DIR)

I simply did a brew install libssl2 and it now works.