Method CurlFileHandle

src/networkfilemanager.cpp:1625–1684

// ---------------------------------------------------------------------------

CurlFileHandle::CurlFileHandle(PJ_CONTEXT *ctx, const char *url, CURL *handle)
    : m_url(url), m_handle(handle) {
    CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_URL, m_url.c_str()));

    if (getenv("PROJ_CURL_VERBOSE"))
        CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_VERBOSE, 1));

// CURLOPT_SUPPRESS_CONNECT_HEADERS is defined in curl 7.54.0 or newer.
#if LIBCURL_VERSION_NUM >= 0x073600
    CHECK_RET(ctx,
              curl_easy_setopt(handle, CURLOPT_SUPPRESS_CONNECT_HEADERS, 1L));
#endif

    // Enable following redirections.  Requires libcurl 7.10.1 at least.
    CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_FOLLOWLOCATION, 1));
    CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_MAXREDIRS, 10));

    if (getenv("PROJ_UNSAFE_SSL")) {
        CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_SSL_VERIFYPEER, 0L));
        CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_SSL_VERIFYHOST, 0L));
    }

#if defined(SSL_OPTIONS)
    // https://curl.se/libcurl/c/CURLOPT_SSL_OPTIONS.html
    auto ssl_options = static_cast<long>(SSL_OPTIONS);
#if CURL_AT_LEAST_VERSION(7, 71, 0)
    if (pj_context_get_native_ca(ctx)) {
        ssl_options = ssl_options | CURLSSLOPT_NATIVE_CA;
    }
#endif
    CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_SSL_OPTIONS, ssl_options));
#else
#if CURL_AT_LEAST_VERSION(7, 71, 0)
    if (pj_context_get_native_ca(ctx)) {
        CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_SSL_OPTIONS,
                                        (long)CURLSSLOPT_NATIVE_CA));
    }
#endif
#endif

    const auto ca_bundle_path = pj_context_get_bundle_path(ctx);
    if (!ca_bundle_path.empty()) {
        CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_CAINFO,
                                        ca_bundle_path.c_str()));
    }

    CHECK_RET(ctx,
              curl_easy_setopt(handle, CURLOPT_ERRORBUFFER, m_szCurlErrBuf));

    if (getenv("PROJ_NO_USERAGENT") == nullptr) {
        m_useragent = "PROJ " STR(PROJ_VERSION_MAJOR) "." STR(
            PROJ_VERSION_MINOR) "." STR(PROJ_VERSION_PATCH);
        const auto exeName = GetExecutableName();
        if (!exeName.empty()) {
            m_useragent = exeName + " using " + m_useragent;
        }
        CHECK_RET(ctx, curl_easy_setopt(handle, CURLOPT_USERAGENT,
                                        m_useragent.data()));