embed PHP と Stream API で HTTP/1 クライアント。最新版は https://github.com/masakielastic/php-embed-stream-http

stream-client.c

#include <php.h>
#include <Zend/zend_smart_str.h>
#include <sapi/embed/php_embed.h>
#include <main/php_streams.h>

static int run_min_client(void);

int main(int argc, char **argv)
{
    PHP_EMBED_START_BLOCK(argc, argv)

    (void) run_min_client();

    PHP_EMBED_END_BLOCK()

    return 0;
}

static int run_min_client(void)
{
    php_stream *stream = NULL;
    zend_string *target = NULL;
    zend_string *request = NULL;
    zend_string *errstr = NULL;
    smart_str response = {0};
    char buf[4096];
    ssize_t nread;
    int err = 0;

    const char *host = "example.com";
    const int port = 80;

    target = strpprintf(0, "tcp://%s:%d", host, port);
    if (target == NULL) {
        php_printf("failed to build target\n");
        return FAILURE;
    }

    stream = php_stream_xport_create(
        ZSTR_VAL(target),
        ZSTR_LEN(target),
        REPORT_ERRORS,
        STREAM_XPORT_CLIENT | STREAM_XPORT_CONNECT,
        NULL,
        NULL,
        NULL,
        &errstr,
        &err
    );

    if (stream == NULL) {
        php_printf(
            "connect failed: err=%d msg=%s\n",
            err,
            errstr ? ZSTR_VAL(errstr) : "(none)"
        );
        if (errstr) {
            zend_string_release(errstr);
        }
        zend_string_release(target);
        return FAILURE;
    }

    request = strpprintf(
        0,
        "GET / HTTP/1.1\r\n"
        "Host: %s\r\n"
        "User-Agent: embed-php-stream-client/0.1\r\n"
        "Accept: */*\r\n"
        "Connection: close\r\n"
        "\r\n",
        host
    );

    if (request == NULL) {
        php_printf("failed to build request\n");
        php_stream_close(stream);
        zend_string_release(target);
        return FAILURE;
    }

    if (php_stream_write(stream, ZSTR_VAL(request), ZSTR_LEN(request)) != (ssize_t) ZSTR_LEN(request)) {
        php_printf("write failed\n");
        zend_string_release(request);
        php_stream_close(stream);
        zend_string_release(target);
        return FAILURE;
    }

    while ((nread = php_stream_read(stream, buf, sizeof(buf))) > 0) {
        smart_str_appendl(&response, buf, nread);
    }

    smart_str_0(&response);

    if (response.s) {
        php_printf("=== response begin ===\n");
        PHPWRITE(ZSTR_VAL(response.s), ZSTR_LEN(response.s));
        php_printf("\n=== response end ===\n");
    } else {
        php_printf("no response\n");
    }

    smart_str_free(&response);
    zend_string_release(request);
    php_stream_close(stream);
    zend_string_release(target);

    return SUCCESS;
}