Function web_http_request

ds4_web.c:245–292

}

static char *web_http_request(const char *method, int port, const char *path,
                              char *err, size_t err_len) {
    int fd = web_tcp_connect("127.0.0.1", port, DS4_WEB_CONNECT_TIMEOUT_MS,
                             err, err_len);
    if (fd < 0) return NULL;
    web_buf req = {0};
    char line[512];
    snprintf(line, sizeof(line),
             "%s %s HTTP/1.1\r\nHost: 127.0.0.1:%d\r\nConnection: close\r\n\r\n",
             method, path, port);
    web_buf_puts(&req, line);
    if (web_write_all(fd, req.ptr, req.len) != 0) {
        web_set_err(err, err_len, "write HTTP request failed: %s", strerror(errno));
        close(fd);
        free(req.ptr);
        return NULL;
    }
    free(req.ptr);

    web_buf resp = {0};
    char tmp[4096];
    for (;;) {
        ssize_t n = web_read_some(fd, tmp, sizeof(tmp), DS4_WEB_CONNECT_TIMEOUT_MS);
        if (n < 0) {
            web_set_err(err, err_len, "read HTTP response failed: %s", strerror(errno));
            close(fd);
            free(resp.ptr);
            return NULL;
        }
        if (n == 0) break;
        web_buf_append(&resp, tmp, (size_t)n);
    }
    close(fd);
    if (!resp.ptr) {
        web_set_err(err, err_len, "empty HTTP response");
        return NULL;
    }
    char *body = strstr(resp.ptr, "\r\n\r\n");
    if (!body) {
        web_set_err(err, err_len, "malformed HTTP response");
        free(resp.ptr);
        return NULL;
    }
    body += 4;
    char *out = web_xstrdup(body);
    free(resp.ptr);
    return out;
}

static bool web_cdp_alive(ds4_web *web) {
    char err[160] = {0};