Method build_request

src/proxy/http/HttpTransact.cc:7684–7820

}

void
HttpTransact::build_request(State *s, HTTPHdr *base_request, HTTPHdr *outgoing_request, HTTPVersion outgoing_version)
{
  // this part is to restore the original URL in case, multiple cache
  // lookups have happened - client request has been changed as the result
  //
  // notice that currently, based_request IS client_request
  if (base_request == &s->hdr_info.client_request) {
    if (!s->redirect_info.redirect_in_process) {
      // this is for multiple cache lookup
      URL *o_url = &s->cache_info.original_url;

      if (o_url->valid()) {
        base_request->url_get()->copy(o_url);
      }
    }

    // Perform any configured normalization (including per-remap-rule configuration overrides) of the Accept-Encoding header
    // field (if any).  This has to be done in the request from the client, for the benefit of the gzip plugin.
    //
    HttpTransactHeaders::normalize_accept_encoding(s->txn_conf, base_request);
  }

  HttpTransactHeaders::copy_header_fields(base_request, outgoing_request, s->txn_conf->fwd_proxy_auth_to_parent);
  add_client_ip_to_outgoing_request(s, outgoing_request);
  HttpTransactHeaders::add_forwarded_field_to_request(s, outgoing_request);
  HttpTransactHeaders::remove_privacy_headers_from_request(s->http_config_param, s->txn_conf, outgoing_request);
  HttpTransactHeaders::add_global_user_agent_header_to_request(s->txn_conf, outgoing_request);
  handle_request_keep_alive_headers(s, outgoing_version, outgoing_request);

  if (s->next_hop_scheme < 0) {
    s->next_hop_scheme = URL_WKSIDX_HTTP;
  }
  if (s->orig_scheme < 0) {
    s->orig_scheme = URL_WKSIDX_HTTP;
  }

  if (s->txn_conf->insert_request_via_string) {
    HttpTransactHeaders::insert_via_header_in_request(s, outgoing_request);
  }

  // We build 1.1 request header and then convert as necessary to
  //  the appropriate version in HttpTransact::build_request
  outgoing_request->version_set(HTTP_1_1);

  // Make sure our request version is defined
  ink_assert(outgoing_version != HTTP_0_9);

  // HttpTransactHeaders::convert_request(outgoing_version, outgoing_request); // commented out this idea
  URL *url = outgoing_request->url_get();

  // Remove fragment from upstream URL
  url->fragment_set(nullptr, 0);

  // Check whether a Host header field is missing from a 1.0 or 1.1 request.
  if (outgoing_version != HTTP_0_9 && !outgoing_request->presence(MIME_PRESENCE_HOST)) {
    int         host_len;
    const char *host = url->host_get(&host_len);