static void rawstream_ensure_headers_sent(full_subscriber_t *fsub) {
ngx_http_request_t *r = fsub->sub.request;
//nchan_request_ctx_t *ctx = ngx_http_get_module_ctx(r, ngx_nchan_module);
if(!fsub->data.shook_hands) {
nchan_cleverly_output_headers_only_for_later_response(r);
fsub->data.shook_hands = 1;
}
}
static void chunked_ensure_headers_sent(full_subscriber_t *fsub) {
static ngx_str_t transfer_encoding_header = ngx_string("Transfer-Encoding");
static ngx_str_t transfer_encoding = ngx_string("chunked");
ngx_http_request_t *r = fsub->sub.request;
ngx_http_core_loc_conf_t *clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if(!fsub->data.shook_hands) {
clcf->chunked_transfer_encoding = 0;
//r->headers_out.content_type.len = content_type.len;
//r->headers_out.content_type.data = content_type.data;
nchan_add_response_header(r, &transfer_encoding_header, &transfer_encoding);
nchan_cleverly_output_headers_only_for_later_response(r);
fsub->data.shook_hands = 1;
}
}
static void multipart_ensure_headers_sent(full_subscriber_t *fsub) {
nchan_buf_and_chain_t *bc;
ngx_http_request_t *r = fsub->sub.request;
ngx_http_core_loc_conf_t *clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
nchan_request_ctx_t *ctx = ngx_http_get_module_ctx(r, nchan_module);
multipart_privdata_t *mpd = (multipart_privdata_t *)fsub->privdata;
if(!fsub->data.shook_hands) {
clcf->chunked_transfer_encoding = 0;
nchan_request_set_content_type_multipart_boundary_header(r, ctx);
nchan_cleverly_output_headers_only_for_later_response(r);
//set preamble in the request ctx. it would be nicer to store in in the subscriber data,
//but that would mean not reusing longpoll's fsub directly
if((bc = nchan_bufchain_pool_reserve(ctx->bcp, 1)) == NULL) {
ERR("can't reserve bufchain for multipart headers");
nchan_respond_status(fsub->sub.request, NGX_HTTP_INTERNAL_SERVER_ERROR, NULL, 1);
return;
}
ngx_memzero(&bc->buf, sizeof(ngx_buf_t));
bc->buf.start = mpd->boundary + 2;
bc->buf.pos = bc->buf.start;
bc->buf.end = mpd->boundary_end;
bc->buf.last = bc->buf.end;
bc->buf.memory = 1;
bc->buf.last_buf = 0;
bc->buf.last_in_chain = 1;
bc->buf.flush = 1;
nchan_output_filter(r, &bc->chain);
fsub->data.shook_hands = 1;
}
}
static void es_ensure_headers_sent(full_subscriber_t *fsub) {
static const ngx_str_t content_type = ngx_string("text/event-stream; charset=utf-8");
static const ngx_str_t hello = ngx_string(": hi\n\n");
ngx_http_request_t *r = fsub->sub.request;
ngx_http_core_loc_conf_t *clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
nchan_buf_and_chain_t bc;
nchan_request_ctx_t *ctx = ngx_http_get_module_ctx(r, nchan_module);
nchan_loc_conf_t *cf;
if(!fsub->data.shook_hands) {
clcf->chunked_transfer_encoding = 0;
r->headers_out.content_type.len = content_type.len;
r->headers_out.content_type.data = content_type.data;
r->headers_out.content_length_n = -1;
//send headers
if(ctx->request_origin_header.len > 0) {
cf = ngx_http_get_module_loc_conf(r, nchan_module);
nchan_add_response_header(r, &NCHAN_HEADER_ALLOW_ORIGIN, &cf->allow_origin);
}
nchan_cleverly_output_headers_only_for_later_response(r);
//send a ":hi" comment
ngx_init_set_membuf(&bc.buf, hello.data, hello.data + hello.len);
bc.chain.buf = &bc.buf;
bc.buf.last_buf = 0;
bc.buf.flush = 1;
bc.chain.next = NULL;
nchan_output_filter(fsub->sub.request, &bc.chain);
fsub->data.shook_hands = 1;
}
}
