如何正確使用ngx_write_chain_to_temp_file？

Question

我正在寫nginx模塊，它構造nginx鏈，然後將此鏈緩衝區寫入nginx臨時文件以稍後使用它（剛剛寫入後）。我一直在尋找每一個頁面，唯一的解決辦法拿出的是一個波紋管：

// Create temp file to test 
      ngx_temp_file_t *tf; 
      tf = ngx_pcalloc(r->pool, sizeof (ngx_temp_file_t)); 
      if (tf == NULL) { 
       return NGX_HTTP_INTERNAL_SERVER_ERROR; 
      } 
      tf->file.fd = NGX_INVALID_FILE; 
      tf->file.log = nlog; 
      tf->path = clcf->client_body_temp_path; 
      tf->pool = r->pool; 
      tf->log_level = r->request_body_file_log_level; 
      tf->persistent = r->request_body_in_persistent_file; 
      tf->clean = r->request_body_in_clean_file; 
      //  if (r->request_body_file_group_access) { 
      //   tf->access = 0660; 
      //  } 
      if (ngx_create_temp_file(&tf->file, tf->path, tf->pool, tf->persistent, tf->clean, tf->access) != NGX_OK) { 
       return NGX_HTTP_INTERNAL_SERVER_ERROR; 
      } 

      if (ngx_write_chain_to_temp_file(tf, bucket->first) == NGX_ERROR) { 
       return NGX_HTTP_INTERNAL_SERVER_ERROR; 
      } 

此代碼不會返回NGX_ERROR，那是不是意味着nginx的成功寫入臨時文件到client_body_temporay_path？答案是肯定的，之後我用fopen打開文件，文件不存在？

任何人都可以請給我正確的解決方案來處理ngx_write_chain_to_temp_file？

Answer 1

，我發現自己的解決方案

 ngx_temp_file_t *tf; 
     tf = ngx_pcalloc(r->pool, sizeof (ngx_temp_file_t)); 
     tf->file.fd = NGX_INVALID_FILE; 
     tf->file.log = nlog; 
     tf->path = clcf->client_body_temp_path; 
     tf->pool = r->pool; 
     tf->persistent = 1; 
     rc = ngx_create_temp_file(&tf->file, tf->path, tf->pool, tf->persistent, tf->clean, tf->access); 
     //ngx_write_chain_to_file(&tf->file, bucket->first, bucket->content_length, r->pool); 
     ngx_write_chain_to_temp_file(tf, bucket->first); 

我無法理解的唯一的事情是，如果我設置tf->persistent爲假（0），文件創建之後，我無法從中讀出，即使我沒有通過對output_filter的響應呢。