Hi, I'm writing an nginx module, it does something similar to the sub module. After some research I succeeded in handling the ngx_chain_t pointer passed to my body filter. My module seems to work well for static files. When my module is handling PHP responses (fastcgi), sometimes the ngx_chain_t pointer is NULL. I simply call the next body filter in such situation like the sub module body filter. However function ngx_http_write_filter() will fail, because r->out isn't NULL and the buf's in r->out are of zero size. My questions are: what's the meaning of r->out? how should I modify it in my body filter ? Could I simply return NGX_OK in my body filter without calling the next body filter if the ngx_chain_t pointer is NULL ?
Thanks Yao
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