Mercurial > hg > nginx-quic
diff src/http/ngx_http_write_filter.c @ 1:d220029ac7f3
nginx-0.0.1-2002-08-15-21:20:26 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 15 Aug 2002 17:20:26 +0000 |
parents | |
children | 34a521b1a148 |
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new file mode 100644 --- /dev/null +++ b/src/http/ngx_http_write_filter.c @@ -0,0 +1,82 @@ + +#include <ngx_config.h> + +#include <ngx_hunk.h> +#include <ngx_http.h> +#include <ngx_http_filter.h> +#include <ngx_event_write.h> + +#include <ngx_http_write_filter.h> + + +ngx_http_module_t ngx_http_write_filter_module; + + +/* STUB */ +static ngx_http_write_filter_ctx_t module_ctx; + +void ngx_http_write_filter_init() +{ + module_ctx.buffer_output = 10240; + module_ctx.out = NULL; + + ngx_http_write_filter_module.ctx = &module_ctx; +} +/* */ + + +int ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *in) +{ + int last; + off_t size, flush; + ngx_chain_t *ch, **prev, *chain; + ngx_http_write_filter_ctx_t *ctx; + + ctx = (ngx_http_write_filter_ctx_t *) + ngx_get_module_ctx(r->main ? r->main : r, + &ngx_http_write_filter_module); + size = flush = 0; + last = 0; + prev = &ctx->out; + + /* find size, flush point and last link of saved chain */ + for (ch = ctx->out; ch; ch = ch->next) { + prev = &ch->next; + size += ch->hunk->last.file - ch->hunk->pos.file; + + if (ch->hunk->type & NGX_HUNK_FLUSH) + flush = size; + + if (ch->hunk->type & NGX_HUNK_LAST) + last = 1; + } + + /* add new chain to existent one */ + for (/* void */; in; in = in->next) { + ngx_test_null(ch, ngx_palloc(r->pool, sizeof(ngx_chain_t)), + NGX_HTTP_FILTER_ERROR); + + ch->hunk = in->hunk; + ch->next = NULL; + *prev = ch; + prev = &ch->next; + size += ch->hunk->last.file - ch->hunk->pos.file; + + if (ch->hunk->type & NGX_HUNK_FLUSH) + flush = size; + + if (ch->hunk->type & NGX_HUNK_LAST) + last = 1; + } + + if (flush == 0 && size < ctx->buffer_output) + return NGX_HTTP_FILTER_DONE; + + chain = ngx_event_write(r->connection, ctx->out, flush); + if (chain == (ngx_chain_t *) -1) + return NGX_HTTP_FILTER_ERROR; + + ctx->out = chain; + + return (chain ? NGX_HTTP_FILTER_AGAIN : NGX_HTTP_FILTER_DONE); +}