nginx 好东西，喜欢就下载

/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #if (NGX_HTTP_CACHE) static ngx_int_t ngx_http_upstream_cache(ngx_http_request_t *r, ngx_http_upstream_t *u); static ngx_int_t ngx_http_upstream_cache_get(ngx_http_request_t *r, ngx_http_upstream_t *u, ngx_http_file_cache_t **cache); static ngx_int_t ngx_http_upstream_cache_send(ngx_http_request_t *r, ngx_http_upstream_t *u); static ngx_int_t ngx_http_upstream_cache_background_update( ngx_http_request_t *r, ngx_http_upstream_t *u); static ngx_int_t ngx_http_upstream_cache_check_range(ngx_http_request_t *r, ngx_http_upstream_t *u); static ngx_int_t ngx_http_upstream_cache_status(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_upstream_cache_last_modified(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_upstream_cache_etag(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); #endif static void ngx_http_upstream_init_request(ngx_http_request_t *r); static void ngx_http_upstream_resolve_handler(ngx_resolver_ctx_t *ctx); static void ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r); static void ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r); static void ngx_http_upstream_check_broken_connection(ngx_http_request_t *r, ngx_event_t *ev); static void ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u); static ngx_int_t ngx_http_upstream_reinit(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u, ngx_uint_t do_write); static ngx_int_t ngx_http_upstream_send_request_body(ngx_http_request_t *r, ngx_http_upstream_t *u, ngx_uint_t do_write); static void ngx_http_upstream_send_request_handler(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_read_request_handler(ngx_http_request_t *r); static void ngx_http_upstream_process_header(ngx_http_request_t *r, ngx_http_upstream_t *u); static ngx_int_t ngx_http_upstream_test_next(ngx_http_request_t *r, ngx_http_upstream_t *u); static ngx_int_t ngx_http_upstream_intercept_errors(ngx_http_request_t *r, ngx_http_upstream_t *u); static ngx_int_t ngx_http_upstream_test_connect(ngx_connection_t *c); static ngx_int_t ngx_http_upstream_process_headers(ngx_http_request_t *r, ngx_http_upstream_t *u); static ngx_int_t ngx_http_upstream_process_trailers(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_upgrade(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_upgraded_read_downstream(ngx_http_request_t *r); static void ngx_http_upstream_upgraded_write_downstream(ngx_http_request_t *r); static void ngx_http_upstream_upgraded_read_upstream(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_upgraded_write_upstream(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_process_upgraded(ngx_http_request_t *r, ngx_uint_t from_upstream, ngx_uint_t do_write); static void ngx_http_upstream_process_non_buffered_downstream(ngx_http_request_t *r); static void ngx_http_upstream_process_non_buffered_upstream(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_process_non_buffered_request(ngx_http_request_t *r, ngx_uint_t do_write); #if (NGX_THREADS) static ngx_int_t ngx_http_upstream_thread_handler(ngx_thread_task_t *task, ngx_file_t *file); static void ngx_http_upstream_thread_event_handler(ngx_event_t *ev); #endif static ngx_int_t ngx_http_upstream_output_filter(void *data, ngx_chain_t *chain); static void ngx_http_upstream_process_downstream(ngx_http_request_t *r); static void ngx_http_upstream_process_upstream(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_process_request(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_store(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_dummy_handler(ngx_http_request_t *r, ngx_http_upstream_t *u); static void ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u, ngx_uint_t ft_type); static void ngx_http_upstream_cleanup(void *data); static void ngx_http_upstream_finalize_request(ngx_http_request_t *r, ngx_http_upstream_t *u, ngx_int_t rc); static ngx_int_t ngx_http_upstream_process_header_line(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_content_length(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_last_modified(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_set_cookie(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_cache_control(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_ignore_header_line(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_expires(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_accel_expires(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_limit_rate(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_buffering(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_charset(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_connection(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_transfer_encoding(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_process_vary(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_copy_header_line(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_copy_content_type(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_copy_last_modified(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_rewrite_location(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_rewrite_set_cookie(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_copy_allow_ranges(ngx_http_request_t *r, ngx_table_elt_t *h, ngx_uint_t offset); static ngx_int_t ngx_http_upstream_add_variables(ngx_conf_t *cf); static ngx_int_t ngx_http_upstream_addr_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_upstream_status_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_upstream_response_time_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_upstream_response_length_variable( ngx_http_request_t *r, ng