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#ifndef _LIGHTTPD_VIRTUALREQUEST_H_
#define _LIGHTTPD_VIRTUALREQUEST_H_
#ifndef _LIGHTTPD_BASE_H_
#error Please include <lighttpd/base.h> instead of this file
#endif
#include <lighttpd/jobqueue.h>
typedef enum {
/* waiting for request headers */
LI_VRS_CLEAN,
/* all headers received, now handling them, set up input filters
* this state is set by the previous vrequest after VRS_WROTE_RESPONSE_HEADERS (or the main connection),
* and the handle_request function is called (which execute the action stack by default)
*/
LI_VRS_HANDLE_REQUEST_HEADERS,
/* request headers handled, input filters ready; now content is accepted
* this state is set via handle_indirect (handle_direct skips to LI_VRS_HANDLE_RESPONSE_HEADERS
*/
LI_VRS_READ_CONTENT,
/* all response headers written, now set up output filters */
LI_VRS_HANDLE_RESPONSE_HEADERS,
/* output filters ready, content can be written */
LI_VRS_WRITE_CONTENT,
/* request done */
/* VRS_END, */
LI_VRS_ERROR
} liVRequestState;
typedef liHandlerResult (*liFilterHandlerCB)(liVRequest *vr, liFilter *f);
typedef void (*liFilterFreeCB)(liVRequest *vr, liFilter *f);
typedef G_GNUC_WARN_UNUSED_RESULT gboolean (*liVRequestHandlerCB)(liVRequest *vr);
typedef liHandlerResult (*liVRequestPluginHandlerCB)(liVRequest *vr, liPlugin *p);
typedef gboolean (*liVRequestCheckIOCB)(liVRequest *vr);
struct liConCallbacks {
liVRequestHandlerCB
handle_request_headers,
handle_response_headers, handle_response_body,
handle_response_error; /* this is _not_ for 500 - internal error */
liVRequestCheckIOCB handle_check_io;
};
/* this data "belongs" to a vrequest, but is updated by the connection code */
struct liConInfo {
const liConCallbacks *callbacks;
liSocketAddress remote_addr, local_addr;
GString *remote_addr_str, *local_addr_str;
gboolean is_ssl;
gboolean keep_alive;
/* bytes in our "raw-io-out-queue" that hasn't be sent yet. (whatever "sent" means - in ssl buffer, kernel, ...) */
goffset out_queue_length;
/* use li_vrequest_update_stats_{in,out} to update this */
struct {
guint64 bytes_in; /* total number of bytes received */
guint64 bytes_out; /* total number of bytes sent */
ev_tstamp last_avg;
guint64 bytes_in_5s; /* total number of bytes received at last 5s interval */
guint64 bytes_out_5s; /* total number of bytes sent at last 5s interval */
guint64 bytes_in_5s_diff; /* diff between bytes received at 5s interval n and interval n-1 */
guint64 bytes_out_5s_diff; /* diff between bytes sent at 5s interval n and interval n-1 */
} stats;
};
struct liFilter {
liChunkQueue *in, *out;
liFilterHandlerCB handle_data;
liFilterFreeCB handle_free;
gpointer param;
/* do not modify these yourself: */
gboolean knows_out_is_closed, done;
};
struct liFilters {
GPtrArray *queue;
liChunkQueue *in, *out;
};
struct liVRequest {
liConInfo *coninfo;
liWorker *wrk;
liOptionValue *options;
liOptionPtrValue **optionptrs;
liLogContext log_context;
liVRequestState state;
ev_tstamp ts_started;
GPtrArray *plugin_ctx;
liPlugin *backend;
liRequest request;
liPhysical physical;
liResponse response;
/* environment entries will be passed to the backends */
liEnvironment env;
/* -> vr_in -> filters_in -> in_memory ->(buffer_on_disk) -> in -> handle -> out -> filters_out -> vr_out -> */
gboolean cq_memory_limit_hit; /* stop feeding chunkqueues with memory chunks */
liFilters filters_in, filters_out;
liChunkQueue *vr_in, *vr_out, *in_memory;
liChunkQueue *in, *out;
liFilterBufferOnDiskState in_buffer_state;
liActionStack action_stack;
gboolean actions_wait_for_response;
liJob job;
13 years ago
GPtrArray *stat_cache_entries;
/* I/O throttling */
gboolean throttled; /* TRUE if vrequest is throttled */
struct {
gint magazine; /* currently available for use */
struct {
liThrottlePool *ptr; /* NULL if not in any throttling pool */
GList lnk;
GQueue *queue;
gint magazine;
} pool;
struct {
liThrottlePool *ptr;
GList lnk;
GQueue *queue;
gint magazine;
} ip;
struct {
gint rate; /* maximum transfer rate in bytes per second, 0 if unlimited */
ev_tstamp last_update;
} con;
liWaitQueueElem wqueue_elem;
} throttle;
};
#define VREQUEST_WAIT_FOR_RESPONSE_HEADERS(vr) \
do { \
if (vr->state == LI_VRS_HANDLE_REQUEST_HEADERS) { \
VR_ERROR(vr, "%s", "Cannot wait for response headers as no backend handler found - fix your config"); \
return LI_HANDLER_ERROR; \
} else if (vr->state < LI_VRS_HANDLE_RESPONSE_HEADERS) { \
return LI_HANDLER_WAIT_FOR_EVENT; \
} \
} while (0)
LI_API liVRequest* li_vrequest_new(liWorker *wrk, liConInfo *coninfo);
LI_API void li_vrequest_free(liVRequest *vr);
/* if keepalive = TRUE, you either have to reset it later again with FALSE or call li_vrequest_start before reusing the vr;
* keepalive = TRUE doesn't reset the vr->request fields, so mod_status can show the last request data in the keep-alive state
*/
LI_API void li_vrequest_reset(liVRequest *vr, gboolean keepalive);
LI_API liFilter* li_vrequest_add_filter_in(liVRequest *vr, liFilterHandlerCB handle_data, liFilterFreeCB handle_free, gpointer param);
LI_API liFilter* li_vrequest_add_filter_out(liVRequest *vr, liFilterHandlerCB handle_data, liFilterFreeCB handle_free, gpointer param);
/* Signals an internal error; handles the error in the _next_ loop */
LI_API void li_vrequest_error(liVRequest *vr);
LI_API void li_vrequest_backend_overloaded(liVRequest *vr);
LI_API void li_vrequest_backend_dead(liVRequest *vr);
LI_API void li_vrequest_backend_error(liVRequest *vr, liBackendError berror);
LI_API void li_vrequest_backend_finished(liVRequest *vr); /* action.c */
/* resets fields which weren't reset in favor of keep-alive tracking */
LI_API void li_vrequest_start(liVRequest *vr);
/* received all request headers */
LI_API void li_vrequest_handle_request_headers(liVRequest *vr);
/* received (partial) request content */
LI_API void li_vrequest_handle_request_body(liVRequest *vr);
/* received all response headers/status code - call once from your indirect handler */
LI_API void li_vrequest_handle_response_headers(liVRequest *vr);
/* received (partial) response content - call from your indirect handler */
LI_API void li_vrequest_handle_response_body(liVRequest *vr);
/* response completely ready */
LI_API gboolean li_vrequest_handle_direct(liVRequest *vr);
/* handle request over time */
LI_API gboolean li_vrequest_handle_indirect(liVRequest *vr, liPlugin *p);
LI_API gboolean li_vrequest_is_handled(liVRequest *vr);
LI_API void li_vrequest_state_machine(liVRequest *vr);
LI_API void li_vrequest_joblist_append(liVRequest *vr);
LI_API liJobRef* li_vrequest_get_ref(liVRequest *vr);
LI_API gboolean li_vrequest_redirect(liVRequest *vr, GString *uri);
LI_API gboolean li_vrequest_redirect_directory(liVRequest *vr);
/* updates worker stats too */
LI_API void li_vrequest_update_stats_in(liVRequest *vr, goffset transferred);
LI_API void li_vrequest_update_stats_out(liVRequest *vr, goffset transferred);
#endif