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|
#ifndef HTTP_CLIENT_PRIVATE_H
#define HTTP_CLIENT_PRIVATE_H
#include "connection.h"
#include "http-url.h"
#include "http-client.h"
/*
* Defaults
*/
#define HTTP_CLIENT_CONTINUE_TIMEOUT_MSECS (1000*2)
#define HTTP_CLIENT_DEFAULT_REQUEST_TIMEOUT_MSECS (1000*60*1)
#define HTTP_CLIENT_DEFAULT_DNS_LOOKUP_TIMEOUT_MSECS (1000*10)
#define HTTP_CLIENT_DEFAULT_BACKOFF_TIME_MSECS (100)
#define HTTP_CLIENT_DEFAULT_BACKOFF_MAX_TIME_MSECS (1000*60)
#define HTTP_CLIENT_DEFAULT_DNS_TTL_MSECS (1000*60*30)
#define HTTP_CLIENT_MIN_IDLE_TIMEOUT_MSECS 50
/*
* Types
*/
struct http_client_connection;
struct http_client_peer_pool;
struct http_client_peer_shared;
struct http_client_peer;
struct http_client_queue;
struct http_client_host_shared;
struct http_client_host;
ARRAY_DEFINE_TYPE(http_client_request, struct http_client_request *);
ARRAY_DEFINE_TYPE(http_client_connection, struct http_client_connection *);
ARRAY_DEFINE_TYPE(http_client_peer, struct http_client_peer *);
ARRAY_DEFINE_TYPE(http_client_peer_shared, struct http_client_peer_shared *);
ARRAY_DEFINE_TYPE(http_client_peer_pool, struct http_client_peer_pool *);
ARRAY_DEFINE_TYPE(http_client_queue, struct http_client_queue *);
ARRAY_DEFINE_TYPE(http_client_host, struct http_client_host_shared *);
HASH_TABLE_DEFINE_TYPE(http_client_peer_shared,
const struct http_client_peer_addr *,
struct http_client_peer_shared *);
HASH_TABLE_DEFINE_TYPE(http_client_host_shared, const char *,
struct http_client_host_shared *);
enum http_client_peer_addr_type {
HTTP_CLIENT_PEER_ADDR_HTTP = 0,
HTTP_CLIENT_PEER_ADDR_HTTPS,
HTTP_CLIENT_PEER_ADDR_HTTPS_TUNNEL,
HTTP_CLIENT_PEER_ADDR_RAW,
HTTP_CLIENT_PEER_ADDR_UNIX,
};
struct http_client_peer_addr {
enum http_client_peer_addr_type type;
union {
struct {
const char *https_name; /* TLS SNI */
struct ip_addr ip;
in_port_t port;
} tcp;
struct {
const char *path;
} un;
} a;
};
/*
* Objects
*/
struct http_client_request {
pool_t pool;
unsigned int refcount;
const char *label;
unsigned int id;
struct http_client_request *prev, *next;
const char *method, *target;
struct http_url origin_url;
const char *username, *password;
const char *host_socket;
const struct http_url *host_url;
const char *authority;
struct http_client *client;
struct http_client_host *host;
struct http_client_queue *queue;
struct http_client_peer *peer;
struct http_client_connection *conn;
struct event *event;
const char *const *event_headers;
unsigned int last_status;
string_t *headers;
time_t date;
struct istream *payload_input;
uoff_t payload_size, payload_offset;
struct ostream *payload_output;
/* Time when request can be sent the next time. This is set by
http_client_request_delay*(). Default is 0 = immediately. Retries
can update this. */
struct timeval release_time;
/* Time when http_client_request_submit() was called. */
struct timeval submit_time;
/* Time when the request was first sent to the server. The HTTP
connection already exists at this time. */
struct timeval first_sent_time;
/* Time when the request was last sent to the server (if it was
retried). */
struct timeval sent_time;
/* Time when the HTTP response header was last received. */
struct timeval response_time;
/* Time when the request will be aborted. Set by
http_client_request_set_timeout(). */
struct timeval timeout_time;
unsigned int timeout_msecs;
unsigned int attempt_timeout_msecs;
unsigned int max_attempts;
uoff_t response_offset, request_offset;
uoff_t bytes_in, bytes_out;
unsigned int attempts, send_attempts;
unsigned int redirects;
uint64_t sent_global_ioloop_usecs;
uint64_t sent_http_ioloop_usecs;
uint64_t sent_lock_usecs;
unsigned int delayed_error_status;
const char *delayed_error;
http_client_request_callback_t *callback;
void *context;
void (*destroy_callback)(void *);
void *destroy_context;
enum http_request_state state;
bool have_hdr_authorization:1;
bool have_hdr_body_spec:1;
bool have_hdr_connection:1;
bool have_hdr_date:1;
bool have_hdr_expect:1;
bool have_hdr_host:1;
bool have_hdr_user_agent:1;
bool payload_sync:1;
bool payload_sync_continue:1;
bool payload_chunked:1;
bool payload_wait:1;
bool payload_finished:1;
bool payload_empty:1;
bool urgent:1;
bool submitted:1;
bool listed:1;
bool connect_tunnel:1;
bool connect_direct:1;
bool ssl_tunnel:1;
bool preserve_exact_reason:1;
};
struct http_client_connection {
struct connection conn;
struct event *event;
unsigned int refcount;
struct http_client_peer_pool *ppool;
struct http_client_peer *peer;
int connect_errno;
struct timeval connect_start_timestamp;
struct timeval connected_timestamp;
struct http_client_request *connect_request;
struct ssl_iostream *ssl_iostream;
struct http_response_parser *http_parser;
struct timeout *to_connect, *to_input, *to_idle, *to_response;
struct timeout *to_requests;
struct http_client_request *pending_request;
struct istream *incoming_payload;
struct io *io_req_payload;
struct ioloop *last_ioloop;
struct io_wait_timer *io_wait_timer;
/* Requests that have been sent, waiting for response */
ARRAY_TYPE(http_client_request) request_wait_list;
bool connected:1; /* Connection is connected */
bool idle:1; /* Connection is idle */
bool tunneling:1; /* Last sent request turns this
connection into tunnel */
bool connect_succeeded:1; /* Connection succeeded including SSL */
bool connect_failed:1; /* Connection failed */
bool lost_prematurely:1; /* Lost connection before receiving any data */
bool closing:1;
bool disconnected:1;
bool close_indicated:1;
bool output_locked:1; /* Output is locked; no pipelining */
bool output_broken:1; /* Output is broken; no more requests */
bool in_req_callback:1; /* Performing request callback (busy) */
bool debug:1;
};
struct http_client_peer_shared {
unsigned int refcount;
struct http_client_peer_addr addr;
char *addr_name;
struct event *event;
char *label;
struct http_client_context *cctx;
struct http_client_peer_shared *prev, *next;
struct http_client_peer_pool *pools_list;
struct http_client_peer *peers_list;
unsigned int peers_count;
/* Connection retry */
struct timeval last_failure;
struct timeout *to_backoff;
unsigned int backoff_initial_time_msecs;
unsigned int backoff_current_time_msecs;
unsigned int backoff_max_time_msecs;
bool no_payload_sync:1; /* Expect: 100-continue failed before */
bool seen_100_response:1; /* Expect: 100-continue succeeded before */
bool allows_pipelining:1; /* Peer is known to allow persistent
connections */
};
struct http_client_peer_pool {
unsigned int refcount;
struct http_client_peer_shared *peer;
struct http_client_peer_pool *prev, *next;
struct event *event;
/* All connections to this peer */
ARRAY_TYPE(http_client_connection) conns;
/* Pending connections (not ready connecting) */
ARRAY_TYPE(http_client_connection) pending_conns;
/* Available connections to this peer */
ARRAY_TYPE(http_client_connection) idle_conns;
/* Distinguishing settings for these connections */
struct ssl_iostream_context *ssl_ctx;
char *rawlog_dir;
struct pcap_output *pcap_output;
bool destroyed:1; /* Peer pool is being destroyed */
};
struct http_client_peer {
unsigned int refcount;
struct http_client_peer_shared *shared;
struct http_client_peer *shared_prev, *shared_next;
struct http_client *client;
struct http_client_peer *client_prev, *client_next;
struct http_client_peer_pool *ppool;
struct event *event;
/* Queues using this peer */
ARRAY_TYPE(http_client_queue) queues;
/* Active connections to this peer */
ARRAY_TYPE(http_client_connection) conns;
/* Pending connections (not ready connecting) */
ARRAY_TYPE(http_client_connection) pending_conns;
/* Zero time-out for consolidating request handling */
struct timeout *to_req_handling;
bool connect_failed:1; /* Last connection attempt failed */
bool connect_backoff:1; /* Peer is waiting for backoff timout*/
bool disconnected:1; /* Peer is already disconnected */
bool handling_requests:1; /* Currently running request handler */
};
struct http_client_queue {
struct http_client *client;
struct http_client_queue *prev, *next;
struct http_client_host *host;
char *name;
struct event *event;
struct http_client_peer_addr addr;
char *addr_name;
/* Current index in host->ips */
unsigned int ips_connect_idx;
/* The first IP that started the current round of connection attempts.
initially 0, and later set to the ip index of the last successful
connected IP */
unsigned int ips_connect_start_idx;
struct timeval first_connect_time;
unsigned int connect_attempts;
/* Peers we are trying to connect to;
this can be more than one when soft connect timeouts are enabled */
ARRAY_TYPE(http_client_peer) pending_peers;
/* Currently active peer */
struct http_client_peer *cur_peer;
/* All requests associated to this queue
(ordered by earliest timeout first) */
ARRAY_TYPE(http_client_request) requests;
/* Delayed requests waiting to be released after delay */
ARRAY_TYPE(http_client_request) delayed_requests;
/* Requests pending in queue to be picked up by connections */
ARRAY_TYPE(http_client_request) queued_requests, queued_urgent_requests;
struct timeout *to_connect, *to_request, *to_delayed;
};
struct http_client_host_shared {
struct http_client_host_shared *prev, *next;
struct http_client_context *cctx;
char *name;
struct event *event;
/* The ip addresses DNS returned for this host */
unsigned int ips_count;
struct ip_addr *ips;
struct timeval ips_timeout;
/* Private instance for each client that uses this host */
struct http_client_host *hosts_list;
/* Active DNS lookup */
struct dns_lookup *dns_lookup;
/* Timeouts */
struct timeout *to_idle;
bool destroyed:1; /* Shared host object is being destroyed */
bool unix_local:1;
bool explicit_ip:1;
};
struct http_client_host {
struct http_client_host_shared *shared;
struct http_client_host *shared_prev, *shared_next;
struct http_client *client;
struct http_client_host *client_prev, *client_next;
/* Separate queue for each host port */
ARRAY_TYPE(http_client_queue) queues;
};
struct http_client {
pool_t pool;
struct http_client_context *cctx;
struct http_client_settings set;
struct http_client *prev, *next;
struct event *event;
struct ioloop *ioloop;
struct ssl_iostream_context *ssl_ctx;
/* List of failed requests that are waiting for ioloop */
ARRAY(struct http_client_request *) delayed_failing_requests;
struct timeout *to_failing_requests;
struct http_client_host *hosts_list;
struct http_client_peer *peers_list;
struct http_client_request *requests_list;
unsigned int requests_count;
bool waiting:1;
};
struct http_client_context {
pool_t pool;
unsigned int refcount;
struct event *event;
struct ioloop *ioloop;
struct http_client_settings set;
struct dns_client *dns_client;
const char *dns_client_socket_path;
unsigned int dns_ttl_msecs;
unsigned int dns_lookup_timeout_msecs;
struct http_client *clients_list;
struct connection_list *conn_list;
HASH_TABLE_TYPE(http_client_peer_shared) peers;
struct http_client_peer_shared *peers_list;
HASH_TABLE_TYPE(http_client_host_shared) hosts;
struct http_client_host_shared *unix_host;
struct http_client_host_shared *hosts_list;
};
/*
* Peer address
*/
static inline bool
http_client_peer_addr_is_https(const struct http_client_peer_addr *addr)
{
switch (addr->type) {
case HTTP_CLIENT_PEER_ADDR_HTTPS:
case HTTP_CLIENT_PEER_ADDR_HTTPS_TUNNEL:
return TRUE;
default:
break;
}
return FALSE;
}
static inline const char *
http_client_peer_addr_get_https_name(const struct http_client_peer_addr *addr)
{
switch (addr->type) {
case HTTP_CLIENT_PEER_ADDR_HTTPS:
case HTTP_CLIENT_PEER_ADDR_HTTPS_TUNNEL:
return addr->a.tcp.https_name;
default:
break;
}
return NULL;
}
static inline const char *
http_client_peer_addr2str(const struct http_client_peer_addr *addr)
{
switch (addr->type) {
case HTTP_CLIENT_PEER_ADDR_HTTP:
case HTTP_CLIENT_PEER_ADDR_HTTPS:
case HTTP_CLIENT_PEER_ADDR_HTTPS_TUNNEL:
case HTTP_CLIENT_PEER_ADDR_RAW:
if (addr->a.tcp.ip.family == AF_INET6) {
return t_strdup_printf("[%s]:%u",
net_ip2addr(&addr->a.tcp.ip),
addr->a.tcp.port);
}
return t_strdup_printf("%s:%u",
net_ip2addr(&addr->a.tcp.ip),
addr->a.tcp.port);
case HTTP_CLIENT_PEER_ADDR_UNIX:
return t_strdup_printf("unix:%s", addr->a.un.path);
default:
break;
}
i_unreached();
return "";
}
/*
* Request
*/
static inline bool
http_client_request_to_proxy(const struct http_client_request *req)
{
return (req->host_url != &req->origin_url);
}
const char *http_client_request_label(struct http_client_request *req);
void http_client_request_ref(struct http_client_request *req);
/* Returns FALSE if unrefing destroyed the request entirely */
bool http_client_request_unref(struct http_client_request **_req);
void http_client_request_destroy(struct http_client_request **_req);
void http_client_request_get_peer_addr(const struct http_client_request *req,
struct http_client_peer_addr *addr);
enum http_response_payload_type
http_client_request_get_payload_type(struct http_client_request *req);
int http_client_request_send(struct http_client_request *req, bool pipelined);
int http_client_request_send_more(struct http_client_request *req,
bool pipelined);
bool http_client_request_callback(struct http_client_request *req,
struct http_response *response);
void http_client_request_connect_callback(struct http_client_request *req,
const struct http_client_tunnel *tunnel,
struct http_response *response);
void http_client_request_resubmit(struct http_client_request *req);
void http_client_request_retry(struct http_client_request *req,
unsigned int status, const char *error);
void http_client_request_error_delayed(struct http_client_request **_req);
void http_client_request_error(struct http_client_request **req,
unsigned int status, const char *error);
void http_client_request_redirect(struct http_client_request *req,
unsigned int status, const char *location);
void http_client_request_finish(struct http_client_request *req);
/*
* Connection
*/
struct connection_list *http_client_connection_list_init(void);
struct http_client_connection *
http_client_connection_create(struct http_client_peer *peer);
void http_client_connection_ref(struct http_client_connection *conn);
/* Returns FALSE if unrefing destroyed the connection entirely */
bool http_client_connection_unref(struct http_client_connection **_conn);
void http_client_connection_close(struct http_client_connection **_conn);
void http_client_connection_lost(struct http_client_connection **_conn,
const char *error) ATTR_NULL(2);
void http_client_connection_peer_closed(struct http_client_connection **_conn);
void http_client_connection_request_destroyed(
struct http_client_connection *conn, struct http_client_request *req);
void http_client_connection_handle_output_error(
struct http_client_connection *conn);
int http_client_connection_output(struct http_client_connection *conn);
void http_client_connection_start_request_timeout(
struct http_client_connection *conn);
void http_client_connection_reset_request_timeout(
struct http_client_connection *conn);
void http_client_connection_stop_request_timeout(
struct http_client_connection *conn);
unsigned int
http_client_connection_count_pending(struct http_client_connection *conn);
int http_client_connection_check_ready(struct http_client_connection *conn);
bool http_client_connection_is_idle(struct http_client_connection *conn);
bool http_client_connection_is_active(struct http_client_connection *conn);
int http_client_connection_next_request(struct http_client_connection *conn);
void http_client_connection_check_idle(struct http_client_connection *conn);
void http_client_connection_switch_ioloop(struct http_client_connection *conn);
void http_client_connection_start_tunnel(struct http_client_connection **_conn,
struct http_client_tunnel *tunnel);
void http_client_connection_lost_peer(struct http_client_connection *conn);
void http_client_connection_claim_idle(struct http_client_connection *conn,
struct http_client_peer *peer);
/*
* Peer
*/
/* address */
unsigned int
http_client_peer_addr_hash(const struct http_client_peer_addr *peer) ATTR_PURE;
int http_client_peer_addr_cmp(const struct http_client_peer_addr *peer1,
const struct http_client_peer_addr *peer2)
ATTR_PURE;
/* connection pool */
void http_client_peer_pool_ref(struct http_client_peer_pool *ppool);
void http_client_peer_pool_unref(struct http_client_peer_pool **_ppool);
void http_client_peer_pool_close(struct http_client_peer_pool **_ppool);
/* peer (shared) */
const char *
http_client_peer_shared_label(struct http_client_peer_shared *pshared);
void http_client_peer_shared_ref(struct http_client_peer_shared *pshared);
void http_client_peer_shared_unref(struct http_client_peer_shared **_pshared);
void http_client_peer_shared_close(struct http_client_peer_shared **_pshared);
void http_client_peer_shared_switch_ioloop(
struct http_client_peer_shared *pshared);
unsigned int
http_client_peer_shared_max_connections(
struct http_client_peer_shared *pshared);
/* peer */
struct http_client_peer *
http_client_peer_get(struct http_client *client,
const struct http_client_peer_addr *addr);
void http_client_peer_ref(struct http_client_peer *peer);
bool http_client_peer_unref(struct http_client_peer **_peer);
void http_client_peer_close(struct http_client_peer **_peer);
bool http_client_peer_have_queue(struct http_client_peer *peer,
struct http_client_queue *queue);
void http_client_peer_link_queue(struct http_client_peer *peer,
struct http_client_queue *queue);
void http_client_peer_unlink_queue(struct http_client_peer *peer,
struct http_client_queue *queue);
struct http_client_request *
http_client_peer_claim_request(struct http_client_peer *peer, bool no_urgent);
void http_client_peer_trigger_request_handler(struct http_client_peer *peer);
void http_client_peer_connection_success(struct http_client_peer *peer);
void http_client_peer_connection_failure(struct http_client_peer *peer,
const char *reason);
void http_client_peer_connection_lost(struct http_client_peer *peer,
bool premature);
bool http_client_peer_is_connected(struct http_client_peer *peer);
unsigned int
http_client_peer_idle_connections(struct http_client_peer *peer);
unsigned int
http_client_peer_active_connections(struct http_client_peer *peer);
unsigned int
http_client_peer_pending_connections(struct http_client_peer *peer);
void http_client_peer_switch_ioloop(struct http_client_peer *peer);
/*
* Queue
*/
struct http_client_queue *
http_client_queue_get(struct http_client_host *host,
const struct http_client_peer_addr *addr);
void http_client_queue_free(struct http_client_queue *queue);
void http_client_queue_connection_setup(struct http_client_queue *queue);
unsigned int
http_client_queue_host_lookup_done(struct http_client_queue *queue);
void http_client_queue_host_lookup_failure(struct http_client_queue *queue,
const char *error);
void http_client_queue_submit_request(struct http_client_queue *queue,
struct http_client_request *req);
void http_client_queue_drop_request(struct http_client_queue *queue,
struct http_client_request *req);
struct http_client_request *
http_client_queue_claim_request(struct http_client_queue *queue,
const struct http_client_peer_addr *addr,
bool no_urgent);
unsigned int
http_client_queue_requests_pending(struct http_client_queue *queue,
unsigned int *num_urgent_r) ATTR_NULL(2);
unsigned int http_client_queue_requests_active(struct http_client_queue *queue);
void http_client_queue_connection_success(struct http_client_queue *queue,
struct http_client_peer *peer);
void http_client_queue_connection_failure(struct http_client_queue *queue,
struct http_client_peer *peer,
const char *reason);
void http_client_queue_peer_disconnected(struct http_client_queue *queue,
struct http_client_peer *peer);
void http_client_queue_switch_ioloop(struct http_client_queue *queue);
/*
* Host
*/
/* host (shared) */
void http_client_host_shared_free(struct http_client_host_shared **_hshared);
void http_client_host_shared_switch_ioloop(
struct http_client_host_shared *hshared);
/* host */
static inline unsigned int
http_client_host_get_ips_count(struct http_client_host *host)
{
return host->shared->ips_count;
}
static inline const struct ip_addr *
http_client_host_get_ip(struct http_client_host *host, unsigned int idx)
{
i_assert(idx < host->shared->ips_count);
return &host->shared->ips[idx];
}
static inline bool
http_client_host_ready(struct http_client_host *host)
{
return host->shared->dns_lookup == NULL;
}
struct http_client_host *
http_client_host_get(struct http_client *client,
const struct http_url *host_url);
void http_client_host_free(struct http_client_host **_host);
void http_client_host_submit_request(struct http_client_host *host,
struct http_client_request *req);
void http_client_host_switch_ioloop(struct http_client_host *host);
void http_client_host_check_idle(struct http_client_host *host);
int http_client_host_refresh(struct http_client_host *host);
bool http_client_host_get_ip_idx(struct http_client_host *host,
const struct ip_addr *ip, unsigned int *idx_r);
/*
* Client
*/
int http_client_init_ssl_ctx(struct http_client *client, const char **error_r);
void http_client_delay_request_error(struct http_client *client,
struct http_client_request *req);
void http_client_remove_request_error(struct http_client *client,
struct http_client_request *req);
/*
* Client shared context
*/
void http_client_context_switch_ioloop(struct http_client_context *cctx);
#endif
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