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- /*-
- * Copyright 2016 Vsevolod Stakhov
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #ifndef HTTP_H_
- #define HTTP_H_
-
- /**
- * @file http.h
- *
- * This is an interface for HTTP client and conn. This code uses HTTP parser written
- * by Joyent Inc based on nginx code.
- */
-
- #include "config.h"
- #include "http_parser.h"
- #include "keypairs_cache.h"
- #include "fstring.h"
-
- enum rspamd_http_connection_type {
- RSPAMD_HTTP_SERVER,
- RSPAMD_HTTP_CLIENT
- };
-
- /**
- * HTTP header structure
- */
- struct rspamd_http_header {
- rspamd_ftok_t *name;
- rspamd_ftok_t *value;
- rspamd_fstring_t *combined;
- struct rspamd_http_header *next, *prev;
- };
-
- /**
- * Legacy spamc protocol
- */
- #define RSPAMD_HTTP_FLAG_SPAMC 1 << 1
-
- /**
- * HTTP message structure, used for requests and replies
- */
- struct rspamd_http_message {
- rspamd_fstring_t *url;
- rspamd_fstring_t *host;
- unsigned port;
- rspamd_fstring_t *status;
- struct rspamd_http_header *headers;
- rspamd_fstring_t *body;
- rspamd_ftok_t body_buf;
- gpointer peer_key;
- enum http_parser_type type;
- time_t date;
- gint code;
- enum http_method method;
- gint flags;
- };
-
-
- /**
- * Options for HTTP connection
- */
- enum rspamd_http_options {
- RSPAMD_HTTP_BODY_PARTIAL = 0x1, /**< Call body handler on all body data portions */
- RSPAMD_HTTP_CLIENT_SIMPLE = 0x2, /**< Read HTTP client reply automatically */
- RSPAMD_HTTP_CLIENT_ENCRYPTED = 0x4 /**< Encrypt data for client */
- };
-
- struct rspamd_http_connection_private;
- struct rspamd_http_connection;
- struct rspamd_http_connection_router;
- struct rspamd_http_connection_entry;
-
- typedef int (*rspamd_http_body_handler_t) (struct rspamd_http_connection *conn,
- struct rspamd_http_message *msg,
- const gchar *chunk,
- gsize len);
-
- typedef void (*rspamd_http_error_handler_t) (struct rspamd_http_connection *conn,
- GError *err);
-
- typedef int (*rspamd_http_finish_handler_t) (struct rspamd_http_connection *conn,
- struct rspamd_http_message *msg);
-
- typedef int (*rspamd_http_router_handler_t) (struct rspamd_http_connection_entry
- *conn_ent,
- struct rspamd_http_message *msg);
- typedef void (*rspamd_http_router_error_handler_t) (struct
- rspamd_http_connection_entry *conn_ent,
- GError *err);
- typedef void (*rspamd_http_router_finish_handler_t) (struct
- rspamd_http_connection_entry *conn_ent);
-
- /**
- * HTTP connection structure
- */
- struct rspamd_http_connection {
- struct rspamd_http_connection_private *priv;
- rspamd_http_body_handler_t body_handler;
- rspamd_http_error_handler_t error_handler;
- rspamd_http_finish_handler_t finish_handler;
- struct rspamd_keypair_cache *cache;
- gpointer ud;
- unsigned opts;
- enum rspamd_http_connection_type type;
- gboolean finished;
- gint fd;
- gint ref;
- };
-
- struct rspamd_http_connection_entry {
- struct rspamd_http_connection_router *rt;
- struct rspamd_http_connection *conn;
- gpointer ud;
- gboolean is_reply;
- struct rspamd_http_connection_entry *prev, *next;
- };
-
- struct rspamd_http_connection_router {
- struct rspamd_http_connection_entry *conns;
- GHashTable *paths;
- struct timeval tv;
- struct timeval *ptv;
- struct event_base *ev_base;
- struct rspamd_keypair_cache *cache;
- gchar *default_fs_path;
- gpointer key;
- rspamd_http_router_error_handler_t error_handler;
- rspamd_http_router_finish_handler_t finish_handler;
- };
-
- /**
- * Create new http connection
- * @param handler_t handler_t for body
- * @param opts options
- * @return new connection structure
- */
- struct rspamd_http_connection * rspamd_http_connection_new (
- rspamd_http_body_handler_t body_handler,
- rspamd_http_error_handler_t error_handler,
- rspamd_http_finish_handler_t finish_handler,
- unsigned opts,
- enum rspamd_http_connection_type type,
- struct rspamd_keypair_cache *cache);
-
- /**
- * Load the encryption keypair
- * @param key base32 encoded privkey and pubkey (in that order)
- * @param keylen length of base32 string
- * @return opaque pointer pr NULL in case of error
- */
- gpointer rspamd_http_connection_make_key (gchar *key, gsize keylen);
-
- /**
- * Generate the encryption keypair
- * @return opaque pointer pr NULL in case of error
- */
- gpointer rspamd_http_connection_gen_key (void);
-
- /**
- * Set key pointed by an opaque pointer
- * @param conn connection structure
- * @param key opaque key structure
- */
- void rspamd_http_connection_set_key (struct rspamd_http_connection *conn,
- gpointer key);
-
- /**
- * Returns TRUE if a connection is encrypted
- * @param conn
- * @return
- */
- gboolean rspamd_http_connection_is_encrypted (struct rspamd_http_connection *conn);
-
- /** Print pubkey */
- #define RSPAMD_KEYPAIR_PUBKEY 0x1
- /** Print secret key */
- #define RSPAMD_KEYPAIR_PRIVKEY 0x2
- /** Print key id */
- #define RSPAMD_KEYPAIR_ID 0x4
- /** Encode output with base 32 */
- #define RSPAMD_KEYPAIR_BASE32 0x8
- /** Human readable output */
- #define RSPAMD_KEYPAIR_HUMAN 0x10
- #define RSPAMD_KEYPAIR_HEX 0x20
- /**
- * Print keypair encoding it if needed
- * @param key key to print
- * @param how flags that specifies printing behaviour
- * @return newly allocated string with keypair
- */
- GString *rspamd_http_connection_print_key (gpointer key, guint how);
-
- /**
- * Release key pointed by an opaque pointer
- * @param key opaque key structure
- */
- void rspamd_http_connection_key_unref (gpointer key);
-
- /**
- * Increase refcount for a key pointed by an opaque pointer
- * @param key opaque key structure
- */
- gpointer rspamd_http_connection_key_ref (gpointer key);
-
- gpointer rspamd_http_connection_make_peer_key (const gchar *key);
-
- /**
- * Handle a request using socket fd and user data ud
- * @param conn connection structure
- * @param ud opaque user data
- * @param fd fd to read/write
- */
- void rspamd_http_connection_read_message (
- struct rspamd_http_connection *conn,
- gpointer ud,
- gint fd,
- struct timeval *timeout,
- struct event_base *base);
-
- /**
- * Send reply using initialised connection
- * @param conn connection structure
- * @param msg HTTP message
- * @param ud opaque user data
- * @param fd fd to read/write
- */
- void rspamd_http_connection_write_message (
- struct rspamd_http_connection *conn,
- struct rspamd_http_message *msg,
- const gchar *host,
- const gchar *mime_type,
- gpointer ud,
- gint fd,
- struct timeval *timeout,
- struct event_base *base);
-
- /**
- * Free connection structure
- * @param conn
- */
- void rspamd_http_connection_free (struct rspamd_http_connection *conn);
-
- /**
- * Increase refcount for a connection
- * @param conn
- * @return
- */
- static inline struct rspamd_http_connection *
- rspamd_http_connection_ref (struct rspamd_http_connection *conn)
- {
- conn->ref++;
- return conn;
- }
-
- /**
- * Decrease a refcount for a connection and free it if refcount is equal to zero
- * @param conn
- */
- static void
- rspamd_http_connection_unref (struct rspamd_http_connection *conn)
- {
- if (--conn->ref <= 0) {
- rspamd_http_connection_free (conn);
- }
- }
-
- /**
- * Reset connection for a new request
- * @param conn
- */
- void rspamd_http_connection_reset (struct rspamd_http_connection *conn);
-
- /**
- * Extract the current message from a connection to deal with separately
- * @param conn
- * @return
- */
- struct rspamd_http_message * rspamd_http_connection_steal_msg (
- struct rspamd_http_connection *conn);
-
- /**
- * Create new HTTP message
- * @param type request or response
- * @return new http message
- */
- struct rspamd_http_message * rspamd_http_new_message (enum http_parser_type type);
-
- /**
- * Create HTTP message from URL
- * @param url
- * @return new message or NULL
- */
- struct rspamd_http_message* rspamd_http_message_from_url (const gchar *url);
-
- /**
- * Append a header to reply
- * @param rep
- * @param name
- * @param value
- */
- void rspamd_http_message_add_header (struct rspamd_http_message *msg,
- const gchar *name,
- const gchar *value);
-
- /**
- * Search for a specified header in message
- * @param msg message
- * @param name name of header
- */
- const rspamd_ftok_t * rspamd_http_message_find_header (
- struct rspamd_http_message *msg,
- const gchar *name);
-
- /**
- * Remove specific header from a message
- * @param msg
- * @param name
- * @return
- */
- gboolean rspamd_http_message_remove_header (struct rspamd_http_message *msg,
- const gchar *name);
-
- /**
- * Free HTTP message
- * @param msg
- */
- void rspamd_http_message_free (struct rspamd_http_message *msg);
-
- /**
- * Parse HTTP date header and return it as time_t
- * @param header HTTP date header
- * @param len length of header
- * @return time_t or (time_t)-1 in case of error
- */
- time_t rspamd_http_parse_date (const gchar *header, gsize len);
-
- /**
- * Create new http connection router and the associated HTTP connection
- * @param eh error handler callback
- * @param fh finish handler callback
- * @param default_fs_path if not NULL try to serve static files from
- * the specified directory
- * @return
- */
- struct rspamd_http_connection_router * rspamd_http_router_new (
- rspamd_http_router_error_handler_t eh,
- rspamd_http_router_finish_handler_t fh,
- struct timeval *timeout,
- struct event_base *base,
- const char *default_fs_path,
- struct rspamd_keypair_cache *cache);
-
- /**
- * Set encryption key for the HTTP router
- * @param router router structure
- * @param key opaque key structure
- */
- void rspamd_http_router_set_key (struct rspamd_http_connection_router *router,
- gpointer key);
-
- /**
- * Add new path to the router
- */
- void rspamd_http_router_add_path (struct rspamd_http_connection_router *router,
- const gchar *path, rspamd_http_router_handler_t handler);
-
- /**
- * Handle new accepted socket
- * @param router router object
- * @param fd server socket
- * @param ud opaque userdata
- */
- void rspamd_http_router_handle_socket (
- struct rspamd_http_connection_router *router,
- gint fd,
- gpointer ud);
-
- /**
- * Free router and all connections associated
- * @param router
- */
- void rspamd_http_router_free (struct rspamd_http_connection_router *router);
-
- /**
- * Extract arguments from a messsage's URI contained inside query string decoding
- * them if needed
- * @param msg HTTP request message
- * @return new GHashTable which maps rspamd_ftok_t* to rspamd_ftok_t*
- * (table must be freed by a caller)
- */
- GHashTable* rspamd_http_message_parse_query (struct rspamd_http_message *msg);
-
- #endif /* HTTP_H_ */
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