kc3-lang/libevent/http-internal.h

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• Hash : ba7262eb
  Author :
  Date : 2006-07-17T00:33:57
  

  reorganization of the http functionality; we separate http handling into a
  connection object and a request object; also make it clear which buffers are
  used for input and output; unittests not complete yet.
  
  
  svn:r217
  

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• http-internal.h

• /*
   * Copyright 2001 Niels Provos <provos@citi.umich.edu>
   * All rights reserved.
   *
   * This header file contains definitions for dealing with HTTP requests
   * that are internal to libevent.  As user of the library, you should not
   * need to know about these.
   */
  
  #ifndef _HTTP_H_
  #define _HTTP_H_
  
  #define HTTP_CONNECT_TIMEOUT	45
  #define HTTP_WRITE_TIMEOUT	50
  #define HTTP_READ_TIMEOUT	50
  
  #define HTTP_PREFIX		"http://"
  #define HTTP_DEFAULTPORT	80
  
  struct evbuffer;
  struct addrinfo;
  struct evhttp_request;
  
  /* A stupid connection object - maybe make this a bufferevent later */
  
  enum evhttp_connection_state {
  	EVCON_DISCONNECTED,	/* not currently connected not trying either */
  	EVCON_CONNECTING,	/* tries to currently connect */
  	EVCON_CONNECTED		/* connection is established */
  };
  
  struct evhttp_connection {
  	int fd;
  	struct event ev;
  	struct evbuffer *input_buffer;
  	struct evbuffer *output_buffer;
  	
  	char *address;
  	u_short port;
  
  	int flags;
  #define EVHTTP_CON_INCOMING	0x0001	/* only one request on it ever */
  #define EVHTTP_CON_OUTGOING	0x0002  /* multiple requests possible */
  	
  	enum evhttp_connection_state state;
  
  	TAILQ_HEAD(evcon_requestq, evhttp_request) requests;
  	
  	void (*cb)(struct evhttp_connection *, void *);
  	void *cb_arg;
  };
  
  enum evhttp_request_kind { EVHTTP_REQUEST, EVHTTP_RESPONSE };
  
  struct evhttp_request {
  	TAILQ_ENTRY(evhttp_request) next;
  
  	/* the connection object that this request belongs to */
  	struct evhttp_connection *evcon;
  	int flags;
  #define EVHTTP_REQ_OWN_CONNECTION	0x0001	
  	
  	struct evkeyvalq *input_headers;
  	struct evkeyvalq *output_headers;
  
  	/* xxx: do we still need these? */
  	char *remote_host;
  	u_short remote_port;
  
  	enum evhttp_request_kind kind;
  	enum evhttp_cmd_type type;
  
  	char *uri;			/* uri after HTTP request was parsed */
  
  	char major;			/* HTTP Major number */
  	char minor;			/* HTTP Minor number */
  	
  	int got_firstline;
  	int response_code;		/* HTTP Response code */
  	char *response_code_line;	/* Readable response */
  
  	struct evbuffer *input_buffer;	/* read data */
  	int ntoread;
  
  	struct evbuffer *output_buffer;	/* outgoing post or data */
  
  	/* Callback */
  	void (*cb)(struct evhttp_request *, void *);
  	void *cb_arg;
  };
  
  struct evhttp_cb {
  	TAILQ_ENTRY(evhttp_cb) next;
  
  	char *what;
  
  	void (*cb)(struct evhttp_request *req, void *);
  	void *cbarg;
  };
  
  struct evhttp {
  	struct event bind_ev;
  
  	TAILQ_HEAD(httpcbq, evhttp_cb) callbacks;
  
  	void (*gencb)(struct evhttp_request *req, void *);
  	void *gencbarg;
  };
  
  /* resets the connection; can be reused for more requests */
  void evhttp_connection_reset(struct evhttp_connection *);
  
  /* connects if necessary */
  int evhttp_connection_connect(struct evhttp_connection *);
  
  /* notifies the current request that it failed; resets connection */
  void evhttp_connection_fail(struct evhttp_connection *);
  
  void evhttp_get_request(int, struct sockaddr *, socklen_t,
      void (*)(struct evhttp_request *, void *), void *);
  
  int evhttp_hostportfile(char *, char **, u_short *, char **);
  
  int evhttp_parse_lines(struct evhttp_request *, struct evbuffer*);
  
  void evhttp_start_read(struct evhttp_connection *);
  void evhttp_read_header(int, short, void *);
  void evhttp_make_header(struct evhttp_connection *, struct evhttp_request *);
  
  void evhttp_write_buffer(struct evhttp_connection *,
      void (*)(struct evhttp_connection *, void *), void *);
  
  /* response sending HTML the data in the buffer */
  void evhttp_response_code(struct evhttp_request *, int, const char *);
  void evhttp_send_page(struct evhttp_request *, struct evbuffer *);
  
  #endif /* _HTTP_H */
  

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