/*****************************************************************************
                                 abyss.h
******************************************************************************

  This file is the interface header for the Abyss HTTP server component of
  XML-RPC For C/C++ (Xmlrpc-c).

  The Abyss component of Xmlrpc-c is based on the independently developed
  and distributed Abyss web server package from 2001.

  Copyright information is at the end of the file.
****************************************************************************/

#ifndef XMLRPC_ABYSS_H_INCLUDED
#define XMLRPC_ABYSS_H_INCLUDED


#ifdef __cplusplus
extern "C" {
#endif

#include <sys/types.h>

#include <xmlrpc-c/inttypes.h>

/****************************************************************************
  STUFF FOR THE OUTER CONTROL PROGRAM TO USE
****************************************************************************/

typedef int abyss_bool;

/****************************************************************************
  GLOBAL (STATIC) PROGRAM STUFF
****************************************************************************/

void
AbyssInit(const char ** const errorP);

void
AbyssTerm(void);

/*********************************************************************
** MIMEType
*********************************************************************/

typedef struct MIMEType MIMEType;

MIMEType *
MIMETypeCreate(void);

void
MIMETypeDestroy(MIMEType * const MIMETypeP);

void
MIMETypeInit(void);

void
MIMETypeTerm(void);

abyss_bool
MIMETypeAdd2(MIMEType *   const MIMETypeP,
             const char * const type,
             const char * const ext);

abyss_bool
MIMETypeAdd(const char * const type,
            const char * const ext);


enum abyss_foreback {ABYSS_FOREGROUND, ABYSS_BACKGROUND};

#define HAVE_CHANSWITCH

typedef struct _TChanSwitch TChanSwitch;
typedef struct _TChannel TChannel;
typedef struct _TSocket TSocket;

#ifdef WIN32
  #include <xmlrpc-c/abyss_winsock.h>
#else
  #include <xmlrpc-c/abyss_unixsock.h>
#endif

void
ChanSwitchInit(const char ** const errorP);

void
ChanSwitchTerm(void);

/* If you're wondering where the constructors for TChanSwitch,
   TChannel, and TSocket are: They're implementation-specific, so look
   in abyss_unixsock.h, etc.
*/

void
ChanSwitchDestroy(TChanSwitch * const chanSwitchP);

void
ChannelInit(const char ** const errorP);

void
ChannelTerm(void);

void
ChannelDestroy(TChannel * const channelP);

void
SocketDestroy(TSocket * const socketP);


typedef struct {
    /* Before Xmlrpc-c 1.04, the internal server representation,
       struct _TServer, was exposed to users and was the only way to
       set certain parameters of the server.  Now, use the (new)
       ServerSet...() functions.  Use the HAVE_ macros to determine
       which method you have to use.
    */
    struct _TServer * srvP;
} TServer;

typedef struct _TSession TSession;

abyss_bool
ServerCreate(TServer *       const serverP,
             const char *    const name,
             xmlrpc_uint16_t const port,
             const char *    const filespath,
             const char *    const logfilename);

void
ServerCreateSwitch(TServer *     const serverP,
                   TChanSwitch * const chanSwitchP,
                   const char ** const errorP);

abyss_bool
ServerCreateSocket(TServer *    const serverP,
                   const char * const name,
                   TOsSocket    const socketFd,
                   const char * const filespath,
                   const char * const logfilename);

#define HAVE_SERVER_CREATE_SOCKET_2
void
ServerCreateSocket2(TServer *     const serverP,
                    TSocket *     const socketP,
                    const char ** const errorP);

abyss_bool
ServerCreateNoAccept(TServer *    const serverP,
                     const char * const name,
                     const char * const filespath,
                     const char * const logfilename);

void
ServerFree(TServer * const serverP);

void
ServerSetName(TServer *    const serverP,
              const char * const name);

void
ServerSetFilesPath(TServer *    const serverP,
                   const char * const filesPath);

void
ServerSetLogFileName(TServer *    const serverP,
                     const char * const logFileName);

#define HAVE_SERVER_SET_KEEPALIVE_TIMEOUT 1
void
ServerSetKeepaliveTimeout(TServer *       const serverP,
                          xmlrpc_uint32_t const keepaliveTimeout);

#define HAVE_SERVER_SET_KEEPALIVE_MAX_CONN 1
void
ServerSetKeepaliveMaxConn(TServer *       const serverP,
                          xmlrpc_uint32_t const keepaliveMaxConn);

#define HAVE_SERVER_SET_TIMEOUT 1
void
ServerSetTimeout(TServer *       const serverP,
                 xmlrpc_uint32_t const timeout);

#define HAVE_SERVER_SET_ADVERTISE 1
void
ServerSetAdvertise(TServer *  const serverP,
                   abyss_bool const advertise);

#define HAVE_SERVER_SET_MIME_TYPE 1
void
ServerSetMimeType(TServer *  const serverP,
                  MIMEType * const MIMETypeP);

void
ServerInit(TServer * const serverP);

void
ServerRun(TServer * const serverP);

void
ServerRunOnce(TServer * const serverP);

/* ServerRunOnce2() is obsolete.  See user's guide. */
void
ServerRunOnce2(TServer *           const serverP,
               enum abyss_foreback const foregroundBackground);

void
ServerRunChannel(TServer *     const serverP,
                 TChannel *    const channelP,
                 void *        const channelInfoP,
                 const char ** const errorP);

#define HAVE_SERVER_RUN_CONN_2
void
ServerRunConn2(TServer *     const serverP,
               TSocket *     const connectedSocketP,
               const char ** const errorP);

void
ServerRunConn(TServer * const serverP,
              TOsSocket const connectedSocket);

void
ServerDaemonize(TServer * const serverP);

void
ServerTerminate(TServer * const serverP);

void
ServerResetTerminate(TServer * const serverP);

void
ServerUseSigchld(TServer * const serverP);

#ifndef WIN32
void
ServerHandleSigchld(pid_t const pid);
#endif

typedef abyss_bool (*URIHandler) (TSession *); /* deprecated */

struct URIHandler2;

typedef void (*initHandlerFn)(struct URIHandler2 *, abyss_bool *);

typedef void (*termHandlerFn)(void *);

typedef void (*handleReq3Fn)(void *,
                             TSession *,
                             abyss_bool *);

typedef void (*handleReq2Fn)(struct URIHandler2 *,
                             TSession *,
                             abyss_bool *);

struct ServerReqHandler3 {
    termHandlerFn term;
    handleReq3Fn  handleReq;
    void *        userdata;
    size_t        handleReqStackSize; /* zero = default */
};

void
ServerAddHandler3(TServer *                        const serverP,
                  const struct ServerReqHandler3 * const handlerP,
                  abyss_bool *                     const successP);

typedef struct URIHandler2 {
    initHandlerFn init;
    termHandlerFn term;
    handleReq2Fn  handleReq2;
    URIHandler    handleReq1;  /* deprecated */
    void *        userdata;
} URIHandler2;

void
ServerAddHandler2(TServer *     const srvP,
                  URIHandler2 * const handlerP,
                  abyss_bool *  const successP);

abyss_bool
ServerAddHandler(TServer * const srvP,
                 URIHandler const handler);

typedef abyss_bool (*THandlerDflt) (TSession *);

/* Note: 'handler' used to be URIHandler;  THandlerDflt is a newer name
   for the same type
*/

void
ServerDefaultHandler(TServer *    const srvP,
                     THandlerDflt const handler);

/* ConfReadServerFile() is inappropriately named; it was a mistake.
   But then, so is having this function at all.  The config file is
   inappropriate for an API.
*/

abyss_bool
ConfReadServerFile(const char * const filename,
                   TServer *    const srvP);

void
LogWrite(TServer *    const srvP,
         const char * const c);

/****************************************************************************
  STUFF FOR HTTP REQUEST HANDLERS TO USE
****************************************************************************/

typedef enum {
    m_unknown, m_get, m_put, m_head, m_post, m_delete, m_trace, m_options
} TMethod;

typedef struct {
    TMethod method;
    const char * uri;
        /* This is NOT the URI.  It is the pathname part of the URI.
           We really should fix that and put the pathname in another
           member.  If the URI does not contain a pathname, this is "*".
        */
    const char * query;
        /* The query part of the URI (stuff after '?').  NULL if none. */
    const char * host;
        /* NOT the value of the host: header.  Rather, the name of the
           target host (could be part of the host: value; could be from the
           URI).  No port number.  NULL if request does not specify a host
           name.
        */
    const char * from;
    const char * useragent;
    const char * referer;
    const char * requestline;
    const char * user;
        /* Requesting user (from authorization: header).  NULL if
           request doesn't specify or handler has not authenticated it.
        */
    xmlrpc_uint16_t port;
        /* The port number from the URI, or default 80 if the URI doesn't
           specify a port.
        */
    abyss_bool keepalive;
} TRequestInfo;

abyss_bool
SessionRefillBuffer(TSession * const sessionP);

size_t
SessionReadDataAvail(TSession * const sessionP);

void
SessionGetReadData(TSession *    const sessionP, 
                   size_t        const max, 
                   const char ** const outStartP, 
                   size_t *      const outLenP);

void
SessionGetRequestInfo(TSession *            const sessionP,
                      const TRequestInfo ** const requestInfoPP);

void
SessionGetChannelInfo(TSession * const sessionP,
                      void **    const channelInfoPP);

void *
SessionGetDefaultHandlerCtx(TSession * const sessionP);

char *
RequestHeaderValue(TSession *   const sessionP,
                   const char * const name);

abyss_bool
ResponseAddField(TSession *   const sessionP,
                 const char * const name,
                 const char * const value);

void
ResponseWriteStart(TSession * const sessionP);

/* For backward compatibility: */
#define ResponseWrite ResponseWriteStart

abyss_bool
ResponseWriteBody(TSession *      const sessionP,
                  const char *    const data,
                  xmlrpc_uint32_t const len);

abyss_bool
ResponseWriteEnd(TSession * const sessionP);

abyss_bool
ResponseChunked(TSession * const sessionP);

xmlrpc_uint16_t
ResponseStatusFromErrno(int const errnoArg);

void
ResponseStatus(TSession *      const sessionP,
               xmlrpc_uint16_t const code);

void
ResponseStatusErrno(TSession * const sessionP);

abyss_bool
ResponseContentType(TSession *   const serverP,
                    const char * const type);

abyss_bool
ResponseContentLength(TSession *      const sessionP,
                      xmlrpc_uint64_t const len);

void
ResponseError2(TSession *   const sessionP,
               const char * const explanation);

void
ResponseError(TSession * const sessionP);

const char *
MIMETypeFromExt(const char * const ext);

const char *
MIMETypeFromExt2(MIMEType *   const MIMETypeP,
                 const char * const ext);

const char *
MIMETypeFromFileName2(MIMEType *   const MIMETypeP,
                      const char * const fileName);

const char *
MIMETypeFromFileName(const char * const fileName);

const char *
MIMETypeGuessFromFile2(MIMEType *   const MIMETypeP,
                       const char * const fileName);

const char *
MIMETypeGuessFromFile(const char * const filename);


/****************************************************************************
  STUFF THAT PROBABLY DOESN'T BELONG IN THIS FILE BECAUSE IT IS INTERNAL

  Some day, we sort this out.
****************************************************************************/


#define CR      '\r'
#define LF      '\n'
#define CRLF    "\r\n"

/*********************************************************************
** Paths and so on...
*********************************************************************/

#ifdef WIN32
#define DEFAULT_ROOT        "c:\\abyss"
#define DEFAULT_DOCS        DEFAULT_ROOT"\\htdocs"
#define DEFAULT_CONF_FILE   DEFAULT_ROOT"\\conf\\abyss.conf"
#define DEFAULT_LOG_FILE    DEFAULT_ROOT"\\log\\abyss.log"
#else
#ifdef __rtems__
#define DEFAULT_ROOT        "/abyss"
#else
#define DEFAULT_ROOT        "/usr/local/abyss"
#endif
#define DEFAULT_DOCS        DEFAULT_ROOT"/htdocs"
#define DEFAULT_CONF_FILE   DEFAULT_ROOT"/conf/abyss.conf"
#define DEFAULT_LOG_FILE    DEFAULT_ROOT"/log/abyss.log"
#endif

/*********************************************************************
** Maximum number of simultaneous connections
*********************************************************************/

#define MAX_CONN    16

/*********************************************************************
** General purpose definitions
*********************************************************************/

#ifndef NULL
#define NULL ((void *)0)
#endif  /* NULL */

#ifndef TRUE
#define TRUE    1
#endif  /* TRUE */

#ifndef FALSE
#define FALSE    0
#endif  /* FALSE */

/*********************************************************************
** Range
*********************************************************************/

abyss_bool
RangeDecode(char *            const str,
            xmlrpc_uint64_t   const filesize,
            xmlrpc_uint64_t * const start,
            xmlrpc_uint64_t * const end);

abyss_bool DateInit(void);

/*********************************************************************
** Base64
*********************************************************************/

void
Base64Encode(const char * const chars,
             char *       const base64);

/*********************************************************************
** Session
*********************************************************************/

abyss_bool SessionLog(TSession * const s);


#ifdef __cplusplus
}


#endif

/*****************************************************************************
** Here is the copyright notice from the Abyss web server project file from
** which this file is derived.
**
** Copyright (C) 2000 by Moez Mahfoudh <mmoez@bigfoot.com>.
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
**    derived from this software without specific prior written permission.
** 
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE.
**
******************************************************************************/
#endif  /* _ABYSS_H_ */
