304 lines
8.8 KiB
C
304 lines
8.8 KiB
C
/*
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* $Id: query_parser.c 53 2011-05-09 16:55:39Z kaori $
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*
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* Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2011, Professor Benoit Macq
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* Copyright (c) 2010-2011, Kaori Hagihara
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef _WIN32
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#include <windows.h>
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#define strcasecmp _stricmp
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#else
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#include <strings.h>
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#endif
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#include <stdio.h>
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#include <string.h>
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#include "query_parser.h"
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#ifdef SERVER
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#include "fcgi_stdio.h"
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#define logstream FCGI_stdout
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#else
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#define FCGI_stdout stdout
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#define FCGI_stderr stderr
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#define logstream stderr
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#endif //SERVER
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/**
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* initialize query parameters
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*
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* @param[in,out] query_param query parameters
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*/
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void init_queryparam( query_param_t *query_param);
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/*
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* get a pair of field name and value from the string starting fieldname=fieldval&... format
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*
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* @param[in] stringptr pointer to the beginning of the parsing string
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* @param[out] fieldname string to copy the field name, if not found, NULL
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* @param[out] fieldval string to copy the field value, if not found, NULL
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* @return pointer to the next field string, if there is none, NULL
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*/
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char * get_fieldparam( char *stringptr, char *fieldname, char *fieldval);
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/**
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* parse string to string array
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*
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* @param[in] src src string
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* @param[out] cclose parsed string array
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*/
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void str2cclose( char *src, char cclose[][MAX_LENOFCID]);
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void parse_metareq( char *field, query_param_t *query_param);
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//! maximum length of field name
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#define MAX_LENOFFIELDNAME 10
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//! maximum length of field value
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#define MAX_LENOFFIELDVAL 128
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void parse_query( char *query_string, query_param_t *query_param)
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{
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char *pquery, fieldname[MAX_LENOFFIELDNAME], fieldval[MAX_LENOFFIELDVAL];
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init_queryparam( query_param);
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pquery = query_string;
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while( pquery!=NULL) {
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pquery = get_fieldparam( pquery, fieldname, fieldval);
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if( fieldname[0] != '\0'){
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if( strcasecmp( fieldname, "target") == 0)
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strcpy( query_param->target,fieldval);
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else if( strcasecmp( fieldname, "tid") == 0)
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strcpy( query_param->tid, fieldval);
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else if( strcasecmp( fieldname, "fsiz") == 0)
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sscanf( fieldval, "%d,%d", &query_param->fx, &query_param->fy);
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else if( strcasecmp( fieldname, "roff") == 0)
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sscanf( fieldval, "%d,%d", &query_param->rx, &query_param->ry);
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else if( strcasecmp( fieldname, "rsiz") == 0)
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sscanf( fieldval, "%d,%d", &query_param->rw, &query_param->rh);
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else if( strcasecmp( fieldname, "cid") == 0)
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strcpy( query_param->cid, fieldval);
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else if( strcasecmp( fieldname, "cnew") == 0)
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query_param->cnew = true;
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else if( strcasecmp( fieldname, "cclose") == 0)
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str2cclose( fieldval, query_param->cclose);
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else if( strcasecmp( fieldname, "metareq") == 0)
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parse_metareq( fieldval, query_param);
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}
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}
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}
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void init_queryparam( query_param_t *query_param)
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{
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int i;
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query_param->target[0]='\0';
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query_param->tid[0]='\0';
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query_param->fx=-1;
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query_param->fy=-1;
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query_param->rx=-1;
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query_param->ry=-1;
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query_param->rw=-1;
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query_param->rh=-1;
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query_param->cid[0]='\0';
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query_param->cnew=false;
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memset( query_param->cclose, 0, MAX_NUMOFCCLOSE*MAX_LENOFCID);
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memset( query_param->box_type, 0, MAX_NUMOFBOX*4);
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memset( query_param->limit, 0, MAX_NUMOFBOX*sizeof(int));
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for( i=0; i<MAX_NUMOFBOX; i++){
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query_param->w[i] = false;
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query_param->s[i] = false;
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query_param->g[i] = false;
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query_param->a[i] = false;
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query_param->priority[i] = false;
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}
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query_param->root_bin = 0;
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query_param->max_depth = -1;
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query_param->metadata_only = false;
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}
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char * get_fieldparam( char *stringptr, char *fieldname, char *fieldval)
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{
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char *eqp, *andp, *nexfieldptr;
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if((eqp = strchr( stringptr, '='))==NULL){
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fprintf( stderr, "= not found\n");
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strcpy( fieldname, "");
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strcpy( fieldval, "");
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return NULL;
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}
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if((andp = strchr( stringptr, '&'))==NULL){
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andp = strchr( stringptr, '\0');
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nexfieldptr = NULL;
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}
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else
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nexfieldptr = andp+1;
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strncpy( fieldname, stringptr, eqp-stringptr);
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fieldname[eqp-stringptr]='\0';
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strncpy( fieldval, eqp+1, andp-eqp-1);
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fieldval[andp-eqp-1]='\0';
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return nexfieldptr;
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}
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void print_queryparam( query_param_t query_param)
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{
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int i;
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fprintf( logstream, "query parameters:\n");
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fprintf( logstream, "\t target: %s\n", query_param.target);
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fprintf( logstream, "\t tid: %s\n", query_param.tid);
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fprintf( logstream, "\t fx,fy: %d, %d\n", query_param.fx, query_param.fy);
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fprintf( logstream, "\t rx,ry: %d, %d \t rw,rh: %d, %d\n", query_param.rx, query_param.ry, query_param.rw, query_param.rh);
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fprintf( logstream, "\t cnew: %d\n", query_param.cnew);
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fprintf( logstream, "\t cid: %s\n", query_param.cid);
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fprintf( logstream, "\t cclose: ");
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for( i=0; query_param.cclose[i][0]!=0 && i<MAX_NUMOFCCLOSE; i++)
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fprintf( logstream, "%s ", query_param.cclose[i]);
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fprintf(logstream, "\n");
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fprintf( logstream, "\t req-box-prop\n");
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for( i=0; query_param.box_type[i][0]!=0 && i<MAX_NUMOFBOX; i++){
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fprintf( logstream, "\t\t box_type: %.4s limit: %d w:%d s:%d g:%d a:%d priority:%d\n", query_param.box_type[i], query_param.limit[i], query_param.w[i], query_param.s[i], query_param.g[i], query_param.a[i], query_param.priority[i]);
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}
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fprintf( logstream, "\t root-bin: %d\n", query_param.root_bin);
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fprintf( logstream, "\t max-depth: %d\n", query_param.max_depth);
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fprintf( logstream, "\t metadata-only: %d\n", query_param.metadata_only);
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}
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void str2cclose( char *src, char cclose[][MAX_LENOFCID])
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{
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int i, u, v;
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size_t len = strlen( src);
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for( i=0, u=0, v=0; i<len; i++){
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if( src[i]==','){
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u++;
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v=0;
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}
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else
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cclose[u][v++] = src[i];
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}
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}
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void parse_req_box_prop( char *req_box_prop, int idx, query_param_t *query_param);
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void parse_metareq( char *field, query_param_t *query_param)
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{
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char req_box_prop[20];
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char *ptr, *src;
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int numofboxreq = 0;
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memset( req_box_prop, 0, 20);
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// req-box-prop
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ptr = strchr( field, '[');
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ptr++;
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src = ptr;
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while( *ptr != ']'){
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if( *ptr == ';'){
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strncpy( req_box_prop, src, ptr-src);
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parse_req_box_prop( req_box_prop, numofboxreq++, query_param);
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ptr++;
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src = ptr;
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memset( req_box_prop, 0, 20);
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}
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ptr++;
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}
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strncpy( req_box_prop, src, ptr-src);
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parse_req_box_prop( req_box_prop, numofboxreq++, query_param);
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if(( ptr = strchr( field, 'R')))
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sscanf( ptr+1, "%d", &(query_param->root_bin));
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if(( ptr = strchr( field, 'D')))
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sscanf( ptr+1, "%d", &(query_param->max_depth));
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if(( ptr = strstr( field, "!!")))
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query_param->metadata_only = true;
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}
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void parse_req_box_prop( char *req_box_prop, int idx, query_param_t *query_param)
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{
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char *ptr;
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if( *req_box_prop == '*')
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query_param->box_type[idx][0]='*';
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else
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strncpy( query_param->box_type[idx], req_box_prop, 4);
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if(( ptr = strchr( req_box_prop, ':'))){
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if( *(ptr+1)=='r')
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query_param->limit[idx] = -1;
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else
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sscanf( ptr+1, "%d", &(query_param->limit[idx]));
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}
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if(( ptr = strchr( req_box_prop, '/'))){
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ptr++;
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while( *ptr=='w' || *ptr=='s' || *ptr=='g' || *ptr=='a'){
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switch( *ptr){
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case 'w': query_param->w[idx] = true; break;
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case 's': query_param->s[idx] = true; break;
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case 'g': query_param->g[idx] = true; break;
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case 'a': query_param->a[idx] = true; break;
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}
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ptr++;
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}
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}
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else{
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query_param->g[idx] = true;
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query_param->s[idx] = true;
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query_param->w[idx] = true;
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}
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if((ptr = strchr( req_box_prop, '!')))
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query_param->priority[idx] = true;
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idx++;
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}
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