mirror of
https://github.com/Unidata/netcdf-c.git
synced 2024-12-27 08:49:16 +08:00
5fa2defc7e
Prior to this PR, DAP4 always fetched the whole (constrained) dataset This PR changes the query processing so 1. It reads data on a per-variable request (equivalent to calling nc_get_var()). 2. It tracks a response for every query. Most of the changes reflect having to do per-variable requests. In any case, doing all this significantly reduces the amount of data transmitted and hence speeds up DAP4 requests.
133 lines
4.3 KiB
C
133 lines
4.3 KiB
C
/*
|
|
* Copyright 2018, University Corporation for Atmospheric Research
|
|
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
|
|
*/
|
|
|
|
#ifndef NCURI_H
|
|
#define NCURI_H
|
|
|
|
#include "ncexternl.h"
|
|
|
|
/* Define flags to control what is included by ncuribuild;
|
|
protocol+host+port always included
|
|
*/
|
|
#define NCURIPATH 1
|
|
#define NCURIPWD 2
|
|
#define NCURIQUERY 4
|
|
#define NCURIFRAG 8
|
|
#define NCURIENCODEPATH 16 /* If output url path should be encoded */
|
|
#define NCURIENCODEQUERY 32 /* If output url query should be encoded */
|
|
#define NCURIENCODE (NCURIENCODEPATH|NCURIENCODEQUERY)
|
|
#define NCURIBASE (NCURIPWD|NCURIPATH)
|
|
#define NCURISVC (NCURIBASE|NCURIQUERY) /* for sending to server */
|
|
#define NCURIALL (NCURIBASE|NCURIQUERY|NCURIFRAG) /* for rebuilding after changes */
|
|
|
|
/*! This is an open structure meaning
|
|
it is ok to directly access its fields
|
|
*/
|
|
typedef struct NCURI {
|
|
char* uri; /* copy of url as passed by the caller */
|
|
char* protocol;
|
|
char* user; /* from user:password@ */
|
|
char* password; /* from user:password@ */
|
|
char* host; /*!< host*/
|
|
char* port; /*!< port */
|
|
char* path; /*!< path */
|
|
char* query; /*!< query */
|
|
char* fragment; /*!< fragment */
|
|
void* fraglist; /* some representation of the decomposed fragment string */
|
|
void* querylist; /* some representation of the decomposed query string */
|
|
} NCURI;
|
|
|
|
#if 0
|
|
/* Declaration modifiers for DLL support (MSC et al) */
|
|
#if defined(DLL_NETCDF) /* define when library is a DLL */
|
|
# if defined(DLL_EXPORT) /* define when building the library */
|
|
# define MSC_EXTRA __declspec(dllexport)
|
|
# else
|
|
# define MSC_EXTRA __declspec(dllimport)
|
|
# endif
|
|
# include <io.h>
|
|
#else
|
|
#define MSC_EXTRA /**< Needed for DLL build. */
|
|
#endif /* defined(DLL_NETCDF) */
|
|
|
|
#define EXTERNL MSC_EXTRA extern /**< Needed for DLL build. */
|
|
#endif
|
|
|
|
#if defined(_CPLUSPLUS_) || defined(__CPLUSPLUS__) || defined(__CPLUSPLUS)
|
|
extern "C" {
|
|
#endif
|
|
|
|
EXTERNL int ncuriparse(const char* s, NCURI** ncuri);
|
|
EXTERNL void ncurifree(NCURI* ncuri);
|
|
|
|
/* Replace the protocol */
|
|
EXTERNL int ncurisetprotocol(NCURI*,const char* newprotocol);
|
|
|
|
/* Replace the host */
|
|
EXTERNL int ncurisethost(NCURI*,const char* newhost);
|
|
|
|
/* Replace the path */
|
|
EXTERNL int ncurisetpath(NCURI*,const char* newpath);
|
|
|
|
/* Replace the constraints */
|
|
EXTERNL int ncurisetquery(NCURI*,const char* query);
|
|
|
|
/* Replace the fragment list */
|
|
EXTERNL int ncurisetfragments(NCURI*, const char* fragments);
|
|
|
|
/* Rebuild the uri */
|
|
EXTERNL int ncurirebuild(NCURI*);
|
|
|
|
/* Replace a specific &key=...& in uri fragment */
|
|
EXTERNL int ncurisetfragmentkey(NCURI* duri,const char* key, const char* value);
|
|
|
|
/* append a specific &key=...& in uri fragment */
|
|
EXTERNL int ncuriappendfragmentkey(NCURI* duri,const char* key, const char* value);
|
|
|
|
/* Replace a specific &key=...& in uri query */
|
|
EXTERNL int ncurisetquerykey(NCURI* duri,const char* key, const char* value);
|
|
|
|
/* append a specific &key=...& in uri query */
|
|
EXTERNL int ncuriappendquerykey(NCURI* duri,const char* key, const char* value);
|
|
|
|
/* Get the actual list of queryies */
|
|
EXTERNL void* ncuriqueryparams(NCURI* uri);
|
|
/* Get the actual list of frags */
|
|
EXTERNL void* ncurifragmentparams(NCURI* uri);
|
|
|
|
|
|
/* Construct a complete NC URI; caller frees returned string */
|
|
EXTERNL char* ncuribuild(NCURI*,const char* prefix, const char* suffix, int flags);
|
|
|
|
/*! Search the fragment for a given parameter
|
|
Null result => entry not found; !NULL=>found;
|
|
In any case, the result is imutable and should not be free'd.
|
|
*/
|
|
EXTERNL const char* ncurifragmentlookup(NCURI*, const char* param);
|
|
|
|
/*! Search the query for a given parameter
|
|
Null result => entry not found; !NULL=>found;
|
|
In any case, the result is imutable and should not be free'd.
|
|
*/
|
|
EXTERNL const char* ncuriquerylookup(NCURI*, const char* param);
|
|
|
|
/* URL Encode/Decode */
|
|
EXTERNL char* ncuridecode(const char* s);
|
|
/* Partial decode */
|
|
EXTERNL char* ncuridecodepartial(const char* s, const char* decodeset);
|
|
/* Encode using specified character set */
|
|
EXTERNL char* ncuriencodeonly(const char* s, const char* allowable);
|
|
/* Encode user or pwd */
|
|
EXTERNL char* ncuriencodeuserpwd(const char* s);
|
|
|
|
/* Deep clone a uri */
|
|
EXTERNL NCURI* ncuriclone(NCURI*);
|
|
|
|
#if defined(_CPLUSPLUS_) || defined(__CPLUSPLUS__) || defined(__CPLUSPLUS)
|
|
}
|
|
#endif
|
|
|
|
#endif /*NCURI_H*/
|