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/* Copyright 2009, UCAR/Unidata and OPeNDAP, Inc.
See the COPYRIGHT file for more information. */
#include "config.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef _MSC_VER
#include <io.h>
#ifndef O_BINARY
#define O_BINARY _O_BINARY
#endif
#endif
#include "ncrc.h"
#include "ocinternal.h"
#include "ocdebug.h"
#include "ochttp.h"
#include "ocread.h"
#include "occurlfunctions.h"
#include "ncwinpath.h"
/*Forward*/
static int readpacket(OCstate* state, NCURI*, NCbytes*, OCdxd, long*);
static int readfile(const char* path, const char* suffix, NCbytes* packet);
static int readfiletofile(const char* path, const char* suffix, FILE* stream, off_t*);
int
readDDS(OCstate* state, OCtree* tree)
{
int stat = OC_NOERR;
long lastmodified = -1;
ncurisetquery(state->uri,tree->constraint);
#ifdef OCDEBUG
fprintf(stderr,"readDDS:\n");
#endif
stat = readpacket(state,state->uri,state->packet,OCDDS,
&lastmodified);
if(stat == OC_NOERR) state->ddslastmodified = lastmodified;
return stat;
}
int
readDAS(OCstate* state, OCtree* tree)
{
int stat = OC_NOERR;
ncurisetquery(state->uri,tree->constraint);
#ifdef OCDEBUG
fprintf(stderr,"readDAS:\n");
#endif
stat = readpacket(state,state->uri,state->packet,OCDAS,NULL);
return stat;
}
#if 0
int
readversion(OCstate* state, NCURI* url, NCbytes* packet)
{
return readpacket(state,url,packet,OCVER,NULL);
}
#endif
const char*
ocdxdextension(OCdxd dxd)
{
switch(dxd) {
case OCDDS: return ".dds";
case OCDAS: return ".das";
case OCDATADDS: return ".dods";
default: break;
}
return NULL;
}
static int
readpacket(OCstate* state, NCURI* url,NCbytes* packet,OCdxd dxd,long* lastmodified)
{
int stat = OC_NOERR;
int fileprotocol = 0;
const char* suffix = ocdxdextension(dxd);
char* fetchurl = NULL;
CURL* curl = state->curl;
fileprotocol = (strcmp(url->protocol,"file")==0);
if(fileprotocol) {
/* Short circuit file://... urls and read directly */
fetchurl = ncuribuild(url,NULL,NULL,NCURIBASE);
stat = readfile(fetchurl,suffix,packet);
} else {
int flags = NCURIBASE;
if(!fileprotocol) flags |= NCURIQUERY;
flags |= NCURIENCODE;
fetchurl = ncuribuild(url,NULL,suffix,flags);
MEMCHECK(fetchurl,OC_ENOMEM);
if(ocdebug > 0)
{fprintf(stderr,"fetch url=%s\n",fetchurl); fflush(stderr);}
stat = ocfetchurl(curl,fetchurl,packet,lastmodified);
if(stat)
oc_curl_printerror(state);
if(ocdebug > 0)
{fprintf(stderr,"fetch complete\n"); fflush(stderr);}
}
free(fetchurl);
#ifdef OCDEBUG
{
fprintf(stderr,"readpacket: packet.size=%lu\n",
(unsigned long)ncbyteslength(packet));
}
#endif
return OCTHROW(stat);
}
int
readDATADDS(OCstate* state, OCtree* tree, OCflags flags)
{
int stat = OC_NOERR;
long lastmod = -1;
#ifdef OCDEBUG
fprintf(stderr,"readDATADDS:\n");
#endif
if((flags & OCONDISK) == 0) {
ncurisetquery(state->uri,tree->constraint);
stat = readpacket(state,state->uri,state->packet,OCDATADDS,&lastmod);
if(stat == OC_NOERR)
state->datalastmodified = lastmod;
tree->data.datasize = ncbyteslength(state->packet);
} else { /*((flags & OCONDISK) != 0) */
NCURI* url = state->uri;
int fileprotocol = 0;
char* readurl = NULL;
fileprotocol = (strcmp(url->protocol,"file")==0);
if(fileprotocol) {
readurl = ncuribuild(url,NULL,NULL,NCURIBASE);
stat = readfiletofile(readurl, ".dods", tree->data.file, &tree->data.datasize);
} else {
int flags = NCURIBASE;
if(!fileprotocol) flags |= NCURIQUERY;
flags |= NCURIENCODE;
ncurisetquery(url,tree->constraint);
readurl = ncuribuild(url,NULL,".dods",flags);
MEMCHECK(readurl,OC_ENOMEM);
if (ocdebug > 0)
{fprintf(stderr, "fetch url=%s\n", readurl);fflush(stderr);}
stat = ocfetchurl_file(state->curl, readurl, tree->data.file,
&tree->data.datasize, &lastmod);
if(stat == OC_NOERR)
state->datalastmodified = lastmod;
if (ocdebug > 0)
{fprintf(stderr,"fetch complete\n"); fflush(stderr);}
}
free(readurl);
}
return OCTHROW(stat);
}
static int
readfiletofile(const char* path, const char* suffix, FILE* stream, off_t* sizep)
{
int stat = OC_NOERR;
NCbytes* packet = ncbytesnew();
size_t len;
/* check for leading file:/// */
if(ocstrncmp(path,"file:///",8)==0) path += 7; /* assume absolute path*/
stat = readfile(path,suffix,packet);
#ifdef OCDEBUG
fprintf(stderr,"readfiletofile: packet.size=%lu\n",
(unsigned long)ncbyteslength(packet));
#endif
if(stat != OC_NOERR) goto unwind;
len = nclistlength(packet);
if(stat == OC_NOERR) {
size_t written;
fseek(stream,0,SEEK_SET);
written = fwrite(ncbytescontents(packet),1,len,stream);
if(written != len) {
#ifdef OCDEBUG
fprintf(stderr,"readfiletofile: written!=length: %lu :: %lu\n",
(unsigned long)written,(unsigned long)len);
#endif
stat = OC_EIO;
}
}
if(sizep != NULL) *sizep = len;
unwind:
ncbytesfree(packet);
return OCTHROW(stat);
}
static int
readfile(const char* path, const char* suffix, NCbytes* packet)
{
int stat = OC_NOERR;
char filename[1024];
/* check for leading file:/// */
if(ocstrncmp(path,"file://",7)==0) path += 7; /* assume absolute path*/
if(!occopycat(filename,sizeof(filename),2,path,(suffix != NULL ? suffix : "")))
return OCTHROW(OC_EOVERRUN);
stat = NC_readfile(filename,packet);
return OCTHROW(stat);
}
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