mirror of
https://github.com/Unidata/netcdf-c.git
synced 2024-11-27 07:30:33 +08:00
97ce621091
re: esupport 31942 * Add a new set of remote tests based on using the opendap hyrax server * Re-enable --enable-dap-remote-tests as default on * Make it possible to query the DMR separate from the DAP so that it is possible to delay reading data until it is actually requested. This make things like ncdump -h much more efficient. * Fix handling of <Map>s in DMRs. * Fix some memory leaks
360 lines
9.8 KiB
C
360 lines
9.8 KiB
C
/*! \file
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Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
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2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014,
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2015, 2016, 2017, 2018
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University Corporation for Atmospheric Research/Unidata.
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See \ref copyright file for more info.
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*/
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#include "d4includes.h"
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#include "d4curlfunctions.h"
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include "ncpathmgr.h"
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/* Do conversion if this code was compiled via Vis. Studio or Mingw */
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/*Forward*/
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static int readpacket(NCD4INFO* state, NCURI*, NCbytes*, NCD4mode, NCD4format, long*);
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static int readfile(NCD4INFO* state, const NCURI* uri, NCD4mode dxx, NCD4format fxx, NCbytes* packet);
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static int readfiletofile(NCD4INFO* state, const NCURI* uri, NCD4mode dxx, NCD4format fxx, FILE* stream, d4size_t* sizep);
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static int readfileDAPDMR(NCD4INFO* state, const NCURI* uri, NCbytes* packet);
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#ifdef HAVE_GETTIMEOFDAY
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static double
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deltatime(struct timeval time0,struct timeval time1)
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{
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double t0, t1;
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t0 = ((double)time0.tv_sec);
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t0 += ((double)time0.tv_usec) / 1000000.0;
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t1 = ((double)time1.tv_sec);
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t1 += ((double)time1.tv_usec) / 1000000.0;
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return (t1 - t0);
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}
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#endif
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int
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NCD4_readDMR(NCD4INFO* state, int flags)
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{
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int stat = NC_NOERR;
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long lastmod = -1;
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if((flags & NCF_ONDISK) == 0) {
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ncbytesclear(state->curl->packet);
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stat = readpacket(state,state->uri,state->curl->packet,NCD4_DMR,NCD4_FORMAT_XML,&lastmod);
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if(stat == NC_NOERR)
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state->data.dmrlastmodified = lastmod;
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} else { /*((flags & NCF_ONDISK) != 0) */
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NCURI* url = state->uri;
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int fileprotocol = (strcmp(url->protocol,"file")==0);
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if(fileprotocol) {
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stat = readfiletofile(state, url, NCD4_DMR, NCD4_FORMAT_XML, state->data.ondiskfile, &state->data.datasize);
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} else {
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char* readurl = NULL;
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int flags = 0;
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if(!fileprotocol) flags |= NCURIQUERY;
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flags |= NCURIENCODE;
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flags |= NCURIPWD;
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#ifdef FIX
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ncurisetconstraints(url,state->constraint);
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#endif
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readurl = ncuribuild(url,NULL,".dmr.xml",NCURISVC);
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if(readurl == NULL)
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return THROW(NC_ENOMEM);
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stat = NCD4_fetchurl_file(state->curl, readurl, state->data.ondiskfile,
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&state->data.datasize, &lastmod);
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nullfree(readurl);
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if(stat == NC_NOERR)
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state->data.dmrlastmodified = lastmod;
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}
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}
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return THROW(stat);
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}
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int
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NCD4_readDAP(NCD4INFO* state, int flags)
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{
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int stat = NC_NOERR;
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long lastmod = -1;
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if((flags & NCF_ONDISK) == 0) {
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ncbytesclear(state->curl->packet);
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stat = readpacket(state,state->uri,state->curl->packet,NCD4_DAP,NCD4_FORMAT_NONE,&lastmod);
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if(stat == NC_NOERR)
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state->data.daplastmodified = lastmod;
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} else { /*((flags & NCF_ONDISK) != 0) */
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NCURI* url = state->uri;
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int fileprotocol = (strcmp(url->protocol,"file")==0);
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if(fileprotocol) {
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stat = readfiletofile(state, url, NCD4_DAP, NCD4_FORMAT_NONE, state->data.ondiskfile, &state->data.datasize);
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} else {
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char* readurl = NULL;
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int flags = 0;
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if(!fileprotocol) flags |= NCURIQUERY;
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flags |= NCURIENCODE;
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flags |= NCURIPWD;
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#ifdef FIX
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ncurisetconstraints(url,state->constraint);
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#endif
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readurl = ncuribuild(url,NULL,".dap",NCURISVC);
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if(readurl == NULL)
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return THROW(NC_ENOMEM);
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stat = NCD4_fetchurl_file(state->curl, readurl, state->data.ondiskfile,
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&state->data.datasize, &lastmod);
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nullfree(readurl);
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if(stat == NC_NOERR)
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state->data.daplastmodified = lastmod;
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}
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}
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return THROW(stat);
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}
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static const char*
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dxxextension(int dxx)
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{
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switch(dxx) {
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case NCD4_DMR: return ".dmr";
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case NCD4_DAP: return ".dap";
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default: break;
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}
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return NULL;
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}
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static const char*
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dxxformat(int fxx, int dxx)
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{
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switch(dxx) {
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case NCD4_DMR:
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switch(fxx) {
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case NCD4_FORMAT_XML:return ".xml";
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default: break;
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}
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break;
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case NCD4_DAP:
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switch(fxx) {
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case NCD4_FORMAT_NONE:return "";
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default: break;
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}
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break;
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default: break;
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}
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return NULL;
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}
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static int
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readpacket(NCD4INFO* state, NCURI* url, NCbytes* packet, NCD4mode dxx, NCD4format fxx, long* lastmodified)
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{
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int stat = NC_NOERR;
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int fileprotocol = 0;
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CURL* curl = state->curl->curl;
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#ifdef HAVE_GETTIMEOFDAY
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struct timeval time0;
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struct timeval time1;
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#endif
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char suffix[256];
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suffix[0] = '\0';
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strlcat(suffix,dxxextension(dxx),sizeof(suffix));
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strlcat(suffix,dxxformat(fxx,dxx),sizeof(suffix));
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fileprotocol = (strcmp(url->protocol,"file")==0);
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if(fileprotocol) {
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/* Short circuit file://... urls*/
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/* We do this because the test code always needs to read files*/
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stat = readfile(state, url, dxx, fxx, packet);
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} else {
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char* fetchurl = NULL;
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int flags = NCURIBASE;
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if(!fileprotocol) flags |= NCURIQUERY;
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flags |= NCURIENCODE;
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fetchurl = ncuribuild(url,NULL,suffix,flags);
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MEMCHECK(fetchurl);
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if(FLAGSET(state->controls.flags,NCF_SHOWFETCH)) {
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nclog(NCLOGDBG,"fetch url=%s",fetchurl);
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#ifdef HAVE_GETTIMEOFDAY
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gettimeofday(&time0,NULL);
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#endif
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}
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stat = NCD4_fetchurl(curl,fetchurl,packet,lastmodified);
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nullfree(fetchurl);
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if(stat) goto fail;
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if(FLAGSET(state->controls.flags,NCF_SHOWFETCH)) {
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double secs = 0;
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#ifdef HAVE_GETTIMEOFDAY
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gettimeofday(&time1,NULL);
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secs = deltatime(time0,time1);
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#endif
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nclog(NCLOGDBG,"fetch complete: %0.3f",secs);
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}
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}
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#ifdef D4DEBUG
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{
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fprintf(stderr,"readpacket: packet.size=%lu\n",
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(unsigned long)ncbyteslength(packet));
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}
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#endif
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fail:
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return THROW(stat);
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}
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static int
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readfiletofile(NCD4INFO* state, const NCURI* uri, NCD4mode dxx, NCD4format fxx, FILE* stream, d4size_t* sizep)
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{
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int stat = NC_NOERR;
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NCbytes* packet = ncbytesnew();
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size_t len;
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stat = readfile(state, uri, dxx, fxx, packet);
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#ifdef D4DEBUG
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fprintf(stderr,"readfiletofile: packet.size=%lu\n",
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(unsigned long)ncbyteslength(packet));
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#endif
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if(stat != NC_NOERR) goto unwind;
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len = nclistlength(packet);
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if(stat == NC_NOERR) {
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size_t written;
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fseek(stream,0,SEEK_SET);
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written = fwrite(ncbytescontents(packet),1,len,stream);
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if(written != len) {
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#ifdef D4DEBUG
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fprintf(stderr,"readfiletofile: written!=length: %lu :: %lu\n",
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(unsigned long)written,(unsigned long)len);
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#endif
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stat = NC_EIO;
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}
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}
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if(sizep != NULL) *sizep = len;
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unwind:
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ncbytesfree(packet);
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return THROW(stat);
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}
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static int
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readfile(NCD4INFO* state, const NCURI* uri, NCD4mode dxx, NCD4format fxx, NCbytes* packet)
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{
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int stat = NC_NOERR;
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NCbytes* tmp = ncbytesnew();
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char* filename = NULL;
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char suffix[256];
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#ifdef HAVE_GETTIMEOFDAY
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struct timeval time0;
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struct timeval time1;
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#endif
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suffix[0] = '\0';
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strlcat(suffix,dxxextension(dxx),sizeof(suffix));
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#if 0
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not needed strlcat(suffix,dxxformat(fxx,dxx),sizeof(suffix));
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#endif
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ncbytescat(tmp,uri->path);
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ncbytescat(tmp,suffix);
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ncbytesnull(tmp);
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filename = ncbytesextract(tmp);
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ncbytesfree(tmp);
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nullfree(state->fileproto.filename);
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state->fileproto.filename = filename; /* filename is alloc'd here anyway */
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if(FLAGSET(state->controls.flags,NCF_SHOWFETCH)) {
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char* surl = NULL;
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#ifdef HAVE_GETTIMEOFDAY
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gettimeofday(&time0,NULL);
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#endif
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surl = ncuribuild((NCURI*)uri,NULL,NULL,NCURIALL);
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nclog(NCLOGDBG,"fetch uri=%s file=%s",surl,filename);
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}
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switch (dxx) {
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case NCD4_DMR:
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if((stat = NC_readfile(filename,packet))) {
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/* See if we can get the same thing from the .dap file */
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stat = readfileDAPDMR(state,uri,packet);
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}
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break;
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case NCD4_DAP:
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case NCD4_DSR:
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stat = NC_readfile(filename,packet);
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break;
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default: stat = NC_EDAP; break;
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}
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if(FLAGSET(state->controls.flags,NCF_SHOWFETCH)) {
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double secs;
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#ifdef HAVE_GETTIMEOFDAY
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gettimeofday(&time1,NULL);
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secs = deltatime(time0,time1);
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#endif
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nclog(NCLOGDBG,"%s fetch complete: %0.3f",suffix,secs);
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}
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return THROW(stat);
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}
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/* Extract the DMR from a DAP file */
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static int
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readfileDAPDMR(NCD4INFO* state, const NCURI* uri, NCbytes* packet)
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{
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int stat = NC_NOERR;
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NCbytes* tmp = ncbytesnew();
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char* filename = NULL;
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NCD4HDR hdr;
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#ifdef HAVE_GETTIMEOFDAY
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struct timeval time0;
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struct timeval time1;
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#endif
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ncbytescat(tmp,uri->path);
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ncbytescat(tmp,".dap");
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ncbytesnull(tmp);
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filename = ncbytesextract(tmp);
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ncbytesfree(tmp);
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nullfree(state->fileproto.filename);
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state->fileproto.filename = filename; /* filename is alloc'd here anyway */
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if(FLAGSET(state->controls.flags,NCF_SHOWFETCH)) {
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char* surl = NULL;
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#ifdef HAVE_GETTIMEOFDAY
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gettimeofday(&time0,NULL);
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#endif
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surl = ncuribuild((NCURI*)uri,NULL,".dap",NCURIALL);
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nclog(NCLOGDBG,"fetch uri=%s file=%s",surl,filename);
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}
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stat = NC_readfile(filename,packet);
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if(FLAGSET(state->controls.flags,NCF_SHOWFETCH)) {
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double secs;
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#ifdef HAVE_GETTIMEOFDAY
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gettimeofday(&time1,NULL);
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secs = deltatime(time0,time1);
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#endif
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nclog(NCLOGDBG,"fetch complete: %0.3f",secs);
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}
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if(stat != NC_NOERR) goto done;
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/* Extract the DMR from the dap */
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NCD4_getheader(ncbytescontents(packet),&hdr,NCD4_isLittleEndian());
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if(hdr.count == 0 || (hdr.flags & NCD4_ERR_CHUNK))
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return THROW(NC_EDMR);
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/* patch up the packet */
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{
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int i;
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size_t newlen;
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for(i=0;i<4;i++)
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ncbytesremove(packet,0); /* remove the hdr */
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/* null terminate */
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ncbytessetlength(packet,hdr.count-1);
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ncbytesnull(packet);
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/* Suppress nuls */
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newlen = NCD4_elidenuls(ncbytescontents(packet),ncbyteslength(packet));
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/* reset packet length */
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ncbytessetlength(packet,newlen);
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}
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done:
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return THROW(stat);
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}
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