/* Copyright 2009, UCAR/Unidata and OPeNDAP, Inc. See the COPYRIGHT file for more information. */ #include "config.h" #include #include #include #ifdef HAVE_UNISTD_H #include #endif #include "ocinternal.h" #include "ocdebug.h" #include "occlientparams.h" #include "ocrc.h" #include "occurlfunctions.h" #include "ochttp.h" #include "ocread.h" #include "dapparselex.h" /* Note: TMPPATH must end in '/' */ #ifdef __CYGWIN__ #define TMPPATH1 "/cygdrive/c/temp/" #define TMPPATH2 "./" #elif WIN32 #define TMPPATH1 "c:\\temp\\" #define TMPPATH2 ".\\" #else #define TMPPATH1 "/tmp/" #define TMPPATH2 "./" #endif /* Define default rc files and aliases*/ static char* rcfilenames[4] = {".daprc",".dodsrc",".ocrc",NULL}; static int ocextractddsinmemory(OCstate*,OCtree*,int); static int ocextractddsinfile(OCstate*,OCtree*,int); static char* constraintescape(const char* url); static OCerror createtempfile(OCstate*,OCtree*); static int createtempfile1(char*,char**); static void ocsetcurlproperties(OCstate*); extern OCnode* makeunlimiteddimension(void); #ifdef WIN32 #include #define _S_IREAD 256 #define _S_IWRITE 128 #else #include #endif /* Collect global state info in one place */ struct OCGLOBALSTATE ocglobalstate; int ocinternalinitialize(void) { int stat = OC_NOERR; if(!ocglobalstate.initialized) { memset((void*)&ocglobalstate,0,sizeof(ocglobalstate)); ocglobalstate.initialized = 1; } /* Compute some xdr related flags */ xxdr_init(); ocloginit(); oc_curl_protocols(&ocglobalstate); /* see what protocols are supported */ /* compile the .dodsrc, if any */ { char* path = NULL; char* homepath = NULL; char** alias; FILE* f = NULL; /* locate the configuration files: . first in '.', then $HOME */ for(alias=rcfilenames;*alias;alias++) { path = (char*)malloc(strlen("./")+strlen(*alias)+1); if(path == NULL) return OC_ENOMEM; strcpy(path,"./"); strcat(path,*alias); /* see if file is readable */ f = fopen(path,"r"); if(f != NULL) break; if(path != NULL) {free(path); path = NULL;} /* cleanup */ } if(f == NULL) { /* try $HOME */ OCASSERT(path == NULL); homepath = getenv("HOME"); if (homepath!= NULL) { for(alias=rcfilenames;*alias;alias++) { path = (char*)malloc(strlen(homepath)+1+strlen(*alias)+1); if(path == NULL) return OC_ENOMEM; strcpy(path,homepath); strcat(path,"/"); strcat(path,*alias); f = fopen(path,"r"); if(f != NULL) break; if(path != NULL) {free(path); path=NULL;} } } } if(f == NULL) { oclog(OCLOGDBG,"Cannot find runtime configuration file"); } else { OCASSERT(path != NULL); fclose(f); if(ocdebug > 1) fprintf(stderr, "DODS RC file: %s\n", path); if(ocdodsrc_read(*alias,path) == 0) oclog(OCLOGERR, "Error parsing %s\n",path); } if(path != NULL) free(path); } return OCTHROW(stat); } /**************************************************/ OCerror ocopen(OCstate** statep, const char* url) { int stat = OC_NOERR; OCstate * state = NULL; OCURI* tmpurl = NULL; CURL* curl = NULL; /* curl handle*/ if(!ocuriparse(url,&tmpurl)) {OCTHROWCHK(stat=OC_EBADURL); goto fail;} stat = occurlopen(&curl); if(stat != OC_NOERR) {OCTHROWCHK(stat); goto fail;} state = (OCstate*)ocmalloc(sizeof(OCstate)); /* ocmalloc zeros memory*/ if(state == NULL) {OCTHROWCHK(stat=OC_ENOMEM); goto fail;} /* Setup DAP state*/ state->header.magic = OCMAGIC; state->header.occlass = OC_State; state->curl = curl; state->trees = oclistnew(); state->uri = tmpurl; if(!ocuridecodeparams(state->uri)) { oclog(OCLOGWARN,"Could not parse client parameters"); } state->packet = ocbytesnew(); ocbytessetalloc(state->packet,DFALTPACKETSIZE); /*initial reasonable size*/ /* set curl properties for this link */ ocsetcurlproperties(state); if(statep) *statep = state; return OCTHROW(stat); fail: ocurifree(tmpurl); if(state != NULL) ocfree(state); if(curl != NULL) occurlclose(curl); return OCTHROW(stat); } OCerror ocfetch(OCstate* state, const char* constraint, OCdxd kind, OCflags flags, OCnode** rootp) { OCtree* tree = NULL; OCnode* root = NULL; OCerror stat = OC_NOERR; tree = (OCtree*)ocmalloc(sizeof(OCtree)); MEMCHECK(tree,OC_ENOMEM); memset((void*)tree,0,sizeof(OCtree)); tree->dxdclass = kind; tree->state = state; tree->constraint = constraintescape(constraint); if(tree->constraint == NULL) tree->constraint = nulldup(constraint); /* Set curl properties: pwd, flags, proxies, ssl */ if((stat=ocset_user_password(state))!= OC_NOERR) goto fail; if((stat=ocset_curl_flags(state)) != OC_NOERR) goto fail; if((stat=ocset_proxy(state)) != OC_NOERR) goto fail; if((stat=ocset_ssl(state)) != OC_NOERR) goto fail; ocbytesclear(state->packet); switch (kind) { case OCDAS: stat = readDAS(state,tree); if(stat == OC_NOERR) { tree->text = ocbytesdup(state->packet); if(tree->text == NULL) stat = OC_EDAS; } break; case OCDDS: stat = readDDS(state,tree); if(stat == OC_NOERR) { tree->text = ocbytesdup(state->packet); if(tree->text == NULL) stat = OC_EDDS; } break; case OCDATADDS: if((flags & OCONDISK) != 0) {/* store in file */ /* Create the datadds file immediately so that DRNO can reference it*/ /* Make the tmp file*/ stat = createtempfile(state,tree); if(stat) {OCTHROWCHK(stat); goto fail;} stat = readDATADDS(state,tree,flags); if(stat == OC_NOERR) { /* Separate the DDS from data and return the dds; will modify packet */ stat = ocextractddsinfile(state,tree,flags); } } else { /*inmemory*/ stat = readDATADDS(state,tree,flags); if(stat == OC_NOERR) { /* Separate the DDS from data and return the dds; will modify packet */ stat = ocextractddsinmemory(state,tree,flags); } } break; default: break; }/*switch*/ if(stat != OC_NOERR) { /* Obtain any http code */ state->error.httpcode = ocfetchhttpcode(state->curl); if(state->error.httpcode >= 400) { oclog(OCLOGWARN,"oc_open: Could not read url; http error = %l",state->error.httpcode); } else { oclog(OCLOGWARN,"oc_open: Could not read url"); } goto fail; } tree->nodes = NULL; stat = DAPparse(state,tree,tree->text); /* Check and report on an error return from the server */ if(stat == OC_EDAPSVC && state->error.code != NULL) { oclog(OCLOGERR,"oc_open: server error retrieving url: code=%s message=\"%s\"", state->error.code, (state->error.message?state->error.message:"")); } if(stat) {OCTHROWCHK(stat); goto fail;} root = tree->root; /* make sure */ tree->root = root; root->tree = tree; /* Verify the parse */ switch (kind) { case OCDAS: if(root->octype != OC_Attributeset) {OCTHROWCHK(stat=OC_EDAS); goto fail;} break; case OCDDS: if(root->octype != OC_Dataset) {OCTHROWCHK(stat=OC_EDDS); goto fail;} break; case OCDATADDS: if(root->octype != OC_Dataset) {OCTHROWCHK(stat=OC_EDATADDS); goto fail;} /* Modify the tree kind */ tree->dxdclass = OCDATADDS; break; default: return OC_EINVAL; } if(kind != OCDAS) { /* Process ocnodes to mark those that are cacheable */ ocmarkcacheable(state,root); /* Process ocnodes to handle various semantic issues*/ occomputesemantics(tree->nodes); } /* Process ocnodes to compute name info*/ occomputefullnames(tree->root); if(kind == OCDATADDS) { if((flags & OCONDISK) != 0) { tree->data.xdrs = xxdr_filecreate(tree->data.file,tree->data.bod); } else { #ifdef OCDEBUG fprintf(stderr,"ocfetch.datadds.memory: datasize=%lu bod=%lu\n", (unsigned long)tree->data.datasize,(unsigned long)tree->data.bod); #endif /* Switch to zero based memory */ tree->data.xdrs = xxdr_memcreate(tree->data.memory,tree->data.datasize,tree->data.bod); } MEMCHECK(tree->data.xdrs,OC_ENOMEM); /* Compile the data into a more accessible format */ stat = occompile(state,tree->root); if(stat != OC_NOERR) goto fail; } /* Put root into the state->trees list */ oclistpush(state->trees,(void*)root); if(rootp) *rootp = root; return stat; fail: if(root != NULL) ocroot_free(root); else if(tree != NULL) octree_free(tree); return OCTHROW(stat); } static OCerror createtempfile(OCstate* state, OCtree* tree) { int fd = 0; char* name = NULL; fd = createtempfile1(TMPPATH1,&name); if(fd < 0) fd = createtempfile1(TMPPATH2,&name); if(fd < 0) { oclog(OCLOGERR,"oc_open: attempt to open tmp file failed: %s",name); if(name) free(name); return errno; } #ifdef OCDEBUG oclog(OCLOGNOTE,"oc_open: using tmp file: %s",name); #endif tree->data.filename = name; /* remember our tmp file name */ tree->data.file = fdopen(fd,"w+"); if(tree->data.file == NULL) return OC_EOPEN; /* unlink the temp file so it will automatically be reclaimed */ if(ocdebug == 0) unlink(tree->data.filename); return OC_NOERR; } int createtempfile1(char* tmppath, char** tmpnamep) { int fd = 0; char* tmpname = NULL; tmpname = (char*)malloc(strlen(tmppath)+strlen("dataddsXXXXXX")+1); if(tmpname == NULL) return -1; strcpy(tmpname,tmppath); #ifdef HAVE_MKSTEMP strcat(tmpname,"dataddsXXXXXX"); /* Note Potential problem: old versions of this function leave the file in mode 0666 instead of 0600 */ fd = mkstemp(tmpname); #else /* !HAVE_MKSTEMP */ /* Need to simulate by using some kind of pseudo-random number */ strcat(tmpname,"datadds"); { int rno = rand(); char spid[7]; if(rno < 0) rno = -rno; sprintf(spid,"%06d",rno); strcat(tmpname,spid); # ifdef WIN32 fd=open(tmpname,O_RDWR|O_BINARY|O_CREAT|O_EXCL|FILE_ATTRIBUTE_TEMPORARY, _S_IREAD|_S_IWRITE); # else fd=open(tmpname,O_RDWR|O_CREAT|O_EXCL, S_IRWXU); # endif } #endif /* !HAVE_MKSTEMP */ if(tmpname == NULL) return -1; if(tmpnamep) *tmpnamep = tmpname; else free(tmpname); return fd; } void occlose(OCstate* state) { unsigned int i; if(state == NULL) return; /* Warning: ocfreeroot will attempt to remove the root from state->trees */ /* Ok in this case because we are popping the root out of state->trees */ for(i=0;itrees);i++) { OCnode* root = (OCnode*)oclistpop(state->trees); ocroot_free(root); } oclistfree(state->trees); ocurifree(state->uri); ocbytesfree(state->packet); ocfree(state->error.code); ocfree(state->error.message); ocfree(state->curlflags.useragent); ocfree(state->curlflags.cookiejar); ocfree(state->curlflags.cookiefile); ocfree(state->ssl.certificate); ocfree(state->ssl.key); ocfree(state->ssl.keypasswd); ocfree(state->ssl.cainfo); ocfree(state->ssl.capath); ocfree(state->proxy.host); ocfree(state->creds.username); ocfree(state->creds.password); if(state->curl != NULL) occurlclose(state->curl); ocfree(state); } static OCerror ocextractddsinmemory(OCstate* state, OCtree* tree, OCflags flags) { OCerror stat = OC_NOERR; size_t ddslen, bod, bodfound; /* Read until we find the separator (or EOF)*/ bodfound = ocfindbod(state->packet,&bod,&ddslen); if(!bodfound) {/* No BOD; pretend */ bod = tree->data.bod; ddslen = tree->data.datasize; } tree->data.bod = bod; tree->data.ddslen = ddslen; /* copy out the dds */ if(ddslen > 0) { tree->text = (char*)ocmalloc(ddslen+1); memcpy((void*)tree->text,(void*)ocbytescontents(state->packet),ddslen); tree->text[ddslen] = '\0'; } else tree->text = NULL; /* Extract the inmemory contents */ tree->data.memory = ocbytesextract(state->packet); #ifdef OCIGNORE /* guarantee the data part is on an 8 byte boundary */ if(tree->data.bod % 8 != 0) { unsigned long count = tree->data.datasize - tree->data.bod; memcpy(tree->xdrmemory,tree->xdrmemory+tree->data.bod,count); tree->data.datasize = count; tree->data.bod = 0; tree->data.ddslen = 0; } #endif if(tree->text == NULL) stat = OC_EDATADDS; return OCTHROW(stat); } static OCerror ocextractddsinfile(OCstate* state, OCtree* tree, OCflags flags) { OCerror stat = OC_NOERR; size_t ddslen, bod, bodfound; /* Read until we find the separator (or EOF)*/ ocbytesclear(state->packet); rewind(tree->data.file); bodfound = 0; do { char chunk[1024]; size_t count; /* read chunks of the file until we find the separator*/ count = fread(chunk,1,sizeof(chunk),tree->data.file); if(count <= 0) break; /* EOF;*/ ocbytesappendn(state->packet,chunk,count); bodfound = ocfindbod(state->packet,&bod,&ddslen); } while(!bodfound); if(!bodfound) {/* No BOD; pretend */ bod = tree->data.bod; ddslen = tree->data.datasize; #ifdef OCDEBUG fprintf(stderr,"missing bod: ddslen=%lu bod=%lu\n", (unsigned long)ddslen,(unsigned long)bod); #endif } tree->data.bod = bod; tree->data.ddslen = ddslen; /* copy out the dds */ if(ddslen > 0) { tree->text = (char*)ocmalloc(ddslen+1); memcpy((void*)tree->text,(void*)ocbytescontents(state->packet),ddslen); tree->text[ddslen] = '\0'; } else tree->text = NULL; /* reset the position of the tmp file*/ fseek(tree->data.file,tree->data.bod,SEEK_SET); if(tree->text == NULL) stat = OC_EDATADDS; return OCTHROW(stat); } /* Allow these (non-alpha-numerics) to pass thru */ static char okchars[] = "&/:;,.=?@'\"<>{}!|\\^[]`~"; static char hexdigits[] = "0123456789abcdef"; /* Modify constraint to use %XX escapes */ static char* constraintescape(const char* url) { size_t len; char* p; int c; char* eurl; if(url == NULL) return NULL; len = strlen(url); eurl = ocmalloc(1+3*len); /* worst case: c -> %xx */ MEMCHECK(eurl,NULL); p = eurl; *p = '\0'; while((c=*url++)) { if(c >= '0' && c <= '9') {*p++ = c;} else if(c >= 'a' && c <= 'z') {*p++ = c;} else if(c >= 'A' && c <= 'Z') {*p++ = c;} else if(strchr(okchars,c) != NULL) {*p++ = c;} else { *p++ = '%'; *p++ = hexdigits[(c & 0xf0)>>4]; *p++ = hexdigits[(c & 0xf)]; } } *p = '\0'; return eurl; } OCerror ocupdatelastmodifieddata(OCstate* state) { OCerror status = OC_NOERR; long lastmodified; char* base = NULL; base = ocuribuild(state->uri,NULL,NULL,OCURIENCODE); status = ocfetchlastmodified(state->curl, base, &lastmodified); free(base); if(status == OC_NOERR) { state->datalastmodified = lastmodified; } return status; } /* Set curl properties for link based on rc files */ static void ocsetcurlproperties(OCstate* state) { CURLcode cstat = CURLE_OK; /* process the triple store wrt to this state */ if(ocdodsrc_process(state) != OC_NOERR) { oclog(OCLOGERR,"Malformed .opendaprc configuration file"); goto fail; } if(state->creds.username == NULL && state->creds.password == NULL) { if(state->uri->user != NULL && state->uri->password != NULL) { /* this overrides .dodsrc */ if(state->creds.password) free(state->creds.password); state->creds.password = nulldup(state->uri->password); if(state->creds.username) free(state->creds.username); state->creds.username = nulldup(state->uri->user); } } if(state->curlflags.useragent == NULL) { size_t len = strlen(DFALTUSERAGENT) + strlen(VERSION) + 1; char* agent = (char*)malloc(len); snprintf(agent,len,"%s%s",DFALTUSERAGENT,VERSION); state->curlflags.useragent = agent; } return; fail: if(cstat != CURLE_OK) oclog(OCLOGERR, "curl error: %s", curl_easy_strerror(cstat)); return; } OCerror ocsetuseragent(OCstate* state, const char* agent) { if(state->curlflags.useragent != NULL) free(state->curlflags.useragent); state->curlflags.useragent = strdup(agent); if(state->curlflags.useragent == NULL) return OC_ENOMEM; return OC_NOERR; }