int
NCD4_readDAP(NCD4INFO* state, int flags)
{
int stat = NC_NOERR;
long lastmod = -1;
if((flags & NCF_ONDISK) == 0) {
stat = readpacket(state,state->uri,state->curl->packet,NCD4_DAP,&lastmod);
if(stat == NC_NOERR)
state->data.daplastmodified = lastmod;
} else { /*((flags & NCF_ONDISK) != 0) */
NCURI* url = state->uri;
int fileprotocol = (strcmp(url->protocol,"file")==0);
if(fileprotocol) {
stat = readfiletofile(state, url, ".dap", state->data.ondiskfile, &state->data.datasize);
} else {
char* readurl = NULL;
int flags = 0;
if(!fileprotocol) flags |= NCURIQUERY;
flags |= NCURIENCODE;
flags |= NCURIPWD;
#ifdef FIX
ncurisetconstraints(url,state->constraint);
#endif
readurl = ncuribuild(url,NULL,".dods",NCURISVC);
if(readurl == NULL)
return THROW(NC_ENOMEM);
stat = NCD4_fetchurl_file(state->curl, readurl, state->data.ondiskfile,
&state->data.datasize, &lastmod);
nullfree(readurl);
if(stat == NC_NOERR)
state->data.daplastmodified = lastmod;
}
}
return THROW(stat);
}
/* Do a simple uri parse: return 0 if fail, 1 otherwise*/
int
ncuriparse(const char* uri0, NCURI** durip)
{
NCURI* duri = NULL;
char* uri = NULL;
char* p;
struct NC_ProtocolInfo* proto;
int i,nprotos;
/* accumulate parse points*/
char* protocol = NULL;
char* host = NULL;
char* port = NULL;
char* constraint = NULL;
char* user = NULL;
char* pwd = NULL;
char* file = NULL;
char* prefixparams = NULL;
char* suffixparams = NULL;
if(uri0 == NULL || strlen(uri0) == 0)
{THROW(1); goto fail;}
duri = (NCURI*)calloc(1,sizeof(NCURI));
if(duri == NULL)
{THROW(2); goto fail;}
/* save original uri */
duri->uri = nulldup(uri0);
/* make local copy of uri */
uri = (char*)malloc(strlen(uri0)+1+PADDING); /* +1 for trailing null,
+PADDING for shifting */
if(uri == NULL)
{THROW(3); goto fail;}
/* strings will be broken into pieces with intermixed '\0; characters;
first char is guaranteed to be '\0' */
duri->strings = uri;
uri++;
/* dup the incoming url */
strcpy(uri,uri0);
/* Walk the uri and do the following:
1. remove all whitespace
2. remove all '\\' (Temp hack to remove escape characters
inserted by Windows or MinGW)
*/
for(p=uri;*p;p++) {
if(*p == '\\' || *p < ' ')
nclshift1(p); /* compress out */
}
p = uri;
/* break up the uri string into big chunks: prefixparams, protocol,
host section, and the file section (i.e. remainder)
*/
/* collect any prefix bracketed parameters */
if(*p == LBRACKET) {
prefixparams = p+1;
/* find end of the clientparams; convert LB,RB to '&' */
for(;*p;p++) {
if(p[0] == RBRACKET && p[1] == LBRACKET) {
p[0] = '&';
nclshift1(p+1);
} else if(p[0] == RBRACKET && p[1] != LBRACKET)
break;
}
if(*p == 0)
{THROW(4); goto fail; /* malformed client params*/}
terminate(p); /* nul term the prefixparams (overwrites
the final RBRACKET) */
p++; /* move past the final RBRACKET */
}
/* Tag the protocol */
protocol = p;
p = strchr(p,':');
if(!p)
{THROW(5); goto fail;}
terminate(p); /*overwrite colon*/
p++; /* skip the colon */
/* verify that the uri starts with an acceptable protocol*/
nprotos = (sizeof(legalprotocols)/sizeof(struct NC_ProtocolInfo));
proto = NULL;
for(i=0;i<nprotos;i++) {
if(strcmp(protocol,legalprotocols[i].name)==0) {
proto = &legalprotocols[i];
break;
}
}
if(proto == NULL)
{THROW(6); goto fail; /* illegal protocol*/}
/* skip // */
if(p[0] != '/' && p[1] != '/')
{THROW(7); goto fail;}
p += 2;
/* If this is all we have (proto://) then fail */
if(*p == EOFCHAR)
{THROW(8); goto fail;}
/* establish the start of the file section */
if(proto->filelike) {/* everything after proto:// */
file = p;
host = NULL; /* and no host section */
} else { /*!proto->filelike => This means there should be a host section */
/* locate the end of the host section and therefore the start
of the file section */
host = p;
p = nclocate(p,"/?#");
if(p == NULL) {
file = endof(host); /* there is no file section */
} else {
ncrshift1(p); /* make room to terminate the host section
without overwriting the leading character */
terminate(p); /* terminate the host section */
file = p+1; /* +1 becauseof the shift */
}
}
/* If you shift in the code below, you must reset file beginning */
if(host != NULL) {/* Parse the host section */
/* Check for leading user:pwd@ */
p = strchr(host,'@');
if(p) {
if(p == host)
{THROW(9); goto fail; /* we have proto://@ */}
user = host;
terminate(p); /* overwrite '@' */
host = p+1; /* start of host ip name */
p = strchr(user,':');
if(p == NULL)
{THROW(10); goto fail; /* malformed */}
terminate(p); /*overwrite colon */
pwd = p+1;
}
/* extract host and port */
p = host;
p = strchr(p,':');
if(p != NULL) {
terminate(p);
p++;
port = p;
if(*port == EOFCHAR)
{THROW(11); goto fail; /* we have proto://...:/ */}
/* The port must look something like a number */
for(;*p;p++) {
if(strchr("0123456789-",*p) == NULL)
{THROW(12); goto fail; /* probably not a real port, fail */}
}
} /* else *p == NULL */
/* check for empty host section */
if(*host == EOFCHAR)
{THROW(13); goto fail;}
}
assert(file != NULL);
p = file;
/* find the end of the file section and the start of the
constraints and/or suffixparams
*/
p = nclocate(p,"?#");
if(p != NULL) { /* we have constraint and/or suffixparams */
char* fileend = p; /* save the end of the file section */
char* constraintend = NULL;
if(*p == '?')
constraint = p+1;
else
constraint = NULL;
p = strchr(p,'#'); /* may repeat effect of nclocate above */
if(p != NULL) {
constraintend = p;
suffixparams = p+1;
} else
suffixparams = NULL;
/* Ok, terminate the pieces */
terminate(fileend); /* terminate file section */
if(constraint != NULL && constraintend != NULL)
terminate(constraintend);
/* Suffix params are already terminated
since they should be the last section
of the original url
*/
}
/* check for empty sections */
if(file != NULL && *file == EOFCHAR)
file = NULL; /* empty file section */
if(constraint != NULL && *constraint == EOFCHAR)
constraint = NULL; /* empty constraint section */
if(suffixparams != NULL && *suffixparams == EOFCHAR)
suffixparams = NULL; /* empty suffixparams section */
if(suffixparams != NULL) {
/* there really are suffix params; so rebuild the suffix params */
if(*suffixparams == LBRACKET) suffixparams++;
p = suffixparams;
/* convert RBRACKET LBRACKET to '&' */
for(;*p;p++) {
if(p[0] == RBRACKET && p[1] == LBRACKET) {
p[0] = '&';
nclshift1(p+1);
} else if(p[0] == RBRACKET && p[1] != LBRACKET) {
/* terminate suffixparams */
*p = EOFCHAR;
break;
}
}
if(*suffixparams == EOFCHAR)
suffixparams = NULL; /* suffixparams are empty */
}
/* do last minute empty check */
if(protocol != NULL && *protocol == EOFCHAR) protocol = NULL;
if(user != NULL && *user == EOFCHAR) user = NULL;
if(pwd != NULL && *pwd == EOFCHAR) pwd = NULL;
if(host != NULL && *host == EOFCHAR) host = NULL;
if(port != NULL && *port == EOFCHAR) port = NULL;
if(file != NULL && *file == EOFCHAR) file = NULL;
if(constraint != NULL && *constraint == EOFCHAR) constraint = NULL;
/* assemble the component pieces */
duri->protocol = protocol;
duri->user = user;
duri->password = pwd;
duri->host = host;
duri->port = port;
duri->file = file;
ncurisetconstraints(duri,constraint);
/* concat suffix and prefix params */
if(prefixparams != NULL || suffixparams != NULL) {
int plen = prefixparams ? strlen(prefixparams) : 0;
int slen = suffixparams ? strlen(suffixparams) : 0;
int space = plen + slen + 1;
/* add 1 for an extra ampersand if both are defined */
space++;
duri->params = (char*)malloc(space);
duri->params[0] = EOFCHAR; /* so we can use strcat */
if(plen > 0) {
strcat(duri->params,prefixparams);
if(slen > 0)
strcat(duri->params,"&");
}
if(slen > 0)
strcat(duri->params,suffixparams);
}
#ifdef NCXDEBUG
{
fprintf(stderr,"duri:");
fprintf(stderr," params=|%s|",FIX(duri->params));
fprintf(stderr," protocol=|%s|",FIX(duri->protocol));
fprintf(stderr," host=|%s|",FIX(duri->host));
fprintf(stderr," port=|%s|",FIX(duri->port));
fprintf(stderr," file=|%s|",FIX(duri->file));
fprintf(stderr," constraint=|%s|",FIX(duri->constraint));
fprintf(stderr,"\n");
}
#endif
if(durip != NULL)
*durip = duri;
else
ncurifree(duri);
return 1;
fail:
if(duri != NULL) {
ncurifree(duri);
}
return 0;
}
