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- /* File Access HTFile.c
- ** ===========
- **
- ** This is unix-specific code in general, with some VMS bits.
- ** These are routines for file access used by browsers.
- **
- ** History:
- ** Feb 91 Written Tim Berners-Lee CERN/CN
- ** Apr 91 vms-vms access included using DECnet syntax
- ** 26 Jun 92 (JFG) When running over DECnet, suppressed FTP.
- ** Fixed access bug for relative names on VMS.
- ** Sep 93 (MD) Access to VMS files allows sharing.
- ** 15 Nov 93 (MD) Moved HTVMSname to HTVMSUTILS.C
- **
- ** Bugs:
- ** FTP: Cannot access VMS files from a unix machine.
- ** How can we know that the
- ** target machine runs VMS?
- */
-
- #include"capalloc.h"
- #include "HTFile.h" /* Implemented here */
- #include"capstdio.h"
-
-
- #define INFINITY 512 /* file name length @@ FIXME */
- #define MULTI_SUFFIX ".multi" /* Extension for scanning formats */
-
- #include "HTUtils.h"
-
- #ifdef VMS
- #include "HTVMSUtils.h"
- #endif /* VMS */
-
- #include "HTParse.h"
- #include "tcp.h"
- #include "HTTCP.h"
- #ifndef DECNET
- #include "HTFTP.h"
- #endif
- #include "HTAnchor.h"
- #include "HTAtom.h"
- #include "HTWriter.h"
- #include "HTFWriter.h"
- #include "HTInit.h"
- #include "HTBTree.h"
-
- typedef struct _HTSuffix {
- char * suffix;
- HTAtom * rep;
- HTAtom * encoding;
- float quality;
- } HTSuffix;
-
-
- #ifdef USE_DIRENT /* Set this for Sys V systems */
- #define STRUCT_DIRENT struct dirent
- #else
- #define STRUCT_DIRENT struct direct
- #endif
-
- #include "HTML.h" /* For directory object building */
-
- #define PUTC(c) (*target->isa->put_character)(target, c)
- #define PUTS(s) (*target->isa->put_string)(target, s)
- #define START(e) (*target->isa->start_element)(target, e, 0, 0)
- #define END(e) (*target->isa->end_element)(target, e)
- #define FREE_TARGET (*target->isa->free)(target)
- struct _HTStructured {
- CONST HTStructuredClass * isa;
- /* ... */
- };
-
-
- /* Controlling globals
- **
- */
-
- PUBLIC int HTDirAccess = HT_DIR_OK;
- PUBLIC int HTDirReadme = HT_DIR_README_TOP;
-
- PRIVATE char *HTMountRoot = "/Net/"; /* Where to find mounts */
- #ifdef VMS
- PRIVATE char *HTCacheRoot = "/WWW$SCRATCH"; /* Where to cache things */
- #else
- PRIVATE char *HTCacheRoot = "/tmp/W3_Cache_"; /* Where to cache things */
- #endif
-
- /* PRIVATE char *HTSaveRoot = "$(HOME)/WWW/";*/ /* Where to save things */
-
-
- /* Suffix registration
- */
-
- PRIVATE HTList * HTSuffixes = 0;
- PRIVATE HTSuffix no_suffix = { "*", NULL, NULL, 1.0 };
- PRIVATE HTSuffix unknown_suffix = { "*.*", NULL, NULL, 1.0};
-
-
- /* Define the representation associated with a file suffix
- ** -------------------------------------------------------
- **
- ** Calling this with suffix set to "*" will set the default
- ** representation.
- ** Calling this with suffix set to "*.*" will set the default
- ** representation for unknown suffix files which contain a ".".
- **
- ** If filename suffix is already defined its previous
- ** definition is overridden.
- */
- PUBLIC void HTSetSuffix ARGS4(
- CONST char *, suffix,
- CONST char *, representation,
- CONST char *, encoding,
- float, value)
- {
-
- HTSuffix * suff;
-
- if (strcmp(suffix, "*")==0) suff = &no_suffix;
- else if (strcmp(suffix, "*.*")==0) suff = &unknown_suffix;
- else {
- HTList *cur = HTSuffixes;
-
- while (NULL != (suff = (HTSuffix*)HTList_nextObject(cur))) {
- if (suff->suffix && 0==strcmp(suff->suffix, suffix))
- break;
- }
- if (!suff) { /* Not found -- create a new node */
- suff = (HTSuffix*) calloc(1, sizeof(HTSuffix));
- if (suff == NULL) outofmem(__FILE__, "HTSetSuffix");
-
- if (!HTSuffixes) HTSuffixes = HTList_new();
- HTList_addObject(HTSuffixes, suff);
-
- StrAllocCopy(suff->suffix, suffix);
- }
- }
-
- suff->rep = HTAtom_for(representation);
-
- {
- char * enc = NULL;
- char * p;
- StrAllocCopy(enc, encoding);
- for (p=enc; *p; p++) *p = TOLOWER(*p);
- suff->encoding = HTAtom_for(encoding);
- }
-
- suff->quality = value;
- }
-
-
-
-
-
-
-
- /* Send README file
- **
- ** If a README file exists, then it is inserted into the document here.
- */
-
- #ifdef GOT_READ_DIR
- PRIVATE void do_readme ARGS2(HTStructured *, target, CONST char *, localname)
- {
- FILE * fp;
- char * readme_file_name =
- malloc(strlen(localname)+ 1 + strlen(HT_DIR_README_FILE) + 1);
- strcpy(readme_file_name, localname);
- strcat(readme_file_name, "/");
- strcat(readme_file_name, HT_DIR_README_FILE);
-
- fp = fopen(readme_file_name, "r");
-
- if (fp) {
- HTStructuredClass targetClass;
-
- targetClass = *target->isa; /* (Can't init agregate in K&R) */
- #ifdef MSDOSMEM
- {
- extern void *vp_msdosmem;
- extern void **vpp_msdosmem;
- vp_msdosmem = NULL;
- vpp_msdosmem = NULL;
- }
- #endif /* MSDOSMEM */
- START(HTML_PRE);
- for(;;){
- char c = fgetc(fp);
- if (c == (char)EOF) break;
- switch (c) {
- case '&':
- case '<':
- case '>':
- PUTC('&');
- PUTC('#');
- PUTC((char)(c / 10));
- PUTC((char) (c % 10));
- PUTC(';');
- break;
- /* case '\n':
- PUTC('\r');
- Bug removed thanks to joe@athena.mit.edu */
- default:
- PUTC(c);
- }
- }
- END(HTML_PRE);
- fclose(fp);
- }
- }
- #endif
-
-
- /* Make the cache file name for a W3 document
- ** ------------------------------------------
- ** Make up a suitable name for saving the node in
- **
- ** E.g. /tmp/WWW_Cache_news/1234@cernvax.cern.ch
- ** /tmp/WWW_Cache_http/crnvmc/FIND/xx.xxx.xx
- **
- ** On exit,
- ** returns a malloc'ed string which must be freed by the caller.
- */
- PUBLIC char * HTCacheFileName ARGS1(CONST char *,name)
- {
- char * access = HTParse(name, "", PARSE_ACCESS);
- char * host = HTParse(name, "", PARSE_HOST);
- char * path = HTParse(name, "", PARSE_PATH+PARSE_PUNCTUATION);
-
- char * result;
- result = (char *)malloc(
- strlen(HTCacheRoot)+strlen(access)
- +strlen(host)+strlen(path)+6+1);
- if (result == NULL) outofmem(__FILE__, "HTCacheFileName");
- sprintf(result, "%s/WWW/%s/%s%s", HTCacheRoot, access, host, path);
- free(path);
- free(access);
- free(host);
- return result;
- }
-
-
- /* Open a file for write, creating the path
- ** ----------------------------------------
- */
- #ifdef NOT_IMPLEMENTED
- PRIVATE int HTCreatePath ARGS1(CONST char *,path)
- {
- return -1;
- }
- #endif
-
- /* Convert filenames between local and WWW formats
- ** -----------------------------------------------
- ** Make up a suitable name for saving the node in
- **
- ** E.g. $(HOME)/WWW/news/1234@cernvax.cern.ch
- ** $(HOME)/WWW/http/crnvmc/FIND/xx.xxx.xx
- **
- ** On exit,
- ** returns a malloc'ed string which must be freed by the caller.
- */
- PUBLIC char * HTLocalName ARGS1(CONST char *,name)
- {
- char * access = HTParse(name, "", PARSE_ACCESS);
- char * host = HTParse(name, "", PARSE_HOST);
- char * path = HTParse(name, "", PARSE_PATH+PARSE_PUNCTUATION);
-
- HTUnEscape(path); /* Interpret % signs */
-
- if (0==strcmp(access, "file")) { /* local file */
- free(access);
- if ((0==strcasecomp(host, HTHostName())) ||
- (0==strcasecomp(host, "localhost")) || !*host) {
- free(host);
- if (TRACE) fprintf(stderr, "Node `%s' means path `%s'\n", name, path);
- #ifdef MSDOS
- {
- /*
- * Convert the path to a dos file name.
- */
- extern void urltodos(char *);
-
- urltodos(path);
- }
- #endif /* MSDOS */
- return(path);
- } else {
- char * result = (char *)malloc(
- strlen("/Net/")+strlen(host)+strlen(path)+1);
- if (result == NULL) outofmem(__FILE__, "HTLocalName");
- sprintf(result, "%s%s%s", "/Net/", host, path);
- free(host);
- free(path);
- if (TRACE) fprintf(stderr, "Node `%s' means file `%s'\n", name, result);
- return result;
- }
- } else { /* other access */
- char * result;
- CONST char * home = (CONST char*)getenv("HOME");
- #ifdef VMS
- if (!home)
- home = HTCacheRoot;
- else
- home = HTVMS_wwwName(home);
- #else /* not VMS */
- if (!home) home = "/tmp";
- #endif /* not VMS */
- result = (char *)malloc(
- strlen(home)+strlen(access)+strlen(host)+strlen(path)+6+1);
- if (result == NULL) outofmem(__FILE__, "HTLocalName");
- sprintf(result, "%s/WWW/%s/%s%s", home, access, host, path);
- free(path);
- free(access);
- free(host);
- return result;
- }
- }
-
-
- /* Make a WWW name from a full local path name
- **
- ** Bugs:
- ** At present, only the names of two network root nodes are hand-coded
- ** in and valid for the NeXT only. This should be configurable in
- ** the general case.
- */
-
- PUBLIC char * WWW_nameOfFile ARGS1 (CONST char *,name)
- {
- char * result;
- #ifdef NeXT
- if (0==strncmp("/private/Net/", name, 13)) {
- result = (char *)malloc(7+strlen(name+13)+1);
- if (result == NULL) outofmem(__FILE__, "WWW_nameOfFile");
- sprintf(result, "file://%s", name+13);
- } else
- #endif
- if (0==strncmp(HTMountRoot, name, 5)) {
- result = (char *)malloc(7+strlen(name+5)+1);
- if (result == NULL) outofmem(__FILE__, "WWW_nameOfFile");
- sprintf(result, "file://%s", name+5);
- } else {
- result = (char *)malloc(7+strlen(HTHostName())+strlen(name)+1);
- if (result == NULL) outofmem(__FILE__, "WWW_nameOfFile");
- sprintf(result, "file://%s%s", HTHostName(), name);
- }
- if (TRACE) fprintf(stderr, "File `%s'\n\tmeans node `%s'\n", name, result);
- return result;
- }
-
-
- /* Determine a suitable suffix, given the representation
- ** -----------------------------------------------------
- **
- ** On entry,
- ** rep is the atomized MIME style representation
- **
- ** On exit,
- ** returns a pointer to a suitable suffix string if one has been
- ** found, else "".
- */
- PUBLIC CONST char * HTFileSuffix ARGS1(HTAtom*, rep)
- {
- HTSuffix * suff;
- int n;
- int i;
-
- #ifndef NO_INIT
- if (!HTSuffixes) HTFileInit();
- #endif
- n = HTList_count(HTSuffixes);
- for(i=0; i<n; i++) {
- suff = HTList_objectAt(HTSuffixes, i);
- if (suff->rep == rep) {
- return suff->suffix; /* OK -- found */
- }
- }
- return ""; /* Dunno */
- }
-
-
- /* Determine file format from file name
- ** ------------------------------------
- **
- ** This version will return the representation and also set
- ** a variable for the encoding.
- **
- ** It will handle for example x.txt, x.txt,Z, x.Z
- */
-
- PUBLIC HTFormat HTFileFormat ARGS2 (
- CONST char *, filename,
- HTAtom **, pencoding)
-
- {
- HTSuffix * suff;
- int n;
- int i;
- int lf = strlen(filename);
-
- #ifndef NO_INIT
- if (!HTSuffixes) HTFileInit();
- #endif
- *pencoding = NULL;
- n = HTList_count(HTSuffixes);
- for(i=0; i<n; i++) {
- int ls;
- suff = HTList_objectAt(HTSuffixes, i);
- ls = strlen(suff->suffix);
- if ((ls <= lf) && 0==strcmp(suff->suffix, filename + lf - ls)) {
- int j;
- *pencoding = suff->encoding;
- if (suff->rep) return suff->rep; /* OK -- found */
-
- for(j=0; j<n; j++) { /* Got encoding, need representation */
- int ls2;
- suff = HTList_objectAt(HTSuffixes, j);
- ls2 = strlen(suff->suffix);
- if ((ls <= lf) && 0==strncmp(
- suff->suffix, filename + lf - ls -ls2, ls2)) {
- if (suff->rep) return suff->rep;
- }
- }
-
- }
- }
-
- /* defaults tree */
-
- suff = strchr(filename, '.') ? /* Unknown suffix */
- ( unknown_suffix.rep ? &unknown_suffix : &no_suffix)
- : &no_suffix;
-
- /* set default encoding unless found with suffix already */
- if (!*pencoding) *pencoding = suff->encoding ? suff->encoding
- : HTAtom_for("binary");
- return suff->rep ? suff->rep : WWW_BINARY;
- }
-
-
- /* Determine value from file name
- ** ------------------------------
- **
- */
-
- PUBLIC float HTFileValue ARGS1 (CONST char *,filename)
-
- {
- HTSuffix * suff;
- int n;
- int i;
- int lf = strlen(filename);
-
- #ifndef NO_INIT
- if (!HTSuffixes) HTFileInit();
- #endif
- n = HTList_count(HTSuffixes);
- for(i=0; i<n; i++) {
- int ls;
- suff = HTList_objectAt(HTSuffixes, i);
- ls = strlen(suff->suffix);
- if ((ls <= lf) && 0==strcmp(suff->suffix, filename + lf - ls)) {
- if (TRACE) fprintf(stderr, "File: Value of %s is %.3f\n",
- filename, suff->quality);
- return suff->quality; /* OK -- found */
- }
- }
- return 0.3; /* Dunno! */
- }
-
-
- /* Determine write access to a file
- ** --------------------------------
- **
- ** On exit,
- ** return value YES if file can be accessed and can be written to.
- **
- ** Bugs:
- ** 1. No code for non-unix systems.
- ** 2. Isn't there a quicker way?
- */
-
- #ifdef VMS
- #define NO_GROUPS
- #endif
- #ifdef NO_UNIX_IO
- #define NO_GROUPS
- #endif
- #ifdef PCNFS
- #define NO_GROUPS
- #endif
- #ifdef MSDOS
- #define NO_GROUPS
- #endif
-
- PUBLIC BOOL HTEditable ARGS1 (CONST char *,filename)
- {
- #ifdef NO_GROUPS
- return NO; /* Safe answer till we find the correct algorithm */
- #else
- int groups[NGROUPS];
- uid_t myUid;
- int ngroups; /* The number of groups */
- struct stat fileStatus;
- int i;
-
- if (stat(filename, &fileStatus)) /* Get details of filename */
- return NO; /* Can't even access file! */
-
- ngroups = getgroups(NGROUPS, groups); /* Groups to which I belong */
- myUid = geteuid(); /* Get my user identifier */
-
- if (TRACE) {
- int i;
- fprintf(stderr,
- "File mode is 0%o, uid=%d, gid=%d. My uid=%d, %d groups (",
- (unsigned int) fileStatus.st_mode, fileStatus.st_uid,
- fileStatus.st_gid,
- myUid, ngroups);
- for (i=0; i<ngroups; i++) fprintf(stderr, " %d", groups[i]);
- fprintf(stderr, ")\n");
- }
-
- if (fileStatus.st_mode & 0002) /* I can write anyway? */
- return YES;
-
- if ((fileStatus.st_mode & 0200) /* I can write my own file? */
- && (fileStatus.st_uid == myUid))
- return YES;
-
- if (fileStatus.st_mode & 0020) /* Group I am in can write? */
- {
- for (i=0; i<ngroups; i++) {
- if (groups[i] == fileStatus.st_gid)
- return YES;
- }
- }
- if (TRACE) fprintf(stderr, "\tFile is not editable.\n");
- return NO; /* If no excuse, can't do */
- #endif
- }
-
-
- /* Make a save stream
- ** ------------------
- **
- ** The stream must be used for writing back the file.
- ** @@@ no backup done
- */
- PUBLIC HTStream * HTFileSaveStream ARGS1(HTParentAnchor *, anchor)
- {
-
- CONST char * addr = HTAnchor_address((HTAnchor*)anchor);
- char * localname = HTLocalName(addr);
-
- FILE* fp = fopen(localname, "w");
- if (!fp) return NULL;
-
- return HTFWriter_new(fp);
-
- }
-
- /* Output one directory entry
- **
- */
- PUBLIC void HTDirEntry ARGS3(HTStructured *, target,
- CONST char * , tail,
- CONST char *, entry)
- {
- char * relative;
- char * escaped = HTEscape(entry, URL_XPALPHAS);
-
- /* If empty tail, gives absolute ref below */
- relative = (char*) malloc(
- strlen(tail) + strlen(escaped)+2);
- if (relative == NULL) outofmem(__FILE__, "DirRead");
- sprintf(relative, "%s/%s", tail, escaped);
- HTStartAnchor(target, NULL, relative);
- free(escaped);
- free(relative);
- PUTS(entry);
- END(HTML_A);
- }
-
- /* Output parent directory entry
- **
- ** This gives the TITLE and H1 header, and also a link
- ** to the parent directory if appropriate.
- */
- PUBLIC void HTDirTitles ARGS2(HTStructured *, target,
- HTAnchor * , anchor)
-
- {
- char * logical = HTAnchor_address(anchor);
- char * path = HTParse(logical, "", PARSE_PATH + PARSE_PUNCTUATION);
- char * current;
-
- current = strrchr(path, '/'); /* last part or "" */
- free(logical);
-
- {
- char * printable = NULL;
- StrAllocCopy(printable, (current + 1));
- HTUnEscape(printable);
- #ifdef MSDOSMEM
- {
- extern void *vp_msdosmem;
- extern void **vpp_msdosmem;
- vp_msdosmem = NULL;
- vpp_msdosmem = NULL;
- }
- #endif /* MSDOSMEM */
- START(HTML_TITLE);
- PUTS(*printable ? printable : "Welcome ");
- PUTS(" directory");
- END(HTML_TITLE);
-
- #ifdef MSDOSMEM
- {
- extern void *vp_msdosmem;
- extern void **vpp_msdosmem;
- vp_msdosmem = NULL;
- vpp_msdosmem = NULL;
- }
- #endif /* MSDOSMEM */
- START(HTML_H1);
- PUTS(*printable ? printable : "Welcome");
- END(HTML_H1);
- free(printable);
- }
-
- /* Make link back to parent directory
- */
-
- if (current && current[1]) { /* was a slash AND something else too */
- char * parent;
- char * relative;
- *current++ = 0;
- parent = strrchr(path, '/'); /* penultimate slash */
-
- relative = (char*) malloc(strlen(current) + 4);
- if (relative == NULL) outofmem(__FILE__, "DirRead");
- sprintf(relative, "%s/..", current);
- HTStartAnchor(target, "", relative);
- free(relative);
-
- PUTS("Up to ");
- if (parent) {
- char * printable = NULL;
- StrAllocCopy(printable, parent + 1);
- HTUnEscape(printable);
- PUTS(printable);
- free(printable);
- } else {
- PUTS("/");
- }
-
- END(HTML_A);
-
- }
- free(path);
- }
-
-
-
- /* Load a document
- ** ---------------
- **
- ** On entry,
- ** addr must point to the fully qualified hypertext reference.
- ** This is the physsical address of the file
- **
- ** On exit,
- ** returns <0 Error has occured.
- ** HTLOADED OK
- **
- */
- PUBLIC int HTLoadFile ARGS4 (
- CONST char *, addr,
- HTParentAnchor *, anchor,
- HTFormat, format_out,
- HTStream *, sink
- )
- {
- char * filename;
- HTFormat format;
- char * nodename = 0;
- char * newname=0; /* Simplified name of file */
- HTAtom * encoding; /* @@ not used yet */
-
- /* Reduce the filename to a basic form (hopefully unique!)
- */
- StrAllocCopy(newname, addr);
- filename=HTParse(newname, "", PARSE_PATH|PARSE_PUNCTUATION);
- nodename=HTParse(newname, "", PARSE_HOST);
- free(newname);
-
- format = HTFileFormat(filename, &encoding);
-
-
- #ifdef VMS
- /* Assume that the file is in Unix-style syntax if it contains a '/'
- after the leading one @@ */
- {
- FILE * fp;
- char * vmsname = strchr(filename + 1, '/') ?
- HTVMS_name(nodename, filename) : filename + 1;
- fp = fopen(vmsname, "r", "shr=put", "shr=upd");
-
- /* If the file wasn't VMS syntax, then perhaps it is ultrix
- */
- if (!fp) {
- char ultrixname[INFINITY];
- if (TRACE) fprintf(stderr, "HTFile: Can't open as %s\n", vmsname);
- sprintf(ultrixname, "%s::\"%s\"", nodename, filename);
- fp = fopen(ultrixname, "r", "shr=put", "shr=upd");
- if (!fp) {
- if (TRACE) fprintf(stderr,
- "HTFile: Can't open as %s\n", ultrixname);
- }
- }
- if (fp)
- {
- if (HTEditable(vmsname)) {
- HTAtom * put = HTAtom_for("PUT");
- HTList * methods = HTAnchor_methods(anchor);
- if (HTList_indexOf(methods, put) == (-1)) {
- HTList_addObject(methods, put);
- }
- }
- HTParseFile(format, format_out, anchor, fp, sink);
- fclose(fp);
- return HT_LOADED;
- } /* If successfull open */
- }
- #else
-
- free(filename);
-
- /* For unix, we try to translate the name into the name of a transparently
- ** mounted file.
- **
- ** Not allowed in secure (HTClienntHost) situations TBL 921019
- */
- #ifndef NO_UNIX_IO
- /* Need protection here for telnet server but not httpd server */
-
- if (!HTSecure) { /* try local file system */
- char * localname = HTLocalName(addr);
- struct stat dir_info;
-
- #ifdef GOT_READ_DIR
-
- /* Multiformat handling
- **
- ** If needed, scan directory to find a good file.
- ** Bug: we don't stat the file to find the length
- */
- if ( (strlen(localname) > strlen(MULTI_SUFFIX))
- && (0==strcmp(localname + strlen(localname) - strlen(MULTI_SUFFIX),
- MULTI_SUFFIX))) {
- DIR *dp;
-
- STRUCT_DIRENT * dirbuf;
- float best = NO_VALUE_FOUND; /* So far best is bad */
- HTFormat best_rep = NULL; /* Set when rep found */
- STRUCT_DIRENT best_dirbuf; /* Best dir entry so far */
-
- char * base = strrchr(localname, '/');
- int baselen;
-
- if (!base || base == localname) goto forget_multi;
- *base++ = 0; /* Just got directory name */
- baselen = strlen(base)- strlen(MULTI_SUFFIX);
- base[baselen] = 0; /* Chop off suffix */
-
- dp = opendir(localname);
- if (!dp) {
- forget_multi:
- free(localname);
- return HTLoadError(sink, 500,
- "Multiformat: directory scan failed.");
- }
-
- while ((dirbuf = readdir(dp))!=0) {
- /* while there are directory entries to be read */
- if (dirbuf->d_ino == 0) continue;
- /* if the entry is not being used, skip it */
-
- if (dirbuf->d_namlen > baselen && /* Match? */
- !strncmp(dirbuf->d_name, base, baselen)) {
- HTFormat rep = HTFileFormat(dirbuf->d_name, &encoding);
- float value = HTStackValue(rep, format_out,
- HTFileValue(dirbuf->d_name),
- 0.0 /* @@@@@@ */);
- if (value != NO_VALUE_FOUND) {
- if (TRACE) fprintf(stderr,
- "HTFile: value of presenting %s is %f\n",
- HTAtom_name(rep), value);
- if (value > best) {
- best_rep = rep;
- best = value;
- best_dirbuf = *dirbuf;
- }
- } /* if best so far */
- } /* if match */
-
- } /* end while directory entries left to read */
- closedir(dp);
-
- if (best_rep) {
- format = best_rep;
- base[-1] = '/'; /* Restore directory name */
- base[0] = 0;
- StrAllocCat(localname, best_dirbuf.d_name);
- goto open_file;
-
- } else { /* If not found suitable file */
- free(localname);
- return HTLoadError(sink, 403, /* List formats? */
- "Could not find suitable representation for transmission.");
- }
- /*NOTREACHED*/
- } /* if multi suffix */
- /*
- ** Check to see if the 'localname' is in fact a directory. If it is
- ** create a new hypertext object containing a list of files and
- ** subdirectories contained in the directory. All of these are links
- ** to the directories or files listed.
- ** NB This assumes the existance of a type 'STRUCT_DIRENT', which will
- ** hold the directory entry, and a type 'DIR' which is used to point to
- ** the current directory being read.
- */
-
-
- if (stat(localname,&dir_info) == -1) { /* get file information */
- /* if can't read file information */
- if (TRACE) fprintf(stderr, "HTFile: can't stat %s\n", localname);
-
- } else { /* Stat was OK */
-
-
- if (((dir_info.st_mode) & S_IFMT) == S_IFDIR) {
- /* if localname is a directory */
-
- HTStructured* target; /* HTML object */
- HTStructuredClass targetClass;
-
- DIR *dp;
- STRUCT_DIRENT * dirbuf;
-
- char * logical;
- char * tail;
-
- BOOL present[HTML_A_ATTRIBUTES];
-
- char * tmpfilename = NULL;
- struct stat file_info;
-
- if (TRACE)
- fprintf(stderr,"%s is a directory\n",localname);
-
- /* Check directory access.
- ** Selective access means only those directories containing a
- ** marker file can be browsed
- */
- if (HTDirAccess == HT_DIR_FORBID) {
- free(localname);
- return HTLoadError(sink, 403,
- "Directory browsing is not allowed.");
- }
-
-
- if (HTDirAccess == HT_DIR_SELECTIVE) {
- char * enable_file_name =
- malloc(strlen(localname)+ 1 +
- strlen(HT_DIR_ENABLE_FILE) + 1);
- strcpy(enable_file_name, localname);
- strcat(enable_file_name, "/");
- strcat(enable_file_name, HT_DIR_ENABLE_FILE);
- if (stat(enable_file_name, &file_info) != 0) {
- free(localname);
- return HTLoadError(sink, 403,
- "Selective access is not enabled for this directory");
- }
- }
-
-
- dp = opendir(localname);
- if (!dp) {
- free(localname);
- return HTLoadError(sink, 403, "This directory is not readable.");
- }
-
-
- /* Directory access is allowed and possible
- */
- logical = HTAnchor_address((HTAnchor*)anchor);
- tail = strrchr(logical, '/') +1; /* last part or "" */
-
- target = HTML_new(anchor, format_out, sink);
- targetClass = *target->isa; /* Copy routine entry points */
-
- { int i;
- for(i=0; i<HTML_A_ATTRIBUTES; i++)
- present[i] = (i==HTML_A_HREF);
- }
-
- HTDirTitles(target, (HTAnchor *)anchor);
-
- if (HTDirReadme == HT_DIR_README_TOP)
- do_readme(target, localname);
- {
- HTBTree * bt = HTBTree_new((HTComparer)strcasecomp);
-
- while ((dirbuf = readdir(dp))!=0)
- {
- HTBTElement * dirname = NULL;
-
- /* while there are directory entries to be read */
- if (dirbuf->d_ino == 0)
- /* if the entry is not being used, skip it */
- continue;
-
-
- /* if the current entry is parent directory */
- if ((*(dirbuf->d_name)=='.') ||
- (*(dirbuf->d_name)==','))
- continue; /* skip those files whose name begins
- with '.' or ',' */
-
- dirname = (HTBTElement *)malloc(
- strlen(dirbuf->d_name) + 2);
- if (dirname == NULL) outofmem(__FILE__,"DirRead");
- StrAllocCopy(tmpfilename,localname);
- if (strcmp(localname,"/"))
-
- /* if filename is not root directory */
- StrAllocCat(tmpfilename,"/");
-
-
- StrAllocCat(tmpfilename,dirbuf->d_name);
- stat(tmpfilename, &file_info);
- if (((file_info.st_mode) & S_IFMT) == S_IFDIR)
- sprintf((char *)dirname,"D%s",dirbuf->d_name);
- else sprintf((char *)dirname,"F%s",dirbuf->d_name);
- /* D & F to have first directories, then files */
- HTBTree_add(bt,dirname); /* Sort dirname in the tree bt */
- }
-
- /* Run through tree printing out in order
- */
- {
- HTBTElement * next_element = HTBTree_next(bt,NULL);
- /* pick up the first element of the list */
- char state;
- /* I for initial (.. file),
- D for directory file,
- F for file */
-
- state = 'I';
-
- while (next_element != NULL)
- {
- StrAllocCopy(tmpfilename,localname);
- if (strcmp(localname,"/"))
-
- /* if filename is not root directory */
- StrAllocCat(tmpfilename,"/");
-
- StrAllocCat(tmpfilename,
- (char *)HTBTree_object(next_element)+1);
- /* append the current entry's filename to the path */
- HTSimplify(tmpfilename);
- /* Output the directory entry */
- if (strcmp((char *)
- (HTBTree_object(next_element)),"D.."))
- {
- if (state != *(char *)(HTBTree_object(next_element)))
- {
- if (state == 'D')
- END(HTML_DIR);
- state = *(char *)
- (HTBTree_object(next_element))=='D'?'D':'F';
- #ifdef MSDOSMEM
- {
- extern void *vp_msdosmem;
- extern void **vpp_msdosmem;
- vp_msdosmem = NULL;
- vpp_msdosmem = NULL;
- }
- #endif /* MSDOSMEM */
- START(HTML_H2);
- PUTS(state == 'D'?"Subdirectories:":"Files");
- END(HTML_H2);
- #ifdef MSDOSMEM
- {
- extern void *vp_msdosmem;
- extern void **vpp_msdosmem;
- vp_msdosmem = NULL;
- vpp_msdosmem = NULL;
- }
- #endif /* MSDOSMEM */
- START(HTML_DIR);
- }
- #ifdef MSDOSMEM
- {
- extern void *vp_msdosmem;
- extern void **vpp_msdosmem;
- vp_msdosmem = NULL;
- vpp_msdosmem = NULL;
- }
- #endif /* MSDOSMEM */
- START(HTML_LI);
- }
- HTDirEntry(target, tail,
- (char*)HTBTree_object(next_element) +1);
-
- next_element = HTBTree_next(bt,next_element);
- /* pick up the next element of the list;
- if none, return NULL*/
- }
- if (state == 'I')
- {
- #ifdef MSDOSMEM
- {
- extern void *vp_msdosmem;
- extern void **vpp_msdosmem;
- vp_msdosmem = NULL;
- vpp_msdosmem = NULL;
- }
- #endif /* MSDOSMEM */
- START(HTML_P);
- PUTS("Empty Directory");
- }
- else
- END(HTML_DIR);
- }
-
- /* end while directory entries left to read */
- closedir(dp);
- free(logical);
- free(tmpfilename);
- HTBTreeAndObject_free(bt);
-
- if (HTDirReadme == HT_DIR_README_BOTTOM)
- do_readme(target, localname);
- FREE_TARGET;
- free(localname);
- return HT_LOADED; /* document loaded */
- }
-
- } /* end if localname is directory */
-
- } /* end if file stat worked */
-
- /* End of directory reading section
- */
- #endif
- open_file:
- {
- FILE * fp = fopen(localname,"r");
-
- if(TRACE) fprintf (stderr, "HTFile: Opening `%s' gives %p\n",
- localname, (void*)fp);
- if (fp) { /* Good! */
- if (HTEditable(localname)) {
- HTAtom * put = HTAtom_for("PUT");
- HTList * methods = HTAnchor_methods(anchor);
- if (HTList_indexOf(methods, put) == (-1)) {
- HTList_addObject(methods, put);
- }
- }
- free(localname);
- HTParseFile(format, format_out, anchor, fp, sink);
- fclose(fp);
- return HT_LOADED;
- } /* If succesfull open */
- } /* scope of fp */
- } /* local unix file system */
- #endif
- #endif
-
- #ifndef DECNET
- /* Now, as transparently mounted access has failed, we try FTP.
- */
- {
- if (strcmp(nodename, HTHostName())!=0)
- return HTFTPLoad(addr, anchor, format_out, sink);
- }
- #endif
-
- /* All attempts have failed.
- */
- {
- if (TRACE)
- printf("Can't open `%s', errno=%d\n", addr, errno);
-
- return HTLoadError(sink, 403, "Can't access requested file.");
- }
-
-
- }
-
- /* Protocol descriptors
- */
- GLOBALDEF PUBLIC HTProtocol HTFTP = { "ftp", HTLoadFile, 0 };
- GLOBALDEF PUBLIC HTProtocol HTFile = { "file", HTLoadFile, HTFileSaveStream };