/* Take action using a system command
** ----------------------------------
** Creates temporary file, writes to it and then executes system
** command (maybe an external viewer) when EOF has been reached. The
** stream finds a suitable name of the temporary file which preserves the
** suffix. This way, the system command can find out the file type from
** the name of the temporary file name.
*/
PUBLIC HTStream* HTSaveAndExecute (HTRequest * request,
void * param,
HTFormat input_format,
HTFormat output_format,
HTStream * output_stream)
{
FILE * fp = NULL;
char * filename = NULL;
HTUserProfile * up = HTRequest_userProfile(request);
char * tmproot = HTUserProfile_tmp(up);
if (HTLib_secure()) {
HTRequest_addError(request, ERR_NON_FATAL, NO, HTERR_UNAUTHORIZED,
NULL, 0, "HTSaveLocally");
return HTErrorStream();
}
if (!tmproot) {
HTTRACE(STREAM_TRACE, "Save File... turned off");
return HTErrorStream();
}
/* Let's find a hash name for this file without asking user */
{
HTParentAnchor *anchor = (HTParentAnchor *) HTRequest_anchor(request);
char *suffix = HTBind_getSuffix(anchor);
filename = get_filename(tmproot, HTAnchor_physical(anchor), suffix, NO);
HT_FREE(suffix);
if (filename) {
if ((fp = fopen(filename, "wb")) == NULL) {
HTRequest_addError(request, ERR_NON_FATAL, NO, HTERR_NO_FILE,
filename, strlen(filename),"HTSaveAndExecute");
HT_FREE(filename);
return HTErrorStream();
}
} else {
HTTRACE(STREAM_TRACE, "Save File... No file name\n");
return HTErrorStream();
}
}
/* Now we are ready for creating the file writer stream */
if (fp) {
HTStream * me = HTFileSave_new(request, fp, NO);
me->filename = filename;
if (param) {
if ((me->end_command = (char *) HT_MALLOC((strlen((char *) param) + 10 + 3*strlen(filename)))) == NULL)
HT_OUTOFMEM("SaveAndExecute");
sprintf (me->end_command,
(char *)param, filename, filename, filename);
}
return me;
}
HT_FREE(filename);
return HTErrorStream();
}
PRIVATE int FileEvent (SOCKET soc, void * pVoid, HTEventType type)
{
file_info *file = pVoid; /* Specific access information */
int status = HT_ERROR;
HTNet * net = file->net;
HTRequest * request = HTNet_request(net);
HTParentAnchor * anchor = HTRequest_anchor(request);
/*
** Initiate a new file structure and bind to request structure
** This is actually state FILE_BEGIN, but it can't be in the state
** machine as we need the structure first.
*/
if (type == HTEvent_CLOSE) { /* Interrupted */
HTRequest_addError(request, ERR_FATAL, NO, HTERR_INTERRUPTED,
NULL, 0, "HTLoadFile");
FileCleanup(request, HT_INTERRUPTED);
return HT_OK;
}
/* Now jump into the machine. We know the state from the previous run */
while (1) {
switch (file->state) {
case FS_BEGIN:
/* We only support safe (GET, HEAD, etc) methods for the moment */
if (!HTMethod_isSafe(HTRequest_method(request))) {
HTRequest_addError(request, ERR_FATAL, NO, HTERR_NOT_ALLOWED,
NULL, 0, "HTLoadFile");
file->state = FS_ERROR;
break;
}
/* Check whether we have access to local disk at all */
if (HTLib_secure()) {
HTTRACE(PROT_TRACE, "LoadFile.... No access to local file system\n");
file->state = FS_TRY_FTP;
break;
}
file->local = HTWWWToLocal(HTAnchor_physical(anchor), "",
HTRequest_userProfile(request));
if (!file->local) {
file->state = FS_TRY_FTP;
break;
}
/* Create a new host object and link it to the net object */
{
HTHost * host = NULL;
if ((host = HTHost_new("localhost", 0)) == NULL) return HT_ERROR;
HTNet_setHost(net, host);
if (HTHost_addNet(host, net) == HT_PENDING) {
HTTRACE(PROT_TRACE, "HTLoadFile.. Pending...\n");
/* move to the hack state */
file->state = FS_PENDING;
return HT_OK;
}
}
file->state = FS_DO_CN;
break;
case FS_PENDING:
/*
** 2000/08/10 JK : This is a funny state. Because of the
** internal libwww stacks, when doing multiple local
** requests (e.g., while using the Robot), we need to ask
** again for the host object. If we had jumped directly to
** the FS_DO_CN state, libwww would have blocked because
** of socket starvation.
** This state is similar to FS_BEGINNING, but just requests
** the host object.
** YES. THIS IS AN UGLY HACK!!
*/
{
HTHost * host = NULL;
if ((host = HTHost_new("localhost", 0)) == NULL) return HT_ERROR;
HTNet_setHost(net, host);
if (HTHost_addNet(host, net) == HT_PENDING) {
HTTRACE(PROT_TRACE, "HTLoadFile.. Pending...\n");
file->state = FS_PENDING;
return HT_OK;
}
}
file->state = FS_DO_CN;
break;
case FS_DO_CN:
/*
** If we have to do content negotiation then find the object that
** fits best into either what the client has indicated in the
** accept headers or what the client has registered on its own.
** The object chosen can in fact be a directory! However, content
** negotiation only makes sense if we can read the directory!
** We stat the file in order to find the size and to see it if
** exists.
*/
if (HTRequest_negotiation(request) &&
HTMethod_isSafe(HTRequest_method(request))) {
char * conneg = HTMulti(request, file->local,&file->stat_info);
if (conneg) {
HT_FREE(file->local);
file->local = conneg;
HTAnchor_setPhysical(anchor, conneg);
HTTRACE(PROT_TRACE, "Load File... Found `%s\'\n" _ conneg);
} else {
HTTRACE(PROT_TRACE, "Load File... Not found - even tried content negotiation\n");
HTRequest_addError(request, ERR_FATAL, NO, HTERR_NOT_FOUND,
NULL, 0, "HTLoadFile");
file->state = FS_ERROR;
break;
}
} else {
if (HT_STAT(file->local, &file->stat_info) == -1) {
HTTRACE(PROT_TRACE, "Load File... Not found `%s\'\n" _ file->local);
HTRequest_addError(request, ERR_FATAL, NO, HTERR_NOT_FOUND,
NULL, 0, "HTLoadFile");
file->state = FS_ERROR;
break;
}
}
/*
** Check to see if the 'localname' is in fact a directory.
** Note that we can't do a HEAD on a directory
*/
if (((file->stat_info.st_mode) & S_IFMT) == S_IFDIR) {
if (HTRequest_method(request) == METHOD_GET)
file->state = FS_PARSE_DIR;
else {
HTRequest_addError(request, ERR_INFO, NO, HTERR_NO_CONTENT,
NULL, 0, "HTLoadFile");
file->state = FS_NO_DATA;
}
break;
}
/*
** If empty file then only serve it if it is editable. We also get
** the bindings for the file suffixes in lack of better bindings
*/
{
BOOL editable = HTEditable(file->local, &file->stat_info);
if (file_suffix_binding) HTBind_getAnchorBindings(anchor);
if (editable) HTAnchor_appendAllow(anchor, METHOD_PUT);
/* Set the file size */
if (file->stat_info.st_size)
HTAnchor_setLength(anchor, file->stat_info.st_size);
/* Set the file last modified time stamp */
if (file->stat_info.st_mtime > 0)
HTAnchor_setLastModified(anchor, file->stat_info.st_mtime);
/* Check to see if we can edit it */
if (!editable && !file->stat_info.st_size) {
HTRequest_addError(request, ERR_INFO, NO, HTERR_NO_CONTENT,
NULL, 0, "HTLoadFile");
file->state = FS_NO_DATA;
} else {
file->state = (HTRequest_method(request)==METHOD_GET) ?
FS_NEED_OPEN_FILE : FS_GOT_DATA;
}
}
break;
case FS_NEED_OPEN_FILE:
status = HTFileOpen(net, file->local, HT_FB_RDONLY);
if (status == HT_OK) {
/*
** Create the stream pipe FROM the channel to the application.
** The target for the input stream pipe is set up using the
** stream stack.
*/
{
HTStream * rstream = HTStreamStack(HTAnchor_format(anchor),
HTRequest_outputFormat(request),
HTRequest_outputStream(request),
request, YES);
HTNet_setReadStream(net, rstream);
HTRequest_setOutputConnected(request, YES);
}
/*
** Create the stream pipe TO the channel from the application
** and hook it up to the request object
*/
{
HTOutputStream * output = HTNet_getOutput(net, NULL, 0);
HTRequest_setInputStream(request, (HTStream *) output);
}
/*
** Set up concurrent read/write if this request isn't the
** source for a PUT or POST. As source we don't start reading
** before all destinations are ready. If destination then
** register the input stream and get ready for read
*/
if (HTRequest_isSource(request) && !HTRequest_destinationsReady(request))
return HT_OK;
HTRequest_addError(request, ERR_INFO, NO, HTERR_OK, NULL, 0,
"HTLoadFile");
file->state = FS_NEED_BODY;
/* If we are _not_ using preemptive mode and we are Unix fd's
** then return here to get the same effect as when we are
** connecting to a socket. That way, HTFile acts just like any
** other protocol module even though we are in fact doing
** blocking connect
*/
if (HTEvent_isCallbacksRegistered()) {
if (!HTRequest_preemptive(request)) {
if (!HTNet_preemptive(net)) {
HTTRACE(PROT_TRACE, "HTLoadFile.. Returning\n");
HTHost_register(HTNet_host(net), net, HTEvent_READ);
} else if (!file->timer) {
HTTRACE(PROT_TRACE, "HTLoadFile.. Returning\n");
file->timer =
HTTimer_new(NULL, ReturnEvent, file, 1, YES, NO);
}
return HT_OK;
}
}
} else if (status == HT_WOULD_BLOCK || status == HT_PENDING)
return HT_OK;
else {
HTRequest_addError(request, ERR_INFO, NO, HTERR_INTERNAL,
NULL, 0, "HTLoadFile");
file->state = FS_ERROR; /* Error or interrupt */
}
break;
case FS_NEED_BODY:
status = HTHost_read(HTNet_host(net), net);
if (status == HT_WOULD_BLOCK)
return HT_OK;
else if (status == HT_LOADED || status == HT_CLOSED) {
file->state = FS_GOT_DATA;
} else {
HTRequest_addError(request, ERR_INFO, NO, HTERR_FORBIDDEN,
NULL, 0, "HTLoadFile");
file->state = FS_ERROR;
}
break;
case FS_PARSE_DIR:
status = HTFile_readDir(request, file);
if (status == HT_LOADED)
file->state = FS_GOT_DATA;
else
file->state = FS_ERROR;
break;
case FS_TRY_FTP:
{
char *url = HTAnchor_physical(anchor);
HTAnchor *anchor;
char *newname = NULL;
StrAllocCopy(newname, "ftp:");
if (!strncmp(url, "file:", 5))
StrAllocCat(newname, url+5);
else
StrAllocCat(newname, url);
anchor = HTAnchor_findAddress(newname);
HTRequest_setAnchor(request, anchor);
HT_FREE(newname);
FileCleanup(request, HT_IGNORE);
return HTLoad(request, YES);
}
break;
case FS_GOT_DATA:
FileCleanup(request, HT_LOADED);
return HT_OK;
break;
case FS_NO_DATA:
FileCleanup(request, HT_NO_DATA);
return HT_OK;
break;
case FS_RETRY:
FileCleanup(request, HT_RETRY);
return HT_OK;
break;
case FS_ERROR:
FileCleanup(request, HT_ERROR);
return HT_OK;
break;
}
} /* End of while(1) */
}
/* Generate the anchor for the home page
** -------------------------------------
**
** As it involves file access, this should only be done once
** when the program first runs.
** This is a default algorithm -- browser don't HAVE to use this.
** But consistency betwen browsers is STRONGLY recommended!
**
** Priority order is:
**
** 1 WWW_HOME environment variable (logical name, etc)
** 2 ~/WWW/default.html
** 3 /usr/local/bin/default.html
** 4 http://www.w3.org/default.html
**
*/
PUBLIC HTParentAnchor * HTHomeAnchor (void)
{
char * my_home_document = NULL;
char * home = (char *) getenv(LOGICAL_DEFAULT);
char * ref;
HTParentAnchor * anchor;
/* Someone telnets in, they get a special home */
if (home) {
StrAllocCopy(my_home_document, home);
} else if (HTLib_secure()) { /* Telnet server */
FILE * fp = fopen(REMOTE_POINTER, "r");
char * status;
if (fp) {
if ((my_home_document = (char *) HT_MALLOC(HT_MAX_PATH)) == NULL)
HT_OUTOFMEM("my_home_document ");
status = fgets(my_home_document, HT_MAX_PATH, fp);
if (!status) {
HT_FREE(my_home_document);
my_home_document = NULL;
}
fclose(fp);
}
if (!my_home_document) StrAllocCopy(my_home_document, REMOTE_ADDRESS);
}
if (!my_home_document) {
FILE * fp = NULL;
char * home = (char *) getenv("HOME");
if (home) {
if ((my_home_document = (char *) HT_MALLOC(strlen(home)+1+ strlen(PERSONAL_DEFAULT)+1)) == NULL)
HT_OUTOFMEM("HTLocalName");
sprintf(my_home_document, "%s/%s", home, PERSONAL_DEFAULT);
fp = fopen(my_home_document, "r");
}
if (!fp) {
StrAllocCopy(my_home_document, LOCAL_DEFAULT_FILE);
fp = fopen(my_home_document, "r");
}
if (fp) {
fclose(fp);
} else {
HTTRACE(APP_TRACE, "Home Anchor. No local home document in ~/%s or %s\n" _
PERSONAL_DEFAULT _ LOCAL_DEFAULT_FILE);
HT_FREE(my_home_document);
my_home_document = NULL;
}
}
ref = HTParse(my_home_document ? my_home_document :
HTLib_secure() ? REMOTE_ADDRESS : LAST_RESORT, "file:",
PARSE_ACCESS|PARSE_HOST|PARSE_PATH|PARSE_PUNCTUATION);
if (my_home_document) {
HTTRACE(APP_TRACE, "Home Anchor. `%s\' used for custom home page as\n`%s\'\n" _
my_home_document _ ref);
HT_FREE(my_home_document);
}
anchor = (HTParentAnchor*) HTAnchor_findAddress(ref);
HT_FREE(ref);
return anchor;
}
/* Save Locally
** ------------
** Saves a file to local disk. This can for example be used to dump
** data objects of unknown media types to local disk. The stream prompts
** for a file name for the temporary file.
*/
PUBLIC HTStream* HTSaveLocally (HTRequest * request,
void * param,
HTFormat input_format,
HTFormat output_format,
HTStream * output_stream)
{
FILE * fp = NULL;
char * filename = NULL;
HTUserProfile * up = HTRequest_userProfile(request);
char * tmproot = HTUserProfile_tmp(up);
if (HTLib_secure()) {
HTRequest_addError(request, ERR_NON_FATAL, NO, HTERR_UNAUTHORIZED,
NULL, 0, "HTSaveLocally");
return HTErrorStream();
}
if (!tmproot) {
HTTRACE(STREAM_TRACE, "Save File... turned off\n");
return HTErrorStream();
}
/* Let's prompt the user for a file name for this file */
{
HTAlertCallback *cbf = HTAlert_find(HT_A_PROMPT);
HTParentAnchor *anchor = (HTParentAnchor *) HTRequest_anchor(request);
/*
** If we found an alert handler for prompting the user then call it.
** If not then either we are in non-interactive mode or no handler
** has been registered. For now we then return a blackhole which may
** not be the best thing to do.
*/
if (cbf) {
HTAlertPar * reply = HTAlert_newReply();
char * suffix = HTBind_getSuffix(anchor);
char * deflt = get_filename(tmproot, HTAnchor_physical(anchor), suffix, YES);
if ((*cbf)(request, HT_A_PROMPT, HT_MSG_FILENAME,deflt,NULL,reply))
filename = HTAlert_replyMessage(reply);
HTAlert_deleteReply(reply);
HT_FREE(suffix);
HT_FREE(deflt);
}
if (filename) {
if ((fp = fopen(filename, "wb")) == NULL) {
HTRequest_addError(request, ERR_NON_FATAL, NO, HTERR_NO_FILE,
filename, strlen(filename),"HTSaveLocally");
HT_FREE(filename);
return HTErrorStream();
}
} else if (cbf) {
HTTRACE(STREAM_TRACE, "Save File... No file name - error stream\n");
return HTErrorStream();
} else {
HTTRACE(STREAM_TRACE, "Save File... No file name - black hole\n");
return HTBlackHole();
}
}
/* Now we are ready for creating the file writer stream */
if (fp) {
HTStream * me = HTFileSave_new(request, fp, NO);
me->filename = filename;
return me;
}
HT_FREE(filename);
return HTErrorStream();
}