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/* FINGER ACCESS HTFinger.c
** =============
** Authors:
** ARB Andrew Brooks
**
** History:
** 21 Apr 94 First version (ARB, from HTNews.c by TBL)
** 12 Mar 96 Made the URL and command buffering secure from
** stack modifications, beautified the HTLoadFinger()
** and response() functions, and added support for the
** following URL formats for sending a "", "/w",
** "username[@host]", or "/w username[@host]" command
** to the server:
** finger://host
** finger://host/
** finger://host/%2fw
** finger://host/%2fw%20username[@host]
** finger://host/w/username[@host]
** finger://host/username[@host]
** finger://host/username[@host]/w
** finger://username@host
** finger://username@host/
** finger://username@host/w
** 15 Mar 96 Added support for port 79 gtype 0 gopher URLs
** relayed from HTLoadGopher. - FM
*/
#include "HTUtils.h"
#include "tcp.h"
#include "HTAlert.h"
#include "HTML.h"
#include "HTParse.h"
#include "HTFormat.h"
#include "HTTCP.h"
#include "HTString.h"
#include "HTFinger.h"
#include "LYLeaks.h"
/* #define TRACE 1 */
#define FINGER_PORT 79 /* See rfc742 */
#define BIG 1024 /* Bug */
#define FREE(x) if (x) {free(x); x = NULL;}
#define PUTC(c) (*targetClass.put_character)(target, c)
#define PUTS(s) (*targetClass.put_string)(target, s)
#define START(e) (*targetClass.start_element)(target, e, 0, 0, 0)
#define END(e) (*targetClass.end_element)(target, e, 0)
#define FREE_TARGET (*targetClass._free)(target)
#define NEXT_CHAR HTGetCharacter()
/* Module-wide variables
*/
PRIVATE int s; /* Socket for FingerHost */
struct _HTStructured {
CONST HTStructuredClass * isa; /* For gopher streams */
/* ... */
};
PRIVATE HTStructured * target; /* The output sink */
PRIVATE HTStructuredClass targetClass; /* Copy of fn addresses */
/* Initialisation for this module
** ------------------------------
*/
PRIVATE BOOL initialized = NO;
PRIVATE BOOL initialize NOARGS
{
s = -1; /* Disconnected */
return YES;
}
/* Start anchor element
** --------------------
*/
PRIVATE void start_anchor ARGS1(CONST char *, href)
{
BOOL present[HTML_A_ATTRIBUTES];
CONST char* value[HTML_A_ATTRIBUTES];
{
int i;
for(i=0; i<HTML_A_ATTRIBUTES; i++)
present[i] = (i==HTML_A_HREF);
}
((CONST char **)value)[HTML_A_HREF] = href;
(*targetClass.start_element)(target, HTML_A, present,
(CONST char **)value, 0);
}
/* Send Finger Command line to remote host & Check Response
** --------------------------------------------------------
**
** On entry,
** command points to the command to be sent, including CRLF, or is null
** pointer if no command to be sent.
** On exit,
** Negative status indicates transmission error, socket closed.
** Positive status is a Finger status.
*/
PRIVATE int response ARGS5(
CONST char *, command,
char *, sitename,
HTParentAnchor *, anAnchor,
HTFormat, format_out,
HTStream*, sink)
{
int status;
int length = strlen(command);
int ch, i;
char line[BIG], *l, *cmd=NULL;
char *p = line, *href=NULL;
extern int interrupted_in_htgetcharacter;
if (length == 0)
return(-1);
/* Set up buffering.
*/
HTInitInput(s);
/* Send the command.
*/
if (TRACE)
fprintf(stderr, "HTFinger command to be sent: %s", command);
status = NETWRITE(s, (char *)command, length);
if (status < 0) {
if (TRACE)
fprintf(stderr,
"HTFinger: Unable to send command. Disconnecting.\n");
NETCLOSE(s);
s = -1;
return status;
} /* if bad status */
/* Make a hypertext object with an anchor list.
*/
target = HTML_new(anAnchor, format_out, sink);
targetClass = *target->isa; /* Copy routine entry points */
/* Create the results report.
*/
if (TRACE)
fprintf(stderr,"HTFinger: Reading finger information\n");
START(HTML_HTML);
PUTS("\n");
START(HTML_HEAD);
PUTS("\n");
START(HTML_TITLE);
PUTS("Finger server on ");
PUTS(sitename);
END(HTML_TITLE);
PUTS("\n");
END(HTML_HEAD);
PUTS("\n");
START(HTML_BODY);
PUTS("\n");
START(HTML_H1);
PUTS("Finger server on ");
START(HTML_EM);
PUTS(sitename);
END(HTML_EM);
PUTS(": ");
if (command) {
StrAllocCopy(cmd, command);
} else {
StrAllocCopy(cmd, "");
}
for (i = (strlen(cmd) - 1); i >= 0; i--) {
if (cmd[i] == LF || cmd[i] == CR) {
cmd[i] = '\0';
} else {
break;
}
}
PUTS(cmd);
FREE(cmd);
END(HTML_H1);
PUTS("\n");
START(HTML_PRE);
while ((ch=NEXT_CHAR) != (char)EOF) {
if (interrupted_in_htgetcharacter) {
if (TRACE) {
fprintf(stderr,
"HTFinger: Interrupted in HTGetCharacter, apparently.\n");
}
_HTProgress ("Connection interrupted.");
goto end_html;
}
if (ch != LF) {
*p = ch; /* Put character in line */
if (p < &line[BIG-1]) {
p++;
}
} else {
*p = '\0'; /* Terminate line */
/*
* OK we now have a line.
* Load it as 'l' and parse it.
*/
p = l = line;
while (*l) {
if (strncmp(l, "news:", 5) &&
strncmp(l, "snews://", 8) &&
strncmp(l, "nntp://", 7) &&
strncmp(l, "snewspost:", 10) &&
strncmp(l, "snewsreply:", 11) &&
strncmp(l, "newspost:", 9) &&
strncmp(l, "newsreply:", 10) &&
strncmp(l, "ftp://", 6) &&
strncmp(l, "file:/", 6) &&
strncmp(l, "finger://", 9) &&
strncmp(l, "http://", 7) &&
strncmp(l, "https://", 8) &&
strncmp(l, "wais://", 7) &&
strncmp(l, "mailto:", 7) &&
strncmp(l, "cso://", 6) &&
strncmp(l, "gopher://", 9))
PUTC(*l++);
else {
StrAllocCopy(href, l);
start_anchor(strtok(href, " \r\n\t,>)\""));
while (*l && !strchr(" \r\n\t,>)\"", *l))
PUTC(*l++);
END(HTML_A);
FREE(href);
}
}
PUTC('\n');
}
}
NETCLOSE(s);
s = -1;
end_html:
END(HTML_PRE);
PUTS("\n");
END(HTML_BODY);
PUTS("\n");
END(HTML_HTML);
PUTS("\n");
FREE_TARGET;
return(0);
}
/* Load by name HTLoadFinger
** ============
*/
PUBLIC int HTLoadFinger ARGS4(
CONST char *, arg,
HTParentAnchor *, anAnchor,
HTFormat, format_out,
HTStream*, stream)
{
char *username, *sitename, *colon; /* Fields extracted from URL */
char *slash, *at_sign; /* Fields extracted from URL */
char *command, *str; /* Buffers */
int port; /* Port number from URL */
int status; /* tcp return */
if (TRACE) {
fprintf(stderr, "HTFinger: Looking for %s\n", (arg ? arg : "NULL"));
}
if (!(arg && *arg)) {
HTAlert("Could not load data.");
return HT_NOT_LOADED; /* Ignore if no name */
}
if (!initialized)
initialized = initialize();
if (!initialized) {
HTAlert ("Could not set up finger connection.");
return HT_NOT_LOADED; /* FAIL */
}
{
CONST char * p1=arg;
BOOL IsGopherURL = FALSE;
/* Set up the host and command fields.
*/
if (!strncasecomp(arg, "finger://", 9)) {
p1 = arg + 9; /* Skip "finger://" prefix */
} else if (!strncasecomp(arg, "gopher://", 9)) {
p1 = arg + 9; /* Skip "gopher://" prefix */
IsGopherURL = TRUE;
}
sitename = (char *)p1;
if ((slash = strchr(sitename, '/')) != NULL) {
*slash++ = '\0';
HTUnEscape(slash);
if (IsGopherURL) {
if (*slash != '0') {
HTAlert("Could not load data.");
return HT_NOT_LOADED; /* FAIL */
}
*slash++ = '\0';
}
}
if ((at_sign = strchr(sitename, '@')) != NULL) {
if (IsGopherURL) {
HTAlert("Could not load data.");
return HT_NOT_LOADED; /* FAIL */
}
*at_sign++ = '\0';
username = sitename;
sitename = at_sign;
HTUnEscape(username);
} else if (slash) {
username = slash;
} else {
username = "";
}
if (*sitename == '\0') {
HTAlert("Could not load data (no sitename in finger URL)");
return HT_NOT_LOADED; /* Ignore if no name */
}
if ((colon = strchr(sitename, ':')) != NULL) {
*colon++ = '\0';
port = atoi(colon);
if (port != 79) {
HTAlert("Invalid port number - will only use port 79!");
return HT_NOT_LOADED; /* Ignore if wrong port */
}
}
/* Load the string for making a connection/
*/
str = (char *)calloc(1, (strlen(sitename) + 10));
if (str == NULL)
outofmem(__FILE__, "HTLoadFinger");
sprintf(str, "lose://%s/", sitename);
/* Load the command for the finger server.
*/
command = (char *)calloc(1, (strlen(username) + 10));
if (command == NULL)
outofmem(__FILE__, "HTLoadFinger");
if (at_sign && slash) {
if (*slash == 'w' || *slash == 'W') {
sprintf(command, "/w %s%c%c", username, CR, LF);
} else {
sprintf(command, "%s%c%c", username, CR, LF);
}
} else if (at_sign) {
sprintf(command, "%s%c%c", username, CR, LF);
} else if (*username == '/') {
if ((slash = strchr((username+1), '/')) != NULL) {
*slash = ' ';
}
sprintf(command, "%s%c%c", username, CR, LF);
} else if ((*username == 'w' || *username == 'W') &&
*(username+1) == '/') {
if (*username+2 != '\0') {
*(username+1) = ' ';
} else {
*(username+1) = '\0';
}
sprintf(command, "/%s%c%c", username, CR, LF);
} else if ((*username == 'w' || *username == 'W') &&
*(username+1) == '\0') {
sprintf(command, "/%s%c%c", username, CR, LF);
} else if ((slash = strchr(username, '/')) != NULL) {
*slash++ = '\0';
if (*slash == 'w' || *slash == 'W') {
sprintf(command, "/w %s%c%c", username, CR, LF);
} else {
sprintf(command, "%s%c%c", username, CR, LF);
}
} else {
sprintf(command, "%s%c%c", username, CR, LF);
}
} /* scope of p1 */
/* Now, let's get a stream setup up from the FingerHost:
** CONNECTING to finger host
*/
if (TRACE)
fprintf(stderr, "HTFinger: doing HTDoConnect on '%s'\n", str);
status = HTDoConnect(str, "finger", FINGER_PORT, &s);
if (TRACE)
fprintf(stderr, "HTFinger: Done DoConnect; status %d\n", status);
if (status == HT_INTERRUPTED) {
/* Interrupt cleanly */
if (TRACE)
fprintf(stderr,
"HTFinger: Interrupted on connect; recovering cleanly.\n");
HTProgress ("Connection interrupted.");
FREE(str);
FREE(command);
return HT_NOT_LOADED;
}
if (status < 0) {
NETCLOSE(s);
s = -1;
if (TRACE)
fprintf(stderr, "HTFinger: Unable to connect to finger host.\n");
HTAlert("Could not access finger host.");
FREE(str);
FREE(command);
return HT_NOT_LOADED; /* FAIL */
}
if (TRACE)
fprintf(stderr, "HTFinger: Connected to finger host '%s'.\n", str);
FREE(str);
/* Send the command, and process response if successful.
*/
if (response(command, sitename, anAnchor, format_out, stream) != 0) {
HTAlert("No response from finger server.");
FREE(command);
return HT_NOT_LOADED;
}
FREE(command);
return HT_LOADED;
}
#ifdef GLOBALDEF_IS_MACRO
#define _HTFINGER_C_1_INIT { "finger", HTLoadFinger, NULL }
GLOBALDEF (HTProtocol, HTFinger, _HTFINGER_C_1_INIT);
#else
GLOBALDEF PUBLIC HTProtocol HTFinger = { "finger", HTLoadFinger, NULL };
#endif /* GLOBALDEF_IS_MACRO */
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