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Diffstat (limited to 'WWW/Library/Implementation/HTFinger.c')
| -rw-r--r-- | WWW/Library/Implementation/HTFinger.c | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/WWW/Library/Implementation/HTFinger.c b/WWW/Library/Implementation/HTFinger.c new file mode 100644 index 00000000..0dfc7a68 --- /dev/null +++ b/WWW/Library/Implementation/HTFinger.c @@ -0,0 +1,422 @@ +/* + * $LynxId: HTFinger.c,v 1.29 2011/05/24 09:21:13 tom Exp $ + * + * 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> + +#ifndef DISABLE_FINGER + +#include <HTAlert.h> +#include <HTML.h> +#include <HTParse.h> +#include <HTFormat.h> +#include <HTTCP.h> +#include <HTString.h> +#include <HTFinger.h> + +#include <LYUtils.h> +#include <LYLeaks.h> + +#define FINGER_PORT 79 /* See rfc742 */ +#define BIG 1024 /* Bug */ + +#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, -1, 0) +#define END(e) (*targetClass.end_element)(target, e, 0) +#define FREE_TARGET (*targetClass._free)(target) +#define NEXT_CHAR HTGetCharacter() + +/* Module-wide variables +*/ +static int finger_fd; /* Socket for FingerHost */ + +struct _HTStructured { + const HTStructuredClass *isa; /* For gopher streams */ + /* ... */ +}; + +static HTStructured *target; /* The output sink */ +static HTStructuredClass targetClass; /* Copy of fn addresses */ + +/* Initialisation for this module + * ------------------------------ + */ +static BOOL initialized = NO; +static BOOL initialize(void) +{ + finger_fd = -1; /* Disconnected */ + return YES; +} + +/* Start anchor element + * -------------------- + */ +static void start_anchor(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] = (BOOL) (i == HTML_A_HREF); + } + ((const char **) value)[HTML_A_HREF] = href; + (*targetClass.start_element) (target, HTML_A, present, + (const char **) value, -1, 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. + */ + +static int response(char *command, + char *sitename, + HTParentAnchor *anAnchor, + HTFormat format_out, + HTStream *sink) +{ + int status; + int length = (int) strlen(command); + int ch, i; + char line[BIG], *l, *cmd = NULL; + char *p = line, *href = NULL; + + if (length == 0) + return (-1); + + /* Set up buffering. + */ + HTInitInput(finger_fd); + + /* Send the command. + */ + CTRACE((tfp, "HTFinger command to be sent: %s", command)); + status = (int) NETWRITE(finger_fd, (char *) command, (unsigned) length); + if (status < 0) { + CTRACE((tfp, "HTFinger: Unable to send command. Disconnecting.\n")); + NETCLOSE(finger_fd); + finger_fd = -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. + */ + CTRACE((tfp, "HTFinger: Reading finger information\n")); + START(HTML_HTML); + PUTC('\n'); + START(HTML_HEAD); + PUTC('\n'); + START(HTML_TITLE); + PUTS("Finger server on "); + PUTS(sitename); + END(HTML_TITLE); + PUTC('\n'); + END(HTML_HEAD); + PUTC('\n'); + START(HTML_BODY); + PUTC('\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 = ((int) 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); + PUTC('\n'); + START(HTML_PRE); + + while ((ch = NEXT_CHAR) != EOF) { + + if (interrupted_in_htgetcharacter) { + CTRACE((tfp, + "HTFinger: Interrupted in HTGetCharacter, apparently.\n")); + _HTProgress(CONNECTION_INTERRUPTED); + goto end_html; + } + + if (ch != LF) { + *p = (char) 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, STR_NEWS_URL, LEN_NEWS_URL) && + 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, STR_MAILTO_URL, LEN_MAILTO_URL) && + 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(finger_fd); + finger_fd = -1; + + end_html: + END(HTML_PRE); + PUTC('\n'); + END(HTML_BODY); + PUTC('\n'); + END(HTML_HTML); + PUTC('\n'); + FREE_TARGET; + return (0); +} + +/* Load by name HTLoadFinger + * ============ + */ +int HTLoadFinger(const char *arg, + HTParentAnchor *anAnchor, + HTFormat format_out, + HTStream *stream) +{ + static char empty[1]; + + char *username, *sitename; /* Fields extracted from URL */ + char *slash, *at_sign; /* Fields extracted from URL */ + char *command, *str, *param; /* Buffers */ + int port; /* Port number from URL */ + int status; /* tcp return */ + int result = HT_LOADED; + BOOL IsGopherURL = FALSE; + const char *p1 = arg; + + CTRACE((tfp, "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(gettext("Could not set up finger connection.")); + return HT_NOT_LOADED; /* FAIL */ + } + + /* 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; + } + + param = 0; + sitename = StrAllocCopy(param, p1); + if (param == 0) { + HTAlert(COULD_NOT_LOAD_DATA); + return HT_NOT_LOADED; + } else 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 */ + } else { + *at_sign++ = '\0'; + username = sitename; + sitename = at_sign; + HTUnEscape(username); + } + } else if (slash) { + username = slash; + } else { + username = empty; + } + + if (*sitename == '\0') { + HTAlert(gettext("Could not load data (no sitename in finger URL)")); + result = HT_NOT_LOADED; /* Ignore if no name */ + } else if (HTParsePort(sitename, &port) != NULL) { + if (port != 79) { + HTAlert(gettext("Invalid port number - will only use port 79!")); + result = HT_NOT_LOADED; /* Ignore if wrong port */ + } + } + + if (result == HT_LOADED) { + /* Load the string for making a connection/ + */ + str = 0; + HTSprintf0(&str, "lose://%s/", sitename); + + /* Load the command for the finger server. + */ + command = 0; + if (at_sign && slash) { + if (*slash == 'w' || *slash == 'W') { + HTSprintf0(&command, "/w %s%c%c", username, CR, LF); + } else { + HTSprintf0(&command, "%s%c%c", username, CR, LF); + } + } else if (at_sign) { + HTSprintf0(&command, "%s%c%c", username, CR, LF); + } else if (*username == '/') { + if ((slash = strchr((username + 1), '/')) != NULL) { + *slash = ' '; + } + HTSprintf0(&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'; + } + HTSprintf0(&command, "/%s%c%c", username, CR, LF); + } else if ((*username == 'w' || *username == 'W') && + *(username + 1) == '\0') { + HTSprintf0(&command, "/%s%c%c", username, CR, LF); + } else if ((slash = strchr(username, '/')) != NULL) { + *slash++ = '\0'; + if (*slash == 'w' || *slash == 'W') { + HTSprintf0(&command, "/w %s%c%c", username, CR, LF); + } else { + HTSprintf0(&command, "%s%c%c", username, CR, LF); + } + } else { + HTSprintf0(&command, "%s%c%c", username, CR, LF); + } + + /* Now, let's get a stream setup up from the FingerHost: + * CONNECTING to finger host + */ + CTRACE((tfp, "HTFinger: doing HTDoConnect on '%s'\n", str)); + status = HTDoConnect(str, "finger", FINGER_PORT, &finger_fd); + CTRACE((tfp, "HTFinger: Done DoConnect; status %d\n", status)); + + if (status == HT_INTERRUPTED) { + /* Interrupt cleanly */ + CTRACE((tfp, + "HTFinger: Interrupted on connect; recovering cleanly.\n")); + HTProgress(CONNECTION_INTERRUPTED); + result = HT_NOT_LOADED; + } else if (status < 0) { + NETCLOSE(finger_fd); + finger_fd = -1; + CTRACE((tfp, "HTFinger: Unable to connect to finger host.\n")); + HTAlert(gettext("Could not access finger host.")); + result = HT_NOT_LOADED; /* FAIL */ + } else { + CTRACE((tfp, "HTFinger: Connected to finger host '%s'.\n", str)); + + /* Send the command, and process response if successful. + */ + if (response(command, sitename, anAnchor, format_out, stream) != 0) { + HTAlert(gettext("No response from finger server.")); + result = HT_NOT_LOADED; + } + } + FREE(str); + FREE(command); + } + FREE(param); + return result; +} + +#ifdef GLOBALDEF_IS_MACRO +#define _HTFINGER_C_1_INIT { "finger", HTLoadFinger, NULL } +GLOBALDEF(HTProtocol, HTFinger, _HTFINGER_C_1_INIT); +#else +GLOBALDEF HTProtocol HTFinger = +{"finger", HTLoadFinger, NULL}; +#endif /* GLOBALDEF_IS_MACRO */ + +#endif /* not DISABLE_FINGER */ |