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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:37:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:37:15 +0000 |
commit | ae5d181b854d3ccb373b6bc01b4869e44ff4d87a (patch) | |
tree | 91f59efb48c56a84cc798e012fccb667b63d3fee /WWW/Library/Implementation/HTWSRC.c | |
parent | Initial commit. (diff) | |
download | lynx-upstream/2.9.0dev.12.tar.xz lynx-upstream/2.9.0dev.12.zip |
Adding upstream version 2.9.0dev.12.upstream/2.9.0dev.12upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'WWW/Library/Implementation/HTWSRC.c')
-rw-r--r-- | WWW/Library/Implementation/HTWSRC.c | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/WWW/Library/Implementation/HTWSRC.c b/WWW/Library/Implementation/HTWSRC.c new file mode 100644 index 0000000..ba12cc7 --- /dev/null +++ b/WWW/Library/Implementation/HTWSRC.c @@ -0,0 +1,486 @@ +/* + * $LynxId: HTWSRC.c,v 1.31 2020/01/21 22:05:46 tom Exp $ + * + * Parse WAIS Source file HTWSRC.c + * ====================== + * + * This module parses a stream with WAIS source file + * format information on it and creates a structured stream. + * That structured stream is then converted into whatever. + * + * 3 June 93 Bug fix: Won't crash if no description + */ + +#define HTSTREAM_INTERNAL 1 + +#include <HTUtils.h> + +#include <HTWSRC.h> +#include <LYUtils.h> + +#include <HTML.h> +#include <HTParse.h> + +#include <LYLeaks.h> + +#define BIG 10000 /* Arbitrary limit to value length */ +#define PARAM_MAX BIG +#define CACHE_PERIOD (7*86400) /* Time to keep .src file in seconds */ + +struct _HTStructured { + const HTStructuredClass *isa; + /* ... */ +}; + +#define PUTC(c) (*me->target->isa->put_character)(me->target, c) +#define PUTS(s) (*me->target->isa->put_string)(me->target, s) +#define START(e) (*me->target->isa->start_element)(me->target, e, 0, 0, -1, 0) +#define END(e) (*me->target->isa->end_element)(me->target, e, 0) +#define MAYBE_END(e) if (HTML_dtd.tags[e].contents != SGML_EMPTY) \ + (*me->target->isa->end_element)(me->target, e, 0) + +/* Here are the parameters which can be specified in a source file +*/ +static const char *par_name[] = +{ + "version", + "ip-address", +#define PAR_IP_NAME 2 + "ip-name", +#define PAR_TCP_PORT 3 + "tcp-port", +#define PAR_DATABASE_NAME 4 + "database-name", +#define PAR_COST 5 + "cost", +#define PAR_COST_UNIT 6 + "cost-unit", +#define PAR_FREE 7 + "free", +#define PAR_MAINTAINER 8 + "maintainer", +#define PAR_DESCRIPTION 9 + "description", + "keyword-list", + "source", + "window-geometry", + "configuration", + "script", + "update-time", + "contact-at", + "last-contacted", + "confidence", + "num-docs-to-request", + "font", + "font-size", +#define PAR_UNKNOWN 22 + "unknown", + 0, /* Terminate list */ +#define PAR_COUNT 23 +}; + +enum tokenstate { + beginning, + before_tag, + colon, + before_value, + value, + bracketed_value, + quoted_value, + escape_in_quoted, + done +}; + +/* Stream Object + * ------------ + * + * The target is the structured stream down which the + * parsed results will go. + * + * all the static stuff below should go in here to make it reentrant + */ + +struct _HTStream { + const HTStreamClass *isa; + HTStructured *target; + char *par_value[PAR_COUNT]; + enum tokenstate state; + char param[BIG + 1]; + int param_number; + int param_count; +}; + +/* Decode one hex character +*/ +char from_hex(char c) +{ + return (char) ((c >= '0') && (c <= '9') ? c - '0' + : (c >= 'A') && (c <= 'F') ? c - 'A' + 10 + : (c >= 'a') && (c <= 'f') ? c - 'a' + 10 + : 0); +} + +/* State machine + * ------------- + * + * On entry, + * me->state is a valid state (see WSRC_init) + * c is the next character + * On exit, + * returns 1 Done with file + * 0 Continue. me->state is updated if necessary. + * -1 Syntax error error + */ + +/* Treat One Character + * ------------------- + */ +static void WSRCParser_put_character(HTStream *me, int c) +{ + switch (me->state) { + case beginning: + if (c == '(') + me->state = before_tag; + break; + + case before_tag: + if (c == ')') { + me->state = done; + return; /* Done with input file */ + } else if (c == ':') { + me->param_count = 0; + me->state = colon; + } /* Ignore other text */ + break; + + case colon: + if (WHITE(c)) { + me->param[me->param_count++] = 0; /* Terminate */ + for (me->param_number = 0; + par_name[me->param_number]; + me->param_number++) { + if (0 == strcmp(par_name[me->param_number], me->param)) { + break; + } + } + if (!par_name[me->param_number]) { /* Unknown field */ + CTRACE((tfp, "HTWSRC: Unknown field `%s' in source file\n", + me->param)); + me->param_number = PAR_UNKNOWN; + me->state = before_value; /* Could be better ignore */ + return; + } + me->state = before_value; + } else { + if (me->param_count < PARAM_MAX) + me->param[me->param_count++] = (char) c; + } + break; + + case before_value: + if (c == ')') { + me->state = done; + return; /* Done with input file */ + } + if (WHITE(c)) + return; /* Skip white space */ + me->param_count = 0; + if (c == '"') { + me->state = quoted_value; + } else { + me->state = ((c == '(') + ? bracketed_value + : value); + me->param[me->param_count++] = (char) c; /* Don't miss first character */ + } + break; + + case value: + if (WHITE(c)) { + me->param[me->param_count] = 0; + StrAllocCopy(me->par_value[me->param_number], me->param); + me->state = before_tag; + } else { + if (me->param_count < PARAM_MAX) + me->param[me->param_count++] = (char) c; + } + break; + + case bracketed_value: + if (c == ')') { + me->param[me->param_count] = 0; + StrAllocCopy(me->par_value[me->param_number], me->param); + me->state = before_tag; + break; + } + if (me->param_count < PARAM_MAX) + me->param[me->param_count++] = (char) c; + break; + + case quoted_value: + if (c == '"') { + me->param[me->param_count] = 0; + StrAllocCopy(me->par_value[me->param_number], me->param); + me->state = before_tag; + break; + } + + if (c == '\\') { /* Ignore escape but switch state */ + me->state = escape_in_quoted; + break; + } + /* Fall through! */ + + case escape_in_quoted: + if (me->param_count < PARAM_MAX) + me->param[me->param_count++] = (char) c; + me->state = quoted_value; + break; + + case done: /* Ignore anything after EOF */ + return; + + } /* switch me->state */ +} + +/* Open Cache file + * =============== + * + * Bugs: Maybe for filesystem-challenged platforms (MSDOS for example) we + * should make a hash code for the filename. + */ + +#ifdef CACHE_FILE_PREFIX +static BOOL write_cache(HTStream *me) +{ + FILE *fp; + char *cache_file_name = NULL; + char *www_database; + int result = NO; + + if (!me->par_value[PAR_DATABASE_NAME] + || !me->par_value[PAR_IP_NAME] + ) + return NO; + + www_database = HTEscape(me->par_value[PAR_DATABASE_NAME], URL_XALPHAS); + HTSprintf0(&cache_file_name, "%sWSRC-%s:%s:%.100s.txt", + CACHE_FILE_PREFIX, + me->par_value[PAR_IP_NAME], + (me->par_value[PAR_TCP_PORT] + ? me->par_value[PAR_TCP_PORT] + : "210"), + www_database); + + if ((fp = fopen(cache_file_name, TXT_W)) != 0) { + result = YES; + if (me->par_value[PAR_DESCRIPTION]) + fputs(me->par_value[PAR_DESCRIPTION], fp); + else + fputs("Description not available\n", fp); + fclose(fp); + } + FREE(www_database); + FREE(cache_file_name); + return result; +} +#endif + +/* Output equivalent HTML + * ---------------------- + * + */ + +static void give_parameter(HTStream *me, int p) +{ + PUTS(par_name[p]); + if (me->par_value[p]) { + PUTS(": "); + PUTS(me->par_value[p]); + PUTS("; "); + } else { + PUTS(gettext(" NOT GIVEN in source file; ")); + } +} + +/* Generate Output + * =============== + */ +static void WSRC_gen_html(HTStream *me, int source_file) +{ + if (me->par_value[PAR_DATABASE_NAME]) { + char *shortname = 0; + int l; + + StrAllocCopy(shortname, me->par_value[PAR_DATABASE_NAME]); + l = (int) strlen(shortname); + if (l > 4 && !strcasecomp(shortname + l - 4, ".src")) { + shortname[l - 4] = 0; /* Chop of .src -- boring! */ + } + + START(HTML_HEAD); + PUTC('\n'); + START(HTML_TITLE); + PUTS(shortname); + PUTS(source_file ? gettext(" WAIS source file") : INDEX_SEGMENT); + END(HTML_TITLE); + PUTC('\n'); + END(HTML_HEAD); + + START(HTML_H1); + PUTS(shortname); + PUTS(source_file ? gettext(" description") : INDEX_SEGMENT); + END(HTML_H1); + PUTC('\n'); + FREE(shortname); + } + + START(HTML_DL); /* Definition list of details */ + + if (source_file) { + START(HTML_DT); + PUTS(gettext("Access links")); + MAYBE_END(HTML_DT); + START(HTML_DD); + if (me->par_value[PAR_IP_NAME] && + me->par_value[PAR_DATABASE_NAME]) { + + char *WSRC_address = NULL; + char *www_database; + + www_database = HTEscape(me->par_value[PAR_DATABASE_NAME], + URL_XALPHAS); + HTSprintf0(&WSRC_address, "%s//%s%s%s/%s", + STR_WAIS_URL, + me->par_value[PAR_IP_NAME], + me->par_value[PAR_TCP_PORT] ? ":" : "", + (me->par_value[PAR_TCP_PORT] + ? me->par_value[PAR_TCP_PORT] + : ""), + www_database); + + HTStartAnchor(me->target, NULL, WSRC_address); + PUTS(gettext("Direct access")); + END(HTML_A); + /** Proxy will be used if defined, so let user know that - FM **/ + PUTS(gettext(" (or via proxy server, if defined)")); + + FREE(www_database); + FREE(WSRC_address); + + } else { + give_parameter(me, PAR_IP_NAME); + give_parameter(me, PAR_DATABASE_NAME); + } + MAYBE_END(HTML_DD); + + } + /* end if source_file */ + if (me->par_value[PAR_MAINTAINER]) { + START(HTML_DT); + PUTS(gettext("Maintainer")); + MAYBE_END(HTML_DT); + START(HTML_DD); + PUTS(me->par_value[PAR_MAINTAINER]); + MAYBE_END(HTML_DD); + } + if (me->par_value[PAR_IP_NAME]) { + START(HTML_DT); + PUTS(gettext("Host")); + MAYBE_END(HTML_DT); + START(HTML_DD); + PUTS(me->par_value[PAR_IP_NAME]); + MAYBE_END(HTML_DD); + } + + END(HTML_DL); + + if (me->par_value[PAR_DESCRIPTION]) { + START(HTML_PRE); /* Preformatted description */ + PUTS(me->par_value[PAR_DESCRIPTION]); + END(HTML_PRE); + } + + (*me->target->isa->_free) (me->target); + + return; +} /* generate html */ + +static void WSRCParser_put_string(HTStream *context, const char *str) +{ + const char *p; + + for (p = str; *p; p++) + WSRCParser_put_character(context, *p); +} + +static void WSRCParser_write(HTStream *context, const char *str, + int l) +{ + const char *p; + const char *e = str + l; + + for (p = str; p < e; p++) + WSRCParser_put_character(context, *p); +} + +static void WSRCParser_free(HTStream *me) +{ + WSRC_gen_html(me, YES); +#ifdef CACHE_FILE_PREFIX + write_cache(me); +#endif + { + int p; + + for (p = 0; par_name[p]; p++) { /* Clear out old values */ + FREE(me->par_value[p]); + } + } + FREE(me); +} + +static void WSRCParser_abort(HTStream *me, HTError e GCC_UNUSED) +{ + WSRCParser_free(me); +} + +/* Stream subclass -- method routines + * --------------- + */ + +static HTStreamClass WSRCParserClass = +{ + "WSRCParser", + WSRCParser_free, + WSRCParser_abort, + WSRCParser_put_character, + WSRCParser_put_string, + WSRCParser_write +}; + +/* Converter from WAIS Source to whatever + * -------------------------------------- + */ +HTStream *HTWSRCConvert(HTPresentation *pres, HTParentAnchor *anchor, + HTStream *sink) +{ + HTStream *me = (HTStream *) malloc(sizeof(*me)); + + if (!me) + outofmem(__FILE__, "HTWSRCConvert"); + + me->isa = &WSRCParserClass; + me->target = HTML_new(anchor, pres->rep_out, sink); + + { + int p; + + for (p = 0; p < PAR_COUNT; p++) { /* Clear out parameter values */ + me->par_value[p] = 0; + } + } + me->state = beginning; + + return me; +} |