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/* WorldWideWeb - Wide Area Informaion Server Access HTWAIS.c
** ==================================================
**
** This module allows a WWW server or client to read data from a
** remote WAIS
** server, and provide that data to a WWW client in hypertext form.
** Source files, once retrieved, are stored and used to provide
** information about the index when that is acessed.
**
** Authors
** BK Brewster Kahle, Thinking Machines, <Brewster@think.com>
** TBL Tim Berners-Lee, CERN <timbl@info.cern.ch>
**
** History
** Sep 91 TBL adapted shell-ui.c (BK) with HTRetrieve.c from WWW.
** Feb 91 TBL Generated HTML cleaned up a bit (quotes, escaping)
** Refers to lists of sources.
** Mar 93 TBL Lib 2.0 compatible module made.
**
** Bugs
** Uses C stream i/o to read and write sockets, which won't work
** on VMS TCP systems.
**
** Should cache connections.
**
** ANSI C only as written
**
** WAIS comments:
**
** 1. Separate directories for different system's .o would help
** 2. Document ids are rather long!
**
** WWW Address mapping convention:
**
** /servername/database/type/length/document-id
**
** /servername/database?word+word+word
*/
/* WIDE AREA INFORMATION SERVER SOFTWARE:
No guarantees or restrictions. See the readme file for the full standard
disclaimer.
Brewster@think.com
*/
#include "../config.h"
#ifdef DIRECT_WAIS
#define BIG 10000
/* From WAIS
** ---------
*/
#include <ui.h>
#define MAX_MESSAGE_LEN 100000
#define CHARS_PER_PAGE 4096 /* number of chars retrieved in each request */
/* FROM WWW
** --------
*/
#define HEX_ESCAPE '%'
#include "HTUtils.h"
#include "tcp.h"
#include "HTParse.h"
#include "HTAccess.h" /* We implement a protocol */
#include "HTML.h" /* The object we will generate */
#include "HTFile.h"
#include "HTAlert.h"
/* #include "ParseWSRC.h" */
#ifndef DISABLE_TRACE
extern int www2Trace;
#endif
extern int WWW_TraceFlag; /* Control diagnostic output */
extern FILE * logfile; /* Log file output */
/*char *log_file_name = "/dev/null";*/
extern char *log_file_name; /* change for freeWAIS-0.5 - DXP */
PRIVATE char line[2048]; /* For building strings to display */
/* Must be able to take id */
#include "HTFormat.h"
#include "HTTCP.h"
/* #include "HTWSRC.h" */ /* Need some bits from here */
/* Hypertext object building machinery
*/
#include "HTML.h"
#define PUTC(c) (*target->isa->put_character)(target, c)
#define PUTBLOCK(c, len) (*target->isa->put_block)(target, c, len)
#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 END_TARGET (*target->isa->end_document)(target)
#define FREE_TARGET (*target->isa->free)(target)
struct _HTStructured {
WWW_CONST HTStructuredClass * isa;
/* ... */
};
struct _HTStream {
WWW_CONST HTStreamClass * isa;
/* ... */
};
/* showDiags
*/
/* modified from Jonny G's version in ui/question.c */
void showDiags ARGS2(
HTStream *, target,
diagnosticRecord **, d)
{
long i;
for (i = 0; d[i] != NULL; i++) {
if (d[i]->ADDINFO != NULL) {
PUTS("Diagnostic code is ");
PUTS(d[i]->DIAG);
PUTC(' ');
PUTS(d[i]->ADDINFO);
PUTC('\n'); ;
}
}
}
/* Matrix of allowed characters in filenames
** -----------------------------------------
*/
PRIVATE BOOL acceptable[256];
PRIVATE BOOL acceptable_inited = NO;
PRIVATE void init_acceptable NOARGS
{
unsigned int i;
char * good =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./-_$";
for(i=0; i<256; i++) acceptable[i] = NO;
for(;*good; good++) acceptable[(unsigned int)*good] = YES;
acceptable_inited = YES;
}
/* Transform file identifier into WWW address
** ------------------------------------------
**
**
** On exit,
** returns nil if error
** pointer to malloced string (must be freed) if ok
*/
char * WWW_from_archie ARGS1 (char *, file)
{
char * end;
char * result;
char * colon;
for(end=file; *end > ' '; end++); /* assumes ASCII encoding*/
result = (char *)malloc(10 + (end-file));
if (!result) return result; /* Malloc error */
strcpy(result, "file://");
strncat(result, file, end-file);
colon = strchr(result+7, ':'); /* Expect colon after host */
if (colon) {
for(; colon[0]; colon[0]=colon[1], colon++); /* move down */
}
return result;
} /* WWW_from_archie */
/* Transform document identifier into URL
** --------------------------------------
**
** Bugs: A static buffer of finite size is used!
** The format of the docid MUST be good!
**
** On exit,
** returns nil if error
** pointer to malloced string (must be freed) if ok
*/
PRIVATE char hex [17] = "0123456789ABCDEF";
extern char from_hex PARAMS((char a)); /* In HTWSRC @@ */
PRIVATE char * WWW_from_WAIS ARGS1(any *, docid)
{
static unsigned char buf[BIG];
char num[10];
unsigned char * q = buf;
char * p = (docid->bytes);
int i, l;
#ifndef DISABLE_TRACE
if (www2Trace)
{
char *p;
fprintf(stderr, "WAIS id (%d bytes) is ", (int)docid->size);
for (p = docid->bytes; p < docid->bytes + docid->size; p++)
{
if ((*p >= ' ') && (*p<= '~')) /* Assume ASCII! */
fprintf(stderr, "%c", *p);
else
fprintf(stderr, "<%x>", (unsigned)*p);
}
fprintf(stderr, "\n");
}
#endif
for (p = docid->bytes;
(p < docid->bytes+docid->size) &&
(q < &buf[BIG]);)
{
#ifndef DISABLE_TRACE
if (www2Trace) fprintf(stderr, " Record type %d, length %d\n",
p[0], p[1]);
#endif
sprintf(num, "%d", (int)*p);
/*
bcopy(num, q, strlen(num));
*/
memcpy(q, num, strlen(num));
q += strlen(num);
p++;
*q++ = '='; /* Separate */
l = (int)((unsigned char)*p);
p++;
if (l > 127)
{
l = (l - 128) * 128;
l = l + (int)((unsigned char)*p);
p++;
}
for (i = 0; i < l; i++, p++)
{
if (!acceptable[(unsigned char)*p])
{
*q++ = HEX_ESCAPE;
*q++ = hex[((unsigned char)*p) >> 4];
*q++ = hex[((unsigned char)*p) & 15];
}
else *q++ = (unsigned char)*p;
}
*q++= ';'; /* Terminate field */
}
*q++ = 0; /* Terminate string */
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf(stderr, "WWW form of id: %s\n", buf);
#endif
{
char * result = (char *)malloc (strlen (buf) + 1);
strcpy (result, buf);
return result;
}
} /* WWW_from_WAIS */
/* Transform URL into WAIS document identifier
** -------------------------------------------
**
** On entry,
** docname points to valid name produced originally by
** WWW_from_WAIS
** On exit,
** docid->size is valid
** docid->bytes is malloced and must later be freed.
*/
PRIVATE any * WAIS_from_WWW ARGS2 (any *, docid, char *, docname)
{
char *z; /* Output pointer */
char *sor; /* Start of record - points to size field. */
char *p; /* Input pointer */
char *q; /* Poisition of "=" */
char *s; /* Position of semicolon */
int n; /* size */
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf(stderr, "WWW id (to become WAIS id): %s\n", docname);
#endif
for(n=0, p = docname; *p; p++)
{ /* Count sizes of strings */
n++;
if (*p == ';') n--; /* Not converted */
else if (*p == HEX_ESCAPE) n=n-2; /* Save two bytes */
docid->size = n;
}
docid->bytes = (char *) malloc(docid->size + 32); /* result record */
z = docid->bytes;
for(p = docname; *p; )
{
q = strchr(p, '=');
if (!q)
return 0;
*q = '\0';
*z++ = atoi(p);
*q = '=';
s = strchr(q, ';'); /* (Check only) */
if (!s)
return 0; /* Bad! No ';'; */
sor = z; /* Remember where the size field was */
z++; /* Skip record size for now */
{
int len;
int tmp;
for(p=q+1; *p!=';' ; )
{
if (*p == HEX_ESCAPE)
{
char c;
unsigned int b;
p++;
c = *p++;
b = from_hex(c);
c = *p++;
if (!c)
break; /* Odd number of chars! */
*z++ = (b<<4) + from_hex(c);
}
else
{
*z++ = *p++; /* Record */
}
}
len = (z-sor-1);
z = sor;
if (len > 127)
{
tmp = (len / 128);
len = len - (tmp * 128);
tmp = tmp + 128;
*z++ = (char)tmp;
*z = (char)len;
}
else
{
*z = (char)len;
}
z++;
}
for(p=q+1; *p!=';' ; )
{
if (*p == HEX_ESCAPE)
{
char c;
unsigned int b;
p++;
c = *p++;
b = from_hex(c);
c = *p++;
if (!c)
break; /* Odd number of chars! */
*z++ = (b<<4) + from_hex(c);
}
else
{
*z++ = *p++; /* Record */
}
}
p++; /* After semicolon: start of next record */
}
#ifndef DISABLE_TRACE
if (www2Trace)
{
char *p;
fprintf(stderr, "WAIS id (%d bytes) is ", (int)docid->size);
for(p=docid->bytes; p<docid->bytes+docid->size; p++) {
if ((*p >= ' ') && (*p<= '~'))
fprintf(stderr, "%c", *p);
else
fprintf(stderr, "<%x>", (unsigned)*p);
}
fprintf(stderr, "\n");
}
#endif
return docid; /* Ok */
} /* WAIS_from_WWW */
/* Send a plain text record to the client output_text_record()
** --------------------------------------
*/
PRIVATE void output_text_record ARGS3(
HTStream *, target,
WAISDocumentText *, record,
boolean, quote_string_quotes)
{
if (record->DocumentText->size)
{
/* This cast should be unnecessary, as put_block should operate
on unsigned char from the start. What was he thinking??? */
PUTBLOCK((unsigned char *)record->DocumentText->bytes,
record->DocumentText->size);
}
} /* output text record */
/* Format A Search response for the client display_search_response
** ---------------------------------------
*/
/* modified from tracy shen's version in wutil.c
* displays either a text record or a set of headlines.
*/
void
display_search_response ARGS4(
HTStructured *, target,
SearchResponseAPDU *, response,
char *, database,
char *, keywords)
{
WAISSearchResponse *info;
long i, k;
BOOL archie;
if (!response)
{
PUTS("Arrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrgh!");
return;
}
archie = strstr(database, "archie")!=0; /* Specical handling */
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf(stderr, "HTWAIS: Displaying search response\n");
#endif
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "HTWAIS: database 0x%08x '%s', response 0x%08x\n",
database, database, response);
#endif
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "HTWAIS: keywords 0x%08x '%s'\n", keywords, keywords);
#endif
sprintf(line,
"Index %s contains the following %d item%s relevant to '%s'.\n",
database,
(int)(response->NumberOfRecordsReturned),
response->NumberOfRecordsReturned ==1 ? "" : "s",
keywords);
PUTS(line);
PUTS("The first figure for each entry is its relative score, ");
PUTS("the second the number of lines in the item.");
START(HTML_MENU);
if ( response->DatabaseDiagnosticRecords != 0 ) {
info = (WAISSearchResponse *)response->DatabaseDiagnosticRecords;
i =0;
if (info->Diagnostics != NULL)
showDiags((HTStream*)target, info->Diagnostics);
if ( info->DocHeaders != 0 ) {
for (k=0; info->DocHeaders[k] != 0; k++ ) {
WAISDocumentHeader* head = info->DocHeaders[k];
char * headline = trim_junk(head->Headline);
any * docid = head->DocumentID;
char * docname; /* printable version of docid */
i++;
/* Make a printable string out of the document id.
*/
#ifndef DISABLE_TRACE
if (www2Trace) fprintf(stderr,
"HTWAIS: %2ld: Score: %4ld, lines:%4ld '%s'\n",
i,
(long int)(info->DocHeaders[k]->Score),
(long int)(info->DocHeaders[k]->Lines),
headline);
#endif
START(HTML_LI);
sprintf(line, "%4ld %4ld ",
head->Score,
head->Lines);
PUTS( line);
if (archie) {
char * www_name = WWW_from_archie(headline);
if (www_name) {
PUTS ("<A HREF=\"");
PUTS (www_name);
PUTS ("\">");
PUTS(headline);
PUTS("</A>");
free(www_name);
} else {
PUTS(headline);
PUTS(" (bad file name)");
}
} else { /* Not archie */
docname = WWW_from_WAIS(docid);
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "HTWAIS: docname '%s'\n", docname);
#endif
if (docname) {
char * dbname = HTEscape(database);
char types_array[1000]; /* bad */
char *type_escaped;
types_array[0] = 0;
if (head->Types)
{
int i;
for (i = 0; head->Types[i]; i++)
{
if (i)
strcat (types_array, ",");
type_escaped = HTEscape (head->Types[i]);
strcat (types_array, type_escaped);
free (type_escaped);
}
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "Built types_array '%s'\n", types_array);
#endif
}
else
{
strcat (types_array, "TEXT");
}
sprintf(line, "%s/%s/%d/%s",
dbname,
types_array,
(int)(head->DocumentLength),
docname);
PUTS ("<A HREF=\"");
if (head->Types && head->Types[0] &&
strcmp (head->Types[0], "URL") == 0)
{
/* The real URL, maybe? */
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "HTWAIS: Using headline '%s' as URL\n",
headline);
#endif
PUTS(headline);
}
else
{
/* Our manufactured URL. */
PUTS (line);
}
PUTS ("\">");
PUTS(headline);
PUTS("</A>");
free(dbname);
free(docname);
} else {
PUTS("(bad doc id)");
}
}
} /* next document header */
} /* if there were any document headers */
if ( info->ShortHeaders != 0 ) {
k =0;
while (info->ShortHeaders[k] != 0 ) {
i++;
PUTS( "(Short Header record, can't display)");
}
}
if ( info->LongHeaders != 0 ) {
k =0;
while (info->LongHeaders[k] != 0) {
i++;
PUTS( "\nLong Header record, can't display\n");
}
}
if ( info->Text != 0 ) {
k =0;
while (info->Text[k] != 0) {
i++;
PUTS( "\nText record\n");
output_text_record((HTStream*)target, info->Text[k++], false);
}
}
if ( info->Headlines != 0 ) {
k =0;
while (info->Headlines[k] != 0) {
i++;
PUTS( "\nHeadline record, can't display\n");
/* dsply_headline_record( info->Headlines[k++]); */
}
}
if ( info->Codes != 0 ) {
k =0;
while (info->Codes[k] != 0) {
i++;
PUTS( "\nCode record, can't display\n");
/* dsply_code_record( info->Codes[k++]); */
}
}
} /* Loop: display user info */
END(HTML_MENU);
PUTC('\n'); ;
}
/* ------------------------------------------------------------------------ */
/* ---------------- Local copy of connect_to_server calls ----------------- */
/* ------------------------------------------------------------------------ */
/* Returns 1 on success, 0 on fail, -1 on interrupt. */
static int fd_mosaic_connect_to_server(char *host_name, long port, long *fd)
{
/* New version. */
char dummy[256];
int status;
sprintf (dummy, "wais://%s:%d/", host_name, port);
status = HTDoConnect (dummy, "WAIS", 210, (int *)fd);
if (status == HT_INTERRUPTED)
{
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "===WAIS=== interrupted in connect\n");
#endif
HTProgress ("Connection interrupted.");
return -1;
}
if (status < 0)
return 0;
return 1;
}
/* Returns 1 on success, 0 on fail, -1 on interrupt. */
static int mosaic_connect_to_server(char *host_name, long port, FILE **fp)
{
FILE* file;
long fd;
int rv;
rv = fd_mosaic_connect_to_server (host_name, port, &fd);
if(rv == 0)
{
HTProgress ("Could not connect to WAIS server.");
return 0;
}
else if (rv == -1)
{
HTProgress ("Connection interrupted.");
return -1;
}
if ((file = fdopen(fd,"r+")) == NULL)
{
HTProgress ("Could not open WAIS connection for reading.");
return 0;
}
*fp = file;
return 1;
}
/* ------------------------------------------------------------------------ */
/* ------------------------------------------------------------------------ */
/* Pulled in from gui.c; corresponds to Rdata.max_wais_responses. */
extern int max_wais_responses;
#define MAX_KEYWORDS_LENGTH 5000
#define MAX_SERVER_LENGTH 1000
#define MAX_DATABASE_LENGTH 1000
#define MAX_SERVICE_LENGTH 1000
#define MAXDOCS max_wais_responses
/* Load by name HTLoadWAIS
** ============
**
** This renders any object or search as required
*/
PUBLIC int HTLoadWAIS ARGS4(
WWW_CONST char *, arg,
HTParentAnchor *, anAnchor,
HTFormat, format_out,
HTStream*, sink)
{
char *key; /* pointer to keywords in URL */
char *request_message = NULL; /* arbitrary message limit */
char *response_message = NULL; /* arbitrary message limit */
long request_buffer_length; /* how of the request is left */
SearchResponseAPDU *retrieval_response = 0;
char keywords[MAX_KEYWORDS_LENGTH + 1];
char *server_name;
char *wais_database = NULL; /* name of current database */
char *www_database; /* Same name escaped */
char *service;
char *doctype;
char *doclength;
long document_length;
char *docname;
FILE *connection = 0;
char *names; /* Copy of arg to be hacked up */
BOOL ok = NO;
WAISSearchResponse *response;
diagnosticRecord **diag;
if (!acceptable_inited)
init_acceptable();
/* Decipher and check syntax of WWW address:
** ----------------------------------------
**
** First we remove the "wais:" if it was spcified. 920110
*/
names = HTParse(arg, "", PARSE_HOST | PARSE_PATH | PARSE_PUNCTUATION);
key = strchr(names, '?');
if (key)
{
char * p;
*key++ = 0; /* Split off keywords */
for (p=key; *p; p++) if (*p == '+') *p = ' ';
HTUnEscape(key);
}
if (names[0]== '/')
{
server_name = names+1;
if (*server_name == '/')
server_name++; /* Accept one or two */
www_database = strchr(server_name,'/');
if (www_database)
{
*www_database++ = 0; /* Separate database name */
doctype = strchr(www_database, '/');
if (key)
ok = YES; /* Don't need doc details */
else if (doctype)
{ /* If not search parse doc details */
*doctype++ = 0; /* Separate rest of doc address */
doclength = strchr(doctype, '/');
if(doclength)
{
*doclength++ = 0;
/* OK, now doclength should be the rest of the URL,
right??? */
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr,
"WAIS: doctype '%s', doclength\n~~~~\n%s\n~~~~\n",
doctype, doclength);
#endif
/* Multitype! */
if (strchr (doctype, ','))
{
HTStructured *target =
HTML_new(anAnchor, format_out, sink);
char *t, *oldt, *newt, *revised;
int first;
#ifndef DISABLE_TRACE
if (www2Trace)
{
fprintf (stderr,
"WAIS: Hey boss, got multitype.\n");
fprintf (stderr,
"WAIS: names is '%s'\n", names);
}
#endif
START(HTML_TITLE);
PUTS("Multiple Format Opportunity");
END(HTML_TITLE);
START(HTML_H1);
PUTS("Multiple Format Opportunity");
END(HTML_H1);
PUTS("This is a multiformat WAIS response. You may pick the format of your choice from the list that follows: <p>\n\n<ul>\n");
/* Get the first doctype. */
t = strtok (doctype, ",");
/* oldt is a copy of the first doctype,
with leading period. */
oldt = (char *)malloc (strlen (t) + 16);
sprintf (oldt, ".%s", t);
first = 1;
while (t && *t)
{
/* Got a type, as t. */
PUTS("<li> <a href=\"wais:");
PUTS(names);
PUTS("/");
PUTS(www_database);
PUTS("/");
PUTS(t);
PUTS("/");
PUTS(doclength);
PUTS("\">");
/* Unescape t in place; we don't need it anymore
after this anyway. */
HTUnEscape (t);
PUTS(t);
PUTS("</a>\n");
t = strtok (NULL, ",");
}
free (oldt);
PUTS("</ul>");
END_TARGET;
FREE_TARGET;
/* Hey, WE'RE DONE! */
free (names);
return HT_LOADED;
}
document_length = atol(doclength);
if (document_length)
{
docname=strchr(doclength, '/');
if (docname)
{
*docname++ = 0;
ok = YES; /* To avoid a goto! */
} /* if docname */
} /* if document_length valid */
} /* if doclength */
}
else
{ /* no doctype? Assume index required */
if (!key) key = "";
ok = YES;
} /* if doctype */
} /* if database */
}
if (!ok)
{
free (names);
return HT_NOT_LOADED;
}
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf(stderr, "HTWAIS: Parsed OK; type is '%s'\n", doctype);
#endif
service = strchr(names, ':');
if (service)
*service++ = 0;
else
service = "210";
if (server_name[0] == 0)
connection = NULL;
else if (!(key && !*key))
{
int status;
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "===WAIS=== calling mosaic_connect_to_server\n");
#endif
status = mosaic_connect_to_server
(server_name, atoi(service), &connection);
if (status == 0)
{
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "===WAIS=== connection failed\n");
#endif
free(names);
return HT_NOT_LOADED;
}
else if (status == -1)
{
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "===WAIS=== connection interrupted\n");
#endif
free(names);
return HT_INTERRUPTED;
}
}
StrAllocCopy(wais_database,www_database);
HTUnEscape(wais_database);
/* This below fixed size stuff is terrible */
request_message = (char*)s_malloc((size_t)MAX_MESSAGE_LEN * sizeof(char));
response_message = (char*)s_malloc((size_t)MAX_MESSAGE_LEN * sizeof(char));
/* If keyword search is performed but there are no keywords,
** the user has followed a link to the index itself. It would be
** appropriate at this point to send him the .SRC file - how?
*/
if (key && !*key)
{ /* I N D E X */
HTStructured * target = HTML_new(anAnchor, format_out, sink);
START(HTML_TITLE);
PUTS(wais_database);
PUTS(" index");
END(HTML_TITLE);
START(HTML_H1);
PUTS(wais_database);
END(HTML_H1);
START(HTML_ISINDEX);
START(HTML_P);
END_TARGET;
if (connection)
FW_close_connection(connection);
FREE_TARGET;
}
else if (key)
{ /* S E A R C H */
char *p;
HTStructured * target;
strncpy(keywords, key, MAX_KEYWORDS_LENGTH);
while(p=strchr(keywords, '+'))
*p = ' ';
/* Send advance title to get something fast to the other end */
target = HTML_new(anAnchor, format_out, sink);
START(HTML_TITLE);
PUTS(keywords);
PUTS(" (in ");
PUTS(wais_database);
PUTS(")");
END(HTML_TITLE);
START(HTML_H1);
PUTS(keywords);
END(HTML_H1);
START(HTML_ISINDEX);
request_buffer_length = MAX_MESSAGE_LEN; /* Amount left */
#ifndef DISABLE_TRACE
if (www2Trace) fprintf(stderr, "HTWAIS: Search for `%s' in `%s'\n",
keywords, wais_database);
#endif
if(NULL == generate_search_apdu(request_message + HEADER_LENGTH,
&request_buffer_length,
keywords, wais_database, NULL, MAXDOCS))
{
HTProgress ("WAIS request too large; something went wrong.");
}
if(!interpret_message(request_message,
MAX_MESSAGE_LEN - request_buffer_length,
response_message,
MAX_MESSAGE_LEN,
connection,
false /* true verbose */
))
{
HTProgress ("WAIS returned message too large; something went wrong.");
}
else
{ /* returned message ok */
SearchResponseAPDU *query_response = 0;
readSearchResponseAPDU(&query_response,
response_message + HEADER_LENGTH);
/* We do want this to be called if !query_response, to
get our cute error message. */
display_search_response(target,
query_response, wais_database, keywords);
if (query_response)
{
if (query_response->DatabaseDiagnosticRecords)
freeWAISSearchResponse(query_response->DatabaseDiagnosticRecords);
freeSearchResponseAPDU( query_response);
}
} /* returned message not too large */
END_TARGET;
if (connection)
FW_close_connection(connection);
FREE_TARGET;
}
else
{ /* D O C U M E N T F E T C H */
HTFormat format_in;
HTStream * target;
long count;
any doc_chunk;
any * docid = &doc_chunk;
if (doctype)
HTUnEscape (doctype);
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf(stderr,
"===WAIS=== Retrieve document id `%s' type `%s' length %ld\n",
docname, doctype, document_length);
#endif
{
char *tmp_doctype = strdup (doctype);
char *tmp;
for (tmp = tmp_doctype; *tmp; tmp++)
*tmp = TOLOWER (*tmp);
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr,
"===WAIS=== Doing HTAtom_exists on '%s'\n", tmp_doctype);
#endif
format_in = HTAtom_exists (tmp_doctype);
free (tmp_doctype);
}
if (!format_in)
{
char dummy[256];
HTAtom *pencoding;
int compressed;
sprintf (dummy, "foo.%s", doctype);
format_in = HTFileFormat (dummy, &pencoding,
WWW_PLAINTEXT, &compressed);
/* Assume it will always be at *least* WWW_PLAINTEXT. */
}
target = HTStreamStack(format_in, format_out, 0, sink, anAnchor);
if (!target)
{
free (names);
if (connection)
FW_close_connection(connection);
return HT_NOT_LOADED;
}
/* Decode hex or literal format for document ID
*/
WAIS_from_WWW(docid, docname);
/* Loop over slices of the document
*/
{
int bytes = 0, intr;
char line[256];
HTClearActiveIcon ();
count = 0;
while (1)
{
char *type = s_strdup(doctype); /* Gets freed I guess */
request_buffer_length = MAX_MESSAGE_LEN; /* Amount left */
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf(stderr, "HTWAIS: Slice number %ld\n", count);
#endif
intr = HTCheckActiveIcon (1);
if (intr)
{
HTProgress ("Data transfer interrupted.");
(*target->isa->handle_interrupt)(target);
free (names);
if (connection)
FW_close_connection(connection);
return HT_INTERRUPTED;
}
if(generate_retrieval_apdu
(request_message + HEADER_LENGTH,
&request_buffer_length,
docid,
CT_byte,
count * CHARS_PER_PAGE,
(count + 1) * CHARS_PER_PAGE,
type,
wais_database
) == 0)
{
HTProgress
("WAIS error condition; retrieval may be unsuccessful.");
}
free (type);
/* Actually do the transaction given by request_message */
if(0 ==
interpret_message
(request_message,
MAX_MESSAGE_LEN - request_buffer_length,
response_message,
MAX_MESSAGE_LEN,
connection,
false /* true verbose */
))
{
HTProgress ("WAIS error condition; retrieval may be unsuccessful.");
goto no_more_data;
}
/* Parse the result which came back into memory.
*/
readSearchResponseAPDU(&retrieval_response,
response_message + HEADER_LENGTH);
response =
(WAISSearchResponse *)retrieval_response->DatabaseDiagnosticRecords;
diag = response->Diagnostics;
if(NULL == response->Text)
{
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "WAIS: no more data (NULL response->Text)\n");
#endif
if (retrieval_response->DatabaseDiagnosticRecords)
freeWAISSearchResponse
(retrieval_response->DatabaseDiagnosticRecords);
freeSearchResponseAPDU (retrieval_response);
goto no_more_data;
}
else if
(((WAISSearchResponse *)
retrieval_response->DatabaseDiagnosticRecords)->Text[0]->DocumentText->size)
{
output_text_record
(target,
((WAISSearchResponse *)
retrieval_response->DatabaseDiagnosticRecords)->Text[0],
false);
} /* If text existed */
else
{
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "WAIS: no more data (fell through)\n");
#endif
if (retrieval_response->DatabaseDiagnosticRecords)
freeWAISSearchResponse
(retrieval_response->DatabaseDiagnosticRecords);
freeSearchResponseAPDU (retrieval_response);
goto no_more_data;
}
/* Slightly inaccurate for last slice. */
bytes += CHARS_PER_PAGE;
sprintf (line, "Read %d bytes of data.", bytes);
HTProgress (line);
if (diag &&
diag[0] &&
diag[0]->ADDINFO != NULL &&
!strcmp(diag[0]->DIAG, D_PresentRequestOutOfRange))
{
#ifndef DISABLE_TRACE
if (www2Trace)
fprintf (stderr, "WAIS: no more data (diag)\n");
#endif
if (retrieval_response->DatabaseDiagnosticRecords)
freeWAISSearchResponse
(retrieval_response->DatabaseDiagnosticRecords);
freeSearchResponseAPDU (retrieval_response);
goto no_more_data;
}
if (retrieval_response->DatabaseDiagnosticRecords)
freeWAISSearchResponse
(retrieval_response->DatabaseDiagnosticRecords);
freeSearchResponseAPDU (retrieval_response);
count++;
} /* Loop over slices */
} /* local variables */
no_more_data:
END_TARGET;
/* Close the connection BEFORE calling system(), which can
happen in the free method. */
if (connection)
FW_close_connection(connection);
FREE_TARGET;
free (docid->bytes);
} /* If document rather than search */
if (wais_database)
free (wais_database);
s_free (request_message);
s_free(response_message);
free(names);
return HT_LOADED;
}
PUBLIC HTProtocol HTWAIS = { "wais", HTLoadWAIS, NULL };
#endif /* DIRECT_WAIS */
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