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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>
- ** FM Foteos Macrides, WFEB <macrides@sci.wfeb.edu>
- **
- ** 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.
- ** May 94 FM Added DIRECT_WAIS support for VMS.
- **
- ** 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
- **
- ** Bugs fixed
- ** NT Nathan Torkington (Nathan.Torkington@vuw.ac.nz)
- **
- ** 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 "HTUtils.h"
- #include "tcp.h"
- #include "HTParse.h"
- #include "HTAccess.h" /* We implement a protocol */
- #include "HTML.h" /* The object we will generate */
- #include "HTFormat.h"
- #include "HTTCP.h"
- /* #include "HTWSRC.h" */ /* Need some bits from here */
- /* #include "ParseWSRC.h" */
-
-
- /* From WAIS
- ** ---------
- */
-
- #ifdef VMS
- #include "HTVMS_WaisUI.h"
- #include "HTVMS_WaisProt.h"
- #else
- #include <ui.h>
- #endif /* VMS */
-
- #define MAX_MESSAGE_LEN 100000
- #define CHARS_PER_PAGE 10000 /* number of chars retrieved in each request */
-
- #define WAISSEARCH_DATE "Fri Jul 19 1991"
-
-
- /* FROM WWW
- ** --------
- */
- #include "LYLeaks.h"
-
- #define DIRECTORY "/cnidr.org:210/directory-of-servers"
- /* #define DIRECTORY "/quake.think.com:210/directory-of-servers" */
-
- #define BIG 1024 /* identifier size limit @@@@@ */
-
- #define BUFFER_SIZE 4096 /* Arbitrary size for efficiency */
-
- #define HEX_ESCAPE '%'
-
- extern int WWW_TraceFlag; /* Control diagnostic output */
- extern FILE * logfile; /* Log file output */
-
- PRIVATE BOOL as_gate; /* Client is using us as gateway */
-
- PRIVATE char line[2048]; /* For building strings to display */
- /* Must be able to take id */
-
- #define PUTC(c) (*target->isa->put_character)(target, c)
- #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 FREE_TARGET (*target->isa->_free)(target)
-
- struct _HTStructured {
- CONST HTStructuredClass * isa;
- /* ... */
- };
-
- struct _HTStream {
- CONST HTStreamClass * isa;
- /* ... */
- };
-
-
- /* ------------------------------------------------------------------------ */
- /* ---------------- Local copy of connect_to_server calls ----------------- */
- /* ------------------------------------------------------------------------ */
-
- /* Returns 1 on success, 0 on fail, -1 on interrupt. */
- static int fd_mosaic_connect_to_server ARGS3(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)
- {
- if (TRACE)
- fprintf (stderr, "===WAIS=== interrupted in connect\n");
- HTAlert ("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 ARGS3(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)
- {
- HTAlert ("Could not connect to WAIS server.");
- return 0;
- }
- else if (rv == -1)
- {
- HTAlert ("Connection interrupted.");
- return -1;
- }
-
- #ifndef VMS
- if ((file = fdopen(fd,"r+")) == NULL)
- {
- HTAlert ("Could not open WAIS connection for reading.");
- return 0;
- }
-
- *fp = file;
- #else
- *fp = (FILE *)fd;
- #endif /* VMS */
- return 1;
- }
-
-
- /* ------------------------------------------------------------------------ */
- /* ------------------------------------------------------------------------ */
-
-
- /* 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 char buf[BIG];
- char * q = buf;
- char * p = (docid->bytes);
- int i, l;
- if (TRACE) {
- 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");
- }
- for (p=docid->bytes; (p<docid->bytes+docid->size) && (q<&buf[BIG]);) {
- if (TRACE) fprintf(stderr, " Record type %d, length %d\n",
- p[0], p[1]);
- if (*p>10) {
- if(TRACE)
- fprintf(stderr, "Eh? DOCID record type of %d!\n", *p);
- return 0;
- }
- { /* Bug fix -- allow any byte value 15 Apr 93 */
- unsigned int i = (unsigned) *p++;
-
- if (i > 99) {
- *q++ = (i/100) + '0';
- i = i % 100;
- }
- if (i > 9) {
- *q++ = (i/10) + '0';
- i = i % 10;
- }
- *q++ = i + '0'; /* Record type */
- }
- *q++ = '='; /* Separate */
- l = *p++; /* Length */
- for(i=0; i<l; i++, p++){
- if (!acceptable[*p]) {
- *q++ = HEX_ESCAPE; /* Means hex commming */
- *q++ = hex[(*p) >> 4];
- *q++ = hex[(*p) & 15];
- }
- else *q++ = *p;
- }
- *q++= ';'; /* Terminate field */
- }
- *q++ = 0; /* Terminate string */
- if (TRACE) fprintf(stderr, "WWW form of id: %s\n", buf);
- {
- char * result = (char *)malloc(strlen(buf)+1);
- if (!result)
- outofmem(__FILE__, "WWW_from_WAIS");
- 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 */
- if (TRACE) fprintf(stderr, "WWW id (to become WAIS id): %s\n", docname);
- 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;
- }
-
- if (!(docid->bytes = (char *) malloc(docid->size))) /* result record */
- outofmem(__FILE__, "WAIS_from_WWW");
- z = docid->bytes;
-
- for(p = docname; *p; ) { /* Convert of strings */
- /* Record type */
-
- *z = 0; /* Initialize record type */
- while (*p >= '0' && *p <= '9') {
- *z = *z*10 + (*p++ - '0'); /* Decode decimal record type */
- }
- z++;
- if (*p != '=') return 0;
- q = p;
-
- /* *z++ = *p++ - '0';
- q = strchr(p , '=');
- if (!q) return 0;
- */
- 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 */
- 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 */
- }
- }
- *sor = (z-sor-1); /* Fill in size -- not counting size itself */
- p++; /* After semicolon: start of next record */
- }
-
- if (TRACE) {
- 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");
- }
- return docid; /* Ok */
-
- } /* WAIS_from_WWW */
-
-
- /* Send a plain text record to the client output_text_record()
- ** --------------------------------------
- */
-
- PRIVATE void output_text_record ARGS4(
- HTStream *, target,
- WAISDocumentText *, record,
- boolean, quote_string_quotes,
- boolean, binary)
- {
- long count;
- /* printf(" Text\n");
- print_any(" DocumentID: ", record->DocumentID);
- printf(" VersionNumber: %d\n", record->VersionNumber);
- */
-
- if (binary) {
- (*target->isa->put_block)(target,
- record->DocumentText->bytes,
- record->DocumentText->size);
- return;
- }
-
- for(count = 0; count < record->DocumentText->size; count++){
- long ch = (unsigned char)record->DocumentText->bytes[count];
- if (ch == 27) { /* What is this in for? Tim */
-
- /* then we have an escape code */
- /* if the next letter is '(' or ')', then ignore two letters */
- if('(' == record->DocumentText->bytes[count + 1] ||
- ')' == record->DocumentText->bytes[count + 1])
- count += 1; /* it is a term marker */
- else count += 4; /* it is a paragraph marker */
- } else if (ch == '\n' || ch == '\r') {
- PUTC('\n');
- } else if ((ch=='\t') || isprint(ch)){
- PUTC(ch);
- }
- }
- } /* 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 = strstr(database, "archie")!=0; /* Specical handling */
-
- if (TRACE) fprintf(stderr, "HTWAIS: Displaying search response\n");
- 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 after each entry is its relative score, ");
- PUTS("the second is the number of lines in the item.");
- START(HTML_P);
- PUTS("\n");
- START(HTML_OL);
-
- 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.
- */
- if (TRACE) fprintf(stderr,
- "HTWAIS: %2ld: Score: %4ld, lines:%4ld '%s'\n",
- i,
- (long int)(info->DocHeaders[k]->Score),
- (long int)(info->DocHeaders[k]->Lines),
- headline);
-
- START(HTML_LI);
-
- if (archie) {
- char * www_name = WWW_from_archie(headline);
- if (www_name) {
- HTStartAnchor(target, NULL, www_name);
- PUTS(headline);
-
- END(HTML_A);
- free(www_name);
- } else {
- PUTS(headline);
- PUTS(" (bad file name)");
- }
- } else { /* Not archie */
- docname = WWW_from_WAIS(docid);
- if (docname) {
- char * dbname = HTEscape(database, URL_XPALPHAS);
- sprintf(line, "%s/%s/%d/%s", /* W3 address */
- dbname,
- head->Types ? head->Types[0] : "TEXT",
- (int)(head->DocumentLength),
- docname);
- HTStartAnchor(target, NULL, ( (head->Types)
- && (!strcmp(head->Types[0], "URL"))) ?
- headline : line); /* NT, Sep 93 */
- PUTS(headline);
- END(HTML_A);
- free(dbname);
- free(docname);
- } else {
- PUTS("(bad doc id)");
- }
- }
-
- sprintf(line, "%5ld %5ld ",
- head->Score,
- head->Lines);
- PUTS( line);
- } /* 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, 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_OL);
- PUTC('\n'); ;
- }
-
-
-
-
- /* Load by name HTLoadWAIS
- ** ============
- **
- ** This renders any object or search as required
- */
- PUBLIC int HTLoadWAIS ARGS4(
- CONST char *, arg,
- HTParentAnchor *, anAnchor,
- HTFormat, format_out,
- HTStream*, sink)
-
- #define MAX_KEYWORDS_LENGTH 1000
- #define MAX_SERVER_LENGTH 1000
- #define MAX_DATABASE_LENGTH 1000
- #define MAX_SERVICE_LENGTH 1000
- #define MAXDOCS 200
-
- {
- static CONST char * error_header =
- "<h1>Access error</h1>\nThe following error occured in accesing a WAIS server:<P>\n";
- 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 = NULL;
- char * names; /* Copy of arg to be hacked up */
- BOOL ok = NO;
- int return_status = HT_LOADED;
- int rv;
-
- extern FILE * connect_to_server();
-
- 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 (as_gate =(*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;
- 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)
- return HTLoadError(sink, 500, "Syntax error in WAIS URL");
-
- if (TRACE) fprintf(stderr, "HTWAIS: Parsed OK\n");
-
- service = strchr(names, ':');
- if (service) *service++ = 0;
- else service = "210";
-
- if (server_name[0] == 0)
- connection = NULL;
-
- else if (!(key && !*key))
- {
- int status;
- if (TRACE)
- fprintf (stderr, "===WAIS=== calling mosaic_connect_to_server\n");
- status = mosaic_connect_to_server
- (server_name, atoi(service), &connection);
- if (status == 0)
- {
- if (TRACE)
- fprintf (stderr, "===WAIS=== connection failed\n");
- free(names);
- return HT_NOT_LOADED;
- }
- else if (status == -1)
- {
- if (TRACE)
- fprintf (stderr, "===WAIS=== connection interrupted\n");
- free(names);
- return HT_INTERRUPTED;
- }
- }
-
- StrAllocCopy(wais_database,www_database);
- HTUnEscape(wais_database);
-
- /* This below fixed size stuff is terrible */
- #ifdef VMS
- if (!(request_message =
- (char*)calloc((size_t)MAX_MESSAGE_LEN*sizeof(char),1)))
- outofmem(__FILE__, "HTLoadWAIS");
- if (!(response_message =
- (char*)calloc((size_t)MAX_MESSAGE_LEN*sizeof(char),1)))
- outofmem(__FILE__, "HTLoadWAIS");
- #else
- request_message = (char*)s_malloc((size_t)MAX_MESSAGE_LEN * sizeof(char));
- response_message = (char*)s_malloc((size_t)MAX_MESSAGE_LEN * sizeof(char));
- #endif /* VMS */
-
- /* 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 */
-
- #ifdef CACHE_FILE_PREFIX
- char filename[256];
- FILE * fp;
- #endif
- HTStructured * target = HTML_new(anAnchor, format_out, sink);
-
- START(HTML_HEAD);
- PUTS("\n");
- START(HTML_ISINDEX);
- PUTS("\n");
-
- {
- START(HTML_TITLE);
- PUTS(wais_database);
- PUTS(" index");
- END(HTML_TITLE);
- PUTS("\n");
- END(HTML_HEAD);
- PUTS("\n");
-
- START(HTML_H1);
- PUTS(wais_database);
- END(HTML_H1);
- PUTS("\n");
- PUTS("This is a link for searching this index.\n");
-
- }
- /* If we have seen a source file for this database, use that:
- */
-
- #ifdef CACHE_FILE_PREFIX
- sprintf(filename, "%sWSRC-%s:%s:%.100s.txt",
- CACHE_FILE_PREFIX,
- server_name, service, www_database);
-
- fp = fopen(filename, "r"); /* Have we found this already? */
- if (TRACE) fprintf(stderr,
- "HTWAIS: Description of server %s %s.\n",
- filename,
- fp ? "exists already" : "does NOT exist!");
-
- if (fp) {
- char c;
- START(HTML_PRE); /* Preformatted description */
- while((c=getc(fp))!=EOF) PUTC(c); /* Transfer file */
- END(HTML_PRE);
- fclose(fp);
- #endif
- START(HTML_P);
- PUTS("\n");
- PUTS("Enter the 's'earch command and then specify search words.\n");
-
- 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_HEAD);
- PUTS("\n");
- START(HTML_ISINDEX);
- PUTS("\n");
- START(HTML_TITLE);
- PUTS(keywords);
- PUTS(" (in ");
- PUTS(wais_database);
- PUTS(")");
- END(HTML_TITLE);
- PUTS("\n");
- END(HTML_HEAD);
- PUTS("\n");
-
- START(HTML_H1);
- PUTS(keywords);
- END(HTML_H1);
- PUTS("\n");
-
- request_buffer_length = MAX_MESSAGE_LEN; /* Amount left */
- if (TRACE) fprintf(stderr, "HTWAIS: Search for `%s' in `%s'\n",
- keywords, wais_database);
- if(NULL ==
- generate_search_apdu(request_message + HEADER_LENGTH,
- &request_buffer_length,
- keywords, wais_database, NULL, MAXDOCS)) {
- #ifdef VMS
- HTAlert ("HTWAIS: Request too large.");
- return_status = HT_NOT_LOADED;
- FREE_TARGET;
- goto CleanUp;
- #else
- panic("request too large");
- #endif /* VMS */
- }
-
- HTProgress("Searching WAIS database...");
- rv = interpret_message (request_message,
- MAX_MESSAGE_LEN - request_buffer_length,
- response_message,
- MAX_MESSAGE_LEN,
- connection,
- false /* true verbose */
- );
-
- if (rv == HT_INTERRUPTED) {
- HTAlert ("Search interrupted.");
- return_status = HT_INTERRUPTED;
- FREE_TARGET;
- goto CleanUp;
- }
-
- else if(!rv) {
- #ifdef VMS
- HTAlert ("HTWAIS: Return message too large.");
- return_status = HT_NOT_LOADED;
- FREE_TARGET;
- goto CleanUp;
- #else
- panic("returned message too large");
- #endif /* VMS */
-
- } else { /* returned message ok */
-
- SearchResponseAPDU *query_response = 0;
- readSearchResponseAPDU(&query_response,
- response_message + HEADER_LENGTH);
- display_search_response(target,
- query_response, wais_database, keywords);
- if (query_response->DatabaseDiagnosticRecords)
- freeWAISSearchResponse(
- query_response->DatabaseDiagnosticRecords);
- freeSearchResponseAPDU( query_response);
- } /* returned message not too large */
-
- FREE_TARGET;
-
- } else { /* D O C U M E N T F E T C H */
-
- HTFormat format_in;
- boolean binary; /* how to transfer stuff coming over */
- HTStream * target;
- long count;
- any doc_chunk;
- any * docid = &doc_chunk;
- if (TRACE) fprintf(stderr,
- "HTWAIS: Retrieve document id `%s' type `%s' length %ld\n",
- docname, doctype, document_length);
-
- format_in =
- !strcmp(doctype, "WSRC") ? HTAtom_for("application/x-wais-source") :
- !strcmp(doctype, "TEXT") ? HTAtom_for("text/plain") :
- !strcmp(doctype, "HTML") ? HTAtom_for("text/html") :
- !strcmp(doctype, "GIF") ? HTAtom_for("image/gif") :
- HTAtom_for("application/octet-stream");
- binary =
- 0 != strcmp(doctype, "WSRC") &&
- 0 != strcmp(doctype, "TEXT") &&
- 0 != strcmp(doctype, "HTML") ;
-
-
- target = HTStreamStack(format_in, format_out, sink, anAnchor);
- if (!target) return HTLoadError(sink, 500,
- "Can't convert format of WAIS document");
- /* Decode hex or litteral format for document ID
- */
- WAIS_from_WWW(docid, docname);
-
-
- /* Loop over slices of the document
- */
- for(count = 0;
- count * CHARS_PER_PAGE < document_length;
- count++){
- #ifdef VMS
- char *type = NULL;
-
- StrAllocCopy(type, doctype);
- #else
- char *type = s_strdup(doctype); /* Gets freed I guess */
- #endif /* VMS */
- request_buffer_length = MAX_MESSAGE_LEN; /* Amount left */
- if (TRACE) fprintf(stderr, "HTWAIS: Slice number %ld\n", count);
-
- if(HTCheckForInterrupt())
- {
- HTAlert ("Data transfer interrupted.");
- (*target->isa->_abort)(target, NULL);
- #ifdef VMS
- if (type) free (type);
- #endif /* VMS */
- return_status = HT_NOT_LOADED;
- goto CleanUp;
- }
-
- if(0 ==
- generate_retrieval_apdu(request_message + HEADER_LENGTH,
- &request_buffer_length,
- docid,
- CT_byte,
- count * CHARS_PER_PAGE,
- ((count + 1) * CHARS_PER_PAGE <= document_length ?
- (count + 1) * CHARS_PER_PAGE :
- document_length),
- type,
- wais_database
- )) {
- #ifdef VMS
- HTAlert ("HTWAIS: Request too long.");
- return_status = HT_NOT_LOADED;
- FREE_TARGET;
- if (type) free (type);
- if (docid->bytes) free (docid->bytes);
- goto CleanUp;
- #else
- panic("request too long");
- #endif /* VMS */
- }
-
- /* Actually do the transaction given by request_message */
- HTProgress("Fetching WAIS document...");
- rv = interpret_message (request_message,
- MAX_MESSAGE_LEN - request_buffer_length,
- response_message,
- MAX_MESSAGE_LEN,
- connection,
- false /* true verbose */
- );
-
- if (rv == HT_INTERRUPTED)
- {
- HTAlert ("Data transfer interrupted.");
- return_status = HT_INTERRUPTED;
- FREE_TARGET;
- if (type) free (type);
- if (docid->bytes) free (docid->bytes);
- goto CleanUp;
- }
-
- else if (!rv)
- {
- #ifdef VMS
- HTAlert ("HTWAIS: Return message too large.");
- return_status = HT_NOT_LOADED;
- FREE_TARGET;
- if (type) free (type);
- if (docid->bytes) free (docid->bytes);
- goto CleanUp;
- #else
- panic("Returned message too large");
- #endif /* VMS */
- }
-
- /* Parse the result which came back into memory.
- */
- readSearchResponseAPDU(&retrieval_response,
- response_message + HEADER_LENGTH);
-
- if(NULL == ((WAISSearchResponse *)
- retrieval_response->DatabaseDiagnosticRecords)->Text){
- /* display_search_response(target, retrieval_response,
- wais_database, keywords); */
- PUTS("No text was returned!\n");
- /* panic("No text was returned"); */
- } else {
-
- output_text_record(target,
- ((WAISSearchResponse *)
- retrieval_response->DatabaseDiagnosticRecords)->Text[0],
- false, binary);
-
- } /* If text existed */
-
- #ifdef VMS
- if (type) free(type);
- #endif /* VMS */
- } /* Loop over slices */
-
- FREE_TARGET;
-
- if (docid->bytes) free (docid->bytes);
-
- freeWAISSearchResponse( retrieval_response->DatabaseDiagnosticRecords);
- freeSearchResponseAPDU( retrieval_response);
-
- } /* If document rather than search */
-
-
-
- CleanUp:
- /* (This postponed until later, after a timeout:)
- */
- #ifdef VMS
- if (connection != NULL) NETCLOSE((int)connection);
- #else
- if (connection) close_connection(connection);
- #endif /* VMS */
- if (wais_database) free(wais_database);
- #ifdef VMS
- if (request_message) free(request_message);
- if (response_message) free(response_message);
- #else
- s_free(request_message);
- s_free(response_message);
- #endif /* VMS */
- if (names) free(names);
- return (return_status);
- }
-
- GLOBALDEF PUBLIC HTProtocol HTWAIS = { "wais", HTLoadWAIS, NULL };
-
-
-