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// This is a roxen module. Copyright © 1997 - 2009, Roxen IS. 
 
// A WAIS proxy module, not written by anyone at Roxen IS, and it would 
// seem that I have forgotten who wrote it. 
 
 
string cvs_version = "$Id$"; 
 
#include <config.h> 
#include <module.h> 
 
#define DEF_CONNECTION_REFUSED "HTTP/1.0 500 Connection refused by remote host\r\nContent-type: text/html\r\n\r\n<title>Roxen error: Connection refused</title>\n<h1>Proxy request failed</h1><hr><font size=+2><i>Connection refused by remote host</i></font><hr><font size=-2><a href=http://www.roxen.com/>Roxen</a></font>" 
#define CONNECTION_REFUSED   query("ConnRefuse") 
 
 
// #define WAIS_DEBUG    //define this to have lot of debug 
// #define WAIS_DEBUG_2  //define this to have an insane level of debug 
 
#ifdef WAIS_DEBUG_2 
# define WAIS_DEBUG 
# define WAIS_WERR_2(X) werror("WAIS: "+X+"\n"); 
#else 
# define WAIS_WERR_2(X) 
#endif 
 
#ifdef WAIS_DEBUG 
# define WAIS_WERR(X) werror("WAIS: "+X+"\n"); 
#else 
# define WAIS_WERR(X) 
#endif 
 
 
#define bitsPerByte       8 
#define HEADER_LEN      2 
#define BINARY_INTEGER_BYTES      4 
 
#define UNUSED        -1 
 
 
#define HEADER_LENGTH         25      /* number of bytes needed to write a wais-header (not sizeof(wais_header)) */ 
 
#define HEADER_VERSION        "2" 
 
/* message type */ 
#define Z3950         "z" 
#define ACK         "a" 
#define     NAK             "n" 
 
/* compression */ 
#define NO_COMPRESSION                " " 
#define UNIX_COMPRESSION    "u" 
 
/* encoding */ 
#define NO_ENCODING   " " 
#define HEX_ENCODING        "h"  /* Swartz 4/3 encoding */ 
#define IBM_HEXCODING       "i"  /* same as h but uses characters acceptable for IBM mainframes */ 
#define UUENCODE    "u" 
 
 
 
 
#define DB_DELIMITER  "\037"  /* hex 1F occurs between each database name */ 
#define ES_DELIMITER_1      "\037"  /* separates database name from element name */ 
#define ES_DELIMITER_2      "\036"  /* hex 1E separates <db,es> groups from one another */ 
 
 
#define QT_BooleanQuery                       "1"             /* standard boolean query */ 
#define QT_RelevanceFeedbackQuery   "3" 
#define QT_TextRetrievalQuery               QT_BooleanQuery 
 
 
#define IGNORE                                "ig" 
 
/* use value codes */ 
#define       UV_ISBN                         "ub" 
#define     CORPORATE_NAME                  "uc" 
#define     ISSN                            "us" 
#define     PERSONAL_NAME                   "up" 
#define     SUBJECT                         "uj" 
#define     TITLE                           "ut" 
#define     GEOGRAPHIC_NAME                 "ug" 
#define     CODEN                           "ud" 
#define     SUBJECT_SUBDIVISION             "ue" 
#define     SERIES_TITLE                    "uf" 
#define     MICROFORM_GENERATION            "uh" 
#define     PLACE_OF_PUBLICATION            "ui" 
#define     NUC_CODE                        "uk" 
#define     LANGUAGE                        "ul" 
#define     COMBINATION_OF_USE_VALUES       "um" 
#define     SYSTEM_CONTROL_NUMBER           "un" 
#define     DATE                            "uo" 
#define     LC_CONTROL_NUMBER               "ur" 
#define     MUSIC_PUBLISHERS_NUMBER         "uu" 
#define     GOVERNMENT_DOCUMENTS_NUMBER     "uv" 
#define     SUBJECT_CLASSIFICATION          "uw" 
#define     RECORD_TYPE                     "uy" 
 
#define DATA_TYPE                       "wt" 
#define BYTE                            "wb" 
 
/* relation value codes */ 
#define       EQUAL                   "re" 
#define     GREATER_THAN            "rg" 
#define     GREATER_THAN_OR_EQUAL   "ro" 
#define     LESS_THAN               "rl" 
#define     LESS_THAN_OR_EQUAL      "rp" 
#define     NOT_EQUAL               "rn" 
 
/* position value codes */ 
#define       FIRST_IN_FIELD          "pf" 
#define     FIRST_IN_SUBFIELD       "ps" 
#define     FIRST_IN_A_SUBFIELD     "pa" 
#define     FIRST_IN_NOT_A_SUBFIELD "pt" 
#define     ANY_POSITION_IN_FIELD   "py" 
 
/* structure value codes */ 
#define       PHRASE                  "sp" 
#define     WORD                    "sw" 
#define     KEY                     "sk" 
#define     WORD_LIST               "sl" 
 
/* truncation value codes */ 
#define       NO_TRUNCATION                   "tn" 
#define     RIGHT_TRUNCATION                "tr" 
#define     PROC_NUM_INCLUDED_IN_SEARCH_ARG "ti" 
 
/* completeness value codes */ 
#define       INCOMPLETE_SUBFIELD     "ci" 
#define     COMPLETE_SUBFIELD       "cs" 
#define     COMPLETEFIELD           "cf" 
 
/* operator codes */ 
#define AND   "a" 
#define OR  "o" 
#define AND_NOT     "n" 
 
/* term types */ 
#define TT_Attribute          1 
#define     TT_ResultSetID          2 
#define     TT_Operator             3 
 
#define ATTRIBUTE_SIZE          3 
#define OPERATOR_SIZE               2 
#define AT_DELIMITER            " " 
 
 
#define       initAPDU                        20 
#define     initResponseAPDU                21 
#define     searchAPDU                      22 
#define     searchResponseAPDU              23 
#define     presentAPDU                     24 
#define     presentResponseAPDU             25 
#define     deteteAPDU                      26 
#define     deleteResponseAPDU              27 
#define     accessControlAPDU               28 
#define     accessControlResponseAPDU       29 
#define     resourceControlAPDU             30 
#define     resourceControlResponseAPDU     31 
 
 
 
#define DT_PDUType                    1        
#define     DT_ReferenceID                  2 
#define     DT_ProtocolVersion              3 
#define     DT_Options                      4 
#define     DT_PreferredMessageSize         5 
#define     DT_MaximumRecordSize            6 
#define     DT_IDAuthentication             7 
#define     DT_ImplementationID             8 
#define     DT_ImplementationName           9 
#define     DT_ImplementationVersion        10 
#define     DT_UserInformationField         11 
#define     DT_Result                       12 
#define     DT_SmallSetUpperBound           13 
#define     DT_LargeSetLowerBound           14 
#define     DT_MediumSetPresentNumber       15 
#define     DT_ReplaceIndicator             16 
#define     DT_ResultSetName                17 
#define     DT_DatabaseNames                18 
#define     DT_ElementSetNames              19 
#define     DT_QueryType                    20 
#define     DT_Query                        21 
#define     DT_SearchStatus                 22 
#define     DT_ResultCount                  23 
#define     DT_NumberOfRecordsReturned      24 
#define     DT_NextResultSetPosition        25 
#define     DT_ResultSetStatus              26 
#define     DT_PresentStatus                27 
#define     DT_DatabaseDiagnosticRecords    28 
#define     DT_NumberOfRecordsRequested     29 
#define     DT_ResultSetStartPosition       30 
#define     DT_ResultSetID                  31 
#define     DT_DeleteOperation              32 
#define     DT_DeleteStatus                 33 
#define     DT_NumberNotDeleted             34 
#define     DT_BulkStatuses                 35 
#define     DT_DeleteMSG                    36 
#define     DT_SecurityChallenge            37 
#define     DT_SecurityChallengeResponse    38 
#define     DT_SuspendedFlag                39 
#define     DT_ResourceReport               40 
#define     DT_PartialResultsAvailable      41 
#define     DT_ContinueFlag                 42 
#define     DT_ResultSetWanted              43 
#define     DT_AttributeList                44 
#define DT_Term                             45 
#define DT_Operator                 46 
 
#define DT_UserInformationLength      99 
#define     DT_ChunkCode                    100 
#define     DT_ChunkIDLength                101 
#define     DT_ChunkMarker                  102 
#define     DT_HighlightMarker              103 
#define     DT_DeHighlightMarker            104 
#define     DT_NewlineCharacters            105 
#define     DT_SeedWords                    106 
#define     DT_DocumentIDChunk              107 
#define     DT_ChunkStartID                 108 
#define     DT_ChunkEndID                   109 
#define     DT_TextList                     110 
#define     DT_DateFactor                   111 
#define     DT_BeginDateRange               112 
#define     DT_EndDateRange                 113 
#define     DT_MaxDocumentsRetrieved        114 
#define     DT_SeedWordsUsed                115 
#define     DT_DocumentID                   116 
#define     DT_VersionNumber                117 
#define     DT_Score                        118 
#define     DT_BestMatch                    119 
#define     DT_DocumentLength               120 
#define     DT_Source                       121 
#define     DT_Date                         122 
#define     DT_Headline                     123 
#define     DT_OriginCity                   124 
#define     DT_PresentStartByte             125 
#define     DT_TextLength                   126 
#define     DT_DocumentText                 127 
#define     DT_StockCodes                   128 
#define     DT_CompanyCodes                 129 
#define     DT_IndustryCodes                130 
 
/* added by harry */ 
#define DT_DocumentHeaderGroup                150 
#define DT_DocumentShortHeaderGroup 151 
#define DT_DocumentLongHeaderGroup  152 
#define DT_DocumentTextGroup                153 
#define DT_DocumentHeadlineGroup    154 
#define DT_DocumentCodeGroup                155 
#define DT_Lines                    131 
#define     DT_TYPE_BLOCK                   132 
#define DT_TYPE                             133 
 
 
#define ES_DocumentHeader     "Document Header" 
#define ES_DocumentShortHeader      "Document Short Header" 
#define ES_DocumentLongHeader       "Document Long Header" 
#define ES_DocumentText             "Document Text" 
#define ES_DocumentHeadline "Document Headline" 
#define ES_DocumentCodes    "Document Codes" 
 
#define continueBit   128 
#define dataMask    127 
#define dataBits    7 
#define CompressedInt1Byte  128             /* 2 ^ 7 */ 
#define CompressedInt2Byte  16384           /* 2 ^ 14 */ 
#define CompressedInt3Byte  2097152         /* 2 ^ 21 */ 
 
 
inherit "module"; 
inherit "socket"; 
 
#include <proxyauth.pike> 
 
 
 
string debug_print_string(string str) 
{ 
  int i; 
  string out,t; 
 
  out=""; 
  for(i=0;i<sizeof(str); i++) { 
    t=str[i..i]; 
    if(search("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./-_$:;,\"",t)==-1) { 
      out += sprintf("<%d>",t[0]); 
    } else 
      out += t; 
  } 
  return out; 
} 
 
 
 
string trim_junk(string headline) 
{ 
  int i; 
 
  WAIS_WERR_2("trim_junk1("+debug_print_string(headline)); 
 
  headline = replace(headline, ({ "\033(", "\033)"}) , ({"",""})); 
 
  WAIS_WERR_2("trim_junk2("+debug_print_string(headline)); 
 
  while((i=search(headline,"\033"))!=-1) 
    headline=headline[0..i]+headline[i+4..]; 
 
  WAIS_WERR_2("trim_junk3("+debug_print_string(headline)); 
 
  while(strlen(headline)>0 && headline[0]==' ') 
    headline=headline[1..]; 
 
  WAIS_WERR_2("trim_junk4("+debug_print_string(headline)); 
 
/*  headline=headline/"\n"; 
 
 WAIS_WERR("trim_junk5("+debug_print_string(headline)); 
*/ 
 
  return headline; 
} 
 
 
constant module_type = MODULE_LOCATION|MODULE_PROXY; 
constant module_name = "Wais Gateway"; 
constant module_doc  = "This is a caching wais gateway, useful for firewall sites." 
  " It has not been maintained for quite a while, but it works"; 
 
string query_location() { return query("loc"); } 
 
void create() 
{ 
  defvar("loc", "wais:/", "Location", TYPE_LOCATION, 
         "The mountpoint of the wais gateway"); 
  defvar("cache", 0, "Cache wais files", TYPE_FLAG, 
         "This will enable the cacheing of wais files; actually cacheing " 
         "is experimental."); 
  defvar("ConnRefuse", DEF_CONNECTION_REFUSED, 
         "Connection Refused message", TYPE_TEXT_FIELD, 
         "Here you can set the HTML file returned to report a connection" 
         "refused error to the gateway user."); 
} 
 
 
 
 
int getCompressedBinIntSize(int num) 
{ 
  if (num < 0) 
    return(4); 
  else if (num < 256)           /* 2**8 */ 
    return(1); 
  else if (num < 65536) /* 2**16 */ 
    return(2); 
  else if (num < 16777216)      /* 2**24 */ 
    return(3); 
  else 
    return(4); 
} 
 
 
string writeCompressedInteger(int num) 
{ 
  string buf; 
 
  if (num < CompressedInt1Byte) { 
    buf=sprintf("%c",num&dataMask); 
  } 
  else if (num < CompressedInt2Byte) { 
    buf=sprintf("%c%c",((num>>(dataBits))&dataMask)|continueBit,num&dataMask); 
  } 
  else if (num < CompressedInt3Byte) { 
    buf=sprintf("%c%c%c",((num>>(dataBits*2))&dataMask)|continueBit, 
                ((num>>(dataBits))&dataMask)|continueBit,num&dataMask); 
  } 
  else { 
    buf=sprintf("%c%c%c%c",((num>>(dataBits*3))&dataMask)|continueBit, 
                ((num>>(dataBits*2))&dataMask)|continueBit, 
                ((num>>(dataBits))&dataMask)|continueBit,num&dataMask); 
  } 
 
  return buf; 
} 
 
string writeString(string s,int tag) 
{ 
  string buf; 
 
  buf = writeCompressedInteger(tag); 
  buf += writeCompressedInteger(strlen(s)); 
  buf += s; 
 
  return buf; 
} 
 
 
string writeBinaryInteger(int num,int size) 
{ 
  string buf; 
 
  switch(size) { 
  case 1: 
    buf=sprintf("%c",num&255); 
    break; 
  case 2: 
    buf=sprintf("%c%c",(num>>(bitsPerByte))&255,num&255); 
    break; 
  case 3: 
    buf=sprintf("%c%c%c",(num>>(bitsPerByte*2))&255, 
                (num>>(bitsPerByte))&255,num&255); 
    break; 
  case 4: 
    buf=sprintf("%c%c%c%c",(num>>(bitsPerByte*3))&255, 
                (num>>(bitsPerByte*2))&255,(num>>(bitsPerByte))&255,num&255); 
    break; 
  default: 
    werror(sprintf("Invalid writeBinaryInteger call: num %d, size %d\n", 
                   num,size)); 
    buf=""; 
  } 
  return buf; 
} 
 
 
string writeByte(int byte) 
{ 
  return sprintf("%c",byte); 
} 
 
 
 
string generate_search_apdu(string seed_words, string database, 
                            int maxDocsRetrieved) 
{ 
  string buf,nbuf; 
 
  buf = writeBinaryInteger(searchAPDU,1); 
  buf += writeBinaryInteger(30,3); 
  buf += writeBinaryInteger(5000,3); 
  buf += writeBinaryInteger(30,3); 
  buf += writeByte(1); 
  buf += writeString("",DT_ResultSetName); 
  buf += writeString(database,DT_DatabaseNames); 
  buf += writeString(QT_RelevanceFeedbackQuery,DT_QueryType); 
 
  /*  buf += writeString(" "+ES_DELIMITER_1+ES_DocumentText, 
      DT_ElementSetNames); */ 
 
  buf += writeString("3",DT_ReferenceID); 
 
  /* go back and write the header-length-indicator */ 
 
  nbuf=writeBinaryInteger(sizeof(buf),HEADER_LEN)+buf; 
 
  /* now write search info */ 
 
  buf = writeString(seed_words,DT_SeedWords); 
 
  buf += writeCompressedInteger(DT_DateFactor); 
  buf += writeCompressedInteger(1); 
  buf += writeBinaryInteger(1,1); 
 
  buf += writeString("0",DT_BeginDateRange); 
  buf += writeString("0",DT_EndDateRange); 
 
  buf += writeCompressedInteger(DT_MaxDocumentsRetrieved); 
  buf += writeCompressedInteger(getCompressedBinIntSize(maxDocsRetrieved)); 
  buf += writeBinaryInteger(maxDocsRetrieved, 
                            getCompressedBinIntSize(maxDocsRetrieved)); 
 
  /* write tag and size */ 
 
  nbuf += writeCompressedInteger(DT_UserInformationLength); 
  nbuf += writeCompressedInteger(sizeof(buf))+buf; 
 
  return nbuf; 
} 
 
 
string generate_retrieval_apdu(string docid, string doctype, string database) 
{ 
  int start,end; 
  string buf,nbuf,query; 
 
  start=0;end=10000; 
 
  if(!doctype) 
    doctype="TEXT"; 
 
  /* write search packet */ 
 
  buf = writeBinaryInteger(searchAPDU,1); 
  buf += writeBinaryInteger(10,3); 
  buf += writeBinaryInteger(16,3); 
  buf += writeBinaryInteger(15,3); 
  buf += writeByte(1); 
  buf += writeString("FOO",DT_ResultSetName); 
  buf += writeString(database,DT_DatabaseNames); 
  buf += writeString(QT_TextRetrievalQuery,DT_QueryType); 
  buf += writeString(" "+ES_DELIMITER_1+ES_DocumentText,DT_ElementSetNames); 
  buf += writeString("3",DT_ReferenceID); 
 
  /* go back and write the header-length-indicator */ 
 
  nbuf=writeBinaryInteger(sizeof(buf),HEADER_LEN)+buf; 
 
 
  /* now write the query */ 
 
  query = writeString(SYSTEM_CONTROL_NUMBER+AT_DELIMITER+EQUAL+AT_DELIMITER+ 
                      IGNORE+AT_DELIMITER+IGNORE+AT_DELIMITER+IGNORE+ 
                      AT_DELIMITER+IGNORE,DT_AttributeList); 
  query += writeString(docid,DT_Term); 
 
  query += writeString(DATA_TYPE+AT_DELIMITER+EQUAL+AT_DELIMITER+IGNORE+ 
                      AT_DELIMITER+IGNORE+AT_DELIMITER+IGNORE+AT_DELIMITER+ 
                      IGNORE,DT_AttributeList); 
  query += writeString(doctype,DT_Term); 
 
  query += writeString(AND,DT_Operator); 
 
  query += writeString(BYTE+AT_DELIMITER+GREATER_THAN_OR_EQUAL+AT_DELIMITER+ 
                       IGNORE+AT_DELIMITER+IGNORE+AT_DELIMITER+IGNORE+ 
                       AT_DELIMITER+IGNORE,DT_AttributeList); 
  query += writeString(sprintf("%d",start),DT_Term); 
 
  query += writeString(AND,DT_Operator); 
 
  query += writeString(BYTE+AT_DELIMITER+LESS_THAN+AT_DELIMITER+IGNORE+ 
                       AT_DELIMITER+IGNORE+AT_DELIMITER+IGNORE+AT_DELIMITER+ 
                       IGNORE,DT_AttributeList); 
  query += writeString(sprintf("%d",end),DT_Term); 
 
  query += writeString(AND,DT_Operator); 
 
  nbuf+=writeString(query,DT_Query); 
 
  WAIS_WERR_2("generate_retrieval_apdu got:\n"+nbuf); 
  return nbuf; 
} 
 
 
 
/*    Transform file identifier into WWW address 
 *      ------------------------------------------ 
 * 
 * 
 * On exit, 
 *      returns         nil if error 
 *                      string if ok 
 */ 
 
string WWW_from_archie(string file) 
{ 
  int i,q; 
  string res; 
 
 WAIS_WERR("archie id (to become WWW id): "+file); 
 
  for(i=0; i<strlen(file) && file[i]>' '; i++) 
    ; 
 
  q=search(file[0..i],":"); 
  if(q!=-1) 
    res="file://"+file[0..q]+file[q+2..i-1]; 
  else 
    res="file://"+file[0..i]; 
 
  WAIS_WERR("archie id (to become WWW id) result: "+res); 
 
  return res; 
} 
 
 
/*    Transform URL into WAIS document identifier 
 *      ------------------------------------------- 
 * 
 * On entry, 
 *      docname         points to valid name produced originally by 
 *                      WWW_from_WAIS 
 * On exit, 
 *      wait docid 
 */ 
 
string WAIS_from_WWW (string docname) 
{ 
  string z,t2; 
  int len,type,tmp; 
 
  WAIS_WERR_2("WWW id (to become WAIS id): "+debug_print_string(docname)); 
 
  z=""; 
  while(strlen(docname)>0) { 
    if(sscanf(docname,"%d=%s;",type,t2)!=2) { 
      if(sscanf(docname,"%d=",type)!=1) { 
        WAIS_WERR("cannot parse record"+docname); 
        return 0; 
      } 
      if(strlen(docname[search(docname,"=")+1..])>0) { 
        WAIS_WERR("cannot parse record"+docname+" (second choice)"); 
        return 0; 
      } 
      t2=sprintf("%c",0); 
      docname=""; 
    } 
 
    docname=docname[search(docname,";")+1..]; 
    len=strlen(t2); 
 
    z+=sprintf("%c",type); 
 
    if (len > 127) { 
      tmp = (len / 128); 
      len = len - (tmp * 128); 
      tmp = tmp + 128; 
      z+=sprintf("%c%c",tmp,len); 
    } else { 
      z+=sprintf("%c",len); 
    } 
    z+=t2; 
 
    WAIS_WERR(sprintf("found record %d, len %d, content %s\n",type,strlen(t2),t2)); 
  } 
 
  return z; 
} 
 
 
 
/* 
 *      Transform document identifier into URL 
 *      -------------------------------------- 
 */ 
 
string WWW_from_WAIS(string docid) 
{ 
  int in,l; 
  string out; 
 
  if(!docid) 
    return 0; 
 
  WAIS_WERR_2("WAIS id (to become WWW id): "+debug_print_string(docid)); 
 
  out=""; 
  for(in=0;in<sizeof(docid); ) { 
    out+=sprintf("%d",(int)docid[in]);  /* record put type */ 
 
    WAIS_WERR(sprintf("found record type %d",(int)docid[in])); 
 
    out+="="; 
    in+=1; 
    l=docid[in]; 
    in+=1; 
    if (l > 127) { 
      l = (l - 128) * 128; 
      l = l + docid[in]; 
      in+=1; 
    } 
    WAIS_WERR(sprintf("found record len %d\n",l)); 
 
    out += replace(docid[in..in+l-1], ({ "\000", " ", "%" }), 
                   ({"%00", "%20", "%25" }))+";"; 
    in+=l; 
  } 
 
  WAIS_WERR("translated in "+out); 
  return out; 
} 
 
 
/* 
 *      Format a plain text record 
 *      --------------------------- 
 */ 
 
string output_text_record(mapping record, int|void binary) 
{ 
  int count; 
  string bytes,out; 
 
  if (binary) 
    return record->documentText; 
 
  bytes=record->documentText; 
  out=""; 
 
  replace(bytes,({ "\033(" , "\033)" }) , ({ "",""})); 
 
  for(count = 0; count < sizeof(bytes); count++){ 
    if(bytes[count] == 27) { 
/* 
      if('(' == bytes[count + 1] || 
         ')' == bytes[count + 1]) 
        count += 1; 
      else 
*/ 
      count += 4; 
    } else if (bytes[count] == '\n' || bytes[count] == '\r') { 
      out+="\n"; 
    } else { 
 
      /* if ((bytes[count]=='\t') || isprint(bytes[count]))*/ 
 
      out+=sprintf("%c",bytes[count]); 
    } 
  } 
  return  out; 
} 
 
 
string showDiags(array (mapping) d) 
{ 
  int i; 
  string out; 
 
  out=""; 
 
  for (i=0; i<sizeof(d); i++) 
    if (strlen(d[i]->ADDINFO)>0) 
      out+="Diagnostic code is "+d[i]->DIAG+" "+d[i]->ADDINFO+"\n"; 
} 
 
/* 
 *      Format A Search response for the client 
 *      --------------------------------------- 
 */ 
 
 
 
string display_search_response(mapping response,string database, 
                               string key) 
{ 
  string out; 
  int archie,k; 
  mapping info; 
 
  WAIS_WERR("Displaying search response"); 
 
  out=sprintf("Index %s contains the following %d item%s relevant to '%s'.\n", 
              database,response->NumberOfRecordsReturned, 
              response->NumberOfRecordsReturned ==1 ? "" : "s", 
              key); 
  out+="The first figure for each entry is its relative score, " 
    "the second the number of lines in the item."; 
 
 
  archie=search(database, "archie")!=-1;    /* Special handling */ 
 
  out+="<MENU>"; 
 
 
  info = response->DatabaseDiagnosticRecords; 
 
  if (sizeof(info->Diagnostics)>0) { 
    WAIS_WERR("showing diags"); 
 
    out+=showDiags(info->Diagnostics); 
  } 
 
  if(sizeof(info->DocHeaders)>0) { 
    for (k=0; k<sizeof(info->DocHeaders); k++ ) { 
      mapping head; 
      string headline,docid,docname; 
 
      WAIS_WERR("showing header "+sprintf("%d (%d)",k,sizeof(info->DocHeaders))); 
 
      head=info->DocHeaders[k]; 
 
      if(head->headline) 
        headline = trim_junk(head->headline); 
      else 
        headline=""; 
      docid = info->DocHeaders[k]->docID; 
 
      /* Make a printable string out of the document id. */ 
 
      out+="<LI> "+sprintf("%4d  %4d",head->score,head->lines); 
 
      if (archie) { 
        string www_name; 
 
        if(www_name = WWW_from_archie(headline)) 
          out+="<A HREF=\""+www_name+"\">"+headline+"</A>\n"; 
        else 
          out+=headline+" (bad file name)"; 
      } else { /* Not archie */ 
        docname=WWW_from_WAIS(docid); 
        if(docname) { 
          string types_array; 
 
          types_array=""; 
 
          if(sizeof(head->types)>0) { 
            int i; 
 
            for (i=0; i<sizeof(head->types); i++) { 
              if(head->types[i]) { 
                if(i>0) 
                  types_array += ","; 
                types_array += replace(head->types[i], ({ "\000", " ", "%" }), 
                                       ({"%00", "%20", "%25" })); 
              } 
            } 
            WAIS_WERR("Types_array `"+types_array+"'"); 
          } else 
            types_array+="TEXT"; 
 
          if(sizeof(head->types)>0 && head->types[0]=="URL") 
            out+=" <A HREF=\""+headline+"\">\n"; 
          else 
            out+=" <A HREF=\""+replace(database, ({ "\000", " ", "%" }), 
                                       ({"%00", "%20", "%25" }))+ 
                                         "/"+types_array+ 
                   sprintf("/%d/",head->DocumentLength)+docname+"\">\n"; 
 
          out+=headline+"</A>\n"; 
        } else 
          out+="(bad doc id)\n"; 
      } 
    } /* next document header */ 
  } /* if there were any document headers */ 
 
  if(sizeof(info->ShortHeaders)>0) { 
    for(k =0; k<sizeof(info->ShortHeaders);k++) { 
      out+="\n(Short Header record, can't display)\n"; 
    } 
  } 
  if(sizeof(info->LongHeaders)>0) { 
    for(k =0; k<sizeof(info->LongHeaders);k++) { 
      out+="\n(Long Header record, can't display)\n"; 
    } 
  } 
  if(sizeof(info->Text)>0) { 
    for(k=0; k<sizeof(info->Text); k++) { 
      out+="\nText record\n"; 
      out+=output_text_record(info->Text[k], 0); 
    } 
  } 
  if(sizeof(info->Headlines)>0) { 
    for(k=0; k<sizeof(info->Headlines); k++) { 
      out+="\n(Headline record, can't display)\n"; 
    } 
  } 
  if(sizeof(info->Codes)>0) { 
    for(k=0;k<sizeof(info->Codes);k++) { 
      out+="\n(Code record, can't display)\n"; 
    } 
  } 
 
  out+="</MENU>\n"; 
 
  return out; 
} 
 
 
void my_pipe_done(array (object) a) 
{ 
  if(a[0]) 
    ::my_pipe_done(a[0]); 
} 
 
void write_to_client_and_cache(object client, string data, string key) 
{ 
  object cache; 
  object pip; 
  if(query("cache")) 
    if(key) 
      cache = roxen->create_cache_file("wais", key); 
 
  pip=Pipe.pipe( ); 
  if(cache) 
  { 
    pip->set_done_callback(my_pipe_done, ({ cache, client })); 
    pip->output(cache->file); 
  } 
  if(client->my_fd) 
  { 
    pip->output(client->my_fd); 
    pip->write(data); 
  } 
} 
 
 
int readBinaryInteger(int size,string buf) 
{ 
  int i,num; 
 
  if (size < 1 || size > BINARY_INTEGER_BYTES) 
    return 0;               /* error */ 
 
  num = 0; 
  for (i = 0; i < size; i++) { 
    num = num << bitsPerByte; 
    num += buf[i]; 
  } 
  return num; 
} 
 
 
int readCompressedInteger(string buf) 
{ 
  int num,i; 
 
  num=0; 
 
  i=0; 
  while(1) { 
    num = num << dataBits; 
    num += (buf[i] & dataMask); 
    if(!(buf[i] &  continueBit)) 
      return num; 
    i+=1; 
  } 
} 
 
int sizeCompressedInteger(string buf) 
{ 
  int num,i; 
 
  num=0; 
 
  i=0; 
  while(1) { 
    num += 1; 
    if(!(buf[i] &  continueBit)) 
      return num; 
    i+=1; 
  } 
} 
 
string skipCompressedInteger(string buf) 
{ 
  int i; 
 
  i=0; 
  while(1) { 
    if(!(buf[i] &  continueBit)) 
      return buf[i+1..]; 
    i+=1; 
  } 
} 
 
 
 
mapping readSearchResponseInfo(string buf) 
{ 
  array (mapping)  docHeaders; 
  array (mapping)  shortHeaders; 
  array (mapping)  longHeaders; 
  array (mapping)  text; 
  array (mapping)  headlines; 
  array (mapping)  codes; 
  array (mapping)  diags; 
 
  int val,size; 
 
  string seedWordsUsed; 
 
  diags = ({ }); 
  docHeaders = ({ }); 
  shortHeaders = ({ }); 
  longHeaders = ({ }); 
  text = ({ }); 
  headlines = ({ }); 
  codes = ({ }); 
 
 
 
  /* readUserInfoHeader */ 
 
  buf = skipCompressedInteger(buf); 
  size = readCompressedInteger(buf); 
  buf = skipCompressedInteger(buf); 
  buf=buf[0..size-1]; 
 
  while (strlen(buf)>0) { 
    switch (readCompressedInteger(buf)) { 
    case DT_SeedWordsUsed: 
      buf = skipCompressedInteger(buf); 
      val = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      seedWordsUsed = buf[0..val]; 
      buf=buf[val..]; 
      WAIS_WERR("got DT_SeedWordsUsed: "+seedWordsUsed); 
      break; 
    case DT_DatabaseDiagnosticRecords: 
      int len; 
      string diag,addinfo; 
      int surrogate; 
 
      buf = skipCompressedInteger(buf); 
      len = readBinaryInteger(2,buf); 
      buf = buf[2..]; 
 
      diag=""; 
      diag+=buf[0]; 
      diag+=buf[1]; 
      if(len>3) { 
        addinfo = buf[2..len-1]; 
        surrogate = buf[len-1]; 
        buf = buf[len+1..]; 
      } else { 
        surrogate = buf[len-1]; 
        buf = buf[2..]; 
      } 
      diags += ({ ([ "DIAG" : diag, "ADDINFO" : addinfo, "SURROGATE" : surrogate ]) }); 
      WAIS_WERR("got DT_DatabaseDiagnosticRecords: "+diag+" "+surrogate); 
      break; 
    case DT_DocumentHeaderGroup: 
      int versionNumber,score,bestMatch,docLength,lines; 
      string docID,source,date,headline,originCity,buf1; 
      array (string) types; 
 
      types = ({ }); 
 
      /* readWAISDocumentHeader */ 
 
      WAIS_WERR("got DT_DocumentHeaderGroup"); 
      versionNumber = UNUSED; 
      score = UNUSED; 
      bestMatch = UNUSED; 
      docLength = UNUSED; 
      lines = UNUSED; 
 
      /* readUserInfoHeader */ 
 
      buf = skipCompressedInteger(buf); 
      size = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      buf1=buf[0..size-1]; 
      buf=buf[size..]; 
 
      while (strlen(buf1)>0) { 
        switch (readCompressedInteger(buf1)) { 
        case DT_DocumentID: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          docID = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR_2("got DT_DocumentID: "+debug_print_string(docID)); 
          break; 
        case DT_VersionNumber: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          versionNumber = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_VersionNumber: "+sprintf("%d",versionNumber)); 
          break; 
        case DT_Score: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          score = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Score: "+sprintf("%d",score)); 
          break; 
        case DT_BestMatch: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          bestMatch = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_BestMatch: "+sprintf("%d",bestMatch)); 
          break; 
        case DT_DocumentLength: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          docLength = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_DocumentLength: "+sprintf("%d",docLength)); 
          break; 
        case DT_Lines: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          lines = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Lines: "+sprintf("%d",lines)); 
          break; 
 
        case DT_TYPE_BLOCK: 
          int size; 
 
          WAIS_WERR("got DT_TYPE_BLOCK:"); 
 
          buf1 = skipCompressedInteger(buf1); 
          size = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
 
          while (size > 0) { 
            size -= sizeCompressedInteger(buf1); 
            buf1 = skipCompressedInteger(buf1); 
            val = readCompressedInteger(buf1); 
            size -= sizeCompressedInteger(buf1); 
            buf1 = skipCompressedInteger(buf1); 
            types  += ({ buf1[0..val-1] }); 
            WAIS_WERR("got DT_TYPE_BLOCK, type: "+buf1[0..val-1]+sprintf(" size is %d, val is %d",size,val)); 
            buf1=buf1[val..]; 
            size -= val; 
          } 
          break; 
        case DT_Source: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          source = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Source: "+source); 
          break; 
        case DT_Date: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          date = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Date: "+date); 
          break; 
        case DT_Headline: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          headline = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Headline: "+headline); 
          break; 
        case DT_OriginCity: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          originCity = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_OriginCity: "+originCity); 
          break; 
        default: 
          WAIS_WERR("got default (ARRRGGGH)"); 
          return 0; 
          break; 
        } 
      } 
      WAIS_WERR("end DT_DocumentHeaderGroup"); 
      docHeaders += ({ (["versionNumber" : versionNumber, 
                         "score" : score, 
                         "bestMatch" : bestMatch, 
                         "docLength" : docLength, 
                         "lines" : lines, 
                         "docID" : docID, 
                         "types" : types, 
                         "source" : source, 
                         "date" : date, 
                         "headline" : headline, 
                         "originCity" : originCity ]) }); 
      break; 
    case DT_DocumentShortHeaderGroup: 
      WAIS_WERR("got DT_DocumentShortHeaderGroup"); 
 
      versionNumber = UNUSED; 
      score = UNUSED; 
      bestMatch = UNUSED; 
      docLength = UNUSED; 
      lines = UNUSED; 
 
      /* readUserInfoHeader */ 
 
      buf = skipCompressedInteger(buf); 
      size = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      buf1=buf[0..size-1]; 
      buf=buf[size..]; 
 
      while (strlen(buf1)>0) { 
        switch (readCompressedInteger(buf1)) { 
        case DT_DocumentID: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          docID = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_DocumentID: "+docID); 
          break; 
        case DT_VersionNumber: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          versionNumber = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_VersionNumber: "+sprintf("%d",versionNumber)); 
          break; 
        case DT_Score: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          score = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Score: "+sprintf("%d",score)); 
          break; 
        case DT_BestMatch: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          bestMatch = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_BestMatch: "+sprintf("%d",bestMatch)); 
          break; 
        case DT_DocumentLength: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          docLength = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_DocumentLength: "+sprintf("%d",docLength)); 
          break; 
        case DT_Lines: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          lines = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Lines: "+sprintf("%d",lines)); 
          break; 
        default: 
          WAIS_WERR("got default 2 (ARRRGGGH)"); 
          return 0; 
          break; 
        } 
      } 
      WAIS_WERR("end DT_DocumentShortHeaderGroup"); 
      shortHeaders += ({ (["versionNumber" : versionNumber, 
                           "score" : score, 
                           "bestMatch" : bestMatch, 
                           "docLength" : docLength, 
                           "lines" : lines, 
                           "docID" : docID ]) }); 
 
      break; 
    case DT_DocumentLongHeaderGroup: 
      string stockCodes, companyCodes,industryCodes; 
 
      /* readWAISDocumentHeader */ 
 
      WAIS_WERR("got DT_DocumentLongHeaderGroup"); 
      versionNumber = UNUSED; 
      score = UNUSED; 
      bestMatch = UNUSED; 
      docLength = UNUSED; 
      lines = UNUSED; 
 
      /* readUserInfoHeader */ 
 
      buf = skipCompressedInteger(buf); 
      size = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      buf1=buf[0..size-1]; 
      buf=buf[size..]; 
 
      while (strlen(buf1)>0) { 
        switch (readCompressedInteger(buf1)) { 
        case DT_DocumentID: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          docID = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_DocumentID: "+docID); 
          break; 
        case DT_VersionNumber: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          versionNumber = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_VersionNumber: "+sprintf("%d",versionNumber)); 
          break; 
        case DT_Score: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          score = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Score: "+sprintf("%d",score)); 
          break; 
        case DT_BestMatch: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          bestMatch = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_BestMatch: "+sprintf("%d",bestMatch)); 
          break; 
        case DT_DocumentLength: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          docLength = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_DocumentLength: "+sprintf("%d",docLength)); 
          break; 
        case DT_Lines: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          lines = readBinaryInteger(val,buf1); 
          buf1 = buf1[val..]; 
          WAIS_WERR("got DT_Lines: "+sprintf("%d",lines)); 
          break; 
 
        case DT_TYPE_BLOCK: 
          int size; 
 
          WAIS_WERR("got DT_TYPE_BLOCK: "); 
 
          buf1 = skipCompressedInteger(buf1); 
          size = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
 
          while (size > 0) { 
            val = readCompressedInteger(buf1); 
            size -= sizeCompressedInteger(buf1); 
            buf1 = skipCompressedInteger(buf1); 
            types  += ({buf1[0..val]}); 
            WAIS_WERR("got DT_TYPE_BLOCK, type: "+buf1[0..val]); 
            buf1=buf1[val..]; 
            size -= val; 
          } 
          break; 
        case DT_Source: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          source = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Source: "+source); 
          break; 
        case DT_Date: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          date = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Date: "+date); 
          break; 
        case DT_Headline: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          headline = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Headline: "+headline); 
          break; 
        case DT_OriginCity: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          originCity = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_OriginCity: "+originCity); 
          break; 
        case DT_StockCodes: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          stockCodes = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_StockCodes: "+stockCodes); 
          break; 
        case DT_CompanyCodes: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          companyCodes = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_CompanyCodes: "+companyCodes); 
          break; 
        case DT_IndustryCodes: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          industryCodes = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_IndustryCodes: "+industryCodes); 
          break; 
        default: 
          WAIS_WERR("got default 3 (ARRRGGGH)"); 
          return 0; 
          break; 
        } 
      } 
      WAIS_WERR("end DT_DocumentLongHeaderGroup"); 
      longHeaders += ({ (["versionNumber" : versionNumber, 
                          "score" : score, 
                          "bestMatch" : bestMatch, 
                          "docLength" : docLength, 
                          "lines" : lines, 
                          "docID" : docID, 
                          "types" : types, 
                          "source" : source, 
                          "date" : date, 
                          "headline" : headline, 
                          "originCity" : originCity, 
                          "stockCodes" : stockCodes, 
                          "companyCodes" : companyCodes, 
                          "industryCodes" : industryCodes ]) }); 
      break; 
    case DT_DocumentTextGroup: 
      string documentText; 
 
      /* readUserInfoHeader */ 
 
      buf = skipCompressedInteger(buf); 
      size = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      buf1=buf[0..size-1]; 
      buf=buf[size..]; 
 
      WAIS_WERR_2("got DT_DocumentTextGroup ("+debug_print_string(buf1)+")"); 
 
      while (strlen(buf1)>0) { 
        switch (readCompressedInteger(buf1)) { 
        case DT_DocumentID: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          docID = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR_2("got DT_DocumentID: "+debug_print_string(docID)); 
          break; 
        case DT_VersionNumber: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          versionNumber = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_VersionNumber: "+sprintf("%d",versionNumber)); 
          break; 
        case DT_DocumentText: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          documentText = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_DocumentText: "+documentText); 
          break; 
        default: 
          WAIS_WERR("got default 4 (ARRRGGGH)"); 
          return 0; 
          break; 
        } 
      } 
 
      text += ({ (["docID" : docID, 
                   "versionNumber" : versionNumber, 
                   "documentText" : documentText ]) }); 
      break; 
    case DT_DocumentHeadlineGroup: 
      /* readWAISDocumentHeader */ 
 
      WAIS_WERR("got DT_DocumentHeadlineGroup"); 
      versionNumber = UNUSED; 
 
      /* readUserInfoHeader */ 
 
      buf = skipCompressedInteger(buf); 
      size = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      buf1=buf[0..size-1]; 
      buf=buf[size..]; 
 
      while (strlen(buf1)>0) { 
        switch (readCompressedInteger(buf1)) { 
        case DT_DocumentID: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          docID = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_DocumentID: "+docID); 
          break; 
        case DT_VersionNumber: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          versionNumber = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_VersionNumber: "+sprintf("%d",versionNumber)); 
          break; 
        case DT_Source: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          source = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Source: "+source); 
          break; 
        case DT_Date: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          date = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Date: "+date); 
          break; 
        case DT_Headline: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          headline = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_Headline: "+headline); 
          break; 
        case DT_OriginCity: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          originCity = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_OriginCity: "+originCity); 
          break; 
        default: 
          WAIS_WERR("got default 3 (ARRRGGGH)"); 
          return 0; 
          break; 
        } 
      } 
      WAIS_WERR("end DT_DocumentHeadlineGroup"); 
      headlines += ({ (["versionNumber" : versionNumber, 
                        "docID" : docID, 
                        "source" : source, 
                        "date" : date, 
                        "headline" : headline, 
                        "originCity" : originCity ]) }); 
      break; 
    case DT_DocumentCodeGroup: 
      /* readWAISDocumentHeader */ 
 
      WAIS_WERR("got DT_DocumentCodeGroup"); 
      versionNumber = UNUSED; 
 
      /* readUserInfoHeader */ 
 
      buf = skipCompressedInteger(buf); 
      size = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      buf1=buf[0..size-1]; 
      buf=buf[size..]; 
 
      while (strlen(buf1)>0) { 
        switch (readCompressedInteger(buf1)) { 
        case DT_DocumentID: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          docID = buf1[0..val-1]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_DocumentID: "+docID); 
          break; 
        case DT_VersionNumber: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          versionNumber = readBinaryInteger(val,buf1); 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_VersionNumber: "+sprintf("%d",versionNumber)); 
          break; 
        case DT_StockCodes: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          stockCodes = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_StockCodes: "+stockCodes); 
          break; 
        case DT_CompanyCodes: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          companyCodes = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_CompanyCodes: "+companyCodes); 
          break; 
        case DT_IndustryCodes: 
          buf1 = skipCompressedInteger(buf1); 
          val = readCompressedInteger(buf1); 
          buf1 = skipCompressedInteger(buf1); 
          industryCodes = buf1[0..val]; 
          buf1=buf1[val..]; 
          WAIS_WERR("got DT_IndustryCodes: "+industryCodes); 
          break; 
        default: 
          WAIS_WERR("got default 4 (ARRRGGGH)"); 
          return 0; 
          break; 
        } 
      } 
      WAIS_WERR("end DT_DocumentCodesGroup"); 
      codes += ({ (["versionNumber" : versionNumber, 
                    "docID" : docID, 
                    "stockCodes" : stockCodes, 
                    "companyCodes" : companyCodes, 
                    "industryCodes" : industryCodes ]) }); 
      break; 
    default: 
      WAIS_WERR("got default 5 (ARRRGGGH)"); 
      break; 
    } 
  } 
 
  return (["seedWordsUsed" : seedWordsUsed, 
           "DocHeaders" : docHeaders, 
           "ShortHeaders" : shortHeaders, 
           "LongHeaders" : longHeaders, 
           "Text" : text, 
           "Headlines" : headlines, 
           "Codes" : codes, 
           "Diagnostics" : diags ]); 
} 
 
 
 
mapping readSearchResponseAPDU(string buf) 
{ 
  int size,pduType,val; 
  int result,count,recordsReturned,nextPos; 
  int resultStatus,presentStatus; 
  string refID,resto; 
  mapping userInfo; 
 
  /* read required part */ 
 
  size = readBinaryInteger(HEADER_LEN,buf); 
  buf=buf[HEADER_LEN..]; 
 
  resto=buf[size..]; 
  buf=buf[0..size-1]; 
 
  pduType = readBinaryInteger(1,buf); 
  buf=buf[1..]; 
 
  result = readBinaryInteger(1,buf); 
  buf=buf[1..]; 
 
  count = readBinaryInteger(3,buf); 
  buf=buf[3..]; 
 
  recordsReturned = readBinaryInteger(3,buf); 
  buf=buf[3..]; 
 
  nextPos = readBinaryInteger(3,buf); 
  buf=buf[3..]; 
 
  WAIS_WERR(sprintf("WAIS: Got response %d,%d,%d,%d,%d,%d.\n",size,pduType, 
                      result,count,recordsReturned,nextPos)); 
 
  resultStatus = presentStatus = UNUSED; 
  refID = ""; 
 
  /* read optional part */ 
 
  while (strlen(buf)>0) { 
    switch (readCompressedInteger(buf)) { 
    case DT_ResultSetStatus: 
      buf = skipCompressedInteger(buf); 
      val = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      resultStatus = readBinaryInteger(val,buf); 
      buf=buf[val..]; 
      WAIS_WERR("got DT_ResultSetStatus: "+sprintf("%d",resultStatus)); 
      break; 
    case DT_PresentStatus: 
      buf = skipCompressedInteger(buf); 
      val = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      presentStatus = readBinaryInteger(val,buf); 
      buf=buf[val..]; 
      WAIS_WERR("got DT_PresentStatus: "+sprintf("%d",presentStatus)); 
      break; 
    case DT_ReferenceID: 
      buf = skipCompressedInteger(buf); 
      val = readCompressedInteger(buf); 
      buf = skipCompressedInteger(buf); 
      refID = buf[0..val]; 
      buf=buf[val..]; 
      WAIS_WERR("got DT_ReferenceID: "+refID); 
      break; 
    default: 
      return 0; 
      break; 
    } 
  } 
 
  userInfo = readSearchResponseInfo(resto); 
 
  if(!userInfo) 
    return 0; 
 
 
  /* construct the search object */ 
 
  return (["PDUType" : searchResponseAPDU, 
           "SearchStatus" : result, 
           "ResultCount" : count, 
           "NumberOfRecordsReturned" : recordsReturned, 
           "NextResultSetPosition" : nextPos, 
           "ResultSetStatus" : resultStatus, 
           "PresentStatus" : presentStatus, 
           "ReferenceID" : refID, 
           "DatabaseDiagnosticRecords" : userInfo ]); 
} 
 
 
 
string make_error_page(string error) 
{ 
  return "WAIS Proxy error accessing wide area information system.\n"+error+"\n"; 
} 
 
void done_fetch_data(array in) 
{ 
  int bin; 
  mapping query_resp,searchres; 
  object to; 
  string docname; 
 
  to=in[3]; 
  destruct(in[4]); 
  docname=in[5]; 
  bin=in[6]; 
 
  if(!objectp(to)) 
    return; 
 
  if(in[1]<2) { 
    destruct(to); 
    return; 
  } 
 
  if(in[2]==0) { 
    /* null record returned */ 
 
    destruct(to); 
    return; 
  } 
 
  WAIS_WERR_2("WAIS: Got all fetch data ("+ 
                debug_print_string(in[0][HEADER_LENGTH..])+").\n"); 
 
  /* Parse the result which came back into memory. */ 
  query_resp=readSearchResponseAPDU(in[0][HEADER_LENGTH..]); 
  searchres = query_resp->DatabaseDiagnosticRecords; 
 
  if (sizeof(searchres->Text)==0) { 
    if (sizeof(searchres->Diagnostics)>0 && 
        strlen(searchres->Diagnostics[0]->ADDINFO)>0) { 
      write_to_client_and_cache(to, "HTTP/1.0 200 Yo! Wais data comming" 
                                " soon to a screen near you\n" 
                                "Content-Type: text/html\n\n"+ 
                                make_error_page(searchres->Diagnostics[0]-> 
                                                ADDINFO),0); 
    } else { 
      write_to_client_and_cache(to, "HTTP/1.0 200 Yo! Wais data comming" 
                                " soon to a screen near you\n" 
                                "Content-Type: text/html\n\n"+ 
                                make_error_page(""),0); 
    } 
  } else { 
    if(!bin && (searchres->Text[0]->documentText[0..5]=="<html>" || 
                searchres->Text[0]->documentText[0..5]=="<HTML>")) 
      in[7]="text/html"; 
 
    if(docname && strlen(docname)>0) 
      write_to_client_and_cache(to, "HTTP/1.0 200 Yo! Wais data comming" 
                                " soon to a screen near you\n" 
                                "Content-Type: "+in[7]+"\n\n"+ 
                                output_text_record(searchres->Text[0], 
                                                   bin),docname); 
    else 
      write_to_client_and_cache(to, "HTTP/1.0 200 Yo! Wais data comming" 
                                " soon to a screen near you\n" 
                                "Content-Type: "+in[7]+"\n\n"+ 
                                output_text_record(searchres->Text[0], 
                                                   bin),0); 
  } 
  destruct(to); 
} 
 
 
void got_fetch_data(array i, string s) 
{ 
  int q,t; 
 
  WAIS_WERR("Got some fetch data."); 
  i[0] += s; 
 
  switch(i[1]) { 
  case 0: 
    /* waiting for first '0' char */ 
    if((q=search(i[0],"0"))==-1) 
      return; 
 
    WAIS_WERR("Got first 0."); 
 
    if(q>0) 
      i[0]=i[0][q..]; 
    i[1]=1; 
  case 1: 
    /* waiting to receive a complete header */ 
 
    if(sizeof(i[0])<HEADER_LENGTH) 
      return; 
 
    WAIS_WERR("Got header ("+i[0][0..24]+", len is "+i[0][0..9]+")."); 
 
    for(t=0;i[0][t]=='0';t++) 
      ; 
 
    if(sscanf(i[0][t..10],"%dz",q)!=1) { 
      WAIS_WERR("message header error."); 
      destruct(i[3]); 
      destruct(i[4]); 
      return; 
    } 
 
    i[2]=q; 
    i[1]=2; 
 
  case 2: 
    /* waiting to receive all the datas */ 
 
    if(sizeof(i[0])>=i[2]+HEADER_LENGTH) { 
 
      WAIS_WERR(sprintf("got all fetch datas (%d on %d).\n",sizeof(i[0]), 
                          i[2])); 
      i[1]=3; 
      done_fetch_data(i); 
    } 
  } 
} 
 
 
 
void done_search_data(array in) 
{ 
  mapping query_resp; 
  object to; 
  string database,key; 
 
  to=in[3]; 
  destruct(in[4]); 
  database=in[5]; 
  key=in[6]; 
 
  if(!objectp(to)) 
    return; 
 
  if(in[1]<2) { 
    destruct(to); 
    return; 
  } 
 
  if(in[2]==0) { 
    /* null record returned */ 
 
    destruct(to); 
    return; 
  } 
 
  WAIS_WERR_2("Got all search data ("+ 
                debug_print_string(in[0][HEADER_LENGTH..])+")."); 
 
  /* Parse the result which came back into memory. */ 
  query_resp=readSearchResponseAPDU(in[0][HEADER_LENGTH..]); 
 
  write_to_client_and_cache(to, display_search_response(query_resp,database, 
                                                        key)+"</BODY></HTML>", 
                            0); 
  destruct(to); 
} 
 
 
void got_search_data(array i, string s) 
{ 
  int q,t; 
 
  WAIS_WERR("Got some search data."); 
  i[0] += s; 
 
  switch(i[1]) { 
  case 0: 
    /* waiting for first '0' char */ 
    if((q=search(i[0],"0"))==-1) 
      return; 
 
    WAIS_WERR("Got first 0."); 
 
    if(q>0) 
      i[0]=i[0][q..]; 
    i[1]=1; 
  case 1: 
    /* waiting to receive a complete header */ 
 
    if(sizeof(i[0])<HEADER_LENGTH) 
      return; 
 
    WAIS_WERR("Got header ("+i[0][0..24]+", len is "+i[0][0..9]+")."); 
 
    for(t=0;i[0][t]=='0';t++) 
      ; 
 
    if(sscanf(i[0][t..10],"%dz",q)!=1) { 
      WAIS_WERR("message header error."); 
      destruct(i[3]); 
      destruct(i[4]); 
      return; 
    } 
 
    i[2]=q; 
    i[1]=2; 
 
  case 2: 
    /* waiting to receive all the datas */ 
 
    if(strlen(i[0])>=i[2]+HEADER_LENGTH) { 
 
      WAIS_WERR("got all search datas."); 
      i[1]=3; 
      done_search_data(i); 
    } 
  } 
} 
 
 
 
 
void connected(object ok, string file, object send_to, string key) 
{ 
  string database,doctype,docname,basetitle; 
  int doclen,i; 
  string reqmsg,header; 
 
  WAIS_WERR("Connected"); 
 
  if(!send_to) 
  { 
    destruct(ok); 
    return; 
  } 
 
  if(!ok) 
  { 
    send_to->end(CONNECTION_REFUSED); 
    return; 
  } 
 
  key=send_to->query; 
 
  if(key && strlen(key)==0) 
    key=0; 
 
 
  if(!key) { 
    if((i=search(file,"/"))!=-1) { 
      database=file[0..i-1]; 
      file=file[i+1..]; 
    } 
 
    if((i=search(file,"/"))!=-1) { 
      doctype=file[0..i-1]; 
      file=file[i+1..]; 
 
      if(sscanf(file, "%d/", doclen)==1) { 
        file=file[search(file,"/")+1..]; 
        docname=file; 
      } 
    } else if(!key) 
      key=""; 
  } else { 
    if((i=search(file,"?"))!=-1) { 
      database=file[0..i-1]; 
      file=file[i+1..]; 
    } 
    else if((i=search(file,"/"))!=-1) { 
      database=file[0..i-1]; 
      file=file[i+1..]; 
    } 
    else 
      database=file; 
  } 
 
  WAIS_WERR("request is:\nkey "+key+"\ndatabase "+database+"\ndoctype "+ 
              doctype+"\ndoclength "+sprintf("%d",doclen)+"\ndocname "+docname); 
 
  basetitle=database; 
 
/*    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 && strlen(key)==0) {           /* I N D E X */ 
    WAIS_WERR("Index"); 
 
    send_to->my_fd->write("HTTP/1.0 200 Yo! Wais data comming soon to a " 
                          "screen near you\nContent-Type: text/html\n\n" 
                          "<HTML><TITLE>"+basetitle+" Index</TITLE>" 
                          "<BODY><H1>WAIS Index: "+basetitle+"</H1>" 
                          "<ISINDEX PROMPT=\"Wais search:  \">"); 
    destruct(ok); 
    destruct(send_to); 
  } else if (key) {                                     /* S E A R C H */ 
 
    WAIS_WERR("Search"); 
 
    replace(key,({"+"}),({" "})); 
 
    if(!(reqmsg = generate_search_apdu(key,database,1000))) { 
      send_to->end(CONNECTION_REFUSED); 
      destruct(ok); 
      destruct(send_to); 
      return; 
    } 
 
    header  = sprintf("%010d",strlen(reqmsg)); 
    header += "z"; 
    header += HEADER_VERSION; 
    header += "wais      "; 
    header += NO_COMPRESSION; 
    header += NO_ENCODING; 
    header += "0"; 
    header += reqmsg; 
 
    WAIS_WERR_2("about to send message ("+debug_print_string(header)+")"); 
 
    /* Write out message. Read back header. */ 
 
    ok->write(header); 
    ok->set_id(({ "", 0, 0, send_to, ok,database, key })); 
    ok->set_nonblocking(got_search_data, lambda(){},done_search_data); 
 
    send_to->my_fd->write("HTTP/1.0 200 Yo! Wais data comming soon to a " 
                          "screen near you\nContent-Type: text/html\n\n" 
                          "<HTML><TITLE>"+key+" in "+basetitle+"</TITLE>" 
                          "<BODY><H1>WAIS Search of \""+key+" in "+basetitle+ 
                          "</H1><ISINDEX PROMPT=\"Wais search:  \">"); 
    return; 
  } else {                  /* D O C U M E N T    F E T C H */ 
    string format; 
    int bin; 
    string docid; 
 
    WAIS_WERR("Fetch... Retrieve document `"+docname+ 
                "'\n............ type `"+doctype+ 
                sprintf("' length %d\n", doclen)); 
 
    switch(doctype) { 
    case "WSRC": 
      format="application/x-wais-source"; 
      bin=0; 
      break; 
    case "TEXT": 
      bin=0; 
      format="text/plain"; 
      break; 
    case "HTML": 
      bin=0; 
      format="text/html"; 
      break; 
    case "GIF": 
      bin=1; 
      format="image/gif"; 
      break; 
    default: 
      bin=1; 
      format="application/octet-stream"; 
      break; 
    } 
 
    /* Decode hex or litteral format for document ID */ 
    docid=WAIS_from_WWW(docname); 
 
    if(!(reqmsg = generate_retrieval_apdu(docid, doctype,database))) { 
      send_to->end(CONNECTION_REFUSED); 
      destruct(ok); 
      destruct(send_to); 
      return; 
    } 
 
    header  = sprintf("%010d",strlen(reqmsg)); 
    header += "z"; 
    header += HEADER_VERSION; 
    header += "wais      "; 
    header += NO_COMPRESSION; 
    header += NO_ENCODING; 
    header += "0"; 
    header += reqmsg; 
 
    WAIS_WERR_2("about to send message ("+debug_print_string(header)+")"); 
 
    WAIS_WERR(sprintf("requesting document type %s, binary %d)",format,bin)); 
 
    /* Write out message. Read back header. */ 
 
    ok->write(header); 
    ok->set_id(({ "", 0, 0, send_to, ok,docname,bin,format })); 
    ok->set_nonblocking(got_fetch_data, lambda(){},done_fetch_data); 
    return; 
  } 
} 
 
 
 
 
 
mapping find_file(string fi, object id) 
{ 
  mixed tmp; 
  string h, f; 
  int p; 
  WAIS_WERR("find_file("+fi+")"); 
 
  sscanf(fi, "%[^/]/%s", h, f); 
  if(!f) 
    f=""; 
 
  if (has_prefix(h, "[")) { 
    //  IPv6 
    if (sscanf(h, "[%s]:%d", h, p)) 
      h = "[" + h + "]"; 
  } else { 
    sscanf(h, "%s:%d", h, p); 
  } 
  if(!p) 
    p=210; 
 
  WAIS_WERR("host = "+h+"\nfile = "+f+"\nport = "+p); 
 
  if(tmp = proxy_auth_needed(id)) 
    return tmp; 
 
  if(id->pragma["no-cache"] || id->method != "GET") { 
    async_connect(h, p, connected, f, id, h+":"+p+"/"+f); 
  } else { 
    async_cache_connect(h, p, "wais", h+":"+p+"/"+f, 
                        connected, f, id, h+":"+p+"/"+f); 
  } 
  id->do_not_disconnect = 1; 
  return http_pipe_in_progress(); 
} 
 
string info() 
{ 
  return ("This is a caching wais gateway, useful for firewall sites and " 
          "for everyone who wants to aquire better 'surfing speed'."); 
}