Changeset 7594

Timestamp:

2004-06-16T09:48:55+12:00 (20 years ago)

Author:

mdewsnip

Message:

"I'm feeling lucky" functionality (a la Google). An extra argument ("ifl") can be specified to a query -- in this case, the user will be taken directly to the first matching document.

You can add a checkbox to the query form to get this functionality:

<input type=checkbox name="ifl">I'm feeling lucky!

This functionality is also very useful to go directly from some key value (eg. a unique file name) to a document, from within format statements. This removes the need to know the HASH ID of the target document.

Location:

trunk/gsdl/src/recpt

Files:

• cgiargs.h (modified) (1 diff)
• queryaction.cpp (modified) (3 diffs)
• receptionist.cpp (modified) (1 diff)

trunk/gsdl/src/recpt/cgiargs.h

@@ -51 +51 @@
 // should be produced
 // fullcontent same as content but the action should put content-type as last header.
-enum response_t {location, content, fullcontent};
+enum response_t {location, content, fullcontent, undecided_location};
 
 

trunk/gsdl/src/recpt/queryaction.cpp

@@ -418 +418 @@
   arg_ainfo.savedarginfo = cgiarginfo::must;
   argsinfo.addarginfo (NULL, arg_ainfo);
-  
+
+  // "ifl" - I'm feeling lucky! (Go directly to the first matching document)
+  arg_ainfo.shortname = "ifl";
+  arg_ainfo.longname = "i'm feeling lucky";
+  arg_ainfo.multiplechar = false;
+  arg_ainfo.defaultstatus = cgiarginfo::weak;
+  arg_ainfo.argdefault = g_EmptyText;
+  arg_ainfo.savedarginfo = cgiarginfo::mustnot;
+  argsinfo.addarginfo (NULL, arg_ainfo);
+
 }
 
@@ -538 +547 @@
 }
 
-void queryaction::get_cgihead_info (cgiargsclass &/*args*/, recptprotolistclass * /*protos*/,
+void queryaction::get_cgihead_info (cgiargsclass &args, recptprotolistclass * /*protos*/,
                     response_t &response, text_t &response_data, 
                     ostream &/*logout*/) {
+  // If this is an "I'm feeling lucky" request, we don't know the target location until later
+  if (!args["ifl"].empty()) {
+    response = undecided_location;
+    return;
+  }
+
   response = content;
   response_data = "text/html";
@@ -1312 +1327 @@
     bool syntax_error = false;
     if (err == syntaxError) syntax_error = true;
+
+    if (!args["ifl"].empty()) {
+      // Go directly to the first matching document
+      ResultDocInfo_tarray::iterator thissection = response.docInfo.begin();
+      if (thissection != response.docInfo.end()) {
+    text_t& arg_d = (*thissection).OID;
+    text_t doc_url = "_httpdocument_";
+    doc_url += "&c=" + collection;
+    doc_url += "&d=" + arg_d;
+
+    // location response (url may contain macros!!)
+    textout << outconvert << disp << "Location: " << doc_url << "\n\n";
+      }
+      // Ooops... there weren't any matching documents
+      else {
+    // Surely there must be a better way to get the query URL without the ifl argument?
+    // This is not complete!
+    text_t query_url = "_gwcgi_";
+    query_url += "?e=" + args["e"];
+    query_url += "&h=" + args["h"];
+    query_url += "&q=" + args["q"];
+    query_url += "&r=" + args["r"];
+    query_url += "&t=" + args["t"];
+    query_url += "&hs=" + args["hs"];
+
+    textout << outconvert << disp << "Location: " << query_url << "\n\n";
+      }
+
+      textout << flush;
+      return true;
+    }
+
     //return false;
     define_query_macros (args, disp, response.numDocs, response.isApprox);

trunk/gsdl/src/recpt/receptionist.cpp

@@ -848 +848 @@
 
     contentout << text_t2ascii << "Content-type: " << response_data << "\n\n";
-  } else {
+  }
+  else if (response == undecided_location) {
+    // Wait until later to output the target location
+    // Used for the "I'm feeling lucky" functionality
+  }
+  else {
     // unknown response
     logout << "Error: get_cgihead_info returned an unknown response type.\n";