lib/wsrequest.js

   1 var url = require("url");
   2 var path = require("path");
   3 var fs = require("fs");
   4 //var myparse = require("./myparse.js");
   5 var webmain = require("./webmain.js");
   6 var layouts = require("./layouts.js");
   7
   8 // global stuff
   9 var extraCss = new Array();
  10 var extraJs = new Array();
  11 //var defaultLayout = null;
  12 var defaultMainPurl = null;
  13
  14 //var staticExtensions = ["html", "gif", "jpg", "css", "js", "ico"];
  15
  16 function wsRequest(request, response) {
  17         var isStatic = 0;
  18         var purl = url.parse(request.url);
  19
  20         /*staticExtensions.forEach(function testExtn(setest) {
  21                 console.log("testing url: ", request.url);
  22                 console.log("against: ", purl.pathname);
  23                 var chk = purl.pathname.split(".");
  24                 console.log("chk: ", chk);
  25                 var chkid = staticExtensions.indexOf(chk[chk.length-1].toLowerCase());
  26                 console.log("chkid is ", chkid);
  27                 if(chkid != -1) {
  28                         isStatic = 1;
  29                 }
  30         });*/
  31
  32         // if the end of the pathname is something.something, we assume static
  33         var lpath = purl.pathname.split("/").pop();
  34         var idx = lpath.indexOf(".");
  35         console.log("testing url: ", request.url);
  36         console.log("against: ", purl.pathname);
  37         console.log("lpath is: '%s'", lpath);
  38         console.log("type is: '%s'", typeof lpath);
  39         console.log("idx is: ", idx);
  40
  41         if(idx > 0) isStatic = 1;
  42
  43         if(isStatic == 1) {
  44                 // do the static
  45                 console.log("Service as static");
  46                 serveStatic(lpath, response);
  47                 return;
  48         }
  49
  50         //console.log("request: ", request);
  51         console.log("purl: ", purl);
  52
  53         // now we need to find the extension used
  54         // to serve the request based no the first purl
  55
  56
  57         /*
  58          *
  59         if(purl.pathname == "/") {
  60                 console.log("Serv main");
  61                 webmain.serveMain(request, response, function (request, response) {
  62                         response.end();
  63                 });
  64                 return;
  65         }
  66
  67         var thispurl = purl.pathname.split("/")[1];
  68         fs.stat("./purls/web_"+thispurl+".js", function (err, stats) {
  69                 console.log("get purl is "+thispurl+" and err "+err+" and "+stats);
  70                 if(err) {
  71                         response.writeHead(404, {"Content-Type": "text/plain"});
  72                         response.write("404 Not Found\n");
  73                         response.end();
  74                         return;
  75                 }
  76                 var thiserv = require("../purls/web_"+thispurl+".js");
  77                 if(thiserv.requireBody()) {
  78                         console.log("yubber is true");
  79                         webmain.serveBody(request, response, thiserv.process);
  80                 } else {
  81                         console.log("yubber is false");
  82                         thiserv.process(request, response, function(request, response) {
  83                                 response.end();
  84                         });
  85                 }
  86                 return;
  87         });
  88         */
  89
  90         urlServicer(request, response, purl);
  91
  92
  93         return;
  94 }
  95
  96 function urlServicer(request, response, purl) {
  97         console.log("url servicer called for ", purl);
  98
  99         // first resolve the module making the call and determine layout/purl
 100         var purlClass = layouts;
 101         var purlLayout = layouts.standard();
 102         var mainPath = path.dirname(require.main.filename) + "/purls/";
 103
 104         console.log("main purl path is ", mainPath);
 105
 106         if(purl.pathname == "/") {
 107                 if(defaultMainPurl == null) {
 108                         console.log("set purl class to layouts");
 109                         purlClass = layouts;
 110                 } else {
 111                         // find and load the purl
 112                 }
 113
 114         } else {
 115                 // handle the purls
 116                 var newPurlPath = mainPath+"/"+path.basename(purl.pathname.replace(/\/$/, ""))+".js";
 117                 console.log("attempting to require: ", newPurlPath);
 118                 try {
 119                         var newPurlClass = require(newPurlPath);
 120                         purlClass = newPurlClass;
 121                 } catch(err) {
 122                         console.log("tried to load '%s' for request '%s', but this has failed, returning 302 to /", newPurlPath, purl.pathname);
 123                         response.writeHead("302", { 'Location': '/' });
 124                         response.end();
 125                         return;
 126                 }
 127
 128         }
 129
 130         if(typeof purlClass.layout == "undefined") {
 131                 console.log("set via undefined");
 132                 purlLayout = layouts.standard();
 133         } else {
 134                 // find and resolve the layout
 135                 purlLayout = purlClass.layout();
 136         }
 137
 138         // now we should have a layout and a class
 139         if(typeof purlClass.preResponse != "undefined") {
 140                 purlClass.preResponse(request, response, function() {
 141                         serviceLayout(request, response, purlClass, purlLayout);
 142                 });
 143         } else {
 144                 serviceLayout(request, response, purlClass, purlLayout);
 145         }
 146
 147         return;
 148 }
 149
 150 function serviceLayout(request, response, purlClass, purlLayout) {
 151         var reallay = "start:"+purlLayout+":end";
 152         var splitup = reallay.split("<?njs");
 153         var offset=0;
 154
 155         console.log("inservicer: ", purlLayout);
 156
 157         function processLayout() {
 158                 var output = "";
 159
 160                 console.log("begin process layout");
 161
 162                 if(offset >= splitup.length) {
 163                         //response.write("end of caller");
 164                         response.end();
 165                         return;
 166                 } else if(offset == 0) {
 167                         console.log("write for offset 0");
 168                         output = splitup[0].replace(/^start:/g, "");
 169                         if(splitup.length == 1) output = output.replace(/:end$/g, "");
 170                         console.log("did write: ", output);
 171                         response.write(output);
 172                         offset++;
 173                         processLayout();
 174                 } else {
 175                         var thispart = splitup[offset].split("?>");
 176                         var caller = thispart[0].trim();
 177
 178                         console.log("in parts for bits: ", thispart);
 179                         console.log("and caller is: ", caller);
 180
 181                         // here we resolve and call the caller....
 182                         //response.write("calling: " + caller);
 183                         resolveAndCall(request, response, caller, purlClass, function () {
 184                                 output = thispart[1].replace(/:end$/g, "");
 185                                 response.write(output);
 186                                 offset++;
 187                                 processLayout();
 188                         });
 189                 }
 190         }
 191
 192         processLayout();
 193
 194         //response.write("servicer");
 195         //response.end();
 196 }
 197
 198 function resolveAndCall(request, response, caller, purlClass, callback) {
 199         //response.write("resolving: \"" + caller + "\"");
 200
 201         // TODO: do this properly.
 202         if(typeof purlClass[caller] != "undefined") {
 203                 purlClass[caller](request, response, callback);
 204         } else if(typeof layouts[caller] != "undefined"){
 205                 layouts[caller](request, response, callback);
 206         } else {
 207                 response.write("<!-- ERROR:Undefined layout section -->");
 208                 callback();
 209         }
 210         //callback();
 211         return;
 212 }
 213
 214 function serveStatic(staticname, response) {
 215         var pathName = "./res/"+staticname;
 216         console.log("Pathname for check is ", pathName);
 217         fs.exists(pathName, function(exists) {
 218                 if(!exists) {
 219                         response.writeHead(404, {"Content-Type": "text/plain"});
 220                         response.write("404 Not Found\n");
 221                         response.end();
 222                         return;
 223                 }
 224
 225                 fs.readFile(pathName, "binary", function(err, file) {
 226                         if(err) {
 227                                 response.writeHead(500, {"Content-Type": "text/plain"});
 228                                 response.write(err + "\n");
 229                                 response.end();
 230                                 return;
 231                         }
 232
 233                         response.writeHead(200);
 234                         response.write(file, "binary");
 235                         response.end();
 236                 });
 237         });
 238 }
 239
 240 exports.wsRequest = wsRequest;