Node JS Tutorials from learnyounode

CollectHttpMod.js

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+module.exports = function(url, callback){
+
+    var http = require('http');
+
+    var allData = "";
+
+    http.get(url, function(response){
+
+        response.setEncoding('utf8');
+        response.on('data', function(data){
+            allData = allData + data;
+        });
+
+        response.on("end", function(){
+            callback(null, allData);
+        });
+
+        response.on("error", function(err){
+            callback(err);
+        });
+    });
+
+};

asyncJuggling.js

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+var collect = require('./CollectHttpMod');
+
+var allData = [];
+var responseCount = 0;
+
+var onComplete = function(){
+        if (responseCount === 3){
+            for (var data in allData){
+                //console.log("NEXT");
+                console.log(allData[data]);
+            }
+        }
+};
+
+collect(process.argv[2], function(err, data){
+    if(err){
+        console.log("Error Server 1");
+    }{
+        allData[0] = data;
+        responseCount ++;
+        onComplete();
+    }
+
+});
+
+collect(process.argv[3], function(err, data){
+    if(err){
+        console.log("Error Server 2");
+    }{
+        allData[1] = data;
+        responseCount ++;
+        onComplete();
+    }
+
+});
+
+collect(process.argv[4], function(err, data){
+    if(err){
+        console.log("Error Server 3");
+    }{
+        allData[2] = data;
+        responseCount ++;
+        onComplete();
+    }
+
+});

calcNumbers.js

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+var vars = process.argv.slice(2);
+
+//console.log(process.argv);
+var result = 0;
+for ( var arg in vars ){
+
+    var number = Number(vars[arg]);
+    if (number){
+        result = result + number;
+        //console.log(result);
+
+    }
+}
+
+console.log(result);

countNewLines.js

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+var fs = require('fs');
+
+var path = process.argv[2];
+
+var buf = fs.readFileSync(path);
+
+var content = buf.toString();
+var lines = content.split('\n');
+
+console.log(lines.length -1);

countNewLinesAsync.js

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+var fs = require('fs');
+
+var path = process.argv[2];
+
+var buf = fs.readFile(path, 'utf8', function (err, content) {
+    if (!err){
+        var lines = content.split('\n');
+        console.log(lines.length -1);
+    }
+});

helloWorldHttp.js

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+var http = require('http');
+
+var server = http.createServer(function(req, res) {
+  res.writeHead(200);
+  res.end('Hello Http');
+
+});
+server.listen(8080);

hlloWorldLog.js

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+console.log("HELLO WORLD");

httpCollect.js

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+var http = require('http');
+
+var allData = "";
+
+http.get(process.argv[2], function(response){
+
+    response.setEncoding('utf8');
+    response.on('data', function(data){
+        allData = allData + data;
+    });
+
+    response.on("end", function(){
+        console.log(allData.length);
+        console.log(allData);
+    });
+
+    response.on("error", function(err){
+        console.log("Error " + err);
+    });
+});

httpFileServer.js

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+var http = require('http');
+var fs = require('fs');
+
+var server = http.createServer(function (req, res) {
+    var fStream = fs.createReadStream(process.argv[3]);
+    fStream.pipe(res);
+});
+server.listen(process.argv[2]);

httpGet.js

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+var http = require('http');
+
+http.get(process.argv[2], function(response){
+
+    response.setEncoding('utf8');
+    response.on('data', function(data){
+        console.log(data);
+    });
+
+    response.on("error", function(err){
+        console.log("Error " + err);
+    });
+});

httpJsonServer.js

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+var http = require('http');
+var url = require('url');
+var parsedUrl;
+
+var server = http.createServer(function (req, res) {
+    parsedUrl = url.parse(req.url, true);
+//    console.log(parsedUrl);
+    var date = new Date(parsedUrl.query.iso);
+    res.writeHead(200, {'Content-Type': 'application/json'});
+    switch(parsedUrl.pathname){
+        case '/api/parsetime':
+            res.end(JSON.stringify({
+                    hour : date.getHours(),
+                    minute : date.getMinutes(),
+                    second : date.getSeconds()
+            }));
+            break;
+
+        case '/api/unixtime':
+            res.end(JSON.stringify({
+                unixtime : date.getTime()
+            }));
+            break;
+    }
+});
+server.listen(process.argv[2]);

httpUppercaser.js

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+var http = require('http');
+var map = require('through2-map');
+
+var server = http.createServer(function (req, res) {
+    if(req.method === 'POST'){
+        req.pipe(map(function(chunk){
+            return chunk.toString().toUpperCase();
+        })).pipe(res);
+    }
+});
+server.listen(process.argv[2]);

listDir.js

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+var fs = require('fs');
+
+var filter = '.' + process.argv[3];
+
+//console.log(filter);
+fs.readdir(process.argv[2], function(err, list){
+    for (var item in list){
+        if (String(list[item]).indexOf(filter) > -1){
+            console.log(list[item]);
+        }
+    }
+});

listDirModule.js

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+module.exports = function(path, filter, callback){
+    var fs = require('fs');
+
+    var matchingFiles = [];
+    //console.log(filter);
+    fs.readdir(path, function(err, list){
+        if (err)
+            return callback(err);
+        for (var item in list){
+            if (String(list[item]).indexOf('.' + filter) > -1){
+                matchingFiles.push(list[item]);
+            }
+        }
+        callback(null,matchingFiles);
+    });
+};

listDirModules.js

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+var myMod = require("./listDirModule");
+
+
+myMod(process.argv[2], process.argv[3], function(err, files){
+    if(err){
+        console.log("Error");
+    }{
+        for ( var file in files){
+            console.log(files[file]);
+        }
+    }
+});