How to get the full url in Express

Question

Let s say my sample url is     http   example com one two   and I say I have the following route  app get   one two   function  req  res        var url   req url      The value of url will be  one two   How do I get the full url in Express   For example  in the case above  I would like to receive http   example com one two

User · Answer

My code looks like this    params  host url     req protocol           req headers host   req url

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You need to construct it using req headers host   req url   Of course if you are hosting in a different port and such you get the idea  -

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Use this   var url   req headers host         req url

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make req host req hostname effective must have two condition when Express behind proxies    app set  trust proxy    loopback    in app js X-Forwarded-Host header must specified by you own in webserver  eg  apache  nginx   nginx   server       listen myhost 80      server name  myhost      location             root  path to myapp public          proxy set header X-Forwarded-Host  host  server port          proxy set header X-Forwarded-Server  host          proxy set header X-Forwarded-For  proxy add x forwarded for          proxy pass http   myapp 8080            apache    lt VirtualHost myhost 80 gt      ServerName myhost     DocumentRoot  path to myapp public     ProxyPass   http   myapp 8080      ProxyPassReverse   http   myapp 8080   lt  VirtualHost gt

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I use the node package  url   npm install url   What it does is when you call   url parse req url  true  true    it will give you the possibility to retrieve all or parts of the url  More info here  https   github com defunctzombie node-url  I used it in the following way to get whatever comes after the   in http   www example com  to use as a variable and pull up a particular profile  kind of like facebook  http   www facebook com username       var url   require  url        var urlParts   url parse req url  true  true       var pathname   urlParts pathname      var username   pathname slice 1     Though for this to work  you have to create your route this way in your server js file   self routes    username     require    routes users      And set your route file this way   router get    username   function req  res       here comes the url parsing code

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Instead of concatenating the things together on your own  you could instead use the node js API for URLs and pass URL format   the informations from express   Example   var url   require  url     function fullUrl req      return url format       protocol  req protocol      host  req get  host        pathname  req originalUrl

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async function  request  response  next      const url   request rawHeaders 9    request originalUrl      or   const url   request headers host   request originalUrl

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Here is a great way to add a function you can call on the req object to get the url    app use function req  res  next        req getUrl   function           return req protocol           req get  host     req originalUrl            return next            Now you have a function you can call on demand if you need it

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Thank you all for this information  This is incredibly annoying    Add this to your code and you ll never have to think about it again   var app   express     app all      function  req  res  next        runs on ALL requests     req fullUrl   req protocol           req get  host     req originalUrl         next        You can do or set other things there as well  such as log to console

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I would suggest using originalUrl instead of URL   var url   req protocol           req get  host     req originalUrl    See the description of originalUrl here  http   expressjs com api html req originalUrl  In our system  we do something like this  so originalUrl is important to us     foo   express      express   use   foo   foo     foo use require   foo blah controller       blah controller looks like this     controller   express      module exports   controller    controller get   bar  barparam   function req  res       handler code          So our URLs have the format   www example com foo bar  barparam   Hence  we need req originalUrl in the bar controller get handler

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var full address   req protocol           req headers host   req originalUrl    or  var full address   req protocol           req headers host   req baseUrl

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I found it a bit of a PITA to get the requested url  I can t believe there s not an easier way in express  Should just be req requested url  But here s how I set it   var port   req app settings port    cfg port  res locals requested url   req protocol           req host      port    80    port    443            port     req path

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The protocol is available as req protocol  docs here   Before express 3 0  the protocol you can assume to be http unless you see that req get  X-Forwarded-Protocol   is set and has the value https  in which case you know that s your protocol  The host comes from req get  host   as Gopal has indicated Hopefully you don t need a non-standard port in your URLs  but if you did need to know it you d have it in your application state because it s whatever you passed to app listen at server startup time  However  in the case of local development on a non-standard port  Chrome seems to include the port in the host header so req get  host   returns localhost 3000  for example  So at least for the cases of a production site on a standard port and browsing directly to your express app  without reverse proxy   the host header seems to do the right thing regarding the port in the URL  The path comes from req originalUrl  thanks  pgrassant   Note this DOES include the query string  docs here on req url and req originalUrl  Depending on what you intend to do with the URL  originalUrl may or may not be the correct value as compared to req url    Combine those all together to reconstruct the absolute URL     var fullUrl   req protocol           req get  host     req originalUrl

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Just the code below was enough for me   const baseUrl      request protocol      request headers host       http   127 0 0 1 3333

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Using url format   var url   require  url      This support all protocols and include port number  If you don t have a query string in your originalUrl you can use this cleaner solution   var requrl   url format       protocol  req protocol      host  req get  host        pathname  req originalUrl        If you have a query string   var urlobj   url parse req originalUrl   urlobj protocol   req protocol  urlobj host   req get  host    var requrl   url format urlobj

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You can use this function in the route like this  app get   one two   function  req  res        const url   getFullUrl req             Gets the self full URL from the request         param  object  req Request     returns  string  URL     const getFullUrl    req    gt     req protocol      req headers host   req originalUrl      req protocol will give you http or https  req headers host will give you the full host name like www google com  req originalUrl will give the rest pathName in your case  one two

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