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  • ASP.NET GZip Encoding Caveats

    - by Rick Strahl
    GZip encoding in ASP.NET is pretty easy to accomplish using the built-in GZipStream and DeflateStream classes and applying them to the Response.Filter property.  While applying GZip and Deflate behavior is pretty easy there are a few caveats that you have watch out for as I found out today for myself with an application that was throwing up some garbage data. But before looking at caveats let’s review GZip implementation for ASP.NET. ASP.NET GZip/Deflate Basics Response filters basically are applied to the Response.OutputStream and transform it as data is written to it through the ASP.NET Response object. So a Response.Write eventually gets written into the output stream which if a filter is also written through the filter stream’s interface. To perform the actual GZip (and Deflate) encoding typically used by Web pages .NET includes the GZipStream and DeflateStream stream classes which can be readily assigned to the Repsonse.OutputStream. With these two stream classes in place it’s almost trivially easy to create a couple of reusable methods that allow you to compress your HTTP output. In my standard WebUtils utility class (from the West Wind West Wind Web Toolkit) created two static utility methods – IsGZipSupported and GZipEncodePage – that check whether the client supports GZip encoding and then actually encodes the current output (note that although the method includes ‘Page’ in its name this code will work with any ASP.NET output). /// <summary> /// Determines if GZip is supported /// </summary> /// <returns></returns> public static bool IsGZipSupported() { string AcceptEncoding = HttpContext.Current.Request.Headers["Accept-Encoding"]; if (!string.IsNullOrEmpty(AcceptEncoding) && (AcceptEncoding.Contains("gzip") || AcceptEncoding.Contains("deflate"))) return true; return false; } /// <summary> /// Sets up the current page or handler to use GZip through a Response.Filter /// IMPORTANT: /// You have to call this method before any output is generated! /// </summary> public static void GZipEncodePage() { HttpResponse Response = HttpContext.Current.Response; if (IsGZipSupported()) { string AcceptEncoding = HttpContext.Current.Request.Headers["Accept-Encoding"]; if (AcceptEncoding.Contains("deflate")) { Response.Filter = new System.IO.Compression.DeflateStream(Response.Filter, System.IO.Compression.CompressionMode.Compress); Response.Headers.Remove("Content-Encoding"); Response.AppendHeader("Content-Encoding", "deflate"); } else { Response.Filter = new System.IO.Compression.GZipStream(Response.Filter, System.IO.Compression.CompressionMode.Compress); Response.Headers.Remove("Content-Encoding"); Response.AppendHeader("Content-Encoding", "gzip"); } } } As you can see the actual assignment of the Filter is as simple as: Response.Filter = new DeflateStream(Response.Filter, System.IO.Compression.CompressionMode.Compress); which applies the filter to the OutputStream. You also need to ensure that your response reflects the new GZip or Deflate encoding and ensure that any pages that are cached in Proxy servers can differentiate between pages that were encoded with the various different encodings (or no encoding). To use this utility function now is trivially easy: In any ASP.NET code that wants to compress its Response output you simply use: protected void Page_Load(object sender, EventArgs e) { WebUtils.GZipEncodePage(); Entry = WebLogFactory.GetEntry(); var entries = Entry.GetLastEntries(App.Configuration.ShowEntryCount, "pk,Title,SafeTitle,Body,Entered,Feedback,Location,ShowTopAd", "TEntries"); if (entries == null) throw new ApplicationException("Couldn't load WebLog Entries: " + Entry.ErrorMessage); this.repEntries.DataSource = entries; this.repEntries.DataBind(); } Here I use an ASP.NET page, but the above WebUtils.GZipEncode() method call will work in any ASP.NET application type including HTTP Handlers. The only requirement is that the filter needs to be applied before any other output is sent to the OutputStream. For example, in my CallbackHandler service implementation by default output over a certain size is GZip encoded. The output that is generated is JSON or XML and if the output is over 5k in size I apply WebUtils.GZipEncode(): if (sbOutput.Length > GZIP_ENCODE_TRESHOLD) WebUtils.GZipEncodePage(); Response.ContentType = ControlResources.STR_JsonContentType; HttpContext.Current.Response.Write(sbOutput.ToString()); Ok, so you probably get the idea: Encoding GZip/Deflate content is pretty easy. Hold on there Hoss –Watch your Caching Or is it? There are a few caveats that you need to watch out for when dealing with GZip content. The fist issue is that you need to deal with the fact that some clients don’t support GZip or Deflate content. Most modern browsers support it, but if you have a programmatic Http client accessing your content GZip/Deflate support is by no means guaranteed. For example, WinInet Http clients don’t support GZip out of the box – it has to be explicitly implemented. Other low level HTTP clients on other platforms too don’t support GZip out of the box. The problem is that your application, your Web Server and Proxy Servers on the Internet might be caching your generated content. If you return content with GZip once and then again without, either caching is not applied or worse the wrong type of content is returned back to the client from a cache or proxy. The result is an unreadable response for *some clients* which is also very hard to debug and fix once in production. You already saw the issue of Proxy servers addressed in the GZipEncodePage() function: // Allow proxy servers to cache encoded and unencoded versions separately Response.AppendHeader("Vary", "Content-Encoding"); This ensures that any Proxy servers also check for the Content-Encoding HTTP Header to cache their content – not just the URL. The same thing applies if you do OutputCaching in your own ASP.NET code. If you generate output for GZip on an OutputCached page the GZipped content will be cached (either by ASP.NET’s cache or in some cases by the IIS Kernel Cache). But what if the next client doesn’t support GZip? She’ll get served a cached GZip page that won’t decode and she’ll get a page full of garbage. Wholly undesirable. To fix this you need to add some custom OutputCache rules by way of the GetVaryByCustom() HttpApplication method in your global_ASAX file: public override string GetVaryByCustomString(HttpContext context, string custom) { // Override Caching for compression if (custom == "GZIP") { string acceptEncoding = HttpContext.Current.Response.Headers["Content-Encoding"]; if (string.IsNullOrEmpty(acceptEncoding)) return ""; else if (acceptEncoding.Contains("gzip")) return "GZIP"; else if (acceptEncoding.Contains("deflate")) return "DEFLATE"; return ""; } return base.GetVaryByCustomString(context, custom); } In a page that use Output caching you then specify: <%@ OutputCache Duration="180" VaryByParam="none" VaryByCustom="GZIP" %> To use that custom rule. It’s all Fun and Games until ASP.NET throws an Error Ok, so you’re up and running with GZip, you have your caching squared away and your pages that you are applying it to are jamming along. Then BOOM, something strange happens and you get a lovely garbled page that look like this: Lovely isn’t it? What’s happened here is that I have WebUtils.GZipEncode() applied to my page, but there’s an error in the page. The error falls back to the ASP.NET error handler and the error handler removes all existing output (good) and removes all the custom HTTP headers I’ve set manually (usually good, but very bad here). Since I applied the Response.Filter (via GZipEncode) the output is now GZip encoded, but ASP.NET has removed my Content-Encoding header, so the browser receives the GZip encoded content without a notification that it is encoded as GZip. The result is binary output. Here’s what Fiddler says about the raw HTTP header output when an error occurs when GZip encoding was applied: HTTP/1.1 500 Internal Server Error Cache-Control: private Content-Type: text/html; charset=utf-8 Date: Sat, 30 Apr 2011 22:21:08 GMT Content-Length: 2138 Connection: close ?`I?%&/m?{J?J??t??` … binary output striped here Notice: no Content-Encoding header and that’s why we’re seeing this garbage. ASP.NET has stripped the Content-Encoding header but left our filter intact. So how do we fix this? In my applications I typically have a global Application_Error handler set up and in this case I’ve been using that. One thing that you can do in the Application_Error handler is explicitly clear out the Response.Filter and set it to null at the top: protected void Application_Error(object sender, EventArgs e) { // Remove any special filtering especially GZip filtering Response.Filter = null; … } And voila I get my Yellow Screen of Death or my custom generated error output back via uncompressed content. BTW, the same is true for Page level errors handled in Page_Error or ASP.NET MVC Error handling methods in a controller. Another and possibly even better solution is to check whether a filter is attached just before the headers are sent to the client as pointed out by Adam Schroeder in the comments: protected void Application_PreSendRequestHeaders() { // ensure that if GZip/Deflate Encoding is applied that headers are set // also works when error occurs if filters are still active HttpResponse response = HttpContext.Current.Response; if (response.Filter is GZipStream && response.Headers["Content-encoding"] != "gzip") response.AppendHeader("Content-encoding", "gzip"); else if (response.Filter is DeflateStream && response.Headers["Content-encoding"] != "deflate") response.AppendHeader("Content-encoding", "deflate"); } This uses the Application_PreSendRequestHeaders() pipeline event to check for compression encoding in a filter and adjusts the content accordingly. This is actually a better solution since this is generic – it’ll work regardless of how the content is cleaned up. For example, an error Response.Redirect() or short error display might get changed and the filter not cleared and this code actually handles that. Sweet, thanks Adam. It’s unfortunate that ASP.NET doesn’t natively clear out Response.Filters when an error occurs just as it clears the Response and Headers. I can’t see where leaving a Filter in place in an error situation would make any sense, but hey - this is what it is and it’s easy enough to fix as long as you know where to look. Riiiight! IIS and GZip I should also mention that IIS 7 includes good support for compression natively. If you can defer encoding to let IIS perform it for you rather than doing it in your code by all means you should do it! Especially any static or semi-dynamic content that can be made static should be using IIS built-in compression. Dynamic caching is also supported but is a bit more tricky to judge in terms of performance and footprint. John Forsyth has a great article on the benefits and drawbacks of IIS 7 compression which gives some detailed performance comparisons and impact reviews. I’ll post another entry next with some more info on IIS compression since information on it seems to be a bit hard to come by. Related Content Built-in GZip/Deflate Compression in IIS 7.x HttpWebRequest and GZip Responses © Rick Strahl, West Wind Technologies, 2005-2011Posted in ASP.NET   IIS7  

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  • wild card redirects issue giving error this webpage has a redirect loop

    - by david
    In my website I changed or better word modified the directory name ""vehicles-cars"" to ""vehicles-cars-for-sale"" when i tried to redirect using wild card redirect my old directory name to new directory name in my web hosting cpanel account. every time when i open pages from that directory i am getting error code. This web-page has a redirect loop. The website is php. The problem is that that my lots of pages from old directory are indexed in googles and they are getting duplicate contents. If I redirect single page it works perfect but there are lots of pages so I need wild card redirect to redirect whole directory . I really need some advice what to do with this problem. Here is .htaccess file code for redirect thanks RewriteEngine on RewriteCond %{HTTP_HOST} ^example\.com$ [OR] RewriteCond %{HTTP_HOST} ^www\.example\.com$ RewriteRule ^vehicles\-cars\/?(.*)$ "http\:\/\/example\.com\/vehicles\-cars\-for\-sale\/$1" [R=301,L] i have other wilcard redirect of whole directory with same code and its working perfect here is the code in .htaccss file which is same as above and working perfect for this directory RewriteCond %{HTTP_HOST} ^adsbuz\.com$ [OR] RewriteCond %{HTTP_HOST} ^www\.adsbuz\.com$ RewriteRule ^autos\/?(.*)$ "http\:\/\/adsbuz\.com\/vehicles\-cars\-for\-sale\/$1" [R=301,L] so i dont understand whats wrong with the above code please i really need some expert advice thanks again

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  • .htaccess: Redirect Hotlink Flash --> Site with embed Flash

    - by user5571
    I have some .php sites that embeds .swf files. These .swf files are now linked to by some other guys. And I don't want them to simply open the SWF, I want them to force being redirect to the page where the flash is embed. Data: Site: www.example.com/1 (www.example.com/2, www.example.com/3 and so on) Flash: www.example.com/flash/flash_NUMBER.swf So for www.example.com/1: Site: www.example.com/1 Flash: www.example.com/flash/flash_1.swf I now want to redirect the user who types "www.example.com/flash/flash_1.swf" into his URL to be redirect to www.example.com/1. The Problem I have that the flash needs to be still accesseable via www.example.com/1 <-- I don't get that working (the Flash is embed into that page). The tool I would like to use for this is the .htaccess & RewriteRule. I hope someone can help me out.

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  • 301 redirect, keyword being in bold

    - by seo-man
    Regarding 301; If I redirect nonwww to www domain with 301 redirect, do I still have to determinate inside google webmaster tools which version (www or nonwww) is prefered? Or is setting up redirect enough so therefore I don't need to determinate that inside GWT? Regarding keyword being in bold: Usually keywords are supposted to be in bold font and it is irrelevant if they are links or not. But in heading (h1, h2); does there keyword also need to be in bold or is it enough if I care to put it to the beginning of heading? So elsehow asked; Does the keyword in heading need to be in bold font also?

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  • Does redirect popup window affect SEO?

    - by Joseph
    We have multiple websites, each site servers number of countries, and we used to have Geo-Ip Auto redirect system (no one likes auto-redirect), so we implemented another redirect system also uses Geo-IP database, but showing a pop-up window (HTML layer pop-up, so it can't be rejected), this window asks the visitor if he would like to continue with this page or go to the correct website of his country. We also added a test line before showing the pop-up, so if the visitor is Googlebot, the popup will not show up :). I was wondering if this effects our websites SEO?

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  • Temporary website redirect: 3xx or php/meta?

    - by Damien Pirsy
    Hi, I run a (small) news website which has also a forum in a subfolder of the root. I'm planning to give the site a facelift and a code restructuration, so I wanted to put some redirect on the home page that will point directly to forum's index (www.mysite.com -- www.mysite.com/forum) while I tinker with it. And that, given the little free time I have, will take no less than a couple of month. Being a news site I'm pretty sure that would affect it's overall ranking, but I need to do it, so: which is the best way to redirect? I pondered and read here and there about the different means, but I couldn't figure out which is worst for SEO. Do I use a 302 redirect or use "Location:newurl" in page headers using php? Or I just put a meta tag in the html page (or a javascript, what's better). Sorry but I'm not really into these things, I may have said something silly, I know... Thanks

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  • sudo & redirect output

    - by Khaled
    I have a small question regarding using sudo with output redirect >. To enable IP forwrding, someone can use the command: $ echo 1 > /proc/sys/net/ipv4/ip_forward Executing this command will give permission denied as it requires root privileges. However, executing the same command with sudo gives also permission denied error! It seems that output redirect > does not inherit the permissions of the preceding command echo. Is this right? As a workaround I do: $ echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward Is this the best way to do it? Am I missing something? Please, note that this is an example and it applies to all commands that use output redirect.

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  • Switching to HTTPS - redirect question

    - by seengee
    Following the recent Google announcements about improved ranking for sites running on https we have a number of clients asking about this. Is it safe to just 301 redirect all pages to their SSL equivalent, for example in a common PHP include file: if($_SERVER['HTTPS']!="on"){ $redirect= "https://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; header("Location:$redirect",true,301); exit(); } Obviously I'm aware this is also possible within a .htaccess file but that cannot be modified in our case. Obviously all internal links would be switched to https:// links but obviously we need to sort out incoming links from Google and elsewhere. Is this a sound approach? Are there any other gotchas to be aware of?

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  • SEO: 301 for a page which has no mirrow path?

    - by Alex
    Hello, I just did a 301 and the domain and some pages which have a mirror file path are fine. But I have one directory which is not going to be part of the new site and I don't know how to redirect the old files that were there. I need something like this: oldDomain/oldDir/file.php and I need to make it redirect to newDomain/differentDir/file.php Is that possible? What is the 301 redirect rule for that? update I just added this rule as suggested by @Itai and it didn't work redirectMatch permanent ^/outdoors/trees/tanoak.php$ http://www.comehike.com/outdoors/trees/129/Tanoak any idea why?

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  • 301 redirect to 404 page?

    - by Kristian
    Currently i'm migrating www. prefix from my urls and use htaccess to do the job. Since we have new software and cleaned database some of the old urls doesnt exists anymore. Therefore some requests redirect to 404 page. 1. www.domain.com/old-page # htaccess redirect to non-www url, 301 2. domain.com/old-page # page does not exists, 404 Does this method have any SEO issues, or even affect pagerank? Or should i check the page existence before redirecting and show 404 without redirect?

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  • 301 Page Redirect

    - by Thomas Ojo
    I was reading about this article - SEO preference for WWW or HTTP:// protocol redirection? Do www websites rank better than NON-www? I have same problem but I needed a help on this further. What about https:// How will this be treated? Is the redirect 301 sufficient to solve the problem? I have a SEO company that says if possible, i should not have redirect but I don't think this is visible? Does permanent redirect in any way have effect on SEO services if properly done? I will appreciate any help. Thank you

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  • How to append to an XML response an error attribute using Ruby on Rails 3?

    - by user502052
    I am trying to implement REST APIs, so in my RoR3 application I have XML responses. Before to pass to a consumer the XML, I wuold like to check if there are errors and, if so, send back a response with error messages. I read "Active Record Validations and Callbacks" guides on the RoR website, but it seems not work in my case. I extract from the database a resource doing @response = User.find_by_id(1) and I wuold like, if possible, to add error to it. Seeing some examples I have seen how to report errors in an XML file format.xml { render :xml => @response.errors } but how I can add append new errors to the @response? Maybe something like this: errors.add(:password, "is invalid")

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  • Redirect as a backup trick? w/o modifying DNS?

    - by acidzombie24
    I specifically looked up how to do something like this ( Can you set a backup ip for your server in DNS? ) and the answer basically was you can't. If i say specify 2 ip addresses could i somehow use a HTTP response header to ignore it temporary (say 5mins) and go to the other IP address? Or maybe i can play dead however i'm unsure how to play dead using nginx. I then would like to be available after my box notice the other box is down and be some kind of readonly server. I'm sure something like this has been implemented i am just wondering how i might implement it with 2 boxes. I'm sure it isn't very difficult? How might i redirect traffic from a backup box to my main server without modifying the DNS?

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  • Is it possible to redirect/bounce TCP traffic to external destination, base on rules?

    - by xfx
    I'm not even sure if this is possible... Also, please forgive my ignorance on the subject. What I'm looking for is for "something" that would allow me to redirect all TCP traffic arriving to host A to host B, but based on some rules. Say host A (the intermediary) receives a request (say a simple HTTP request) from a host with domain X. In that case, it lets it pass through and it's handled by host A itself. Now, let's suppose that host A receives another HTTP request from a host with domain Y, but this time, due to some customizable rules, host A redirects all the traffic to host B, and host B is able to handle it as if came directly from domain Y. And, at this point, both host B and the host with domain Y are able to freely communicate (of course, thought host A). NOTE: All these hosts are on the Internet, not inside a LAN. Please, let me know if the explanation is not clear enough.

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  • When to use HTTP status code 404 in an API

    - by Sybiam
    I am working on a project and after arguing with people at work for about more than a hour. I decided to know what people on stack-exchange might say. We're writing an API for a system, there is a query that should return a tree of Organization or a tree of Goals. The tree of Organization is the organization in which the user is present, In other words, this tree should always exists. In the organization, a tree of goal should be always present. (that's where the argument started). In case where the tree doesn't exist, my co-worker decided that it would be right to answer response with status code 200. And then started asking me to fix my code because the application was falling apart when there is no tree. I'll try to spare flames and fury. I suggested to raise a 404 error when there is no tree. It would at least let me know that something is wrong. When using 200, I have to add special check to my response in the success callback to handle errors. I'm expecting to receive an object, but I may actually receive an empty response because nothing is found. It sounds totally fair to mark the response as a 404. And then war started and I got the message that I didn't understand HTTP status code schema. So I'm here and asking what's wrong with 404 in this case? I even got the argument "It found nothing, so it's right to return 200". I believe that it's wrong since the tree should be always present. If we found nothing and we are expecting something, it should be a 404. More info, I forgot to add the urls that are fetched. Organizations /OrgTree/Get Goals /GoalTree/GetByDate?versionDate=... /GoalTree/GetById?versionId=... My mistake, both parameters are required. If any versionDate that can be parsed to a date is provided, it will return the closes revision. If you enter something in the past, it will return the first revision. If by Id with a id that doesn't exists, I suspect it's going to return an empty response with 200. Extra Also, I believe the best answer to the problem is to create default objects when organizations are created, having no tree shouldn't be a valid case and should be seen as an undefined behavior. There is no way an account can be used without both trees. For that reasons, they should be always present. also I got linked this (one similar but I can't find it) http://viswaug.files.wordpress.com/2008/11/http-headers-status1.png

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  • How to block/redirect hosts and subdomains of a host using htaccess?

    - by Sven
    I want to block several host-domains and their subdomains, as well as IP-Adresses using htaccess. So far I added to my .htaccess-file: # block doamins and all subdomains Deny from .example.org # block domainrange: 1.2.3.[1-255] Deny from 1.2.3. # Block single IP Deny from 2.3.4.5 but still I had problems with spam from e.g. server1.example.org. What is wrong with my script? Is it also possible to redirect all requests from certain hosts/IPs to a document (say: info.html)?

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  • How can I redirect URLs using the proxy module in Apache?

    - by LearningIT
    This seems like a super-basic question but I am having a hard time tracking down a straightforward solution, so appreciate any help and patience with me on this: I want to configure my Apache proxy server to redirect certain URLs so that, for example, a web browser HTTP request for www.olddomain.com gets passed to the proxy server which then routes the request to www.newdomain.com which sends a response to the proxy server which then passes it back to the web browser. Seems so simple, yet I don't see how to achieve this on Apache. I know Squid/Squirm offer this functionality so am guessing I am missing something really basic. I know I can use RewriteRule to dynamically modify the URL and pass it to the proxy server, but I effectively want to do the reverse, whereby the proxy server receives the original URL, applies the RewriteRule, and then forwards the HTTP request to the new URL. Hope that makes sense. Thanks in advance for any help.

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  • How can I redirect HTTPS(S) traffic to anothr gateway?

    - by PsyStyle
    I have a network like 192.168.0.0/15 with the default gateway set to 192.168.0.1. Al the workstations of the network use this gateway for all kind of accesses to the Internet. Now I am testing a new Internet connection with another provider and for this I am using a second gateway on the same subnet with 192.168.0.2 as IP address. I want to redirect only HTTP and HTTPS traffic to this second gateway without touching the address of the default gateway set inside every workstation. How can I accomplish this task? What I have to change inside the first's gateway firewall configuration or routes? I tried with a dnat like DNAT loc:192.168.0.1 loc:192.168.0.2 tcp 80 but nothing worked. I use Shorewall for simplicity in configuration but I can understand even theorical answers which I will try to adapt to my case

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  • How do I redirect a url request to wordpress using htaccess? [on hold]

    - by hitautodestruct
    I've searched far and wide for a solution to this and I am sure it's simple but I simply couldn't find a solution. This is the default Wordpress redirect code that sits in my htaccess file: <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> How do I make it so that this will always route the url request to https://? Note: I am terrible at speaking Apache.

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  • Is it possible to redirect/bounce TCP traffic to an external destination, based on rules?

    - by xfx
    I'm not even sure if this is possible... Also, please forgive my ignorance on the subject. What I'm looking for is for "something" that would allow me to redirect all TCP traffic arriving to host A to host B, but based on some rules. Say host A (the intermediary) receives a request (say a simple HTTP request) from a host with domain X. In that case, it lets it pass through and it's handled by host A itself. Now, let's suppose that host A receives another HTTP request from a host with domain Y, but this time, due to some customizable rules, host A redirects all the traffic to host B, and host B is able to handle it as if came directly from domain Y. And, at this point, both host B and the host with domain Y are able to freely communicate (of course, thought host A). NOTE: All these hosts are on the Internet, not inside a LAN. Please, let me know if the explanation is not clear enough.

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  • How can I redirect HTTP(S) traffic to another gateway?

    - by PsyStyle
    I have a network like 192.168.0.0/15 with the default gateway set to 192.168.0.1. All the workstations of the network use this gateway for all kind of accesses to the Internet. Now I am testing a new Internet connection with another provider and for that I'm using a second gateway on the same subnet with 192.168.0.2 as IP address. I want to redirect only HTTP and HTTPS traffic to this second gateway keeping untouched the address of the default gateway set inside every workstation. How can I accomplish this task? What I have to change inside the first's gateway firewall configuration or routes? I tried with a DNAT like: DNAT loc:192.168.0.1 loc:192.168.0.2 tcp 80 but nothing worked. I use Shorewall for simplicity in configuration but I can understand even theorical answers which I will try to adapt to my case.

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  • How to find source of 301/302 redirect loop? Heroku GoDaddy Zerigo

    - by user179288
    this should be a relatively simple problem but I'm having trouble.I hope this is the right forum to post on as I've seen people get booted off stack-overflow for this sort of thing. I've setup a web app on heroku (cedar stack) at my-web-app.herokuapp.com and I'm trying to direct my-domain.com and www.my-domain.com to it. As per instructions on the heroku documentation, I've set my-domain.com to redirect (forwarding) to www.my-domain.com and then set a C-Name from www.my-domain.com to my-web-app.herokuapp.com. But the C-Name doesn't seem to be working right and is sending back to my-domain.com, causing a loop and I can't work out why. I first configured these setting at GoDaddy.com where I registered the domain but then tried to avoid the problem by using Heroku's Zerigo DNS add-on, setting the nameservers on GoDaddy to the ones given for Zerigo. However the problem remains. Here is the output from dig for my-domain.com ("drop-circles.com"): ; <<>> DiG 9.3.2 <<>> any drop-circles.com ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 671 ;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 5 ;; QUESTION SECTION: ;drop-circles.com. IN ANY ;; ANSWER SECTION: drop-circles.com. 433 IN NS b.ns.zerigo.net. drop-circles.com. 433 IN NS d.ns.zerigo.net. drop-circles.com. 433 IN NS e.ns.zerigo.net. drop-circles.com. 433 IN NS a.ns.zerigo.net. drop-circles.com. 433 IN NS c.ns.zerigo.net. drop-circles.com. 433 IN SOA a.ns.zerigo.net. hostmaster.zerigo.com. 1372250760 10800 3600 604800 900 drop-circles.com. 433 IN A 64.27.57.29 drop-circles.com. 433 IN A 64.27.57.24 ;; ADDITIONAL SECTION: d.ns.zerigo.net. 68935 IN A 174.36.24.250 e.ns.zerigo.net. 69015 IN A 72.26.219.150 a.ns.zerigo.net. 72602 IN A 64.27.57.11 c.ns.zerigo.net. 69204 IN A 109.74.192.232 b.ns.zerigo.net. 70549 IN A 174.37.229.229 ;; Query time: 15 msec ;; SERVER: 194.168.4.100#53(194.168.4.100) ;; WHEN: Wed Jun 26 14:29:07 2013 ;; MSG SIZE rcvd: 293 Here is the output from dig for www.my-domain.com ("www.drop-circles.com"): ; <<>> DiG 9.3.2 <<>> any www.drop-circles.com ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1608 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.drop-circles.com. IN ANY ;; ANSWER SECTION: www.drop-circles.com. 407 IN CNAME drop-circles-website.herokuapp.com. ;; Query time: 19 msec ;; SERVER: 194.168.4.100#53(194.168.4.100) ;; WHEN: Wed Jun 26 14:29:15 2013 ;; MSG SIZE rcvd: 83 And from Fiddler if I use the inspector when I try either address I get a series of requests, with the my-domain.com ("drop-circles.com") looking like this: Request: GET http://drop-circles.com/ HTTP/1.1 Accept: text/html, application/xhtml+xml, */* Accept-Language: en-gb User-Agent: Opera/9.80 (Windows NT 5.1; U; Edition IBIS; Trident/5.0) Accept-Encoding: gzip, deflate Connection: Keep-Alive Host: drop-circles.com Response: HTTP/1.1 302 Found Server: nginx/0.8.54 Date: Wed, 26 Jun 2013 13:26:55 GMT Content-Type: text/html;charset=utf-8 Connection: keep-alive Status: 302 Found Location: http://www.drop-circles.com/ Content-Length: 113 <html><body>Redirecting to <a href="http://www.drop-circles.com/">http://www.drop-circles.com/</a></body></html> And the www.my-domain.com ("www.drop-circles.com") looking like this: Request: GET http://www.drop-circles.com/ HTTP/1.1 Accept: text/html, application/xhtml+xml, */* Accept-Language: en-gb User-Agent: Opera/9.80 (Windows NT 5.1; U; Edition IBIS; Trident/5.0) Accept-Encoding: gzip, deflate Connection: Keep-Alive Host: www.drop-circles.com Response: HTTP/1.1 301 Moved Permanently Content-Type: text/html Date: Wed, 26 Jun 2013 13:26:56 GMT Location: http://drop-circles.com/ Vary: Accept X-Powered-By: Express Content-Length: 104 Connection: keep-alive <p>Moved Permanently. Redirecting to <a href="http://drop-circles.com/">http://drop-circles.com/</a></p> Any and all help would be greatly appreciated. If it is not at all obvious from these readouts what it might be could someone at least tell me which company GoDaddy, Zerigo or Heroku should I go to for support since I don't really know enough to be able to say where the problem lies. Thank you.

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  • Django HttpResponseRedirect acting as proxy rather than 302

    - by Trevor Burnham
    I have a Django method that's returning return HttpResponseRedirect("/redirect-target") When running the server locally, if I visit the page that returns that redirect, I get the log output [17/Oct/2013 15:26:02] "GET /redirecter HTTP/1.1" 302 0 [17/Oct/2013 15:26:02] "GET /redirect-target HTTP/1.1" 404 0 as expected. But, when I visit that page in Chrome, the Network tab shows the request to /redirecter with the response from /redirect-target, rather than showing the 302. cURL does the same: $ curl -I -X GET http://localhost/redirecter HTTP/1.1 404 Not Found date: Thu, 17 Oct 2013 19:32:30 GMT connection: keep-alive transfer-encoding: chunked In production, the same Django code does show a 302 redirect in Chrome and cURL. What could be going on here? Is there some kind of Django setting that might be causing it to proxy the target rather than send a redirect when HttpResponseRedirect is used (but lie about it in the log)? Or is there a quirk on my system (OS X) that might cause localhost redirects to behave this way?

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  • How can I log the response header and body in apache?

    - by acme
    I need to determine whether the server (Apache 2) is returning the full contents of a page along with its correct header or not. I have a PHP-script that is executed successfully, but the browser is getting only half of the html content, it's simply cut off. The client infrastructure is pretty complicated, using Novell BorderManager Proxys and stuff. To ensure the server is doing its job fine I want to log both header and body of the reponse. How can I achieve this? I looked into the mod_log_config module of apache (which is already installed and ready to be used), but honestly I didn't quite manage to configure it to output header and body somewhere. edit: I managed to log the header with LogFormat "%h %l %u %t \"%r\" %s %b \"%{HEADER_NAME}o\"" common2 CustomLog /var/log/apache2/response.log common2 But unfortunately the mod_log_config formats don't support the whole content body. Can anyone help?

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  • How to maintain form state after Post-Redirect-Get in ASP.net?

    - by Ian Boyd
    Imagine a page with a form input: Search Criteria: crackers                   From: [email protected]           To: [email protected]       Subject: How to maintain form state with PRG? Message: Imagine a page with form input:                         Send After the user clicks Send, the server will instruct to client to Redirect, as part of the Post-Redirect-Get pattern. POST /mail/u/compose HTTP/1.1 303 See Other Location: http://stackoverflow.com/mail/u/compose And the client will issue a GET of the new page. The problem is that some elements of the existing form are lost: Search Criteria:                    It gets worse when there are a few drop-downs, and checkboxes. How can i maintain form state in using Post-Redirect-Get in ASP.net, given that the viewstate is then non-existent. Bonus Reading ASP.NET: How to redirect, prefilling form data?

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