I wrote about the basics of how DSPs, SSPs, and Ad Exchanges work from a high level and the value they add to the marketplace in my last post – for this piece we. SEO wise. We find redirects on every Web site out there. They’re often performed unnoticed in the background, unintentionally messed up, implemented with a great deal of ignorance, but seldom perfect from a SEO perspective. Unfortunately, the Webmaster boards are flooded with contradictorily, misleading and plain false advice on redirects. If you for example read “for SEO purposes you must make use of 3. A 3. 02 or 3. 07 redirect can be search engine friendly too. With this post I do plan to bore you to death. So lean back, grab some popcorn, and stay tuned for a longish piece explaining the Interweb’s forwarding requests as dull as dust. Or, if you know everything about redirects, then please digg, sphinn and stumble this post before you surf away. Thanks. Redirects are defined in the HTTP protocol, not in search engine guidelines. For the moment please forget everything you’ve heard about redirects and their SEO implications, clear your mind, and follow me to the very basics defined in the HTTP protocol. Of course search engines interpret some redirects in a non- standard way, but understanding the norm as well as its use and abuse is necessary to deal with server sided redirects. I don’t bother with outdated HTTP 1. I’ll discuss the 3. HTTP 1. 1 too. For information on client sided redirects please refer to Meta Refresh - the poor man’s 3. Java. Script URL manipulations.
What is a server sided redirect? Think about an HTTP redirect as a forwarding request. Although redirects work slightly different from snail mail forwarding requests, this analogy perfectly fits the procedure. Whilst with US Mail forwarding requests a clerk or postman writes the new address on the envelope before it bounces in front of a no longer valid respectively temporarily abandoned letter- box or pigeon hole, on the Web the request’s location (that is the Web server responding to the server name part of the URL) provides the requestor with the new location (absolute URL). A server sided redirect tells the user agent (browser, Web robot, …) that it has to perform another request for the URL given in the HTTP header’s “location” line in order to fetch the requested contents. The type of the redirect (3. Web resource. Because search engine crawlers/indexers try to emulate human traffic with their content requests, it’s important to choose the right redirect type both for humans and robots. That does not mean that a 3. HTTP response code to crawlers and browsers. More on that later. Execution of server sided redirects. Server sided redirects are executed before your server delivers any content.In other words, your server ignores everything it could deliver (be it a static HTML file, a script output, an image or whatever) when it runs into a redirect condition. . Some redirects are done by the server itself (see handling incomplete URIs), and there are several places where you can set (conditional) redirect directives: Apache’s httpd.PHP scripts. (If you suffer from IIS/ASP maladies, this post is for you.) Examples: Browser Request: ww. Autocad Architecture 2009 Crack Keygen Patch . Apache: 3. 01 header: www.Info like content length..)Content: Article #2.The 3. 01 header may or may not be followed by a hyperlink pointing to the new location, solely added for user agents which can’t handle redirects. Besides that link, there’s no content sent to the client after the redirect header. More important, you must not send a single byte to the client before the HTTP header. If you for example code [space(s)|tab|new- line|HTML code]< ? HTTP header different from the server’s default instructions), you’ll produce a runtime error. The redirection fails, leaving the visitor with an ugly page full of cryptic error messages but no link to the new location. That means in each and every page or script which possibly has to deal with the HTTP header, put the logic testing those conditions at the very top. Always send the header status code and optional further information like a new location to the client before you process the contents. After the last redirect header line terminate execution with the “L” parameter in . PHP’s exit; statement, or whatever. An HTTP redirect, regardless its type, consists of two lines in the HTTP header. In this example I’ve requested http: //www. URI because my server name lacks the www- thingy, hence my canonicalization routine outputs this HTTP header: HTTP/1. Moved Permanently. Date: Mon, 0. 1 Oct 2. GMTServer: Apache/1. Unix) PHP/4. 4. 4. Location: http: //sebastians- pamphlets. Connection: close. Transfer- Encoding: chunked. Content- Type: text/html; charset=iso- 8. The redirect response code in a HTTP status line. The first line of the header defines the protocol version, the reponse code, and provides a human readable reason phrase. Here is a shortened and slightly modified excerpt quoted from the HTTP/1. Status- Line. The first line of a Response message is the Status- Line, consisting of the protocol version followed by a numeric status code and its associated textual phrase, with each element separated by SP (space) characters. No CR or LF is allowed except in the final CRLF sequence. Status- Line = HTTP- Version SP Status- Code SP Reason- Phrase CRLF[e. HTTP/1. 1 3. 01 Moved Permanently” + CRLF]Status Code and Reason Phrase. The Status- Code element is a 3- digit integer result code of the attempt to understand and satisfy the request. The Reason- Phrase is intended to give a short textual description of the Status- Code. The Status- Code is intended for use by automata and the Reason- Phrase is intended for the human user. The client is not required to examine or display the Reason- Phrase. The first digit of the Status- Code defines the class of response. The last two digits do not have any categorization role. Redirection - Further action must be taken in order to complete the request[…]The individual values of the numeric status codes defined for HTTP/1. Reason- Phrases, are presented below. The reason phrases listed here are only recommendations — they MAY be replaced by local equivalents without affecting the protocol [that means you could translate and/or rephrase them].[…]3. Multiple Choices. Moved Permanently. Found [Elsewhere]3. See Other. 30. 4: Not Modified. Use Proxy. 30. 7: Temporary Redirect[…]In terms of SEO the understanding of 3. HTTP/1. 1, are still capable to confuse some search engines, even major players like Google when Ms. Googlebot for some reasons thinks she must do HTTP/1. You should not perform 3. HTTP/1. 0 requests, use 3. More info on this issue below in the 3. Please note that the default reponse code of all redirects is 3. That means when you send a HTTP header with a location directive but without an explicit response code, your server will return a 3. Found status line. That’s kinda crappy, because in most cases you want to avoid the 3. Do no nay never rely on default response codes! Ms Office 2003 Oem Install Ubuntu . Always prepare a server sided redirect with a status line telling an actual response code (3.In server sided scripts (PHP, Perl, Cold. Fusion, JSP/Java, ASP/VB- Script…) always send a complete status line, and in . R=3. 01|3. 02|3. 07,L] parameter to statements like Rewrite. Rule: Rewrite. Rule (.*) http: //www. R=3. 01,L]The next element you need in every redirect header is the location directive. Here is the official syntax: Location. The Location response- header field is used to redirect the recipient to a location other than the Request- URI for completion of the request or identification of a new resource. For 3xx responses, the location SHOULD indicate the server’s preferred URI for automatic redirection to the resource. The field value consists of a single absolute URI. Location = “Location” “: ” absolute. URI [+ CRLF]An example is: Location: http: //sebastians- pamphlets. Please note that the value of the location field must be an absolute URL, that is a fully qualified URL with scheme (http|https), server name (domain|subdomain), and path (directory/file name) plus the optional query string (”?” followed by variable/value pairs like ? URLs for historical reasons). A relative URL like ./page. X)HTML (although you better plan a spectacular suicide than any use of relative URIs!), but you must not use relative URLs in HTTP response headers! How to implement a server sided redirect? You can perform HTTP redirects with statements in your Web server’s configuration, and in server sided scripts, e. PHP or Perl. Java. Script is a client sided language and therefore lacks a mechanism to do HTTP redirects. That means all JS redirects count as a 3. Using Is. Dlg=1& Source=URL at the same time.. Hi all,I have been racking my brain for hours over this. I have an issue tracking list on a site that is maintained by a department in full. I also would like users with anonymous access to be able to create items within this list but I do not want them to see quick launch or top navigation - using Is. Dlg=1 would be perfect for this. However I would also like to redirect anonymous users (or anyone, does not really matter) to a page other than the list once the new item has been added - using Source=URL is perfect for this. Turns out that you cannot use both of these parameters at the same time. Does anyone know if there is a quick and easy way to do what I want? Thanks for any help you can provide.
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