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F5 irule http response redirect

By | 13.05.2020

Version notice:. The links to the sample code below are remnants of the old DevCentral wiki and will result in a error. For best results, please copy the link text and search the codeshare directly on DevCentral. F5 does not monitor or control community code contributions. We make no guarantees or warranties regarding the available code, and it may contain errors, defects, bugs, inaccuracies, or security vulnerabilities.

This command sends the redirect response to the client immediately, so you cannot invoke this command multiple times while processing a single HTTP request or responsenor can you use any other commands that modify response headers or content after you give this command.

If you want to send a different code such as Permanent Redirect you may invoke HTTP::respond with a suitable status code and Location header, for example:.

This command sends a response to the client telling the client to send a fresh request to the URL you specify. Most web browsers will display the new URL to the user. In some situations you may just want to change the URL in a request before it reaches the server. The client need not be notified and will not display the change to the user, plus avoiding an extra network round-trip will improve application performance. HTTP :: header Host newhost. Warning The links to the sample code below are remnants of the old DevCentral wiki and will result in a error.

Command Performance - This iRule will compare switch. Link Tracking - This iRule will store the number of times links on your application are viewed.

f5 irule http response redirect

LinkTracking2 - This iRule will store the number of times links on your application are viewed with optional result filtering. In this case. This avoids using a global counter mechanism to track past selections. TransparentBotProtection - This Solution will act as a Web Form Application protection layer against malicious entities such as automated bots.While best practices for virtualized web applications may indicate that relative self-referencing links and redirects those which don't include the protocol or the hostname are preferable to absolute ones those which domany applications load balanced by our gear still send absolute self-references.

This drives a fairly common requirement when proxying or virtualizing HTTP applications: To manipulate any redirects the servers may set such that they fully support the intended proxy or virtualization scheme. Other applications or environments may require modifications to the host, URI, or other headers. LTM provides a couple of different ways to manage server-set redirects appropriately. The LTM http profile contains the " Rewrite Redirects " option which supports rewriting server-set redirects to the https protocol with a hostname matching the one requested by the client.

The possible settings for the option are "All", "Matching", Node", and "None". While these options cover a broad range of applications, they may not be granular enough to meet your needs. For example, you might only want to re-write the hostname, not the protocol, to support HTTP-only proxying scenarios.

Here's an iRule that rewrites just one specific hostname to another, preserving the protocol scheme and URI as set by the server:.

Here's one that rewrites both relative and absolute redirects to absolute HTTPS redirects, inserting the requested hostname when re-writing the relative redirect to absolute:. The string map example could quite easily be adjusted or extended to meet just about any redirect rewriting need you might encounter. The string map command will accept multiple replacement pairs which can come in handy if multiple hostnames or directory strings need to be re-written -- in many cases you can perform the intended replacements with a single string map command.

As I mentioned earlier, redirects are only one place server self-references may be found. If absolute self-referencing links are embedded in the HTTP payload, you may need to build and apply a stream profile to perform the appropriate replacements.

An iRule could also be used for more complex payload replacements if necessary. Skip to Navigation Skip to Main Content. Login Sign up. Topics plus plus. Application Delivery. What's Devcentral.

iRule: modify uri and response

HTTP profile option: "Rewrite Redirects" The LTM http profile contains the " Rewrite Redirects " option which supports rewriting server-set redirects to the https protocol with a hostname matching the one requested by the client. You should also use "All" if your application is intended to be secure throughout, even if redirected to another hostname. Matching Rewrites redirects when the request and the redirect are identical except for a trailing slash.

See K Taking it a step further As I mentioned earlier, redirects are only one place server self-references may be found.

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BIG-IP Solutions: Simple URL Redirect Using Policies

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Education Training.Version notice:. The links to the sample code below are remnants of the old DevCentral wiki and will result in a error. For best results, please copy the link text and search the codeshare directly on DevCentral. F5 does not monitor or control community code contributions. We make no guarantees or warranties regarding the available code, and it may contain errors, defects, bugs, inaccuracies, or security vulnerabilities.

If the command runs on the client side, it sends the response to the client without any load balancing taking place. If the command runs on the server side, the content from the actual server is discarded and replaced with the information provided. Also, this command will not work if another response has already been sent to the client for example, by invoking HTTP::redirect.

The HTTP status code is determined by the supplied parameter. Note: The noserver flag was added in 9. The noserver flag must be included after the content if any. Note: The -version flag was added in It must immediately follow the status code and precede the content if any and any other flags. Or you can generate an apology page from within the iRule. The curly braces prevent variable expansion and should eliminate the need to escape meta-characters within the response content.

Here is an example which rewrites a redirect with the original cookies from the HTTP response of the server:. Another example with multiple cookies, but without excessive empty cookie - returns original cookies to the client:. Warning The links to the sample code below are remnants of the old DevCentral wiki and will result in a error.

HTTP retry on pre LinkTracking2 - This iRule will store the number of times links on your application are viewed with optional result filtering. In this case. This avoids using a global counter mechanism to track past selections. Redirect On Weak Encryption - This rule illustrates how to redirect a client to an un-encrypted page with an informational error if the client does not have at least bits of encryption.

Version 9.Version notice:. The links to the sample code below are remnants of the old DevCentral wiki and will result in a error. For best results, please copy the link text and search the codeshare directly on DevCentral.

F5 does not monitor or control community code contributions. We make no guarantees or warranties regarding the available code, and it may contain errors, defects, bugs, inaccuracies, or security vulnerabilities.

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AUTH::authenticate - Performs a new authentication operation. CACHE::userkey - Allows users to add user-defined values to the key used by the cache to reference the cached content. HTTP::respond - Generates a response to the client as if it came from the server. LB::server - Returns information about the currently selected server listen - Sets up a related ephemeral listener to allow an incoming related connection to be established.

LSN::address - Set or override translation address. LSN::persistence - Set translation selection mode and persistence timeout.

f5 irule http response redirect

LSN::persistence-entry - Create or lookup translation address. LSN::port - Set or override translation port. Warning The links to the sample code below are remnants of the old DevCentral wiki and will result in a error. CMP v Controlling Bots - Webbots. Cookie Persistence Without The Port - This rule was written in response to a requirement in which a client had connections to multiple virtual services.

SAM launch application with username and passwsord - By design. HTTP retry on pre In this case. Manual cookie persistence - I had an app admin ask me for a way to temporarily force node assignment. This avoids using a global counter mechanism to track past selections. It does not modify the query string. SSL Termination - Finds and replaces a link or specific text with another link or text. Version 9.Version notice:. The links to the sample code below are remnants of the old DevCentral wiki and will result in a error.

For best results, please copy the link text and search the codeshare directly on DevCentral. F5 does not monitor or control community code contributions. We make no guarantees or warranties regarding the available code, and it may contain errors, defects, bugs, inaccuracies, or security vulnerabilities.

Note that the command will operate on the value of the last header if there are multiple headers with the same name. You may omit the value argument if the header name does not collide with any of the HTTP::header subcommands.

Note that the command will return the values all of the headers as a Tcl list if there are multiple headers with the same name. If there is a single value for the HTTP header, that value will be returned. This subcommand was added in v9. The actual header values are unchanged. This issue is tracked as CR and has been fixed in In v9.

If is supplied, returns the number of HTTP headers present in the request or response with that name.

iRule Recipe 1: Single URL Explicit Redirect

This was an issue at least in 9. This has been fixed in 9. The input can be a single header name and value, or a list containing name value pairs [list name1 value1 name2 value2]. This command performs a header insertion if the header was not present.

If there are multiple instances of the header, only the last instance is replaced. This documents the implementation in v9. Note that this command is only for HTTP requests, not responses.

If you are using the command in the server-side context, you may want to consider adding Location to the list of retained headers if your application requires they be sent to clients. If you are using the command in the client-side context, you may want to consider adding CookieAcceptand Accept-Encoding to the list of retained headers. Warning The links to the sample code below are remnants of the old DevCentral wiki and will result in a error. This was information our se… Block Referral Requests - This iRule will scan referral requests for images and insert a canned image for requests not coming from a allowed host.

SAM launch application with username and passwsord - By design. SSL Termination - Finds and replaces a link or specific text with another link or text. Uri version mapping - This rule implements a stripped down set of functionality of the ProxyPass … Version 9.Version notice:.

To send a RST without headers in response to a specific server response condition, execute. The links to the sample code below are remnants of the old DevCentral wiki and will result in a error. For best results, please copy the link text and search the codeshare directly on DevCentral. F5 does not monitor or control community code contributions. We make no guarantees or warranties regarding the available code, and it may contain errors, defects, bugs, inaccuracies, or security vulnerabilities.

HTTP :: collect. HTTP::respond - Generates a response to the client as if it came from the server. HTTP::retry - Resends a request to a server. HTTP::status - Returns the response status code. LB::server - Returns information about the currently selected server listen - Sets up a related ephemeral listener to allow an incoming related connection to be established. Warning The links to the sample code below are remnants of the old DevCentral wiki and will result in a error.

Content type tracking - Have you ever wondered what types of content are served by your web servers… Convert s to Blank s - An iRule to convert an HTTP response to a blank response.

HTTP retry on pre Manual cookie persistence - I had an app admin ask me for a way to temporarily force node assignment. SSL Termination - Finds and replaces a link or specific text with another link or text.This one is a follow up to my last example: iRule: modifying the uri without a redirect except that the response content now needs to be modified as well to map to the client's known uri.

This can be done with some fun regexp 's returning indices for the matches. Extra string length 's are costly when run 's of times. Hard coding the "diff" value could save some cycles. Hello, I have been used the irule in Skip to Navigation Skip to Main Content.

Login Sign up. Topics plus plus. Application Delivery. What's Devcentral. The catch is we cannot redirect the browser client to the peanut. To make it even more complicated, sometimes the app will send back a payload with a URL inside it for the user that we need to change from peanut.

Sort by:. Search this feed Skip Feed View This Post. May 23, at PM. More comments 1 of 3.

f5 irule http response redirect

Login to comment on this post. About DevCentral An F5 Networks Community We are an online community of technical peers dedicated to learning, exchanging ideas, and solving problems - together. Get a developer Lab license. Contact us - Feedback and Help. Become an MVP.


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