HTTP_RESPONSE - STREAM::expression to replace one string with another in HTTP data payload
I am trying to replace any instance of a certain URI whenever it occurs in the HTTP response data. It occurs within JavaScript <script> tags of the HTML document. I have the default system stream profile on the virtual server, and I'm using an iRule. When I inspect the web page after in my browser, I still see the URI that I am trying to replace, even the first instance of it. Although, as I understand it from reading the content at the links below here, I am using STREAM::expression in my iRule, so I think it should replace all occurrences, not just the first. Seems to not be replacing any though. https://support.f5.com/csp/article/K39394712 https://clouddocs.f5.com/api/irules/STREAM__expression.html I have also checked these out: https://devcentral.f5.com/s/articles/ltm-stream-profile-multiple-replacements--regular-expressions https://clouddocs.f5.com/api/irules/STREAM__replace.html Here is what I have. # FQDN app.example.com resolves to ltm virtual server SNAT IP # if URI starts with /fooportal # then reverse proxy to https://example.com/fooportal # if the URI started with anything other than /fooportal # then 307 redirect to host example.com # but with the originally requested path # # when HTTP_REQUEST { # Disable the stream filter for client requests STREAM::disable # only requests to app.example.com will come to this virual server # app.example.com has a DNS Address record to this virtual server's SNAT IP Address # whereas the DNS Address record for example.com is the back-end real server address if { ([string tolower [HTTP::uri]] starts_with "/fooportal") } { HTTP::header replace Host "example.com" pool example.com_HTTPS_Pool } elseif { ([string tolower [HTTP::header host]] eq "app.example.com") } { HTTP::header replace Host "example.com" HTTP::respond 307 Location https://[HTTP::host][HTTP::uri] } } when HTTP_RESPONSE { # Disable the stream filter for server responses STREAM::disable # Enable the stream filter for text responses only if {([HTTP::status] == 200) && ([HTTP::header value Content-Type] starts_with "text")} { # Replace 'example.com' with 'app.example.com' STREAM::expression {@example.com/fooportal/@app.example.com/fooportal/@} # Enable the stream filter STREAM::enable } }