Invalid value for field ‘resource’: ”. Invalid path pattern when adding path rules

google-cloud-platformgoogle-compute-engine

I want to add path matching rules to a url map in google compute engine. Here is my command:

gcloud compute url-maps add-path-matcher myproject-url-map --default-service \
backend-service-wordpress  --path-matcher-name root --path-rules "/=backend-\
service-wordpress,/features/=backend-service-wordpress,/pricing/=backend-\
service-wordpress,/blog/=backend-service-wordpress,/\?*=backend-service-wordpress"

it throws this error message: 

ERROR: (gcloud.compute.url-maps.add-path-matcher) There was a problem modifying the resource:
 - Invalid value for field 'resource': ''. Invalid path pattern

I don't think I have defined a blank resource in this command line.

I have to quote the parameters to --path-rules in a pair of quotes because zsh will complaint otherwise.

This is the first rule I want to define. Following this I am going to add a rule to map all /* to another backend service, like so:

gcloud compute url-maps add-path-matcher myproject-url-map --default-service \
    backend-service-app --path-matcher-name others --path-rules "/*=backend-service-app"

What does this error message? What's wrong with my command?

Best Answer

I suspect it is something to do with using both double quotes and backslash quotes for the argument to --path-rules. In particular, you don't need the backslash to quote the question mark. Note the output from:

print -r -- "\?"

Similarly, the newlines inside the double quotes don't need a backslash unless you have the csh_junkie_quotes option set.

There's various ways zsh can help you to quote words automatically. One way is to perhaps try binding a key to quote-region. This will quote the region (emacs mode) or visual selection (vi mode).

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