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Published: Jan 27, 2019 License: MIT Imports: 2 Imported by: 0



Package pattern contains utilities for Goji Pattern authors.

Goji users should not import this package. Instead, use the utilities provided by your Pattern package. If you are looking for an implementation of Pattern, try Goji's pat subpackage, which contains a simple domain specific language for specifying routes.

For Pattern authors, use of this subpackage is entirely optional. Nevertheless, authors who wish to take advantage of Goji's PathPrefix optimization or who wish to standardize on a few common interfaces may find this package useful.



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var AllVariables = allVariables{}

AllVariables is a standard value which, when passed to context.Context.Value, returns all variable bindings present in the context, with bindings in newer contexts overriding values deeper in the stack. The concrete type


is used for this purpose. If no variables are bound, nil should be returned instead of an empty map.


func Path

func Path(ctx context.Context) string

Path returns the path that the Goji router uses to perform the PathPrefix optimization. While this function does not distinguish between the absence of a path and an empty path, Goji will automatically extract a path from the request if none is present.

By convention, paths are stored in their escaped form (i.e., the value returned by net/url.URL.EscapedPath, and not URL.Path) to ensure that Patterns have as much discretion as possible (e.g., to behave differently for '/' and '%2f').

func SetPath

func SetPath(ctx context.Context, path string) context.Context

SetPath returns a new context in which the given path is used by the Goji Router when performing the PathPrefix optimization. See Path for more information about the intended semantics of this path.


type Variable

type Variable string

Variable is a standard type for the names of Pattern-bound variables, e.g. variables extracted from the URL. Pass the name of a variable, cast to this type, to context.Context.Value to retrieve the value bound to that name.

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