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113 lines
5.1 KiB
Markdown
113 lines
5.1 KiB
Markdown
go-restful
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==========
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package for building REST-style Web Services using Google Go
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[](https://travis-ci.org/emicklei/go-restful)
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[](https://goreportcard.com/report/github.com/emicklei/go-restful)
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[](https://pkg.go.dev/github.com/emicklei/go-restful)
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[](https://codecov.io/gh/emicklei/go-restful)
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- [Code examples use v3](https://github.com/emicklei/go-restful/tree/v3/examples)
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REST asks developers to use HTTP methods explicitly and in a way that's consistent with the protocol definition. This basic REST design principle establishes a one-to-one mapping between create, read, update, and delete (CRUD) operations and HTTP methods. According to this mapping:
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- GET = Retrieve a representation of a resource
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- POST = Create if you are sending content to the server to create a subordinate of the specified resource collection, using some server-side algorithm.
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- PUT = Create if you are sending the full content of the specified resource (URI).
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- PUT = Update if you are updating the full content of the specified resource.
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- DELETE = Delete if you are requesting the server to delete the resource
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- PATCH = Update partial content of a resource
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- OPTIONS = Get information about the communication options for the request URI
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### Usage
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#### Without Go Modules
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All versions up to `v2.*.*` (on the master) are not supporting Go modules.
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```
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import (
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restful "github.com/emicklei/go-restful"
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)
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```
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#### Using Go Modules
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As of version `v3.0.0` (on the v3 branch), this package supports Go modules.
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```
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import (
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restful "github.com/emicklei/go-restful/v3"
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)
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```
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### Example
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```Go
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ws := new(restful.WebService)
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ws.
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Path("/users").
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Consumes(restful.MIME_XML, restful.MIME_JSON).
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Produces(restful.MIME_JSON, restful.MIME_XML)
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ws.Route(ws.GET("/{user-id}").To(u.findUser).
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Doc("get a user").
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Param(ws.PathParameter("user-id", "identifier of the user").DataType("string")).
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Writes(User{}))
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...
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func (u UserResource) findUser(request *restful.Request, response *restful.Response) {
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id := request.PathParameter("user-id")
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...
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}
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```
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[Full API of a UserResource](https://github.com/emicklei/go-restful/blob/v3/examples/user-resource/restful-user-resource.go)
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### Features
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- Routes for request → function mapping with path parameter (e.g. {id} but also prefix_{var} and {var}_suffix) support
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- Configurable router:
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- (default) Fast routing algorithm that allows static elements, [google custom method](https://cloud.google.com/apis/design/custom_methods), regular expressions and dynamic parameters in the URL path (e.g. /resource/name:customVerb, /meetings/{id} or /static/{subpath:*})
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- Routing algorithm after [JSR311](http://jsr311.java.net/nonav/releases/1.1/spec/spec.html) that is implemented using (but does **not** accept) regular expressions
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- Request API for reading structs from JSON/XML and accessing parameters (path,query,header)
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- Response API for writing structs to JSON/XML and setting headers
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- Customizable encoding using EntityReaderWriter registration
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- Filters for intercepting the request → response flow on Service or Route level
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- Request-scoped variables using attributes
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- Containers for WebServices on different HTTP endpoints
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- Content encoding (gzip,deflate) of request and response payloads
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- Automatic responses on OPTIONS (using a filter)
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- Automatic CORS request handling (using a filter)
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- API declaration for Swagger UI ([go-restful-openapi](https://github.com/emicklei/go-restful-openapi))
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- Panic recovery to produce HTTP 500, customizable using RecoverHandler(...)
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- Route errors produce HTTP 404/405/406/415 errors, customizable using ServiceErrorHandler(...)
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- Configurable (trace) logging
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- Customizable gzip/deflate readers and writers using CompressorProvider registration
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- Inject your own http.Handler using the `HttpMiddlewareHandlerToFilter` function
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## How to customize
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There are several hooks to customize the behavior of the go-restful package.
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- Router algorithm
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- Panic recovery
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- JSON decoder
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- Trace logging
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- Compression
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- Encoders for other serializers
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- Use [jsoniter](https://github.com/json-iterator/go) by building this package using a build tag, e.g. `go build -tags=jsoniter .`
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- Use the package variable `TrimRightSlashEnabled` (default true) to control the behavior of matching routes that end with a slash `/`
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## Resources
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- [Example programs](./examples)
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- [Example posted on blog](http://ernestmicklei.com/2012/11/go-restful-first-working-example/)
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- [Design explained on blog](http://ernestmicklei.com/2012/11/go-restful-api-design/)
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- [sourcegraph](https://sourcegraph.com/github.com/emicklei/go-restful)
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- [showcase: Zazkia - tcp proxy for testing resiliency](https://github.com/emicklei/zazkia)
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- [showcase: Mora - MongoDB REST Api server](https://github.com/emicklei/mora)
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Type ```git shortlog -s``` for a full list of contributors.
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© 2012 - 2023, http://ernestmicklei.com. MIT License. Contributions are welcome.
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