https://github.com/foresthoffman/rwb

A Go package for intercepting HTTP(s) response values before sending them to the request client.
https://github.com/foresthoffman/rwb

go golang http

Last synced: about 1 month ago
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A Go package for intercepting HTTP(s) response values before sending them to the request client.

• Host: GitHub
• URL: https://github.com/foresthoffman/rwb
• Owner: foresthoffman
• License: mit
• Created: 2021-04-16T00:10:44.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-04-16T00:36:58.000Z (over 3 years ago)
• Last Synced: 2024-06-20T14:29:12.814Z (7 months ago)
• Topics: go, golang, http
• Language: Go
• Homepage:
• Size: 4.88 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
## RWB - Response Writer Buffer

The rwb package exposes a wrapper for the `http.ResponseWriter`, which allows for intercepting HTTP(s) response bodies and response headers. The `ResponseWriterBuffer` is lightweight and can assist in HTTP(s) server request handling, as well as server response middleware.

Here's a guide to thinking in terms of *response* middleware and not just *request* middleware:

[Intercepting RESTful Responses with Middleware](https://dev.to/foresthoffman/intercepting-restful-responses-with-middleware-4b64)

### Installation

Run `go get -u github.com/foresthoffman/rwb`

### Importing

Import this package by including `github.com/foresthoffman/rwb` in your import block.

e.g.

```go

package main

import(

    ...

    "github.com/foresthoffman/rwb"

)

```

### Usage

Basic usage:

```go

package main

import (

	"github.com/foresthoffman/rwb"

	"log"

	"net/http"

)

func main() {

	// Hit http://localhost:9001/ in your browser, or cURL/wget it! It's up to you.

	http.ListenAndServe(":9001", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

		// You could update the header directly.

		w.Header().Set("Content-Type", "application/json")

		// New header exists.

		log.Println(w.Header().Get("Content-Type"))

		// Or you could write to the buffer, and flush it when you're done.

		writerBuf := rwb.New(w)

		writerBuf.Header().Set("potato", "russet")

		// New header doesn't exist yet. It's in the buffer!

		log.Println(w.Header().Get("potato"))

		_, err := writerBuf.Flush()

		if err != nil {

			panic(err)

		}

		// New header exists!

		log.Println(w.Header().Get("potato"))

	}))

}

```

_That's all, enjoy!_