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Simple HTTP, REST, and SSE client library for Go

require resty.dev/v3 v3.0.0-beta.6

Minimum required Go version is go1.23

// HTTP, REST Client
client := resty.New()
defer client.Close()

res, err := client.R().
    EnableTrace().
    Get("https://httpbin.org/get")
fmt.Println(err, res)
fmt.Println(res.Request.TraceInfo())

// Server-Sent Events Client
es := NewEventSource().
    SetURL("https://sse.dev/test").
    OnMessage(func(e any) {
        fmt.Println(e.(*resty.Event))
    }, nil)

err := es.Get()
fmt.Println(err)

Resty v3 offers improved performance, memory efficiency, and features compared to Resty v2.

This website represents Resty v3 and above. For previous v2 documentation, refer to this README.md

Key Features#

- Simple and chainable methods
- Multipart and Form data with ease
- Request Path Params
- Retry Mechanism
- Circuit Breaker
- Goroutine & concurrent safe
- Automatic decompresser (gzip, deflate)
- Basic auth, Digest auth, Bearer, etc.
- Request tracing
- CURL command generation
- HTTP/1.1 and HTTP/2. Integrate HTTP/3
- Circuit Breaker Policy
and much more ...
- Automatic marshal and unmarshal
- Large file upload and progress callback
- Download to file
- Redirect Policies
- Debug mode with human-readable, JSON log
- Load Balancer and Service Discovery
- Response body limit & Unlimited reads
- Bazel support
- Dynamic reload of TLS certificates
- Custom root and client certificates
and much more ...

Highly Extensible#

Resty provides various ways to enhance its functionality by implementing its interfaces to meet all custom requirements.

Request middleware
Response middleware
Content-Type encoder & decoder
Content Decompresser
Load Balancer and Service Discovery
Retry Strategy, Condition, and Hooks
Circuit Breaker Policy
Request Functions
Redirect Policy
Transport RoundTripper
Debug Log Formatter
Logger