Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

core

package

Go to main page

Versions in this module

v1

v1.5.2

May 20, 2026

v1.5.1

May 18, 2026

v1.5.0

May 16, 2026

v1.4.3

May 15, 2026

v1.4.2

May 6, 2026

v1.4.1

Mar 17, 2026

v1.4.0

Mar 16, 2026

v1.3.1

Mar 3, 2026

v1.3.0

Feb 28, 2026

v1.2.1

Jan 5, 2026

v1.2.0

Oct 29, 2025

v1.1.0

Apr 3, 2025

v1.1.0-beta-2

Apr 3, 2025

v1.1.0-beta-1

Mar 12, 2025

v1.0.0

Nov 4, 2024

Changes in this version

+ func EncodeURL(urlFormat string, args ...interface{}) string

+ func ExtractExtraProperties(bytes []byte, value interface{}, exclude ...string) (map[string]interface{}, error)

+ func MarshalJSONWithExtraProperties(marshaler interface{}, extraProperties map[string]interface{}) ([]byte, error)

+ func MarshalJSONWithExtraProperty(marshaler interface{}, key string, value interface{}) ([]byte, error)

+ func MergeHeaders(left, right http.Header) http.Header

+ func QueryValues(v interface{}) (url.Values, error)

+ func StringifyJSON(value interface{}) (string, error)

+ func WriteMultipartJSON(writer *multipart.Writer, field string, value interface{}) error

+ type APIError struct

+ StatusCode int

+ func NewAPIError(statusCode int, err error) *APIError

+ func (a *APIError) Error() string

+ func (a *APIError) Unwrap() error

+ type ApiKeyOption struct

+ ApiKey string

+ type BaseURLOption struct

+ BaseURL string

+ type BodyPropertiesOption struct

+ BodyProperties map[string]interface{}

+ type CallParams struct

+ BodyProperties map[string]interface{}

+ Client HTTPClient

+ ErrorDecoder ErrorDecoder

+ Headers http.Header

+ MaxAttempts uint

+ Method string

+ QueryParameters url.Values

+ Request interface{}

+ Response interface{}

+ ResponseIsOptional bool

+ URL string

+ type Caller struct

+ func NewCaller(params *CallerParams) *Caller

+ func (c *Caller) Call(ctx context.Context, params *CallParams) error

+ type CallerParams struct

+ Client HTTPClient

+ MaxAttempts uint

+ type Date struct

+ func NewDate(t time.Time) *Date

+ func NewOptionalDate(t *time.Time) *Date

+ func (d *Date) MarshalJSON() ([]byte, error)

+ func (d *Date) Time() time.Time

+ func (d *Date) TimePtr() *time.Time

+ func (d *Date) UnmarshalJSON(data []byte) error

+ type DateTime struct

+ func NewDateTime(t time.Time) *DateTime

+ func NewOptionalDateTime(t *time.Time) *DateTime

+ func (d *DateTime) MarshalJSON() ([]byte, error)

+ func (d *DateTime) Time() time.Time

+ func (d *DateTime) TimePtr() *time.Time

+ func (d *DateTime) UnmarshalJSON(data []byte) error

+ type ErrorDecoder func(statusCode int, body io.Reader) error

+ type HTTPClient interface

+ Do func(*http.Request) (*http.Response, error)

+ type HTTPClientOption struct

+ HTTPClient HTTPClient

+ type HTTPHeaderOption struct

+ HTTPHeader http.Header

+ type MaxAttemptsOption struct

+ MaxAttempts uint

+ type Optional struct

+ Null bool

+ Value T

+ func (o *Optional[T]) MarshalJSON() ([]byte, error)

+ func (o *Optional[T]) String() string

+ func (o *Optional[T]) UnmarshalJSON(data []byte) error

+ type QueryEncoder interface

+ EncodeQueryValues func(key string, v *url.Values) error

+ type QueryParametersOption struct

+ QueryParameters url.Values

+ type RequestOption interface

+ type RequestOptions struct

+ ApiKey string

+ BaseURL string

+ BodyProperties map[string]interface{}

+ HTTPClient HTTPClient

+ HTTPHeader http.Header

+ MaxAttempts uint

+ QueryParameters url.Values

+ func NewRequestOptions(opts ...RequestOption) *RequestOptions

+ func (r *RequestOptions) ToHeader() http.Header

+ type Retrier struct

+ func NewRetrier(opts ...RetryOption) *Retrier

+ func (r *Retrier) Run(fn RetryFunc, request *http.Request, errorDecoder ErrorDecoder, ...) (*http.Response, error)

+ type RetryFunc func(*http.Request) (*http.Response, error)

+ type RetryOption func(*retryOptions)

+ func WithMaxAttempts(attempts uint) RetryOption

v1.0.0-beta-3

Oct 29, 2024

v1.0.0-beta-2

Oct 15, 2024

v1.0.0-beta

Sep 27, 2024