graphql

package
v0.0.2 Latest Latest
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 Go to latest Published: Aug 29, 2022 License: MIT Imports: 16 Imported by: 0

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Index

Constants

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const Version = "v0.17.16-dev"

Variables

View Source 
var (
	Null  = &lit{nullLit}
	True  = &lit{trueLit}
	False = &lit{falseLit}
)
View Source 
var Now = time.Now

Now is time.Now, except in tests. Then it can be whatever you want it to be.

Functions

func AddError 

func AddError(ctx context.Context, err error)

AddError sends an error to the client, first passing it through the error presenter.

func AddErrorf 

func AddErrorf(ctx context.Context, format string, args ...interface{})

AddErrorf writes a formatted error to the client, first passing it through the error presenter.

func BuildUnmarshalerMap 

func BuildUnmarshalerMap(unmarshaler ...interface{}) map[reflect.Type]reflect.Value

BuildUnmarshalerMap returns a map of unmarshal functions of the ExecutableContext to use with the WithUnmarshalerMap function.

func CoerceList 

func CoerceList(v interface{}) []interface{}

CoerceList applies coercion from a single value to a list.

func CollectAllFields 

func CollectAllFields(ctx context.Context) []string

CollectAllFields returns a slice of all GraphQL field names that were selected for the current resolver context. The slice will contain the unique set of all field names requested regardless of fragment type conditions.

func DefaultErrorPresenter 

func DefaultErrorPresenter(ctx context.Context, err error) *gqlerror.Error

func DefaultRecover 

func DefaultRecover(ctx context.Context, err interface{}) error

func ErrorOnPath 

func ErrorOnPath(ctx context.Context, err error) error

func GetErrors 

func GetErrors(ctx context.Context) gqlerror.List

func GetExtension 

func GetExtension(ctx context.Context, name string) interface{}

func GetExtensions 

func GetExtensions(ctx context.Context) map[string]interface{}

GetExtensions returns any extensions registered in the current result context

func GetFieldErrors 

func GetFieldErrors(ctx context.Context, rctx *FieldContext) gqlerror.List

GetFieldErrors returns a list of errors that occurred in the given field

func GetPath 

func GetPath(ctx context.Context) ast.Path

func GetStartTime 

func GetStartTime(ctx context.Context) time.Time

GetStartTime should only be called by the handler package, it will be set into request context as Stats.Start

func HasFieldError 

func HasFieldError(ctx context.Context, rctx *FieldContext) bool

HasFieldError returns true if the given field has already errored

func HasOperationContext 

func HasOperationContext(ctx context.Context) bool

HasOperationContext checks if the given context is part of an ongoing operation

Some errors can happen outside of an operation, eg json unmarshal errors.

func Recover 

func Recover(ctx context.Context, err interface{}) (userMessage error)

func RegisterExtension 

func RegisterExtension(ctx context.Context, key string, value interface{})

RegisterExtension allows you to add a new extension into the graphql response

func StartOperationTrace 

func StartOperationTrace(ctx context.Context) context.Context

StartOperationTrace captures the current time and stores it in context. This will eventually be added to request context but we want to grab it as soon as possible. For transports that can only handle a single graphql query per http requests you dont need to call this at all, the server will do it for you. For transports that handle multiple (eg batching, subscriptions) this should be called before decoding each request.

func UnmarshalAny 

func UnmarshalAny(v interface{}) (interface{}, error)

func UnmarshalBoolean 

func UnmarshalBoolean(v interface{}) (bool, error)

func UnmarshalFloat 

func UnmarshalFloat(v interface{}) (float64, error)

func UnmarshalFloatContext 

func UnmarshalFloatContext(ctx context.Context, v interface{}) (float64, error)

func UnmarshalID 

func UnmarshalID(v interface{}) (string, error)

func UnmarshalInputFromContext 

func UnmarshalInputFromContext(ctx context.Context, raw, v interface{}) error

UnmarshalInputFromContext allows unmarshaling input object from a context.

func UnmarshalInt 

func UnmarshalInt(v interface{}) (int, error)

func UnmarshalInt32 

func UnmarshalInt32(v interface{}) (int32, error)

func UnmarshalInt64 

func UnmarshalInt64(v interface{}) (int64, error)

func UnmarshalIntID 

func UnmarshalIntID(v interface{}) (int, error)

func UnmarshalMap 

func UnmarshalMap(v interface{}) (map[string]interface{}, error)

func UnmarshalString 

func UnmarshalString(v interface{}) (string, error)

func UnmarshalTime 

func UnmarshalTime(v interface{}) (time.Time, error)

func UnmarshalUint 

func UnmarshalUint(v interface{}) (uint, error)

func UnmarshalUint32 

func UnmarshalUint32(v interface{}) (uint32, error)

func UnmarshalUint64 

func UnmarshalUint64(v interface{}) (uint64, error)

func WithFieldContext 

func WithFieldContext(ctx context.Context, rc *FieldContext) context.Context

func WithOperationContext 

func WithOperationContext(ctx context.Context, rc *OperationContext) context.Context

func WithPathContext 

func WithPathContext(ctx context.Context, fic *PathContext) context.Context

func WithResponseContext 

func WithResponseContext(ctx context.Context, presenterFunc ErrorPresenterFunc, recoverFunc RecoverFunc) context.Context

func WithRootFieldContext 

func WithRootFieldContext(ctx context.Context, rc *RootFieldContext) context.Context

func WithUnmarshalerMap 

func WithUnmarshalerMap(ctx context.Context, maps map[reflect.Type]reflect.Value) context.Context

WithUnmarshalerMap returns a new context with a map from input types to their unmarshaler functions.

Types

type Array 

type Array []Marshaler

func (Array) MarshalGQL 

func (a Array) MarshalGQL(writer io.Writer)

type Cache 

type Cache interface {
	// Get looks up a key's value from the cache.
	Get(ctx context.Context, key string) (value interface{}, ok bool)

	// Add adds a value to the cache.
	Add(ctx context.Context, key string, value interface{})
}

Cache is a shared store for APQ and query AST caching

type CollectedField 

type CollectedField struct {
	*ast.Field

	Selections ast.SelectionSet
}

func CollectFields 

func CollectFields(reqCtx *OperationContext, selSet ast.SelectionSet, satisfies []string) []CollectedField

CollectFields returns the set of fields from an ast.SelectionSet where all collected fields satisfy at least one of the GraphQL types passed through satisfies. Providing an empty or nil slice for satisfies will return collect all fields regardless of fragment type conditions.

func CollectFieldsCtx 

func CollectFieldsCtx(ctx context.Context, satisfies []string) []CollectedField

This is just a convenient wrapper method for CollectFields

type ContextMarshaler 

type ContextMarshaler interface {
	MarshalGQLContext(ctx context.Context, w io.Writer) error
}

func MarshalFloatContext 

func MarshalFloatContext(f float64) ContextMarshaler

type ContextUnmarshaler 

type ContextUnmarshaler interface {
	UnmarshalGQLContext(ctx context.Context, v interface{}) error
}

type ContextWriterFunc 

type ContextWriterFunc func(ctx context.Context, writer io.Writer) error

func (ContextWriterFunc) MarshalGQLContext 

func (f ContextWriterFunc) MarshalGQLContext(ctx context.Context, w io.Writer) error

type ErrorPresenterFunc 

type ErrorPresenterFunc func(ctx context.Context, err error) *gqlerror.Error

type ExecutableSchema 

type ExecutableSchema interface {
	Schema() *ast.Schema

	Complexity(typeName, fieldName string, childComplexity int, args map[string]interface{}) (int, bool)
	Exec(ctx context.Context) ResponseHandler
}

type ExecutableSchemaMock 

type ExecutableSchemaMock struct {
	// ComplexityFunc mocks the Complexity method.
	ComplexityFunc func(typeName string, fieldName string, childComplexity int, args map[string]interface{}) (int, bool)

	// ExecFunc mocks the Exec method.
	ExecFunc func(ctx context.Context) ResponseHandler

	// SchemaFunc mocks the Schema method.
	SchemaFunc func() *ast.Schema
	// contains filtered or unexported fields
}

ExecutableSchemaMock is a mock implementation of ExecutableSchema. 

func TestSomethingThatUsesExecutableSchema(t *testing.T) {

	// make and configure a mocked ExecutableSchema
	mockedExecutableSchema := &ExecutableSchemaMock{
		ComplexityFunc: func(typeName string, fieldName string, childComplexity int, args map[string]interface{}) (int, bool) {
			panic("mock out the Complexity method")
		},
		ExecFunc: func(ctx context.Context) ResponseHandler {
			panic("mock out the Exec method")
		},
		SchemaFunc: func() *ast.Schema {
			panic("mock out the Schema method")
		},
	}

	// use mockedExecutableSchema in code that requires ExecutableSchema
	// and then make assertions.

}

func (*ExecutableSchemaMock) Complexity 

func (mock *ExecutableSchemaMock) Complexity(typeName string, fieldName string, childComplexity int, args map[string]interface{}) (int, bool)

Complexity calls ComplexityFunc.

func (*ExecutableSchemaMock) ComplexityCalls 

func (mock *ExecutableSchemaMock) ComplexityCalls() []struct {
	TypeName        string
	FieldName       string
	ChildComplexity int
	Args            map[string]interface{}
}

ComplexityCalls gets all the calls that were made to Complexity. Check the length with: 

len(mockedExecutableSchema.ComplexityCalls())

func (*ExecutableSchemaMock) Exec 

func (mock *ExecutableSchemaMock) Exec(ctx context.Context) ResponseHandler

Exec calls ExecFunc.

func (*ExecutableSchemaMock) ExecCalls 

func (mock *ExecutableSchemaMock) ExecCalls() []struct {
	Ctx context.Context
}

ExecCalls gets all the calls that were made to Exec. Check the length with: 

len(mockedExecutableSchema.ExecCalls())

func (*ExecutableSchemaMock) Schema 

func (mock *ExecutableSchemaMock) Schema() *ast.Schema

Schema calls SchemaFunc.

func (*ExecutableSchemaMock) SchemaCalls 

func (mock *ExecutableSchemaMock) SchemaCalls() []struct {
}

SchemaCalls gets all the calls that were made to Schema. Check the length with: 

len(mockedExecutableSchema.SchemaCalls())

type FieldContext 

type FieldContext struct {
	Parent *FieldContext
	// The name of the type this field belongs to
	Object string
	// These are the args after processing, they can be mutated in middleware to change what the resolver will get.
	Args map[string]interface{}
	// The raw field
	Field CollectedField
	// The index of array in path.
	Index *int
	// The result object of resolver
	Result interface{}
	// IsMethod indicates if the resolver is a method
	IsMethod bool
	// IsResolver indicates if the field has a user-specified resolver
	IsResolver bool
	// Child allows getting a child FieldContext by its field collection description.
	// Note that, the returned child FieldContext represents the context as it was
	// before the execution of the field resolver. For example:
	//
	//	srv.AroundFields(func(ctx context.Context, next graphql.Resolver) (interface{}, error) {
	//		fc := graphql.GetFieldContext(ctx)
	//		op := graphql.GetOperationContext(ctx)
	//		collected := graphql.CollectFields(opCtx, fc.Field.Selections, []string{"User"})
	//
	//		child, err := fc.Child(ctx, collected[0])
	//		if err != nil {
	//			return nil, err
	//		}
	//		fmt.Println("child context %q with args: %v", child.Field.Name, child.Args)
	//
	//		return next(ctx)
	//	})
	//
	Child func(context.Context, CollectedField) (*FieldContext, error)
}

func GetFieldContext 

func GetFieldContext(ctx context.Context) *FieldContext

func (*FieldContext) Path 

func (r *FieldContext) Path() ast.Path

type FieldInterceptor 

type FieldInterceptor interface {
	InterceptField(ctx context.Context, next Resolver) (res interface{}, err error)
}

FieldInterceptor called around each field

type FieldMiddleware 

type FieldMiddleware func(ctx context.Context, next Resolver) (res interface{}, err error)

type FieldSet 

type FieldSet struct {
	Values []Marshaler
	// contains filtered or unexported fields
}

func NewFieldSet 

func NewFieldSet(fields []CollectedField) *FieldSet

func (*FieldSet) Concurrently 

func (m *FieldSet) Concurrently(i int, f func() Marshaler)

func (*FieldSet) Dispatch 

func (m *FieldSet) Dispatch()

func (*FieldSet) MarshalGQL 

func (m *FieldSet) MarshalGQL(writer io.Writer)

type FieldStats 

type FieldStats struct {
	// When field execution started
	Started time.Time

	// When argument marshaling finished
	ArgumentsCompleted time.Time

	// When the field completed running all middleware. Not available inside field middleware!
	Completed time.Time
}

type GraphExecutor 

type GraphExecutor interface {
	CreateOperationContext(ctx context.Context, params *RawParams) (*OperationContext, gqlerror.List)
	DispatchOperation(ctx context.Context, rc *OperationContext) (ResponseHandler, context.Context)
	DispatchError(ctx context.Context, list gqlerror.List) *Response
}

type HandlerExtension 

type HandlerExtension interface {
	// ExtensionName should be a CamelCase string version of the extension which may be shown in stats and logging.
	ExtensionName() string
	// Validate is called when adding an extension to the server, it allows validation against the servers schema.
	Validate(schema ExecutableSchema) error
}

HandlerExtension adds functionality to the http handler. See the list of possible hook points below Its important to understand the lifecycle of a graphql request and the terminology we use in gqlgen before working with these

+--- REQUEST POST /graphql --------------------------------------------+ | +- OPERATION query OpName { viewer { name } } -----------------------+ | | | RESPONSE { "data": { "viewer": { "name": "bob" } } } | | | +- OPERATION subscription OpName2 { chat { message } } --------------+ | | | RESPONSE { "data": { "chat": { "message": "hello" } } } | | | | RESPONSE { "data": { "chat": { "message": "byee" } } } | | | +--------------------------------------------------------------------+ | +------------------------------------------------------------------------+

type MapCache 

type MapCache map[string]interface{}

MapCache is the simplest implementation of a cache, because it can not evict it should only be used in tests

func (MapCache) Add 

func (m MapCache) Add(ctx context.Context, key string, value interface{})

Add adds a value to the cache.

func (MapCache) Get 

func (m MapCache) Get(ctx context.Context, key string) (value interface{}, ok bool)

Get looks up a key's value from the cache.

type Marshaler 

type Marshaler interface {
	MarshalGQL(w io.Writer)
}

func MarshalAny 

func MarshalAny(v interface{}) Marshaler

func MarshalBoolean 

func MarshalBoolean(b bool) Marshaler

func MarshalFloat 

func MarshalFloat(f float64) Marshaler

func MarshalID 

func MarshalID(s string) Marshaler

func MarshalInt 

func MarshalInt(i int) Marshaler

func MarshalInt32 

func MarshalInt32(i int32) Marshaler

func MarshalInt64 

func MarshalInt64(i int64) Marshaler

func MarshalIntID 

func MarshalIntID(i int) Marshaler

func MarshalMap 

func MarshalMap(val map[string]interface{}) Marshaler

func MarshalString 

func MarshalString(s string) Marshaler

func MarshalTime 

func MarshalTime(t time.Time) Marshaler

func MarshalUint 

func MarshalUint(i uint) Marshaler

func MarshalUint32 

func MarshalUint32(i uint32) Marshaler

func MarshalUint64 

func MarshalUint64(i uint64) Marshaler

func MarshalUpload 

func MarshalUpload(f Upload) Marshaler

func WrapContextMarshaler 

func WrapContextMarshaler(ctx context.Context, m ContextMarshaler) Marshaler

type Mutation 

type Mutation struct{}

type NoCache 

type NoCache struct{}

func (NoCache) Add 

func (n NoCache) Add(ctx context.Context, key string, value interface{})

func (NoCache) Get 

func (n NoCache) Get(ctx context.Context, key string) (value interface{}, ok bool)

type OperationContext 

type OperationContext struct {
	RawQuery      string
	Variables     map[string]interface{}
	OperationName string
	Doc           *ast.QueryDocument

	Operation              *ast.OperationDefinition
	DisableIntrospection   bool
	RecoverFunc            RecoverFunc
	ResolverMiddleware     FieldMiddleware
	RootResolverMiddleware RootFieldMiddleware

	Stats Stats
}

func GetOperationContext 

func GetOperationContext(ctx context.Context) *OperationContext

func (*OperationContext) Error 

func (c *OperationContext) Error(ctx context.Context, err error)

Error sends an error to the client, passing it through the formatter. Deprecated: use graphql.AddError(ctx, err) instead

func (*OperationContext) Errorf 

func (c *OperationContext) Errorf(ctx context.Context, format string, args ...interface{})

Errorf sends an error string to the client, passing it through the formatter. Deprecated: use graphql.AddErrorf(ctx, err) instead

func (*OperationContext) Recover 

func (c *OperationContext) Recover(ctx context.Context, err interface{}) error

func (*OperationContext) Validate 

func (c *OperationContext) Validate(ctx context.Context) error

type OperationContextMutator 

type OperationContextMutator interface {
	MutateOperationContext(ctx context.Context, rc *OperationContext) *gqlerror.Error
}

OperationContextMutator is called after creating the request context, but before executing the root resolver.

type OperationHandler 

type OperationHandler func(ctx context.Context) ResponseHandler

type OperationInterceptor 

type OperationInterceptor interface {
	InterceptOperation(ctx context.Context, next OperationHandler) ResponseHandler
}

OperationInterceptor is called for each incoming query, for basic requests the writer will be invoked once, for subscriptions it will be invoked multiple times.

type OperationMiddleware 

type OperationMiddleware func(ctx context.Context, next OperationHandler) ResponseHandler

type OperationParameterMutator 

type OperationParameterMutator interface {
	MutateOperationParameters(ctx context.Context, request *RawParams) *gqlerror.Error
}

OperationParameterMutator is called before creating a request context. allows manipulating the raw query on the way in.

type PathContext 

type PathContext struct {
	ParentField *FieldContext
	Parent      *PathContext
	Field       *string
	Index       *int
}

func GetPathContext 

func GetPathContext(ctx context.Context) *PathContext

func NewPathWithField 

func NewPathWithField(field string) *PathContext

func NewPathWithIndex 

func NewPathWithIndex(index int) *PathContext

func (*PathContext) Path 

func (fic *PathContext) Path() ast.Path

type Query 

type Query struct{}

type RawParams 

type RawParams struct {
	Query         string                 `json:"query"`
	OperationName string                 `json:"operationName"`
	Variables     map[string]interface{} `json:"variables"`
	Extensions    map[string]interface{} `json:"extensions"`
	Headers       http.Header            `json:"headers"`

	ReadTime TraceTiming `json:"-"`
}

func (*RawParams) AddUpload 

func (p *RawParams) AddUpload(upload Upload, key, path string) *gqlerror.Error

type RecoverFunc 

type RecoverFunc func(ctx context.Context, err interface{}) (userMessage error)

type RequestContext deprecated 

type RequestContext = OperationContext

Deprecated: Please update all references to OperationContext instead

func GetRequestContext deprecated 

func GetRequestContext(ctx context.Context) *RequestContext

Deprecated: Please update all references to GetOperationContext instead

type Resolver 

type Resolver func(ctx context.Context) (res interface{}, err error)

type ResolverContext deprecated 

type ResolverContext = FieldContext

Deprecated: Use FieldContext instead

func GetResolverContext deprecated 

func GetResolverContext(ctx context.Context) *ResolverContext

Deprecated: Use GetFieldContext instead

type Response 

type Response struct {
	Errors     gqlerror.List          `json:"errors,omitempty"`
	Data       json.RawMessage        `json:"data,omitempty"`
	Extensions map[string]interface{} `json:"extensions,omitempty"`
}

Errors are intentionally serialized first based on the advice in https://github.com/facebook/graphql/commit/7b40390d48680b15cb93e02d46ac5eb249689876#diff-757cea6edf0288677a9eea4cfc801d87R107 and https://github.com/facebook/graphql/pull/384

func ErrorResponse 

func ErrorResponse(ctx context.Context, messagef string, args ...interface{}) *Response

type ResponseHandler 

type ResponseHandler func(ctx context.Context) *Response

func OneShot 

func OneShot(resp *Response) ResponseHandler

type ResponseInterceptor 

type ResponseInterceptor interface {
	InterceptResponse(ctx context.Context, next ResponseHandler) *Response
}

ResponseInterceptor is called around each graphql operation response. This can be called many times for a single operation the case of subscriptions.

type ResponseMiddleware 

type ResponseMiddleware func(ctx context.Context, next ResponseHandler) *Response

type RootFieldContext 

type RootFieldContext struct {
	// The name of the type this field belongs to
	Object string
	// The raw field
	Field CollectedField
}

func GetRootFieldContext 

func GetRootFieldContext(ctx context.Context) *RootFieldContext

type RootFieldInterceptor 

type RootFieldInterceptor interface {
	InterceptRootField(ctx context.Context, next RootResolver) Marshaler
}

type RootFieldMiddleware 

type RootFieldMiddleware func(ctx context.Context, next RootResolver) Marshaler

type RootResolver 

type RootResolver func(ctx context.Context) Marshaler

type Stats 

type Stats struct {
	OperationStart time.Time
	Read           TraceTiming
	Parsing        TraceTiming
	Validation     TraceTiming
	// contains filtered or unexported fields
}

func (*Stats) GetExtension 

func (c *Stats) GetExtension(name string) interface{}

func (*Stats) SetExtension 

func (c *Stats) SetExtension(name string, data interface{})

type Status 

type Status int

type Subscription 

type Subscription struct{}

type TraceTiming 

type TraceTiming struct {
	Start time.Time
	End   time.Time
}

type Transport 

type Transport interface {
	Supports(r *http.Request) bool
	Do(w http.ResponseWriter, r *http.Request, exec GraphExecutor)
}

Transport provides support for different wire level encodings of graphql requests, eg Form, Get, Post, Websocket

type Unmarshaler 

type Unmarshaler interface {
	UnmarshalGQL(v interface{}) error
}

type Upload 

type Upload struct {
	File        io.ReadSeeker
	Filename    string
	Size        int64
	ContentType string
}

func UnmarshalUpload 

func UnmarshalUpload(v interface{}) (Upload, error)

type WriterFunc 

type WriterFunc func(writer io.Writer)

func (WriterFunc) MarshalGQL 

func (f WriterFunc) MarshalGQL(w io.Writer)

Source Files

View all Source files

Directories

Path Synopsis
testexecutor
apollofederatedtracingv1
apollofederatedtracingv1/generated
apollotracing
debug
extension
lru
testserver
transport
introspection implements the spec defined in https://github.com/facebook/graphql/blob/master/spec/Section%204%20--%20Introspection.md#schema-introspection
 introspection implements the spec defined in https://github.com/facebook/graphql/blob/master/spec/Section%204%20--%20Introspection.md#schema-introspection

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