/
api_op_DetectText.go
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/
api_op_DetectText.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package rekognition
import (
"context"
"errors"
"fmt"
"github.com/aws/aws-sdk-go-v2/aws"
awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
internalauth "github.com/aws/aws-sdk-go-v2/internal/auth"
"github.com/aws/aws-sdk-go-v2/service/rekognition/types"
smithyendpoints "github.com/aws/smithy-go/endpoints"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
)
// Detects text in the input image and converts it into machine-readable text.
// Pass the input image as base64-encoded image bytes or as a reference to an image
// in an Amazon S3 bucket. If you use the AWS CLI to call Amazon Rekognition
// operations, you must pass it as a reference to an image in an Amazon S3 bucket.
// For the AWS CLI, passing image bytes is not supported. The image must be either
// a .png or .jpeg formatted file. The DetectText operation returns text in an
// array of TextDetection elements, TextDetections . Each TextDetection element
// provides information about a single word or line of text that was detected in
// the image. A word is one or more script characters that are not separated by
// spaces. DetectText can detect up to 100 words in an image. A line is a string
// of equally spaced words. A line isn't necessarily a complete sentence. For
// example, a driver's license number is detected as a line. A line ends when there
// is no aligned text after it. Also, a line ends when there is a large gap between
// words, relative to the length of the words. This means, depending on the gap
// between words, Amazon Rekognition may detect multiple lines in text aligned in
// the same direction. Periods don't represent the end of a line. If a sentence
// spans multiple lines, the DetectText operation returns multiple lines. To
// determine whether a TextDetection element is a line of text or a word, use the
// TextDetection object Type field. To be detected, text must be within +/- 90
// degrees orientation of the horizontal axis. For more information, see Detecting
// text in the Amazon Rekognition Developer Guide.
func (c *Client) DetectText(ctx context.Context, params *DetectTextInput, optFns ...func(*Options)) (*DetectTextOutput, error) {
if params == nil {
params = &DetectTextInput{}
}
result, metadata, err := c.invokeOperation(ctx, "DetectText", params, optFns, c.addOperationDetectTextMiddlewares)
if err != nil {
return nil, err
}
out := result.(*DetectTextOutput)
out.ResultMetadata = metadata
return out, nil
}
type DetectTextInput struct {
// The input image as base64-encoded bytes or an Amazon S3 object. If you use the
// AWS CLI to call Amazon Rekognition operations, you can't pass image bytes. If
// you are using an AWS SDK to call Amazon Rekognition, you might not need to
// base64-encode image bytes passed using the Bytes field. For more information,
// see Images in the Amazon Rekognition developer guide.
//
// This member is required.
Image *types.Image
// Optional parameters that let you set the criteria that the text must meet to be
// included in your response.
Filters *types.DetectTextFilters
noSmithyDocumentSerde
}
type DetectTextOutput struct {
// An array of text that was detected in the input image.
TextDetections []types.TextDetection
// The model version used to detect text.
TextModelVersion *string
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationDetectTextMiddlewares(stack *middleware.Stack, options Options) (err error) {
err = stack.Serialize.Add(&awsAwsjson11_serializeOpDetectText{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpDetectText{}, middleware.After)
if err != nil {
return err
}
if err = addlegacyEndpointContextSetter(stack, options); err != nil {
return err
}
if err = addSetLoggerMiddleware(stack, options); err != nil {
return err
}
if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
return err
}
if err = addResolveEndpointMiddleware(stack, options); err != nil {
return err
}
if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
return err
}
if err = addRetryMiddlewares(stack, options); err != nil {
return err
}
if err = addHTTPSignerV4Middleware(stack, options); err != nil {
return err
}
if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
return err
}
if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil {
return err
}
if err = addClientUserAgent(stack, options); err != nil {
return err
}
if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = addDetectTextResolveEndpointMiddleware(stack, options); err != nil {
return err
}
if err = addOpDetectTextValidationMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDetectText(options.Region), middleware.Before); err != nil {
return err
}
if err = awsmiddleware.AddRecursionDetection(stack); err != nil {
return err
}
if err = addRequestIDRetrieverMiddleware(stack); err != nil {
return err
}
if err = addResponseErrorMiddleware(stack); err != nil {
return err
}
if err = addRequestResponseLogging(stack, options); err != nil {
return err
}
if err = addendpointDisableHTTPSMiddleware(stack, options); err != nil {
return err
}
return nil
}
func newServiceMetadataMiddleware_opDetectText(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
SigningName: "rekognition",
OperationName: "DetectText",
}
}
type opDetectTextResolveEndpointMiddleware struct {
EndpointResolver EndpointResolverV2
BuiltInResolver builtInParameterResolver
}
func (*opDetectTextResolveEndpointMiddleware) ID() string {
return "ResolveEndpointV2"
}
func (m *opDetectTextResolveEndpointMiddleware) HandleSerialize(ctx context.Context, in middleware.SerializeInput, next middleware.SerializeHandler) (
out middleware.SerializeOutput, metadata middleware.Metadata, err error,
) {
if awsmiddleware.GetRequiresLegacyEndpoints(ctx) {
return next.HandleSerialize(ctx, in)
}
req, ok := in.Request.(*smithyhttp.Request)
if !ok {
return out, metadata, fmt.Errorf("unknown transport type %T", in.Request)
}
if m.EndpointResolver == nil {
return out, metadata, fmt.Errorf("expected endpoint resolver to not be nil")
}
params := EndpointParameters{}
m.BuiltInResolver.ResolveBuiltIns(¶ms)
var resolvedEndpoint smithyendpoints.Endpoint
resolvedEndpoint, err = m.EndpointResolver.ResolveEndpoint(ctx, params)
if err != nil {
return out, metadata, fmt.Errorf("failed to resolve service endpoint, %w", err)
}
req.URL = &resolvedEndpoint.URI
for k := range resolvedEndpoint.Headers {
req.Header.Set(
k,
resolvedEndpoint.Headers.Get(k),
)
}
authSchemes, err := internalauth.GetAuthenticationSchemes(&resolvedEndpoint.Properties)
if err != nil {
var nfe *internalauth.NoAuthenticationSchemesFoundError
if errors.As(err, &nfe) {
// if no auth scheme is found, default to sigv4
signingName := "rekognition"
signingRegion := m.BuiltInResolver.(*builtInResolver).Region
ctx = awsmiddleware.SetSigningName(ctx, signingName)
ctx = awsmiddleware.SetSigningRegion(ctx, signingRegion)
}
var ue *internalauth.UnSupportedAuthenticationSchemeSpecifiedError
if errors.As(err, &ue) {
return out, metadata, fmt.Errorf(
"This operation requests signer version(s) %v but the client only supports %v",
ue.UnsupportedSchemes,
internalauth.SupportedSchemes,
)
}
}
for _, authScheme := range authSchemes {
switch authScheme.(type) {
case *internalauth.AuthenticationSchemeV4:
v4Scheme, _ := authScheme.(*internalauth.AuthenticationSchemeV4)
var signingName, signingRegion string
if v4Scheme.SigningName == nil {
signingName = "rekognition"
} else {
signingName = *v4Scheme.SigningName
}
if v4Scheme.SigningRegion == nil {
signingRegion = m.BuiltInResolver.(*builtInResolver).Region
} else {
signingRegion = *v4Scheme.SigningRegion
}
if v4Scheme.DisableDoubleEncoding != nil {
// The signer sets an equivalent value at client initialization time.
// Setting this context value will cause the signer to extract it
// and override the value set at client initialization time.
ctx = internalauth.SetDisableDoubleEncoding(ctx, *v4Scheme.DisableDoubleEncoding)
}
ctx = awsmiddleware.SetSigningName(ctx, signingName)
ctx = awsmiddleware.SetSigningRegion(ctx, signingRegion)
break
case *internalauth.AuthenticationSchemeV4A:
v4aScheme, _ := authScheme.(*internalauth.AuthenticationSchemeV4A)
if v4aScheme.SigningName == nil {
v4aScheme.SigningName = aws.String("rekognition")
}
if v4aScheme.DisableDoubleEncoding != nil {
// The signer sets an equivalent value at client initialization time.
// Setting this context value will cause the signer to extract it
// and override the value set at client initialization time.
ctx = internalauth.SetDisableDoubleEncoding(ctx, *v4aScheme.DisableDoubleEncoding)
}
ctx = awsmiddleware.SetSigningName(ctx, *v4aScheme.SigningName)
ctx = awsmiddleware.SetSigningRegion(ctx, v4aScheme.SigningRegionSet[0])
break
case *internalauth.AuthenticationSchemeNone:
break
}
}
return next.HandleSerialize(ctx, in)
}
func addDetectTextResolveEndpointMiddleware(stack *middleware.Stack, options Options) error {
return stack.Serialize.Insert(&opDetectTextResolveEndpointMiddleware{
EndpointResolver: options.EndpointResolverV2,
BuiltInResolver: &builtInResolver{
Region: options.Region,
UseDualStack: options.EndpointOptions.UseDualStackEndpoint,
UseFIPS: options.EndpointOptions.UseFIPSEndpoint,
Endpoint: options.BaseEndpoint,
},
}, "ResolveEndpoint", middleware.After)
}