middleware_http_logging.go

Documentation: github.com/aws/smithy-go/transport/http

     1  package http
     2  
     3  import (
     4  	"context"
     5  	"fmt"
     6  	"net/http/httputil"
     7  
     8  	"github.com/aws/smithy-go/logging"
     9  	"github.com/aws/smithy-go/middleware"
    10  )
    11  
    12  // RequestResponseLogger is a deserialize middleware that will log the request and response HTTP messages and optionally
    13  // their respective bodies. Will not perform any logging if none of the options are set.
    14  type RequestResponseLogger struct {
    15  	LogRequest         bool
    16  	LogRequestWithBody bool
    17  
    18  	LogResponse         bool
    19  	LogResponseWithBody bool
    20  }
    21  
    22  // ID is the middleware identifier.
    23  func (r *RequestResponseLogger) ID() string {
    24  	return "RequestResponseLogger"
    25  }
    26  
    27  // HandleDeserialize will log the request and response HTTP messages if configured accordingly.
    28  func (r *RequestResponseLogger) HandleDeserialize(
    29  	ctx context.Context, in middleware.DeserializeInput, next middleware.DeserializeHandler,
    30  ) (
    31  	out middleware.DeserializeOutput, metadata middleware.Metadata, err error,
    32  ) {
    33  	logger := middleware.GetLogger(ctx)
    34  
    35  	if r.LogRequest || r.LogRequestWithBody {
    36  		smithyRequest, ok := in.Request.(*Request)
    37  		if !ok {
    38  			return out, metadata, fmt.Errorf("unknown transport type %T", in)
    39  		}
    40  
    41  		rc := smithyRequest.Build(ctx)
    42  		reqBytes, err := httputil.DumpRequestOut(rc, r.LogRequestWithBody)
    43  		if err != nil {
    44  			return out, metadata, err
    45  		}
    46  
    47  		logger.Logf(logging.Debug, "Request\n%v", string(reqBytes))
    48  
    49  		if r.LogRequestWithBody {
    50  			smithyRequest, err = smithyRequest.SetStream(rc.Body)
    51  			if err != nil {
    52  				return out, metadata, err
    53  			}
    54  			in.Request = smithyRequest
    55  		}
    56  	}
    57  
    58  	out, metadata, err = next.HandleDeserialize(ctx, in)
    59  
    60  	if (err == nil) && (r.LogResponse || r.LogResponseWithBody) {
    61  		smithyResponse, ok := out.RawResponse.(*Response)
    62  		if !ok {
    63  			return out, metadata, fmt.Errorf("unknown transport type %T", out.RawResponse)
    64  		}
    65  
    66  		respBytes, err := httputil.DumpResponse(smithyResponse.Response, r.LogResponseWithBody)
    67  		if err != nil {
    68  			return out, metadata, fmt.Errorf("failed to dump response %w", err)
    69  		}
    70  
    71  		logger.Logf(logging.Debug, "Response\n%v", string(respBytes))
    72  	}
    73  
    74  	return out, metadata, err
    75  }
    76
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