}

	ctx = newContext(r, w, action)

	token := r.Form.Get(stsToken)
	if token == "" {
		token = r.Form.Get(stsWebIdentityToken)
	}

	accessToken := r.Form.Get(stsWebIdentityAccessToken)

	// RoleARN parameter processing: If a role ARN is given in the request, we
	// use that and validate the authentication request. If not, we assume this
	// is an STS request for a claim based IDP (if one is present) and set

	if req.Form.Get(xhttp.AmzExpires) != query.Get(xhttp.AmzExpires) {
		return ErrSignatureDoesNotMatch
	}
	// Verify if signed headers query is same.
	if req.Form.Get(xhttp.AmzSignedHeaders) != query.Get(xhttp.AmzSignedHeaders) {
		return ErrSignatureDoesNotMatch
	}
	// Verify if credential query is same.
	if req.Form.Get(xhttp.AmzCredential) != query.Get(xhttp.AmzCredential) {
		return ErrSignatureDoesNotMatch
	}

	if objectAPI == nil {
		return
	}

	sizeStr := r.Form.Get(peerRESTSize)
	durationStr := r.Form.Get(peerRESTDuration)
	concurrentStr := r.Form.Get(peerRESTConcurrent)
	storageClass := strings.TrimSpace(r.Form.Get(peerRESTStorageClass))
	customBucket := strings.TrimSpace(r.Form.Get(peerRESTBucket))
	autotune := r.Form.Get("autotune") == "true"
	noClear := r.Form.Get("noclear") == "true"

      exercising permissions granted by this License.

      "Source" form shall mean the preferred form for making modifications,
      including but not limited to software source code, documentation
      source, and configuration files.

      "Object" form shall mean any form resulting from mechanical
      transformation or translation of a Source form, including but
      not limited to compiled object code, generated documentation,

	if err != nil {
		return false, err
	}

	// Handle large OPA responses when OPA URL is of
	// form http://localhost:8181/v1/data/httpapi/authz
	type opaResultAllow struct {
		Result struct {
			Allow bool `json:"allow"`
		} `json:"result"`
	}

	// Handle simpler OPA responses when OPA URL is of
	// form http://localhost:8181/v1/data/httpapi/authz/allow
	type opaResult struct {
		Result bool `json:"result"`
	}

	}
	opts.Speedtest = header.Get(globalObjectPerfUserMetadata) != ""
	return
}

// get ObjectOptions for GET calls from encryption headers
func getOpts(ctx context.Context, r *http.Request, bucket, object string) (ObjectOptions, error) {
	var opts ObjectOptions

	var partNumber int
	var err error
	if pn := r.Form.Get(xhttp.PartNumber); pn != "" {
		partNumber, err = strconv.Atoi(pn)
		if err != nil {
			return opts, err
		}

     limitation to copyright. More considerations for licensors:
	wiki.creativecommons.org/Considerations_for_licensors

     Considerations for the public: By using one of our public
     licenses, a licensor grants the public permission to use the
     licensed material under specified terms and conditions. If
     the licensor's permission is not necessary for any reason--for
     example, because of any applicable exception or limitation to

	// Iterate over policy conditions and check them against received form fields
	for _, policy := range postPolicyForm.Conditions.Policies {
		// Form fields names are in canonical format, convert conditions names
		// to canonical for simplification purpose, so `$key` will become `Key`
		formCanonicalName := http.CanonicalHeaderKey(strings.TrimPrefix(policy.Key, "$"))
		// Operator for the current policy condition
		op := policy.Operator

)

const (
	// Maximum allowed form data field values. 64MiB is a guessed practical value
	// which is more than enough to accommodate any form data fields and headers.
	requestFormDataSize = 64 * humanize.MiByte

	// For any HTTP request, request body should be not more than 16GiB + requestFormDataSize
	// where, 16GiB is the maximum allowed object size for object upload.

}

// SubstringFunc represents SUBSTRING sql function
type SubstringFunc struct {
	Expr *PrimaryTerm `parser:" \"SUBSTRING\" \"(\" @@ "`
	From *Operand     `parser:" ( \"FROM\" @@ "`
	For  *Operand     `parser:"   (\"FOR\" @@)? \")\" "`
	Arg2 *Operand     `parser:" | \",\" @@ "`
	Arg3 *Operand     `parser:"   (\",\" @@)? \")\" )"`
}

// ExtractFunc represents EXTRACT sql function