c8fac94617
Replace ping logic with individual functions to extract API version and authorization challenges. The response from a ping operation can be passed into these function. If an error occurs in parsing, the version or challenge will not be used. Sending the ping request is the responsibility of the caller. APIVersion has been converted from a string to a structure type. A parse function was added to convert from string to the structure type. Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
package auth
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import (
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"net/http"
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"strings"
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)
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// APIVersion represents a version of an API including its
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// type and version number.
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type APIVersion struct {
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// Type refers to the name of a specific API specification
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// such as "registry"
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Type string
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// Version is the vesion of the API specification implemented,
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// This may omit the revision number and only include
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// the major and minor version, such as "2.0"
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Version string
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}
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// String returns the string formatted API Version
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func (v APIVersion) String() string {
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return v.Type + "/" + v.Version
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}
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// APIVersions gets the API versions out of an HTTP response using the provided
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// version header as the key for the HTTP header.
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func APIVersions(resp *http.Response, versionHeader string) []APIVersion {
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versions := []APIVersion{}
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if versionHeader != "" {
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for _, supportedVersions := range resp.Header[http.CanonicalHeaderKey(versionHeader)] {
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for _, version := range strings.Fields(supportedVersions) {
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versions = append(versions, ParseAPIVersion(version))
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}
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}
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}
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return versions
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}
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// ParseAPIVersion parses an API version string into an APIVersion
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// Format (Expected, not enforced):
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// API version string = <API type> '/' <API version>
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// API type = [a-z][a-z0-9]*
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// API version = [0-9]+(\.[0-9]+)?
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// TODO(dmcgowan): Enforce format, add error condition, remove unknown type
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func ParseAPIVersion(versionStr string) APIVersion {
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idx := strings.IndexRune(versionStr, '/')
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if idx == -1 {
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return APIVersion{
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Type: "unknown",
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Version: versionStr,
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}
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}
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return APIVersion{
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Type: strings.ToLower(versionStr[:idx]),
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Version: versionStr[idx+1:],
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}
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}
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