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package acme
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
)
// Problem document as defined in,
// https://tools.ietf.org/html/rfc7807
// Problem represents an error returned by an acme server.
type Problem struct {
Type string `json:"type"`
Detail string `json:"detail,omitempty"`
Status int `json:"status,omitempty"`
Instance string `json:"instance,omitempty"`
SubProblems []SubProblem `json:"subproblems,omitempty"`
}
type SubProblem struct {
Type string `json:"type"`
Detail string `json:"detail"`
Identifier Identifier `json:"identifier"`
}
// Returns a human readable error string.
func (err Problem) Error() string {
s := fmt.Sprintf("acme: error code %d %q: %s", err.Status, err.Type, err.Detail)
if len(err.SubProblems) > 0 {
for _, v := range err.SubProblems {
s += fmt.Sprintf(", problem %q: %s", v.Type, v.Detail)
}
}
if err.Instance != "" {
s += ", url: " + err.Instance
}
return s
}
// Helper function to determine if a response contains an expected status code, or otherwise an error object.
func checkError(resp *http.Response, expectedStatuses ...int) error {
for _, statusCode := range expectedStatuses {
if resp.StatusCode == statusCode {
return nil
}
}
if resp.StatusCode < 400 || resp.StatusCode >= 600 {
return fmt.Errorf("acme: expected status codes: %d, got: %d %s", expectedStatuses, resp.StatusCode, resp.Status)
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return fmt.Errorf("acme: error reading error body: %v", err)
}
acmeError := Problem{}
if err := json.Unmarshal(body, &acmeError); err != nil {
return fmt.Errorf("acme: parsing error body: %v - %s", err, string(body))
}
return acmeError
}