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package server
import (
"encoding/json"
"errors"
"fmt"
"net/http"
"net/url"
"time"
httpw "github.com/jwijenbergh/eduvpn-common/internal/http"
"github.com/jwijenbergh/eduvpn-common/internal/types"
)
func APIGetEndpoints(baseURL string) (*ServerEndpoints, error) {
errorMessage := "failed getting server endpoints"
url := fmt.Sprintf("%s/%s", baseURL, WellKnownPath)
_, body, bodyErr := httpw.HTTPGet(url)
if bodyErr != nil {
return nil, &types.WrappedErrorMessage{Message: errorMessage, Err: bodyErr}
}
endpoints := &ServerEndpoints{}
jsonErr := json.Unmarshal(body, endpoints)
if jsonErr != nil {
return nil, &types.WrappedErrorMessage{Message: errorMessage, Err: jsonErr}
}
return endpoints, nil
}
func apiAuthorized(
server Server,
method string,
endpoint string,
opts *httpw.HTTPOptionalParams,
) (http.Header, []byte, error) {
errorMessage := "failed API authorized"
// Ensure optional is not nil as we will fill it with headers
if opts == nil {
opts = &httpw.HTTPOptionalParams{}
}
base, baseErr := server.GetBase()
if baseErr != nil {
return nil, nil, &types.WrappedErrorMessage{Message: errorMessage, Err: baseErr}
}
url := base.Endpoints.API.V3.API + endpoint
// Make sure the tokens are valid, this will return an error if re-login is needed
oauthErr := EnsureTokens(server)
if oauthErr != nil {
return nil, nil, &types.WrappedErrorMessage{Message: errorMessage, Err: oauthErr}
}
headerKey := "Authorization"
headerValue := fmt.Sprintf("Bearer %s", GetHeaderToken(server))
if opts.Headers != nil {
opts.Headers.Add(headerKey, headerValue)
} else {
opts.Headers = http.Header{headerKey: {headerValue}}
}
return httpw.HTTPMethodWithOpts(method, url, opts)
}
func apiAuthorizedRetry(
server Server,
method string,
endpoint string,
opts *httpw.HTTPOptionalParams,
) (http.Header, []byte, error) {
errorMessage := "failed authorized API retry"
header, body, bodyErr := apiAuthorized(server, method, endpoint, opts)
if bodyErr != nil {
var error *httpw.HTTPStatusError
// Only retry authorized if we get a HTTP 401
if errors.As(bodyErr, &error) && error.Status == 401 {
// Mark the token as expired and retry so we trigger the refresh flow
MarkTokenExpired(server)
retryHeader, retryBody, retryErr := apiAuthorized(server, method, endpoint, opts)
if retryErr != nil {
return nil, nil, &types.WrappedErrorMessage{Message: errorMessage, Err: retryErr}
}
return retryHeader, retryBody, nil
}
return nil, nil, &types.WrappedErrorMessage{Message: errorMessage, Err: bodyErr}
}
return header, body, nil
}
func APIInfo(server Server) error {
errorMessage := "failed API /info"
_, body, bodyErr := apiAuthorizedRetry(server, http.MethodGet, "/info", nil)
if bodyErr != nil {
return &types.WrappedErrorMessage{Message: errorMessage, Err: bodyErr}
}
structure := ServerProfileInfo{}
jsonErr := json.Unmarshal(body, &structure)
if jsonErr != nil {
return &types.WrappedErrorMessage{Message: errorMessage, Err: jsonErr}
}
base, baseErr := server.GetBase()
if baseErr != nil {
return &types.WrappedErrorMessage{Message: errorMessage, Err: baseErr}
}
// Store the profiles and make sure that the current profile is not overwritten
previousProfile := base.Profiles.Current
base.Profiles = structure
base.Profiles.Current = previousProfile
base.ProfilesRaw = string(body)
return nil
}
func APIConnectWireguard(
server Server,
profile_id string,
pubkey string,
supportsOpenVPN bool,
) (string, string, time.Time, error) {
errorMessage := "failed obtaining a WireGuard configuration"
headers := http.Header{
"content-type": {"application/x-www-form-urlencoded"},
"accept": {"application/x-wireguard-profile"},
}
if supportsOpenVPN {
headers.Add("accept", "application/x-openvpn-profile")
}
urlForm := url.Values{
"profile_id": {profile_id},
"public_key": {pubkey},
}
header, connectBody, connectErr := apiAuthorizedRetry(
server,
http.MethodPost,
"/connect",
&httpw.HTTPOptionalParams{Headers: headers, Body: urlForm},
)
if connectErr != nil {
return "", "", time.Time{}, &types.WrappedErrorMessage{
Message: errorMessage,
Err: connectErr,
}
}
expires := header.Get("expires")
pTime, pTimeErr := http.ParseTime(expires)
if pTimeErr != nil {
return "", "", time.Time{}, &types.WrappedErrorMessage{Message: errorMessage, Err: pTimeErr}
}
contentType := header.Get("content-type")
content := "openvpn"
if contentType == "application/x-wireguard-profile" {
content = "wireguard"
}
return string(connectBody), content, pTime, nil
}
func APIConnectOpenVPN(server Server, profile_id string) (string, time.Time, error) {
errorMessage := "failed obtaining an OpenVPN configuration"
headers := http.Header{
"content-type": {"application/x-www-form-urlencoded"},
"accept": {"application/x-openvpn-profile"},
}
urlForm := url.Values{
"profile_id": {profile_id},
}
header, connectBody, connectErr := apiAuthorizedRetry(
server,
http.MethodPost,
"/connect",
&httpw.HTTPOptionalParams{Headers: headers, Body: urlForm},
)
if connectErr != nil {
return "", time.Time{}, &types.WrappedErrorMessage{Message: errorMessage, Err: connectErr}
}
expires := header.Get("expires")
pTime, pTimeErr := http.ParseTime(expires)
if pTimeErr != nil {
return "", time.Time{}, &types.WrappedErrorMessage{Message: errorMessage, Err: pTimeErr}
}
return string(connectBody), pTime, nil
}
// This needs no further return value as it's best effort
// FIXME: doAuth should not be needed here
func APIDisconnect(server Server) {
apiAuthorized(server, http.MethodPost, "/disconnect", nil)
}
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