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94 lines
2.8 KiB
94 lines
2.8 KiB
// Copyright (c) 2021 Proton Technologies AG |
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// |
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// This file is part of ProtonMail Bridge. |
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// |
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// ProtonMail Bridge is free software: you can redistribute it and/or modify |
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// it under the terms of the GNU General Public License as published by |
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// the Free Software Foundation, either version 3 of the License, or |
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// (at your option) any later version. |
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// |
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// ProtonMail Bridge is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// |
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// You should have received a copy of the GNU General Public License |
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>. |
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package pmapi |
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import ( |
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"errors" |
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"fmt" |
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"net/http" |
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"time" |
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) |
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const protonStatusURL = "http://protonstatus.com/vpn_status" |
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// ErrNoInternetConnection indicates that both protonstatus and the API are unreachable. |
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var ErrNoInternetConnection = errors.New("no internet connection") |
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// CheckConnection returns an error if there is no internet connection. |
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// This should be moved to the ConnectionManager when it is implemented. |
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func (cm *ClientManager) CheckConnection() error { |
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// We use a normal dialer here which doesn't check tls fingerprints. |
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client := &http.Client{Timeout: time.Second * 10} |
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// Do not cumulate timeouts, use goroutines. |
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retStatus := make(chan error) |
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retAPI := make(chan error) |
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// vpn_status endpoint is fast and returns only OK. We check the connection only. |
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go checkConnection(client, protonStatusURL, retStatus) |
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// Check of API reachability also uses a fast endpoint. |
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go checkConnection(client, cm.GetRootURL()+"/tests/ping", retAPI) |
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errStatus := <-retStatus |
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errAPI := <-retAPI |
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switch { |
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case errStatus == nil && errAPI == nil: |
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return nil |
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case errStatus == nil && errAPI != nil: |
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cm.log.Error("ProtonStatus is reachable but API is not") |
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return ErrAPINotReachable |
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case errStatus != nil && errAPI == nil: |
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cm.log.Warn("API is reachable but protonstatus is not") |
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return nil |
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case errStatus != nil && errAPI != nil: |
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cm.log.Error("Both ProtonStatus and API are unreachable") |
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return ErrNoInternetConnection |
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} |
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return nil |
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} |
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// CheckConnection returns an error if there is no internet connection. |
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func CheckConnection() error { |
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client := &http.Client{Timeout: time.Second * 10} |
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retStatus := make(chan error) |
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go checkConnection(client, protonStatusURL, retStatus) |
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return <-retStatus |
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} |
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func checkConnection(client *http.Client, url string, errorChannel chan error) { |
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resp, err := client.Get(url) |
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if err != nil { |
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errorChannel <- err |
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return |
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} |
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_ = resp.Body.Close() |
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if resp.StatusCode != 200 { |
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errorChannel <- fmt.Errorf("HTTP status code %d", resp.StatusCode) |
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return |
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} |
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errorChannel <- nil |
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}
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